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1

Phase II: Performance Evaluation of Permeable Reactive Barriers and  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Phase II: Performance Evaluation of Permeable Reactive Barriers and Phase II: Performance Evaluation of Permeable Reactive Barriers and Potential for Rejuvenation by Chemical Flushing Phase II: Performance Evaluation of Permeable Reactive Barriers and Potential for Rejuvenation by Chemical Flushing Final Report Phase II: Performance Evaluation of Permeable Reactive Barriers and Potential for Rejuvenation by Chemical Flushing U. S. Environmental Protection Agency Region 8 Support January 2004 Phase II: Performance Evaluation of Permeable Reactive Barriers and Potential for Rejuvenation by Chemical Flushing More Documents & Publications Final Report Phase II: Performance Evaluation of Permeable Reactive Barriers and Potential for Rejuvenation by Chemical Flushing Rejuvenating Permeable Reactive Barriers by Chemical Flushing

2

Final Report Phase II: Performance Evaluation of Permeable Reactive  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Final Report Phase II: Performance Evaluation of Permeable Reactive Final Report Phase II: Performance Evaluation of Permeable Reactive Barriers and Potential for Rejuvenation by Chemical Flushing Final Report Phase II: Performance Evaluation of Permeable Reactive Barriers and Potential for Rejuvenation by Chemical Flushing Final Report Phase II: Performance Evaluation of Permeable Reactive Barriers and Potential for Rejuvenation by Chemical Flushing Final Report Phase II: Performance Evaluation of Permeable Reactive Barriers and Potential for Rejuvenation by Chemical Flushing More Documents & Publications Phase II: Performance Evaluation of Permeable Reactive Barriers and Potential for Rejuvenation by Chemical Flushing Rejuvenating Permeable Reactive Barriers by Chemical Flushing Final Report - Rejuvenating Permeable Reactive Barriers by Chemical

3

Final Report Phase II: Performance Evaluation of Permeable Reactive  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Final Report Phase II: Performance Evaluation of Permeable Reactive Final Report Phase II: Performance Evaluation of Permeable Reactive Barriers and Potential for Rejuvenation by Chemical Flushing Final Report Phase II: Performance Evaluation of Permeable Reactive Barriers and Potential for Rejuvenation by Chemical Flushing Final Report Phase II: Performance Evaluation of Permeable Reactive Barriers and Potential for Rejuvenation by Chemical Flushing Final Report Phase II: Performance Evaluation of Permeable Reactive Barriers and Potential for Rejuvenation by Chemical Flushing More Documents & Publications Phase II: Performance Evaluation of Permeable Reactive Barriers and Potential for Rejuvenation by Chemical Flushing Final Report - Rejuvenating Permeable Reactive Barriers by Chemical Flushing, U.S. Environmental Protection Agency Region 8 Support

4

Performance Evaluation  

Science Conference Proceedings (OSTI)

The Performance Evaluation Subcommittee of the Technical Committee on Computer Architecture sponsored a workshop at Argonne National Laboratories in October 1971. This issue is in part a result of that workshop.

R. R. Shirley

1972-09-01T23:59:59.000Z

5

Sample Exchange Evaluation (SEE) Report - Phase II  

SciTech Connect

This report describes the results from Phase II of the Sample Exchange Evaluation (SEE) Program, a joint effort to compare analytical laboratory performance on samples from the Hanford Site`s high-level waste tanks. In Phase II, the program has been expanded to include inorganic constituents in addition to radionuclides. Results from Phase II that exceeded 20% relative percent difference criteria are identified.

Winters, W.I.

1994-09-28T23:59:59.000Z

6

NSLS-II Design and Performance  

NLE Websites -- All DOE Office Websites (Extended Search)

NSLS-II Design & Performance NSLS-II CD-0 Proposal Preliminary Design Report (PDR) Conceptual Design Report (CDR) Source Properties (.pdf) Cell section Last Modified: April 2,...

7

Evaluating Steam Trap Performance  

E-Print Network (OSTI)

Laboratory tests were conducted on several types of steam traps at Holston Defense Corporation in Kingsport, Tennessee. Data from these tests, which determined their relative efficiencies, were used in performing economic analyses to determine their equivalent uniform annual cost (EUAC). The comparison was made using a computer program written for the Apple II computer to evaluate overall steam trap economics. This program calculates the EUAC for any steam trap based on 12 input variables including capital, maintenance and steam costs, interest rate and trap life. After determinIng the EUAC, the program will perform sensitivity analyses on any of the twelve variables. (This computer program is available from the author.) This study shows that inverted bucket traps have lower EUAC's under more conditions than other types of traps. Also, this study shows that live steam loss is the heaviest contributor to the annual operating cost of any steam trap and that maintenance frequency and repair cost are also more important than a trap's first cost.

Fuller, N. Y.

1986-06-01T23:59:59.000Z

8

Explosive Cyclogenesis over the West-Central North Atlantic Ocean, 1981–84. Part II. Evaluation of LFM Model Performance  

Science Conference Proceedings (OSTI)

A study was made of the performance of the Limited-Area Fine-Mesh (LFM) operational forecasts for cases of explosive cyclogenesis in the west-central North Atlantic Ocean during 1981–84. For 51 instances in which the observed 12-h deepening was ...

Frederick Sanders

1986-11-01T23:59:59.000Z

9

Multics Security Evaluation (Volume II): Vulnerability Analysis  

Science Conference Proceedings (OSTI)

Page 1. ESD-TR-74-J93, Vor. II ' MULTICS SECURITY EVALUATION: VULNERABILITY ANALYSIS Pau r A. Karger, 2Lt ...

2013-04-15T23:59:59.000Z

10

Smog Check II Evaluation California Inspection and  

E-Print Network (OSTI)

Smog Check II Evaluation Glossary . . . . . . . . . . . . California Inspection and Maintenance Review Committee #12;Contents Glossary of Acronyms ____________________________________________ 1 Glossary of Terms _______________________________________________ 3 #12;G-1 Glossary of Acronyms APCD Air

Denver, University of

11

Instrument performance evaluation  

Science Conference Proceedings (OSTI)

Deficiencies exist in both the performance and the quality of health physics instruments. Recognizing the implications of such deficiencies for the protection of workers and the public, in the early 1980s the DOE and the NRC encouraged the development of a performance standard and established a program to test a series of instruments against criteria in the standard. The purpose of the testing was to establish the practicality of the criteria in the standard, to determine the performance of a cross section of available instruments, and to establish a testing capability. Over 100 instruments were tested, resulting in a practical standard and an understanding of the deficiencies in available instruments. In parallel with the instrument testing, a value-impact study clearly established the benefits of implementing a formal testing program. An ad hoc committee also met several times to establish recommendations for the voluntary implementation of a testing program based on the studies and the performance standard. For several reasons, a formal program did not materialize. Ongoing tests and studies have supported the development of specific instruments and have helped specific clients understand the performance of their instruments. The purpose of this presentation is to trace the history of instrument testing to date and suggest the benefits of a centralized formal program.

Swinth, K.L.

1993-03-01T23:59:59.000Z

12

Performance Evaluation and Measurement Plan for NREL  

NLE Websites -- All DOE Office Websites (Extended Search)

AND MEASUREMENT PLAN FOR EVALUATING CONTRACTOR PERFORMANCE AT THE NATIONAL RENEWABLE ENERGY LABORATORY 1.0 PERFORMANCE EVALUATION and MEASUREMENT PLAN The Performance Evaluation...

13

Evaluation report II: conservation progress report  

SciTech Connect

This report Volume II, for a project evaluation proposal for the Office of Conservation at Seattle City Light (SCL) presents summaries of the costs to date and comments on projects undertaken in the following areas: commercial/industrial; residential; outreach; in-house conservation; research development, and demonstration; and support activities. Detailed results are presented in Section II. Mr. Dan Geballe from SCL calculates that conservation was running between 55 and 60 MW during the first half of 1978. Currently Seattle load is growing rapidly, but there is no reason to believe that conservation is not continuing at or above the 55 to 60 MW measured, Mr. Geballe concludes. (MCW)

1979-01-01T23:59:59.000Z

14

Performance evaluation with temporal rewards  

Science Conference Proceedings (OSTI)

Today many formalisms exist for specifying complex Markov chains. In contrast, formalisms for specifying rewards, enabling the analysis of long-run average performance properties, have remained quite primitive. Basically, they only support the analysis ... Keywords: Markov chains, path-based reward variables, performance evaluation, reward functions, temporal logic

Jeroen P. M. Voeten

2002-11-01T23:59:59.000Z

15

Solar Two Performance Evaluation Methodology  

Science Conference Proceedings (OSTI)

Solar Two is a 10-MWe prototype central-receiver plant east of Barstow, California. Solar Two, which is sponsored by a consortium of utilities and industry in partnership with the U.S. Department of Energy, began regular electricity production in February 1997. The objective of Solar Two's performance evaluation activity is to understand the plant's performance and to use the evaluation information for the following purposes: optimize plant performance, extrapolate Solar Two's performance to general performance of molten-salt central-receiver technology, and recommend revisions to predictive models and engineering design methods for Solar Two and future-generation molten-salt central-receiver technology. The primary aspect of the performance evaluation is the lost-electricity analysis. This analysis compares the actual generation with the generation predicted by the Solar Two model. (SOLERGY, a computer program designed by Sandia National Laboratories to simulate the operation and power output of a solar central-receiver power plant is the code used to model Solar Two.) The difference between the predicted and the actual generation (i.e., the lost electricity) is broken down into the different efficiency and availability categories responsible for the loss. Having the losses broken down by system and in terms of electricity is useful for understanding and improving the plant's performance; it provides a tool for determining the best operating procedures for plant performance and the allocation of operation and maintenance resources for the best performance payback.

Mary Jane Hale

1999-11-01T23:59:59.000Z

16

Performance evaluation of a solar air-heating and nocturnal cooling system in CSU Solar House II. Final report, June 1, 1977-September 30, 1978  

DOE Green Energy (OSTI)

The solar heating system in Solar House II consists of 67.1 m/sup 2/ of double-glazed air-heating collectors with flat-black absorbers, 10.3 m/sup 3/ of pebble bed storage, air-to-water heat exchanger for preheating domestic water and one blower to circulate the air through the system. The nocturnal cooling system consists of an evaporative cooler and utilizes the pebble bed for cool storage. A schematic diagram of the system is shown.

Karaki, S.

1979-04-01T23:59:59.000Z

17

Solar Two Performance Evaluation Methodology  

DOE Green Energy (OSTI)

The primary aspect of the performance evaluation is the lost-electricity analysis. This analysis compares the actual generation with the generation predicted by the Solar Two model. (SOLERGY, a computer program designed by Sandia National Laboratories to simulate the operation and power output of a solar central-receiver power plant is the code used to model Solar Two.) The difference between the predicted and the actual generation (i.e., the lost electricity) is broken down into the different efficiency and availability categories responsible for the loss. Having the losses broken down by system and in terms of electricity is useful for understanding and improving the plant's performance; it provides a tool for determining the best operating procedures for plant performance and the allocation of operation and maintenance resources for the best performance payback.

Mary Jane Hale

1999-11-01T23:59:59.000Z

18

SESCDP Supervisor's Evaluation of Candidate's Performance During...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Assignment Form used by SES Supervisor to evaluate a SES candidate's performance in terms of meeting assignment objectives, an overall rating of the candidate's performance,...

19

Performance Evaluations | National Nuclear Security Administration  

National Nuclear Security Administration (NNSA)

Performance Evaluations | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response...

20

H.__ PERFORMANCE EVALUATION AND MEASUREMENT PLAN  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

PERFORMANCE EVALUATION AND MEASUREMENT PLAN PERFORMANCE EVALUATION AND MEASUREMENT PLAN (a) The determination of performance-based fee earned shall be based upon a Performance Evaluation and Measurement Plan (PEMP), which includes the performance criteria for earning performance-based fee and the distribution of performance-based fee as provided in paragraph (d) below. The PEMP will be unilaterally established by the Government. A copy of the plan shall be provided to the Contractor with approval of the Contract Baseline. Both the PEMP and the approved Contract Baseline are hereby incorporated by reference. (b) Key performance commitments proposed by the Contractor and accepted by the Government are incorporated into Section H clause entitled "Performance Requirements" and will be included in the performance criteria in the PEMP.

Note: This page contains sample records for the topic "ii performance evaluation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Performance Evaluation and Benchmarking of Intelligent ...  

Science Conference Proceedings (OSTI)

Performance Evaluation and Benchmarking of Intelligent Systems Book. 2009, XIX, 338 p., Hardcover ISBN: 978-1-4419-0491-1 ... About this book: ...

2010-12-20T23:59:59.000Z

22

Plenary II -- Evaluation of Shortline Railroads  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Evaluation of Shortline Railroads Task: Task: Identify Shortline Railroads Serving Nuclear Power Plants or Identify Shortline Railroads Serving Nuclear Power Plants or...

23

Plenary II -- Evaluation of Shortline Railroads  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

DOT DOT U.S. DOT Federal Railroad Federal Railroad Administration Administration DOE Rail TEC DOE Rail TEC Winter Winter Meeting Meeting February February 6, 6, 2008, San Antonio, TX 2008, San Antonio, TX Evaluation of Shortline Railroads Evaluation of Shortline Railroads Tasked for the Transportation of Spent Nuclear Fuel Tasked for the Transportation of Spent Nuclear Fuel Evaluation of Shortline Railroads Evaluation of Shortline Railroads Task: Task: Identify Shortline Railroads Serving Nuclear Power Plants or Identify Shortline Railroads Serving Nuclear Power Plants or Involved in the Transportation Link Involved in the Transportation Link Establish Contact Information with Railroads Officials Establish Contact Information with Railroads Officials Field Review of each Railroad

24

A performance evaluation of three multiagent platforms  

Science Conference Proceedings (OSTI)

In the last few years, many researchers have focused on testing the performance of Multiagent Platforms. Results obtained show a lack of performance and scalability on current Multiagent Platforms, but the existing research does not tackle poor efficiency ... Keywords: Multiagent platforms, Multiagent systems, Performance evaluation

Juan M. Alberola; Jose M. Such; Ana Garcia-Fornes; Agustin Espinosa; Vicent Botti

2010-08-01T23:59:59.000Z

25

Tory II-C off-design performance  

SciTech Connect

This memorandum reports the performance of TORY II-C at off-design altitudes and Mach numbers. Inlet pressure recovery has been varied with Mach number, reasonable values for a real inlet having been chosen. Nozzle throat area and exit area have been fixed at the design values. Hence this study can be used, in conjunction with missile drag data, to construct a flight envelope.

Moyer, J. H.

1963-04-22T23:59:59.000Z

26

Performance Evaluation of Undulator Radiation at CEBAF  

Science Conference Proceedings (OSTI)

The performance of undulator radiation (UR) at CEBAF with a 3.5 m helical undulator is evaluated and compared with APS undulator-A radiation in terms of brilliance, peak brilliance, spectral flux, flux density and intensity distribution.

Chuyu Liu, Geoffrey Krafft, Guimei Wang

2010-05-01T23:59:59.000Z

27

PERFORMANCE OF THE DIAGNOSTICS FOR NSLS-II LINAC COMMISSIONING  

Science Conference Proceedings (OSTI)

The National Synchrotron Light Source II (NSLS-II) is a state of the art 3-GeV third generation light source currently under construction at Brookhaven National Laboratory. The NSLS-II injection system consists of a 200 MeV linac, a 3-GeV booster synchrotron and associated transfer lines. The transfer lines not only provide a means to deliver the beam from one machine to another, they also provide a suite of diagnostics and utilities to measure the properties of the beam to be delivered. In this paper we discuss the suite of diagnostics that will be used to commission the NSLS-II linac and measure the beam properties. The linac to booster transfer line can measure the linac emittance with a three screens measurement or a quadrupole scan. Energy and energy spread are measured in a dispersive section. Total charge and charge uniformity are measured with wall current monitors in the linac and transformers in the transfer line. We show that the performance of the diagnostics in the transfer line will be sufficient to ensure the linac meets its specifications and provides a means of trouble shooting and studying the linac in future operation.

Fliller III, R.; Padrazo, D.; Wang, G.M.; Heese, R.; Hseuh H.-C.; Johanson, M.; Kosciuk, B.N.; Pinayev, I.; Rose, J.; Shaftan, T.; Singh, O.

2011-03-28T23:59:59.000Z

28

Evaluation of high-performance computing software  

Science Conference Proceedings (OSTI)

The absence of unbiased and up to date comparative evaluations of high-performance computing software complicates a user`s search for the appropriate software package. The National HPCC Software Exchange (NHSE) is attacking this problem using an approach that includes independent evaluations of software, incorporation of author and user feedback into the evaluations, and Web access to the evaluations. We are applying this approach to the Parallel Tools Library (PTLIB), a new software repository for parallel systems software and tools, and HPC-Netlib, a high performance branch of the Netlib mathematical software repository. Updating the evaluations with feed-back and making it available via the Web helps ensure accuracy and timeliness, and using independent reviewers produces unbiased comparative evaluations difficult to find elsewhere.

Browne, S.; Dongarra, J. [Univ. of Tennessee, Knoxville, TN (United States); Rowan, T. [Oak Ridge National Lab., TN (United States)

1996-12-31T23:59:59.000Z

29

Performance evaluation of robotic knowledge representation (PERK)  

Science Conference Proceedings (OSTI)

In this paper, we explore some ways in which symbolic knowledge representations have been evaluated in the past and provide some thoughts on what should be considered when applying and evaluating these types of knowledge representations for real-time ... Keywords: knowledge representation, ontologies, performance metrics, real-time, robotics

Craig Schlenoff; Sebti Foufou; Stephen Balakirsky

2012-03-01T23:59:59.000Z

30

Energy Performance Evaluation of Photovoltaic Power Converters  

Science Conference Proceedings (OSTI)

This work investigates test methods to compare the energy performance of different competing photovoltaic (PV) power converter technologies and topologies. New power converter approaches and technology are regularly introduced in the market, with promises to harness more energy than their competitors. To independently evaluate the performance of these technologies, the Electric Power Research Institute (EPRI) is analyzing existing standards, as well as experimenting with various performance ...

2013-12-23T23:59:59.000Z

31

Evaluate reformer performance at a glance  

Science Conference Proceedings (OSTI)

Catalytic reforming is becoming increasingly important in replacing octane lost as the removal of lead from worldwide gasoline pools continues. A method has been developed that can quickly evaluate the performance of any catalytic reformer. The catalytic naphtha reforming process primarily involves three well-known reactions. These are aromatization of naphthenes, cyclization of paraffins and hydrocracking of paraffins. Hydrogen is produced in the process of aromatization and dehydrocyclization of paraffins. Reformer performance is normally evaluated with a reformate analysis (PONA) and yield of C{sub 5{sup +}} reformate. This method of quick evaluation of reformer performance is based upon the main assumption that the increase in hydrocarbon moles in the process is equal to the number of C{single_bond}C bond ruptures and one mole of hydrogen is absorbed to saturate the same. This new method calculates aromatization efficiency, paraffin conversion, aromatic selectivity and finally the paraffin, naphthene and aromatic content of C{sub 5{sup +}} reformate.

Nag, A. [Indian Oil Corporation Ltd., Gujarat (India)

1996-02-01T23:59:59.000Z

32

Smith Newton Vehicle Performance Evaluation (Brochure)  

DOE Green Energy (OSTI)

The Fleet Test and Evaluation Team at the U.S. Department of Energy's National Renewable Energy Laboratory is evaluating and documenting the performance of electric and plug-in hybrid electric drive systems in medium-duty trucks across the nation. Through this project, Smith Electric Vehicles will build and deploy 500 all-electric medium-duty trucks. The trucks will be deployed in diverse climates across the country.

Not Available

2012-08-01T23:59:59.000Z

33

Performance Evaluation and Benchmarking of Intelligent Systems  

Science Conference Proceedings (OSTI)

To design and develop capable, dependable, and affordable intelligent systems, their performance must be measurable. Scientific methodologies for standardization and benchmarking are crucial for quantitatively evaluating the performance of emerging robotic and intelligent systems technologies. There is currently no accepted standard for quantitatively measuring the performance of these systems against user-defined requirements; and furthermore, there is no consensus on what objective evaluation procedures need to be followed to understand the performance of these systems. The lack of reproducible and repeatable test methods has precluded researchers working towards a common goal from exchanging and communicating results, inter-comparing system performance, and leveraging previous work that could otherwise avoid duplication and expedite technology transfer. Currently, this lack of cohesion in the community hinders progress in many domains, such as manufacturing, service, healthcare, and security. By providing the research community with access to standardized tools, reference data sets, and open source libraries of solutions, researchers and consumers will be able to evaluate the cost and benefits associated with intelligent systems and associated technologies. In this vein, the edited book volume addresses performance evaluation and metrics for intelligent systems, in general, while emphasizing the need and solutions for standardized methods. To the knowledge of the editors, there is not a single book on the market that is solely dedicated to the subject of performance evaluation and benchmarking of intelligent systems. Even books that address this topic do so only marginally or are out of date. The research work presented in this volume fills this void by drawing from the experiences and insights of experts gained both through theoretical development and practical implementation of intelligent systems in a variety of diverse application domains. The book presents a detailed and coherent picture of state-of-the-art, recent developments, and further research areas in intelligent systems.

Madhavan, Raj [ORNL; Messina, Elena [National Institute of Standards and Technology (NIST); Tunstel, Edward [JHU Applied Physics Laboratory

2009-09-01T23:59:59.000Z

34

PERFORMANCE EVALUATION AND MEASUREMENT PLAN (PEMP) AWARD FEE PLAN (AFP)  

NLE Websites -- All DOE Office Websites (Extended Search)

- March 2013 Page 1 - March 2013 Page 1 PERFORMANCE EVALUATION AND MEASUREMENT PLAN (PEMP) AWARD FEE PLAN (AFP) 1 OCTOBER 2012 through 30 SEPTEMBER 2013 Contract No. DE- EM-0001971 I. INTRODUCTION This Performance Evaluation and Measurement Plan (PEMP) provides a standard process for development, administration, and coordination of all phases of the fee determination process consistent with Section B.2 of the subject contract. Fee determinations are not subject to the Disputes Clause of the contract. II. ORGANIZATIONAL STRUCTURE AND DUTIES The following organizational structure is established for administering the fee provisions of the contract. A. Roles and Responsibilities 1. Fee Determination Official (FDO) - The Head of Contracting Activity (HCA) has appointed the CBFO Manager as the FDO. The FDO

35

Performance Evaluation of Dense Gas Dispersion Models  

Science Conference Proceedings (OSTI)

This paper summarizes the results of a study to evaluate the performance of seven dense gas dispersion models using data from three field experiments. Two models (DEGADIS and SLAB) are in the public domain and the other five (AIRTOX, CHARM, FOCUS,...

Jawad S. Touma; William M. Cox; Harold Thistle; James G. Zapert

1995-03-01T23:59:59.000Z

36

Evaluating the Performance of Land Surface Models  

Science Conference Proceedings (OSTI)

This paper presents a set of analytical tools to evaluate the performance of three land surface models (LSMs) that are used in global climate models (GCMs). Predictions of the fluxes of sensible heat, latent heat, and net CO2 exchange obtained ...

Gab Abramowitz; Ray Leuning; Martyn Clark; Andy Pitman

2008-11-01T23:59:59.000Z

37

A Performance Evaluation of Text Analysis Technologies  

E-Print Network (OSTI)

This report describes the most recent and most sophisticated of these evaluations, the Third Message Understanding Conference (MUC-3) 1 This evaluation was sponsored by the Defense Research Projects Agency (DARPA), which plays a key role in sponsoring evaluations for other types of language interpretation systems, including performance evaluations for speech recognition carried out by the National Institute of Standards and Technology (Pallett 1990). Background and History In June 1990, a call for participation went out to research laboratories in industry and academia. The intent was to bring together established natural language processing systems for the sake of seeing how they would each handle a uniform text comprehension task. The call emphasized the importance of having a "mature" natural language processing system ready to go. The short time frame associated with MUC-3 was not amenable to extensive system construction or exploratory experimentation on a major scal

By Wendy; Wendy Lehnert; Beth Sundheim

1991-01-01T23:59:59.000Z

38

Performance evaluation soil samples utilizing encapsulation technology  

DOE Patents (OSTI)

Performance evaluation soil samples and method of their preparation are described using encapsulation technology to encapsulate analytes which are introduced into a soil matrix for analysis and evaluation by analytical laboratories. Target analytes are mixed in an appropriate solvent at predetermined concentrations. The mixture is emulsified in a solution of polymeric film forming material. The emulsified solution is polymerized to form microcapsules. The microcapsules are recovered, quantitated and introduced into a soil matrix in a predetermined ratio to form soil samples with the desired analyte concentration.

Dahlgran, James R.

1997-12-01T23:59:59.000Z

39

Performance evaluation soil samples utilizing encapsulation technology  

DOE Patents (OSTI)

Performance evaluation soil samples and method of their preparation uses encapsulation technology to encapsulate analytes which are introduced into a soil matrix for analysis and evaluation by analytical laboratories. Target analytes are mixed in an appropriate solvent at predetermined concentrations. The mixture is emulsified in a solution of polymeric film forming material. The emulsified solution is polymerized to form microcapsules. The microcapsules are recovered, quantitated and introduced into a soil matrix in a predetermined ratio to form soil samples with the desired analyte concentration. 1 fig.

Dahlgran, J.R.

1999-08-17T23:59:59.000Z

40

Performance evaluation soil samples utilizing encapsulation technology  

DOE Patents (OSTI)

Performance evaluation soil samples and method of their preparation using encapsulation technology to encapsulate analytes which are introduced into a soil matrix for analysis and evaluation by analytical laboratories. Target analytes are mixed in an appropriate solvent at predetermined concentrations. The mixture is emulsified in a solution of polymeric film forming material. The emulsified solution is polymerized to form microcapsules. The microcapsules are recovered, quantitated and introduced into a soil matrix in a predetermined ratio to form soil samples with the desired analyte concentration.

Dahlgran, James R. (Idaho Falls, ID)

1999-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ii performance evaluation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Energy-Efficient Office Technologies Performance Evaluation  

Science Conference Proceedings (OSTI)

In response to the significant electrical end use of commercial office equipment, the U.S. EPA, with help from EPRI and member utilities, began the Energy Star program, which created energy efficiency standards for computers (CPUs), monitors, printers, copiers, fax machines, and controlling devices. This report describes methods for evaluating the performance of office equipment, typical load shapes for a variety of office equipment, and the results of field monitoring. Such information will help utility...

1997-04-28T23:59:59.000Z

42

Performance Evaluation of the Engineered Cover at the Lakeview...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

here Home Performance Evaluation of the Engineered Cover at the Lakeview, Oregon, Uranium Mill Tailings Site Performance Evaluation of the Engineered Cover at the Lakeview,...

43

Performance Evaluation of Energy Consumption in MANETs  

E-Print Network (OSTI)

The mobility of nodes in MANET may result in dynamic topology with high rate of link breakage and network partitions leading to interruption in communication and packet loss. Many routing protocols have been proposed in the literature with different characteristics and properties. The routing protocols suffer from various overheads causing energy loss which is further aggravated by link breaks. The present work concentrate on the energy consumption issues of routing protocols. We have evaluated the performance of DSDV, DSR and AODV routing protocols with respect to energy consumption indicating their usage of node’s energy.

Ashish Kumar; M. Q. Rafiq; Kamal Bansal

2012-01-01T23:59:59.000Z

44

Performance Evaluation of Phasor Measurement Systems  

Science Conference Proceedings (OSTI)

After two decades of phasor network deployment, phasor measurements are now available at many major substations and power plants. The North American SynchroPhasor Initiative (NASPI), supported by both the US Department of Energy and the North American Electricity Reliability Council (NERC), provides a forum to facilitate the efforts in phasor technology in North America. Phasor applications have been explored and some are in today’s utility practice. IEEE C37.118 Standard is a milestone in standardizing phasor measurements and defining performance requirements. To comply with IEEE C37.118 and to better understand the impact of phasor quality on applications, the NASPI Performance and Standards Task Team (PSTT) initiated and accomplished the development of two important documents to address characterization of PMUs and instrumentation channels, which leverage prior work (esp. in WECC) and international experience. This paper summarizes the accomplished PSTT work and presents the methods for phasor measurement evaluation.

Huang, Zhenyu; Kasztenny, Bogdan; Madani, Vahid; Martin, Kenneth E.; Meliopoulos, Sakis; Novosel, Damir; Stenbakken, Jerry

2008-07-20T23:59:59.000Z

45

Yakima River Basin Phase II Fish Screen Evaluations, 2002  

DOE Green Energy (OSTI)

In 2002, the Pacific Northwest National Laboratory evaluated 23 Phase II fish screen sites in the Yakima River Basin as part of a multi-year project for the Bonneville Power Administration on the effectiveness of fish screening devices. Pacific Northwest National Laboratory collected data to determine whether velocities in front of the screens and in the bypasses met National Marine Fisheries Service criteria to promote safe and timely fish passage and whether bypass outfall conditions allowed fish to safely return to the river. In addition, Pacific Northwest National Laboratory conducted underwater video surveys to evaluate the environmental and operational conditions of the screen sites with respect to fish passage. Based on evaluations in 2002, PNNL concluded that: (1) In general, water velocity conditions at the screen sites met fish passage criteria set by the National Marine Fisheries Service. (2) Conditions at most facilities would be expected to provide for safe juvenile fish passage. (3) Conditions at some facilities indicate that operation and/or maintenance should be modified to increase safe juvenile fish passage. (4) Automated cleaning brushes generally functioned properly; chains and other moving parts were typically well greased and operative. (5) Removal of sediment buildup and accumulated leafy and woody debris should be improved at some sites.

Carter, Jessica A.; McMichael, Geoffrey A.; Chamness, Mickie A.

2003-03-01T23:59:59.000Z

46

Yakima River Basin Phase II Fish Screen Evaluations, 2003  

DOE Green Energy (OSTI)

In 2003, the Pacific Northwest National Laboratory (PNNL) evaluated 23 Phase II fish screen sites in the Yakima River Basin as part of a multi-year project for the Bonneville Power Administration on the effectiveness of fish screening devices. PNNL collected data to determine whether velocities in front of the screens and in the bypasses met the Nation Oceanic and Atmospheric Administration Fisheries (NOAA Fisheries, formerly the National Marine Fisheries Service (NMFS)) criteria to promote safe and timely fish passage. In addition, PNNL conducted underwater video surveys to evaluate the environmental and operational conditions of the screen sites with respect to fish passage. Based on evaluations in 2003, PNNL concluded that: (1) In general, water velocity conditions at the screen sites met fish passage criteria set by the National Oceanic and Atmospheric Administration Fisheries. (2) Conditions at most facilities would be expected to provide for safe juvenile fish passage. (3) Conditions at some facilities indicate that operation and/or maintenance should be modified to improve juvenile fish passage conditions. (4) Automated cleaning brushes generally functioned properly; chains and other moving parts were typically well greased and operative. (5) Removal of sediment buildup and accumulated leafy and woody debris could be improved at some sites.

Vucelick, Jessica A.; McMichael, Geoffrey A.; Chamness, Mickie A.

2004-05-01T23:59:59.000Z

47

Houston LDAR II network: design, operation, and performance analysis  

E-Print Network (OSTI)

The Houston LDAR II network is an array of twelve VHF time-of-arrival (TOA) sensors operated by Texas A&M University. The goals of the network are to conduct indepth studies of thunderstorm electrification and provide timely lightning threats to the Houston area. Before analyses are conducted using data from the Houston LDAR network, it is necessary to understand the LDAR networkâ s performance and limitations, such as the LDAR source detection efficiency, network range, and location accuracy. Initial results from the 31 October 2005 Mesoscale Convective System (MCS) timing error analysis revealed an RMS timing error for the Houston LDAR network of 90 ns for 6 sensor solutions. This gives a three-dimensional location accuracy of 1 km at a distance of 150 km and 100 m over the center of the network. Reanalysis with updated sensor positions decreased the RMS timing error to 75 ns. This decrease in RMS timing error increased the median three-dimensional location accuracy by ~100 m at a 100 km range. The network has been operated at both 70 MHz and 40 MHz. Model results of detection efficiency suggest that the change to 40 MHz yields an increase of 9 - 10 dB in network sensitivity. Analysis of VHF source power distributions shows a similar shift from that expected from the model. These results show that the 40 MHz LDAR network detects ~3.3 times more VHF sources than the 70 MHz network. The analysis of the usable network range for research purposes is currently set by rough guidelines of location accuracy and detection efficiency. For location accuracy, a 1 km limit allows storm analysis out to a range of more than 150 km. For the detection efficiency analysis, results based on source power distributions suggest a gradual fall off with range. Examining the change in VHF source density by range reveals different results. VHF source density remained fairly constant out to a range of 100 km at which point a significant fall off was observed. Based on these results the usable network range for the Houston network is 100 km.

Ely, Brandon Lee

2008-08-01T23:59:59.000Z

48

Wind Tunnel Evaluation of PAM II Pressure Ports  

Science Conference Proceedings (OSTI)

The Portable Automated Mesonet II (PAM II) is a network of automated remote weather stations developed by the National Center for Atmospheric Research (NCAR) for measuring wind speed and direction, atmospheric pressure, temperature, humidity, and ...

Fikri Adnan Akyüz; Henry Liu; Tom Horst

1991-06-01T23:59:59.000Z

49

A Performance Evaluation of Text Analysis Technologies  

E-Print Network (OSTI)

This report describes the most recent and most sophisticated of these evaluations, the Third Message Understanding Conference (MUC-3)

By Wendy Lehnert; Wendy Lehnert; Beth Sundheim

1991-01-01T23:59:59.000Z

50

National solar data program performance results, Volume II  

Science Conference Proceedings (OSTI)

Separate abstracts were prepared for the seven included papers on performance of solar heating systems.

Not Available

1981-01-01T23:59:59.000Z

51

Evaluation of the Fenton Hill Hot Dry Rock Geothermal Reservoir. Part I. Heat extraction performance and modeling. Part II. Flow characteristics and geochemistry. Part III. Reservoir characterization using acoustic techniques  

DOE Green Energy (OSTI)

On May 28, 1977, as the production well GT-2 at Fenton Hill was being redrilled along a planned trajectory, it intersected a low-impedance hydraulic fracture in direct communication with the injection well, EE-1. Thus, a necessary prerequisite for a full-scale test of the LASL Hot Dry Rock Concept, that of establishing a high flow rate between wells at low wellhead differential pressures, was satisified. Full-scale operation of the loop occurred for 75 days from January 27 to April 12, 1978. This test is referred to as Phase 1, Segment 2 and was designed to examine the thermal drawdown, flow characteristics, water losses, and fluid geochemistry of the system in detail. Results of these studies are the major topic of this paper which is divided into three separate parts covering first the heat extraction performance, second the flow characteristics and geochemistry and third the use of acoustic techniques to describe the geometry of the fracture system. In the third section, dual-well acoustic measurements used to detect fractures are described. These measurements were made using modified Dresser Atlas logging tools. Signals intersecting hydraulic fractures in the reservoir under both hydrostatic and pressurized conditions were simultaneously detected in both wells. Signal attenuation and characteristic waveforms can be used to describe the extent of fractured rock in the reservoir.

Murphy, H.D.; Grigsby, C.O.; Tester, J.W.; Albright, J.N.

1978-01-01T23:59:59.000Z

52

SERVER DEVELOPMENT FOR NSLS-II PHYSICS APPLICATIONS AND PERFORMANCE ANALYSIS  

SciTech Connect

The beam commissioning software framework of NSLS-II project adopts a client/server based architecture to replace the more traditional monolithic high level application approach. The server software under development is available via an open source sourceforge project named epics-pvdata, which consists of modules pvData, pvAccess, pvIOC, and pvService. Examples of two services that already exist in the pvService module are itemFinder, and gather. Each service uses pvData to store in-memory transient data, pvService to transfer data over the network, and pvIOC as the service engine. The performance benchmarking for pvAccess and both gather service and item finder service are presented in this paper. The performance comparison between pvAccess and Channel Access are presented also. For an ultra low emittance synchrotron radiation light source like NSLS II, the control system requirements, especially for beam control are tight. To control and manipulate the beam effectively, a use case study has been performed to satisfy the requirement and theoretical evaluation has been performed. The analysis shows that model based control is indispensable for beam commissioning and routine operation. However, there are many challenges such as how to re-use a design model for on-line model based control, and how to combine the numerical methods for modeling of a realistic lattice with the analytical techniques for analysis of its properties. To satisfy the requirements and challenges, adequate system architecture for the software framework for beam commissioning and operation is critical. The existing traditional approaches are self-consistent, and monolithic. Some of them have adopted a concept of middle layer to separate low level hardware processing from numerical algorithm computing, physics modelling, data manipulating and plotting, and error handling. However, none of the existing approaches can satisfy the requirement. A new design has been proposed by introducing service oriented architecture technology, and client interface is undergoing. The design and implementation adopted a new EPICS implementation, namely epics-pvdata [9], which is under active development. The implementation of this project under Java is close to stable, and binding to other language such as C++ and/or Python is undergoing. In this paper, we focus on the performance benchmarking and comparison for pvAccess and Channel Access, the performance evaluation for 2 services, gather and item finder respectively.

Shen, G.; Kraimer, M.

2011-03-28T23:59:59.000Z

53

Preliminary evaluation of alternative waste form solidification processes. Volume II. Evaluation of the processes  

Science Conference Proceedings (OSTI)

This Volume II presents engineering feasibility evaluations of the eleven processes for solidification of nuclear high-level liquid wastes (HHLW) described in Volume I of this report. Each evaluation was based in a systematic assessment of the process in respect to six principal evaluation criteria: complexity of process; state of development; safety; process requirements; development work required; and facility requirements. The principal criteria were further subdivided into a total of 22 subcriteria, each of which was assigned a weight. Each process was then assigned a figure of merit, on a scale of 1 to 10, for each of the subcriteria. A total rating was obtained for each process by summing the products of the subcriteria ratings and the subcriteria weights. The evaluations were based on the process descriptions presented in Volume I of this report, supplemented by information obtained from the literature, including publications by the originators of the various processes. Waste form properties were, in general, not evaluated. This document describes the approach which was taken, the developent and application of the rating criteria and subcriteria, and the evaluation results. A series of appendices set forth summary descriptions of the processes and the ratings, together with the complete numerical ratings assigned; two appendices present further technical details on the rating process.

Not Available

1980-08-01T23:59:59.000Z

54

Oil Bypass Filter Technology Performance Evaluation - First Quarterly...  

NLE Websites -- All DOE Office Websites (Extended Search)

INEELEXT-03-00129 U.S. Department of Energy FreedomCAR & Vehicle Technologies Oil Bypass Filter Technology Performance Evaluation First Quarterly Report Larry Zirker James...

55

Evaluation and performance prediction of cooling tower rain zones.  

E-Print Network (OSTI)

??Cooling tower rain zone performance characteristics such as the loss coefficient and the Merkel number are evaluated and simulated. To this end the influence of… (more)

Pierce, Darren John

2007-01-01T23:59:59.000Z

56

Evaluation of RADAP II Severe-Storm-Detection Algorithms  

Science Conference Proceedings (OSTI)

Computer-generated volumetric radar algorithms have been available at a few operational National Weather Service sites since the mid-1970s under the Digitized Radar Experiment (D/RADFX) and Radar Data Processor (RADAP II) programs. The algorithms ...

Herb A. Winston; Larry J. Ruthi

1986-02-01T23:59:59.000Z

57

Commercial Building Performance Monitoring and Evaluation | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Research Projects » Commercial Building Research Projects » Commercial Building Performance Monitoring and Evaluation Commercial Building Performance Monitoring and Evaluation The Building Technologies Office (BTO) uses performance metrics to standardize the measurement and characterization of energy performance in commercial buildings. These metrics help inform the effectiveness of energy efficiency measures in existing buildings and highlight opportunities to improve performance. Various tiers of metrics are available for different users. Performance Metrics Objectives Performance metrics deal with building energy consumption and on-site energy production. To be useful, industry must agree on standard definitions for these metrics and share consistent procedures for collecting and reporting data as well as ensuring data quality.

58

NNSA Strategic Performance Evaluation Plan (PEP) FOR  

National Nuclear Security Administration (NNSA)

Management and Operation of the Management and Operation of the Babcock and Wilcox Technical Services Y-12, LLC Contract Number: DE-ACOS-OOOR22800 Performance period: October 01, 2012 through September 30, 2013 . Spencer Date President and General Manager Babcock & Wilcox Technical Services Y-12, LLC jO/~ nag , Contracts & Special Initiatives ck & Wilcox Technical Services Y -12, LLC National Nuclear Security Administration INTRODUCTION Y-12 National Security Complex is managed by Babcock & Wilcox Technical Services Y-12, LLC, herein referenced as "Contractor", for the U.S. Department of Energy (DOE), National Nuclear Security Administration (NNSA). Pursuant to the terms and conditions of the Contract, and Clause 1.154 DEAR 970.5215-1 Total Available Fee: Base Fee Amount and Performance

59

Performance evaluation of the Balcomb solar house  

DOE Green Energy (OSTI)

Additional instrumentation was added to the Balcomb solar house for a six-week period and up to 85 channels were recorded hourly. Some new findings based on an evaluation of these data are presented. (1) The thermal comfort characteristics of four rooms are documented. (2) Relative humidity in the living room varies from 30 to 50%; these data are used to infer an evaporation rate in the house of about 25 kg of water/day. The evaporation rate correlates reasonably well with greenhouse temperature. (3) Heat storage in the greenhouse floor is estimated at about 0.30 kWh/day-m/sup 2/ based on temperatures measured at four depths. (4) Several thermal characteristics of the rock bed are deduced but it is evident that the heat flow is not yet completely understood.

Balcomb, J.D.; Hedstrom, J.C.; Perry, J.E. Jr.

1980-01-01T23:59:59.000Z

60

A Novel Thermodynamic Performance Evaluation Method for Trigeneration System  

Science Conference Proceedings (OSTI)

To get reasonable and reliable index of performance of combined cooling, heating and power (CCHP) system, a new performance evaluation method of the system, the comprehensive efficiency, is proposed. The method is based on energy, exergy and anergy analyses. ... Keywords: trigeneration, evaluation method, energy grade factor, anergy's equivalent available coefficient, energy, exergy

Ge Bin; Zhang Junli

2011-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "ii performance evaluation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Performance evaluation of corner detectors using consistency and accuracy measures  

Science Conference Proceedings (OSTI)

This paper evaluates the performance of several popular corner detectors using two newly defined criteria. The majority of authors of published corner detectors have not used theoretical criteria to measure the consistency and accuracy of their algorithms. ... Keywords: Accuracy, CSS, Consistency, Corner detection, Performance evaluation

Farzin Mokhtarian; Farahnaz Mohanna

2006-04-01T23:59:59.000Z

62

Spatial Dispersion and Performance Evaluation of  

E-Print Network (OSTI)

Channel capacity of a MIMO system is dependent not only on the signal-to-noise ratio (SNR) but also on spatial correlation among antenna elements. Therefore, the system design must rely on good propagation predictions. By using a ray tracing simulator, which considers reflections, penetrations and diffractions in 3-D space, we predict channel properties and evaluate capacity of 4 4 indoor MIMO channels for both line-of-sight (LOS) and non-line-of-sight (NLOS) cases. Before extensive simulations, the predictions of the simulator are verified by comparing results of wideband channel measurement and simulation. The comparison shows that path loss and RMS delay spread can be well predicted by simulation. Based on simulated results, we investigate the spatial dispersion of the channel and its impact on channel capacity. Data analysis shows that spatial dispersion can be better characterized by using both the azimuth spread and elevation spread than by only one of them. Moreover, the reduced capacity in the NLOS region due to lower signalto -noise can be partially compensated by an increase in capacity due to lower signal correlation.

Indoor Mimo Channels; Haibing Yang; Matti H. A. J. Herben

2004-01-01T23:59:59.000Z

63

Performance Evaluation Erich Strohmaier, Lawrence Berkeley National Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

Computer Science & Computer Science & Performance Evaluation Erich Strohmaier, Lawrence Berkeley National Laboratory Large Scale Computing and Storage Requirements for Advanced Scientific Computing Research ASCR / NERSC Workshop January 5-6, 2011 Some Current Projects * UPC, CAF and Titanium - And hybrids of these with others (MPI) * Performance Characterization and Benchmarking of HPC Systems (Apex-MAP) - Synthetic parameterized performance probes * The Performance Engineering Research Institute (PERI) - Application centric performance engineering * Developing and optimizing new algorithms - Cache - Math/CS Institute * (Evaluation of) of new and of hybrid programming models * Various other benchmarking, auto-tuning, and application optimization studies

64

Evaluating Parameter Sweep Workflows in High Performance Computing*  

E-Print Network (OSTI)

Evaluating Parameter Sweep Workflows in High Performance Computing* Fernando Chirigati1,# , Vítor a large amount of tasks that are submitted to High Performance Computing (HPC) environments. Different, Parameter Sweep, High Performance Computing (HPC) 1. INTRODUCTION1 # Many scientific experiments are based

Paris-Sud XI, Université de

65

Project on restaurant energy performance: end-use monitoring and analysis. Appendixes I and II  

Science Conference Proceedings (OSTI)

This is the second volume of the report, ''The Porject on Restaurant Energy Performance - End-Use Monitoring and Analysis''. The first volume (PNL-5462) contains a summary and analysis of the metered energy performance data collected by the Project on Restaurant Energy Performance (PREP). Appendix I, presented here, contains monitoring site descriptions, measurement plans, and data summaries for the seven restaurants metered for PREP. Appendix II, also in this volume, is a description of the PREP computer system.

Claar, C.N.; Mazzucchi, R.P.; Heidell, J.A.

1985-05-01T23:59:59.000Z

66

Fiscal year 1999 Battelle performance evaluation and fee agreement  

SciTech Connect

Fiscal Year 1999 represents the third fill year utilizing a results-oriented, performance-based evaluation for the Contractor's operations and management of the DOE Pacific Northwest National Laboratory (here after referred to as the Laboratory). However, this is the first year that the Contractor's fee is totally performance-based utilizing the same Critical Outcomes. This document describes the critical outcomes, objectives, performance indicators, expected levels of performance, and the basis for the evaluation of the Contractor's performance for the period October 1, 1998 through September 30, 1999, as required by Clauses entitled ''Use of Objective Standards of Performance, Self Assessment and Performance Evaluation'' and ''Performance Measures Review'' of the Contract DE-ACO6-76RL01830. Furthermore, it documents the distribution of the total available performance-based fee and the methodology set for determining the amount of fee earned by the Contractor as stipulated within the causes entitled ''Estimated Cost and Annual Fee,'' ''Total Available Fee'' and ''Allowable Costs and Fee.'' In partnership with the Contractor and other key customers, the Department of Energy (DOE) Headquarters (HQ) and Richland Operations Office (RL) has defined four critical outcomes that serve as the core for the Contractor's performance-based evaluation and fee determination. The Contractor also utilizes these outcomes as a basis for overall management of the Laboratory.

DAVIS, T.L.

1998-10-22T23:59:59.000Z

67

On Combining Functional Verification and Performance Evaluation Using CADP  

Science Conference Proceedings (OSTI)

Considering functional correctness and performance evaluation in a common framework is desirable, both for scientific and economic reasons. In this paper, we describe how the CADP toolbox, originally designed for verifying the functional correctness ...

Hubert Garavel; Holger Hermanns

2002-07-01T23:59:59.000Z

68

RSF Workshop Session II: Performance-Based Design-Build Process  

NLE Websites -- All DOE Office Websites (Extended Search)

II: Performance-Based Design-Build II: Performance-Based Design-Build Process Moderator: Drew Detamore Panelists: Jeff Baker Karen Leitner Byron Haselden Achieving Superior Energy Performance at Competitive Cost RSF Workshop, Golden, Colorado July 27-28, 2011 Energy Efficiency & Renewable Energy *Moderator: *Drew Detamore Director, Infrastructure and Campus Development Office National Renewable Energy Laboratory *Panelists: *Karen Leitner Senior Supervisor, Contract and Business Services National Renewable Energy Laboratory *Byron J. Haselden President, Haselden Construction *Jeffrey M. Baker Director, Office of Laboratory Operations U.S. Department of Energy Golden Field Office * Performance based design-build process * Incentives * Shared Values * Owner's perspective * Design-Builder's perspective * Has anyone ever utilized one design-build team to

69

Thermal Performance Engineering Handbook, Volume II: Advanced Concepts in Thermal Performance  

Science Conference Proceedings (OSTI)

The two-volume Thermal Performance Engineering Handbook will assist thermal performance engineers in identifying and investigating the cause of megawatt (MWe) losses as well as in proposing new ways to increase MWe output. Volume I contains a thermal performance primer to provide a brief review of thermodynamic principles involved in the steam power plant thermal cycle. The primer also contains brief descriptions of the equipment and systems in the cycle that can be sources of thermal losses. Also in Vol...

1998-10-29T23:59:59.000Z

70

EBR-II Primary Tank Wash-Water Alternatives Evaluation  

Science Conference Proceedings (OSTI)

The EBR-II reactor at Idaho National Laboratory was a liquid sodium metal cooled reactor that operated for 30 years. It was shut down in 1994; the fuel was removed by 1996; and the bulk of sodium metal coolant was removed from the reactor by 2001. Approximately 1100 kg of residual sodium remained in the primary system after draining the bulk sodium. To stabilize the remaining sodium, both the primary and secondary systems were treated with a purge of moist carbon dioxide. Most of the residual sodium reacted with the carbon dioxide and water vapor to form a passivation layer of primarily sodium bicarbonate. The passivation treatment was stopped in 2005 and the primary system is maintained under a blanket of dry carbon dioxide. Approximately 670 kg of sodium metal remains in the primary system in locations that were inaccessible to passivation treatment or in pools of sodium that were too deep for complete penetration of the passivation treatment. The EBR-II reactor was permitted by the Idaho Department of Environmental Quality (DEQ) in 2002 under a RCRA permit that requires removal of all remaining sodium in the primary and secondary systems by 2022. The proposed baseline closure method would remove the large components from the primary tank, fill the primary system with water, react the remaining sodium with the water and dissolve the reaction products in the wash water. This method would generate a minimum of 100,000 gallons of caustic, liquid, low level radioactive, hazardous waste water that must be disposed of in a permitted facility. On February 19-20, 2008, a workshop was held in Idaho Falls, Idaho, to look at alternatives that could meet the RCRA permit clean closure requirements and minimize the quantity of hazardous waste generated by the cleanup process. The workshop convened a panel of national and international sodium cleanup specialists, subject matter experts from the INL, and the EBR-II Wash Water Project team that organized the workshop. The workshop was conducted by a trained facilitator using Value Engineering techniques to elicit the most technically sound solutions from the workshop participants. The path forward includes developing the OBA into a well engineered solution for achieving RCRA clean closure of the EBR-II Primary Reactor Tank system. Several high level tasks are also part of the path forward such as reassigning responsibility of the cleanup project to a dedicated project team that is funded by the DOE Office of Environmental Management, and making it a priority so that adequate funding is available to complete the project. Based on the experience of the sodium cleanup specialists, negotiations with the DEQ will be necessary to determine a risk-based de minimus quantity for acceptable amount of sodium that can be left in the reactor systems after cleanup has been completed.

Demmer, R. L.; Heintzelman, J. B.; Merservey, R. H.; Squires, L. N.

2008-05-01T23:59:59.000Z

71

Evaluating post-occupancy performance : Daylighting The New York Times  

NLE Websites -- All DOE Office Websites (Extended Search)

Evaluating post-occupancy performance Evaluating post-occupancy performance Overview The architectural approach The owner's approach Daylighting field study Daylighting control systems Automated roller shades Procurement specifications Shades and Shade Controls Lighting Controls Visualizing daylight Commissioning/ verification Demand response Mainstream solutions Post-occupancy evaluation Publications Sponsors Project team Evaluating post-occupancy performance "We aggressively pursued innovative designs to improve the quality of the workplace for our employees and to reduce energy use and other operating costs of our facility. The outcomes of this study confirm that we were successful. More importantly, our hope is that the energy efficient measures and designs documented in this independent study may inspire other companies' workplace designs." - Angelo Salvatore, Executive Director of Building Operations, The Times Company.

72

Lighting and Human Performance II: Beyond Visibility Models Toward a Unified Human Factors Approach to Performance  

Science Conference Proceedings (OSTI)

To understand the relationship between lighting conditions and human performance, it is first necessary to identify the routes by which lighting conditions can affect human performance. There are three such routes: the visual system, the circadian photobiological system, and the perceptual system. This report updates and replaces an earlier work and explores the relationship between lighting conditions and the ability to carry out tasks in interiors.

2001-10-29T23:59:59.000Z

73

Seismic design and evaluation criteria based on target performance goals  

SciTech Connect

The Department of Energy utilizes deterministic seismic design/evaluation criteria developed to achieve probabilistic performance goals. These seismic design and evaluation criteria are intended to apply equally to the design of new facilities and to the evaluation of existing facilities. In addition, the criteria are intended to cover design and evaluation of buildings, equipment, piping, and other structures. Four separate sets of seismic design/evaluation criteria have been presented each with a different performance goal. In all these criteria, earthquake loading is selected from seismic hazard curves on a probabilistic basis but seismic response evaluation methods and acceptable behavior limits are deterministic approaches with which design engineers are familiar. For analytical evaluations, conservatism has been introduced through the use of conservative inelastic demand-capacity ratios combined with ductile detailing requirements, through the use of minimum specified material strengths and conservative code capacity equations, and through the use of a seismic scale factor. For evaluation by testing or by experience data, conservatism has been introduced through the use of an increase scale factor which is applied to the prescribed design/evaluation input motion.

Murray, R.C.; Nelson, T.A. [Lawrence Livermore National Lab., CA (United States); Kennedy, R.P. [Structural Mechanics Consulting, Inc., Yorba Linda, CA (United States); Short, S.A. [EQE International, Inc., Irvine, CA (United States)

1994-04-01T23:59:59.000Z

74

Low cost performance evaluation of passive solar buildings  

DOE Green Energy (OSTI)

An approach to low-cost instrumentation and performance evaluation of passive solar heated buildings is presented. Beginning with a statement of the need for a low-cost approach, a minimum list of measured quantities necessary to compute a set of recommended performance factors is developed. Conflicts and confusion surrounding the definition of various performance factors are discussed and suggestions are made for dealing with this situation. Available instrumentation and data processing equipment is presented. The recommended system would monitor approximately ten variables and compute numerous performance factors on site at a projected system cost of less than $3,000 per installation.

Palmiter, L.S.; Hamilton, L.B.; Holtz, M.J.

1979-10-01T23:59:59.000Z

75

Smith Newton Vehicle Performance Evaluation - 3rd Quarter 2012 (Brochure)  

SciTech Connect

The Fleet Test and Evaluation Team at the U.S. Department of Energy's National Renewable Energy Laboratory is evaluating and documenting the performance of electric and plug-in hybrid electric drive systems in medium-duty trucks across the nation. Through this project, Smith Electric Vehicles will build and deploy 500 all-electric medium-duty trucks. The trucks will be deployed in diverse climates across the country.

Not Available

2013-03-01T23:59:59.000Z

76

Lithographic performance evaluation of a contaminated EUV mask after cleaning  

SciTech Connect

The effect of surface contamination and subsequent mask surface cleaning on the lithographic performance of a EUV mask is investigated. SEMATECH's Berkeley micro-field exposure tool (MET) printed 40 nm and 50 nm line and space (L/S) patterns are evaluated to compare the performance of a contaminated and cleaned mask to an uncontaminated mask. Since the two EUV masks have distinct absorber architectures, optical imaging models and aerial image calculations were completed to determine any expected differences in performance. Measured and calculated Bossung curves, process windows, and exposure latitudes for the two sets of L/S patterns are compared to determine how the contamination and cleaning impacts the lithographic performance of EUV masks. The observed differences in mask performance are shown to be insignificant, indicating that the cleaning process did not appreciably affect mask performance.

George, Simi; Naulleau, Patrick; Okoroanyanwu, Uzodinma; Dittmar, Kornelia; Holfeld, Christian; Wuest, Andrea

2009-11-16T23:59:59.000Z

77

Nondestructive Evaluation: EPRI NDE Performance Demonstration Workshop Meeting Notes  

Science Conference Proceedings (OSTI)

The Nondestructive Evaluation: EPRI NDE Performance Demonstration Workshop Meeting Notes contains all of the presentations and technical information presented during the PD Workshop held July 2426, 2006 at Myrtle Beach, South Carolina. The purpose of the workshop was to describe the approaches to NDE Performance Demonstration (PD) taken by each of the major materials Issue Programs (IP), and the status of each programMRP, PDI, SGMP, and BWRVIP and to present various stakeholder perspectives on the topic ...

2006-10-17T23:59:59.000Z

78

Evaluating the performance of passive-solar-heated buildings  

DOE Green Energy (OSTI)

Methods of evaluating the thermal performance of passive-solar buildings are reviewed. Instrumentation and data logging requirements are outlined. Various methodologies that have been used to develop an energy balance for the building and various performance measures are discussed. Methods for quantifying comfort are described. Subsystem and other special-purpose monitoring are briefly reviewed. Summary results are given for 38 buildings that have been monitored.

Balcomb, J.D.

1983-01-01T23:59:59.000Z

79

Evaluation of the Energy Performance of Six High-Performance Buildings: Preprint  

DOE Green Energy (OSTI)

The energy performance of six high-performance buildings around the United States was monitored and evaluated by the NREL. The six buildings include the Visitor Center at Zion National Park, the NREL Thermal Test Facility, the Chesapeake Bay Foundation's Merrill Center, the BigHorn Home Improvement Center, the Cambria Office Building, and the Oberlin College Lewis Center.

Torcellini, P. A.; Pless, S.; Crawley, D. B.

2005-04-01T23:59:59.000Z

80

Performance study of a thermal-envelope house: Phase II. Cooling performance. Final report  

Science Conference Proceedings (OSTI)

The thermal envelope house is shown to perform much better than conventional houses without mechanical refrigeration and better than one would expect from most passively cooled houses in the hot-humid climate of Georgia. Peak temperatures inside the house were 8 to 15/sup 0/F below peak ambient temperatures. Peak inside temperature measured during the test period was 80/sup 0/F with an outside ambient peak of 93/sup 0/F. Air flow rates within the envelope were less than 1 ft/sec even when the attic fan was operating. The earth cooling tubes provided noticeable sensible cooling to the house. Exit temperatures from the cooling tubes were between 72 to 76/sup 0/F, depending upon the air velocity through the tubes. The thermal chimney performed poorly as an air mover, especially when used to induce flow through the earth cooling tubes. The performance of the earth cooling tube could be improved by using the attic fan to increase the air flow through the cooling tubes and to insure it flowed in the cooling tube, through the envelope and out the thermal chimney. Being an exhaust fan, the attic fan created a negative pressure in the house. While this increased air flow through the cooling tubes, it also increased air infiltration through the building shell, thus increasing load. The humidity level within the living space remains relatively high year-round due to low rates of air infiltration and water vapor transmission through the building skin. The problem is aggravated during the summer by the introduction of cool moist air from the cooling tubes to the envelope and frequently to the inner space. While the cooling tubes are able to reduce the sensible load, and they are incapable of significantly reducing humidity or latent loads. This results in relatively comfortable air temperatures but uncomfortable humidities within the living space.

Akridge, J.M.; Benton, C.C.

1981-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ii performance evaluation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Evaluation of line focus solar central power systems. Volume II. Systems evaluation  

DOE Green Energy (OSTI)

An evaluation was completed to ascertain the applicability of line focus technologies to electrical power applications and to compare their performance and cost potential with point focus central receiver power systems. It was concluded that although the high temperature line focus (SRI) and fixed mirror line focus (GA) concepts duplicate the heat source characteristics and power conversion technology of the central receiver concepts these configurations do not offer a sufficient improvement in cost to warrant full scale development. The systems are, however, less complex than their point focus counterpart and should the central receiver system development falter they provide reasonable technology alternatives. The parabolic trough concept (BDM) was found to provide a low temperature technology alternative to the central receiver concept with promising performance and cost potential. Its continued development is recommended, with special emphasis on lower temperature (< 700/sup 0/F) applications. Finally, a variety of new promising line focus power system configurations were identified for a range of utility and industrial applications and recommendations were made on their implementation. This volume contains the detailed report. (WHK)

Not Available

1980-03-15T23:59:59.000Z

82

A Performance Modeling and Evaluation of the Cambridge Fast Ring  

Science Conference Proceedings (OSTI)

Performance of the Cambridge Fast Ring (CFR), a high-speed slotted ring with normal slots, is studied. It is shown that the CFR can be represented by a multiqueue multiple cyclic server model with a 1-limited service discipline and with a restriction ... Keywords: 1-limited service discipline, Cambridge Fast Ring, approximate analytic M/G/1 vacation model, exact necessary and sufficient stability conditions, high-speed slotted ring, local area networks, message waiting times, multiqueue multiple cyclic server model, normal slots, performance evaluation, performance modeling, queueing theory., vacation period

Mirjana Zafirovic-Vukotic; Ignas G. Niemegeers

1992-09-01T23:59:59.000Z

83

Evaluation of GPFS Connectivity Over High-Performance Networks  

Science Conference Proceedings (OSTI)

We present the results of an evaluation of new features of the latest release of IBM's GPFS filesystem (v3.2). We investigate different ways of connecting to a high-performance GPFS filesystem from a remote cluster using Infiniband (IB) and 10 Gigabit Ethernet. We also examine the performance of the GPFS filesystem with both serial and parallel I/O. Finally, we also present our recommendations for effective ways of utilizing high-bandwidth networks for high-performance I/O to parallel file systems.

Srinivasan, Jay; Canon, Shane; Andrews, Matthew

2009-02-17T23:59:59.000Z

84

Level-crossing ADC performance evaluation toward ultrasound application  

Science Conference Proceedings (OSTI)

A performance evaluation of a level-crossing analog-to-digital converter (ADC) is presented. It is shown that its signal-to-noise ratio (SNR) does not depend on the input-signal amplitude, which results in an almost-flat SNR for amplitudes that fall ... Keywords: irregular sampling, level-crossing analog-to-digital converter (ADC), simulation

Kirill Kozmin; Jonny Johansson; Jerker Delsing

2009-08-01T23:59:59.000Z

85

Tree Rerooting in Distributed Garbage Collection: Implementation and Performance Evaluation  

Science Conference Proceedings (OSTI)

We have recently defined a new algorithm for distributed garbage collection based on reference-counting (Luc Moreau, in Proceedings of the Third International Conference of Functional Programming (ICFP'98), Sept. 1998, pp. 204–215; ... Keywords: benchmark, distributed garbage collection, distributed reference counting, performance evaluation

Luc Moreau

2001-12-01T23:59:59.000Z

86

Performance evaluation of Atomic Commit Protocols for mobile transactions  

Science Conference Proceedings (OSTI)

The commitment of a distributed transaction is ensured with the use of an Atomic Commit Protocol (ACP). Due to their great importance for transaction systems, the recent advances in mobile computing development have renewed the interest in the ... Keywords: atomic commit protocols, mobile ACPs, mobile databases, mobile networks, mobile transaction processing, performance evaluation, simulation, wireless networks

Nadia Nouali-Taboudjemat; Lynda Boukantar; Habiba Drias

2007-08-01T23:59:59.000Z

87

EVALUATION OF THE FINAL REPORT: WASTE PACKAGE MATERIALS PERFORMANCE PEER  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

EVALUATION OF THE FINAL REPORT: WASTE EVALUATION OF THE FINAL REPORT: WASTE PACKAGE MATERIALS PERFORMANCE PEER REVIEW PANEL B00000000-01717-5700-00005 REV 00 August 2002 This document is not an official copy and is for informational purposes only. QA: QA B00000000-01717-5700-00005 REV 00 August 2002 Evaluation of the Final Report: Waste Package Materials Performance Peer Review Panel Prepared by: Jack N. Bailey, Jack D. Cloud, Thomas E. Rodgers, and Tammy S.E. Summers Prepared for: U.S. Department of Energy Yucca Mountain Site Characterization Office P.O. Box 364629 North Las Vegas, Nevada 89036-8629 Prepared by: Bechtel SAIC Company, LLC 1180 Town Center Drive Las Vegas, Nevada 89144 Under Contract Number DE-AC28-01RW12101 Disclaimer Signature Page Change History Acknowledgments

88

Analysis of Photovoltaic System Energy Performance Evaluation Method  

SciTech Connect

Documentation of the energy yield of a large photovoltaic (PV) system over a substantial period can be useful to measure a performance guarantee, as an assessment of the health of the system, for verification of a performance model to then be applied to a new system, or for a variety of other purposes. Although the measurement of this performance metric might appear to be straight forward, there are a number of subtleties associated with variations in weather and imperfect data collection that complicate the determination and data analysis. A performance assessment is most valuable when it is completed with a very low uncertainty and when the subtleties are systematically addressed, yet currently no standard exists to guide this process. This report summarizes a draft methodology for an Energy Performance Evaluation Method, the philosophy behind the draft method, and the lessons that were learned by implementing the method.

Kurtz, S.; Newmiller, J.; Kimber, A.; Flottemesch, R.; Riley, E.; Dierauf, T.; McKee, J.; Krishnani, P.

2013-11-01T23:59:59.000Z

89

Instrumentation for Evaluating PV System Performance Losses from Snow  

DOE Green Energy (OSTI)

When designing a photovoltaic (PV) system for northern climates, the prospective installation should be evaluated with respect to the potentially detrimental effects of snow preventing solar radiation from reaching the PV cells. The extent to which snow impacts performance is difficult to determine because snow events also increase the uncertainty of the solar radiation measurement, and the presence of snow needs to be distinguished from other events that can affect performance. This paper describes two instruments useful for evaluating PV system performance losses from the presence of snow: (1) a pyranometer with a heater to prevent buildup of ice and snow, and (2) a digital camera for remote retrieval of images to determine the presence of snow on the PV array.

Marion, B.; Rodriguez, J.; Pruett, J.

2009-01-01T23:59:59.000Z

90

Laboratory Performance Evaluation of Residential Integrated Heat Pump Water Heaters  

NLE Websites -- All DOE Office Websites (Extended Search)

Performance Performance Evaluation of Residential Integrated Heat Pump Water Heaters B. Sparn, K. Hudon, and D. Christensen Technical Report NREL/TP-5500-52635 September 2011 NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency & Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. National Renewable Energy Laboratory 1617 Cole Boulevard Golden, Colorado 80401 303-275-3000 * www.nrel.gov Contract No. DE-AC36-08GO28308 Laboratory Performance Evaluation of Residential Integrated Heat Pump Water Heaters B. Sparn, K. Hudon, and D. Christensen Prepared under Task Nos. WTN9.1000, ARRB.2204 Technical Report NREL/TP-5500-52635 September 2011 NOTICE This report was prepared as an account of work sponsored by an agency of the United States government.

91

Washington Phase II Fish Diversion Screen Evaluations in the Yakima River Basin, 1998.  

DOE Green Energy (OSTI)

Pacific Northwest National Laboratory (PNNL) evaluated 19 Phase II screen sites in the Yakima River Basin as part of a multi-year study for the Bonneville Power Administration (BPA) on the effectiveness of fish screening devices. The sites were examined to determine if they were being effectively operated and maintained to provide fish a safe, efficient return to the Yakima River.

Blanton, S.L.; McMichael, Geoffrey A.; Neitzel, D.A.

1999-12-01T23:59:59.000Z

92

The Laboratory Performance Appraisal Process and Performance Evaluation and Measurement Plan Preparation Guidance  

NLE Websites -- All DOE Office Websites (Extended Search)

0136 0136 Contract No. DE-AC02-09CH11466 Section J - Appendix B J-B-1 ATTACHMENT J.2 APPENDIX B PERFORMANCE EVALUATION AND MEASUREMENT PLAN FISCAL YEAR 2014 Applicable to the Operation of the Princeton Plasma Physics Laboratory A Department of Energy National Laboratory Contract No. DE-AC02-09CH11466 Modification No.0136 Contract No. DE-AC02-09CH11466 Section J - Appendix B J-B-2 TABLE OF CONTENTS Section Page No. INTRODUCTION J-B-5 I. DETERMINING THE CONTRACTOR'S PERFORMANCE RATING AND PERFORMANCE-BASED FEE AND AWARD TERM ELIGIBILITY (as applicable) J-B-5 Performance Evaluation Methodology J-B-6 Calculating Individual Goal Scores and Letter Grade J-B-8 Determining the Amount of Performance-Based Fee Earned J-B-8

93

Using Weibull Distribution Analysis to Evaluate ALARA Performance  

SciTech Connect

As Low as Reasonably Achievable (ALARA) is the underlying principle for protecting nuclear workers from potential health outcomes related to occupational radiation exposure. Radiation protection performance is currently evaluated by measures such as collective dose and average measurable dose, which do not indicate ALARA performance. The purpose of this work is to show how statistical modeling of individual doses using the Weibull distribution can provide objective supplemental performance indicators for comparing ALARA implementation among sites and for insights into ALARA practices within a site. Maximum likelihood methods were employed to estimate the Weibull shape and scale parameters used for performance indicators. The shape parameter reflects the effectiveness of maximizing the number of workers receiving lower doses and is represented as the slope of the fitted line on a Weibull probability plot. Additional performance indicators derived from the model parameters include the 99th percentile and the exceedance fraction. When grouping sites by collective total effective dose equivalent (TEDE) and ranking by 99th percentile with confidence intervals, differences in performance among sites can be readily identified. Applying this methodology will enable more efficient and complete evaluation of the effectiveness of ALARA implementation.

E. L. Frome, J. P. Watkins, and D. A. Hagemeyer

2009-10-01T23:59:59.000Z

94

II  

Office of Legacy Management (LM)

II II c )3 c F r c L LI L rr c - r I P- c OAK RlDGE NATIONAL LABORATORY h U W -l\ &?ir;; ITi' m . 8 ORNL/RASA-92/l Results of the Radiological Survey at the Former Chapman Valve Manufacturing Company, Indian Orchard, Massachusetts (cIooo1) R. D. Foley M . S. Uziel MANAGED BY MARTIN MARIETTA ENERGY SYSTEMS, INC. FOR THE UNITED STATES DEPARTMENT OF ENERGY ORNLJRASA-92/l /- HEALTH AND SAFETY RESEARCH DIVISION Environmental Restoration and Waste Management Non-Defense Programs (Activity No. EX 20 20 01 0; ADS317OOOO) Results of the Radiological Survey at the Former Chapman Valve Manufacturing Company, Indian Orchard, Massachusetts (cIooo1) R. D. Foley and M. S. Uziel Date Issued - July 1992 Investigation learn R. E. Swaja - Measurement Applications and Development Manager

95

Oil Bypass Filter Technology Performance Evaluation - First Quarterly Report  

DOE Green Energy (OSTI)

This report details the initial activities to evaluate the performance of the oil bypass filter technology being tested by the Idaho National Engineering and Environmental Laboratory (INEEL) for the U.S. Department of Energy's FreedomCAR & Vehicle Technologies Program. Eight full-size, four-cycle diesel-engine buses used to transport INEEL employees on various routes have been equipped with oil bypass systems from the puraDYN Corporation. Each bus averages about 60,000 miles a year. The evaluation includes an oil analysis regime to monitor the presence of necessary additives in the oil and to detect undesirable contaminants. Very preliminary economic analysis suggests that the oil bypass system can reduce life-cycle costs. As the evaluation continues and oil avoidance costs are quantified, it is estimated that the bypass system economics may prove increasingly favorable, given the anticipated savings in operational costs and in reduced use of oil and waste oil avoidance.

Zirker, L.R.; Francfort, J.E.

2003-01-31T23:59:59.000Z

96

Performance Evaluation of a Bedside Cardiac SPECT System  

Science Conference Proceedings (OSTI)

This paper reports on the initial performance evaluation of a bedside cardiac PET/SPECT system. The system was designed to move within a hospital to image critically-ill patients, for example, those in intensive care unit (ICU) or emergency room settings, who cannot easily be transported to a conventional SPECT or PET facility. The system uses two compact (25 cm times 25 cm) detectors with pixilated NaI crystals and position sensitive PMTs. The performance is evaluated for both 140 keV (Tc-99m) and 511 keV (F-18) emitters with the system operating in single photon counting (SPECT) mode. The imaging performance metrics for both 140 keV and 511 keV included intrinsic energy resolution, spatial resolution (intrinsic, system, and reconstructed SPECT), detection sensitivity, count rate capability, and uniformity. Results demonstrated an intrinsic energy resolution of 31% at 140 keV and 23% at 511 keV, a planar intrinsic spatial resolution of 5.6 mm full width half-maximum (FWHM) at 140 keV and 6.3 mm FWHM at 511 keV, and a sensitivity of 4.15 countsmiddotmuCi-1 ldr s-1 at 140 keV and 0.67 counts ldr muCi-1 ldr s-1 at 511 keV. To further the study, a SPECT acquisition using a dynamic cardiac phantom was performed, and the resulting reconstructed images are presented.

M.T. Studenski, D.R. Gilland, J.G. Parker, B. Hammond, S. Majewski, A.G. Weisenberger, V. Popov

2009-06-01T23:59:59.000Z

97

Fiscal year 1998 Battelle performance evaluation agreement revision 1  

SciTech Connect

Fiscal Year 1998 represents the second full year utilizing a results-oriented, performance-based contract. This document describes the critical outcomes, objectives, performance indicators, expected levels of performance, and the basis for the evaluation of the Contractors performance for the period October 1, 1997 through September 30, 1998, as required by Articles entitled Use of Objective Standards of Performance, Self Assessment and Performance Evaluation and Critical Outcomes Review of the Contract DE-AC08-76RLO1830. In partnership with the Contractor and other key customers, the Department of Energy (DOE) Richland Operations Office has defined six critical outcomes that same as the core for the Contractors performance evaluation. The Contractor also utilizes these outcomes as a basis for overall management of the Laboratory. As stated above six critical outcomes have been established for FY 1998. These outcomes are based on the following needs identified by DOE-HQ, RL and other customers of the Laboratory. Our Energy Research customer desires relevant, quality and cost effective science. Our Environmental Management customer wants technology developed, demonstrated, and deployed to solve environmental cleanup issues. To ensure the diversification and viability of the Laboratory as a National asset, RL and HQ alike want to increase the Science and Technical contributions of PNNL related to its core capabilities. RL wants improved leadership/management, cost-effective operations, and maintenance of a work environment, which fosters innovative thinking and high morale. RL and HQ alike desire compliance with environment, safety and health (ES and H) standards and disciplined conduct of operations for protection of the worker, environment, and the public, As with all of Hanford, DOE expects contribution of the Laboratory to the economic development of the Tri-Cities community, and the region, to build a new local economy that is less reliant on the Hanford mission, as well as enhancing the status of the Laboratory as a valued corporate citizen of the Northwest Region. The Critical Outcome system focuses all of these customer desires into specific objectives and performance indicators, with supporting measures to track and foster continued improvement in meeting the needs (outcomes) of the Laboratory's customers.

DAVIS, T.L.

1998-10-22T23:59:59.000Z

98

Experimental Evaluation of Installed Cooking Exhaust Fan Performance  

NLE Websites -- All DOE Office Websites (Extended Search)

Experimental Evaluation of Installed Cooking Exhaust Fan Performance Experimental Evaluation of Installed Cooking Exhaust Fan Performance Title Experimental Evaluation of Installed Cooking Exhaust Fan Performance Publication Type Report LBNL Report Number LBNL-4183E Year of Publication 2010 Authors Singer, Brett C., William W. Delp, and Michael G. Apte Publisher Lawrence Berkeley National Laboratory City Berkeley Keywords airflow & pollutant transport group, cooktop, energy analysis and environmental impacts department, gas burners, indoor air quality, indoor environment department, kitchen, nitrogen dioxide, oven, pollutant emissions, range hood, residential, source control, task ventilation, technology, sustainability and impact assessment group Abstract The installed performance of cooking exhaust fans was evaluated through residential field experiments conducted on a sample of 15 devices varying in design and other characteristics. The sample included two rear downdraft systems, two under-cabinet microwave over range (MOR) units, three different installations of an under-cabinet model with grease screens across the bottom and no capture hood, two devices with grease screens covering the bottom of a large capture hood (one under-cabinet, one wall-mount chimney), four under-cabinet open hoods, and two open hoods with chimney mounts over islands. Performance assessment included measurement of airflow and sound levels across fan settings and experiments to quantify the contemporaneous capture efficiency for the exhaust generated by natural gas cooking burners. Capture efficiency is defined as the fraction of generated pollutants that are removed through the exhaust and thus not available for inhalation of household occupants. Capture efficiency (CE) was assessed for various configurations of burner use (e.g. single front, single back, combination of one front and one back, oven) and fan speed setting. Measured airflow rates were substantially lower than the levels noted in product literature for many of the units. This shortfall was observed for several units costing in excess of $1000. Capture efficiency varied widely (from <5% to roughly 100%) across devices and across conditions for some devices. As expected, higher capture efficiencies were achieved with higher fan settings and the associated higher air flow rates. In most cases, capture efficiencies were substantially higher for rear burners than for front burners. The best and most consistent performance was observed for open hoods that covered all cooktop burners and operated at higher airflow rates. The lowest capture efficiencies were measured when a front burner was used with a rear backdraft system or with lowest fan setting for above the range systems that do not cover the front burners.

99

II  

Office of Legacy Management (LM)

: " + ; . .Z + II . ? 8 . " ~. . . . a a' .; ,. ?> , . ' . : . ., ! , Environmental i r .,' : % , ~ ~ 9 . / ; i.3. -\ ,- I - 'I ' , 2 " .r: 1; . . , ~ . ,&- c . . a , ,, .,I;< . .' , , ? $ ; 1- !'I' . '...~ - .. :, , .I Closure Report for CAU No. 416 1: ' . Project Shoal Area I:' c!';,: .. 7. .. , . ~ 1 I' ,. Controlled Copy No. UNCONTROLLED { -* .. 4'. . 1 " . .. *. *" '.. . . , , ,I +' , ,.f.' I , I" I ', ', ctk;' . , I , '. :C, , I: : , . p . ? .,; . s . " . , k - ,

100

1985 Plant performance SMUDPV1 1-MW photovoltaic power plant. Final report II  

Science Conference Proceedings (OSTI)

Computer simulations were conducted to predict plant performance based upon the PV1 system design and using Fresno typical meteorological year data. The system performance has been evaluated by comparing the predicted data to actual measured data for net ac and dc generation, plane of array insolation, plant availability, efficiency, operating and maintenance costs and revenue. Data are graphed for each month of 1985. (LEW)

Collier, D.

1986-02-01T23:59:59.000Z

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101

Laboratory Performance Evaluation Report of SEL 421 Phasor Measurement Unit  

Science Conference Proceedings (OSTI)

PNNL and BPA have been in close collaboration on laboratory performance evaluation of phasor measurement units for over ten years. A series of evaluation tests are designed to confirm accuracy and determine measurement performance under a variety of conditions that may be encountered in actual use. Ultimately the testing conducted should provide parameters that can be used to adjust all measurements to a standardized basis. These tests are performed with a standard relay test set using recorded files of precisely generated test signals. The test set provides test signals at a level and in a format suitable for input to a PMU that accurately reproduces the signals in both signal amplitude and timing. Test set outputs are checked to confirm the accuracy of the output signal. The recorded signals include both current and voltage waveforms and a digital timing track used to relate the PMU measured value with the test signal. Test signals include steady-state waveforms to test amplitude, phase, and frequency accuracy, modulated signals to determine measurement and rejection bands, and step tests to determine timing and response accuracy. Additional tests are included as necessary to fully describe the PMU operation. Testing is done with a BPA phasor data concentrator (PDC) which provides communication support and monitors data input for dropouts and data errors.

Huang, Zhenyu; faris, Anthony J.; Martin, Kenneth E.; Hauer, John F.; Bonebrake, Christopher A.; Shaw, James M.

2007-12-01T23:59:59.000Z

102

Evaluation of Beam Loss and Energy Depositions for a Possible Phase II Design for LHC Collimation  

Science Conference Proceedings (OSTI)

The LHC beams are designed to have high stability and to be stored for many hours. The nominal beam intensity lifetime is expected to be of the order of 20h. The Phase II collimation system has to be able to handle particle losses in stable physics conditions at 7 TeV in order to avoid beam aborts and to allow correction of parameters and restoration to nominal conditions. Monte Carlo simulations are needed in order to evaluate the behavior of metallic high-Z collimators during operation scenarios using a realistic distribution of losses, which is a mix of the three limiting halo cases. Moreover, the consequences in the IR7 insertion of the worst (case) abnormal beam loss are evaluated. The case refers to a spontaneous trigger of the horizontal extraction kicker at top energy, when Phase II collimators are used. These studies are an important input for engineering design of the collimation Phase II system and for the evaluation of their effect on adjacent components. The goal is to build collimators that can survive the expected conditions during LHC stable physics runs, in order to avoid quenches of the SC magnets and to protect other LHC equipments.

Lari, L.; /EPFL-ISIC, Lausanne /CERN; Assmann, R.; /CERN; Bracco, C.; /EPFL-ISIC, Lausanne /CERN; Brugger, M.; /CERN; Cerutti, F.; /CERN; Doyle, E.; /SLAC; Ferrari, A.; /CERN; Keller, L.; Lundgren, S.; Markiewicz, Thomas W.; /SLAC; Mauri, M.; Redaelli, S.; Sarchiapone, L.; /CERN; Smith, J.; /SLAC; Vlachoudis, V.; Weiler, T.; /CERN

2011-11-07T23:59:59.000Z

103

Evaluation of Beam Losses And Energy Deposition for a Possible Phase II Design for LHC Collimation  

Science Conference Proceedings (OSTI)

The Large Hadron Collider (LHC) beams are designed to have high stability and to be stored for many hours. The nominal beam intensity lifetime is expected to be of the order of 20h. The Phase II collimation system has to be able to handle particle losses in stable physics conditions at 7 TeV in order to avoid beam aborts and to allow correction of parameters and restoration to nominal conditions. Monte Carlo simulations are needed in order to evaluate the behavior of metallic high-Z collimators during operation scenarios using a realistic distribution of losses, which is a mix of the three limiting halo cases. Moreover, the consequences in the IR7 insertion of the worst (case) abnormal beam loss are evaluated. The case refers to a spontaneous trigger of the horizontal extraction kicker at top energy, when Phase II collimators are used. These studies are an important input for engineering design of the collimation Phase II system and for the evaluation of their effect on adjacent components. The goal is to build collimators that can survive the expected conditions during LHC stable physics runs, in order to avoid quenches of the SC magnets and to protect other LHC equipments.

Lari, L.; Assmann, R.W.; Bracco, C.; Brugger, M.; Cerutti, F.; Ferrari, A.; Mauri, M.; Redaelli, S.; Sarchiapone, L.; Vlachoudis, Vasilis; Weiler, Th.; /CERN; Doyle, J.E.; Keller, L.; Lundgren, S.A.; Markiewicz, Thomas W.; Smith, J.C.; /SLAC; Lari, L.; /LPHE, Lausanne

2011-11-01T23:59:59.000Z

104

Habitat Evaluation Procedures (HEP) Report, Pend Oreille Wetlands Wildlife II Project, Technical Report 2002.  

DOE Green Energy (OSTI)

In 2002, the Habitat Evaluation Procedure (HEP) was used to determine baseline habitat suitability on the Pend Oreille Wetlands Wildlife II Project, an acquisition completed by the Kalispel Tribe of Indians in 1997. Evaluation species and appropriate models include bald eagle, black-capped chickadee, Canada goose, mallard, and yellow warbler. Habitat Suitability Index (HSI) values were visually estimated and agreed upon by all HEP team members. The Pend Oreille Wetlands Wildlife II Project provides a total of 313.91 Habitat Units (HUs) for the species evaluated. Open water habitat provides 16.08 HUs for Canada goose and mallard. Shoreline and island habitat provide 7.36 HUs fore Canada goose and mallard. Wet meadow provides 117.62 HUs for Canada goose and mallard. Scrub-shrub wetlands provide 9.78 HUs for yellow warbler, mallard, and white-tailed deer. Deciduous forested wetlands provide 140.47 HUs for bald eagle, black-capped chickadee, mallard, and white-tailed deer. Conifer forest provides 22.60 HUs for bald eagle, black-capped chickadee, and white-tailed deer. The objective of using HEP at the Pend Oreille Wetlands Wildlife II Project and other protected properties is to document the quality and quantity of available habitat for selected wildlife species. In this way, HEP provides information on the relative value of the same area at future points in time so that the effect of management activities on wildlife habitat can be quantified. When combined with other tools, the baseline HEP will be used to determine the most effective on-site management, restoration, and enhancement actions to increase habitat suitability for targeted species. The same process will be replicated every five years to quantitatively evaluate the effectiveness of management strategies in improving and maintaining habitat conditions while providing additional crediting to BPA for enhanced habitat values.

Holmes, Darren

2003-06-01T23:59:59.000Z

105

Evaluation of hydrothermal resources of North Dakota. Phase II. Final technical report  

DOE Green Energy (OSTI)

This evaluation of the hydrothermal resources of North Dakota is based on existing data on file with the North Dakota Geological Survey (NDGS) and other state and federal agencies, and field and laboratory studies conducted. The principal sources of data used during the Phase II study were WELLFILE, the computer library of oil and gas well data developed during the Phase I study, and WATERCAT, a computer library system of water well data assembled during the Phase II study. A field survey of the shallow geothermal gradients present in selected groundwater observation holes was conducted. Laboratory determinations of the thermal conductivity of core samples is being done to facilitate heat-flow calculations on those hole-of-convenience cased.

Harris, K.L.; Howell, F.L.; Winczewski, L.M.; Wartman, B.L.; Umphrey, H.R.; Anderson, S.B.

1981-06-01T23:59:59.000Z

106

Performance Evaluation of Gene Expression Programming for Hydraulic Data Mining  

E-Print Network (OSTI)

Abstract: Predication is one of the fundamental tasks of data mining. In recent years, Artificial Intelligence techniques are widely being used in data mining applications where conventional statistical methods were used such as Regression and classification. The aim of this work is to show the applicability of Gene Expression Programming (GEP), a recently developed AI technique, for hydraulic data prediction and to evaluate its performance by comparing it with Multiple Linear Regression (MLR). Both GEP and MLR were used to model the hydraulic jump over a roughened bed using very large series of experimental data that contain all the important flow and roughness parameters such as the initial Froude number, the height of roughness ratio, the length of roughness ratio, the initial length ratio (from the gate) and the roughness density. The results show that GEP is a promising AI approach for hydraulic data prediction.

Khalid Eldr; Abdel-azim Negm

2006-01-01T23:59:59.000Z

107

Performance evaluation of Janata and Deenbandhu biogas plants  

Science Conference Proceedings (OSTI)

Performance of the Janata and Deenbandhu fixed dome biogas plants for anaerobic digestion of dairy manure was evaluated under the conditions of a hilly region. In contrast to Janata, the Deenbandhu biogas plant was found to be not only cheaper on the basis of cost/m{sup 3} rated capacity of the plant, but it also produced more gas per unit of manure fed and per unit of digester volume in addition to maintaining a consistent rate of gas production during subsequent years from initial charging. The higher production of gas by 28.5% and 12.5% per kg of manure fed and 49.5% and 28.9% per m{sup 3} of digester volume was observed from this plant for highest 24 C and lowest 14 C digester temperatures of the plants for the months of July and December, respectively.

Kalia, A.K.; Kanwar, S.S. [H P Krishi Vishvavidyalaya, Palampur (India). Dept. of Agricultural Engineering

1996-04-01T23:59:59.000Z

108

Thermal performance evaluation of the Calmac (liquid) solar collector  

DOE Green Energy (OSTI)

The procedures used and the results obtained during the evaluation test program on the Calmac Manufacturing Company, S.N.1, (Liquid) Solar Collector are presented. The flat-plate collector uses water as the working fluid. The absorber plate is aluminum with plastic tubes coated with Urethane black. The glazing consists of a single .040'' Fiberglas reinforced polyester (Kalwall). The collector weight is 78.5 pounds with overall external dimensions of approximately 50.3'' x 98.3'' x 3.8''. The test program was conducted to obtain the following information: Thermal performance data under simulated conditions, structural behavior under static loading and the effects of long-term exposure to natural weathering. These tests were conducted using the MSFC Solar Simulator.

Usher, H.

1978-06-23T23:59:59.000Z

109

Statistical Performance Evaluation Of Soft Seat Pressure Relief Valves  

SciTech Connect

Risk-based inspection methods enable estimation of the probability of failure on demand for spring-operated pressure relief valves at the United States Department of Energy's Savannah River Site in Aiken, South Carolina. This paper presents a statistical performance evaluation of soft seat spring operated pressure relief valves. These pressure relief valves are typically smaller and of lower cost than hard seat (metal to metal) pressure relief valves and can provide substantial cost savings in fluid service applications (air, gas, liquid, and steam) providing that probability of failure on demand (the probability that the pressure relief valve fails to perform its intended safety function during a potentially dangerous over pressurization) is at least as good as that for hard seat valves. The research in this paper shows that the proportion of soft seat spring operated pressure relief valves failing is the same or less than that of hard seat valves, and that for failed valves, soft seat valves typically have failure ratios of proof test pressure to set pressure less than that of hard seat valves.

2013-03-26T23:59:59.000Z

110

Experimental Evaluation of Installed Cooking Exhaust Fan Performance  

SciTech Connect

The installed performance of cooking exhaust fans was evaluated through residential field experiments conducted on a sample of 15 devices varying in design and other characteristics. The sample included two rear downdraft systems, two under-cabinet microwave over range (MOR) units, three different installations of an under-cabinet model with grease screens across the bottom and no capture hood, two devices with grease screens covering the bottom of a large capture hood (one under-cabinet, one wall-mount chimney), four under-cabinet open hoods, and two open hoods with chimney mounts over islands. Performance assessment included measurement of airflow and sound levels across fan settings and experiments to quantify the contemporaneous capture efficiency for the exhaust generated by natural gas cooking burners.Capture efficiency is defined as the fraction of generated pollutants that are removed through the exhaust and thus not available for inhalation of household occupants. Capture efficiency (CE) was assessed for various configurations of burner use (e.g., single front, single back, combination of one front and one back, oven) and fan speed setting. Measured airflow rates were substantially lower than the levels noted in product literature for many of the units. This shortfall was observed for several units costing in excess of $1000. Capture efficiency varied widely (from<5percent to roughly 100percent) across devices and across conditions for some devices. As expected, higher capture efficiencies were achieved with higher fan settings and the associated higher air flow rates. In most cases, capture efficiencies were substantially higher for rear burners than for front burners. The best and most consistent performance was observed for open hoods that covered all cooktop burners and operated at higher airflow rates. The lowest capture efficiencies were measured when a front burner was used with a rear backdraft system or with lowest fan setting for above the range systems that do not cover the front burners.

Singer, Brett C.; Delp, William W.; Apte, Michael G.

2010-11-01T23:59:59.000Z

111

Experimental Evaluation of Installed Cooking Exhaust Fan Performance  

Science Conference Proceedings (OSTI)

The installed performance of cooking exhaust fans was evaluated through residential field experiments conducted on a sample of 15 devices varying in design and other characteristics. The sample included two rear downdraft systems, two under-cabinet microwave over range (MOR) units, three different installations of an under-cabinet model with grease screens across the bottom and no capture hood, two devices with grease screens covering the bottom of a large capture hood (one under-cabinet, one wall-mount chimney), four under-cabinet open hoods, and two open hoods with chimney mounts over islands. Performance assessment included measurement of airflow and sound levels across fan settings and experiments to quantify the contemporaneous capture efficiency for the exhaust generated by natural gas cooking burners.Capture efficiency is defined as the fraction of generated pollutants that are removed through the exhaust and thus not available for inhalation of household occupants. Capture efficiency (CE) was assessed for various configurations of burner use (e.g., single front, single back, combination of one front and one back, oven) and fan speed setting. Measured airflow rates were substantially lower than the levels noted in product literature for many of the units. This shortfall was observed for several units costing in excess of $1000. Capture efficiency varied widely (fromfan settings and the associated higher air flow rates. In most cases, capture efficiencies were substantially higher for rear burners than for front burners. The best and most consistent performance was observed for open hoods that covered all cooktop burners and operated at higher airflow rates. The lowest capture efficiencies were measured when a front burner was used with a rear backdraft system or with lowest fan setting for above the range systems that do not cover the front burners.

Singer, Brett C.; Delp, William W.; Apte, Michael G.

2010-11-01T23:59:59.000Z

112

An evaluation of the Fort Polk energy savings performance contract  

SciTech Connect

The US Army, in cooperation with an energy services company (ESCO), used private capital to retrofit 4,003 family housing units on the Fort Polk, Louisiana, military base with geothermal heat pumps (GHPs). The project was performed under an energy savings performance contract (ESPC) that provides for the Army and the ESCO to share the cost savings realized through the energy retrofit over the 20-year life of the contract. Under the terms of the contract, the ESCO is responsible for maintaining the GHPs and provides ongoing measurement and verification (M and V) to assure cost and energy savings to the Army. An independent evaluation conducted by the Department of Energy`s Oak Ridge National Laboratory indicates that the GHP systems in combination with other energy retrofit measures have reduced annual whole-community electrical consumption by 33%, and natural gas consumption by 100%. These energy savings correspond to an estimated reduction in CO{sub 2} emissions of 22,400 tons per year. Peak electrical demand has been reduced by 43%. The electrical energy and demand savings correspond to an improvement in the whole-community annual electric load factor from 0.52 to 0.62. As a result of the project, Fort Polk saves about $450,000 annually and benefits from complete renewal of the major energy consuming systems in family housing and maintenance of those systems for 20 years. Given the magnitude of the project, the cost and energy savings achieved, and the lessons learned during its design and implementation, the Fort Polk ESPC can provide a model for other housing-related energy savings performance contracts in both the public and private sectors.

Hughes, P.J.; Shonder, J.A.

1998-11-01T23:59:59.000Z

113

Performance confirmation of the Belle II imaging Time Of Propogation (iTOP) prototype counter  

SciTech Connect

The Bell Detector at the KEKB asymmetric-energy e{sup +}e{sup -} collider performed extremely well, logging an integrated luminosity an order of magnitude higher than the design baseline. With this inverse attobarn of integrated luminosity, time-dependent CP-violation inn the 3rd generation beauty quarks was firmly established, and is now a precision measurement. Going beyond this to explore if the Kobayashi-Maskawa mechanism is the only contributor to quark-mixing, and to interrogate the flavor sector for non-standard model enhancements, requires a detector and accelerator capable of topping this world-record luminosity by more than an order of magnitude. The Belle II detector at the upgraded Super-KEKB accelerator has been designed to meet this highly ambitious goal of operating at a luminosity approaching 10{sup 36} cm{sup -2} s{sup -1}. Such higher event rates and backgrounds require upgrade of essentially all detector subsystems, as well as their readout. Comparing the Belle composite (threshold Aerogel + Time of Flight) particle identification (PID) system with the DIRC employed by BaBar, quartz radiator internal Cherenkov photon detection proved to have higher kaon efficiency and lower pion fake rates. However, because the detector structure and CsI calorimeter will be retained, an improved barrel PID must fit within a very narrow envelope, as indicated in Figure 1. To effectively utilize this space, a more compact detector concept based on the same quartz radiators, but primarily using photon arrival time was proposed. This Time Of Propagation (TOP) counter was studied in a number of earlier prototype tests. Key to the necessary 10's of picosecond single-photon timing has been the development of the so-called SL-10 Micro-Channel Plate Photo-Multiplier Tube (MCP-PMT), which has demonstrated sub-40 ps single photon Transit Time Spread TTS. Further simulation study of this detector concept indicated that a focusing mirror in the forward direction, as well as a modest image expansion volume and more highly pixelated image plane improve the theoretical detector performance, since timing alone is limited by chromatic dispersion of the Cherenkov photons. This imaging-TOP (or iTOP) counter is the basis of Belle II barrel PID upgrade. However, a number of critical performance parameters must be demonstrated prior to releasing this prototype design for production manufacture.

Schwartz, Alan; Liu, Yang; Belhorn, Matt; /Cincinnati U.; Browder, Thomas; Varner, Gary; Andrew, Matt; Rosen, Marc; Barrett, Matthew; Nishimura, Kurtis; Anderson, Eric /Hawaii U.; Iijima, Toru; /Nagoya U. /PNL, Richland

2011-10-17T23:59:59.000Z

114

Left ventricular performance in type-II diabetics with first acute myocardial infarction: A radionuclide assessment  

Science Conference Proceedings (OSTI)

To assess myocardial performance in diabetics following acute myocardial infarction (AMI), resting gated radionuclide studies with Tc-99m were performed within two weeks of the onset of symptoms in matched groups of 18 type-II diabetics with their first clinical AMI (D-AMI), 20 nondiabetics with their first AMI (ND-AMI), and 20 nondiabetic noncardiac controls. Eighty-three percent of D-AMI and 50% of ND-AMI had left ventricular ejection fractions below 2 SD of normal. Diabetics had a significantly lower resting LVEF than nondiabetics (p<0.05). All patients with LVEF < 35% were diabetics. LV mean ejection and filling rates were similar in diabetics and nondiabetics. While 72% of diabetics showed abnormal wall motion in 5 or more segments (out of 9), only 45% of the nondiabetics were this extensively affected. Seventy-two percent of the diabetics showed one or more of akinesis and 39% had one or more areas of dyskinesis, compared to 30% and 5% of the nondiabetics respectively. The authors conclude that the extent, as well as the severity of the left ventricular impairment is more evident in the diabetics than in the nondiabetics, following the first acute MI.

Amin, E.M.; Karimeddini, M.K.; El-Haieg, M.O.; Dey, H.M.; Antar, M.A.

1985-05-01T23:59:59.000Z

115

A Performance Evaluation of an Alpha EV7 Processing Node  

Science Conference Proceedings (OSTI)

In this paper we detail the performance of a new Alpha-Server node containing 16 Alpha EV7 CPUs. The EV7 processor is based on the EV68 processor core that is used in terascale systems at Los Alamos National Laboratory and the Pittsburgh Supercomputing ... Keywords: Performance, analysis, application performance, communication performance, high performance computing, memory performance

Darren J. Kerbyson; Adolfy Hoisie; Scott Pakin; Fabrizio Petrini; Harvey J. Wasserman

2004-05-01T23:59:59.000Z

116

Performance testing of the Ford/GE Second Generation Single-Shaft Electric Propulsion (ETX-II) System  

Science Conference Proceedings (OSTI)

System-level-operational testing of the ETX-II test-bed electric vehicle is described and the results discussed. Because the traction battery is a major factor in the performance of an electric vehicle, previously reported work on the sodium-sulfur battery designed for use with the ETX-II is reviewed in detail. Chassis dynamometer performance of the test-bed vehicle met or exceeded design goals and compared reasonably well with SIMPLEV computer modeling results. Areas are identified wherein further work is needed to establish a firmer basis for comparison of the simulation and the observed results.

MacDowall, R.D.; Burke, A.F.

1993-06-01T23:59:59.000Z

117

Yakima and Touchet River Basins Phase II Fish Screen Evaluation, 2006-2007 Annual Report.  

DOE Green Energy (OSTI)

In 2006, Pacific Northwest National Laboratory (PNNL) researchers evaluated 27 Phase II fish screen sites in the Yakima and Touchet river basins. Pacific Northwest National Laboratory performs these evaluations for Bonneville Power Administration (BPA) to determine whether the fish screening devices meet those National Marine Fisheries (NMFS) criteria for juvenile fish screen design, that promote safe and timely passage of juvenile salmonids. The NMFS criteria against which the sites were evaluated are as follows: (1) a uniform flow distribution over the screen surface to minimize approach velocity; (2) approach velocities less than or equal to 0.4 ft/s protects the smallest salmonids from impingement; (3) sweep velocities that are greater than approach velocities to minimize delay of out-migrating juveniles and minimize sediment deposition near the screens; (4) a bypass flow greater than or equal to the maximum flow velocity vector resultant upstream of the screens to also minimize delay of out-migrating salmonids; (5) a gradual and efficient acceleration of flow from the upstream end of the site into the bypass entrance to minimize delay of out-migrating salmonids; and (6) screen submergence between 65% and 85% for drum screen sites. In addition, the silt and debris accumulation next to the screens should be kept to a minimum to prevent excessive wear on screens, seals and cleaning mechanisms. Evaluations consist of measuring velocities in front of the screens, using an underwater camera to assess the condition and environment in front of the screens, and noting the general condition and operation of the sites. Results of the evaluations in 2006 include the following: (1) Most approach velocities met the NMFS criterion of less than or equal to 0.4 ft/s. Of the sites evaluated, 31% exceeded the criterion at least once. Thirty-three percent of flat-plate screens had problems compared to 25% of drum screens. (2) Woody debris and gravel deposited during high river levels were a problem at several sites. In some cases, it was difficult to determine the bypass pipe was plugged until several weeks had passed. Slow bypass flow caused by both the obstructions and high river levels may have discouraged fish from entering the bypass, but once they were in the bypass, they may have had no safe exit. Perhaps some tool or technique can be devised that would help identify whether slow bypass flow is caused by pipe blockage or by high river levels. (3) Bypass velocities generally were greater than sweep velocities, but sweep velocities often did not increase toward the bypass. The latter condition could slow migration of fish through the facility. (4) Screen and seal materials generally were in good condition. (5) Automated cleaning brushes generally functioned properly; chains and other moving parts were typically well-greased and operative. (6) Washington Department of Fish and Wildlife (WDFW) and U.S. Bureau of Reclamation (USBR) generally operated and maintained fish screen facilities in a way that provided safe passage for juvenile fish. (7) Efforts with WDFW to find optimal louver settings at Naches-Selah were partly successful. The number of spots with excessive approach velocities was decreased, but we were unable to adjust the site to bring all approach values below 0.4 ft/s. (8) In some instances, irrigators responsible for specific maintenance at their sites (e.g., debris removal) did not perform their tasks in a way that provided optimum operation of the fish screen facility. Enforcement personnel proved effective at reminding irrigation districts of their responsibilities to maintain the sites for fish protection as well as irrigation. (9) We recommend placing datasheets providing up-to-date operating criteria and design flows in each site's logbox. The datasheet should include bypass design flows and a table showing depths of water over the weir and corresponding bypass flow. A similar datasheet relating canal gage readings and canal discharge in cubic feet per second would help identify times when the canal is taking mo

Chamness, Mickie; Tunnicliffe, Cherylyn [Pacific Northwest National Laboratory

2007-03-01T23:59:59.000Z

118

Soap Manufacturing TechnologyChapter 15 Soap Bar Performance Evaluation Methods  

Science Conference Proceedings (OSTI)

Soap Manufacturing Technology Chapter 15 Soap Bar Performance Evaluation Methods Surfactants and Detergents eChapters Surfactants - Detergents Press Downloadable pdf of\tChapter 15 Soap Bar Performance Evaluation

119

Performance evaluation of starch based polymer for enhanced oil recovery  

E-Print Network (OSTI)

Ever since the first petroleum well was drilled, water production has been a deterring force in maximizing an oilfield's hydrocarbon reserves. To satisfy the ever increasing global demand for petroleum, many different techniques for enhancing oil recovery have been investigated. One such technique is the application of a polymer solution to the near-wellbore area. The polymer solution lowers the relative permeability of the reservoir water thus increasing the amount of water left in formation. Although polymers can be beneficial, many environmental and economical concerns are also associated with their use. A starch based polymer would provide an environmentally harmless solution while using readily available and inexpensive agricultural products such as grains and cereals. This study uses numerical simulation to analyze the starch based polymer's performance in the near-wellbore area. Simulations are performed on two separate single-well, radial models. The first model covers a water influx at the circumferential edge of a reservoir, the second covers water influx from the bottom of a reservoir. Two different rock samples are adapted to each single-well model. The two rock samples are the Elgin and Okesa Sandstones. Within the models, a multitude of reservoir conditions are investigated to better evaluate the polymer's ability to enhance oil recovery. The Western Atlas' VIP simulator is used for this study. Application of the starch based polymer treatment to the near-wellbore is shown to be an effective agent in enhancing a well's oil recovery. For the edge water influx model, the polymer performed well for a wide range of variables, including penetration depth, production rate, radial permeability, application time, reservoir temperature, perforation interval, aquifer strength, porosity, and bottomhole pressure constraints. The bottom water influx model also produced good results for many of the simulation runs however, the effects of the penetration depth and production rate proved to be the most important factors in a successful polymer treatment. The variables investigated in the bottom water influx model are polymer penetration depth, production rate, permeability ratio, application time, reservoir temperature, aquifer strength, perforation height above the oil/water contact, porosity, and bottomhole pressure constraints.

Skurner, James Andrew

1997-01-01T23:59:59.000Z

120

Integrated heat pipe-thermal storage system performance evaluation  

SciTech Connect

Performance verification tests of an integrated heat pipe-thermal energy storage system have been conducted. This system is being developed as a part of an Organic Rankine Cycle-Solar Dynamic Power System (ORC-SDPS) receiver for future space stations. The integrated system consists of potassium heat pipe elements that incorporate thermal energy storage (TES) canisters within the vapor space along with an organic fluid (toluene) heater tube used as the condenser region of the heat pipe. During the insolation period of the earth orbit, solar energy is delivered to the surface of the heat pipe elements of the ORC-SDPS receiver and is internally transferred by the potassium vapor for use and storage. Part of the thermal energy is delivered to the heater tube and the balance is stored in the TES units. During the eclipse period of the orbit, the stored energy in the TES units is transferred by the potassium vapor to the toluene heater tube. A developmental heat pipe element was fabricated that employs axial arteries and a distribution wick connecting the wicked TES units and the heater to the solar insolation surface of the heat pipe. Tests were conducted to verify the heat pipe operation and to evaluate the heat pipe/TES units/heater tube operation by interfacing the heater unit to a heat exchanger.

Keddy, E.; Sena, J.T.; Merrigan, M.

1987-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ii performance evaluation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

DOE Order 435.1- Performance Assessments and Waste Incidental to Reprocessing Evaluations  

Energy.gov (U.S. Department of Energy (DOE))

This page focuses on DOE Order 435.1, Performance Assessments and Waste Incidental to Reprocessing Evaluations.

122

NREL Evaluates Performance of Heat Pump Water Heaters (Fact Sheet)  

SciTech Connect

NREL evaluates energy savings potential of heat pump water heaters in homes throughout all U.S. climate zones.

Not Available

2012-02-01T23:59:59.000Z

123

Washington Phase II Fish Diversion Screen Evaluations in the Yakima and Touchet River Basins, 2005-2006 Annual Reports.  

DOE Green Energy (OSTI)

In 2005, Pacific Northwest National Laboratory (PNNL) researchers evaluated 25 Phase II fish screen sites in the Yakima and Touchet river basins. Pacific Northwest National Laboratory performs these evaluations for Bonneville Power Administration (BPA) to determine whether the fish screening devices meet National Marine Fisheries Service (NMFS) criteria to promote safe and timely fish passage. Evaluations consist of measuring velocities in front of the screens, using an underwater camera to look at the condition and environment in front of the screens, and noting the general condition and operation of the sites. Results of the evaluations in 2005 include the following: (1) Most approach velocities met the NMFS criterion of less than or equal to 0.4 fps. Less than 13% of all approach measurements exceeded the criterion, and these occurred at 10 of the sites. Flat-plate screens had more problems than drum screens with high approach velocities. (2) Bypass velocities generally were greater than sweep velocities, but sweep velocities often did not increase toward the bypass. The latter condition could slow migration of fish through the facility. (3) Screen and seal materials generally were in good condition. (4) Automated cleaning brushes generally functioned properly; chains and other moving parts were typically well-greased and operative. (5) Washington Department of Fish and Wildlife (WDFW) and U.S. Bureau of Reclamation (USBR) generally operate and maintain fish screen facilities in a way that provides safe passage for juvenile fish. (6) In some instances, irrigators responsible for specific maintenance at their sites (e.g., debris removal) are not performing their tasks in a way that provides optimum operation of the fish screen facility. New ways need to be found to encourage them to maintain their facilities properly. (7) We recommend placing datasheets providing up-to-date operating criteria and design flows in each sites logbox. The datasheet should include bypass design flows and a table showing depths of water over the weir and corresponding bypass flow. This information is available at some of the sites but may be outdated. These data are used to determine if the site is running within design criteria. (8) Modifying use of debris control plates at Gleed helped minimize the extreme fluctuations in flow, but approach velocities are still too high. Other ways to reduce the approach velocities need to be tried, possibly including redesign of the site. (9) Alternatives to a screen site at Taylor should be considered. A lot of effort was spent trying to increase water to the site, but it still was unable to operate within NMFS criteria for most of the year and may be a hazard to juvenile salmonids. We conclude that the conditions at most of the Phase II fish screen facilities we evaluated in 2005 would be expected to provide safe passage for juvenile fish. For those sites where conditions are not always optimum for safe fish passage, PNNL researchers will try to coordinate with the WDFW and USBR in 2006 to find solutions to the problems. Some of those problems are consistently high approach velocities at specific sites, including Congdon, Naches-Selah, Union Gap, and Yakima-Tieton. We would like to be able to monitor changes in velocities as soon as operations and maintenance personnel adjust the louvers or porosity boards at these sites. This will give them immediate feedback on the results of their modifications and allow additional adjustments as necessary until the conditions meet NMFS criteria. Pacific Northwest National Laboratory has performed evaluations at many of these sites over the past 8 years, providing information WDFW and USBR personnel can use to perform their operations and maintenance more effectively. Consequently, overall effectiveness of the screens facilities has improved over time.

Chamness, Mickie; Abernethy, C.; Tunnicliffe, Cherylyn (PNNL)

2006-02-01T23:59:59.000Z

124

Effects of position and number of relevant documents retrieved on users' evaluations of system performance  

Science Conference Proceedings (OSTI)

Information retrieval research has demonstrated that system performance does not always correlate positively with user performance, and that users often assign positive evaluation scores to search systems even when they are unable to complete tasks successfully. ... Keywords: Search performance, precision, presentation of search results, ranking, satisfaction, user evaluation of performance

Diane Kelly; Xin Fu; Chirag Shah

2010-05-01T23:59:59.000Z

125

High Performance Computing Symposium 1996 Evaluating the Performance of Parallel Programs in a PseudoParallel MPI  

E-Print Network (OSTI)

High Performance Computing Symposium 1996 Evaluating the Performance of Parallel Programs 28­Feb­1981 Born in Halifax, Nova Scotia (Canada) Obtained BSc at Dalhousie University. Currently.'' In High Performance Computing Symposium '95. Demaine, Erik D. 1994. ``Heterogeneous Organization

Demaine, Erik

126

A performance evaluation of a new bitmap-based XML processing approach over RDBMS  

Science Conference Proceedings (OSTI)

This paper presents a comprehensive performance analysis of PACD; a novel bitmap-based XML processing approach introduced earlier to resolve several performance issues identified in existing XML database technology. The study evaluated three performance ...

Mohammed Al-Badawi; Haider Ali Ramadhan; Siobhan North; Barry Eaglestorne

2012-05-01T23:59:59.000Z

127

Washington Phase II Fish Diversion Screen Evaluations in the Yakima River Basin, 2002 Annual Report.  

DOE Green Energy (OSTI)

In 2002, the Pacific Northwest National Laboratory evaluated 23 Phase II fish screen sites in the Yakima River Basin as part of a multi-year project for the Bonneville Power Administration on the effectiveness of fish screening devices. Pacific Northwest National Laboratory collected data to determine whether velocities in front of the screens and in the bypasses met National Marine Fisheries Service criteria to promote safe and timely fish passage and whether bypass outfall conditions allowed fish to safely return to the river. In addition, Pacific Northwest National Laboratory conducted underwater video surveys to evaluate the environmental and operational conditions of the screen sites with respect to fish passage. Based on evaluations in 2002, PNNL concluded that: (1) In general, water velocity conditions at the screen sites met fish passage criteria set by the National Marine Fisheries Service. (2) Conditions at most facilities would be expected to provide for safe juvenile fish passage. (3) Conditions at some facilities indicate that operation and/or maintenance should be modified to increase safe juvenile fish passage. (4) Automated cleaning brushes generally functioned properly; chains and other moving parts were typically well greased and operative. (5) Removal of sediment buildup and accumulated leafy and woody debris should be improved at some sites.

Carter, J.; McMichael, G.; Chamness, M. (Pacific Northwest National Laboratory)

2003-01-01T23:59:59.000Z

128

Washington Phase II Fish Diversion Screen Evaluations in the Yakima River Basin, 2003 Annual Report.  

DOE Green Energy (OSTI)

In 2003, the Pacific Northwest National Laboratory (PNNL) evaluated 23 Phase II fish screen sites in the Yakima River Basin as part of a multi-year project for the Bonneville Power Administration on the effectiveness of fish screening devices. PNNL collected data to determine whether velocities in front of the screens and in the bypasses met the National Oceanic and Atmospheric Administration Fisheries (NOAA Fisheries, formerly the National Marine Fisheries Service [NMFS]) criteria to promote safe and timely fish passage. In addition, PNNL conducted underwater video surveys to evaluate the environmental and operational conditions of the screen sites with respect to fish passage. Based on evaluations in 2003, PNNL concluded that: (1) In general, water velocity conditions at the screen sites met fish passage criteria set by the NOAA Fisheries. (2) Conditions at most facilities would be expected to provide for safe juvenile fish passage. (3) Conditions at some facilities indicate that operation and/or maintenance should be modified to improve juvenile fish passage conditions. (4) Automated cleaning brushes generally functioned properly; chains and other moving parts were typically well greased and operative. (5) Removal of sediment buildup and accumulated leafy and woody debris could be improved at some sites.

Vucelick, J.; McMichael, G.; Chamness, M. (Pacific Northwest National Laboratory)

2004-05-01T23:59:59.000Z

129

Evaluation of Titanium for Vehicle Fuel Economy and Performance ...  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, 2010 TMS Annual Meeting & Exhibition. Symposium , Cost-Affordable Titanium III. Presentation Title, Evaluation of Titanium for ...

130

NREL Evaluates Thermal Performance of Uninsulated Walls to Improve...  

NLE Websites -- All DOE Office Websites (Extended Search)

homes, which are currently over-predicted. Potential Impact Accurate estimates of the thermal characteris- tics of uninsulated assemblies will reduce pre-retrofit performance...

131

Comparative evaluation of cooling tower drift eliminator performance  

E-Print Network (OSTI)

The performance of standard industrial evaporative cooling tower drift eliminators is analyzed using experiments and numerical simulations. The experiments measure the

Chan, Joseph Kwok-Kwong

132

Experimental performance evaluation of line-focus sun trackers  

DOE Green Energy (OSTI)

Two sun trackers have been tested for tracking accuracy on an sun tracker. Both performed well during the entire test period. Their tracking performance as a function of insolation level was established, and their overall tracking accuracy (rms tracking error) was calculated. Both the flux-line and the shadowband tracker were found to have an effective rms error of about 1 milliradian. This information was used to determine the impact that the two trackers have on the annual energy performance of typical parabolic trough concentrating collectors. One milliradian rms tracking errors were found to result in negligibly small annual performance losses.

Gee, R.C.

1982-05-01T23:59:59.000Z

133

Performance evaluation of natural draught cooling towers with anisotropic fills.  

E-Print Network (OSTI)

??ENGLISH ABSTRACT: In the design of a modern natural draught wet-cooling tower (NDWCT), structural and performance characteristics must be considered. Air flow distortions and resistances… (more)

Reuter, Hanno Carl Rudolf

2010-01-01T23:59:59.000Z

134

Evaluation and performance enhancement of cooling tower spray zones.  

E-Print Network (OSTI)

??ENGLISH ABSTRACT: The performance of wet cooling towers can be improved by installing spray nozzles that distribute the cooling water uniformly onto the fill whilst… (more)

Roux, Daniel

2012-01-01T23:59:59.000Z

135

Evaluation and performance prediction of cooling tower spray zones.  

E-Print Network (OSTI)

??Cooling tower spray nozzle performance characteristics such as the water distribution onto the fill material, air side pressure drop, pump head, drop size distribution and… (more)

Viljoen, D. J.

2006-01-01T23:59:59.000Z

136

New Environmental Friendly Evaluation Criterion for Coal-Fired Power Plant Comprehensive Performance  

Science Conference Proceedings (OSTI)

This paper proposes a new environmental friendly evaluation criterion to assess the comprehensive performance of coal-fired power plant. The new evaluation criterion, which is called the comprehensive Index of Energy, Resources and Environment (IERE), ... Keywords: power plant, evaluation criterion, environmental friendly, comperhensive performance

Gang Xu; Shiyuan Lu; Yongping Yang; Liqiang Duan; Ji Li; Le Li; Xiaona Song

2010-06-01T23:59:59.000Z

137

Pre-test evaluation of LLTR Series II Test A-6. [Large Leak Test Facility  

SciTech Connect

Purpose of this report is to present pre-test predictions of pressure histories for the A6 test to be conducted in the Large Leak Test Facility (LLTF) at the Energy Technology Engineering Center. A6 is part of a test program being conducted to evaluate the effects of leaks produced by a double-ended guillotine rupture of a single tube. A6 will provide data on the CRBR prototypical double rupture disc performance.

Knittle, D.

1980-11-01T23:59:59.000Z

138

1992-1993 Bonneville Appliance Efficiency Program: Showerhead Evaluation Volume II - Appendices  

SciTech Connect

This report included the appendices for 1992-1993 Bonneville appliance efficiency program: showerhead evaluation. It consists of nine appendices, titled: Bonneville documents; overview of research projects; Puget Power and Light persistence study; hot-water flow analyses and assumptions documentation; regional end-use metering program; showerhead and faucet aerator performance assessment; Bonneville showerhead program distribution methods by participating utility; water- and energy-saving measure distribution methods literature review; REMP study load shape results.

Warwick, W.M.

1995-01-01T23:59:59.000Z

139

Performance evaluation of a dynamic load-balancing library for cluster computing  

Science Conference Proceedings (OSTI)

The performance of scientific applications in heterogeneous environments has been improved with the research advances in dynamic scheduling at application and runtime system levels. This paper presents the performance evaluation of a library as a result ... Keywords: cluster computing, data migration, dynamic load balancing library, dynamic scheduling, loop scheduling, overhead analysis, parallel computing, parallel runtime system, performance evaluation, resource management, task migration

Ioana Banicescu; Ricolindo L. Carino; Jaderick P. Pabico; Mahadevan Balasubramaniam

2005-05-01T23:59:59.000Z

140

An Evaluation of High-Performance Embedded Processing on MPPAs  

Science Conference Proceedings (OSTI)

Embedded signal processing is facing the challenges of increased performance as well as to achieve energy efficiency. Massively parallel processor arrays (MPPAs) consisting of tens or hundreds of processing cores offer the possibility of meeting the ...

Zain-ul-Abdin, Bertil Svensson

2013-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "ii performance evaluation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

An Evaluation of Wind Profiler, RASS, and Microwave Radiometer Performance  

Science Conference Proceedings (OSTI)

Several ground-based remote Sensors were operated together in Colorado during February and March 1991 to obtain continuous profiles of the kinematic and thermodynamic structure of the atmosphere. Instrument performance is compared for five ...

B. E. Martner; D. B. Wuertz; B. B. Stankov; R. G. Strauch; E. R. Westwater; K. S. Gage; W. L. Ecklund; C. L. Martin; W. F. Dabberdt

1993-04-01T23:59:59.000Z

142

Evaluation of a Decoupling-Based Fault Detection and Diagnostic Technique - Part II: Field Evaluation and Application  

E-Print Network (OSTI)

Existing methods addressing automated fault detection and diagnosis (FDD) for vapor compression air conditioning system have good performance for faults that occur individually, but they have difficulty in handling multiple-simultaneous faults. The decoupling-based (DB) FDD method explicitly addresses diagnostics for multiple-simultaneous faults for the first time. This paper is the second part of a two-part evaluation of the decoupling-based (DB) fault detection and diagnosis (FDD) technique whose intent is to validate the DB FDD performance and demonstrate its applications. The first part focuses on sensitivity and robustness evaluation through controlled field emulation testing. In this paper, the technique is applied to a number of field sites in California. Detailed results are given for a single site and summary results are given for the other sites. In sum, about 70% of the investigated systems are impacted by faults and about 40% have more than one fault. Service is justified for about 40% of the units. Most of the diagnosed faults are verified through field visits.

Li, H.; Braun, J.

2006-01-01T23:59:59.000Z

143

Evaluation de la performance d'un opérateur en fonction de sa tâche. application aux IHM  

Science Conference Proceedings (OSTI)

In this paper we propose a methodology - dP/dT - for the evaluation of evolving interaction systems in the general frame of aeronautics. Keywords: MMI evaluation, aeronautics, cognitive performance variability

Laurent Bayssié; Laurent Chaudron

2002-11-01T23:59:59.000Z

144

Performance evaluation of transmit diversity techniques in the CDMA 2000 standard  

E-Print Network (OSTI)

This thesis evaluates the performance of two forward-link transmit diversity techniques in the CDMA2000 standard: Space-Time Spreading (STS) and Phase-Sweep Transmit Diversity (PSTD). For each technique, the evaluation ...

Vajapeyam, Murali S. (Murali Srinivasan)

2004-01-01T23:59:59.000Z

145

Laboratory Performance Evaluation of Residential Integrated Heat Pump Water Heaters  

SciTech Connect

This report discusses how a significant opportunity for energy savings is domestic hot water heating, where an emerging technology has recently arrived in the U.S. market: the residential integrated heat pump water heater. A laboratory evaluation is presented of the five integrated HPWHs available in the U.S. today.

Sparn, B.; Hudon, K.; Christensen, D.

2011-09-01T23:59:59.000Z

146

Guide for Evaluating and Establishing Performance of Emerging DR Technologies  

Science Conference Proceedings (OSTI)

This engineering guide characterizes heat-rate (efficiency), cogeneration (waste heat), electrical characteristics (for example, voltage and power quality), immunity, and emissions such as noise, disposable/hazardous wastes, and electromagnetic interference (EMI) for distributed resource (DR) technologies. The guide outlines requirements for consistent protocols, methods, and procedures applied to test and evaluate emerging DR technologies. Examples of these technologies are internal combustion engines, ...

2001-12-04T23:59:59.000Z

147

GREENHOUSE GAS EMISSIONS CONTROL BY OXYGEN FIRING IN CIRCULATING FLUID BED BOILERS (Phase II--Evaluation of the Oxyfuel CFB Concept)  

SciTech Connect

The overall project goal is to determine if carbon dioxide can be captured and sequestered at a cost of about $10/ton of carbon avoided, using a newly constructed Circulating Fluidized Bed combustor while burning coal with a mixture of oxygen and recycled flue gas, instead of air. This project is structured in two Phases. Phase I was performed between September 28, 2001 and May 15, 2002. Results from Phase I were documented in a Topical Report issued on May 15, 2003 (Nsakala, et al., 2003), with the recommendation to evaluate, during Phase II, the Oxyfuel-fired CFB concept. DOE NETL accepted this recommendation, and, hence approved the project continuation into Phase II. Phase 2. The second phase of the project--which includes pilot-scale tests of an oxygen-fired circulating fluidized bed test facility with performance and economic analyses--is currently underway at ALSTOM's Power Plant Laboratories, located in Windsor, CT (US). The objective of the pilot-scale testing is to generate detailed technical data needed to establish advanced CFB design requirements and performance when firing coals and delayed petroleum coke in oxygen/carbon dioxide mixtures. Results will be used in the design of oxygen-fired CFB boilers--both retrofit and new Greenfield--as well as to provide a generic performance database for other researchers. At the conclusion of Phase 2, revised costs and performance will be estimated for both retrofit and new Greenfield design concepts with CO2 capture, purification, compression, and liquefaction.

John L. Marion; Nsakala ya Nsakala

2003-11-09T23:59:59.000Z

148

Laboratory Evaluation of Residential Furnace BlowerPerformance  

SciTech Connect

A testing program was undertaken at Lawrence Berkeley National Laboratory and an electric utility (Pacific Gas and Electric Co.) to compare the performance of furnace blowers. This laboratory testing program was undertaken to support potential changes to California Building Standards regarding in-field furnace blower energy use. This technical support includes identifying suitable performance metrics and target performance levels for use in standards. Five different combinations of blowers and residential furnaces were tested for air moving performance. Three different types of blower and motor combinations were tested in two different furnace cabinets. The blowers were standard forward--curved impellors and a prototype impeller with reverse-inclined blades. The motors were two 6-pole permanent split capacitor (PSC) single-phase induction motors, a brushless permanent magnet (BPM) motor and a prototype BPM designed for use with a prototype reverse-inclined impellor. The laboratory testing operated each blower and furnace combination over a range of air flows and pressure differences to determine air flow performance, power consumption and efficiency. Additional tests varied the clearance between the blower housing and the furnace cabinet, and the routing of air flow into the blower cabinet.

Walker, Iain S.; Lutz, Jim D.

2005-09-01T23:59:59.000Z

149

Indigenous development and performance evaluation of BARC aerodynamic size separator (BASS)  

E-Print Network (OSTI)

Commercially available cascade impactors, commonly used for aerodynamic size separation of aerosol particles, are based on the principle of inertial impaction. As of now, these instruments are imported at a cost of several lakhs of rupees; hence an effort has been made to develop an aerodynamic particle sizer indigenously in BARC. This unit, referred to as BARC Aerodynamic Size Separator (BASS), separates aerosols into seven size classes ranging from 0.53 mu m to 10 mu m and operates at a flow rate of 45 Ipm. Intercomparison studies between the standard Andersen Mark-II (Grasbey Andersen Inc.) impactor and BASS using nebulizer generated aerosols have consistently shown excellent performance by BASS in all respects. In particular, BASS yielded the parameters of polydisperse aerosols quite accurately. Experiments to evaluate the individual stage cut-off diameters show that these are within 8% of their designed value for all stages except the higher two stages which indicate about 30% lower values than the desig...

Singh, S; Khan, A; Mayya, Y S; Narayanan, K P; Purwar, R C; Sapra, B K; Sunny, F

2002-01-01T23:59:59.000Z

150

Evaluating The Performance Of Mobile Agents In Network Management  

E-Print Network (OSTI)

Currently, most network management systems are centralized and therefore, they can not scale when the size or the complexity of the network increases. This paper aims to investigate mobile agent scalability in network management, in order to nd when mobile agents improve the management efficiency. We compare mobile agent performance with SNMP one in several simulations. Results show that the mobile agent performs better when the number of managed network elements ranges between two bounds and that the mobile agent is less sensitive to changes on a general topology.

Marcelo Gonçalves Rubinstein; Otto Carlos Muniz Bandeira Duarte; Marcelo Gon#alves Rubinstein; Otto Carlos Muniz B; Eira Duarte

1999-01-01T23:59:59.000Z

151

Performance evaluation of wet-cooling tower fills with computational fluid dynamics.  

E-Print Network (OSTI)

??ENGLISH ABSTRACT: A wet-cooling tower fill performance evaluation model developed by Reuter is derived in Cartesian coordinates for a rectangular cooling tower and compared to… (more)

Gudmundsson, Yngvi

2012-01-01T23:59:59.000Z

152

Evaluating Performance in Spatial Data Infrastructures for Geoprocessing  

Science Conference Proceedings (OSTI)

Effective and efficient Web services infrastructures for geoprocessing are essential for fieldssuch as e-government and e-tourism. However, few model-based approaches exist that let researchersanalyze and measure system implementation performance. Here, ... Keywords: Web services, e-government, e-tourism, tourism, spatial data infrastructure, SDI, geographic information services, GIS, caching, network adaptation, data granularity, and communication mode, geoprocessing

Marius Scholten; Ralf Klamma; Christian Kiehle

2006-09-01T23:59:59.000Z

153

Building performance evaluation and certification in the UK  

E-Print Network (OSTI)

for a reliable measurement and verification system was demonstrated in the US through an analysis of the wide variance of energy and carbon performance of buildings under the LEED programme. In a study by Wedding and Brown (2007, 2008) it was found...

Kelly, Scott; Pollitt, Michael G.; Crawford Brown, Doug

2012-10-04T23:59:59.000Z

154

Solar-assisted heat pump field performance evaluation. Final report  

SciTech Connect

An analysis carried out to determine some guidelines to use in laying out six ground coil installations is summarized. The installation of the solar-assisted ground coupled heat pumps is described. The instrumentation employed at each of the installations in order to obtain performance data is discussed. (MHR)

1980-11-28T23:59:59.000Z

155

A New Method to Evaluate Human-Robot System Performance  

Science Conference Proceedings (OSTI)

One of the key issues in space exploration is that of deciding what space tasks are best done with humans, with robots, or a suitable combination of each. In general, human and robot skills are complementary. Humans provide as yet unmatched capabilities ... Keywords: analysis, human-robot systems, performance, robotics

G. Rodriguez; C. R. Weisbin

2003-03-01T23:59:59.000Z

156

Comparative performance evaluation of global-local hybrid ensemble  

Science Conference Proceedings (OSTI)

This paper presents a comprehensive simulation study which aims to profile the performance capabilities of the global-local hybrid ensemble in comparison with leading ensemble classifiers as reported in recent studies in the literature. The global-local ... Keywords: Hybrid ensemble, classification, global/local learning, heterogeneous/homogeneous diversity, nonparametric comparison

Dustin Baumgartner; Gursel Serpen

2011-04-01T23:59:59.000Z

157

Solar domestic hot water system inspection and performance evaluation handbook  

DOE Green Energy (OSTI)

A reference source and procedures are provided to a solar technician for inspecting a solar domestic hot water system after installation and for troubleshooting the system during a maintenance call. It covers six generic DHW systems and is designed to aid the user in identifying a system type, diagnosing a system's problem, and then pinpointing and evaluating specific component problems. A large amount of system design and installation information is also included.

Not Available

1981-10-01T23:59:59.000Z

158

Thermal Performance Evaluation of Innovative Metal Building Roof Assemblies  

Science Conference Proceedings (OSTI)

In order to meet the coming energy codes, multiple layers of various insulation types will be required. The demand for greater efficiency has pushed insulation levels beyond the cavity depth. These experiments show the potential for improving metal building roof thermal performance. Additional work is currently being done by several stakeholders, so the data is expanding. These experiments are for research and development purposes, and may not be viable for immediate use.

Walker, Daniel James [ORNL; Zaltash, Abdolreza [ORNL; Atchley, Jerald Allen [ORNL

2011-01-01T23:59:59.000Z

159

ART CCIM Phase II-A Off-Gas System Evaluation Test Plan  

Science Conference Proceedings (OSTI)

This test plan defines testing to be performed using the Idaho National Laboratory (INL) engineering-scale cold crucible induction melter (CCIM) test system for Phase II-A of the Advanced Remediation Technologies (ART) CCIM Project. The multi-phase ART-CCIM Project is developing a conceptual design for replacing the joule-heated melter (JHM) used to treat high level waste (HLW) in the Defense Waste Processing Facility (DWPF) at the Savannah River Site (SRS) with a cold crucible induction melter. The INL CCIM test system includes all feed, melter off-gas control, and process control subsystems needed for fully integrated operation and testing. Testing will include operation of the melter system while feeding a non-radioactive slurry mixture prepared to simulate the same type of waste feed presently being processed in the DWPF. Process monitoring and sample collection and analysis will be used to characterize the off-gas composition and properties, and to show the fate of feed constituents, to provide data that shows how the CCIM retrofit conceptual design can operate with the existing DWPF off-gas control system.

Nick Soelberg; Jay Roach

2009-01-01T23:59:59.000Z

160

Solar energy system performance evaluation, July 1979 through June 1980  

SciTech Connect

The Loudoun County site is the Charles S. Monroe Vocational Technical School in Leesburg, Virginia. The active solar energy system is designed to supply 26% of the domestic hot water demand. It is equipped with 1225 square feet of double glazed flat-plate collectors manufactured by Southwest Enertech, a 2056 gallon liquid storage tank located in the school's mechanical room, and a backup electric immersion heater, 2 stage, 20 kW per stage. The system performance for the period July 1979 through June 1980 is presented, and the meteorological conditions are included. (WHK)

Missal, D.

1980-01-01T23:59:59.000Z

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161

Analysis and Evaluation For Equipment Performance by Surface Measurement  

E-Print Network (OSTI)

Many building owners and facility managers are deeply interested in both operation and maintenance costs related to a building's life cycle. Optimizing energy consumption and obtaining long equipment activity requires sophisticated management. If the data needed for this management are unavailable, then measures must be taken to augment them. We were able to lower power consumption in heat source equipment by ap-proximately 12% by means of analysis and evaluations as well as using optimum measurement features that al-low measuring operation data without stopping opera-tion of surface measurement equipment. More cost-effective renewal plans and designs were achieved by proposing equipment specifications based on the cooling and heating load during operation.

Ishizuka, K.; Aizawa, N.; Shibata, K.; Yonezawa, H.; Yamada, S.

2006-01-01T23:59:59.000Z

162

Dynamic simulation and performance evaluation of fossil power plants  

Science Conference Proceedings (OSTI)

A dynamic performance model of a standard fossil-fired power plant has been developed. The model contains major components in a plant, including pulverizer, boiler, superheaters, reheaters, economizer, attemperators, pumps, valves, pipings, condenser, turbines, deaerator and low/high pressure feedwater heaters. The EPRI Modular Modeling System (MMS) and Boeing Computer Services' Engineering Analysis System (EASY5) simulation language were used in the analysis. A system control model also developed to simulate the plant control and perform the necessary control functions. The plant model has a general structure and can readily be modified to simulate a specific power plant. To demonstrate the utility of the model, simulation calculations were carried out for a standard coal-fired power plant of the Middle South Services (MSS) during steady state and transient modes of operation. The results were obtained for full load and reduced loads down to 35 percent. In general, good agreement was obtained with the plant heat balance data. 15 refs., 35 figs., 11 tabs.

Hashemi, A.; Lin, C.S.; Munis, A.; Lee, S. (Science Applications International Corp., Hermosa Beach, CA (USA))

1988-12-01T23:59:59.000Z

163

Thrust stand for vertically oriented electric propulsion performance evaluation  

Science Conference Proceedings (OSTI)

A variation of a hanging pendulum thrust stand capable of measuring the performance of an electric thruster operating in the vertical orientation is presented. The vertical orientation of the thruster dictates that the thruster must be horizontally offset from the pendulum pivot arm, necessitating the use of a counterweight system to provide a neutrally stable system. Motion of the pendulum arm is transferred through a balance mechanism to a secondary arm on which deflection is measured. A noncontact light-based transducer is used to measure displacement of the secondary beam. The members experience very little friction, rotating on twisting torsional pivots with oscillatory motion attenuated by a passive, eddy-current damper. Displacement is calibrated using an in situ thrust calibration system. Thermal management and self-leveling systems are incorporated to mitigate thermal and mechanical drifts. Gravitational force and torsional spring constants associated with flexure pivots provide restoring moments. An analysis of the design indicates that the thrust measurement range spans roughly four decades, with the stand capable of measuring thrust up to 12 N for a 200 kg thruster and up to approximately 800 mN for a 10 kg thruster. Data obtained from calibration tests performed using a 26.8 lbm simulated thruster indicated a resolution of 1 mN on 100 mN level thrusts, while those tests conducted on a 200 lbm thruster yielded a resolution of roughly 2.5 mN at thrust levels of 0.5 N and greater.

Moeller, Trevor [University of Tennessee Space Institute, Tullahoma, Tennessee 37388 (United States); Polzin, Kurt A. [NASA, Marshall Space Flight Center, Huntsville, Alabama 35812 (United States)

2010-11-15T23:59:59.000Z

164

An assessment of BWR (boiling water reactor) Mark-II containment challenges, failure modes, and potential improvements in performance  

SciTech Connect

This report assesses challenges to BWR Mark II containment integrity that could potentially arise from severe accidents. Also assessed are some potential improvements that could prevent core damage or containment failure, or could mitigate the consequences of such failure by reducing the release of fission products to the environment. These challenges and improvements are analyzed via a limited quantitative risk/benefit analysis of a generic BWR/4 reactor with Mark II containment. Point estimate frequencies of the dominant core damage sequences are obtained and simple containment event trees are constructed to evaluate the response of the containment to these severe accident sequences. The resulting containment release modes are then binned into source term release categories, which provide inputs to the consequence analysis. The output of the consequences analysis is used to construct an overall base case risk profile. Potential improvements and sensitivities are evaluated by modifying the event tree spilt fractions, thus generating a revised risk profile. Several important sensitivity cases are examined to evaluate the impact of phenomenological uncertainties on the final results. 75 refs., 25 figs., 65 tabs.

Kelly, D.L.; Jones, K.R.; Dallman, R.J. (EG and G Idaho, Inc., Idaho Falls, ID (USA)); Wagner, K.C. (Science Applications International Corp., Albuquerque, NM (USA))

1990-07-01T23:59:59.000Z

165

Artificial neural networks for rapid WWTP performance evaluation: Methodology and case study  

Science Conference Proceedings (OSTI)

Reliable performance evaluation of wastewater treatment plants (WWTPs) can be done by simulating the plant behavior over a wide range of influent disturbances, including series of rain events with different intensity and duration, seasonal temperature ... Keywords: Artificial neural networks, Modeling, Performance evaluation, Plant design, Simulation speed, Time series, Wastewater treatment plant

B. Ráduly; K. V. Gernaey; A. G. Capodaglio; P. S. Mikkelsen; M. Henze

2007-08-01T23:59:59.000Z

166

Supplier selection and performance evaluation in just-in-time production environments  

Science Conference Proceedings (OSTI)

The purpose of this paper is to aid just-in-time (JIT) manufacturers in selecting the most appropriate suppliers and in evaluating supplier performance. Many manufacturers employ the JIT philosophy in order to be more competitive in today's global market. ... Keywords: Just-in-time production, Neural network, Supplier performance evaluation, Supplier selection

Asl? Aksoy; Nursel Öztürk

2011-05-01T23:59:59.000Z

167

Evaluating Performance, Power, and Cooling in High Performance Computing (HPC) Data Centers  

SciTech Connect

This chapter explores current research focused on developing our understanding of the interrelationships involved with HPC performance and energy management. The first section explores data center instrumentation, measurement, and performance analysis techniques, followed by a section focusing on work in data center thermal management and resource allocation. This is followed by an exploration of emerging techniques to identify application behavioral attributes that can provide clues and advice to HPC resource and energy management systems for the purpose of balancing HPC performance and energy efficiency.

Evans, Jeffrey; Sandeep, Gupta; Karavanic, Karen; Marquez, Andres; Varsamopoulos, Girogios

2012-01-24T23:59:59.000Z

168

Dramaturgies of PLACE: evaluation, embodiment and performance in PLACE-Hampi  

Science Conference Proceedings (OSTI)

This paper examines an extensive user evaluation survey undertaken during an installation of PLACE-Hampi, a custom-built augmented stereoscopic panoramic interactive cultural heritage installation. The evaluation draws on the responses of 284 ... Keywords: ambisonic, co-presence, embodiment, evaluation, panoramic, performance, presence, stereoscopic, virtual heritage

Sarah Kenderdine; Jeffrey Shaw; Anita Kocsis

2009-10-01T23:59:59.000Z

169

Washington Phase II Fish Diversion Screen Evaluations in the Yakima River Basin, 1997 Annual Report.  

DOE Green Energy (OSTI)

The Pacific Northwest National Laboratory evaluated 19 Phase II screen sites in the Yakima River Basin at least three times each between April 30 and August 22, 1997. The sites were examined to determine if they were being effectively operated and maintained to provide fish a safe, efficient return to the river. Data were collected to determine if velocities in front of the screens and in the bypass met current NMFS criteria and promoted timely fish bypass, if fish were protected from injury due to impingement, entrainment, and predation, and whether bypass outfall conditions allowed fish to safely return to the river. A bi-directional flow meter and underwater video system were essential in completing the investigation. In general, water velocity conditions at the screen sites were acceptable by NMFS standards. High approach velocities and slow bypass flow were the most common problems noted. Although velocities often fluctuated from one sampling location to the next, average sweep and approach velocities were very good. In general, fish should not be impinged or experience delays in returning to the river under normal operating conditions. Most screens were properly sealed to prevent fish entrainment and injury, although potential problems were identified at several screen sites. Three sites had gap openings from the forebay to the aftbay, allowing fish to be entrained. Other sites had spaces larger than 3/32 inch where small fish could become trapped. Some drum screens had flat spots but these were not been confirmed as underwater gaps, primarily because of siltation. On rare occasions, seals were intact, but cracked or turned under. Submergence levels at the drum screen sites exceeded 85% for one third of our evaluations. Eight of 12 drum screen sites experienced high water levels during at least one evaluation. Only one operating site's submergence was measured at less than 65% submergence. Two flat plate screen sites were completely overtopped with water during one evaluation each. Although 1997 was an extreme high-water year, these overtopping events point out that some screens do not completely protect fish under the full range of potential operating conditions. Water depths at the outfall pipe were acceptable at all but four sites. Generally, water depths were low near the end of the irrigation season due to low river flows. Rock removal around the outfall pipe or pipe extension would improve the situation. We gauged the potential for predation by qualitatively measuring the types and amount of cover provided for predators in front of the screens and by recording random observations of fish large enough to be considered predators in the forebay. Predation was more likely to occur at drum screen sites than at flat plate screen sites. Drum sites provide more predator hiding places because greater amounts of woody debris accumulate under the drums and against the concrete walls that divide one screen bay from the next. Four sites had both woody debris and large fish present. These four sites were considered most likely to experience juvenile salmonid loss to predation. Periodic removal of woody debris from underneath the curvature of drum screens would decrease the likelihood of predation at these sites. Screens were generally well maintained. Automated cleaning brushes functioned properly, chains and other moving parts were well greased, and inoperative and algae-covered drum screens were eventually repaired and cleaned. However, removal of sediment build-up and accumulated woody debris are areas where improvement should be considered. Maintenance checks should include observation of bypass outfalls on a regular basis, as conditions at the end of the bypass pipe are likely to change seasonally, especially in streams with high gradients or unstable gravel. Post-season evaluations were conducted at 11 sites in November to try and confirm seal and drum screen defects, and locations of excessive sedimentation. This proved effective in several cases, but the winterization process eliminated some of the evidence. Severa

Blanton, S.; Neitzel, C.; Abernethy, C. (Pacific Northwest National Laboratory)

1998-02-01T23:59:59.000Z

170

Habitat Evaluation Procedure (HEP) Report for the Pend Oreille Wetlands Wildlife II Project, Technical Report 2002.  

DOE Green Energy (OSTI)

The Habitat Evaluation Procedure (HEP), developed in 1980 by the U.S. Fish and Wildlife Service (USFWS 1980a, USFWS 1980b), uses a habitat/species based approach to assessing project impacts, and is a convenient tool to document the predicted effects of proposed management actions. The Northwest Power Planning Council (NPPC) endorsed the use of HEP in its Columbia River Basin Fish and Wildlife Program to evaluate wildlife benefits and impacts associated with the development and operation of the federal Columbia River Basin hydroelectric system (NPPC 1994). The Albeni Falls Interagency Work Group (AFIWG) used HEP in 1987 to evaluate wildlife habitat losses attributed to the Albeni Falls hydroelectric facility (Martin et al. 1988). In 1992, the AFIWG (Idaho Department of Fish and Game; Kalispel, Coeur d'Alene, and Kootenai Tribes) began implementing activities to mitigate these losses. Implementation activities include protecting, restoring and enhancing wildlife habitat. HEPs are used extensively within the NPPC's Columbia River Basin Fish and Wildlife Program. Wildlife managers use HEP to determine habitat lost from the construction of the federal hydroelectric projects and habitat gained through NPPC mitigation program. Habitat Suitability Index (HSI) models for each of the seven target species are used to determine habitat quality and quantity losses for representative habitat cover types for this project. Target species include Bald Eagle, black-capped chickadee, Canada goose, mallard, muskrat, white-tailed deer and yellow warbler. In 2002, a HEP team determined the habitat condition of the 164-acre Pend Oreille Wetlands Wildlife II Project (Figure 1). The HEP team consisted of the following members and agencies: Roy Finley, Kalispel Natural Resource Department (KNRD); Neil Lockwood, KNRD; Brian Merson, KNRD; Sonny Finley, KNRD; Darren Holmes, KNRD; Anna, Washington Dept. of Fish and Game (WDFW); and Scott, WDFW. Baseline Habitat Units (HU) will be credited to Bonneville Power Administration (BPA) for protection of habitats within the project area. The HSI models used were identical to those modified for use in 1991 (Appendix 2). The objective of using HEP as an assessment tool is two-fold. First, it provides an unbiased and measured assessment of wildlife habitats within the mitigation parcel. This data is used to offset the Albeni Falls Dam HU loss ledger. That ledger accounts for the loss of wildlife habitat that resulted from the construction and inundation of Albeni Falls hydroelectric project and the extent to which those losses have been mitigated. Additionally, the baseline HEP evaluation describes existing habitat conditions on the property and will be used, along with other tools, to determine initial management, restoration, and enhancement activities. HEP analyses will be completed every five years to quantitatively evaluate the effectiveness of management strategies in improving and maintaining habitat conditions while providing additional HU crediting to BPA for enhanced habitat values.

Holmes, Darren

2003-06-01T23:59:59.000Z

171

Performance evaluation of Ormat unit at Wabuska, Nevada. Final report  

DOE Green Energy (OSTI)

Three nominal 24 hour tests under summer, winter and spring weather conditions, were run on an Ormat geothermal binary power generation machine. The machine, located at TAD's Enterprises in Wabuska, Nevada is supplied with approximately 830 gpm of geothermal water at 221/sup 0/F and has two spray cooling ponds. During the tests, temperature, pressure, and flows of geothermal water, freon, cooling water and instantaneous electrical production were recorded hourly. At least once during each test, energy consumption of the well pump, freon feed pump and cooling water pumps were made. Power output of the machine is limited by spray pond capacity. Net output ranged from 410.2 kW during summer conditions when cooling water was 65/sup 0/F to 610.4 kW during winter conditions when cooling water was 55/sup 0/F. Net resource utilization ranged from 1.005 Whr/lb during the summer test to 1.55 Whr/lb during the winter test. Spray pond performance averaged 63% for the fall and winter tests. Availability of the Ormat unit itself during the eight month test period was generally good, averaging 95.5%. Overall system availability, including well pumps, cooling system and electric grid was somewhat less - averaging 83%.

Culver, G.

1986-07-01T23:59:59.000Z

172

Performance and market evaluation of the bladeless turbine  

SciTech Connect

The three-inch diameter prototype bladeless turbine was tested with air over a range of inlet pressures from 20 to 100 psia and speeds of 10, 20, 30 and 40 thousand rpm. The peak efficiency of 22.5 percent was recorded at a pressure of 98 psia and a speed of 40,000 rpm. Efficiency increased slightly with speed and inlet pressure over the range of test conditions. The test program was somewhat hindered by mechanical failures. The turbine bearings in particular were unreliable, with two instances of outright failure and numerous cases of erratic performance. A model of the bladeless turbine was developed to aid in interpreting the experimental results. A macroscopic approach, incorporating several favorable assumptions, was taken to place a reasonable upper bound on turbine efficiency. The model analytically examines the flow through the air inlet nozzles and the interaction between the fluid jet and the turbine blades. The analysis indicates that the maximum possible efficiency of a tangential flow turbine with straight axial blades is 50 percent. This is a direct consequence of turning the fluid only 90 degrees relative to the turbine blade. The adoption of the bladeless turbine as the expander in an Organic Rankine Cycle (ORC) will depend to a great extent on the efficiency of the turbine. The market potential for ORC technology will also impact the adoption of the bladeless turbine. Other expanders have demonstrated efficiencies of 60 to 80% in ORC systems. The Gamell turbine had a peak test efficiency of 22.5% and a maximum theoretical efficiency of 50%. Costs of the turbine are highly uncertain, relying to a great extent on cost reductions achieved through quantity production and through learning.

Garrett-Price, B.A.; Barnhart, J.S.; Eschbach, E.J.

1982-10-01T23:59:59.000Z

173

High performance solar desiccant cooling system: performance evaluations and research recommendations  

DOE Green Energy (OSTI)

This report presents an assessment of the current status of solar desiccant cooling and makes recommendations for continued research to develop high performance systems competitive with conventional cooling systems. Solid desiccant, liquid desiccant, and hybrid systems combining desiccant dehumidifiers with vapor compressor units are considered. Currently, all desiccant systems fall somewhat short of being competitive with conventional systems. Hybrid systems appear to have the greatest potential in the short term. Solid systems are close to meeting performance goals. Development of high performance solid desiccant dehumidifiers based on parallel passage designs should be pursued. Liquid system collector/generators and efficient absorbers should receive attention. Model development is also indicated. Continued development by hybrid systems is directly tied to the above work.

Schlepp, D.R.; Schultz, K.J.

1984-09-01T23:59:59.000Z

174

Arterial Performance and Evaluation using Bluetooth and GPS Data  

E-Print Network (OSTI)

Accurate travel time data are necessary to monitor and evaluate traffic conditions effectively. In the past 20 years, the hours per year lost by the average driver have increased by 300% in the 85 largest U.S. cities, which translates into lost productivity and increased costs. State department of transportation (DOT) agencies and other government organizations need accurate travel time and speed information to better combat this congestion faced by motorists. In the past, ground truth travel time information was typically collected with probe vehicles using the “floating car” method. However, new methods using data collected from global positioning systems by private companies such as INRIX®, Navteq®, and TomTom® have emerged that allow travel time data to be obtained more cheaply and quickly. The Urban Mobility Report (UMR) has turned to these companies, specifically INRIX®, for calculating congestion indices across the United States. This is done by analyzing average speeds and reference speeds supplied by INRIX. The UMR analysis relies on INRIX-supplied reference speeds to calculate delay, which produces artificially high delay on many suburban arterials. Currently, these reference speeds are determined by taking the 85th percentile of weekly speeds (typically overnight hours [10PM to 6AM]). There is a need to refine the reference speeds on arterials in order to account for signal operations, particularly during the daytime hours, so that the UMR more accurately reflects arterial congestion across the nation. Using Bluetooth and INRIX speed data, this thesis develops a new reference speed methodology that accurately reflects arterial delay during daytime hours. This study found that a 60% daytime free-flow reference speed best represents arterial congestion. Using Highway Capacity Manual (HCM) guidelines, this thesis also explores the use of Bluetooth data for arterial and intersection level of service (LOS) analysis under both HCM 2000 and HCM 2010 methodologies. Through analysis, it was found that Bluetooth data capture more of the high and low LOS values compared to the HCM methodology based on segment speed calculations. These high and low LOS values, as well as the rapidly changing LOS between 15-minute intervals, could be attributed to an insufficient sample size.

Shollar, Brian 1988-

2012-12-01T23:59:59.000Z

175

THE SNAP II POWER CONVERSION SYSTEM TOPICAL REPORT NO. 14. MERCURY MATERIALS EVALUATION AND SELECTION  

SciTech Connect

SNAP II is the designation for a 3 kw nuclear auxiliary power unit to be used in a satellite vehicle. The SNAP II System consists of a reactor heat source, a boiler, a Hg Rankine engine, an alternator, and a condenser. The corrosion and subsequent mass transfer resulting from the use of Hg as the thermodynamic wo:king fluid are important considerations in the selection of materials for the SNAP II System. Consequently, corrosion and mass transfer behavior were under study for the past three years. Recent results of this study are presented and the corrosion mechanisms involved are discussed. (auth)

Nejedlik, J.F.

1961-04-10T23:59:59.000Z

176

A Pilot Study to Evaluate Development Effort for High Performance Computing  

E-Print Network (OSTI)

1 A Pilot Study to Evaluate Development Effort for High Performance Computing Victor Basili1 the development time for programs written for high performance computers (HPC). To attack this relatively novel students in a graduate level High Performance Computing class at the University of Maryland. We collected

Basili, Victor R.

177

CTDMPLUS: A Dispersion Model for Sources near Complex Topography. Part II: Performance Characteristics  

Science Conference Proceedings (OSTI)

The Complex Terrain Dispersion Model (CTDMPLUS), described in Part I of this paper, was evaluated using the SO2 field-study data from the Lovett generating station in southeastern New York state. For perspective, CTDMPLUS estimates were also ...

James O. Paumier; Donna J. Burns; Steven G. Perry

1992-07-01T23:59:59.000Z

178

Evaluation of H2 Getter Materials for Use in the TRUPACT-II  

DOE Green Energy (OSTI)

Savannah River Site (SRS) has many waste drums containing Pu-238 that exceed the currently allowed wattage for transportation in the Transuranic Package Transporter-II (TRUPACT-II). By eliminating layers of confinement in waste drums and using getters to remove hydrogen gas, the TRUPACT-II waste loading can be increased significantly, with the potential of reaching the package''s 40-watt thermal limit. The cost savings associated with increasing the waste loading are enormous, and can be measured by reduced numbers of shipments, required processing facilities, and years of effort. To support the decision-making process and provide a good starting point for future development efforts at SRTC, the design requirements for a getter system to be used in the TRUPACT-II were compiled and are discussed in detail in the Appendix.

Livingston, R.R.

1999-11-15T23:59:59.000Z

179

Evaluation of atmospheric transport models for use in Phase II of the historical public exposures studies at the Rocky Flats Plant  

Science Conference Proceedings (OSTI)

Five atmospheric transport models were evaluated for use in Phase II of the Historical Public Exposures Studies at the Rocky Flats Plant. Models included a simple straight-line Gaussian plume model (ISCST2), several integrated puff models (RATCHET, TRIAD, and INPUFF2), and a complex terrain model (TRAC). Evaluations were based on how well model predictions compared with sulfur hexafluoride tracer measurements taken in the vicinity of Rocky Flats in February 1991. Twelve separate tracer experiments were conducted, each lasting 9 hr and measured at 140 samplers in arcs 8 and 16 km from the release point at Rocky Flats. Four modeling objectives were defined based on the endpoints of the overall study: (1) the unpaired maximum hourly average concentration, (2) paired time-averaged concentration, (3) unpaired time-averaged concentration, and (4) arc-integrated concentration. Performance measures were used to evaluate models and focused on the geometric mean and standard deviation of the predicted-to-observed ratio and the correlation coefficient between predicted and observed concentrations. No one model consistently outperformed the others in all modeling objectives and performance measures. The overall performance of the RATCHET model was somewhat better than the other models.

Rood, A.S.; Killough, G.G.; Till, J.E.

1999-08-01T23:59:59.000Z

180

A Benchmark Suite for Evaluating the Performance of the WebODE Ontology Engineering Platform  

E-Print Network (OSTI)

Abstract. Ontology tools play a key role in the development and maintenance of the Semantic Web. Hence, we need in one hand to objectively evaluate these tools, in order to analyse whether they can deal with actual and future requirements, and in the other hand to develop benchmark suites for performing these evaluations. In this paper, we describe the method we have followed to design and implement a benchmark suite for evaluating the performance of the WebODE ontology engineering workbench, along with the conclusions obtained after using this benchmark suite for evaluating WebODE. 1.

Raúl García-castro; Asunción Gómez-pérez

2004-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ii performance evaluation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Analytical and experimental evaluation of solid waste drum fire performance volumes I and II  

Science Conference Proceedings (OSTI)

Fire hazards associated with drum storage of radioactively contaminated wastes are a major concern in DOE facilities design for long term storage of solid wastes in drums. These facilities include drums stored in pallet arrays and in rack storage systems. This report details testing in this area

Hecker, C.F., [Los Alamos Technical Associates, Inc., Kennewick, WA (United States); Rhodes, B.T.; Beitel, J.J.; Gottuk, D.T.; Beyler, C.L.; Rosenbaum, E.R., [Hughes Associates, Inc., Columbia, MD (United States)

1995-04-28T23:59:59.000Z

182

Criteria and Methods for Performing and Evaluating Solar-Weather Studies  

Science Conference Proceedings (OSTI)

Research criteria and methods are presented for performing and evaluating the growing discipline of solar-weather studies. A clear distinction among preliminary, exploratory, and confirmatory studies is presented, and it is shown that this ...

John A. Flueck; Timothy J. Brown

1993-02-01T23:59:59.000Z

183

Defense Nuclear Security Safeguards and Security Evaluation and Performance Assurance Program  

E-Print Network (OSTI)

for Defense Nuclear Security (DNS) is issuing this document to promulgate the DNS Evaluation and Performance Assurance Program of the NNSA safeguards and security functional area. Suggestions for improving this document are welcome and should be sent in writing to:

Bradley A. Peterson

2009-01-01T23:59:59.000Z

184

A Method of Performance Evaluation by Using the Analytic Network Process and Balanced Score Car  

Science Conference Proceedings (OSTI)

Performance evaluation is an important part of the enterprises' strategic management. The analytic hierarchy process (AHP) can provide an analytical means to determine the importance of the identified factors. The AHP method assumes that the factors ...

Ming-Chang Lee Ming-Cheng Wu; Hsiao-Wen Wang; Hsiu-Yuan Wang

2007-11-01T23:59:59.000Z

185

On the performance evaluation of a vision-based human-robot interaction framework  

Science Conference Proceedings (OSTI)

This paper describes the performance evaluation of a machine vision-based human-robot interaction framework, particularly those involving human-interface studies. We describe a visual programming language called RoboChat, and a complimentary dialog engine ...

Junaed Sattar; Gregory Dudek

2012-03-01T23:59:59.000Z

186

Evaluating the Performance of WSR-88D Severe Storm Detection Algorithms  

Science Conference Proceedings (OSTI)

This paper discusses some important issues and problems associated with evaluating the performance of radar-based severe storm detection algorithms. The deficiencies of using Storm Data as a source of verification are examined. Options for ...

Arthur Witt; Michael D. Eilts; Gregory J. Stumpf; E. De Wayne Mitchell; J. T. Johnson; Kevin W. Thomas

1998-06-01T23:59:59.000Z

187

Formulating Detergents and Personal Care ProductsChapter 11 Product Performance Evaluation  

Science Conference Proceedings (OSTI)

Formulating Detergents and Personal Care Products Chapter 11 Product Performance Evaluation Surfactants and Detergents eChapters Surfactants - Detergents AOCS C40438897CE3EDE1D489B325B910F465 Press Downloadable pd

188

A simulation approach to the evaluation of operational costs and performance in liner shipping operations  

Science Conference Proceedings (OSTI)

This paper presents a simulation model of the operation of a liner shipping network that considers multiple service routes and schedules. The objective is to evaluate the operational costs and performance associated with liner shipping, as well as the ...

Aldo A. McLean; William E. Biles

2008-12-01T23:59:59.000Z

189

An integrated methodology for the performance and reliability evaluation of fault-tolerant systems  

E-Print Network (OSTI)

This thesis proposes a new methodology for the integrated performance and reliability evaluation of embedded fault-tolerant systems used in aircraft, space, tactical, and automotive applications. This methodology uses a ...

Domínguez-García, Alejandro D. (Alejandro Dan)

2007-01-01T23:59:59.000Z

190

Performance Evaluation of Fast Ethernet, Giganet, and Myrinet on a Cluster  

Science Conference Proceedings (OSTI)

This paper evaluates the performance of three popular technologies used to interconnect machines on clusters: Fast Ethernet, Myrinet and Giganet. To achieve this purpose, we used the NAS Parallel Benchmarks. Surprisingly, for the LU application, the ...

Marcelo Lobosco; Vítor Santos Costa; Claudio Luis de Amorim

2002-04-01T23:59:59.000Z

191

Measurements of the Total Water Content of Cirrus Clouds. Part II: Instrument Performance and Validation  

Science Conference Proceedings (OSTI)

This paper describes the performance and in-flight validation of an instrument mounted in a pallet on the NASA WB-57 research aircraft that measures the sum of gas phase and solid phase water, or total water, in cirrus clouds. Using a heated ...

E. M. Weinstock; J. B. Smith; D. Sayres; J. V. Pittman; N. Allen; J. G. Anderson

2006-11-01T23:59:59.000Z

192

Performance Evaluation of Adaptive Ramp-Metering Algorithms Using Microscopic Traffic Simulation Model  

E-Print Network (OSTI)

Performance Evaluation of Adaptive Ramp-Metering Algorithms Using Microscopic Traffic Simulation metering has undergone significant theoretical developments in recent years. However, the applicability been used in an evaluation study of three well-known adaptive ramp-metering algorithms: ALINEA, BOTTLE

Levinson, David M.

193

A fuzzy MCDM approach for evaluating banking performance based on Balanced Scorecard  

Science Conference Proceedings (OSTI)

The paper proposed a Fuzzy Multiple Criteria Decision Making (FMCDM) approach for banking performance evaluation. Drawing on the four perspectives of a Balanced Scorecard (BSC), this research first summarized the evaluation indexes synthesized from the ... Keywords: Balance Scorecard (BSC), FMCDM, Fuzzy Analytic Hierarchy Process (FAHP), TOPSIS, VIKOR

Hung-Yi Wu; Gwo-Hshiung Tzeng; Yi-Hsuan Chen

2009-08-01T23:59:59.000Z

194

ART CCIM PHASE II-A OFF-GAS SYSTEM EVALUATION TEST REPORT  

SciTech Connect

AREVA Federal Services (AFS) is performing a multi-year, multi-phase Advanced Remediation Technologies (ART) project, sponsored by the U.S. Department of Energy (DOE), to evaluate the feasibility and benefits of replacing the existing joule-heated melter (JHM) used to treat high level waste (HLW) in the Defense Waste Processing Facility (DWPF) at the Savannah River Site with a cold crucible induction melter (CCIM). The AFS ART CCIM project includes several collaborators from AREVA subsidiaries, French companies, and DOE national laboratories. The Savannah River National Laboratory and the Commissariat a l’Energie Atomique (CEA) have performed laboratory-scale studies and testing to determine a suitable, high-waste-loading glass matrix. The Idaho National Laboratory (INL) and CEA are performing CCIM demonstrations at two different pilot scales to assess CCIM design and operation for treating SRS sludge wastes that are currently being treated in the DWPF. SGN is performing engineering studies to validate the feasibility of retrofitting CCIM technology into the DWPF Melter Cell. The long-term project plan includes more lab-testing, pilot- and large-scale demonstrations, and engineering activities to be performed during subsequent project phases. A simulant of the DWPF SB4 feed was successfully fed and melted in a small pilot-scale CCIM system during two test series. The OGSE tests provide initial results that (a) provide melter operating conditions while feeding a DWPF SB4 simulant feed, (b) determine the fate of feed organic and metal feed constituents and metals partitioning, and (c) characterize the melter off-gas source term to a downstream off-gas system. The INL CCIM test system was operated continuously for about 30 hours during the parametric test series, and for about 58 hours during the OGSE test. As the DWPF simulant feed was continuously fed to the melter, the glass level gradually increased until a portion of the molten glass was drained from the melter. The glass drain was operated periodically on-demand. A cold cap of unmelted feed was controlled by adjusting the feedrate and melter power levels to obtain the target molten glass temperatures with varying cold cap levels. Three test conditions were performed per the test plan, during which the melter was operated with a target melt temperature of either 1,250oC or 1,300oC, and with either a partial or complete cold cap of unmelted feed on top of the molten glass. Samples of all input and output streams including the starting glass, the simulant feed, the off-gas particulate matter, product glass, and deposits removed from the crucible and off-gas pipe after the test were collected for analysis.

Nick Soelberg

2009-04-01T23:59:59.000Z

195

VINE-A NUMERICAL CODE FOR SIMULATING ASTROPHYSICAL SYSTEMS USING PARTICLES. II. IMPLEMENTATION AND PERFORMANCE CHARACTERISTICS  

Science Conference Proceedings (OSTI)

We continue our presentation of VINE. In this paper, we begin with a description of relevant architectural properties of the serial and shared memory parallel computers on which VINE is intended to run, and describe their influences on the design of the code itself. We continue with a detailed description of a number of optimizations made to the layout of the particle data in memory and to our implementation of a binary tree used to access that data for use in gravitational force calculations and searches for smoothed particle hydrodynamics (SPH) neighbor particles. We describe the modifications to the code necessary to obtain forces efficiently from special purpose 'GRAPE' hardware, the interfaces required to allow transparent substitution of those forces in the code instead of those obtained from the tree, and the modifications necessary to use both tree and GRAPE together as a fused GRAPE/tree combination. We conclude with an extensive series of performance tests, which demonstrate that the code can be run efficiently and without modification in serial on small workstations or in parallel using the OpenMP compiler directives on large-scale, shared memory parallel machines. We analyze the effects of the code optimizations and estimate that they improve its overall performance by more than an order of magnitude over that obtained by many other tree codes. Scaled parallel performance of the gravity and SPH calculations, together the most costly components of most simulations, is nearly linear up to at least 120 processors on moderate sized test problems using the Origin 3000 architecture, and to the maximum machine sizes available to us on several other architectures. At similar accuracy, performance of VINE, used in GRAPE-tree mode, is approximately a factor 2 slower than that of VINE, used in host-only mode. Further optimizations of the GRAPE/host communications could improve the speed by as much as a factor of 3, but have not yet been implemented in VINE. Finally, we find that although parallel performance on small problems may reach a plateau beyond which more processors bring no additional speedup, performance never decreases, a factor important for running large simulations on many processors with individual time steps, where only a small fraction of the total particles require updates at any given moment.

Nelson, Andrew F. [Los Alamos National Laboratory, HPC-5, MS B272, Los Alamos, NM 87545 (United States); Wetzstein, M. [Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544 (United States); Naab, T. [Universitaets-Sternwarte, Scheinerstr. 1, 81679 Muenchen (Germany)], E-mail: andy.nelson@lanl.gov

2009-10-01T23:59:59.000Z

196

Performance and Electrical Characterization Tests on a Microturbine Commercial Prototype - Part II  

Science Conference Proceedings (OSTI)

EPRI is testing various commercial microturbine generators (MTGs) to verify performance claims, identify any critical technology issues, and assess viability of units for utility applications. This report provides test results on two commercial prototype microturbine generators. The units were identical except that the first unit could only operate in the grid-parallel mode whereas the second unit had the capability to operate in both the grid-parallel and grid-independent modes. The tests continue earli...

2000-12-11T23:59:59.000Z

197

Evaluation of Meteorological Airborne Doppler Radar. Part II: Triple-Doppler Analyses of Air Motions  

Science Conference Proceedings (OSTI)

This is Part II of a paper dealing with the capabilities and use of airborne Doppler radar to observe motions within storms. Part I deals with dual-Doppler analyses of convective storm structure, using airborne and combinations of airborne and ...

Cynthia K. Mueller; Peter H. Hildebrand

1985-09-01T23:59:59.000Z

198

Performance evaluation of competing forecasting models: A multidimensional framework based on MCDA  

Science Conference Proceedings (OSTI)

So far, competing forecasting models are compared to each other using a single criterion at a time, which often leads to different rankings for different criteria - a situation where one cannot make an informed decision as to which model performs best ... Keywords: Crude oil prices, Forecasting models, Multi-Criteria Decision Analysis, Performance evaluation

Bing Xu; Jamal Ouenniche

2012-07-01T23:59:59.000Z

199

An evaluation of potential solar radio emission power threat on GPS and GLONASS performance  

Science Conference Proceedings (OSTI)

The L-band solar radio emission has recently been regarded as a potential threat to stable GPS and GLONASS performance. However, the threat has not been completely investigated or assessed so far. We evaluate in detail the occurrence of GPS/GLONASS signal ... Keywords: GLONASS performance, GPS, Solar flares, Solar radio emission

Vladislav V. Demyanov; Edward L. Afraimovich; Shuanggen Jin

2012-10-01T23:59:59.000Z

200

Evaluating decision making performance in the GDSS environment using data envelopment analysis  

Science Conference Proceedings (OSTI)

We provide a framework to evaluate decision making performance with Group Decision Support Systems (GDSSs) using an overall performance indicator. The indicator is constructed using Data Envelopment Analysis (DEA), which measures the economic efficiency ... Keywords: Data envelopment analysis, Decision efficiency, Group decision support system, Group decisions, Incentive

Reza Barkhi; Yi-Ching Kao

2010-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "ii performance evaluation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

An early performance evaluation of many integrated core architecture based SGI rackable computing system  

Science Conference Proceedings (OSTI)

Intel recently introduced the Xeon Phi coprocessor based on the Many Integrated Core architecture featuring 60 cores with a peak performance of 1.0 Tflop/s. NASA has deployed a 128-node SGI Rackable system where each node has two Intel Xeon E2670 8-core ... Keywords: CFD applications, Intel MIC architecture, Intel Xeon Phi, Intel sandy bridge processor, benchmarking, performance evaluation

Subhash Saini, Haoqiang Jin, Dennis Jespersen, Huiyu Feng, Jahed Djomehri, William Arasin, Robert Hood, Piyush Mehrotra, Rupak Biswas

2013-11-01T23:59:59.000Z

202

Optimisation and performance evaluation of mechanisms for latency tolerance in remote memory access communication on clusters  

Science Conference Proceedings (OSTI)

This paper describes the design and performance evaluation of the mechanisms for latency tolerance in the remote memory access communication on clusters equipped with high-performance networks such as Myrinet. It discusses strategies that bridge ... Keywords: aggregation, cluster computing, communication overlap, latency tolerance, non-blocking, remote memory access

J. Nieplocha; V. Tipparaju; M. Krishnan; G. Santhanaraman; D. K. Panda

2004-03-01T23:59:59.000Z

203

Probabilistic Modeling and Evaluation of the Performance, Emissions, and Cost of Texaco Gasifier-  

E-Print Network (OSTI)

Probabilistic Modeling and Evaluation of the Performance, Emissions, and Cost of Texaco Gasifier.0 DOCUMENTATION OF THE PLANT PERFORMANCE SIMULATION MODEL IN ASPEN OF THE COAL-FUELED TEXACO-GASIFIER BASED IGCC to the Gasifier............................... 40 3.2.2 Gasification

Frey, H. Christopher

204

Disposition of Unirradiated Sodium Bonded EBR-II Driver Fuel Elements and HEU Scrap: Work Performed for FY 2007  

SciTech Connect

Specific surplus high enriched uranium (HEU) materials at the Idaho National Laboratory (INL) Materials and Fuels Complex (MFC) will be transferred to a designated off-site receiving facility. The DOE High Enriched Uranium Disposition Program Office (HDPO) will determine which materials, if any, will be prepared and transferred to an off-site facility for processing and eventual fabrication of fuel for nuclear reactors. These surplus HEU materials include approximately 7200 kg unirradiated sodium-bonded EBR-II driver fuel elements, and nearly 800 kg of HEU casting scrap from the process which formed various sodium-bonded fuels (including the EBR-II driver elements). Before the driver fuel can be packaged for shipment, the fuel elements will require removal of the sodium bond. The HEU scrap will also require repackaging in preparation for off-site transport. Preliminary work on this task was authorized by BWXT Y-12 on Nov 6, 2006 and performed in three areas: • Facility Modifications • Safety Documentation • Project Management

Karen A Moore

2007-04-01T23:59:59.000Z

205

Performance evaluation of two black nickel and two black chrome solar collectors  

DOE Green Energy (OSTI)

This test program was based on the evaluation of four unique solar collectors described as follows: (a) black nickel collector surface with a desiccant drying bed, (b) black nickel collector surface without a desiccant drying bed, (c) black chrome collector surface with a dessicant drying bed, and (d) black chrome collector surface without a desiccant drying bed. The test program included three distinct phases: Initial performance evaluation, natural environmental aging, and post-aging performance evaluation. Results of Phase III testing conclusively indicated a higher normalized efficiency for black chrome surfaces when compared to black nickel. Analysis of these results is shown. The results are tabulated.

Losey, R.

1977-11-01T23:59:59.000Z

206

Laboratory evaluation of fan/filter units' aerodynamic and energy performance  

SciTech Connect

The paper discusses the benefits of having a consistent testing method to characterize aerodynamic and energy performance of FFUs. It presents evaluation methods of laboratory-measured performance of ten relatively new, 1220 mm x 610 mm (or 4 ft x 2 ft) fan-filter units (FFUs), and includes results of a set of relevant metrics such as energy performance indices (EPI) based upon the sample FFUs tested. This paper concludes that there are variations in FFUs' performance, and that using a consistent testing and evaluation method can generate compatible and comparable FFU performance information. The paper also suggests that benefits and opportunities exist for our method of testing FFU energy performance to be integrated in future recommended practices.

Xu, Tengfang; Jeng, Ming-Shan

2004-07-27T23:59:59.000Z

207

Duty cycle testing and performance evaluation of the SM-229 teleoperator  

SciTech Connect

This paper contains the first known experimental studies and analyses of teleoperator performance for specific duty cycles. The results are presented in two distinct areas as position usage patterns, and as three-dimensional power grids. The position usage patterns are a valuable means to assess the available motion range. The power grids are a unique concept for evaluating joint performance. Final conclusions contain recommendations to upgrade the teleoperator for optimum performance. 3 refs., 16 figs.

Stoughton, R.S.; Kuban, D.P.

1985-11-01T23:59:59.000Z

208

Performance evaluation of high-temperature superconducting current leads for micro-SMES systems  

DOE Green Energy (OSTI)

As part of the US Department of Energy`s Superconductivity Technology Program, Argonne National Laboratory and Superconductivity, Inc., are developing high-temperature superconductor (HTS) current leads for application to micro-superconducting magnetic energy storage systems. Two 1500-A HTS leads have been designed and constructed. The performance of the current lead assemblies is being evaluated in a zero-magnetic-field test program that includes assembly procedures, tooling, and quality assurance; thermal and electrical performance; and flow and mechanical characteristics. Results of evaluations performed to data are presented.

Niemann, R.C.; Cha, Y.S.; Hull, J.R. [Argonne National Lab., IL (United States); Buckles, W.E.; Weber, B.R. [Superconductivity, Inc., Middleton, WI (United States); Yang, S.T. [Wisconsin Univ., Madison, WI (United States)

1995-08-01T23:59:59.000Z

209

Performance evaluation of high-temperature superconducting current leads for electric utility SMES systems  

DOE Green Energy (OSTI)

As part of the U.S. Department of Energy`s Superconductivity Technology Program, Argonne National Laboratory and Babcock & Wilcox are developing high-temperature super-conductor (HTS) current leads for application to electric utility superconducting magnetic energy storage systems. A 16,000-A HTS lead has been designed and is being constructed. An evaluation program for component performance was conducted to confirm performance predictions and/or to qualify the design features for construction. Performance of the current lead assemblies will be evaluated in a test program that includes assembly procedures, tooling, and quality assurance; thermal and electrical performance; and flow and mechanical characteristics. Results of the evaluations to date are presented.

Niemann, R.C.; Cha, Y.S.; Hull, J.R. [and others

1995-08-01T23:59:59.000Z

210

Evaluation of replacement protocols and modifications to TCP to enhance ASC Wide Area Network performance.  

SciTech Connect

Historically, TCP/IP has been the protocol suite used to transfer data throughout the Advanced Simulation and Computing (ASC) community. However, TCP was developed many years ago for an environment very different from the ASC Wide Area Network (WAN) of today. There have been numerous publications that hint of better performance if modifications were made to the TCP algorithms or a different protocol was used to transfer data across a high bandwidth, high delay WAN. Since Sandia National Laboratories wants to maximize the ASC WAN performance to support the Thor's Hammer supercomputer, there is strong interest in evaluating modifications to the TCP protocol and in evaluating alternatives to TCP, such as SCTP, to determine if they provide improved performance. Therefore, the goal of this project is to test, evaluate, compare, and report protocol technologies that enhance the performance of the ASC WAN.

Romero, Randy L. Jr.

2004-09-01T23:59:59.000Z

211

Fuzzy Comprehensive Evaluation Model and Influence Factors Analysis on Comprehensive Performance of Green Buildings  

E-Print Network (OSTI)

A green building involves complex system engineering including energy efficiency and energy utilization, water-saving and water utilization, material-saving and material utilization, and land-saving and indoor environment quality and operation management. In order to solve problems of subjectivity, uncertainty and impossibility of quantitative analysis when evaluating green building, this study establishes a multi-level fuzzy evaluation model by means of fuzzy mathematics method to analyze the comprehensive performance of green building according to the index system of “Evaluation Standard for Green Building”. Combined with the technique scheme of the first China green building demonstration project, the result proves to be in accordance with the pre-evaluation of experts. It shows that the fuzzy comprehensive evaluation method is reasonable and feasible to evaluate the comprehensive performance of green building. The evaluation result is the same as the pre-evaluation result. Factors with high weights have larger effects on the results. This proves that the guideline should be the first reference mode in the future engineering practice so as to realize optimization of green building performance.

Sun, J.; Wu, Y.; Dai, Z.; Hao, Y.

2006-01-01T23:59:59.000Z

212

Walla Walla River Basin Fish Screen Evaluations; Nursery Bridge Fishway and Garden City/Lowden II Sites, 2003 Technical Report.  

DOE Green Energy (OSTI)

Pacific Northwest National Laboratory evaluated the fish screens at the Nursery Bridge Fishway and the newly constructed Garden City/Lowden II site west of Walla Walla, Washington, in the Walla Walla River Basin during spring and summer 2003. Both fish screen facilities were examined to determine if they were being effectively operated and maintained to provide for safe fish passage. At the Nursery Bridge Fishway, the screens were evaluated specifically to determine whether the louvers that aid in controlling water flow from behind the screens could be adjusted so that the screens would meet fish protection criteria. Data were collected to determine whether velocities in front of the screens and in the bypasses met current National Oceanic and Atmospheric Administration Fisheries (NOAA Fisheries) (formerly National Marine Fisheries Service (NMFS)) criteria to promote safe and timely fish passage before and after changing the louver settings. Rock weirs downstream of the dam were also evaluated to determine whether they might impede upstream migration of juvenile salmonids during low flow conditions. At the Garden City/Lowden II site, data were collected to establish a baseline for operating conditions and to determine whether any changes in the baffle settings were needed.

Vucelick, J.; McMichael, G. (Pacific Northwest National Laboratory)

2003-11-01T23:59:59.000Z

213

Empirical impact evaluation of the energy savings resulting from BPA's Stage II irrigation system retrofit program: Final report  

SciTech Connect

This report documents the results of an evaluation of the impacts on irrigation system energy consumption of conservation measures installed under the Bonneville Power Administration's Stage II retrofit program. Historical billing data and other farm records provided the basis for this evaluation. A number of different statistical techniques were used to estimate the actual energy savings resulting from the Stage II conservation measures. Results of the study reveal that the methodology used in predicting energy savings resulting from the Stage II program is accurate. The basis for energy savings predictions in the Stage II program are changes in brake horsepower, and, in this study, a 1% change in brake horsepower was found to result in slightly more than a 1% change in energy consumption. Overall, Stage II program conservation measures were found to reduce irrigation system energy use by an average of 34%. The average costs of obtaining these savings were 6 mills (.6 cents) per kWh saved.

Harrer, B.J.; Tawil, J.W.; Lyke, A.J.; Nieves, L.A.; Edin, E.S.; Bailey, B.M.

1987-07-01T23:59:59.000Z

214

Fort Hood Solar Total Energy Project. Volume II. Preliminary design. Part 2. System performance and supporting studies. Final report  

DOE Green Energy (OSTI)

The preliminary design developed for the Solar Total Energy System to be installed at Fort Hood, Texas, is presented. System performance analysis and evaluation are described. Feedback of completed performance analyses on current system design and operating philosophy is discussed. The basic computer simulation techniques and assumptions are described and the resulting energy displacement analysis is presented. Supporting technical studies are presented. These include health and safety and reliability assessments; solar collector component evaluation; weather analysis; and a review of selected trade studies which address significant design alternatives. Additional supporting studies which are generally specific to the installation site are reported. These include solar availability analysis; energy load measurements; environmental impact assessment; life cycle cost and economic analysis; heat transfer fluid testing; meteorological/solar station planning; and information dissemination. (WHK)

None,

1979-01-01T23:59:59.000Z

215

A model for evaluating the social performance of construction waste management  

SciTech Connect

Highlights: Black-Right-Pointing-Pointer Scant attention is paid to social performance of construction waste management (CWM). Black-Right-Pointing-Pointer We develop a model for assessing the social performance of CWM. Black-Right-Pointing-Pointer With the model, the social performance of CWM can be quantitatively simulated. - Abstract: It has been determined by existing literature that a lot of research efforts have been made to the economic performance of construction waste management (CWM), but less attention is paid to investigation of the social performance of CWM. This study therefore attempts to develop a model for quantitatively evaluating the social performance of CWM by using a system dynamics (SD) approach. Firstly, major variables affecting the social performance of CWM are identified and a holistic system for assessing the social performance of CWM is formulated in line with feedback relationships underlying these variables. The developed system is then converted into a SD model through the software iThink. An empirical case study is finally conducted to demonstrate application of the model. Results of model validation indicate that the model is robust and reasonable to reflect the situation of the real system under study. Findings of the case study offer helpful insights into effectively promoting the social performance of CWM of the project investigated. Furthermore, the model exhibits great potential to function as an experimental platform for dynamically evaluating effects of management measures on improving the social performance of CWM of construction projects.

Yuan Hongping, E-mail: hpyuan2005@gmail.com [School of Economics and Management, Southwest Jiaotong University, Chengdu 610031 (China)

2012-06-15T23:59:59.000Z

216

Summary of Degas II performance at the US Strategic Petroleum Reserve Big Hill site.  

Science Conference Proceedings (OSTI)

Crude oil stored at the US Strategic Petroleum Reserve (SPR) requires mitigation procedures to maintain oil vapor pressure within program delivery standards. Crude oil degasification is one effective method for lowering crude oil vapor pressure, and was implemented at the Big Hill SPR site from 2004-2006. Performance monitoring during and after degasification revealed a range of outcomes for caverns that had similar inventory and geometry. This report analyzed data from SPR degasification and developed a simple degas mixing (SDM) model to assist in the analysis. Cavern-scale oil mixing during degassing and existing oil heterogeneity in the caverns were identified as likely causes for the range of behaviors seen. Apparent cavern mixing patterns ranged from near complete mixing to near plug flow, with more mixing leading to less efficient degassing due to degassed oil re-entering the plant before 100% of the cavern oil volume was processed. The report suggests that the new cavern bubble point and vapor pressure regain rate after degassing be based on direct in-cavern measurements after degassing as opposed to using the plant outlet stream properties as a starting point, which understates starting bubble point and overstates vapor pressure regain. Several means to estimate the cavern bubble point after degas in the absence of direct measurement are presented and discussed.

Rudeen, David K. (GRAM, Inc., Albuquerque, NM); Lord, David L.

2007-10-01T23:59:59.000Z

217

Evaluating the Performance of Parallel Programs in a Pseudo-Parallel MPI Environment  

E-Print Network (OSTI)

OF PAPER Evaluating the Performance of Parallel Programs in a Pseudo-Parallel MPI Environment By Erik Demaine This paper presents a system for use with the message-passing standard called MPI (Message Passing Interface) that provides a means of automatically simulating a distributed-memory parallel program. This allows one to evaluate a parallel algorithm without the use of a parallel computer. The system consists of three parts: the network evaluator, logging library, and simulator. The network evaluator is a parallel program that evaluates the network speed of a distributed-memory parallel computer. The logging library, when used, automatically logs the message-passing activity of the running program. The logs are designed so that running the "processors" on a uniprocessor workstation does not affect the contents. The simulator is a serial program that reads a log generated by the logging library and timing results from the network evaluator, and simulates the execution of the parall...

Erik Demaine

1996-01-01T23:59:59.000Z

218

Performance and scalability evaluation of "Big Memory" on Blue Gene Linux.  

Science Conference Proceedings (OSTI)

We address memory performance issues observed in Blue Gene Linux and discuss the design and implementation of 'Big Memory' - an alternative, transparent memory space introduced to eliminate the memory performance issues. We evaluate the performance of Big Memory using custom memory benchmarks, NAS Parallel Benchmarks, and the Parallel Ocean Program, at a scale of up to 4,096 nodes. We find that Big Memory successfully resolves the performance issues normally encountered in Blue Gene Linux. For the ocean simulation program, we even find that Linux with Big Memory provides better scalability than does the lightweight compute node kernel designed solely for high-performance applications. Originally intended exclusively for compute node tasks, our new memory subsystem dramatically improves the performance of certain I/O node applications as well. We demonstrate this performance using the central processor of the LOw Frequency ARray radio telescope as an example.

Yoshii, K.; Iskra, K.; Naik, H.; Beckman, P.; Broekema, P. C. (LCF); ( MCS); (Netherlands Inst. for Radio Astronomy)

2011-05-01T23:59:59.000Z

219

Solar Trough Performance Evaluation: Cooperative Research and Development Final Report, CRADA Number CRD-08-00289  

DOE Green Energy (OSTI)

New HCEs were installed on the hot sides of the thermal loops at SEGS VIII and IX from mid-2007 to mid-2008. Due to significant increases in plant performance, an interest in a further increase performance by installing new HCEs on the cold portions of the loop developed. Although it was assumed that the plant performance would increase, the exact amount was unknown. The objective of this project was to estimate the performance improvements with new HCEs installed on the cold sides of the loop, with performance being evaluated as potential increases in electrical power production (megawatt-hours). A comparison of performance prior to and post installation of new HCEs on the hot sides of the loops was done. For completeness, an estimate of performance losses - such as the optical efficiency, mirror reflectivity, and optical accuracy - was also included in this analysis. National Renewable Energy Laboratory's (NREL's) HCE Survey System was used to determine if the HCEs were hot or cold.

Gray, A.

2011-05-01T23:59:59.000Z

220

Performance prediction evaluation of ceramic materials in point-focusing solar receivers  

DOE Green Energy (OSTI)

A Performance Prediction Model was adapted to evaluate the use of ceramic materials in solar receivers for point-focusing distributed applications. TPS system requirements were determined including the receiver operating environment (such as concentrator performance and environment/natural occurrences) and system operating parameters for various engine types. Preliminary receiver designs evolve from these system requirements. Specific receiver designs evaluated in this report to determine material functional requirements include the NRL solchem converter/heat exchanger, MIT/LL ceramic dome. Black and Veatch/EPRI ceramic tube receiver, and the Sanders honeycomb matrix Brayton receiver. Status of the first phase of a continuing task of evaluation and reporting on high temperature ceramics for solar thermal receiver applications is described. Subsequent reports will develop the Performance Prediction Model in more detail and provide data on its use in the several high temperature receiver and reactor designs planned for or under development.

Ewing, J.; Zwissler, J.

1979-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "ii performance evaluation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Walla Walla River Basin Fish Screen Evaluations, 2003: Nursery Bridge Fishway and Garden City-Lowden II  

DOE Green Energy (OSTI)

The Pacific Northwest National Laboratory (PNNL) evaluated the fish screens at the Nursery Bridge Fishway and at the newly constructed Garden City-Lowden II site west of Walla Walla, Washington in the Walla Walla River Basin during the spring and summer of 2003. Both fish screen facilities were examined to determine if they were being effectively operated and maintained to provide for safe fish passage. At the Nursery Bridge Fishway, the screens were evaluated specifically to determine whether the louvers that aid in controlling water flow from behind the screens could be adjusted so that the screens would meet fish protection criteria. Data were collected to determine whether velocities in front of the screens and in the bypasses met current National Oceanic and Atmospheric Administration Fisheries ((NOAA Fisheries), formerly National Marine Fisheries Service (NMFS)) criteria to promote safe and timely fish passage before and after changing the louver settings. Rock weirs downstream of the dam were also evaluated to determine whether they might impede upstream migration of juvenile salmonids during low flow conditions. At the Garden City-Lowden II site, data were collected to establish a baseline for operating conditions and to determine whether any changes in the baffle settings were needed. Based on the results of our studies in 2003, we concluded: Nursery Bridge Site: (1) 68% of the initial velocity measurements on the west screen exceeded the NOAA Fisheries criteria of 0.4 ft/s for approach velocity; (2) A simple adjustment of the existing louvers was not sufficient to fix the problem; (3) The sediment and debris load in the river upstream of the screens exceeded the design criteria for the site, which had frequent breakdowns in the screen cleaning systems; and (4) The rock weirs downstream of the dam would not be expected to impede upstream movement of juvenile fish during low flow conditions. Garden City-Lowden II: (1) The flat inclined-plate screen design appeared to be efficiently protecting juvenile fish from entrainment, impingement and migration delay; (2) Approach velocities met the NMFS criteria of less than 0.4 ft/s in June, and no change in baffle settings was needed; (3) Sweep velocities were generally lower than approach velocities and did not increase toward the downstream end of the site; and (4) The automated cleaning system at the Garden City-Lowden II site works adequately when sediment loads are low, though its effectiveness at cleaning the screens decreases as sediment and debris loads and algal growth increase.

Vucelick, Jessica A.; McMichael, Geoffrey A.

2003-11-01T23:59:59.000Z

222

Performance Evaluation of a Decoded Instruction Cache for Variable Instruction Length Computers  

Science Conference Proceedings (OSTI)

A Decoded INstruction Cache (DINC) is a buffer between the instruction decoder and other instruction pipeline stages. In this paper, we explain how techniques that reduce the branch penalty on a DINC, can improve CPU performance. We also analyze the ... Keywords: UNIX applications., buffer storage, computer architecture, decoded instruction cache, instruction decoder, instruction length distribution, instruction pipeline stages, performance evaluation, trace driven simulations, variable instruction length computers

G. D. Intrater; I. Y. Spillinger

1994-10-01T23:59:59.000Z

223

Hydrometeorological Short-Range Ensemble Forecasts in Complex Terrain. Part II: Economic Evaluation  

Science Conference Proceedings (OSTI)

Two economic models are employed to perform a value assessment of short-range ensemble forecasts of 24-h precipitation probabilities for hydroelectric reservoir operation.

Doug McCollor; Roland Stull

2008-08-01T23:59:59.000Z

224

Microphysics of Clouds with the Relaxed Arakawa–Schubert Scheme (McRAS). Part II: Implementation and Performance in GEOS II GCM  

Science Conference Proceedings (OSTI)

A prognostic cloud scheme named the Microphysics of Clouds with the Relaxed Arakawa–Schubert Scheme (McRAS) and the Simple Biosphere Model have been implemented in a version of the Goddard Earth Observing System (GEOS) II GCM at a 4° latitude × 5°...

Y. C. Sud; G. K. Walker

1999-09-01T23:59:59.000Z

225

Evaluation of Radar Multiple-Scattering Effects from a GPM Perspective. Part II: Model Results  

Science Conference Proceedings (OSTI)

Multiple-scattering effects as sensed by radars in configurations useful in the context of the Global Precipitation Mission (GPM) are evaluated for a range of meteorological profiles extracted from four different cloud-resolving model ...

A. Battaglia; M. O. Ajewole; C. Simmer

2006-12-01T23:59:59.000Z

226

Performance and life evaluation of nickel/iron battery technology for dual shaft electric propulsion vehicle  

SciTech Connect

As part of a cost-shared contract between the US Department of Energy (Office of Transportation Systems) and Eaton Corp. to develop an advanced dual shaft electric propulsion (DSEP) vehicle, several nickel/iron (Ni/Fe) batteries were designed and procured from Eagle-Picher Industries (EPI) for evaluation and vehicle use. In March 1986, two individual 5-cell Ni/Fe modules and a 140-cell (28-module) battery pack were delivered to Argonne for evaluation. Performance characterization tests were conducted on the two modules and life testing performed on the battery pack. Module performance testing was completed in early 1987 after about 215 cycles of operation. Each module still retained {approximately}90% of its initial 180-Ah capacity at the end of testing ({approximately}163 Ah/970 Wh). Life evaluation of the 168-V, 28-kWh battery pack was conducted with driving profile discharges. A 1377-s power profile that represented the battery load in a DSEP vehicle undergoing a Federal Urban Driving Schedule (FUDS) was used. Testing was temporarily suspended in October 1987 after the battery pack had accumulated 502 cycles (209 cycles in 1986). After a three-month trickle charge ({approximately}3 A), testing was resumed (January 1988) with driving profile discharges. In March 1988, battery performance was being limited by three modules. After 545 cycles, the three modules were removed from the pack. Battery performance, however, continued to decline and another four modules were removed in September 1988 (645 cycles). Several remaining modules started to exhibit a high self-discharge loss and a capacity of only 119 Ah (15.1 kWh) could be achieved. The life evaluation was halted in October 1988 after 661 cycles had been accumulated. This report outlines the test activities and presents the performance results of the individual modules and the battery pack involved in this technology evaluation. 18 figs., 4 tabs.

DeLuca, W. (ed.)

1990-05-01T23:59:59.000Z

227

Three-Dimensional Numerical Evaluation of Thermal Performance of Uninsulated Wall Assemblies: Preprint  

SciTech Connect

This study describes a detailed three-dimensional computational fluid dynamics modeling to evaluate the thermal performance of uninsulated wall assemblies accounting for conduction through framing, convection, and radiation. The model allows for material properties variations with temperature. Parameters that were varied in the study include ambient outdoor temperature and cavity surface emissivity. Understanding the thermal performance of uninsulated wall cavities is essential for accurate prediction of energy use in residential buildings. The results can serve as input for building energy simulation tools for modeling the temperature dependent energy performance of homes with uninsulated walls.

Ridouane, E. H.; Bianchi, M.

2011-11-01T23:59:59.000Z

228

Thermal performance evaluation of the solargenics solar collector at outdoor conditions  

DOE Green Energy (OSTI)

Information contained within this report presents test procedures used during the performance of an evaluation program. The test program was conducted to obtain the following performance data and information on the solar collector. (1) Thermal performance data under outdoor conditions, (2) Structural behavior of collector under static conditions, and (3) Effects of long term exposure to material weathering elements. The Solargenics is a liquid, single-glazed, flat-plate collector. Approximate dimensions of each collector are 240 inches long, 36 inches wide, and 3.5 inches in depth.

Not Available

1978-12-01T23:59:59.000Z

229

Evaluation of hydrothermal resources of North Dakota. Phase II. Final report  

SciTech Connect

The Phase II activities dealt with three main topical areas: geothermal gradient and heat-flow studies, stratigraphic studies, and water quality studies. Efforts were concentrated on Mesozoic and Cenozoic rocks. The geothermal gradient and heat-flow studies involved running temperature logs in groundwater observation holes in areas of interest, and locating, obtaining access to, and casing holes of convenience to be used as heat-flow determination sites. The stratigraphic and water quality studies involved two main efforts: updating and expanding WELLFILE and assembling a computer library system (WELLCAT) for all water wells drilled in the state. WATERCAT combines data from the United States Geological Survey Water Resources Division's WATSTOR and GWST computer libraries; and includes physical, stratigraphic, and water quality data. Goals, methods, and results are presented.

Harris, K.L.; Howell, F.L.; Winczewski, L.M.; Wartman, B.L.; Umphrey, H.R.; Anderson, S.B.

1981-06-01T23:59:59.000Z

230

Evaluation of hydrothermal resources of North Dakota. Phase II. Final report  

DOE Green Energy (OSTI)

The Phase II activities dealt with three main topical areas: geothermal gradient and heat-flow studies, stratigraphic studies, and water quality studies. Efforts were concentrated on Mesozoic and Cenozoic rocks. The geothermal gradient and heat-flow studies involved running temperature logs in groundwater observation holes in areas of interest, and locating, obtaining access to, and casing holes of convenience to be used as heat-flow determination sites. The stratigraphic and water quality studies involved two main efforts: updating and expanding WELLFILE and assembling a computer library system (WELLCAT) for all water wells drilled in the state. WATERCAT combines data from the United States Geological Survey Water Resources Division's WATSTOR and GWST computer libraries; and includes physical, stratigraphic, and water quality data. Goals, methods, and results are presented.

Harris, K.L.; Howell, F.L.; Winczewski, L.M.; Wartman, B.L.; Umphrey, H.R.; Anderson, S.B.

1981-06-01T23:59:59.000Z

231

Performance Evaluation of Advanced LLW Liquid Processing Technology: Boiling Water Reactor Liquid Processing  

Science Conference Proceedings (OSTI)

This report provides condensed information on boiling water reactor (BWR) membrane based liquid radwaste processing systems. The report presents specific details of the technology, including design, configuration, and performance. This information provides nuclear plant personnel with data useful in evaluating the merits of applying advanced processes at their plant.

2001-11-26T23:59:59.000Z

232

Performance Test Protocol for Evaluating Inverters Used in Grid-Connected  

E-Print Network (OSTI)

Performance Test Protocol for Evaluating Inverters Used in Grid-Connected Photovoltaic Systems....................................................................................................................................... 36 A1 Simplified Photovoltaic I-V Curve Model Inverters Used in Grid-Connected Photovoltaic Systems 1 Overview One measure of the maturity of an industry

233

Design and Performance Evaluation of an Hybrid Reservation-Polling MAC Protocol for Power-Line  

E-Print Network (OSTI)

Units) in a low-voltage power grid, share the transmission capacity of the power-line network. To make of data. Since wires exist to every household connected to the low-voltage grid, PLC systems can provideDesign and Performance Evaluation of an Hybrid Reservation-Polling MAC Protocol for Power-Line

Tinnirello, Ilenia

234

Performance evaluation of reliability aware photonic Network-on-Chip architectures  

Science Conference Proceedings (OSTI)

Network-on-Chip (NoC) is the preferred communication backbone for modern multicore chips. However, the multi-hop data transmission using wireline interconnects result in high energy dissipation and latency. Photonic interconnects have emerged as a promising ... Keywords: performance evaluation,Network-on-Chip,photonic interconnects

Pradheep Khanna Kaliraj; Patrick Sieber; Amlan Ganguly; Ipshita Datta; Debasish Datta

2012-06-01T23:59:59.000Z

235

Performance evaluation of indoor localization techniques based on RF power measurements from active or passive devices  

Science Conference Proceedings (OSTI)

The performance of networks for indoor localization based on RF power measurements from active or passive devices is evaluated in terms of the accuracy, complexity, and costs. In the active device case, the terminal to be located measures the power transmitted ...

Damiano De Luca; Franco Mazzenga; Cristiano Monti; Marco Vari

2006-01-01T23:59:59.000Z

236

Evaluating the Energy Performance of the First Generation of LEED-Certified Commercial Buildings  

E-Print Network (OSTI)

Evaluating the Energy Performance of the First Generation of LEED-Certified Commercial Buildings Rick Diamond, Lawrence Berkeley National Laboratory Mike Opitz and Tom Hicks, U.S. Green Building ABSTRACT Over three hundred buildings have been certified under the Leadership in Energy and Environmental

Diamond, Richard

237

On performance evaluation of handling streaming traffic in IP networks using TFRC protocol  

Science Conference Proceedings (OSTI)

This paper deals with the performance evaluation of handling streaming traffic in IP best effort networks using TFRC protocol. In our studies we check and discuss an influence of video on demand traffic and different network conditions on TFRC congestion ... Keywords: IP network, TCP-friendly, best-effort, video on demand

Kacper Kurowski; Halina Tarasiuk

2008-05-01T23:59:59.000Z

238

Performance evaluation of low energy adaptive clustering hierarchy protocol for wireless sensor networks  

Science Conference Proceedings (OSTI)

Clustering of sensor nodes is an effective technique for achieving prolonged network lifetime, scalability, and load balancing. This paper focuses on the performance evaluation of the Low Energy Adaptive Clustering Hierarchy (LEACH) protocol that can ... Keywords: clustering, energy consumption, network lifetime, wireless sensor networks

D. A. Vidhate; A. K. Patil; S. S. Pophale

2010-02-01T23:59:59.000Z

239

TECHNIQUES FOR EVALUATING THE PERFORMANCE OF PRE-TIMED RAMP METERS  

E-Print Network (OSTI)

1 TECHNIQUES FOR EVALUATING THE PERFORMANCE OF PRE-TIMED RAMP METERS USING ARCHIVED ITS DATA Robert: 503-725-8480 Email: elgeneid@pdx.edu ABSTRACT Pre-Timed Ramp Metering (PRM) is a traffic management efficient, effective, equitable and sustainable. Pre-Timed Ramp Metering (PRM) is a traffic management

Bertini, Robert L.

240

Performance evaluation of wireless sensor networks in realistic wildfire simulation scenarios  

Science Conference Proceedings (OSTI)

Forest fires lead to high amount of environmental and economic loss all over the world. Prevention and early detection efforts aim to eliminate or minimize the damage that will be caused by a fire incident. Current surveillance systems for forest fires ... Keywords: fire propagation estimation, performance evaluation, simulation, wildfire, wireless sensor networks

Sinan Isik, Mehmet Yunus Donmez, Can Tunca, Cem Ersoy

2013-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "ii performance evaluation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Modeling Heavy-tails in Traffic Sources for Network Performance Evaluation  

E-Print Network (OSTI)

1 Modeling Heavy-tails in Traffic Sources for Network Performance Evaluation Vaidyanathan Ramaswami, Kaustubh Jain, Rittwik Jana, Vaneet Aggarwal Abstract--Heavy tails in work loads (file sizes, flow lengths heavy tailed random variables. The fits obtained are validated using separate training and test data

Greenberg, Albert

242

Design verification and performance evaluation of an enhanced wideband CDMA receiver using channel measurements  

Science Conference Proceedings (OSTI)

The spatio-temporal array receiver (STAR) decomposes generic wideband CDMA channel responses across various parameter dimensions (e.g., time delays, multipath components, etc.) and extracts the associated time-varying parameters (i.e., analysis) before ... Keywords: analysis/synthesis, channel measurements, design verification, dynamic channel characterization, performance evaluation, wideband CDMA

Karim Cheikhrouhou; Sofiéne Affes; Ahmed Elderini; Besma Smida; Paul Mermelstein; Belhassen Sultana; Venkatesh Sampath

2005-01-01T23:59:59.000Z

243

Processing and Performance II  

Science Conference Proceedings (OSTI)

Oct 10, 2012... over conventional high-strength steels used for current automobiles. ... of Norfolk Southern's new public relations effort “21st Century Steam.

244

Performance and Applications II  

Science Conference Proceedings (OSTI)

... Inland Steel Company, Research Laboratories, 3001 E. Columbus Drive, East Chicago, IN 46312, USA; T. G. Oakwood, G. Krauss, Colorado School of Mines, ...

245

Lawrence Berkeley Laboratory, Berkeley, California solar energy system performance evaluation, July 1980-June 1981  

SciTech Connect

The Lawrence Berkeley Laboratory site is an office building in California with an active solar energy system designed to supply from 23 to 33% of the space heating load and part of the hot water load. The solar heating system is equipped with 1428 square feet of flat-plate collectors, a 2000-gallon water storage tank, and two gas-fired boilers to supply auxiliary heat for both space heating and domestic hot water. Poor performance is reported, with the solar fraction being only 4%. Also given are the solar savings ratio, conventional fuel savings, system performance factor, and the coefficient of performance. The performance data are given for the collector, storage, solar water heating and solar space heating subsystems as well as the total system. Typical system operation and solar energy utilization are briefly described. The system design, performance evaluation techniques, weather data, and sensor technology are presented. (LEW)

Wetzel, P.E.

1981-01-01T23:59:59.000Z

246

Lithium/Manganese Dioxide (Li/MnO(2)) Battery Performance Evaluation: Final Report  

DOE Green Energy (OSTI)

In February 1997, under the auspices of the Product Realization Program, an initiative to develop performance models for lithium/manganese dioxide-based batteries began. As a part of this initiative, the performance characteristics of the cells under a variety of conditions were determined, both for model development and for model validation. As a direct result of this work, it became apparent that possible Defense Program (DP) uses for batteries based on this cell chemistry existed. A larger effort aimed at mapping the performance envelope of this chemistry was initiated in order to assess the practicality of this cell chemistry, not only for DP applications, but also for other uses. The work performed included an evaluation of the cell performance as a function of a number of variables, including cell size, manufacturer, current, pulse loads, constant current loads, safety, etc. In addition, the development of new evaluation techniques that would apply to any battery system, such as those related to reliability assessments began. This report describes the results of these evaluations.

Ingersoll, D.; Clark, N.H.

1999-04-01T23:59:59.000Z

247

Evaluation of the existing performance models used for pavement management by the Texas Department of Transportation  

E-Print Network (OSTI)

The pavement management information system (PMIS) and hics. the flexible pavement design software, FPS-19, used by the Texas Department of Transportation (TxDOT) for pavement management at network and project level respectively, generally do not give the same answer when the same set of data are used. This thesis is a part of the study to develop an approach for integrating pavement management systems at the two levels. The objective of the study is to identify which performance models were working satisfactorily and which needed to be modified. The performance models for ride quality (serviceability index for FPS-19), shallow rutting, deep rutting, and alligator cracking, which are the fundamental performance measures of the flexible pavements, were selected for evaluation. From the family of flexible pavements, the newly constructed pavements with untreated base were considered in the evaluation. A sensitivity analysis was performed to determine the relative importance of the input variables to FPS-I9 program. To reduce the number of problems to a manageable size, a one factor at a time approach was used. The F-statistics corresponding to the relevant input variables were used to determine the ranks. It was found that reliability level is the most important factor in FPS-19, followed by twenty-year projected axle repetition (ESAL). A research database was created by extracting data from the Long Term Pavement Performance (LTPP) database for pavement sections in Texas. A11 data items except rutting data were extracted using the software, Database 97. Rutting data was obtained from the LTPP regional office. Data from sixteen pavement sections were available for the evaluation. Elastic moduli of pavement layers and subgrades were back-calculated using MODULUS software. The selected performance models were evaluated using trend analyses, statistical hypotheses tests, percent difference, and estimated reliability. Due to the lack of data, all members of the performance model families could not be checked. It was observed that none of the selected performance models of PMIS and FPS-I9 is predicting the values observed at the LTPP sites though some of them are predicting better than others. Therefore, improvements are recommended for all the evaluated performance models.

Mukherjee, Biswajit

1998-01-01T23:59:59.000Z

248

Evaluation of NaK as the Primary Coolant for the SNAP II System  

SciTech Connect

An evaluation was made of the use of NaK as the primary coolant for the SNAP-2 system. Pumping-power limitations based on the mercury Rankine cycle are analyzed. Problems pertinent to any design-specification modifications are reviewed.

Wallerstedt, R.

1959-07-10T23:59:59.000Z

249

Generation and evaluation of orthogonal polynomials in discrete Sobolev spaces II: numerical stability  

Science Conference Proceedings (OSTI)

In this paper, we concern ourselves with the determination and evaluation of polynomials that are orthogonal with respect to a general discrete Sobolev inner product, that is, an ordinary inner product on the real line plus a finite sum of atomic inner ... Keywords: 42C10, 65D20, 65G50, Recurrence relations, Rounding errors, Sobolev orthogonal polynomials

R. Barrio; S. Serrano

2005-09-01T23:59:59.000Z

250

Fast computation of the performance evaluation of biometric systems: application to multibiometric  

E-Print Network (OSTI)

The performance evaluation of biometric systems is a crucial step when designing and evaluating such systems. The evaluation process uses the Equal Error Rate (EER) metric proposed by the International Organization for Standardization (ISO/IEC). The EER metric is a powerful metric which allows easily comparing and evaluating biometric systems. However, the computation time of the EER is, most of the time, very intensive. In this paper, we propose a fast method which computes an approximated value of the EER. We illustrate the benefit of the proposed method on two applications: the computing of non parametric confidence intervals and the use of genetic algorithms to compute the parameters of fusion functions. Experimental results show the superiority of the proposed EER approximation method in term of computing time, and the interest of its use to reduce the learning of parameters with genetic algorithms. The proposed method opens new perspectives for the development of secure multibiometrics systems by speedi...

Giot, Romain; Rosenberger, Christophe

2012-01-01T23:59:59.000Z

251

THE USE OF DIGITAL RADIOGRAPHY IN THE EVALUATION OF RADIOACTIVE MATERIALS PACKAGING PERFORMANCE TESTING  

Science Conference Proceedings (OSTI)

New designs of radioactive material shipping packages are required to be evaluated in accordance with 10 CFR Part 71, ''Packaging and Transportation of Radioactive Material''. This paper will discuss the use of digital radiography to evaluate the effects of the tests required by 10 CFR 71.71, Normal Conditions of Transport (NCT), and 10 CFR 71.73, Hypothetical Accident Conditions (HAC). One acceptable means of evaluating packaging performance is to subject packagings to the series of NCT and HAC tests. The evaluation includes a determination of the effect on the packaging by the conditions and tests. That determination has required that packagings be cut and sectioned to learn the actual effects on internal components. Digital radiography permits the examination of internal packaging components without sectioning a package. This allows a single package to be subjected to a series of tests. After each test, the package is digitally radiographed and the effects of particular tests evaluated. Radiography reduces the number of packages required for testing and also reduces labor and materials required to section and evaluate numerous packages. This paper will include a description of the digital radiography equipment used in the testing and evaluation of the 9977 and 9978 packages at SRNL. The equipment is capable of making a single radiograph of a full-sized package in one exposure. Radiographs will be compared to sectioned packages that show actual conditions compared to radiographic images.

May, C; Lawrence Gelder, L; Boyd Howard, B

2007-03-22T23:59:59.000Z

252

Performance Evaluation of Real Time Formaldehyde Monitors: PTR-MS and  

NLE Websites -- All DOE Office Websites (Extended Search)

Performance Evaluation of Real Time Formaldehyde Monitors: PTR-MS and Performance Evaluation of Real Time Formaldehyde Monitors: PTR-MS and Interscan 4160-500B Portable Monitor Title Performance Evaluation of Real Time Formaldehyde Monitors: PTR-MS and Interscan 4160-500B Portable Monitor Publication Type Report LBNL Report Number LBNL-6357E Year of Publication 2013 Authors Sidheswaran, Meera A., Sebastian Cohn, Douglas P. Sullivan, and Lara A. Gundel Publisher Lawrence Berkeley National Laboratory City Berkeley Abstract Executive Summary Exposure to volatile organic compounds (VOCs) in buildings is a health hazard. Of particular concern is formaldehyde, a ubiquitous carcinogen emitted from furnishings and adhesives in homes and offices. Practitioners and researchers in the area of building performance are very interested in measuring formaldehyde in homes, and they need instrumentation that responds immediately. Current formaldehyde monitoring techniques are hampered by interfering substances in the sample airstream, compromising measurement accuracy and leading to drift. Many experts are now using a tabletop real-time formaldehyde instrument, the Interscan 4160-2, that LBNL researchers have found to be very sensitive to water vapor and low levels of volatile organic compounds (VOCs). Unless ways are found to remove these interferences, relying on the Interscan's readings in buildings will lead to the wrong conclusions about formaldehyde levels and could trigger subsequent unnecessary expense and/or inappropriate responses.

253

An evaluation of Java's I/O capabilities for high-performance computing.  

SciTech Connect

Java is quickly becoming the preferred language for writing distributed applications because of its inherent support for programming on distributed platforms. In particular, Java provides compile-time and run-time security, automatic garbage collection, inherent support for multithreading, support for persistent objects and object migration, and portability. Given these significant advantages of Java, there is a growing interest in using Java for high-performance computing applications. To be successful in the high-performance computing domain, however, Java must have the capability to efficiently handle the significant I/O requirements commonly found in high-performance computing applications. While there has been significant research in high-performance I/O using languages such as C, C++, and Fortran, there has been relatively little research into the I/O capabilities of Java. In this paper, we evaluate the I/O capabilities of Java for high-performance computing. We examine several approaches that attempt to provide high-performance I/O--many of which are not obvious at first glance--and investigate their performance in both parallel and multithreaded environments. We also provide suggestions for expanding the I/O capabilities of Java to better support the needs of high-performance computing applications.

Dickens, P. M.; Thakur, R.

2000-11-10T23:59:59.000Z

254

Novel Scanning Lens Instrument for Evaluating Fresnel Lens Performance: Equipment Development and Initial Results (Presentation)  

SciTech Connect

A system dedicated to the optical transmittance characterization of Fresnel lenses has been developed at NREL, in collaboration with the UPM. The system quantifies the optical efficiency of the lens by generating a performance map. The shape of the focused spot may also be analyzed to understand change in the lens performance. The primary instrument components (lasers and CCD detector) have been characterized to confirm their capability for performing optical transmittance measurements. Measurements performed on SoG and PMMA lenses subject to a variety of indoor conditions (e.g., UV and damp heat) identified differences in the optical efficiency of the evaluated lenses, demonstrating the ability of the Scanning Lens Instrument (SLI) to distinguish between the aged lenses.

Herrero, R.; Miller, D. C.; Kurtz, S. R.; Anton, I.; Sala, G.

2013-07-01T23:59:59.000Z

255

SCALE: A modular code system for performing standardized computer analyses for licensing evaluation: Functional modules F1-F8  

SciTech Connect

This Manual represents Revision 5 of the user documentation for the modular code system referred to as SCALE. The history of the SCALE code system dates back to 1969 when the current Computational Physics and Engineering Division at Oak Ridge National Laboratory (ORNL) began providing the transportation package certification staff at the U.S. Atomic Energy Commission with computational support in the use of the new KENO code for performing criticality safety assessments with the statistical Monte Carlo method. From 1969 to 1976 the certification staff relied on the ORNL staff to assist them in the correct use of codes and data for criticality, shielding, and heat transfer analyses of transportation packages. However, the certification staff learned that, with only occasional use of the codes, it was difficult to become proficient in performing the calculations often needed for an independent safety review. Thus, shortly after the move of the certification staff to the U.S. Nuclear Regulatory Commission (NRC), the NRC staff proposed the development of an easy-to-use analysis system that provided the technical capabilities of the individual modules with which they were familiar. With this proposal, the concept of the Standardized Computer Analyses for Licensing Evaluation (SCALE) code system was born. This volume consists of the section of the manual dealing with eight of the functional modules in the code. Those are: BONAMI - resonance self-shielding by the Bondarenko method; NITAWL-II - SCALE system module for performing resonance shielding and working library production; XSDRNPM - a one-dimensional discrete-ordinates code for transport analysis; XSDOSE - a module for calculating fluxes and dose rates at points outside a shield; KENO IV/S - an improved monte carlo criticality program; COUPLE; ORIGEN-S - SCALE system module to calculate fuel depletion, actinide transmutation, fission product buildup and decay, and associated radiation source terms; ICE.

NONE

1997-03-01T23:59:59.000Z

256

Solar energy system performance evaluation: Aratex Services, Inc. , Industrial Laundry, Fresno, California, November 1977--May 1978  

SciTech Connect

An operational summary of how the solar energy system installed at ARATEX Services Inc., an industrial laundry located in Fresno, California, performed during the report period is provided. This analysis is made by evaluation of measured system performance and by comparison of measured climatic data with long term average climatic conditions. Performance of major subsystems is also presented to illustrate their operation. Included are: a brief system description, review of actual system performance during the report period, analysis of performance based on evaluation of meteorological load and operational conditions, and an overall discussion of results. Monthly values of average daily insolation and average ambient temperature measured at the ARATEX site are presented. Also presented are the long-term, average monthly values for these climatic parameters. The ARATEX system collected an average of 67 million Btu of solar energy per month. The available solar radiation was 75 percent of the long term average. The use of both a solar energy and heat recovery system at ARATEX has combined to reduce the total load of a system without heat recovery by approximately 45 percent. The solar energy system alone contributed 16 percent of the total hot water load at the site. Damage to the Lexan covers on fourteen of the total 140 collectors was reported. This damage is believed to have been caused by winds.

1978-07-01T23:59:59.000Z

257

Spearfish High School, Sparfish, South Dakota solar energy system performance evaluation, September 1980-June 1981  

DOE Green Energy (OSTI)

Spearfish High School in South Dakota contains 43,000 square feet of conditioned space. Its active solar energy system is designed to supply 57% of the space heating and 50% of the hot water demand. The system is equipped with 8034 square feet of flat plate collectors, 4017 cubic feet of rock bin sensible heat storage, and auxiliary equipment including 8 heat pumps, 6 of which are solar supplied and instrumented, air conditioning units, and natural-gas-fired boilers. Performance data are given for the system including the solar fraction, solar savings ratio, conventional fuel savings, system performance factor and solar system coefficient of performance. Insolation, solar energy utilization and operation data are also given. The performance of the collector, storage, domestic hot water and space heating subsystems, the operating energy, energy savings, and weather conditions are also evaluated. Appended are a system description, performance evaluation techniques and equations, site history, long-term weather data, sensor technology, and typical monthly data. (LEW)

Howard, B.D.

1981-01-01T23:59:59.000Z

258

Solar-energy system performance evaluation. San Anselmo School, San Jose, California, July 1980-March 1981  

DOE Green Energy (OSTI)

The San Anselmo School is a one-story, brick elementary school building located in San Jose, California. The active solar energy system is designed to supply 70% of the heating load and 72% of the cooling load. It is equipped with 3.740 square feet of evacuated tube collectors, 2175-gallon tank for storage, four auxiliary gas-fired absorption chiller/heaters, and a solar-supplied absorption chiller. The measured heating and cooling solar fractions were 9% and 19%, respectively, for an overall solar fraction of 16%, the lowered performance being attributed to severe system control problems. Performance data include the solar savings ratio, conventional fuel savings, system performance factor, and solar system coefficient of performance. Performance data are presented for the overall system and for each subsystem. System operation and solar energy utilization data are included. Also included are a description of the system, performance evaluation techniques, sensor technology, and typical performance data for a month. Weather data are also tabulated. (LEW)

Pakkala, P.A.

1981-01-01T23:59:59.000Z

259

Interim Test Procedures for Evaluating Electrical Performance and Grid Integration of Vehicle-to-Grid Applications  

NLE Websites -- All DOE Office Websites (Extended Search)

Interim Test Procedures for Interim Test Procedures for Evaluating Electrical Performance and Grid Integration of Vehicle-to-Grid Applications S. Chakraborty, W. Kramer, B. Kroposki, G. Martin, P. McNutt, M. Kuss, T. Markel, and A. Hoke Technical Report NREL/TP-5500-51001 June 2011 NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency & Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. National Renewable Energy Laboratory 1617 Cole Boulevard Golden, Colorado 80401 303-275-3000 * www.nrel.gov Contract No. DE-AC36-08GO28308 Interim Test Procedures for Evaluating Electrical Performance and Grid Integration of Vehicle-to-Grid Applications S. Chakraborty, W. Kramer, B. Kroposki, G. Martin, P. McNutt, M. Kuss, T. Markel,

260

HomePlug Green PHY Performance Evaluation: An Assessment at Sampled Field Sites  

Science Conference Proceedings (OSTI)

The HomePlug Green PHY specification was created by the HomePlug Powerline Alliance to target smart grid and smart energy applications. The focus of the Green PHY implementation was cost, coverage, and performance driven by input from utilities and end device manufacturers.Electric Power Research Institute (EPRI) member utilities requested an evaluation of Green PHY in some real-world scenarios to determine the capabilities of devices using this specification. To accomplish this, the ...

2013-04-15T23:59:59.000Z

Note: This page contains sample records for the topic "ii performance evaluation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Evaluating Faculty Performance: A Comparison of Behaviorally Anchored Rating Scales Developed for Western Kentucky University Psychology Department Faculty.  

E-Print Network (OSTI)

??The current study consisted of a comparison of Behaviorally Anchored Rating Scales (BARS) developed in 2001 and 2008 for the evaluation of the performance of… (more)

Yanul, Travis

2008-01-01T23:59:59.000Z

262

Performance evaluation of the technical capabilities of DOE sites for disposal of mixed low-level waste: Volume 3, Site evaluations  

Science Conference Proceedings (OSTI)

A team of analysts designed and conducted a performance evaluation to estimate the technical capabilities of fifteen Department of Energy sites for disposal of mixed low-level waste (i.e., waste that contains both low-level radioactive materials and hazardous constituents). Volume 1 summarizes the process for selecting the fifteen sites, the methodology used in the evaluation, and the conclusions derived from the evaluation. Volume 2 provides details about the site-selection process, the performance-evaluation methodology, and the overall results of the analysis. Volume 3 contains detailed evaluations of the fifteen sites and discussion of the results for each site.

Waters, R.D.; Gruebel, M.M. [eds.] [eds.

1996-03-01T23:59:59.000Z

263

Windows NT Workstation Performance Evaluation Based on Pro/E 2000i BENCHMARK  

SciTech Connect

A performance evaluation of several computers was necessary, so an evaluation program, or benchmark, was run on each computer to determine maximum possible performance. The program was used to test the Computer Aided Drafting (CAD) ability of each computer by monitoring the speed with which several functions were executed. The main objective of the benchmarking program was to record assembly loading times and image regeneration times and then compile a composite score that could be compared with the same tests on other computers. The three computers that were tested were the Compaq AP550, the SGI 230, and the Hewlett-PackardP750C. The Compaq and SGI computers each had a Pentium III 733mhz processor, while the Hewlett-Packard had a Pentium III 750mhz processor. The size and speed of Random Access Memory (RAM) in each computer varied, as did the type of graphics card. Each computer that was tested was using Windows NT 4.0 and Pro/ENGINEER{trademark} 2000i CAD benchmark software provided by Standard Performance Evaluation Corporation (SPEC). The benchmarking program came with its own assembly, automatically loaded and ran tests on the assembly, then compiled the time each test took to complete. Due to the automation of the tests, any sort of user error affecting test scores was virtually eliminated. After all the tests were completed, scores were then compiled and compared. The Silicon Graphics 230 was by far the overall winner with a composite score of 8.57. The Compaq AP550 was next with a score of 5.19, while the Hewlett-Packard P750C performed dismally, achieving a score of 3.34. Several factors, including motherboard chipset, graphics card, and the size and speed of RAM, were involved in the differing scores of the three machines. Surprisingly the Hewlett-Packard, which had the fastest processor, came back with the lowest score. The above factors most likely contributed to the poor performance of the Hewlett-Packard. Based on the results of the benchmark test, the SGI 230 appears to be the best CAD software solution. The Hewlett-Packard most likely performed poorly due to the fact that it was only running a 100mhz Front Side Bus (FSB), while the SGI machine was running at a 133mhz. The Compaq was using a new type of RAM called RDRAM. While this RAM was at first perceived to be a great performer, various benchmarks, including this one, have found that the computers using RDRAM really only achieve average performance.

DAVIS,SEAN M.

2000-08-02T23:59:59.000Z

264

Solar Energy system performance evaluation: El Toro, California, March 1981-November 1981  

DOE Green Energy (OSTI)

The El Toro Library is a public library facility in California with an active solar energy system designed to supply 97% of the heating load and 60% of the cooling load. The system is equipped with 1427 square feet of evacuated tube collectors, a 1500-gallon steel storage tank, and an auxiliary natural-gas-fired heating unit. During the period from March 1981 through November 1981 the system supplied only 16% of the space cooling load, far short of the 60% design value. Problems are reported related to control of a valve and of collection, low absorption chiller coefficient of performance during part of the period, and small collector area. Performance data are reported for the system, including solar savings ratio, conventional fuel savings, system performance factor, system coefficient of performance, solar energy utilization, and system operation. Subsystem performance data are also given for the collector, storage, and space cooling subsystems and absorption chiller. The system is briefly described along with performance evaluation techniques and sensors, and typical data are presented for one month. Some weather data are also included. (LEW)

Pakkala, P.A.

1981-01-01T23:59:59.000Z

265

Solar energy system performance evaluation, Hogate's Restaurant, Washington, D. C. January 1980-December 1980  

Science Conference Proceedings (OSTI)

The Hogate's Restaurant site is a business establishment which serves as a restaurant on the waterfront in Washington, D.C. It is part of the National Solar Data Network. The active solar energy system is designed to supply 64% of the restaurant's hot water. It is equipped with 6,254 square feet of liquid flat-plate collectors, two 5,000-gallon tanks for storage, and an auxiliary gas boiler. Pump repairs are reported. Data are given describing the overall system performance, energy savings, and solar energy utilization and availability. Performance data for the collector, storage and Domestic Hot Water (DHW) subsystems are given, as are the system operating energy and site weather conditions. Performance evaluation techniques and sensor technology are discussed briefly. (LEW)

Whitehead, C.Y.

1981-01-01T23:59:59.000Z

266

Baker Construction, Cincinnati, Ohio. Solar energy system performance evaluation, October 1980-May 1981  

DOE Green Energy (OSTI)

The Baker Construction site is a single family residence in Ohio with a passive solar heating system, which consists of 302 square feet of 62 degree sloped greenhouse glazing, a 35,500-pound concrete mass wall, 10,400-pound concrete slab floor, 20 phase change storage rods, six 1-kW electric baseboard heaters, and a wood stove. A solar fraction of 55% is reported. Also the solar savings ratio and conventional fuel savings are given. The performance of the greenhouse collector subsystem, the heat storage subsystem, and the space heating subsystem are summarized as well as total system performance. Energy savings and weather data are also included. The design of the system, performance evaluation techniques, and sensor technology are also presented. (LEW)

Spears, J.W.

1981-01-01T23:59:59.000Z

267

Should we have a new engine. An automobile power systems evaluation. Volume II. Technical reports  

SciTech Connect

Alternative automotive powerplants were examined for possible introduction during the 1980 to 1990 time period. Technical analyses were made of the stratified-charge Otto, diesel, Rankine (steam), Brayton (gas turbine), Stirling, electric, and hybrid powerplants as alternatives to the conventional Otto-cycle engine with its likely improvements. These alternatives were evaluated from a societal point of view in terms of energy consumption, urban air quality, cost to the consumer, materials availability, safety, and industry impact. The results show that goals for emission reduction and energy conservation for the automobile over the next 5 to 10 years can be met by improvements to the Otto-cycle engine and to the vehicle. This provides time for the necessary development work on the Brayton and Stirling engines, which offer the promise of eliminating the automobile as a significant source of urban air pollution, dramatically reducing fuel consumption, and being saleable at a price differential which can be recovered in fuel savings by the first owner. Specifically, the Brayton and Stirling engines require intensive component, system, and manufacturing process development at a funding level considerably higher than at present.

Stephenson, R.R.

1975-01-01T23:59:59.000Z

268

Economic evaluation of the Annual Cycle Energy System (ACES). Volume II. Detailed results. Final report  

Science Conference Proceedings (OSTI)

The energy effectiveness and the economic viability of the ACES concept are examined. ACES is studied in a variety of different applications and compared to a number of conventional systems. The different applications are studied in two groups: the class of building into which the ACES is incorporated and the climatic region in which the ACES is located. Buildings investigated include single-family and multi-family residences and a commercial office building. The application of ACES to each of these building types is studied in Minneapolis, Atlanta, and Philadelphia. The economic evaluation of the ACES is based on a comparison of the present worth of the ACES to the present worth of conventional systems; namely, electric resistance heating, electric air conditioning, and electric domestic water heating; air-to-air heat pump and electric domestic water heating; oil-fired furnace, electric air conditioning, and electric domestic water heating; and gas-fired furnace, electric air conditioning, and gas domestic water heating.

Not Available

1980-05-01T23:59:59.000Z

269

Washington Phase II Fish Diversion Screen Evaluations in the Yakima River Basin, 2004-2005 Annual Report.  

DOE Green Energy (OSTI)

In 2004, the Pacific Northwest National Laboratory (PNNL) evaluated 25 Phase II fish screen sites in the Yakima River Basin as part of a multi-year project for the Bonneville Power Administration on the effectiveness of fish screening devices. PNNL collected data to determine whether velocities in front of the screens and in the bypasses met the National Oceanic and Atmospheric Administration Fisheries (NOAA Fisheries, formerly the National Marine Fisheries Service (NMFS)) criteria to promote safe and timely fish passage. In addition, PNNL conducted underwater video surveys to evaluate the environmental and operational conditions of the screen sites with respect to fish passage. Based on evaluations in 2004, PNNL concluded that: (1) In general, water velocity conditions at the screen sites met fish passage criteria set by NOAA Fisheries. (2) Conditions at most facilities would be expected to provide for safe juvenile fish passage. (3) Automated cleaning brushes generally functioned properly; chains and other moving parts were typically well-greased and operative. (4) Removal of sediment buildup and accumulated leafy and woody debris could be improved at some sites. (5) Conditions at some facilities indicate that operation and/or maintenance should be modified to improve passage conditions for juvenile fish. For example, Taylor has had problems meeting bypass flow and submergence operating criteria since the main river channel shifted away from the site 2 years ago, and Fruitvale consistently has had problems meeting bypass flow criteria when the water is low. (6) Continued problems at Gleed point to design flaws. This site should be considered for redesign or replacement.

Vucelick, Jessica; McMichael, Geoffrey; Chamness, Mickie [Pacific Northwest National Laboratory

2006-02-01T23:59:59.000Z

270

A methodology for performance and compatibility evaluation of an all-digital substation protection system  

E-Print Network (OSTI)

A power system protection system consists, at least, of an instrument trans- former, a protective device (relay), and a circuit breaker. Conventional instrument transformers bring currents and voltages from power network levels to much lower scaled-down replicas that serve as input signals to protective relays. The relay's function is to measure input signals (or a relationship among them in some cases) and compare them to defined operating characteristic thresholds (relay settings) to quickly decide whether to operate associated circuit breaker(s). Existing protection systems within a substation are based on a hardwired interface between instrument transformers and protective relays. Recent development of electronic instrument transformers and the spread of digital relays allow the development of an all-digital protection system, in which the traditional analog interface has been replaced with a digital signal connected to digital relays through a digital communication link (process bus). Due to their design, conventional instrument transformers introduce distortions to the current and voltage signal replicas. These distortions may cause protective relays to misoperate. On the other hand, non-conventional instrument transformers promise distortion-free replicas, which, in turn, should translate into better relay performance. Replacing hardwired signals with a communication bus also reduces the significant cost associated with copper wiring. An all-digital system should provide compatibility and interoperability so that different electronic instrument transformers can be connected to different digital relays (under a multi-vendor connection) Since the novel all-digital system has never been implemented and/or tested in practice so far, its superior performance needs to be evaluated. This thesis proposes a methodology for performance and compatibility evaluation of an all-digital protection system through application testing. The approach defines the performance indices and compatibility indices as well as the evaluation methodology.

Portillo Urdaneta, Levi

2006-12-01T23:59:59.000Z

271

A Field-Coherence Technique for Meteorological Field-Program Design for Air Quality Studies. Part II: Evaluation in the San Joaquin Valley  

Science Conference Proceedings (OSTI)

In Part I of this paper, a field-coherence technique (FCT) was developed to provide objective guidance for cost-effective siting of meteorological observations on the mesoscale for air quality applications. The FCT is evaluated here in Part II ...

Saffet Tanrikulu; David R. Stauffer; Nelson L. Seaman; Andrew J. Ranzieri

2000-03-01T23:59:59.000Z

272

An Experimental Evaluation of HVAC-Grade Carbon-Dioxide Sensors: Part 2, Performance Test Results  

Science Conference Proceedings (OSTI)

This is the second paper in a four-part series reporting on the test and evaluation of typical carbon-dioxide sensors used in building HVAC applications. Fifteen models of NDIR HVAC-grade CO2 sensors were tested and evaluated to determine the accuracy, linearity, repeatability, and hysteresis of each sensor. This paper describes the performance of the sensors and provides a comparison with the manufacturers specifications. The sensors were tested at 40% relative humidity, 73oF (22.8oC) temperature, 14.70 psia (101.35 kPa) pressure, and at five different CO2 concentrations (400 ppm, 750 ppm, 1100 ppm, 1450 ppm, and 1800 ppm). The test results showed a wide variation in sensor performance among the various manufacturers and in some cases a wide variation among sensors of the same model. In all, 45 sensors were evaluated: three from each of the 15 models. Among the 15 models tested, eight models have a single-lamp, single-wavelength configuration, four models have a dual-lamp, single-wavelength configuration, and three models have a single-lamp, dual-wavelength configuration.

Shrestha, Som S [ORNL; Maxwell, Dr. Gregory [Iowa State University

2010-01-01T23:59:59.000Z

273

Solar-energy-system performance evaluation, Cathedral Square, Burlington, Vermont, July-December 1981  

DOE Green Energy (OSTI)

The Cathedral Square solar site is a 10-story multiunit apartment building in Vermont. Its active solar energy system is designed to supply 51% of the hot water load, and consists of 1798 square feet of flat plate collectors, 2699-gallon water tank in an enclosed mechanical room on the roof, and two auxiliary natural gas boilers to supply hot water to immersed heat exchanger in an auxiliary storage tank. The measured solar fraction was only 28%, not 51%, which, it is concluded, is an unreasonable expectation. Other performance data include the solar savings ratio, conventional fuel savings, system performance factor, and solar system coefficient of performance. Monthly performance data are given for the solar system overall, and for the collector, storage, and hot water subsystems. Also included are insolation data, typical storage fluid temperatures, domestic hot water consumption, and solar heat exchangers inlet/outlet temperatures, and typical domestic hot water subsystem temperatures. In addition, the system operating sequence and solar energy utilization are given. Appended are a system description, performance evaluation techniques, long-term weather data. (LEW)

Welch, K.M.

1981-01-01T23:59:59.000Z

274

Evaluating Equipment Performance Using SCADA/PMS Data for Thermal Utility Plants - Case Studies  

E-Print Network (OSTI)

The equipment in cogeneration plants and thermal energy plants such as gas tubing generators, boilers, steam turbine generators, chillers and cooling towers are often critical to satisfying building needs. Their actual energy performance is very important when implementing the continuous Commissioning (CC) process. The actual performance can be used to develop optimal operation strategies, to conduct thermo-economy analysis, to perform fault diagnostics, and so forth. Because the standard performance test such as chiller test per ARI standard and cooling tower test per CTI standard often require the equipment to be operated under specific test conditions; however, in reality the dynamics of the system load normally do not allow the equipment to be operated under such conditions. It is costly and even impossible to take such critical equipment offline for test purposes. In order to facilitate the plant processes and on-going operations, utility plants usually employ Supervisory Control and Data Acquisition Plant Monitoring Systems (SCADA/PMS) or Energy Management and Control Systems (EMCS) to monitor sensors, display data, control equipment, activate alarms and log information. However, the utilization and interpretation of the logged data are often at the minimum level especially in old systems without automatic operation and control optimization capabilities. Through three case studies, this paper presents methods for evaluating equipment performance using SCADA/PMS or EMSC data.

Deng, X.; Chen, Q.; Xu, C.

2007-01-01T23:59:59.000Z

275

Performance Evaluation and Optimization of Diesel Fuel Properties and Chemistry in an HCCI Engine  

DOE Green Energy (OSTI)

The nine CRC fuels for advanced combustion engines (FACE fuels) have been evaluated in a simple, premixed HCCI engine under varying conditions of fuel rate, air-fuel ratio, and intake temperature. Engine performance was found to vary mainly as a function of combustion phasing as affected by fuel cetane and engine control variables. The data was modeled using statistical techniques involving eigenvector representation of the fuel properties and engine control variables, to define engine response and allow optimization across the fuels for best fuel efficiency. In general, the independent manipulation of intake temperature and air-fuel ratio provided some opportunity for improving combustion efficiency of a specific fuel beyond the direct effect of targeting the optimum combustion phasing of the engine (near 5 CAD ATDC). High cetane fuels suffer performance loss due to easier ignition, resulting in lower intake temperatures, which increase HC and CO emissions and result in the need for more advanced combustion phasing. The FACE fuels also varied in T90 temperature and % aromatics, independent of cetane number. T90 temperature was found to have an effect on engine performance when combined with high centane, but % aromatics did not, when evaluated independently of cetane and T90.

Bunting, Bruce G [ORNL; Eaton, Scott J [ORNL; Crawford, Robert W [Rincon Ranch Consulting

2009-01-01T23:59:59.000Z

276

Total system performance assessment - 1995: An evaluation of the potential Yucca Mountain repository  

SciTech Connect

The U.S. Department of Energy (DOE) is currently investigating the feasibility of permanently disposing the nation`s commercial high-level radioactive wastes (in the form of spent fuel from the over 100 electric power-generating nuclear reactors across the U.S.) and a portion of the defense high-level radioactive wastes (currently stored at federal facilities around the country) in the unsaturated tuffaceous rocks at Yucca Mountain, Nevada. Quantitative predictions based on the most current understanding of the processes and parameters potentially affecting the long-term behavior of the disposal system are used to assess the ability of the site and its associated engineered designs to meet regulatory objectives of the US NRC and the US EPA. The evaluation of the ability of the overall system to meet the performance objectives specified in the applicable regulatory standards has been termed total system performance assessment (TSPA). Total system performance assessments require the explicit quantification of the relevant processes and process interactions. In addition assessments are useful to help define the most significant processes, the information gaps and uncertainties and therefore the additional information required for more robust and defensible assessment of the overall performance. The aim of any total system performance assessment is to be as complete and reasonably conservative as possible and to assure that the descriptions of the predictive models and parameters are sufficient to ascertain their accuracy. Total system performance assessments evolve with time. Previous iterations of total system performance assessment of the Yucca Mountain site and associated engineered barriers have been conducted in 1991 and 1993.

Atkins, J.E.; Lee, J.H.; Lingineni, S.; Mishra, S; McNeish, J.A.; Sassani, D.C.; Sevougian, S.D.

1995-11-01T23:59:59.000Z

277

Performance-based approach to evaluate alkali-silica reaction potential of aggregate and concrete using dilatometer method  

E-Print Network (OSTI)

The undesirable expansion of concrete because of a reaction between alkalis and certain type of reactive siliceous aggregates, known as alkali-silica reactivity (ASR), continues to be a major problem across the entire world. The renewed interest to minimize distress resulting from ASR has emphasized the need to develop predictable modeling of concrete ASR behavior under field conditions. Current test methods are either incapable or need long testing periods in which to only offer rather limited predictive estimates of ASR behavior in a narrow and impractical band of field conditions. Therefore, an attempt has been made to formulate a robust performance approach based upon basic properties of aggregate and concrete ASR materials derived from dilatometry and a kinetic-based mathematical expressions for ASR behavior. Because ASR is largely an alkali as well as a thermally activated process, the use of rate theory (an Arrhenius relationship between temperature and the alkali solution concentration) on the dilatometer time-expansion relationship, provides a fundamental aggregate ASR material property known as “activation energy.” Activation energy is an indicator of aggregate reactivity which is a function of alkalinity, particle size, crystallinity, calcium concentration, and others. The studied concrete ASR material properties represent a combined effects of mixture related properties (e.g., water-cementitious ratio, porosity, presence of supplementary cementitious materials, etc.) and maturity. Therefore, the proposed performance-based approach provides a direct accountability for a variety of factors that affect ASR, such as aggregate reactivity (activation energy), temperature, moisture, calcium concentration, solution alkalinity, and water-cementitious material ratio. Based on the experimental results, the following conclusion can be drawn concerning the performance-based approach to evaluate ASR potential of aggregate and concrete using dilatometer method; (i) the concept of activation energy can be used to represent the reactivity of aggregate subjected to ASR, (ii) the activation energy depends on the reactivity of aggregate and phenomenological alkalinity of test solution, and (iii) The proposed performance-based model provides a means to predict ASR expansion development in concrete.

Shon, Chang Seon

2008-05-01T23:59:59.000Z

278

Evaluation of Blade-Strike Models for Estimating the Biological Performance of Large Kaplan Hydro Turbines  

DOE Green Energy (OSTI)

BioIndex testing of hydro-turbines is sought as an analog to the hydraulic index testing conducted on hydro-turbines to optimize their power production efficiency. In BioIndex testing the goal is to identify those operations within the range identified by Index testing where the survival of fish passing through the turbine is maximized. BioIndex testing includes the immediate tailrace region as well as the turbine environment between a turbine's intake trashracks and the exit of its draft tube. The US Army Corps of Engineers and the Department of Energy have been evaluating a variety of means, such as numerical and physical turbine models, to investigate the quality of flow through a hydro-turbine and other aspects of the turbine environment that determine its safety for fish. The goal is to use these tools to develop hypotheses identifying turbine operations and predictions of their biological performance that can be tested at prototype scales. Acceptance of hypotheses would be the means for validation of new operating rules for the turbine tested that would be in place when fish were passing through the turbines. The overall goal of this project is to evaluate the performance of numerical blade strike models as a tool to aid development of testable hypotheses for bioIndexing. Evaluation of the performance of numerical blade strike models is accomplished by comparing predictions of fish mortality resulting from strike by turbine runner blades with observations made using live test fish at mainstem Columbia River Dams and with other predictions of blade strike made using observations of beads passing through a 1:25 scale physical turbine model.

Deng, Zhiqun; Carlson, Thomas J.; Ploskey, Gene R.; Richmond, Marshall C.

2005-11-30T23:59:59.000Z

279

Performance Evaluation and CFD Simulation of Multiphase Twin-Screw Pumps  

E-Print Network (OSTI)

Twin-screw pumps are economical alternatives to the conventional multiphase system and are increasingly used in the oil and gas industry due to their versatility in transferring the multiphase mixture with varying Gas Void Fraction (GVF). Present work focuses on the experimental and numerical analysis of twin-screw pumps for different operating conditions. Experimental evaluation aims to understand steady state and transient behavior of twin-screw pumps. Detailed steady state evaluation helped form better understanding of twin-screw pumps under different operating conditions. A comparative study of twin-screw pumps and compressors contradicted the common belief that compressor efficiency is better than the efficiency of twin-screw pumps. Transient analysis at high GVF helped incorporate necessary changes in the design of sealflush recirculation loop to improve the efficiency of the pump. The effect of viscosity of the sealflush fluid at high GVF on pump performance was studied. Volumetric efficiency was found to be decreased with increase in viscosity. Flow visualization was aimed to characterize phase distribution along cavities and clearances at low to high GVF. Dynamic pressure variation was studied along the axis of the screw which helped correlate the GVF, velocity and pressure distribution. Complicated fluid flow behavior due to enclosed fluid pockets and interconnecting clearances makes it difficult to numerically simulate the pump. Hence design optimization and performance prediction incorporates only analytical approach and experimental evaluation. Current work represents an attempt to numerically simulate a multiphase twin-screw pump as a whole. Single phase 3D CFD simulation was performed for different pressure rise. The pressure and velocity profile agreed well with previous studies. Results are validated using an analytical approach as well as experimental data. A two-phase CFD simulation was performed for 50% GVF. An Eulerian approach was employed to evaluate multiphase flow behavior. Pressure, velocity, temperature and GVF distributions were successfully predicted using CFD simulation. Bubble size was found to be most dominant parameter, significantly affecting phase separation and leakage flow rate. Better phase separation was realized with increased bubble size, which resulted in decrease in leakage flow rate. CFD results agreed well with experimental data for the bubble size higher than 0.08 mm.

Patil, Abhay

2013-08-01T23:59:59.000Z

280

Direct Current Fast Charger System Characterization: Standards, Penetration Potential, Testing, and Performance Evaluation  

Science Conference Proceedings (OSTI)

The importance of direct current (dc) fast charging of plug-in electric vehicles (PEVs) is expected to grow in the near future. This report presents a brief overview of the various standards and protocols in use and in development along with a market assessment of various dc fast chargers and compatible vehicles planned. Modeling and analysis were performed to evaluate the penetration of dc fast chargers based on vehicle driving patterns, region, and charger power. A 200-V, three-phase fast charger was i...

2011-12-14T23:59:59.000Z

Note: This page contains sample records for the topic "ii performance evaluation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Wireless Communication for Controlling Microgrids: Co-simulation and Performance Evaluation  

Science Conference Proceedings (OSTI)

A microgrid with wireless communication links for microgrid control has been designed and developed. The complete simulation model has been developed in MatLab SimuLink with seamless integration of the power subsystem and the communication subsystem. Unlike the conventional co-simulators that usually glue two existing simulators together by creating an interface, which has a steep learning curve, the proposed simulator is a compact single-unit model. Detailed modeling of the power subsystem and communication system is presented as well as the microgrid control architecture and strategies. The impact of different communication system performances on microgrid control has been studied and evaluated in the proposed simulator.

Mao, Rukun [ORNL; Xu, Yan [ORNL; Li, Huijuan [ORNL; Li, Husheng [ORNL

2013-01-01T23:59:59.000Z

282

DOE passive-solar Class A performance-evaluation program: preliminary results  

DOE Green Energy (OSTI)

The major objective of the DOE Passive Solar Class A Performance Evaluation Program is to collect, analyze, and archive detailed test data for the rigorous validation of analysis/design tools used for passive solar research and design. Elements of the plan for Class A validation are described. A proposed validation methodology, including both analytical and empirical tests, a quantitative definition of validation, minimum data requirements, and a standard reporting format, is outlined. The preliminary testing of this methodology using hourly data from two Class A test facilities is presented. Finally, the collection, analysis, and documentation of preliminary data sets is discussed.

Hunn, B.D.; Turk, W.V.; Wray, W.O.

1982-01-01T23:59:59.000Z

283

Performance and degradation evaluation of five different commercial lithium-ion cells  

DOE Green Energy (OSTI)

The initial performance of five different types of Li-ion rechargeable batteries, from Quallion Corp, UltraLife Battery and Toshiba, was measured and compared. Cell characterization included variable-rate constant-current cycling, various USDOE pulse-test protocols and full-spectrum electrochemical impedance spectroscopy. Changes in impedance and capacity were monitored during electrochemical cycling under various conditions, including constant-current cycling over 100 percent DOD at a range of temperature and pulse profile cycling over a very narrow range of DOD at room temperature. All cells were found to maintain more than 80 percent of their rated capacity for more than 400 constant current 100 percent DOD cycles. The power fade (or impedance rise) of the cells varied considerably. New methods for interpreting the pulse resistance data were evaluated for their usefulness in interpreting performance mechanism as a function of test protocol and cell design.

Striebel, Kathryn A.; Shim, Joongpyo

2004-04-20T23:59:59.000Z

284

Performance Evaluation and Quality Assurance Management during the Series Power Tests of LHC Main Lattice Magnets  

E-Print Network (OSTI)

Within the LHC magnet program a series production of superconducting dipoles and quadrupoles has recently been completed in industry and all magnets were cold tested at CERN. The main features of these magnets are: two-in-one structure, 56 mm aperture, two layer coils wound from 15.1 mm wide Nb-Ti cables, and all-polyimide insulation. This paper reviews the process of the power test quality assurance and performance evaluation, which was applied during the LHC magnet series tests. The main test results of magnets tested in both supercritical and superfluid helium, including the quench training, the conductor performance, the magnet protection efficiency and the electrical integrity are presented and discussed in terms of the design parameters and the requirements of the LHC project.

Siemko, A

2008-01-01T23:59:59.000Z

285

Performance evaluation of scheduling in IEEE 802.16 based wireless mesh networks  

E-Print Network (OSTI)

Abstract-We propose an efficient centralized scheduling algorithm in IEEE 802.16 based Wireless Mesh Networks (WMN) to provide high qualified wireless multimedia services. Our algorithm takes special attention on the relay function of the mesh nodes in a transmission tree which is seldom studied in previous research. Some important design metrics, such as fairness, channel utilization and transmission delay are considered in this scheduling algorithm. IEEE 802.16 employs TDMA and the selection policy for scheduled links in a time slot will definitely impact the system performance. We evaluated the proposed algorithm with four selection criteria through extensive simulations and the results are instrumental for improving the performance of IEEE 802.16 based WMNs in terms of link scheduling. I.

Bo Han; Fung Po Tso; Lidong Lin; Weijia Jia

2007-01-01T23:59:59.000Z

286

Analysis of validation data sets in the Class A Performance Evaluation Program  

DOE Green Energy (OSTI)

The primary objective of the DOE Passive Solar Class A Performance Evaluation Program is to collect, analyze, and archive detailed test data for the rigorous validation of analysis/design tools used for passive solar research and design. This paper presents results of the analysis and qualification of several one- and two-week data sets taken at three Class A test sites for the purpose of validating envelope and thermal-storage-energy-transfer processes in passive solar analysis/design tools. Analysis of the data sets consists of editing the measured data and comparing these data with simulated performance results using public-domain, passive solar analysis tools and a standard reporting format developed for the Class A program. Comparisons of the measured data with results using the DOE-2 computer program are presented.

Hunn, B.D.

1983-01-01T23:59:59.000Z

287

STATISTICAL EVALUATION OF SMALL SCALE MIXING DEMONSTRATION SAMPLING AND BATCH TRANSFER PERFORMANCE - 12093  

SciTech Connect

The ability to effectively mix, sample, certify, and deliver consistent batches of High Level Waste (HLW) feed from the Hanford Double Shell Tanks (DST) to the Waste Treatment and Immobilization Plant (WTP) presents a significant mission risk with potential to impact mission length and the quantity of HLW glass produced. DOE's Tank Operations Contractor, Washington River Protection Solutions (WRPS) has previously presented the results of mixing performance in two different sizes of small scale DSTs to support scale up estimates of full scale DST mixing performance. Currently, sufficient sampling of DSTs is one of the largest programmatic risks that could prevent timely delivery of high level waste to the WTP. WRPS has performed small scale mixing and sampling demonstrations to study the ability to sufficiently sample the tanks. The statistical evaluation of the demonstration results which lead to the conclusion that the two scales of small DST are behaving similarly and that full scale performance is predictable will be presented. This work is essential to reduce the risk of requiring a new dedicated feed sampling facility and will guide future optimization work to ensure the waste feed delivery mission will be accomplished successfully. This paper will focus on the analytical data collected from mixing, sampling, and batch transfer testing from the small scale mixing demonstration tanks and how those data are being interpreted to begin to understand the relationship between samples taken prior to transfer and samples from the subsequent batches transferred. An overview of the types of data collected and examples of typical raw data will be provided. The paper will then discuss the processing and manipulation of the data which is necessary to begin evaluating sampling and batch transfer performance. This discussion will also include the evaluation of the analytical measurement capability with regard to the simulant material used in the demonstration tests. The paper will conclude with a discussion of the analysis results illustrating the relationship between the pre-transfer samples and the batch transfers, which support the recommendation regarding the need for a dedicated feed sampling facility.

GREER DA; THIEN MG

2012-01-12T23:59:59.000Z

288

Testing and performance evaluation of T1000G/RS-14 graphite/polycyanate composite materials  

Science Conference Proceedings (OSTI)

The performance of a graphite fiber/polycyanate matrix composite material system, T1000G/RS-14, was evaluated by performing an extensive mechanical property test program. The test program included both static strength and long-term tests for creep, fatigue, and stress rupture. The system was evaluated at both ambient temperature and elevated temperatures. The specimens were machined from composite cylinders that had a unidirectional layup with all the fibers oriented in the hoop direction. The cylinders were fabricated using the wet-filament winding process. In general, the T1000G/RS-14 system demonstrated adequate static strengths for possible aerospace structural applications. The results from the static tests indicated that very high composite hoop tensile strengths can be achieved with this system at both ambient and elevated temperatures as high as 350{degree}F. However, in the long-term testing for compressive creep and tension-tension fatigue the results indicated a lower elevated temperature was required to minimize the risk of using this material system. Additional testing and analysis activities led to the selection of 275{degree}F as the desired temperature for future performance evaluation. Subsequent testing efforts for determining the resin and composite transverse compressive creep responses at 275{degrees}F indicated that excessive creep strain rates may still be a weakness of this system. In the long-term tests, sufficient data was generated from impregnated strand and composite ring stress-life testing, and composite ring tension-tension fatigue to determine failure probabilities for a given set of design requirements. The statistical analyses of the test data, in terms of determining failure probability curves, will be reported on in a separate report. However, it is expected that this material system will have a very low failure probability for stress rupture based on the collected stress-life data. Material responses that will require further investigation and/or possible performance improvements are fiber- direction tension-tension fatigue, and both resin and transverse composite compressive creep. Improvements in the creep performance or dimensional stability of this material system may ultimately depend on the test and/or process environment.

Starbuck, J.M.

1997-01-01T23:59:59.000Z

289

Total system performance assessment - 1995: An evaluation of the potential Yucca Mountain Repository  

Science Conference Proceedings (OSTI)

The U.S. Department of Energy (DOE) is currently investigating the feasibility of permanently disposing the nation`s commercial high-level radioactive wastes (in the form of spent fuel from the over 100 electric power-generating nuclear reactors across the U.S.) and a portion of the defense high-level radioactive wastes (currently stored at federal facilities around the country) in the unsaturated tuffaceous rocks at Yucca Mountain, Nevada. Quantitative predictions based on the most current understanding of the processes and parameters potentially affecting the long-term behavior of the disposal system are used to assess the ability of the site and its associated engineered designs to meet regulatory objectives set forward by the U.S. Nuclear Regulatory Commission (NRC) and the U.S. Environmental Protection Agency (EPA). The evaluation of the ability of the overall system to meet the performance objectives specified in the applicable regulatory standards has been termed total system performance assessment (TSPA). The aim of any total system performance assessment is to be as complete and reasonably conservative as possible and to assure that the descriptions of the predictive models and parameters are sufficient to ascertain their accuracy. Total system performance assessments evolve with time. As additional site and design information is generated, performance assessment analyses can be revised to become more representative of the expected conditions and remove some of the conservative assumptions necessitated by the incompleteness of site and design data. Previous iterations of total system performance assessment of the Yucca Mountain site and associated engineered barriers have been conducted in 1991 and 1993. These analyses have been documented in Barnard, Eslinger, Wilson and Andrews.

NONE

1995-11-01T23:59:59.000Z

290

Total System Performance Assessment, 1993: An evaluation of the potential Yucca Mountain repository  

SciTech Connect

Total System Performance Assessments are an important component in the evaluation of the suitability of Yucca Mountain, Nevada as a potential site for a mined geologic repository for the permanent disposal of high-level radioactive wastes in the United States. The Total System Performance Assessments are conducted iteratively during site characterization to identify issues which should be addressed by the characterization and design activities as well as providing input to regulatory/licensing and programmatic decisions. During fiscal years 1991 and 1992, the first iteration of Total System Performance Assessment (hereafter referred to as TSPA 1991) was completed by Sandia National Laboratories and Pacific Northwest Laboratory. Beginning in fiscal year 1993, the Civilian Radioactive Waste Management System Management and Operating Contractor was assigned the responsibility to plan, coordinate, and contribute to the second iteration of Total System Performance Assessment (hereafter referred to as TSPA 1993). This document presents the objectives, approach, assumptions, input, results, conclusions, and recommendations associated with the Management and Operating Contractor contribution to TSPA 1993. The new information incorporated in TSPA 1993 includes (1) revised estimates of radionuclide solubilities (and their thermal and geochemical dependency), (2) thermal and geochemical dependency of spent fuel waste alteration and glass dissolution rates, (3) new distribution coefficient (k{sub d}) estimates, (4) revised estimates of gas-phase velocities and travel times, and (5) revised hydrologic modeling of the saturated zone which provides updated estimates of the advective flux through the saturated zone.

Andrews, R.W.; Dale, T.F.; McNeish, J.A.

1994-03-01T23:59:59.000Z

291

Evaluation of a High-Performance Solar Home in Loveland, Colorado: Preprint  

DOE Green Energy (OSTI)

Building America (BA) partner McStain Neighborhoods built the Discovery House in Loveland, Colorado, with an extensive package of energy-efficient features, including a high-performance envelope, efficient mechanical systems, a solar water heater integrated with the space-heating system, a heat-recovery ventilator (HRV), and ENERGY STAR appliances. The National Renewable Energy Laboratory (NREL) and Building Science Consortium (BSC) conducted short-term field-testing and building energy simulations to evaluate the performance of the house. These evaluations are utilized by BA to improve future prototype designs and to identify critical research needs. The Discovery House building envelope and ducts were very tight under normal operating conditions. The HRV provided fresh air at a rate of about 35 l/s (75 cfm), consistent with the recommendations of ASHRAE Standard 62.2. The solar hot water system is expected to meet the bulk of the domestic hot water (DHW) load (>83%), but only about 12% of the space-heating load. DOE-2.2 simulations predict whole-house source energy savings of 54% compared to the BA Benchmark. The largest contributors to energy savings beyond McStain's standard practice are the solar water heater, HRV, improved air distribution, high-efficiency boiler, and compact fluorescent lighting package.

Hendron, R.; Eastment, M.; Hancock, E.; Barker, G.; Reeves, P.

2006-08-01T23:59:59.000Z

292

Evaluation of a High-Performance Solar Home in Loveland, Colorado  

DOE Green Energy (OSTI)

Building America (BA) partner McStain Neighborhoods built the Discovery House in Loveland, Colorado, with an extensive package of energy-efficient features, including a high-performance envelope, efficient mechanical systems, a solar water heater integrated with the space-heating system, a heat-recovery ventilator (HRV), and ENERGY STAR? appliances. The National Renewable Energy Laboratory (NREL) and Building Science Consortium (BSC) conducted short-term field-testing and building energy simulations to evaluate the performance of the house. These evaluations are utilized by BA to improve future prototype designs and to identify critical research needs. The Discovery House building envelope and ducts were very tight under normal operating conditions. The HRV provided fresh air at a rate of about 75 cfm (35 l/s), consistent with the recommendations of ASHRAE Standard 62.2. The solar hot water system is expected to meet the bulk of the domestic hot water (DHW) load (>83%), but only about 12% of the space-heating load. DOE-2.2 simulations predict whole-house source energy savings of 54% compared to the BA Benchmark [1]. The largest contributors to energy savings beyond McStain's standard practice are the solar water heater, HRV, improved air distribution, high-efficiency boiler, and compact fluorescent lighting package.

Hendron, R.; Eastment, M.; Hancock, E.; Barker, G.; Reeves, P.

2006-01-01T23:59:59.000Z

293

Development of new methodologies for evaluating the energy performance of new commercial buildings  

E-Print Network (OSTI)

The concept of Measurement and Verification (M&V) of a new building continues to become more important because efficient design alone is often not sufficient to deliver an efficient building. Simulation models that are calibrated to measured data can be used to evaluate the energy performance of new buildings if they are compared to energy baselines such as similar buildings, energy codes, and design standards. Unfortunately, there is a lack of detailed M&V methods and analysis methods to measure energy savings from new buildings that would have hypothetical energy baselines. Therefore, this study developed and demonstrated several new methodologies for evaluating the energy performance of new commercial buildings using a case-study building in Austin, Texas. First, three new M&V methods were developed to enhance the previous generic M&V framework for new buildings, including: 1) The development of a method to synthesize weathernormalized cooling energy use from a correlation of Motor Control Center (MCC) electricity use when chilled water use is unavailable, 2) The development of an improved method to analyze measured solar transmittance against incidence angle for sample glazing using different solar sensor types, including Eppley PSP and Li-Cor sensors, and 3) The development of an improved method to analyze chiller efficiency and operation at part-load conditions. Second, three new calibration methods were developed and analyzed, including: 1) A new percentile analysis added to the previous signature method for use with a DOE-2 calibration, 2) A new analysis to account for undocumented exhaust air in DOE-2 calibration, and 3) An analysis of the impact of synthesized direct normal solar radiation using the Erbs correlation on DOE-2 simulation. Third, an analysis of the actual energy savings compared to three different energy baselines was performed, including: 1) Energy Use Index (EUI) comparisons with sub-metered data, 2) New comparisons against Standards 90.1-1989 and 90.1-2001, and 3) A new evaluation of the performance of selected Energy Conservation Design Measures (ECDMs). Finally, potential energy savings were also simulated from selected improvements, including: minimum supply air flow, undocumented exhaust air, and daylighting.

Song, Suwon

2006-08-01T23:59:59.000Z

294

Re-Assessing Green Building Performance: A Post Occupancy Evaluation of 22 GSA Buildings  

SciTech Connect

2nd report on the performance of GSA's sustainably designed buildings. The purpose of this study was to provide an overview of measured whole building performance as it compares to GSA and industry baselines. The PNNL research team found the data analysis illuminated strengths and weaknesses of individual buildings as well as the portfolio of buildings. This section includes summary data, observations that cross multiple performance metrics, discussion of lessons learned from this research, and opportunities for future research. The summary of annual data for each of the performance metrics is provided in Table 25. The data represent 1 year of measurements and are not associated with any specific design features or strategies. Where available, multiple years of data were examined and there were minimal significant differences between the years. Individually focused post occupancy evaluation (POEs) would allow for more detailed analysis of the buildings. Examining building performance over multiple years could potentially offer a useful diagnostic tool for identifying building operations that are in need of operational changes. Investigating what the connection is between the building performance and the design intent would offer potential design guidance and possible insight into building operation strategies. The 'aggregate operating cost' metric used in this study represents the costs that were available for developing a comparative industry baseline for office buildings. The costs include water utilities, energy utilities, general maintenance, grounds maintenance, waste and recycling, and janitorial costs. Three of the buildings that cost more than the baseline in Figure 45 have higher maintenance costs than the baseline, and one has higher energy costs. Given the volume of data collected and analyzed for this study, the inevitable request is for a simple answer with respect to sustainably designed building performance. As previously stated, compiling the individual building values into single metrics is not statistically valid given the small number of buildings, but it has been done to provide a cursory view of this portfolio of sustainably designed buildings. For all metrics except recycling cost per rentable square foot and CBE survey response rate, the averaged building performance was better than the baseline for the GSA buildings in this study.

Fowler, Kimberly M.; Rauch, Emily M.; Henderson, Jordan W.; Kora, Angela R.

2010-06-01T23:59:59.000Z

295

Noise Performance Evaluation of the Candidate Digitizers for the MAJORANA DEMONSTRATOR  

Science Conference Proceedings (OSTI)

The noise performance evaluation of the two digitizer cards being considered for the MAJORANA DEMONSTRATOR (MJD) is presented in this document. The procurement of the data acquisition electronics for the MJD is scheduled to happen this year. At the time of writing this document, there are two candidate digitizer electronic boards. One aspect that is being considered by the collaboration is the feasibility of using the MJD for dark matter searches. The feasibility of using the MJD for this application is going to be dictated by the ability of the demonstrator to reach sub-keV energy resolution. One of the potential sources of noise in the MJD is the data acquisition system. This document will is concluded with a recommendation for the final digitizer board by comparing the noise performance of the two electronics systems. Noise parameters such as the effective number of bits, input range linearity and signal to noise ratio are experimentally determined. The two digitizer cards feature different on-board digital signal processing and these features are compared. The experimental set-up was also used to identify sources of noise. This paper describes these sources of noise in the data acquisition system, along with mitigation strategies. Issues such as grounding and wiring scheme have an impact in the overall data acquisition system performance and are discussed in detail. As a conclusion, the suitability of each one of the cards to become the back bone of the data acquisition system of the MJD is discussed.

Aguayo Navarrete, Estanislao

2011-03-16T23:59:59.000Z

296

Reference wind speed distributions and height profiles for wind turbine design and performance evaluation applications. [USA  

DOE Green Energy (OSTI)

The purpose of this report is to provide a set of reference or standard values of wind profiles, wind speed distributions and their effects on wind turbine performance for engineering design applications. Based on measured Weibull distribution parameters, representative average, low, and high variance data are given for height profiles of mean, 25 percentile, and 75 percentile wind speeds; and for wind speed probability density (velocity frequency) functions and cumulative probability (velocity duration) functions at selected heights. Results of a sensitivity analysis of the dependence of wind turbine performance parameters on cut-in speed, and rated speed for various mean wind and wind variance regimes are also presented. Wind turbine performance is expressed in terms of capacity factor (ratio of mean power output to rated power) and recovery factor (ratio of mean energy output to energy theoretically available in the wind). The representative high, mean, and low variance cases were determined from calculated Weibull distributions at 140 sites across the Continental U.S., and all of the representative functions are evaluated at mean wind speeds of 4, 5, 6, 7, and 8 m/s at standard 10 m level.

Justus, C.G.; Hargraves, W.R.; Mikhail, A.

1976-08-01T23:59:59.000Z

297

Test method development for evaluating the freeze-thaw performance of segmental retaining wall blocks  

E-Print Network (OSTI)

Segmental retaining walls (SRW), typically constructed along highways, have grown in popularity over the past decade. Manufacturers of SRW blocks have estimated the service life of a properly constructed wall to be approximately 75 years. However, there have been reports of SRW systems failing after only five years in service. Suspected causes of the SRW failures are freeze-thaw damage while exposed to deicing salts sprayed by snow plows from highways. The current standard test method used for evaluating the freeze-thaw durability of SRW blocks has several drawbacks and does not accurately replicate environmental exposure field conditions. The objective of this research is to develop and assess a new standard test method for evaluating the freeze-thaw durability of SRW blocks that obtains reproducible results and offers sufficient information on the freeze-thaw performance for SRW block manufacturers and state highway agencies (SHAs). The research completed a preliminary proof of concept test for the new freezethaw test method developed using small, commercially available SRW blocks to mitigate potential problems and establish appropriate test parameters. The testing produced results of freeze-thaw degradation that followed the same modes of failure that has been discovered during field evaluations. After the proof of concept test was completed, a series of freeze-thaw tests were conducted using sets of SHA approved and non-SHA approved SRW blocks. Three different manufacturers� SRW blocks were evaluated. There was no significant freezethaw degradation of any of the blocks after 200 freeze-thaw cycles, so for two blocks, experiments were extended to 400 cycles using a twelve-hour freeze-thaw cycle. The modification of the test did not result in more rapid deterioration of the SRW blocks. The researchers found that the freeze-thaw durability test method developed herein is beneficial for determining the freeze-thaw performance of the lower quality specified blocks. The test method gives realistic results, which match typical deterioration modes that are common in field settings, in a timely manner. However, the test method for testing SHA quality SRW blocks takes longer times and may not be a reasonable test for such products.

Hoelscher, Aaron Kindall

2006-12-01T23:59:59.000Z

298

Outdoor test for thermal performance evaluation of the Owens-Illinois Sunpak SEC-601 (air) solar collector  

DOE Green Energy (OSTI)

The test procedures used and the test results obtained during the performance of an evaluation test program on the Owens-Illinois Sunpak, model SEC-601, air solar collector under natural outdoor weather conditions are presented. All testing activities were performed on a single module installed on the Marshall Space Flight Center Solar House. The test was performed and the data evaluated according to the methods provided in ASHRAE 93-77 (Method of Testing to Determine the Thermal Performance of Solar Collectors) as applicable to outdoor testing of solar collectors.

Not Available

1979-12-01T23:59:59.000Z

299

Evaluation of the EIA system performance in Greece, using quality indicators  

SciTech Connect

Greece was among the last countries in the European Union to adopt the EU Directives on Environmental Impact Assessment, upgrading the previously existing legislative framework. The aim of the present paper was to appraise the quality of a randomly selected sample of EISs using non-obligatory but quality-related indicators and to evaluate the overall quality of these studies produced in Greece during the last decade (1993-2003). It was found that the majority of these EISs performed rather poorly in respect of most indicators used and there was little evidence of improvement with time. It is concluded that the authorities in charge still have little experience in coping with the increasing bulk of project submissions and are primarily interested in conformity with formal requirements rather than in reliable predictions and in overall quality of the EIA procedure.

Androulidakis, Ioannis [Laboratory of Maritime Engineering and Maritime Works, Department of Civil Engineering, Aristotle University of Thessaloniki, 54124 (Greece) and Ecology and Biodiversity Laboratory, Department of Environmental Engineering, Technical University of Crete, Polytechnioupolis Chania 73100 (Greece)]. E-mail: iandroul@civil.auth.gr; Karakassis, Ioannis [Ecology and Biodiversity Laboratory, Department of Environmental Engineering, Technical University of Crete, Polytechnioupolis Chania 73100 (Greece); Marine Ecology Laboratory, Department of Biology, University of Crete, P.O. Box 2208, GR-71409, Heraklion, Crete (Greece)

2006-04-15T23:59:59.000Z

300

Indoor test for thermal performance evaluation of the Northrup Concentrating Solar Collector  

DOE Green Energy (OSTI)

The test procedure used and the results obtained from an evaluation test program conducted to obtain thermal performance data on a Northrup concentrating solar collector under simulated conditions are described. These tests were made using the Marshall Space Flight Center's solar simulator. A time constant test and incident angle modifier test were also conducted to determine the transient effect and the incident angle effect on the collector. The Northrup concentrating solar collector is a water/glycol/working fluid type, dipped galvanized steel housing, transparent acrylic Fresnel lens cover, copper absorber tube, fiber glass insulation and weighs approximately 98 pounds. The gross collector area is about 29.4 ft/sup 2/ per collector. A collector assembly includes four collector units within a tracking mount array.

Not Available

1978-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "ii performance evaluation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

A joint computational and experimental study to evaluate Inconel-sheathed thermocouple performance in flames.  

Science Conference Proceedings (OSTI)

A joint experimental and computational study was performed to evaluate the capability of the Sandia Fire Code VULCAN to predict thermocouple response temperature. Thermocouple temperatures recorded by an Inconel-sheathed thermocouple inserted into a near-adiabatic flat flame were predicted by companion VULCAN simulations. The predicted thermocouple temperatures were within 6% of the measured values, with the error primarily attributable to uncertainty in Inconel 600 emissivity and axial conduction losses along the length of the thermocouple assembly. Hence, it is recommended that future thermocouple models (for Inconel-sheathed designs) include a correction for axial conduction. Given the remarkable agreement between experiment and simulation, it is recommended that the analysis be repeated for thermocouples in flames with pollutants such as soot.

Brundage, Aaron L.; Nicolette, Vernon F.; Donaldson, A. Burl; Kearney, Sean Patrick; Gill, Walter

2005-09-01T23:59:59.000Z

302

Alvord (3,000-ft strawn) LPG flood - design and performance evaluation  

SciTech Connect

Mitchell Energy Corporation has implemented a LPG-dry gas miscible process in the Alvord (3000' Strawn) Unit in Wise County, Texas utilizing the DOE tertiary incentive program. The field had been waterflooded for 14 years and was producing near its economic limit at the time this project was started. This paper presents the results of the reservoir simulation study that was conducted to evaluate pattern configuration and operating alternatives so as to maximize LPG containment and oil recovery performance. Several recommendations resulting from this study were implemented for the project. Based on the model predictions, tertiary oil recovery is expected to be between 100,000 and 130,000 bbls, or about 7 percent of the oil originally in place in the Unit. 12 refs.

Frazier, G.D.; Todd, M.R.

1982-01-01T23:59:59.000Z

303

A comparison of photovoltaic module performance evaluation methodologies for energy ratings  

DOE Green Energy (OSTI)

The rating of photovoltaic (PV) modules has always been a controversial topic in the PV community. Currently, there is no industry standard methodology to evaluate PV modules for energy production. This issue must be discussed and resolved for the benefit of system planners, utilities, and other consumers. Several methodologies are available to rate a module`s peak power, but do any accurately predict energy output for flat-plate modules? This paper analyzes the energy performance of PV modules using six different energy calculation techniques and compares the results to the measured amount of energy produced. The results indicate which methods are the most effective for predicting energy output in Golden, Colorado, under prevailing meteorological conditions.

Kroposki, B.; Emery, K.; Myers, D.; Mrig, L.

1995-10-01T23:59:59.000Z

304

Evaluation of IPCC Models’ Performance in Simulating Late-Twentieth-Century Climatologies and Weather Patterns over North America  

Science Conference Proceedings (OSTI)

The authors analyze the performance of 22 Intergovernmental Panel on Climate Change (IPCC) global climate models (GCMs) over all of North America and its western subregion using several different evaluation metrics. They assess the model skill in ...

Valentina Radi?; Garry K. C. Clarke

2011-10-01T23:59:59.000Z

305

Evaluation and Performance Enhancement of a Pressure Transducer under Flows, Waves, and a Combination of Flows and Waves  

Science Conference Proceedings (OSTI)

The performance of a pressure transducer, with its inlet attached to differing hydromechanical front ends, has been evaluated in flow flume and wave flume experiments in which laminar and turbulent flows, and regular progressive gravity waves and ...

Antony Joseph; J. A. Erwin Desa; Peter Foden; Kevin Taylor; Jim McKeown; Ehrlich Desa

2000-03-01T23:59:59.000Z

306

Performance Evaluation for a Lightning Location System Based on Observations of Artificially Triggered Lightning and Natural Lightning Flashes  

Science Conference Proceedings (OSTI)

Performance evaluation for the lightning location system (LLS) of the power grid in Guangdong Province, China, was conducted based on observation data of the triggered lightning flashes obtained in Conghua, Guangzhou, during 2007–11 and natural ...

Luwen Chen; Yijun Zhang; Weitao Lu; Dong Zheng; Yang Zhang; Shaodong Chen; Zhihui Huang

2012-12-01T23:59:59.000Z

307

Improvement of the NCEP Global Model over the Tropics: An Evaluation of Model Performance during the 1995 Hurricane Season  

Science Conference Proceedings (OSTI)

An evaluation of the performance of the National Centers for Environmental Prediction Medium-Range Forecast Model was made for the large-scale tropical forecasts and hurricane track forecasts during the 1995 hurricane season. The assessment of ...

Naomi Surgi; Hua-Lu Pan; Stephen J. Lord

1998-05-01T23:59:59.000Z

308

Performance Evaluation of HYCOM-GOM for Hydrokinetic Resource Assessment in the Florida Strait  

SciTech Connect

The U.S. Department of Energy (DoE) is assessing and mapping the potential off-shore ocean current hydrokinetic energy resources along the U.S. coastline, excluding tidal currents, to facilitate market penetration of water power technologies. This resource assessment includes information on the temporal and three-dimensional spatial distribution of the daily averaged power density, and the overall theoretical hydrokinetic energy production, based on modeled historical simulations spanning a 7-year period of record using HYCOM-GOM, an ocean current observation assimilation model that generates a spatially distributed three-dimensional representation of daily averaged horizontal current magnitude and direction time series from which power density time series and their statistics can be derived. This study ascertains the deviation of HYCOM-GOM outputs, including transport (flow) and power density, from outputs based on three independent observation sources to evaluate HYCOM-GOM performance. The three independent data sources include NOAA s submarine cable data of transport, ADCP data at a high power density location, and HF radar data in the high power density region of the Florida Strait. Comparisons with these three independent observation sets indicate discrepancies with HYCOM model outputs, but overall indicate that the HYCOM-GOM model can provide an adequate assessment of the ocean current hydrokinetic resource in high power density regions like the Florida Strait. Additional independent observational data, in particular stationary ADCP measurements, would be useful for expanding this model performance evaluation study. ADCP measurements are rare in ocean environments not influenced by tides, and limited to one location in the Florida Strait. HF radar data, although providing great spatial coverage, is limited to surface currents only.

Neary, Vincent S [ORNL; Gunawan, Budi [ORNL; Ryou, Albert S [ORNL

2012-06-01T23:59:59.000Z

309

Thermal Performance Evaluation of Attic Radiant Barrier Systems Using the Large Scale Climate Simulator (LSCS)  

SciTech Connect

Application of radiant barriers and low-emittance surface coatings in residential building attics can significantly reduce conditioning loads from heat flow through attic floors. The roofing industry has been developing and using various radiant barrier systems and low-emittance surface coatings to increase energy efficiency in buildings; however, minimal data are available that quantifies the effectiveness of these technologies. This study evaluates performance of various attic radiant barrier systems under simulated summer daytime conditions and nighttime or low solar gain daytime winter conditions using the large scale climate simulator (LSCS). The four attic configurations that were evaluated are 1) no radiant barrier (control), 2) perforated low-e foil laminated oriented strand board (OSB) deck, 3) low-e foil stapled on rafters, and 4) liquid applied low-emittance coating on roof deck and rafters. All test attics used nominal RUS 13 h-ft2- F/Btu (RSI 2.29 m2-K/W) fiberglass batt insulation on attic floor. Results indicate that the three systems with radiant barriers had heat flows through the attic floor during summer daytime condition that were 33%, 50%, and 19% lower than the control, respectively.

Shrestha, Som S [ORNL] [ORNL; Miller, William A [ORNL] [ORNL; Desjarlais, Andre Omer [ORNL] [ORNL

2013-01-01T23:59:59.000Z

310

5.1 FACULTY EVALUATION PROCEDURE SUMMARY For complete information on Performance Evaluations, see Section 7 of the Faculty Handbook.  

E-Print Network (OSTI)

Section 7 of the Faculty Handbook. Annual evaluation of the faculty of the Colorado School of Mines should in Section 4 of the CSM Faculty Handbook. The Faculty Data Report template is available online at http to the Academic Affairs Office each Spring. According to the Faculty Handbook, "For the evaluative analysis

311

Steady-State Thermal Performance Evaluation of Steel-Framed Wall Assembly with Local Foam Insulation  

DOE Green Energy (OSTI)

During January and May, 2009, two configurations of steel-framed walls constructed with conventional 2 4 steel studs insulated with R-19 ~14cm. (5.5-in. thick) and R-13 ~9cm. (3.5-in. thick) fiberglass insulation batts were tested in the Oak Ridge National Laboratory (ORNL) guarded hot-box using ASTM C1363 test procedure. The first test wall used conventional 2 4 steel studs insulated with 2.5-cm. (1-in.) thick foam profiles, called stud snugglers. These stud snugglers converted the 2 4 wall assembly into a 2 6 assembly allowing application of R-19 fiberglass insulation. The second wall tested for comparison was a conventional 2 4 steel stud wall using R-13 insulation batts. Further, numerical simulations were performed in order to evaluate the steady-state thermal performance of various wood- and steel-framed wall assemblies. The effects of adding the stud-snugglers to the wood and steel studs were also investigated numerically. Different combinations of insulation and framing factor were used in the simulations.

Kosny, Jan [ORNL; Biswas, Kaushik [ORNL; Childs, Phillip W [ORNL

2010-01-01T23:59:59.000Z

312

SCALE: A modular code system for performing standardized computer analyses for licensing evaluation  

Science Conference Proceedings (OSTI)

This Manual represents Revision 5 of the user documentation for the modular code system referred to as SCALE. The history of the SCALE code system dates back to 1969 when the current Computational Physics and Engineering Division at Oak Ridge National Laboratory (ORNL) began providing the transportation package certification staff at the U.S. Atomic Energy Commission with computational support in the use of the new KENO code for performing criticality safety assessments with the statistical Monte Carlo method. From 1969 to 1976 the certification staff relied on the ORNL staff to assist them in the correct use of codes and data for criticality, shielding, and heat transfer analyses of transportation packages. However, the certification staff learned that, with only occasional use of the codes, it was difficult to become proficient in performing the calculations often needed for an independent safety review. Thus, shortly after the move of the certification staff to the U.S. Nuclear Regulatory Commission (NRC), the NRC staff proposed the development of an easy-to-use analysis system that provided the technical capabilities of the individual modules with which they were familiar. With this proposal, the concept of the Standardized Computer Analyses for Licensing Evaluation (SCALE) code system was born. This manual covers an array of modules written for the SCALE package, consisting of drivers, system libraries, cross section and materials properties libraries, input/output routines, storage modules, and help files.

NONE

1997-03-01T23:59:59.000Z

313

Application of solar energy to industrial drying of soybeans: Phase III, performance evaluation. Final report  

DOE Green Energy (OSTI)

A 15-month performance evaluation was conducted on a solar system designed and constructed to augment the industrial drying of soybeans at the Gold Kist, Inc., extraction plant in Decatur, Alabama. The plant employs three oil-fired, continuous-flow dryers of 3,000 bu/hr each. The solar system consists of 672 Solaron air collectors that temper the airflow into the existing dryers. Since the requirement for energy exceeds the peak solar system capacity, no storage is provided. The interface with the existing facility is simply accomplished by three ducts that release the solar heated air directly adjacent to the dryer air intakes, and no mechanical coupling is needed. The solar system was operated for 1,752 hr on 290 days during the 15-month period without a single failure sufficient to cause shutdown. No interference with normal plant operations was experienced. Maintenance of the solar system, consisting of service to the air handling unit, cleaning of collector glazing, and minor duct repair, totaled $1,564. System utilization was only 46.3%. This was primarily due to daytime routine maintenance performed on the conventional drying and processing equipment. The solar fraction was not large enough to justify maintenance shift changes. An average collector efficiency of 26.2% was experienced. Contamination caused by the local plant environment reduced the average collector efficiency by 9.3 percentage points. A prototype of an automatic cleaning system was constructed and tested.

Hall, B.R.

1979-10-31T23:59:59.000Z

314

EXPERIMENTAL EVALUATION OF THE THERMAL PERFORMANCE OF A WATER SHIELD FOR A SURFACE POWER REACTOR  

SciTech Connect

Water based reactor shielding is being investigated for use on initial lunar surface power systems. A water shield may lower overall cost (as compared to development cost for other materials) and simplify operations in the setup and handling. The thermal hydraulic performance of the shield is of significant interest. The mechanism for transferring heat through the shield is natural convection. Natural convection in a 100 kWt lunar surface reactor shield design is evaluated with 2 kW power input to the water in the Water Shield Testbed (WST) at the NASA Marshall Space Flight Center. The experimental data from the WST is used to validate a CFD model. Performance of the water shield on the lunar surface is then predicted with a CFD model anchored to test data. The experiment had a maximum water temperature of 75 C. The CFD model with 1/6-g predicts a maximum water temperature of 88 C with the same heat load and external boundary conditions. This difference in maximum temperature does not greatly affect the structural design of the shield, and demonstrates that it may be possible to use water for a lunar reactor shield.

REID, ROBERT S. [Los Alamos National Laboratory; PEARSON, J. BOSIE [Los Alamos National Laboratory; STEWART, ERIC T. [Los Alamos National Laboratory

2007-01-16T23:59:59.000Z

315

Experimental Evaluation of the Thermal Performance of a Water Shield for a Surface Power Reactor  

SciTech Connect

Water based reactor shielding is being investigated for use on initial lunar surface power systems. A water shield may lower overall cost (as compared to development cost for other materials) and simplify operations in the setup and handling. The thermal hydraulic performance of the shield is of significant interest. The mechanism for transferring heat through the shield is natural convection. Natural convection in a 100 kWt lunar surface reactor shield design is evaluated with 2 kW power input to the water in the Water Shield Testbed (WST) at the NASA Marshall Space Flight Center. The experimental data from the WST is used to validate a CFD model. Performance of the water shield on the lunar surface is then predicted with a CFD model anchored to test data. The experiment had a maximum water temperature of 75 deg. C. The CFD model with 1/6-g predicts a maximum water temperature of 88 deg. C with the same heat load and external boundary conditions. This difference in maximum temperature does not greatly affect the structural design of the shield, and demonstrates that it may be possible to use water for a lunar reactor shield.

Pearson, J. Boise; Stewart, Eric T. [NASA Marshall Space Flight Center, Huntsville, AL 35812 (United States); Reid, Robert S. [Los Alamos National Laboratory, Los Alamos, NM 87544 (United States)

2007-01-30T23:59:59.000Z

316

Performance evaluation of passive cooling in office buildings based on uncertainty and sensitivity analysis  

Science Conference Proceedings (OSTI)

Natural night ventilation is an interesting passive cooling method in moderate climates. Driven by wind and stack generated pressures, it cools down the exposed building structure at night, in which the heat of the previous day is accumulated. The performance of natural night ventilation highly depends on the external weather conditions and especially on the outdoor temperature. An increase of this outdoor temperature is noticed over the last century and the IPCC predicts an additional rise to the end of this century. A methodology is needed to evaluate the reliable operation of the indoor climate of buildings in case of warmer and uncertain summer conditions. The uncertainty on the climate and on other design data can be very important in the decision process of a building project. The aim of this research is to develop a methodology to predict the performance of natural night ventilation using building energy simulation taking into account the uncertainties in the input. The performance evaluation of natural night ventilation is based on uncertainty and sensitivity analysis. The results of the uncertainty analysis showed that thermal comfort in a single office cooled with single-sided night ventilation had the largest uncertainty. The uncertainties on thermal comfort in case of passive stack and cross ventilation were substantially smaller. However, since wind, as the main driving force for cross ventilation, is highly variable, the cross ventilation strategy required larger louvre areas than the stack ventilation strategy to achieve a similar performance. The differences in uncertainty between the orientations were small. Sensitivity analysis was used to determine the most dominant set of input parameters causing the uncertainty on thermal comfort. The internal heat gains, solar heat gain coefficient of the sunblinds, internal convective heat transfer coefficient, thermophysical properties related to thermal mass, set-point temperatures controlling the natural night ventilation, the discharge coefficient C{sub d} of the night ventilation opening and the wind pressure coefficients C{sub p} were identified to have the largest impact on the uncertainty of thermal comfort. The impact of the warming climate on the uncertainty of thermal comfort was determined. The uncertainty on thermal comfort appeared to increase significantly when a weather data set with recurrence time of 10 years (warm weather) was applied in the transient simulations in stead of a standard weather data set. Natural night ventilation, designed for normal weather conditions, was clearly not able to ensure a high probability of good thermal comfort in warm weather. To ensure a high probability of good thermal comfort and to reduce the performance uncertainty in a warming climate, natural night ventilation has to be combined with additional measures. Different measures were analysed, based on the results of the sensitivity analysis. All the measures were shown to significantly decrease the uncertainty of thermal comfort in warm weather. The study showed the importance to carry out simulations with a warm weather data set together with the analysis under typical conditions. This approach allows to gain a better understanding of the performance of a natural night ventilation design, and to optimize the design to a robust solution. (author)

Breesch, H. [Building Physics, Construction and Services, Department of Architecture and Urban Planning, Ghent University, J. Plateaustraat 22, B-9000 Ghent (Belgium); Sustainable Building Research Group, Department of Construction, Catholic University College Ghent, Gebroeders Desmetstraat 1, B-9000 Ghent (Belgium); Janssens, A. [Building Physics, Construction and Services, Department of Architecture and Urban Planning, Ghent University, J. Plateaustraat 22, B-9000 Ghent (Belgium)

2010-08-15T23:59:59.000Z

317

Development of New Methodologies for Evaluating the Energy Performance of New Commercial Buildings  

E-Print Network (OSTI)

During the past decade, utility companies and others have offered new construction programs to promote energy savings based on energy-efficient design, which maximize design flexibility as well as energy savings. For such programs, the concept of Measurement and Verification (M&V) of a new building continues to become more important because efficient design alone is often not sufficient to deliver an efficient building. Simulation models that are calibrated to measured data can be used to evaluate the energy performance of new buildings if it is compared to energy baselines such as similar buildings, energy codes, and design standards (IPMVP 2003; Torcellini et. 2004). Unfortunately, there is a lack of detailed M&V methods and analysis methods to measure energy savings from new buildings that would have hypothetical energy baselines. In addition, many important questions remain, for example: how to simulate and calibrate a simulation with measured data, how to develop energy baselines for comparison to the new building, and how to calculate energy savings compared to energy baselines. Therefore, this study developed and demonstrated several methodologies for evaluating the energy performance of new commercial buildings using a case-study building in Austin, Texas, in terms of: 1) Whole-building energy metering with in-situ measurements, 2) Simulation and calibration methods applicable to new buildings, and 3) Building energy baselines and savings assessments. Consequently, three new M&V methods were developed in this study to enhance the generic M&V framework (IPMVP 2003) for new buildings, including: 1) The development of a procedure to synthesize weather-normalized cooling energy use (i.e., Btu cooling production) from a correlation of MCC electricity use when chilled water use is unavailable, 2) The development of an improved method to analyze measured solar transmittance against incidence angle for sample glazing using different solar sensor types, including an Eppley PSP and Li-Cor sensor, and 3) The development of an improved method to analyze chiller efficiency and operation at part-load conditions. Second, three new methods were also developed and analyzed in the process of the as-built model simulation and calibration, including: 1) A new percentile analysis to the previous signature method (Wei et al. 1998) for use with a DOE-2 calibration, 2) A new analysis to account for undocumented exhaust air in DOE-2 calibration, and 3) An analysis of the impact of synthesized direct normal solar radiation using the Erbs correlation (Duffie and Beckman 1991) on DOE-2 simulation. Third, an analysis of the actual energy savings compared to three different energy baselines was performed, including: 1) Energy Use Index (EUI) comparisons with sub-metered data, 2) New comparisons against Standards 90.1-1989 and 90.1-2001, and 3) A new evaluation of the performance of selected ECDMs. Finally, potential energy savings were also simulated from selected improvements, including minimum supply air flow, undocumented exhaust air, and daylighting. As a result, the calibrated models were determined to have an overall 20.38% CV(RMSE) and a 0.63% MBE for the 2001 model and an overall 23.82% CV(RMSE) and a 0.61% MBE for the 2004 model, which compares well with the previous research (Kreider and Haberl 1994; Bou-Saada 1994; ASHRAE 2002). It was found that the end-use EUIs, such as cooling, heating, and Motor Control Center (MCC) electricity use can begin to provide information about the building’s heating and cooling efficiencies compared to similar buildings in a control groups. It was also determined that the REJ building is 20.79% more efficient than the Standard 90.1-1989 and approximately equal to the Standard 90.1-2001. Using an ECDM-subtraction method, the REJ building was shown to use approximately 67% less energy than the base-case building wi

Song, Suwon

2007-09-25T23:59:59.000Z

318

Performance Evaluation for Modular, Scalable Cooling Systems with Hot Aisle Containment in Data Centers  

Science Conference Proceedings (OSTI)

Scientific and enterprise data centers, IT equipment product development, and research data center laboratories typically require continuous cooling to control inlet air temperatures within recommended operating levels for the IT equipment. The consolidation and higher density aggregation of slim computing, storage and networking hardware has resulted in higher power density than what the raised-floor system design, coupled with commonly used computer rack air conditioning (CRAC) units, was originally conceived to handle. Many existing data centers and newly constructed data centers adopt CRAC units, which inherently handle heat transfer within data centers via air as the heat transfer media. This results in energy performance of the ventilation and cooling systems being less than optimal. Understanding the current trends toward higher power density in IT computing, more and more IT equipment manufacturers are designing their equipment to operate in 'conventional' data center environments, while considering provisions of alternative cooling solutions to either their equipment or supplemental cooling in rack or row systems. Naturally, the trend toward higher power density resulting from current and future generations of servers has, in the meanwhile, created significant opportunities for precision cooling suppliers to engineer and manufacture packaged modular and scalable systems. The modular and scalable cooling systems aim at significantly improving efficiency while addressing the thermal challenges, improving reliability, and allowing for future needs and growth. Such pre-engineered and manufactured systems may be a significant improvement over current design; however, without an energy efficiency focus, their applications could also lead to even lower energy efficiencies in the overall data center infrastructure. The overall goal of the project supported by California Energy Commission was to characterize four commercially available, modular cooling systems installed in a data center. Such modular cooling systems are all scalable localized units, and will be evaluated in terms of their operating energy efficiency in a real data center, respectively, as compared to the energy efficiency of traditional legacy data center cooling systems. The technical objective of this project was to evaluate the energy performance of one of the four commercially available modular cooling systems installed in a data center in Sun Microsystems, Inc. This report is the result of a test plan that was developed with the industrial participants input, including specific design and operating characteristics of the selected modular localized cooling solution provided by vendor 2. The technical evaluation included monitoring and measurement of selected parameters, and establishing and calculating energy efficiency metrics for the selected cooling product, which is a modular, scalable pair of chilled water cooling modules that were tested in a hot/cold aisle environment with hot aisle containment. The scope of this report is to quantify energy performance of the modular cooling unit in operation as it corresponds to a combination of varied server loads and inlet air temperatures. The information generated from this testing when combined with a concurrent research study to document the energy efficiency of the host data center's central chilled water cooling plant can be used to estimate potential energy savings from implementing modular cooling compared to conventional cooling in data centers.

Adams, Barbara J

2009-05-01T23:59:59.000Z

319

Performance Evaluation for Modular, Scalable Overhead Cooling Systems In Data Centers  

Science Conference Proceedings (OSTI)

Scientific and enterprise data centers, IT equipment product development, and research data center laboratories typically require continuous cooling to control inlet air temperatures within recommended operating levels for the IT equipment. The consolidation and higher density aggregation of slim computing, storage and networking hardware has resulted in higher power density than what the raised-floor system design, coupled with commonly used computer rack air conditioning (CRAC) units, was originally conceived to handle. Many existing data centers and newly constructed data centers adopt CRAC units, which inherently handle heat transfer within data centers via air as the heat transfer media. This results in energy performance of the ventilation and cooling systems being less than optimal. Understanding the current trends toward higher power density in IT computing, more and more IT equipment manufacturers are designing their equipment to operate in 'conventional' data center environments, while considering provisions of alternative cooling solutions to either their equipment or supplemental cooling in rack or row systems. Naturally, the trend toward higher power density resulting from current and future generations of servers has, in the meanwhile, created significant opportunities for precision cooling suppliers to engineer and manufacture packaged modular and scalable systems. The modular and scalable cooling systems aim at significantly improving efficiency while addressing the thermal challenges, improving reliability, and allowing for future needs and growth. Such pre-engineered and manufactured systems may be a significant improvement over current design; however, without an energy efficiency focus, their applications could also lead to even lower energy efficiencies in the overall data center infrastructure. The overall goal of the project supported by California Energy Commission was to characterize four commercially available, modular cooling systems installed in a data center. Such modular cooling systems are all scalable localized units, and will be evaluated in terms of their operating energy efficiency in a real data center, respectively, as compared to the energy efficiency of traditional legacy data center cooling systems. The technical objective of this project was to evaluate the energy performance of one of the four commercially available modular cooling systems installed in a data center in Sun Microsystems, Inc. This report is the result of a test plan that was developed with the industrial participants' input, including specific design and operating characteristics of the selected modular localized cooling solution provided by vendor 1. The technical evaluation included monitoring and measurement of selected parameters, and establishing and calculating energy efficiency metrics for the selected cooling product, which is a modular, scalable overhead cooling system. The system was tested in a hot/cold aisle environment without separation, or containment or the hot or cold aisles. The scope of this report is to quantify energy performance of the modular cooling unit in operation as it corresponds to a combination of varied server loads and inlet air temperatures. The information generated from this testing when combined with a concurrent research study to document the energy efficiency of the host data center's central chilled water cooling plant can be used to estimate potential energy savings from implementing modular cooling compared to conventional cooling in data centers.

Xu, TengFang T.

2009-05-01T23:59:59.000Z

320

Performance Evaluation for Modular, Scalable Liquid-Rack Cooling Systems in Data Centers  

SciTech Connect

Scientific and enterprise data centers, IT equipment product development, and research data center laboratories typically require continuous cooling to control inlet air temperatures within recommended operating levels for the IT equipment. The consolidation and higher density aggregation of slim computing, storage and networking hardware has resulted in higher power density than what the raised-floor system design, coupled with commonly used computer rack air conditioning (CRAC) units, was originally conceived to handle. Many existing data centers and newly constructed data centers adopt CRAC units, which inherently handle heat transfer within data centers via air as the heat transfer media. This results in energy performance of the ventilation and cooling systems being less than optimal. Understanding the current trends toward higher power density in IT computing, more and more IT equipment manufacturers are designing their equipment to operate in 'conventional' data center environments, while considering provisions of alternative cooling solutions to either their equipment or supplemental cooling in rack or row systems. In the meanwhile, the trend toward higher power density resulting from current and future generations of servers has created significant opportunities for precision cooling suppliers to engineer and manufacture packaged modular and scalable systems. The modular and scalable cooling systems aim at significantly improving efficiency while addressing the thermal challenges, improving reliability, and allowing for future needs and growth. Such pre-engineered and manufactured systems may be a significant improvement over current design; however, without an energy efficiency focus, their applications could also lead to even lower energy efficiencies in the overall data center infrastructure. The overall goal of the project supported by California Energy Commission was to characterize four commercially available, modular cooling systems installed in a data center. Such modular cooling systems are all scalable localized units, and will be evaluated in terms of their operating energy efficiency in a real data center, respectively, as compared to the energy efficiency of traditional legacy data center cooling systems. The technical objective of this project was to evaluate the energy performance of one of the four commercially available modular cooling systems installed in a data center in Sun Microsystems, Inc. This report is the result of a test plan that was developed with the industrial participants input, including specific design and operating characteristics of the selected modular localized cooling solution provided by vendor 3. The technical evaluation included monitoring and measurement of selected parameters, and establishing and calculating energy efficiency metrics for the selected cooling product, which is a modular, scalable liquid-rack cooling system in this study. The scope is to quantify energy performance of the modular cooling unit in operation as it corresponds to a combination of varied server loads and inlet air temperatures, under various chilled-water supply temperatures. The information generated from this testing when combined with documented energy efficiency of the host data center's central chilled water cooling plant can be used to estimate potential energy savings from implementing modular cooling compared to conventional cooling in data centers.

Xu, TengFang

2009-05-01T23:59:59.000Z

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321

Performance Evaluation for a Modular, Scalable Passive Cooling System in Data Centers  

Science Conference Proceedings (OSTI)

Scientific and enterprise data centers, IT equipment product development, and research data center laboratories typically require continuous cooling to control inlet air temperatures within recommended operating levels for the IT equipment. The consolidation and higher density aggregation of slim computing, storage and networking hardware has resulted in higher power density than what the raised-floor system design, coupled with commonly used computer rack air conditioning (CRAC) units, was originally conceived to handle. Many existing data centers and newly constructed data centers adopt CRAC units, which inherently handle heat transfer within data centers via air as the heat transfer media. This results in energy performance of the ventilation and cooling systems being less than optimal. Understanding the current trends toward higher power density in IT computing, more and more IT equipment manufacturers are designing their equipment to operate in 'conventional' data center environments, while considering provisions of alternative cooling solutions to either their equipment or supplemental cooling in rack or row systems. In the meanwhile, the trend toward higher power density resulting from current and future generations of servers has created significant opportunities for precision cooling to engineer and manufacture packaged modular and scalable systems. The modular and scalable cooling systems aim at significantly improving efficiency while addressing the thermal challenges, improving reliability, and allowing for future needs and growth. Such pre-engineered and manufactured systems may be a significant improvement over current design; however, without an energy efficiency focus, their applications could also lead to even lower energy efficiencies in the overall data center infrastructure. The overall goal of the project supported by California Energy Commission was to characterize four commercially available, modular cooling systems installed in a data center. Such modular cooling systems are all scalable localized units, and will be evaluated in terms of their operating energy efficiency in a real data center, respectively, as compared to the energy efficiency of traditional legacy data center cooling systems. The technical objective of this project was to evaluate the energy performance of one of the four commercially available modular cooling systems installed in a data center in Sun Microsystems, Inc. This report is the result of a test plan that was developed with the industrial participants input, including specific design and operating characteristics of the selected passive, modular localized cooling solution provided by vendor 4. The technical evaluation included monitoring and measurement of selected parameters, and establishing and calculating energy efficiency metrics for the selected cooling product, which is a passive, modular, scalable liquid cooling system in this study. The scope is to quantify energy performance of the modular cooling unit corresponding to various server loads and inlet air temperatures, under various chilled-water supply temperatures. The information generated from this testing when combined with documented energy efficiency of the host data center's central chilled water cooling plant can be used to estimate potential energy savings from implementing modular cooling compared to conventional cooling in data centers.

Xu, TengFang

2009-05-01T23:59:59.000Z

322

AERMOD: A Dispersion Model for Industrial Source Applications. Part II: Model Performance against 17 Field Study Databases  

Science Conference Proceedings (OSTI)

The performance of the American Meteorological Society (AMS) and U.S. Environmental Protection Agency (EPA) Regulatory Model (AERMOD) Improvement Committee’s applied air dispersion model against 17 field study databases is described. AERMOD is a ...

Steven G. Perry; Alan J. Cimorelli; Robert J. Paine; Roger W. Brode; Jeffrey C. Weil; Akula Venkatram; Robert B. Wilson; Russell F. Lee; Warren D. Peters

2005-05-01T23:59:59.000Z

323

Evaluation of a single cell and candidate materials with high water content hydrogen in a generic solid oxide fuel cell stack test fixture, Part II: materials and interface characterization  

Science Conference Proceedings (OSTI)

A generic solid oxide fuel cell (SOFC) test fixture was developed to evaluate candidate materials under realistic conditions. A commerical 50 mm x 50 mm NiO-YSZ anode supported thin YSZ electrolyte cell with lanthanum strontium manganite (LSM) cathode was tested to evaluate the stability of candidate materials. The cell was tested in two stages at 800oC: stage I of low (~3% H2O) humidity and stage II of high (~30% H2O) humidity hydrogen fuel at constant voltage or constant current mode. Part I of the work was published earlier with information of the generic test fixture design, materials, cell performance, and optical post-mortem analysis. In part II, detailed microstructure and interfacial characterizations are reported regarding the SOFC candidate materials: (Mn,Co)-spinel conductive coating, alumina coating for sealing area, ferritic stainless steel interconnect, refractory sealing glass, and their interactions with each other. Overall, the (Mn,Co)-spinel coating was very effective in minimizing Cr migration. No Cr was identified in the cathode after 1720h at 800oC. Aluminization of metallic interconnect also proved to be chemically compatible with alkaline-earth silicate sealing glass. The details of interfacial reaction and microstructure development are discussed.

Chou, Y. S.; Stevenson, Jeffry W.; Choi, Jung-Pyung

2013-01-01T23:59:59.000Z

324

Performance evaluation of the Shenandoah Community Solar Recreational Center for the year 1980. Final report  

DOE Green Energy (OSTI)

The Shenandoah Solar Recreational Center, when completed in early 1977, was the largest building to have most of its heating, air conditioning, and hot water needs met by solar energy. Principal components of the building solar energy system are a 1121 sq-m array of modularized flat plate collectors with 2300 sq-m of aluminum foreground reflectors integrated into a sawtooth wood truss roof, a 15.1 cu-m collector loop buffer tank, a 56.8 cu-m hot water storage tank, two 113.6 cu-m chilled water storage tanks, and a nominal 100 ton single stage absorption chiller. The system is interconnected by means of primary-secondary loops and was designed for simultaneous operation of all subsystems in either the heating or cooling modes. Control is by means of conventional HVAC pneumatic and electric control equipment. Transient thermal simulation studies were used to design the solar energy system. The collector array size was fixed so as to provide a significant fraction of the building annual thermal load, and the hot and chilled water storage volumes and other system functions were sized to maximize economic benefit. On this basis the predicted solar fractions were 95% space heating, 64% space cooling and 50% hot water. The building operation was monitored for a period on one year (February 1980 through February 1981) using a calculator-based data acquisition system with 80 sensors located throughout the building. This report presents an analysis of this data and an evaluation of the building performance over the year. The annual collector efficiency was found to be 19% and the overall annual solar fraction (combined thermal loads met from solar) was determined to be 39%. It is felt that this level of performance for a demonstration system is quite acceptable.

Craig, J.I.; Jeter, S.M.

1983-12-01T23:59:59.000Z

325

DE-AC02-76SF00515 Contractor Performance Evaluation and  

E-Print Network (OSTI)

............................................................ 26 4.3 PROVIDE EFFICIENT AND EFFECTIVE CORPORATE OFFICE SUPPORT AS APPROPRIATE II FY08 APPENDIX B PROGRAM OFFICE SCORE FOR EACH GOAL (STANFORD LINEAR ACCELERATOR CENTER set forth within this plan have been developed in coordination with HQ program offices as appropriate

Wechsler, Risa H.

326

Evaluation of PEMFC System Contaminants on the Performance of Pt Catalyst via Cyclic Voltammetry: Preprint  

DOE Green Energy (OSTI)

Using electrochemical cyclic voltammetry as a quick ex-situ screening tool, the impact of the extracted solution and the individual leachable constituents from prospective BOP component materials on the performance and recoverability of the platinum catalyst were evaluated. Taking an extract from Zytel{trademark} HTN51G35HSLR (PPA) as an example, the major leachable organic components are caprolactam and 1,6 hexanediol. While these organic compounds by themselves do poison the Pt catalyst to some extent, such influence is mostly recoverable by means of potential holding and potential cycling. The extracted solution, however, shows a more drastic poisoning effect and it was not recoverable. Therefore the non-recoverable poisoning effect observed for the extracted solution is not from the two organic species studied. This demonstrates the complexity of such a contaminant study. Inorganic compounds that are known poisons like sulfur even in very low concentrations, may have a more dominant effect on the Pt catalyst and the recoverability.

Wang, H.; Macomber, C.; Dinh, H. N.

2012-07-01T23:59:59.000Z

327

16.2 - Performance Evaluation and Measurement Plans for Cost-Reimbursement, Non-Management and Operating Contracts  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Chapter 16.2 (July 2012) Chapter 16.2 (July 2012) 1 Performance Evaluation and Measurement Plans for Cost-Reimbursement, Non- Management and Operating Contracts [Reference: FAR 6, FAR 16, FAR 22, FAR 32, FAR 46, DEAR 915.404-4-72, DEAR 916.405-2, DEAR 970.1504-1, and Acquisition Guide Chapter 16.1] Overview The policy of the DOE is to maximize contractor performance and to align costs with performance through the use of performance-based management as a strategic contract management tool to plan for, manage, and evaluate contractor performance. An important function of contract administration is the ability, or the opportunity, to manage the environment within which the contracted effort is proceeding and, most importantly, to facilitate adjustments to that effort to meet the demand and changes as

328

Beyond accuracy, f-score and ROC: a family of discriminant measures for performance evaluation  

Science Conference Proceedings (OSTI)

Different evaluation measures assess different characteristics of machine learning algorithms. The empirical evaluation of algorithms and classifiers is a matter of on-going debate among researchers. Most measures in use today focus on a classifier's ...

Marina Sokolova; Nathalie Japkowicz; Stan Szpakowicz

2006-12-01T23:59:59.000Z

329

VALVE FUNNEL SPRING PIN PRESS PERFORMANCE AND FUNCTIONAL REQUIREMENTS EVALUATION FOR SPECIAL TOOLS AND EQUIPMENT  

SciTech Connect

This evaluation allows use of the valve funnel spring pin press and describes appropriate handling instructions for the tool. The engineering evaluation is required for operations and field use of special tools and equipment.

WITHERSPOON JT

2009-12-30T23:59:59.000Z

330

The Effect of Performance-Based Financial Incentives on Improving Patient Care Experiences: A Statewide Evaluation  

E-Print Network (OSTI)

Organizational and market influences on physician performance on patient experience measures. Health

Rodriguez, Hector P.; Glahn, Ted; Elliott, Marc N.; Rogers, William H.; Safran, Dana Gelb

2009-01-01T23:59:59.000Z

331

Evaluating the Performance of a Surface Barrier on Reducing Soil-Water Flow  

SciTech Connect

One of the most common effective techniques for contaminant remediation in the vadose zone is to use a surface barrier to reduce or eliminate soil-water flow to reduce the contaminant flux to the underlying groundwater. Confirming the reduction of the soil-water flux rate is challenging because of the difficulty of determining the very low soil-water flux beneath the barrier. We propose a hydraulic-conductivity factor, fK, as a conservative indicator for quantifying the reduction of soil-water flow. The factor can be calculated using the measured soil-water content or pressure but does not require the knowledge of the saturated hydraulic conductivity or the hydraulic gradient. The formulas were tested by comparing with changes in hydraulic conductivity, K, from a drainage experiment. The pressure-based formula was further applied to evaluate the performance of the interim surface barrier at T Tank Farm on Hanford Site. Three years after barrier emplacement, the hydraulic conductivity decreased by a factor between 3.8 and 13.0 at the 1-, 2- and 5-m depths. The difference between the conductivity-reduction factor and the flux-rate-reduction factor, fq, was quantified with a numerical simulation. With the calculated fK, the numerically determined fK/fq ratio, and the assumed pre-barrier soil-water flux rate of 100 mm yr-1, the estimated soil-water flux rate 3 years after barrier emplacement was no more than 8.5 mm yr-1 at or above the 5-m depth.

Zhang, Z. F.; Strickland, Christopher E.; Field, Jim G.; Parker, Danny L.; Clayton, Ray E.

2012-08-31T23:59:59.000Z

332

Performance evaluation of a grid computing architecture using realtime network monitoring  

Science Conference Proceedings (OSTI)

This paper integrates the concepts of realtime network monitoring and visualizations into a grid computing architecture on the Internet. We develop a Realtime Network Monitor(RNM) that performs realtime network monitoring in order to improve the performance ...

Young-Sik Jeong; Cheng-Zhong Xu

2004-12-01T23:59:59.000Z

333

Commercial remodeling : using computer graphic imagery to evaluate building energy performance during conceptual redesign  

E-Print Network (OSTI)

This research is an investigation of the relationship between commercial remodeling and building thermal performance. A computer graphic semiotic is developed to display building thermal performance based on this relationship. ...

Williams, Kyle D

1985-01-01T23:59:59.000Z

334

Interim Test Procedures for Evaluating Electrical Performance and Grid Integration of Vehicle-to-Grid Applications  

DOE Green Energy (OSTI)

The objective of this report is to provide a test plan for V2G testing. The test plan is designed to test and evaluate the vehicle's power electronics capability to provide power to the grid, and to evaluate the vehicle's ability to connect and disconnect from the utility according to a subset of the IEEE Std. 1547 tests.

Chakraborty, S.; Kramer, W.; Kroposki, B.; Martin, G.; McNutt, P.; Kuss, M.; Markel, T.; Hoke, A.

2011-06-01T23:59:59.000Z

335

The evaluation of sorghum contaminated with ergot on broiler chicken performance  

E-Print Network (OSTI)

The objective of these four experiments was to conduct an evaluation of the performance of broiler chickens fed sorghum contaminated with ergot sphacelia/sclerotia of Claviceps africana present in tailings removed by conditioning of seed from grain sorghum hybrid seed production gelds near Uvalde (Experiments 1 and 2) and Dumas (Experiments 3 and 4), Texas. Percentage of sphacelia/sclerotia and total alkaloid content, respectively, in the sorghum contaminated with ergot tailings were 8% and 11.3 ppm for Uvalde, and 75% and 235 ppm for Dumas in Experiment 3. Total alkaloid content in the extracted Dumas sample in Experiment 4 was 266.9 ppm. All diets were based on the NRC (1994) requirements for broilers. Hatch to 3-week-old male broilers in Experiment 1 fed sorghum contaminated with ergot showed significant reduction in growth at week three. Relative liver weights in ergot fed birds were significantly greater than control. Hatch to 6-week-old straight-run broilers in Experiment 2 were raised on a three-phase feeding program. Sorghum contaminated with ergot significantly reduced growth in broilers at Weeks 4, 5, and 6. Feed conversion was significantly reduced during all three phases of feeding. In Experiment 3, control sorghum and the 75% ergot tailings were added to corn-soy basal diets at 2.5, 5, and 10% by weight. These male chicks were fed from hatch to 3-weeks of age. Sorghum contaminated with ergot did not significantly reduce growth, but, during Weeks 2 and 3, feed conversions were significantly higher. Neither type nor concentration of sorghum contaminated with ergot significantly affected relative liver weights. In Experiment 4, alkaloids were extracted from ergot sphacelia/sclerotia, added to a corn-soy basal diet, and fed from hatch to 4-week-old male broilers. Sorghum contaminated with ergot significantly increased feed conversion in Week 2. Significantly higher levels of glucose and triglycerides were found in broilers fed sorghum contaminated with ergot. We did not observe significant mortality or obvious signs of ergot toxicity, such as necrotic lesions of the feet or comb, in any of the four experiments. We can conclude that the effects of sorghum contaminated with ergot on broilers will be negligible to broiler production operations.

Fazzino, Johnny Joseph

1999-01-01T23:59:59.000Z

336

Evaluation of the Performance of the PVUSA Rating Methodology Applied to Dual Junction PV Technology: Preprint (Revised)  

DOE Green Energy (OSTI)

The PVUSA (Photovoltaics for Utility Scale Applications) project in the 1990's developed a rating methodology for PV performance evaluation which has become popular, and even incorporated into concentrating PV rating standards This report apply that method to rack-mounted dual-junction PV system, and produces a system rating.

Myers, D. R.

2009-07-01T23:59:59.000Z

337

Evaluating the Performance of Planetary Boundary Layer and Cloud Microphysical Parameterization Schemes in Convection-Permitting Ensemble Forecasts using  

E-Print Network (OSTI)

uncertainty in how to include various processes (e.g., drop breakup and ice-phase categories 1 Evaluating the Performance of Planetary Boundary Layer and Cloud Microphysical Parameterization In this study, the ability of several cloud microphysical and planetary boundary layer parameterization schemes

Xue, Ming

338

Simulation studies to evaluate the effect of fracture closure on the performance of naturally fractured reservoirs. Annual report  

SciTech Connect

The first of a three-year research program to evaluate the effect of fracture closure on the recovery of oil and gas from naturally fractured reservoirs has been completed. The objectives of the study are to (1) evaluate the reservoir conditions where fracture closure is significant, and (2) evaluate innovative fluid injection techniques capable of maintaining pressure within the reservoir. Simulation studies were conducted with a dual porosity simulator capable of simulating the performance of vertical and horizontal wells. Each simulator was initialized using properties typical of the Austin Chalk reservoir in Pearsall Field, Texas. Simulations of both vertical and horizontal well performance were made assuming that fracture permeability was insensitive to pressure change. Sensitivity runs indicate that the simulator is predicting the effects of critical reservoir parameters in a logical and consistent manner. The results to-date confirm that horizontal wells can increase both oil recovery rate and total oil recovery from naturally fractured reservoirs. The year one simulation results will provide the baseline for the ongoing study which will evaluate the performance degradation caused by the sensitivity of fracture permeability to pressure change, and investigate fluid injection pressure maintenance as a means to improve oil recovery performance. The study is likely to conclude that fracture closure decreases oil recovery and that pressure support achieved through fluid injection could be beneficial in improving recovery.

Not Available

1991-10-01T23:59:59.000Z

339

812 IEEE TRANSACTIONS ON PARALLEL AND DISTRIBUTED SYSTEMS, VOL. 6. NO. 8. AUGUST 1995 Comparative Performance Evaluation  

E-Print Network (OSTI)

pres- ents performance models for evaluating hot spot effects in terms of remote access delay model described in [16], we present a remote access delay model in the presence of memory hot spots, T is the switch delay, and & is the average hot spot request rate. Including a hot spot to the remote memory delay

340

Methodologies and new user interfaces to optimize hydraulic fracturing design and evaluate fracturing performance for gas wells  

E-Print Network (OSTI)

This thesis presents and develops efficient and effective methodologies for optimal hydraulic fracture design and fracture performance evaluation. These methods incorporate algorithms that simultaneously optimize all of the treatment parameters while accounting for required constraints. Damage effects, such as closure stress, gel damage and non-Darcy flow, are also considered in the optimal design and evaluation algorithms. Two user-friendly program modules, which are active server page (ASP) based, were developed to implement the utility of the methodologies. Case analysis was executed to demonstrate the workflow of the two modules. Finally, to validate the results from the two modules, results were compared to those from a 3D simulation program. The main contributions of this work are: An optimal fracture design methodology called unified fracture design (UFD) is presented and damage effects are considered in the optimal design calculation. As a by-product of UFD, a fracture evaluation methodology is proposed to conduct well stimulation performance evaluation. The approach is based on calculating and comparing the actual dimensionless productivity index of fractured wells with the benchmark which has been developed for optimized production. To implement the fracture design and evaluation methods, two web ASP based user interfaces were developed; one is called Frac Design (Screening), and the other is Frac Evaluation. Both modules are built to hold the following features. o Friendly web ASP based user interface o Minimum user input o Proppant type and mesh size selection o Damage effects consideration options o Convenient on-line help.

Wang, Wenxin

2005-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "ii performance evaluation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Lessons Learned from Field Evaluation of Six High-Performance Buildings: Preprint  

DOE Green Energy (OSTI)

The energy performance of six high-performance buildings around the United States was monitored in detail. The six buildings include the Visitor Center at Zion National Park; the National Renewable Energy Laboratory's Thermal Test Facility; the Chesapeake Bay Foundation's Merrill Center; The BigHorn Home Improvement Center; the Cambria DEP Office Building; and the Oberlin College Lewis Center. This paper discusses the design energy targets and actual performance.

Torcellini, P.; Deru, M.; Griffith, B.; Long, N.; Pless, S.; Judkoff, R.; Crawley, D. B.

2004-07-01T23:59:59.000Z

342

Modeling studies to evaluate performance of the horizontal wells completed in shale.  

E-Print Network (OSTI)

??The results of the modeling studies to determine the production performance of multiple fractured horizontal wells completed in shale formation has been summarized in this… (more)

Belyadi, Abbas.

2011-01-01T23:59:59.000Z

343

Evaluating the energy performance of the first generation of LEED-certified commercial buildings  

E-Print Network (OSTI)

Department of Energy, Energy Star Building Rating Program.a simulation of the building's energy performance to qualifythe simulated whole building energy consumption with the

Diamond, Rick

2011-01-01T23:59:59.000Z

344

An Early Performance Evaluation of the NEXRAD Dual Polarization Radar Rainfall Estimates for Urban Flood Applications  

Science Conference Proceedings (OSTI)

Dual polarization radars are expected to provide better rainfall estimates than single polarization radars due to their ability to characterize hydrometeor type. The goal of this study is to evaluate single and dual polarization radar rainfall ...

Luciana K. Cunha; James A. Smith; Mary Lynn Baeck; Witold F. Krajewski

345

Psychophysical evaluations of modulated color rendering for energy performance of LED-based architectural lighting  

E-Print Network (OSTI)

This thesis is focused on the visual perception evaluation of colors within an environment of a highly automated lighting control strategy. Digitally controlled lighting systems equipped with light emitting diodes, LEDs, ...

Thompson, Maria do Rosário

2007-01-01T23:59:59.000Z

346

ANN and ANFIS models for performance evaluation of a vertical ground source heat pump system  

Science Conference Proceedings (OSTI)

The aim of this study is to demonstrate the comparison of an artificial neural network (ANN) and an adaptive neuro-fuzzy inference system (ANFIS) for the prediction performance of a vertical ground source heat pump (VGSHP) system. The VGSHP system using ... Keywords: Adaptive neuro-fuzzy inference system, Coefficient of performance, Ground source heat pump, Membership functions, Vertical heat exchanger

Hikmet Esen; Mustafa Inalli

2010-12-01T23:59:59.000Z

347

Evaluation of the impact chip multiprocessors have on SNL application performance.  

Science Conference Proceedings (OSTI)

This report describes trans-organizational efforts to investigate the impact of chip multiprocessors (CMPs) on the performance of important Sandia application codes. The impact of CMPs on the performance and applicability of Sandia's system software was also investigated. The goal of the investigation was to make algorithmic and architectural recommendations for next generation platform acquisitions.

Doerfler, Douglas W.

2009-10-01T23:59:59.000Z

348

Design and performance evaluation of a low-power data-line SRAM sense amplifier  

E-Print Network (OSTI)

The SRAM which functions as the cache for system-on-chip is vital in the electronic industry. The heavy bit-and data-line capacitances are the major road blocks to its performance. A high-performance SRAM is proposed using ...

Fu, Haitao

349

Performance evaluation of QoS-routing methods for IP-based multiservice networks  

Science Conference Proceedings (OSTI)

This paper provides a performance analysis of lost/delayed traffic and control load for various quality of service (QoS)-routing methods, which control a network's response to traffic demands and other stimuli, such as traffic overloads, link failures, ... Keywords: Enhance network scalability, Performance analysis, QoS Routing, Traffic overload

Gerald R Ash

2003-05-01T23:59:59.000Z

350

Fast compiler optimisation evaluation using code-feature based performance prediction  

Science Conference Proceedings (OSTI)

Performance tuning is an important and time consuming task which may have to be repeated for each new application and platform. Although iterative optimisation can automate this process, it still requires many executions of different versions of the ... Keywords: architecture, artificial neural networks, compiler optimisation, learning, machine, performance modelling

Christophe Dubach; John Cavazos; Björn Franke; Grigori Fursin; Michael F.P. O'Boyle; Olivier Temam

2007-05-01T23:59:59.000Z

351

Energy Performance Evaluation of a Low-Energy Academic Building: Preprint  

SciTech Connect

This paper considers the energy performance analyses conducted to document and verify progress toward the building's design objectives. The authors present and discuss energy performance data and draw lessons that can be applied to improve the design of this and future low-energy buildings.

Pless, S.; Torcellini, P.

2005-10-01T23:59:59.000Z

352

Energy Performance Evaluation of a Low-Energy Academic Building: Preprint  

SciTech Connect

This paper considers the energy performance analyses conducted to document and verify progress toward the building's design objectives. The authors present and discuss energy performance data and draw lessons that can be applied to improve the design of this and future low-energy buildings.

Pless, S.; Torcellini, P.

2005-10-01T23:59:59.000Z

353

A Decentralized Deployment Strategy and Performance Evaluation of LCG File Catalog Service  

Science Conference Proceedings (OSTI)

The LHC Computing Grid (LCG) leads by CERN, has solved with the LCG File Catalog (LFC) the major problem of scaling the data management catalog. However, additional performance issues should be faced to deploy a painless catalog service. With this aim, ... Keywords: Catalog, Distributed computing, Grid computing, Performance

Víctor Méndez Muñoz; Gabriel Amorós Vicente; Mohammed Kaci

2011-09-01T23:59:59.000Z

354

Interim Test Procedures for Evaluating Electrical Performance and Grid Integration of Vehicle-to-Grid Applications  

SciTech Connect

The objective of this report is to provide a test plan for V2G testing. The test plan is designed to test and evaluate the vehicle's power electronics capability to provide power to the grid, and to evaluate the vehicle's ability to connect and disconnect from the utility according to a subset of the IEEE Std. 1547 tests.

Chakraborty, S.; Kramer, W.; Kroposki, B.; Martin, G.; McNutt, P.; Kuss, M.; Markel, T.; Hoke, A.

2011-06-01T23:59:59.000Z

355

Seismic Performance Evaluation of the Jacket Type Offshore Platforms through Incremental Dynamic Analysis considering Soil-Pile-Structure Interaction  

Science Conference Proceedings (OSTI)

Of great interest in Performance-Based Earthquake Engineering (PBEE) is the accurate estimation of the seismic performance of structures. A performance prediction and evaluation procedure is based on nonlinear dynamics and reliability theory. In this method, a full integration over the three key stochastic models is as follow: ground motion hazard curve, nonlinear dynamic displacement demand, and displacement capacity. Further, both epistemic and aleatory uncertainties are evaluated and carried through the analysis.In this paper, jacket and soil-pile system have been modeled using Finite Element program (OpenSees) and the incremental dynamic analysis (IDA) are performed to investigate nonlinear behavior of offshore platforms. The system demand is determined by performing time history response analyses of the jacket under a suite of FEMA/SAC uniform hazard ground motions. The system capacity in terms of the drift ratio against incipient collapse is generally difficult to predict since the structural response goes into nonlinear range before collapse. All the analyses are performed in two directions and the results are compared with each others. The confidence level of a jacket in each direction for a given hazard level is calculated using the procedure described.

Asgarian, Behrouz [K.N. Toosi University of Technology Tehran Iran (Iran, Islamic Republic of); Shokrgozar, Hamed R.; Talarposhti, Ali Shakeri [K.N. Toosi University of Technology, Tehran (Iran, Islamic Republic of)

2008-07-08T23:59:59.000Z

356

Energy Performance Evaluation and Development of Control Strategies for the Air-conditioning System of a Building at Construction Stage  

E-Print Network (OSTI)

Energy consumption of HVAC systems in commercial buildings takes a great part of the total building energy consumption. Energy performance evaluation plays an important role in building energy efficiency improvement for existing buildings and new buildings. It is also the basis for the retrofitting measure evaluation for existing buildings and the control improvement evaluation of new buildings for building energy performance contracts. In this study, the energy performance evaluation of a super high-rising commercial office building in construction is presented. Alternative control strategies are proposed to improve the energy efficiency based on the current measurements of the original design as well as additional metering instruments as requested. These control strategies mainly involve optimal chiller sequencing control, cooling tower sequencing control, optimal water pressure differential set-point control, AHU supply air static pressure reset control and DCV-based fresh air control, etc. To assess the economic feasibility, the benchmark electricity consumption and the optimal electricity consumption using alternative controls strategies are estimated using dynamic simulations. The results show that the electricity savings using the alternative control strategies can cover the costs of an additional metering system and related software and hardware in about one year.

Wang, S.; Xu, X.; Ma, Z.

2006-01-01T23:59:59.000Z

357

Summerwood Associates, House M, Old Saybrook, Connecticut: Solar energy system performance evaluation, June 1980-May 1981  

DOE Green Energy (OSTI)

Summerwood Associates, House M is a single-family rowhouse residence in Connecticut. The active solar energy system is designed to supply 78% of the space heating and 100% of the hot water loads. It is equipped with 378 square feet of flat plate collectors, a 600-gallon concrete storage tank, and for auxiliary heating, a heat pump and electrical resistance heater. The system and subsystem performance are measured, including the solar fraction, solar savings ratio, conventional fuel savings, system performance factor, and solar system coefficient of performance. Also given are the system operating energy, energy savings, and weather conditions. (LEW)

Raymond, M.

1981-01-01T23:59:59.000Z

358

USE OF ONE-ON ANALYSIS TO EVALUATE TOTAL SYSTEM PERFORMANCE  

SciTech Connect

This report presents the results of analyses of the hypothetical performance of the various configurations of selected natural and engineered elements of the proposed Yucca Mountain nuclear-waste repository. These analyses were conducted upon the recommendation of the Nuclear Waste Technical Review Board (NWTRB) regarding an alternative approach to investigate the identified natural and engineered barriers and associated processes with respect to the postclosure performance of the proposed Yucca Mountain repository. The analyses were conducted per Technical Work Plan (TWP) TWP-MGR-PA-000011 REV 00, Section 3.2.4, Task 2, which states that the task involves ''Identification of barriers that are important to repository performance:'' by means of ''one-on'' analyses to gain a better understanding of repository performance relative to previously identified barriers.'' The ''One-on Analysis'' was performed per Administrative Procedure AP-SIII.9Q. The NWTRB previously reviewed similar analyses conducted by Electric Power Research Institute (EPRI) (EPRI 2002 [158069]). The approach of the investigation was to simulate the hypothetical performance of the repository after an arbitrarily chosen successive addition of each of the selected natural and engineered barrier components and associated processes that provide for the overall safety of the repository. Because the repository system will behave as an integrated system, the combined interaction of all the processes and barriers identified in this report will provide the ultimate repository performance as indicated in various performance-assessment analyses for the Civilian Radioactive Waste Management System (CRWMS) M&O 2000 [153246]; Bechtel SAIC Company, LLC (BSC) 2001 [155950]; and Williams 2001 [157307]. The analyses presented in this report should not be construed as an indication, for the chosen additive sequence, of the relative importance on any one barrier or process. Rather, the results of these analyses provide an indication of the relative performance of those barriers and processes and an understanding of their contribution to the overall performance of the proposed repository system. The analyses in this report considered the nominal-performance scenario only, and did not address performance following unlikely disruptive events (e.g., volcanic activity) (10 Code of Federal Regulations (CFR) 63.342).

G.J. Saulnier Jr.

2002-12-18T23:59:59.000Z

359

Chest radiographs obtained with shaped filters: evaluation by observer performance tests  

SciTech Connect

The effectiveness of a shaped filter in improving nodule and infiltrate detection was measured by observer performance testing. Seven observers read 152 test radiographs of the chest obtained from human volunteers. Half the test radiographs had target image observer performance in detecting nodule or infiltrate images was compared with the shaped-filter system and with a conventional chest imaging system. The results were analyzed using receiver operating characteristic (ROC) techniques and indicate that the filter technique was not significantly different from the conventional technique in infiltrate depiction. Observer performance in detecting nodules was slightly worse on images obtained with the shaped-filter system.

Kelsey, C.A.; Lane, R.G.; Moseley, R.D.; Mettler, F.A.; Rosenberg, R.D.; Williams, A.G.; Garcia, J.F.; Feldman, B.S.; Boardman, R.E.

1986-06-01T23:59:59.000Z

360

Evaluation of the Trade-Off between Power Consumption and Performance in Bluetooth Based Systems  

Science Conference Proceedings (OSTI)

To further increase the applicability of Bluetooth in real appli- cations, reducing the energy consumption and hardware cost are important research topics. In this paper we examine the trade-off between power consumption and performance for our experimen- ...

Juan-Carlos Cano; Jose-Manuel Cano; Carlos Calafate; Eva Gonzalez; Pietro Manzoni

2007-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "ii performance evaluation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Solar energy system performance evaluation: Aratex Services, Fresno, California, December 1979-November 1980  

SciTech Connect

Solar preheated water is supplied to a commercial laundry plant by an active system consisting of 6528 square feet of single glazed flat-plate collectors, 12,500-gallon fiberglass storage tank, auxiliary steam boilers, and a 16,500-gallon water pump with tube-shell heat exchanger for feedwater preheat. The system is designed to provide 20% of the water heating load by solar energy. The solar fraction measured is 18%. Other measures of performance are given, including solar savings ratio, conventional fuel savings, system performance factor, and solar coefficient of performance. The collector, storage, laundry hot water, and heat recovery subsystem performances are also discussed. The laundry's operating energy and weather data are given. (LEW)

Howard, B.D.

1980-01-01T23:59:59.000Z

362

Using Temporal Modes of Rainfall to Evaluate the Performance of a Numerical Weather Prediction Model  

Science Conference Proceedings (OSTI)

The authors demonstrate that much can be learned about the performance of a numerical weather prediction (NWP) model by examining the temporal modes of its simulated rainfall. Observations from the Weather Surveillance Radar-1988 Doppler (WSR-88D)...

Jason C. Knievel; David A. Ahijevych; Kevin W. Manning

2004-12-01T23:59:59.000Z

363

Reedy Creek Utilities, Lake Buena Vista, Florida, solar energy system performance evaluation, December 1979-March 1980  

DOE Green Energy (OSTI)

The Reedy Creek solar system operated moderately well during the December 1979 through March 1980 heating season. The overall performance of the system was below estimated design performance but the solar system still supplied 47% of the building conditioning loads. The thermal performance is summarized. The system failed to reach design performance levels in the cooling subsystem. Since the cooling load of 40.24 million Btu was nearly three times larger than the space heating and domestic hot water loads of 14.44 million Btu, the overall system performance was significantly reduced. Although collected solar energy exceeds the system load in most months, the solar fraction is necessarily less than 100% due to the normal operating inefficiencies of pumps, heat exchanger, and particularly the absorption chiller. At Reedy Creek, excessive storage losses, presumably due to high storage temperatures, further degrade system performance. Collector array efficiency based on the total incident solar radiation was 11%. This was significantly lower than the 14% collector array efficiency for the 1979 heating season.

Logee, T.

1980-01-01T23:59:59.000Z

364

Evaluation of Model Results and Measured Performance of Net-Zero Energy Homes in Hawaii: Preprint  

SciTech Connect

The Kaupuni community consists of 19 affordable net-zero energy homes that were built within the Waianae Valley of Oahu, Hawaii in 2011. The project was developed for the native Hawaiian community led by the Department of Hawaiian Homelands. This paper presents a comparison of the modeled and measured energy performance of the homes. Over the first year of occupancy, the community as a whole performed within 1% of the net-zero energy goals. The data show a range of performance from house to house with the majority of the homes consistently near or exceeding net-zero, while a few fall short of the predicted net-zero energy performance. The impact of building floor plan, weather, and cooling set point on this comparison is discussed. The project demonstrates the value of using building energy simulations as a tool to assist the project to achieve energy performance goals. Lessons learned from the energy performance monitoring has had immediate benefits in providing feedback to the homeowners, and will be used to influence future energy efficient designs in Hawaii and other tropical climates.

Norton, P.; Kiatreungwattana, K.; Kelly, K. J.

2013-03-01T23:59:59.000Z

365

Evaluation of physical characteristics and phenomena, sensitivity and interaction effects, performance criteria and output requirements for a station keeping subsystem engineering evaluation tool (SKEET)  

DOE Green Energy (OSTI)

The fundamental purpose for SKEET is to provide a means of simulating and evaluating OTEC platform SKSS performance. This evaluation capability may be employed in the process of a design review, comparison of alternative concepts, operational planning, establishing risk and reliability criteria and a host of other applications. However, the central requirement is that SKEET have the capability to predict the excursions on motions of the platform and loads on the SKSS as a result of environmental effects under a range of operational conditions. The principal elements which should be represented by the SKEET model include: environment (wind, current, waves); vessel/CWP configuration; mooring system (including anchor/soil and electrical riser cable interactions); and dynamic positioning system effects. Findings are summarized of the following two tasks that have been undertaken to formulate a definition of the requirements of SKEET: Task III - identify and classify the physical characteristics and phenomena and evaluate interaction effects; and Task IV - establish mooring performance criteria. The objective of Task III was to define the range of physical parameters that must be incorporated into SKEET and to make an assessment of the most appropriate manner in which to incorporate each of those parameters. The objective of Task IV was to define the required outputs from SKEET. (WHK)

Not Available

1979-12-01T23:59:59.000Z

366

A cross-cultural evaluation of HCI student performance: reflections for the curriculum  

Science Conference Proceedings (OSTI)

Human-computer interaction has become a subject taught across universities around the world, outside of the cultures where it originated. However, the implications of its assimilation into the syllabus of courses offered by universities around the world ... Keywords: HCI education, cognitive style, culture, design, evaluation

José Abdelnour-Nocera, Ann Austin, Mario Michaelides, Sunila Modi

2013-07-01T23:59:59.000Z

367

Efficient Sensor Deployment Control Schemes and Performance Evaluation for Obstacle and Unknown Environments  

Science Conference Proceedings (OSTI)

Deployment is a fundamental issue for wireless sensor networks (WSNs). A well-designed deployment control method not only directly influences the number of deployed sensors, but also influences on data accuracy and network topology. Three widely discussed ... Keywords: Deployment, Evaluate factors, Slow-start, Square-encircled, Wireless sensor networks

Hsu-Yang Kung; Chung-Ming Huang; Hao-Hsaing Ku

2008-04-01T23:59:59.000Z

368

Performance-based usability evaluation of a safety information and alarm system  

Science Conference Proceedings (OSTI)

Evaluation of the appropriateness of information technical systems for complex professional usage in safety-critical contexts poses significant methodical and practical challenges. In this study, the usability of a Safety Information and Alarm Panel ... Keywords: control room, information presentation, nuclear power plant, operators, practice, validation method

Leena Norros; Maaria Nuutinen

2005-09-01T23:59:59.000Z

369

A Framework for Evaluating the Effects of Degraded Digital I and C Systems on Human Performance  

Science Conference Proceedings (OSTI)

New and advanced reactors will use integrated digital instrumentation and control (I&C) systems to support operators in their monitoring and control functions. Even though digital systems are typically highly reliable, their potential for degradation or failure could significantly affect operator situation awareness and performance and, consequently, impact plant safety. The U.S. Nuclear Regulatory Commission has initiated a research project to investigate the effects of degraded I&C systems on human performance and plant operations. The ultimate objective of this project is to develop the technical basis for human factors review guidance for conditions of degraded I&C, including complete failure. Based on the results of this effort, NRC will determine the need for developing new guidance or revising NUREG-0800, NUREG-0711, NUREG-0700 and other pertinent NRC review guidance. This paper reports on the first phase of the research, the development of a framework for linking degraded I&C system conditions to human performance. The framework consists of three levels: I&C subsystems, human-system interfaces, and human performance. Each level is composed of a number of discrete elements. This paper will describe the elements at each level and their integration. In the next phase of the research, the framework will be used to systematically investigate the human performance consequences of various classes of failures.

OHara,J.; Gunther, B.; Hughes, N.; Barnes, V.

2009-04-09T23:59:59.000Z

370

Solar house heating system using reflective pyramid optical condensing system. Evaluation of performance, June 1, 1975--December 31, 1976  

DOE Green Energy (OSTI)

The prototype system, previously built on Westover Road, Stamford, Connecticut, was upgraded, instrumented, and evaluated. It was found to perform essentially as expected, but the open construction was found to have problems. A fully enclosed model Pyramidal Optics house was built by Better Homes of Delaware near Rehoboth, Delaware. After a number of significant improvements were made in the optical concentrating system and the flat plate receiver assembly, the system was monitored throughout the winter of 1976/1977 and found to perform very well. The solar contribution to heating amounted to 70 percent during the severe winter months and is expected to exceed 80 percent throughout the year. The Pyramidal Optics system has been found to have a number of economic and operational advantages. It is planned to evaluate additional systems in other locations and different climatic conditions.

Not Available

1978-01-01T23:59:59.000Z

371

[PFP#1102565461  

NLE Websites -- All DOE Office Websites (Extended Search)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Phase II Performance Evaluation . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

372

Evaluation of the Candidate High-Level Radioactive Waste Repository at Yucca Mountain Using Total System Performance Assessment: Phase 5  

Science Conference Proceedings (OSTI)

A successful license application for the candidate spent-fuel and high level waste (HLW) repository at Yucca Mountain depends on a robust demonstration of long-term safety. This report presents EPRI's independent review to identify any conservatisms in the U.S. Depawrtment of Energy's (DOE's) Phase 5 Yucca Mountain Total System Performance Assessment (TSPA). The review specifically identifies key facility components, makes recommendations regarding technical development work priorities, and evaluates ove...

2000-11-21T23:59:59.000Z

373

Evaluation of the Proposed High-Level Radioactive Waste Repository at Yucca Mountain Using Total System Performance Assessment: Phase 6  

Science Conference Proceedings (OSTI)

A successful license application for the candidate spent-fuel and high-level waste repository at Yucca Mountain depends on a robust demonstration of long-term safety. This report presents EPRI's evaluation of, and makes a case for, the suitability of the Yucca Mountain repository using a Total System Performance Assessment (TSPA). The report discusses factors that make the Yucca Mountain repository system suitable for continued development and initiation of the licensing process. Information in this Phas...

2002-02-28T23:59:59.000Z

374

Design and performance evaluations of generic programming techniques in a R&D prototype of Geant4 physics  

E-Print Network (OSTI)

A R&D project has been recently launched to investigate Geant4 architectural design in view of addressing new experimental issues in HEP and other related physics disciplines. In the context of this project the use of generic programming techniques besides the conventional object oriented is investigated. Software design features and preliminary results from a new prototype implementation of Geant4 electromagnetic physics are illustrated. Performance evaluations are presented. Issues related to quality assurance in Geant4 physics modelling are discussed.

M. G. Pia; P. Saracco; M. Sudhakar; A. Zoglauer; M. Augelli; E. Gargioni; C. H. Kim; L. Quintieri; P. P. de Queiroz Filho; D. de Souza Santos; G. Weidenspointner; M. Begalli

2010-01-15T23:59:59.000Z

375

Simulation studies to evaluate the effect of fracture closure on the performance of naturally fractured reservoirs. Annual report  

Science Conference Proceedings (OSTI)

The second year of this three-year research program to evaluate the effect of fracture closure on the recovery of oil and gas from naturally fractured reservoirs has been completed. The overall objectives of the study are to: (1) evaluate the reservoir conditions where fracture closure is significant, and (2) evaluate innovative fluid injection techniques capable of maintaining pressure within the reservoir. Simulation studies have been conducted with a dual porosity simulator capable of simulating the performance of vertical and horizontal wells. Each simulation model has been initialized with properties typical of the Austin Chalk reservoir in Pearsall Field, Texas. During year one, simulations of both vertical and horizontal well performance were made assuming that fracture permeability was insensitive to pressure charge. The results confirmed that horizontal wells could increase both rate of oil recovery and total oil recovery from naturally fractured reservoirs. During the second year the performances of the same vertical and horizontal wells were evaluated with the assumption that fracture permeability was a function of reservoir pressure. This required repetition of most of the natural depletion cases simulated in year one while invoking the pressure-sensitive fracture permeability option. To investigate sensitivity to in situ stress, two stress conditions were simulated for each primary variable. The water injection cases, begun in year one, were extended to include most of the reservoir parameters investigated for natural depletion, including fracture permeability as a function of net stress and the use of horizontal wells. The results thus far confirm that pressure-sensitive fractures degrade well performance and that the degradation is reduced by water injection pressure maintenance. Furthermore, oil recovery can be significantly increased by water injection pressure maintenance.

Not Available

1992-11-01T23:59:59.000Z

376

Simulation studies to evaluate the effect of fracture closure on the performance of fractured reservoirs; Final report  

SciTech Connect

A three-year research program to evaluate the effect of fracture closure on the recovery of oil and gas from naturally fractured reservoirs has been completed. The overall objectives of the study were to: (1) evaluate the reservoir conditions for which fracture closure is significant, and (2) evaluate innovative fluid injection techniques capable of maintaining pressure within the reservoir. The evaluations of reservoir performance were made by a modern dual porosity simulator, TETRAD. This simulator treats both porosity and permeability as functions of pore pressure. The Austin Chalk in the Pearsall Field in of South Texas was selected as the prototype fractured reservoir for this work. During the first year, simulations of vertical and horizontal well performance were made assuming that fracture permeability was insensitive to pressure change. Sensitivity runs indicated that the simulator was predicting the effects of critical reservoir parameters in a logical and consistent manner. The results confirmed that horizontal wells could increase both rate of oil recovery and total oil recovery from naturally fractured reservoirs. In the second year, the performance of the same vertical and horizontal wells was reevaluated with fracture permeability treated as a function of reservoir pressure. To investigate sensitivity to in situ stress, differing loading conditions were assumed. Simulated natural depletions confirm that pressure sensitive fractures degrade well performance. The severity of degradation worsens when the initial reservoir pressure approaches the average stress condition of the reservoir, such as occurs in over pressured reservoirs. Simulations with water injection indicate that degradation of permeability can be counteracted when reservoir pressure is maintained and oil recovery can be increased when reservoir properties are favorable.

Howrie, I.; Dauben, D.

1994-03-01T23:59:59.000Z

377

North American Climate in CMIP5 Experiments. Part II: Evaluation of Historical Simulations of Intra-Seasonal to Decadal Variability  

Science Conference Proceedings (OSTI)

This is the second part of a three-part paper on North American climate in CMIP5 that evaluates the 20th century simulations of intra-seasonal to multi-decadal variability and teleconnections with North American climate. Overall, the multi-model ...

Justin Sheffield; Baird Langenbrunner; Joyce E. Meyerson; J. David Neelin; Suzana J. Camargo; Rong Fu; Qu Hu; Xianan Jiang; Kristopher B. Karnauskas; Seo Tae Kim; Sanjiv Kumar; Jim Kinter; Eric D. Maloney; Annarita Mariotti; Zaitao Pan; Alfredo Ruiz-Barradas; Sumant Nigam; Richard Seager; Yolande L. Serra; De-Zheng Sun; Chunzai Wang; Jin-Yi Yu; Nathaniel Johnson; Shang-Ping Xie; Tao Zhang; Ming Zhao

378

Evaluation of Performance Traits in Brahman Cattle: Blood Parameters, Calf Temperament, Residual Feed Intake, and Bull Reproductive Development  

E-Print Network (OSTI)

The objectives of these studies were (1) evaluate the relationship between temperament, blood parameters, and performance in Brahman calves (n = 300); (2) evaluate the relationship between residual feed intake (RFI) and reproductive development in Brahman bulls (n = 41). Serum was collected at 24 h and d 21 to 24, and analyzed for total protein (TP) immunoglobulin G (IgG), and cortisol (CS). Calves were weighed at 24 h, weighed and evaluated for temperament using exit velocity (EV) at d 21 to 24, and at 28 d intervals thereafter. Beginning 28 d prior to weaning, and at 28 d intervals through 56 d post-weaning calves were evaluated for pen score (PS) used to calculate temperament score (TS = (EV+PS)/2). The average TS from 28 d prior to weaning and weaning was used to generate temperament groups; calves 1 SD below the mean being calm, those 1 SD above the mean being temperamental and all remaining classified as intermediate. Calf TS influenced WW (P = 0.04) and ADG from birth to weaning (P = 0.03). Serum TP at 24 h affected (P 0.05) by TS. Residual feed intake classification did not influence (P > 0.05) age at reproductive milestones. Ultrasound carcass traits were not affected by TS or RFI. Serum TP at 24 h was a viable indicator of future growth performance. Temperamental animals had lower growth rates in both studies. Reproductive development was not affected by RFI. BW at reproductive milestones was lower in temperamental bulls.

Matheney, Kara J.

2009-08-01T23:59:59.000Z

379

Evaluation of Performance and Emission Characteristics of Turmuric Leaves Based Fuel on 4 Stroke SI Engine  

Science Conference Proceedings (OSTI)

This paper describes an experimental study concerning the feasibility of using bio-oil namely turmeric leaves based oil obtained from the resin of turmeric plants. The emission and performance characteristics of a 4-stroke spark ignited engine were studied ... Keywords: turmeric leaves oil, biofuel, 4stroke engine

Sachin I. Meshram; M. S. Deshmukh

2010-11-01T23:59:59.000Z

380

Performance and numerical accuracy evaluation of heterogeneous multicore systems for Krylov orthogonal basis computation  

Science Conference Proceedings (OSTI)

We study the numerical behavior of heterogeneous systems such as CPU with GPU or IBM Cell processors for some orthogonalization processes. We focus on the influence of the different floating arithmetic handling of these accelerators with Gram-Schmidt ... Keywords: numerical algorithms for CS&E, parallel and distributed computing, performance analysis

Jérôme Dubois; Christophe Calvin; Serge Petiton

2010-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "ii performance evaluation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Solar-energy-system performance evaluation. San Anselmo School, San Jose, California, April 1981-March 1982  

DOE Green Energy (OSTI)

The San Anselmo School is a one-story brick elementary school building in San Jose, California. The active solar energy system is designed to supply 70% of the space heating and 72% of the cooling load. It is equipped with 3740 square feet of evacuated tube collectors, a 2175-gallon tank for heat storage, a solar-supplied absorption chiller, and four auxiliary gas-fired absorption chillers/heaters. The measured solar fraction of 19% is far below the expected values and is attributed to severe system control and HVAC problems. Other performance data given for the year include the solar savings ratio, conventional fuel savings, system performance factor, and solar system coefficient of performance. Also tabulated are monthly performance data for the overall solar energy system, collector subsystem, space heating and cooling subsystems. Typical hourly operation data for a day are tabulated, including hourly isolation, collector array temperatures (inlet and outlet), and storage fluid temperatures. The solar energy use and percentage of losses are also graphed. (LEW)

Pakkala, P.A.

1982-01-01T23:59:59.000Z

382

Evaluating the performance robustness of fixed and movable shading devices against diverse occupant behaviors  

Science Conference Proceedings (OSTI)

Given the diverse operating conditions, weather conditions, space users, and occupant preferences of buildings, it is commonplace to provide occupants with multiple means to adapt their immediate indoor environment. However, numerous studies have shown ... Keywords: building performance simulation, occupant behaviour, occupant comfort, robust building design, stochastic occupant modelling

William O'Brien

2013-04-01T23:59:59.000Z

383

Deferred incremental refresh of XML materialized views: algorithms and performance evaluation  

Science Conference Proceedings (OSTI)

The view mechanism can provide the user with an appropriate portion of database through data filtering and integration. Views are often materialized for query performance improvement, and in that case, their consistency needs to be maintained against ... Keywords: XML, deferred incremental view refresh, materialized view, semistructured data

Hyunchul Kang; Hosang Sung; ChanHo Moon

2003-01-01T23:59:59.000Z

384

Performance evaluations of ZigBee in different smart grid environments  

Science Conference Proceedings (OSTI)

Recently, ZigBee Smart Energy profile has been developed for various smart grid applications, such as automatic metering, demand response, load control, power fraud detection, fault diagnostics, and distribution automation. In this paper, the performance ... Keywords: IEEE 802.15.4, Ns-2, Smart grid, Wireless sensor networks, ZigBee

B. E. Bilgin; V. C. Gungor

2012-05-01T23:59:59.000Z

385

Performance Evaluation of the Hitachi SR8000 Using OpenMP Benchmarks  

Science Conference Proceedings (OSTI)

This paper reports the performance of a single node of the Hitachi SR8000 when using OpenMP benchmarks. Each processing node of the SR8000 is a shared-memory parallel computer composed of eight scalar processors with pseudo-vector processing feature. ...

Daisuke Takahashi; Mitsuhisa Sato; Taisuke Boku

2002-05-01T23:59:59.000Z

386

Performance evaluation of an improved harmony search algorithm for numerical optimization: Melody Search (MS)  

Science Conference Proceedings (OSTI)

Melody Search (MS) Algorithm as an innovative improved version of Harmony Search optimization method, with a novel Alternative Improvisation Procedure (AIP) is presented in this paper. MS algorithm mimics performance processes of the group improvisation ... Keywords: Alternative improvisation procedure, Harmony search, Melody Search algorithm, Numerical optimization, Stochastic search methods

S. M. Ashrafi; A. B. Dariane

2013-04-01T23:59:59.000Z

387

Performance evaluation of scheduling in IEEE 802.16 based wireless mesh networks  

Science Conference Proceedings (OSTI)

IEEE 802.16 employs TDMA (Time Division Multiple Access) as the access method and the policy for selecting scheduled links in a given time slot will definitely impact the system performance. We propose a collision-free centralized scheduling algorithm ... Keywords: IEEE 802.16, Link scheduling, Relay model, Wireless access networks, Wireless mesh networks

Bo Han; Weijia Jia; Lidong Lin

2007-02-01T23:59:59.000Z

388

Energy Efficiency and Performance Testing of Non-Road Electric Vehicles: Forklift Truck Evaluation — Status Report  

Science Conference Proceedings (OSTI)

Forklift trucks play an integral role in the industrial economy, and the majority of those trucks in service in the United States are electric. The benefits of such non-road electric vehicles include lower life cycle costs, improved worker health and safety, and reduced maintenance. However, large numbers of electric lift trucks can become a concern to the electric utility industry if the vehicles are inefficient or cause power quality problems. Southern California Edison (SCE) has evaluated the energy e...

2003-12-31T23:59:59.000Z

389

Walla Walla River Basin Fish Screen Evaluations; Nursery Bridge Fishway, Garden City/Lowden II, and Little Walla Walla Sites, 2004 Annual Report.  

DOE Green Energy (OSTI)

Pacific Northwest National Laboratory evaluated the fish screens at the Nursery Bridge Fishway, the Garden City/Lowden II site west of Walla Walla, Washington, and the Little Walla Walla site in Milton-Freewater, Oregon, in the Walla Walla River Basin during 2004. The fish-screen facilities were examined to determine if they were being effectively operated and maintained to provide for safe fish passage. At the Nursery Bridge Fishway, the screens were evaluated specifically to determine whether the louvers that aid in controlling water flow from behind the screens could be adjusted so that the screens would meet fish-protection criteria. Data were collected to determine whether velocities in front of the screens met current National Oceanic and Atmospheric Administration's National Marine Fisheries Service (NOAA Fisheries) (formerly NMFS) criteria to promote safe and timely fish passage before and after changing the louver settings. The Little Walla Walla screens were evaluated to determine how a build-up of algae on the screens affected water velocities.

Vucelick, J.; McMichael, G.

2004-11-01T23:59:59.000Z

390

MS, II-J  

Office of Legacy Management (LM)

I' ; ,' I' ; ,' Departm&th of Energy 1 MS, II-J Washington. DC 20585 ' . I I The Honorable John Gallagher ,)fl', /',' ' 103 E. Michigan Avenue .i., ,.' Battle Creek, Michigan 49016 _. Dear Mayor Gallagheri d,---, " '/ approachto openness i.n: with the: public. In (FUSRAP)i.is responsible agencies, determining ~author~ity, performing remedial action to cleanup sites to meet current radiological protection requirements.. A conservative set of technical evaluation guidelines is used in these investigations to assure protection of public health,,~safety and then environment. Where.DQE does not,have .authority for proceeding; the available site information is forwarded to the appropriate Federal or State Agency. DOE studied the historical records of the former Oliver Corp. site, and it

391

GREENHOUSE GAS EMISSIONS CONTROL BY OXYGEN FIRING IN CIRCULATING FLUIDIZED BED BOILERS: PHASE II--PILOT SCALE TESTING AND UPDATED PERFORMANCE AND ECONOMICS FOR OXYGEN FIRED CFB WITH CO2 CAPTURE  

SciTech Connect

Because fossil fuel fired power plants are among the largest and most concentrated producers of CO{sub 2} emissions, recovery and sequestration of CO{sub 2} from the flue gas of such plants has been identified as one of the primary means for reducing anthropogenic CO{sub 2} emissions. In this Phase II study, ALSTOM Power Inc. (ALSTOM) has investigated one promising near-term coal fired power plant configuration designed to capture CO{sub 2} from effluent gas streams for sequestration. Burning fossil fuels in mixtures of oxygen and recirculated flue gas (made principally of CO{sub 2}) essentially eliminates the presence of atmospheric nitrogen in the flue gas. The resulting flue gas is comprised primarily of CO{sub 2}, along with some moisture, nitrogen, oxygen, and trace gases like SO{sub 2} and NO{sub x}. Oxygen firing in utility scale Pulverized Coal (PC) fired boilers has been shown to be a more economical method for CO{sub 2} capture than amine scrubbing (Bozzuto, et al., 2001). Additionally, oxygen firing in Circulating Fluid Bed Boilers (CFB's) can be more economical than in PC or Stoker firing, because recirculated gas flow can be reduced significantly. Oxygen-fired PC and Stoker units require large quantities of recirculated flue gas to maintain acceptable furnace temperatures. Oxygen-fired CFB units, on the other hand, can accomplish this by additional cooling of recirculated solids. The reduced recirculated gas flow with CFB plants results in significant Boiler Island cost savings resulting from reduced component The overall objective of the Phase II workscope, which is the subject of this report, is to generate a refined technical and economic evaluation of the Oxygen fired CFB case (Case-2 from Phase I) utilizing the information learned from pilot-scale testing of this concept. The objective of the pilot-scale testing was to generate detailed technical data needed to establish advanced CFB design requirements and performance when firing coals and delayed petroleum coke in O{sub 2}/CO{sub 2} mixtures. Firing rates in the pilot test facility ranged from 2.2 to 7.9 MM-Btu/hr. Pilot-scale testing was performed at ALSTOM's Multi-use Test Facility (MTF), located in Windsor, Connecticut.

Nsakala ya Nsakala; Gregory N. Liljedahl; David G. Turek

2004-10-27T23:59:59.000Z

392

GREENHOUSE GAS EMISSIONS CONTROL BY OXYGEN FIRING IN CIRCULATING FLUIDIZED BED BOILERS: PHASE II--PILOT SCALE TESTING AND UPDATED PERFORMANCE AND ECONOMICS FOR OXYGEN FIRED CFB WITH CO2 CAPTURE  

SciTech Connect

Because fossil fuel fired power plants are among the largest and most concentrated producers of CO{sub 2} emissions, recovery and sequestration of CO{sub 2} from the flue gas of such plants has been identified as one of the primary means for reducing anthropogenic CO{sub 2} emissions. In this Phase II study, ALSTOM Power Inc. (ALSTOM) has investigated one promising near-term coal fired power plant configuration designed to capture CO{sub 2} from effluent gas streams for sequestration. Burning fossil fuels in mixtures of oxygen and recirculated flue gas (made principally of CO{sub 2}) essentially eliminates the presence of atmospheric nitrogen in the flue gas. The resulting flue gas is comprised primarily of CO{sub 2}, along with some moisture, nitrogen, oxygen, and trace gases like SO{sub 2} and NO{sub x}. Oxygen firing in utility scale Pulverized Coal (PC) fired boilers has been shown to be a more economical method for CO{sub 2} capture than amine scrubbing (Bozzuto, et al., 2001). Additionally, oxygen firing in Circulating Fluid Bed Boilers (CFB's) can be more economical than in PC or Stoker firing, because recirculated gas flow can be reduced significantly. Oxygen-fired PC and Stoker units require large quantities of recirculated flue gas to maintain acceptable furnace temperatures. Oxygen-fired CFB units, on the other hand, can accomplish this by additional cooling of recirculated solids. The reduced recirculated gas flow with CFB plants results in significant Boiler Island cost savings resulting from reduced component The overall objective of the Phase II workscope, which is the subject of this report, is to generate a refined technical and economic evaluation of the Oxygen fired CFB case (Case-2 from Phase I) utilizing the information learned from pilot-scale testing of this concept. The objective of the pilot-scale testing was to generate detailed technical data needed to establish advanced CFB design requirements and performance when firing coals and delayed petroleum coke in O{sub 2}/CO{sub 2} mixtures. Firing rates in the pilot test facility ranged from 2.2 to 7.9 MM-Btu/hr. Pilot-scale testing was performed at ALSTOM's Multi-use Test Facility (MTF), located in Windsor, Connecticut.

Nsakala ya Nsakala; Gregory N. Liljedahl; David G. Turek

2004-10-27T23:59:59.000Z

393

Solar-energy-system performance evaluation. Scottsdale Courthouse, Scottsdale, Arizona. March, April, July, August, and October 1981 through February 1982  

DOE Green Energy (OSTI)

The site is the County Courts Building in Scottsdale, Arizona. Its active solar energy system is designed to supply 100% of the heating and 60% of the cooling load. The system consists of 2723 square feet of concentrating collectors, 5000 gallons of hot water storage, 25.5-ton absorption chiller, and backup electric resistance heating and a 25-ton electric reciprocating vapor-compressor chiller. The system performed far below design expectations due to the extremely poor performance of the collector array. Performance data given include the solar fraction, solar savings ratio, conventional fuel savings, and coefficient of performance. Monthly performance data are tabulated for the solar system and for each subsystem. Also given are monthly solar operating energy, energy savings, and weather conditions for each month. Typical system operation data are graphed and a typical operating sequence is given. Among the appendices are a brief system description, the performance evaluation techniques, typical monthly data, long-term weather data, and a brief discussion of sensor technology. (LEW)

Wetzel, P.E.

1982-01-01T23:59:59.000Z

394

Solar Energy System Performance Evaluation: May-August 1978. Florida Gas Company, Single Family Residence, Winter Springs, Florida  

DOE Green Energy (OSTI)

A brief description of the system, which provides thermal energy for space heating, space cooling and domestic hot water heating for a one story single family dwelling, is given. A performance evaluation of the cooling subsystem is presented for the period May through August, 1978. A comparison of measured climatic data with long term average conditions for the vicinity is made. Subsystem performance, including collector array, storage, and space cooling systems, is discussed and design modifications that would improve the system's overall economic performance are considered. Space cooling is provided by an Arkla Model WF-35, 3-ton absorption cycle chiller. A comparison of the present system configuration with a vapor compression air conditioner is presented showing that net savings are realized when the present system is operated solely with solar supplied energy.

Lee, T.D.; McCumber, W.H.; Murphy, L.J.

1978-01-01T23:59:59.000Z

395

DOE ETV-1 electric test vehicle. Phase III: performance testing and system evaluation. Final report  

DOE Green Energy (OSTI)

The DOE ETV-1 represents the most advanced electric vehicle in operation today. Engineering tests have been conducted by the Jet Propulsion Laboratory in order to characterize its overall system performance and component efficiencies within the system environment. A dynamometer was used in order to minimize the ambient effects and large uncertainties present in track testing. Extensive test requirements have been defined and procedures were carefully controlled in order to maintain a high degree of credibility. Limited track testing was performed in order to corroborate the dynamometer results. Test results include an energy flow analysis through the major subsystems and incorporate and aerodynamic and rolling losses under cyclic and various steady speed conditions. A complete summary of the major output from all relevant dynamometer and track tests is also included as an appendix.

Kurtz, D. W.

1981-12-01T23:59:59.000Z

396

Nondestructive Evaluation: Good Practices to Optimize Human Performance During In-Service Inspection  

Science Conference Proceedings (OSTI)

Throughout time, people have made miscalculations, mistakes, oversights, or slips; thus, human error has been with us from the beginning. All humans make errors. Studies have shown that, on average, a person makes five errors every hour. Industrial human errors can significantly impact the productivity and cost-effectiveness of any facility or company and at times result in loss of life. In many instances, human performance problems that lead directly to errors, incidents, and accidents are driven by und...

2009-11-30T23:59:59.000Z

397

Fuel Design Evaluation Handbook: Tools for Assessing Fuel and Core Component Performance  

Science Conference Proceedings (OSTI)

The overall objective of this report is to provide a set of concise technical performance considerations for nuclear fuel and core components that, if effectively addressed, will reduce the number of fuel and core component related operational issues, increase fuel reliability to achieve and sustain operation with zero defects, and allow increases in fuel burnup to be achieved in future designs with improved margins to thermal and mechanical limits. The technical considerations and recommendations in thi...

2011-01-31T23:59:59.000Z

398

Laboratory Evaluation of the Effects of Potassium Acetate Deicing Chemicals on the Performance of Concrete  

Science Conference Proceedings (OSTI)

Recent evidence suggests that the most commonly used salt for snow and ice control on airfield pavements, potassium acetate (KAc), may adversely impact long-term durability of concrete. This report provides interim findings from a study on effects of potassium acetate on performance of concrete. The main objectives of this program are as follows: Determine whether potassium acetate solution exacerbates alkali-silica reaction (ASR) under field conditions and in the laboratory under simulated field and ac...

2010-12-09T23:59:59.000Z

399

DOP Test Evaluation of the Ballistic Performance of Armor Ceramics against Long Rod Penetration  

SciTech Connect

A series of DOP tests with lateral confinement have been carried out and a linear relation between the residual penetration in RHA and the alumina thickness has been obtained. The rod configuration and the initial transient impact are the two factors that cause the gradual decrease of the differential efficiency factor (DEF) when the ceramic thickness is increased in literature. A new improved DEF definition is proposed to characterize the thick tile ceramic ballistic performance based on a more physical analysis.

Huang Fenglei; Zhang Liansheng [State Key Laboratory of Explosion Science, Beijing Institute of Technology, Beijing 100081 (China)

2006-07-28T23:59:59.000Z

400

Performance Evaluation of Behavioral Deterrents for Reducing Impingement at Cooling Water Intakes  

Science Conference Proceedings (OSTI)

This report presents results of an examination into the effectiveness of behavioral fish deterrents (light and sound) for reducing impingement of freshwater fish at a cooling water intake structure (CWIS) located at an Alabama Power Company (APC) power plant. This research project also was supported and performed by APC. Research results advance our understanding of the effectiveness of strobe lights and sound as a fish protection technology for meeting Clean Water Act §316(b) requirements.

2008-11-10T23:59:59.000Z

Note: This page contains sample records for the topic "ii performance evaluation" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Evaluation of surface sampling method performance for Bacillus Spores on clean and dirty outdoor surfaces.  

Science Conference Proceedings (OSTI)

Recovery of Bacillus atrophaeous spores from grime-treated and clean surfaces was measured in a controlled chamber study to assess sampling method performance. Outdoor surfaces investigated by wipe and vacuum sampling methods included stainless steel, glass, marble and concrete. Bacillus atrophaeous spores were used as a surrogate for Bacillus anthracis spores in this study designed to assess whether grime-coated surfaces significantly affected surface sampling method performance when compared to clean surfaces. A series of chamber tests were carried out in which known amounts of spores were allowed to gravitationally settle onto both clean and dirty surfaces. Reference coupons were co-located with test coupons in all chamber experiments to provide a quantitative measure of initial surface concentrations of spores on all surfaces, thereby allowing sampling recovery calculations. Results from these tests, carried out under both low and high humidity conditions, show that spore recovery from grime-coated surfaces is the same as or better than spore recovery from clean surfaces. Statistically significant differences between method performance for grime-coated and clean surfaces were observed in only about half of the chamber tests conducted.

Wilson, Mollye C.; Einfeld, Wayne; Boucher, Raymond M.; Brown, Gary Stephen; Tezak, Matthew Stephen

2011-06-01T23:59:59.000Z

402

Performance Evaluation of O-Ring Seals in Model 9975 Packaging Assemblies (U)  

SciTech Connect

The Materials Consultation Group of SRTC has completed a review of existing literature and data regarding the useable service life of Viton{reg_sign} GLT fluoroelastomer O-rings currently used in the Model 9975 packaging assemblies. Although the shipping and transportation period is normally limited to 2 years, it is anticipated that these packages will be used for longer-term storage of Pu-bearing materials in KAMS (K-Area Materials Storage) prior to processing or disposition in the APSF (Actinide Packaging and Storage Facility). Based on the service conditions and review of available literature, Materials Consultation concludes that there is sufficient existing data to establish the technical basis for storage of Pu-bearing materials using Parker Seals O-ring compound V835-75 (or equivalent) for up to 10 years following the 2-year shipping period. Although significant physical deterioration of the O-rings and release of product is not expected, definite changes in physical properties will occur. However, due to the complex relationship between elastomer formulation, seal properties, and competing degradation mechanisms, the actual degree of property variation and impact upon seal performance is difficult to predict. Therefore, accelerated aging and/or surveillance programs are recommended to validate the assumptions outlined in this report and to assess the long-term performance of O-ring seals under actual service conditions. Such programs could provide a unique opportunity to develop nonexistent long-term performance data, as well as address storage extension issues if necessary.

Skidmore, Eric

1998-12-28T23:59:59.000Z

403

Evaluation of PV performance models and their impact on project risk.  

SciTech Connect

Photovoltaic systems are often priced in $/W{sub p}, where Wp refers to the DC power rating of the modules at Standard Test Conditions (1000 W/m{sup 2}, 25 C cell temperature) and $ refers to the installed cost of the system. However, the true value of the system is in the energy it will produce in kWhs, not the power rating. System energy production is a function of the system design and location, the mounting configuration, the power conversion system, and the module technology, as well as the solar resource. Even if all other variables are held constant, the annual energy yield (kWh/kW{sup p}) will vary among module technologies because of differences in response to low-light levels and temperature. Understanding energy yield is a key part of understanding system value. System performance models are used during project development to estimate the expected output of PV systems for a given design and location. Performance modeling is normally done by the system designer/system integrator. Often, an independent engineer will also model system output during a due diligence review of a project. A variety of system performance models are available. The most commonly used modeling tool for project development and due diligence in the United States is probably PVsyst, while those seeking a quick answer to expected energy production may use PVWatts. In this paper, we examine the variation in predicted energy output among modeling tools and users and compare that to measured output.

Stein, Joshua S.; Hansen, Clifford W.; Cameron, Christopher P.

2010-12-01T23:59:59.000Z

404

Advanced Technology Development Program for Lithium-Ion Batteries: Gen 2 Performance Evaluation Final Report  

Science Conference Proceedings (OSTI)

The Advanced Technology Development Program has completed performance testing of the second generation of lithium-ion cells (i.e., Gen 2 cells). The 18650-size Gen 2 cells, with a baseline and variant chemistry, were distributed over a matrix consisting of three states-of-charge (SOCs) (60, 80, and 100% SOC), four temperatures (25, 35, 45, and 55°C), and three life tests (calendar-, cycle-, and accelerated-life). The calendar- and accelerated-life cells were clamped at an open-circuit voltage corresponding to the designated SOC and were subjected to a once-per-day pulse profile. The cycle-life cells were continuously pulsed using a profile that was centered around 60% SOC. Life testing was interrupted every four weeks for reference performance tests (RPTs), which were used to quantify changes in cell degradation as a function of aging. The RPTs generally consisted of C1/1 and C1/25 static capacity tests, a low-current hybrid pulse power characterization test, and electrochemical impedance spectroscopy. The rate of cell degradation generally increased with increasing test temperature, and SOC. It was also usually slowest for the calendar-life cells and fastest for the accelerated-life cells. Detailed capacity-, power-, and impedance-based performance results are reported.

Jon P. Christophersen; Ira Bloom; Edward V. Thomas; Kevin L. Gering; Gary L. Henriksen; Vincent S. Battaglia; David Howell

2006-07-01T23:59:59.000Z

405

Scaled Testing to Evaluate Pulse Jet Mixer Performance in Waste Treatment Plant Mixing Vessels  

Science Conference Proceedings (OSTI)

The Waste Treatment and Immobilization Plant (WTP) at Hanford is being designed and built to pre-treat and vitrify the waste in Hanford’s 177 underground waste storage tanks. Numerous process vessels will hold waste at various stages in the WTP. These vessels have pulse jet mixer (PJM) systems. A test program was developed to evaluate the adequacy of mixing system designs in the solids-containing vessels in the WTP. The program focused mainly on non-cohesive solids behavior. Specifically, the program addressed the effectiveness of the mixing systems to suspend settled solids off the vessel bottom, and distribute the solids vertically. Experiments were conducted at three scales using various particulate simulants. A range of solids loadings and operational parameters were evaluated, including jet velocity, pulse volume, and duty cycle. In place of actual PJMs, the tests used direct injection from tubes with suction at the top of the tank fluid. This gave better control over the discharge duration and duty cycle and simplified the facility requirements. The mixing system configurations represented in testing varied from 4 to 12 PJMs with various jet nozzle sizes. In this way the results collected could be applied to the broad range of WTP vessels with varying geometrical configurations and planned operating conditions. Data for “just-suspended velocity”, solids cloud height, and solids concentration vertical profile were collected, analyzed, and correlated. The correlations were successfully benchmarked against previous large-scale test results, then applied to the WTP vessels using reasonable assumptions of anticipated waste properties to evaluate adequacy of the existing mixing system designs.

Fort, James A.; Meyer, Perry A.; Bamberger, Judith A.; Enderlin, Carl W.; Scott, Paul A.; Minette, Michael J.; Gauglitz, Phillip A.

2010-03-07T23:59:59.000Z

406

Evaluation of the Role of Water in the H2 Bond Formation by Ni(II)-based Electrocatalysts  

SciTech Connect

We investigate the role of water in the H-H bond formation by a family of nickel molecular catalysts that exhibit high rates for H2 production in acetonitrile solvent. A key feature leading to the high reactivity is the Lewis acidity of the Ni(II) center and pendant amines in the diphosphine ligand that function as Lewis bases, facilitating H-H bond formation or cleavage. Significant increases in the rate of H2 production have been reported in the presence of added water. Our calculations show that molecular water can displace an acetonitrile solvent molecule in the first solvation shell of the metal. One or two water molecules can also participate in shuttling a proton that can combine with a metal hydride to form the H-H bond. However the participation of the water molecules does not lower the barrier to H-H bond formation. Thus these calculations suggest that the rate increase due to water in these electrocatalysts is not associated with the elementary step of H-H bond formation or cleavage, but rather with the proton delivery steps. We attribute the higher barrier in the H-H bond formation in the presence of water to a decrease in direct interaction between the protic and hydridic hydrogen atoms forced by the water molecules. This research was supported as part of the Center for Molecular Electrocatalysis, an Energy Frontier Research Center funded by the US Department of Energy, Office of Science, Office of Basic Energy Sciences. Computational resources were provided at W. R. Wiley Environmental Molecular Science Laboratory - Pacific Northwest National Laboratory, the National Energy Research Scientific Computing Center (NERSC) at Lawrence Berkeley National Laboratory, and the Jaguar supercomputer at Oak Ridge National Laboratory.

Ho, Ming-Hsun; Raugei, Simone; Rousseau, Roger J.; Dupuis, Michel; Bullock, R. Morris

2013-07-17T23:59:59.000Z

407

Developing an inventor support service which performs early stage market and manufacturing evaluations. [Final Report  

SciTech Connect

American businesses are learning the difficult high cost lesson of ignoring production and market factors (producibility, unit product cost (UPC), marketability, etc) during the engineering design phase of product development. Studies have shown that the Japanese spend three times as long as Americans in the design feasibility and decision process of new product introductions and one third the amount of time in the implementation of those products. There is a 20 to 1 cost benefit on effort applied in the design phase versus the production phase of the product life cycle. The number one goal of this project was to establish an organization that has, as one of its purposes, the providing of services responsive to the needs of independent inventors. The number two goal was to demonstrate the value of providing marketing and manufacturing counsel at an early stage in the product development process. The first study goal was met by providing the materials and information necessary to establish an evaluation team and an organization to handle such evaluations. The second study goal was met by demonstrating the impact of early market analysis and manufacturing considerations on product design and therefore on the description of the invention for four different inventions. These inventions were selected at various stages of development. Regardless of stage of development, the marketing and manufacturing reviews resulted in significant changes in design and/or market positioning.

Not Available

1991-10-01T23:59:59.000Z

408

PARS II User Guide  

Energy.gov (U.S. Department of Energy (DOE))

This document serves as a reference manual to assist DOE end-users in performing their respective functions within the PARS II web application. The document provides a description and “How To” for...

409

Evaluating the energy performance of the first generation of LEED-certified commercial buildings  

Science Conference Proceedings (OSTI)

Over three hundred buildings have been certified under the Leadership in Energy and Environmental Design (LEED) rating system for sustainable commercial buildings as of January 2006. This paper explores the modeled and actual energy performance of a sample of 21 of these buildings that certified under LEED between December 2001 and August 2005, including how extensively the design teams pursued LEED energy-efficiency credits, the modeled design and baseline energy performance, and the actual energy use during the first few years of operation. We collected utility billing data from 2003-2005 and compared the billed energy consumption with the modeled energy use. We also calculated Energy Star ratings for the buildings and compared them to peer groups where possible. The mean savings modeled for the sample was 27% compared to their modeled baseline values. For the group of 18 buildings for which we have both modeled and billed energy use, the mean value for actual consumption was 1% lower than modeled energy use, with a wide variation around the mean. The mean Energy Star score was 71 out of a total of 100 points, higher than the average score of 50 but slightly below the Energy Star award threshold of 75 points. The paper discusses the limitations inherent to this type of analysis, such as the small sample size of disparate buildings, the uncertainties in actual floor area, and the discrepancies between metered sections of the buildings. Despite these limitations, the value of the work is that it presents an early view of the actual energy performance for a set of 21 LEED-certified buildings.

Diamond, Rick; Opitz, Mike; Hicks, Tom; Von Neida, Bill; Herrera, Shawn

2006-05-01T23:59:59.000Z

410

Case studies of thermal energy storage (TES) systems: Evaluation and verification of system performance  

DOE Green Energy (OSTI)

We have developed two case studies to review and analyze energy performance of thermal energy storage CMS systems in commercial buildings. Our case studies considered two partial ice storage systems in Northern California. For each case, we compiled historical data on TES design, installation, and operation. This information was further enhanced by data obtained through interviews with the building owners and operators. The performance and historical data of the TES systems and their components were grouped into issues related to design, installation, operation, and maintenance of the systems. Our analysis indicated that (1) almost all problems related to the operation of TES and non-TES systems could be traced back to the design of the system, and (2) the identified problems were not unique to the TES systems. There were as many original problems with conventional'' HVAC systems and components as with TES systems. Judging from the problems related to non-TES components identified in these two case studies, it is reasonable to conclude that conventional systems have as many problems as TES systems, but a failure, in a TES system may have a more dramatic impact on thermal comfort and electricity charges. The objective of the designers of the TES systems in the case-study buildings was to design just-the-right-size systems so that both the initial investment and operating costs would be minimized. Given such criteria, a system is typically designed only for normal and steady-state operating conditions-which often precludes due consideration to factors such as maintenance, growth in the needed capacity, ease of the operation, and modularity of the systems. Therefore, it is not surprising to find that these systems, at least initially, did not perform to the design intent and expectation and that they had to go through extended periods of trouble-shooting.

Akbari, H.; Sezgen, O.

1992-01-01T23:59:59.000Z

411

Case studies of thermal energy storage (TES) systems: Evaluation and verification of system performance. Final report  

Science Conference Proceedings (OSTI)

We have developed two case studies to review and analyze energy performance of thermal energy storage CMS systems in commercial buildings. Our case studies considered two partial ice storage systems in Northern California. For each case, we compiled historical data on TES design, installation, and operation. This information was further enhanced by data obtained through interviews with the building owners and operators. The performance and historical data of the TES systems and their components were grouped into issues related to design, installation, operation, and maintenance of the systems. Our analysis indicated that (1) almost all problems related to the operation of TES and non-TES systems could be traced back to the design of the system, and (2) the identified problems were not unique to the TES systems. There were as many original problems with ``conventional`` HVAC systems and components as with TES systems. Judging from the problems related to non-TES components identified in these two case studies, it is reasonable to conclude that conventional systems have as many problems as TES systems, but a failure, in a TES system may have a more dramatic impact on thermal comfort and electricity charges. The objective of the designers of the TES systems in the case-study buildings was to design just-the-right-size systems so that both the initial investment and operating costs would be minimized. Given such criteria, a system is typically designed only for normal and steady-state operating conditions-which often precludes due consideration to factors such as maintenance, growth in the needed capacity, ease of the operation, and modularity of the systems. Therefore, it is not surprising to find that these systems, at least initially, did not perform to the design intent and expectation and that they had to go through extended periods of trouble-shooting.

Akbari, H.; Sezgen, O.

1992-01-01T23:59:59.000Z

412

SHADE: a computer model for evaluating the optical performance of two-axis tracking parabolic concentrators  

DOE Green Energy (OSTI)

A computer model SHADE (Selection of Heliostat Arrangement for Distributed Engines) has been developed at the Pacific Northwest Laboratory to aid in determining the optical performance of two-axis tracking parabolic concentrators. The shading of individual mirror assemblies in a field of parabolic dishes determines the optimal field arrangement and the most efficient method of plant operation. SHADE provides a simple and inexpensive analytical tool for examining certain design aspects of solar thermal power systems using a network of point-focusing parabolic concentrators.

Apley, W. J.

1979-05-01T23:59:59.000Z

413

Solar energy system performance evaluation. Seasonal report for SEMCO, Loxahatchee, Florida  

DOE Green Energy (OSTI)

The analysis used is based on instrumented system data monitored and collected for at least one full season of operation. The objective of the analysis is to report the long-term field performance of the installed system and to make technical contributions to the definition of techniques and requirements for solar energy system design. The solar energy system was designed to supply domestic hot water for a family of four, single-family residence. The SEMCO System 80 consists of two liquid flat plate collectors, single tank, pump, controls, and transport lines.

Not Available

1980-01-01T23:59:59.000Z

414

Solar energy system performance evaluation. Seasonal report for SEMCO, Macon, Georgia  

DOE Green Energy (OSTI)

The analysis used is based on instrumented system data monitored and collected for at least one full season of operation. The objective of the analysis is to report the long-term field performance of the installed system and to make technical contributions to the definition of techniques and requirements for solar energy system design. The solar energy system was designed to supply domestic hot water for a family of four, single-family residence. The SEMCO System 80 consists of liquid (silicone) flat plate collectors, single tank, pump, controls and transport lines.

Not Available

1980-01-01T23:59:59.000Z

415

Evaluating Financial Model Performance: An Empirical Analysis of Some North Sea Investments  

E-Print Network (OSTI)

Fifty North Sea oil & gas investment transactions were analysed using traditional spreadsheet based financial modelling methods. The purpose of the analysis was to determine if there was a statistically significant relationship between the price paid for an oil & gas asset and the actual or expected financial return over the asset's economically useful life. Several interesting and statistically significant relationships were found which reveal useful information about financial modelling performance, the premia paid to acquire North Sea assets, the contribution oil and gas price uncertainty has on estimates of future financial returns and the median financial return of these North Sea Investments.

Croll, Grenville J; Lawal, Ola

2010-01-01T23:59:59.000Z

416

Performance measures for evaluating public participation activities in DOE`s Office of Environmental Management  

Science Conference Proceedings (OSTI)

Public participation in decision-making in the United States has become a dominant theme throughout the public sector and is increasingly used in the private sector. Recent reports by the National Research Council and the Commission on Risk Assessment and Risk Management, set up jointly by the White House and Congress, conclude that risk decisions must increasingly be structured in such a manner as to involve stakeholders meaningfully in the processes and activities leading to decisions and, perhaps, through decision implementation. Both of these reports indicate that decisions may take longer but be better if officials: (1) bring all interested and affected parties to the table at the beginning of the risk-discussion process; (2) identify relevant concerns, losses, exposures and other information the parties have; (3) address significant concerns through appropriate research; and (4) present findings in an understandable, accessible way. This report is intended to facilitate subsequent evaluations of public participation activities and programs.

Carnes, S.A.; Schweitzer, M.; Peelle, E.B.; Wolfe, A.K.; Munro, J.F.

1996-08-01T23:59:59.000Z

417

Evaluating the Performance and Economics of Transpired Solar Collectors for Commercial Applications: Preprint  

DOE Green Energy (OSTI)

Using transpired solar collectors to preheat ventilation air has recently become recognized as an economic alternative for integrating renewable energy into commercial buildings in heating climates. The collectors have relatively low installed costs and operate on simple principles. Theory and performance testing have shown that solar collection efficiency can exceed 70% of incident solar. However, implementation and current absorber designs have adversely affected the efficiency and associated economics from this initial analysis. The National Renewable Energy Laboratory has actively studied this technology and monitored performance at several installations. A calibrated model that uses typical meteorological weather data to determine absorber plate efficiency resulted from this work. With this model, an economic analysis across heating climates was done to show the effects of collector size, tilt, azimuth, and absorptivity. The analysis relates the internal rate of return of a system based on the cost of the installed absorber area. In general, colder and higher latitude climates return a higher rate of return because the heating season extends into months with good solar resource.

Kozubal, E.; Deru, M.; Slayzak, S.; Norton, P.; Barker, G.; McClendon, J,

2008-07-01T23:59:59.000Z

418

Green Building Performance Evaluation in the United States: Measured Results from LEED- New Construction Buildings  

E-Print Network (OSTI)

Is the Leadership in Energy and Environmental Design program (LEED) delivering actual energy savings? This study addresses that question with a post-occupancy assessment of 121 LEED buildings across the United State. Input to the study consisted of energy bills and brief descriptions of actual building use from owners, plus modeled energy usage information from the U.S. Green Buildings Council‘s (USGBC) LEED submittal files. The actual building performance was viewed through several whole-building metrics: energy use intensity (EUI) relative to national averages, Energy Star ratings, and energy use levels relative to the initial energy modeling (covered in more detail in Frankel, 2008). Two overall results emerged. First, across each of these varied measurements, LEED building performance averaged 25 – 30% better than the benchmark. However, there is also wide variation within the individual results, even for similar building activities and climate zones, suggesting potential for significant further improvements. This paper presents general EUI patterns, Energy Star ratings, and their relationship to LEED energy credits. The discussion also covers the study process and current challenges to such efforts.

Hewitt, D.; Turner, C.; Frankel, M.

2008-10-01T23:59:59.000Z

419

Evaluation of Vegetative Roofs' Performance on Energy Consumption in Hot and Humid Climates  

E-Print Network (OSTI)

Green roofs have been widely used in Europe proved to be beneficial. However, in the US they are not widespread. Previous studies have concluded that the main obstacle that makes architects, developers, etc. reluctant to introduce vegetative roofs is their preference for the traditional roofing since it is a tried-and-true technology. A positive feedback on the performance of vegetative roofs will encourage developers and possibly government authorities to invest more in them. Therefore, a survey was conducted to determine the performance of green roofs in existing buildings in hot and humid climates. This paper presents the results of this survey of around 40 buildings. The methodology and pertinent questions are also presented. Due to the many parameters involved in determining the rate of energy consumption in a building, a definite conclusion regarding how much exactly they can effect on saving can not be drawn, however, the results showed that green roofs can result in saving in the annual energy consumption and using shrubs as well as increasing soil thickness were found to be most effective in reducing building energy consumption.

Anderson, J.; Azarbayjani, M.

2008-12-01T23:59:59.000Z

420

Solar energy system performance evaluation - final report for Honeywell OTS 45, Salt River Project, Phoenix, Arizona  

DOE Green Energy (OSTI)

This report describes the operation and technical performance of the Solar Operational Test Site (OTS 45) at Salt River Project in Phoenix, Arizona, based on the analysis of data collected between April 1981 and March 31, 1982. The following topics are discussed: system description, performance assessment, operating energy, energy savings, system maintenance, and conclusions. The solar energy system at OTS 45 is a hydronic heating and cooling system consisting of 8208 square feet of liquid-cooled flat-plate collectors; a 2500-gallon thermal storage tank; two 25-ton capacity organic Rankine-cycle-engine-assisted water chillers; a forced-draft cooling tower; and associated piping, pumps, valves, controls and heat rejection equipment. The solar system has eight basic modes of operation and several combination modes. The system operation is controlled automatically by a Honeywell-designed microprocessor-based control system, which also provides diagnostics. Based on the instrumented test data monitored and collected during the 8 months of the Operational Test Period, the solar system collected 1143 MMBtu of thermal energy of the total incident solar energy of 3440 MMBtu and provided 241 MMBtu for cooling and 64 MMBtu for heating. The projected net annual electrical energy savings due to the solar system was approximately 40,000 kWh(e).

Mathur, A K

1983-09-01T23:59:59.000Z

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421

Performance and economic evaluation of the seahorse natural gas hot water heater conversion at Fort Stewart. Final report  

SciTech Connect

The Federal government is the largest single energy consumer in the United States with consumption of nearly 1.5 quads/year of energy (10{sup 15} quad = 1015 Btu) and cost valued at nearly $10 billion annually. The US Department of Energy`s (DOE) Federal Energy Management Program (FEMP) supports efforts to reduce energy use and associated expenses in the Federal sector. One such effort, the New Technology Demonstration Program (NTDP) seeks to evaluate new energy -- saving US technologies and secure their more timely adoption by the US government. Pacific Northwest Laboratory (PNL) is one of four DOE laboratories that participate in the New Technologies Demonstration Program, providing technical expertise and equipment to evaluate new, energy-saving technologies being studied under that program. This report provides the results of a field evaluation that PNL conducted for DOE/FEMP with funding support from the US Department of Defense (DoD) Strategic Environmental Research and Development Program (SERDP) to examine the performance of 4 candidate energy-saving technology-a water heater conversion system to convert electrically powered water heaters to natural gas fuel. The unit was installed at a single residence at Fort Stewart, a US Army base in Georgia, and the performance was monitored under the NTDP. Participating in this effort under a Cooperative Research and Development Agreement (CRADA) were Gas Fired Products, developers of the technology; the Public Service Company of North Carolina; Atlanta Gas Light Company; the Army Corps of Engineers; Fort Stewart; and Pacific Northwest Laboratory.

Winiarski, D.W.

1995-12-01T23:59:59.000Z

422

Performance and economic evaluation of the seahorse natural gas hot water heater conversion at Fort Stewart. Interim report, 1994 Summer  

Science Conference Proceedings (OSTI)

The federal government is the largest single energy consumer in the United States cost valued at nearly $10 billion annually. The US Department of Energy`s (DOE) Federal Energy Management Program (FEMP) supports efforts to reduce energy use and associated expenses in the federal sector. One such effort, the New Technology Demonstration Program (NTDP), seeks to evaluate new energy-saving US technologies and secure their more timely adoption by the US government. Pacific Northwest Laboratory (PNL) is one of four DOE laboratories that participate in the New Technologies Demonstration Program, providing technical expertise and equipment to evaluate new, energy-saving technologies being studied under that program. This interim report provides the results of a field evaluation that PNL conducted for DOE/FEMP and the US Department of Defense (DoD) Strategic Environmental Research and Development Program (SERDP) to examine the performance of a candidate energy-saving technology-a hot water heater conversion system to convert electrically heated hot water tanks to natural gas fuel. The unit was installed at a single residence at Fort Stewart, a US Army base in Georgia, and the performance was monitored under the NTDP. Participating in this effort under a Cooperative Research and Development Agreement (CRADA) were Gas Fired Products, developers of the technology; the Public Service Company of North Carolina; Atlanta Gas Light Company; the Army Corps of Engineers; Fort Stewart; and Pacific Northwest Laboratory.

Winiarski, D.W.

1995-01-01T23:59:59.000Z

423

Performance evaluation of booster materials in the plastic bonded explosive PBX 9502 in a hemispherical wave breakout test  

Science Conference Proceedings (OSTI)

An explosive booster is normally required to initiate detonation in an insensitive high explosive (lHE). Booster materials must be ignitable by a conventional detonator and deliver sufficient energy and favorable pulse shape to initiate the IHE charge. The explosive booster should be as insensitive as reasonably possible to maintain the overall safety margin of the explosive assembly. A hemispherical wave breakout test termed the on ionskin test is one of the methods of testing the performance of booster materials in an initiation train assembly. There are several variations of this basic test which are known by other names. In this test, the wave breakout time-position history at the surface of a hemispherical IHE acceptor charge is recorded, and the relative uniformity of breakout allows qualitative comparison between booster candidates and quantitative comparison of several metrics. The results of a series of onionskin experiments evaluating the performance of some new booster formulations in the triaminotrinitrobenzene (TA TB) -based plastic bonded explosive PBX 9502 will be presented. The boosters were tested in an onionskin arrangement in which the booster pellet was cylindrical, and the tests were performed at a temperature of-55{sup o}C to emphasize variations in spreading performance. The modification from the traditional hemispherical geometry facilitated efficient explosive fabrication and charge assembly, but the results indicate that this geometry was not ideal for several reasons. Despite the complications arising from geometry, promising performance was observed from booster formulations including 3,3' -diamino-4,4'azoxyfurazan.

Hooks, Daniel E [Los Alamos National Laboratory; Morris, John S [Los Alamos National Laboratory; Hill, Larry G [Los Alamos National Laboratory; Francois, Elizabeth [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

424

Performance of Transuranic-Loaded Fully Ceramic Micro-Encapsulated Fuel in LWRs Final Report, Including Void Reactivity Evaluation  

SciTech Connect

The current focus of the Deep Burn Project is on once-through burning of transuranics (TRU) in light-water reactors (LWRs). The fuel form is called Fully-Ceramic Micro-encapsulated (FCM) fuel, a concept that borrows the tri-isotropic (TRISO) fuel particle design from high-temperature reactor technology. In the Deep Burn LWR (DB-LWR) concept, these fuel particles are pressed into compacts using SiC matrix material and loaded into fuel pins for use in conventional LWRs. The TRU loading comes from the spent fuel of a conventional LWR after 5 years of cooling. Unit cell and assembly calculations have been performed using the DRAGON-4 code to assess the physics attributes of TRU-only FCM fuel in an LWR lattice. Depletion calculations assuming an infinite lattice condition were performed with calculations of various reactivity coefficients performed at each step. Unit cells and assemblies containing typical UO2 and mixed oxide (MOX) fuel were analyzed in the same way to provide a baseline against which to compare the TRU-only FCM fuel. Then, assembly calculations were performed evaluating the performance of heterogeneous arrangements of TRU-only FCM fuel pins along with UO2 pins.

Michael A. Pope; R. Sonat Sen; Brian Boer; Abderrafi M. Ougouag; Gilles Youinou

2011-09-01T23:59:59.000Z