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Note: This page contains sample records for the topic "absorption chiller research" 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.


1

Advanced Low Temperature Absorption Chiller Module Integrated...  

Broader source: Energy.gov (indexed) [DOE]

Advanced Low Temperature Absorption Chiller Module Integrated with a CHP System at a Distributed Data Center - Presentation by Exergy Partners Corp., June 2011 Advanced Low...

2

Simulating a 4-effect absorption chiller  

SciTech Connect (OSTI)

Absorption chillers are heat-operated refrigeration machines that operate on one of the earliest known principles of refrigeration. Current absorption chillers typically use either steam or a gas-fired burner as the energy source. All current gas-fired absorption cooling systems are based on the well known single-effect or double-effect cycles. To further improve utilization of the high temperature heat available from natural gas, a variety of triple-effect cycles have been proposed and are being developed that are capable of substantial performance improvement over equivalent double-effect cycles. This article describes a study that investigated the possibility of even further improving utilization of the high temperature heat available from natural gas combustion. During the study, performance simulation was conducted for a 4-effect lithium bromide/water cycle. From an environmental perspective, absorption chillers provide several benefits. They use absorption pairs (such as lithium bromide/water) as the working fluids, rather than chlorofluorocarbons or hydrochlorofluorocarbons, which contribute to ozone depletion and global warming.

Grossman, G. [Technion-Israel Inst. of Tech., Haifa (Israel). Dept. of Mechanical Engineering; Zaltash, A.; Adcock, P.W.; DeVault, R.C. [Oak Ridge National Lab., TN (United States). Energy Div.

1995-06-01T23:59:59.000Z

3

Use Low-Grade Waste Steam to Power Absorption Chillers  

SciTech Connect (OSTI)

This revised ITP tip sheet on waste steam to power absorption chillers provides how-to advice for improving the system using low-cost, proven practices and technologies.

Not Available

2006-01-01T23:59:59.000Z

4

A Numerical Model for the Dynamic Simulation of a Recirculation Single-Effect Absorption Chiller  

E-Print Network [OSTI]

A Numerical Model for the Dynamic Simulation of a Recirculation Single- Effect Absorption Chiller A dynamic model for the simulation of a new single-effect water/lithium bromide absorption chiller is developed. The chiller is driven by two distinct heat sources, includes a custom integrated falling film

Paris-Sud XI, Université de

5

Efficient solar cooling: first ever non-tracking solar collectors powering a double effect absorption chiller  

E-Print Network [OSTI]

Based Performance Analysis of a Solar Absorption Cooling andExperimental Investigation of a Solar Adsorption ChillerKreith, Jan F. Kreider. "Solar Cooling." Principles of Solar

Poiry, Heather Marie

2011-01-01T23:59:59.000Z

6

Design Considerations, Installation and Operation of the Two-Stage Parallel Flow Absorption Chiller  

E-Print Network [OSTI]

This presentation describes the actual design consideration and field operation experience of two-stage parallel flow absorption chillers. The applications include new construction, rehabilitation of old HVAC systems, cogeneration, and industrial...

Hufford, P. E.

1984-01-01T23:59:59.000Z

7

Cost reductions in absorption chillers. Final report, June 1984-May 1985  

SciTech Connect (OSTI)

Absorption chillers have great difficulty competing with the electric-driven compression alternative, due in part to modest operating efficiencies and largely to high first costs. This project is an assessment of the possibility of lowering the costs of absorption chillers dramatically by the use of low material intensity in the design of a new generation of these machines. Breakeven costs for absorption chillers, their heat exchangers and heat exchanger materials were established which will allow commercial success. Polymeric and metallic materials appropriate to particular components and which meet the cost goals were identified. A subset of these materials were tested and ordered by success in tolerating conditions and materials found in absorption chiller applications. Conceptual designs which indicate the practicality of the low material intensity approach were developed. The work reported here indicates that there is a high probability that this apporach will be successful.

Leigh, R.W.

1986-05-01T23:59:59.000Z

8

United States Department of Energy large commercial absorption chiller development program  

SciTech Connect (OSTI)

The US Department of Energy (DOE) is working with partners from the gas cooling industry to improve energy efficiency and US competitiveness by using advanced absorption technologies that eliminate the use of chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs), refrigerants that contribute to ozone depletion and global warming. Absorption cooling uses natural gas as the heat source, which produces much lower NO{sub x} emissions than oil- or coal-generated electricity. Gas-fired chillers also have the advantage of helping reduce peak electrical usage during summer months. To assist industry in developing advanced absorption cooling technologies, DOE sponsors the Large Commercial Chiller Development Program. The goal of the program is to improve chiller cooling efficiency by 30--50% compared with the best currently available absorption systems.

Garland, P.W.; DeVault, R.C.; Zaltash, A.

1998-11-01T23:59:59.000Z

9

LiCl Dehumidifier LiBr absorption chiller hybrid air conditioning system with energy recovery  

DOE Patents [OSTI]

This invention relates to a hybrid air conditioning system that combines a solar powered LiCl dehumidifier with a LiBr absorption chiller. The desiccant dehumidifier removes the latent load by absorbing moisture from the air, and the sensible load is removed by the absorption chiller. The desiccant dehumidifier is coupled to a regenerator and the desiccant in the regenerator is heated by solar heated hot water to drive the moisture therefrom before being fed back to the dehumidifier. The heat of vaporization expended in the desiccant regenerator is recovered and used to partially preheat the driving fluid of the absorption chiller, thus substantially improving the overall COP of the hybrid system.

Ko, Suk M. (Huntsville, AL)

1980-01-01T23:59:59.000Z

10

Small-Scale Industrial Cogeneration: Design Using Reciprocating Engines and Absorption Chillers  

E-Print Network [OSTI]

SMALL-SCALE INDUSTRIAL COGENERATION: DESIGN USING RECIPROCATING ENGINES AND ABSORPTION CHILLER Joseph R. Wagner Mechanical Technology Incorporated Latham, ABSTRACT This paper describes a packaged cogeneration system designed for light... industrial applications (i.e., situations where a user wants a maximum of 1 MW of cogenerated electricity). The design employs reci procating engines fueled with natural gas or liquid fuels. Waste heat from the engine exhaust and jacket water is used...

Wagner, J. R.

11

Triple effect absorption chiller utilizing two refrigeration circuits  

DOE Patents [OSTI]

A triple effect absorption method and apparatus having a high coefficient of performance. Two single effect absorption circuits are combined with heat exchange occurring between a condenser and absorber of a high temperature circuit, and a generator of a low temperature circuit. The evaporators of both the high and low temperature circuits provide cooling to an external heat load.

DeVault, Robert C. (Knoxville, TN)

1988-01-01T23:59:59.000Z

12

E-Print Network 3.0 - air-cooled water chillers Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and centrifugal chillers... ... xvi Adsorption Heat Pumps and Air Conditioners ... xvi Absorption Chillers......

13

Chapter 14: Chiller Evaluation Protocol  

SciTech Connect (OSTI)

This protocol defines a chiller measure as a project that directly impacts equipment within the boundary of a chiller plant. A chiller plant encompasses a chiller--or multiple chillers--and associated auxiliary equipment. This protocol primarily covers electric-driven chillers and chiller plants. It does not include thermal energy storage and absorption chillers fired by natural gas or steam, although a similar methodology may be applicable to these chilled water system components. Chillers provide mechanical cooling for commercial, institutional, multiunit residential, and industrial facilities. Cooling may be required for facility heating, ventilation, and air conditioning systems or for process cooling loads (e.g., data centers, manufacturing process cooling). The vapor compression cycle, or refrigeration cycle, cools water in the chilled water loop by absorbing heat and rejecting it to either a condensing water loop (water cooled chillers) or to the ambient air (air-cooled chillers).

Tiessen, A.

2014-09-01T23:59:59.000Z

14

Research on Fault Detection and Diagnosis of Scrolling Chiller with ANN  

E-Print Network [OSTI]

ICEBO2006, Shenzhen, China Co ntrol Systems for Energy Efficiency and Comfort, Vol. V-5-3 Research on Fault Detection and Diagnosis of Scrolling Chiller with ANN1 Yuli ZHOU Jie ZHENG Zhiju LIU Chaojie YANG Peng PENG... Chiller of Screw Fault Diagnose Artificial Neural Network 1 INTRODUCTION Artificial neural network based on the knowledge of neural network of human brain is to artificially form neural networks to implement some functions. It has powerful...

Zhou, Y.; Zheng, J.; Liu, Z.; Yang, C.; Peng, P.

2006-01-01T23:59:59.000Z

15

Advanced cogeneration and absorption chillers potential for service to Navy bases. Final report  

SciTech Connect (OSTI)

The US military uses millions of Btu`s of thermal energy to heat, cool and deliver process thermal energy to buildings on military bases, much of which is transmitted through a pipeline system incorporating thousands of miles of pipe. Much of this pipeline system is in disrepair and is nearing the end of its useful life, and the boilers which supply it are old and often inefficient. In 1993, Brookhaven National Laboratory (BNL) proposed to SERDP a three-year effort to develop advanced systems of coupled diesel cogenerators and absorption chillers which would be particularly useful in providing a continuation of the services now provided by increasingly antiquated district systems. In mid-February, 1995, BNL learned that all subsequent funding for our program had been canceled. BNL staff continued to develop the Program Plan and to adhere to the requirements of the Execution Plan, but began to look for ways in which the work could be made relevant to Navy and DoD energy needs even without the extensive development plan formerly envisioned. The entire program was therefore re-oriented to look for ways in which small scale cogeneration and absorption chilling technologies, available through procurement rather than development, could provide some solutions to the problem of deteriorated district heating systems. The result is, we believe, a striking new approach to the provision of building services on military bases: in many cases, serious study should be made of the possibility that the old district heating system should be removed or abandoned, and small-scale cogenerators and absorption chillers should be installed in each building. In the remainder of this Summary, we develop the rationale behind this concept and summarize our findings concerning the conditions under which this course of action would be advisable and the economic benefits which will accrue if it is followed. The details are developed in the succeeding sections of the report.

Andrews, J.W.; Butcher, T.A.; Leigh, R.W.; McDonald, R.J.; Pierce, B.L.

1996-04-01T23:59:59.000Z

16

Demonstration of an on-site PAFC cogeneration system with waste heat utilization by a new gas absorption chiller  

SciTech Connect (OSTI)

Analysis and cost reduction of fuel cells is being promoted to achieve commercial on-site phosphoric acid fuel cells (on-site FC). However, for such cells to be effectively utilized, a cogeneration system designed to use the heat generated must be developed at low cost. Room heating and hot-water supply are the most simple and efficient uses of the waste heat of fuel cells. However, due to the short room-heating period of about 4 months in most areas in Japan, the sites having demand for waste heat of fuel cells throughout the year will be limited to hotels and hospitals Tokyo Gas has therefore been developing an on-site FC and the technology to utilize tile waste heat of fuel cells for room cooling by means of an absorption refrigerator. The paper describes the results of fuel cell cogeneration tests conducted on a double effect gas absorption chiller heater with auxiliary waste heat recovery (WGAR) that Tokyo Gas developed in its Energy Technology Research Laboratory.

Urata, Tatsuo [Tokyo Gas Company, LTD, Tokyo (Japan)

1996-12-31T23:59:59.000Z

17

Simulation and performance analysis of a 4-effect lithium bromide-water absorption chiller  

SciTech Connect (OSTI)

Performance simulation has been conducted for a 4-effect lithium bromide-water chiller, capable of substantial performance improvement over state-of-the-art double-effect cycles. The system investigated includes four condensers and four desorbers coupled together, forming an extension of the conventional double-effect cycle; based on prior analytical studies, a parallel flow system was preferred over series flow, and double-condenser coupling was employed, to further improve performance. A modular computer code for simulation of absorption systems (ABSIM) was used to investigate the performances of the cycle. The simulation was carried out to investigate the influence of some major design parameters. A coefficient of performance around 2.0 (cooling) was calculated at the design point, with a heat supply temperature of 600{degrees}F (315{degrees}C) at the solution outlet from the high temperature desorber. With some optimization of the weak (pumped) solution flowrate and of the solution split among the four desorbers, this COP may be raised above 2.2.

Grossman, G. [Technion-Israel Institute of Technology, Haifa (Israel); Zaltash, A.; DeVault, R.C. [Oak Ridge National Lab., TN (United States)

1995-02-01T23:59:59.000Z

18

Ram Village South Chiller Plant  

E-Print Network [OSTI]

Winston Ram Village South Chiller Plant Dental Craige Campus Alumni Swain Stacy Thermal Student Planetarium Ackland Art Museum Research Chiller D 114 Chase Ave. APCF- Grounds Medical Morehead Stalling- Evans Sports Medicine Center Cobb Hall Ernie School Old Hospital Chiller Hanes Art Coker Wilson Battle

North Carolina at Chapel Hill, University of

19

Operation Synopsis of Gas-Fired Double-Effect Absorption Chillers  

E-Print Network [OSTI]

Absorption refrigeration systems are one of the oldest systems available. The fundamentals of absorption refrigeration were formulated about 1777, and the first successful absorption machine was developed in 1850. The first U.S. patent...

Phillips, J.

1986-01-01T23:59:59.000Z

20

Truck Thermoacoustic Generator and Chiller  

SciTech Connect (OSTI)

This Final Report describes the accomplishments of the US Department of Energy (DOE) cooperative agreement project DE-FC26-04NT42113 - Truck Thermoacoustic Generator and Chiller - whose goal is to design, fabricate and test a thermoacoustic piezoelectric generator and chiller system for use on over-the-road heavy-duty-diesel trucks, driven alternatively by the waste heat of the main diesel engine exhaust or by a burner integrated into the thermoacoustic system. The thermoacoustic system would utilize engine exhaust waste heat to generate electricity and cab air conditioning, and would also function as an auxiliary power unit (APU) for idle reduction. The unit was to be tested in Volvo engine performance and endurance test cells and then integrated onto a Class 8 over-the-road heavy-duty-diesel truck for further testing on the road. The project has been a collaboration of The Pennsylvania State University Applied Research Laboratory, Los Alamos National Laboratory, Clean Power Resources Inc., and Volvo Powertrain (Mack Trucks Inc.). Cost share funding was provided by Applied Research Laboratory, and by Clean Power Resources Inc via its grant from Innovation Works - funding that was derived from the Commonwealth of Pennsylvania. Los Alamos received its funding separately through DOE Field Work Proposal 04EE09.

Robert Keolian

2011-03-31T23:59:59.000Z

Note: This page contains sample records for the topic "absorption chiller research" 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

Analysis and System Design of a Large Chiller Plant for Korea, with or without Thermal Storage  

E-Print Network [OSTI]

% was provided by thermal storage as in the previous scheme. Electric centrifugal chillers, two (2) at 950 tons each, were still required to charge the ice tanks at night, because gas-fired absorption chillers cannot make the 28°F (-2.2"C) glycol solution... simulated. C. Electric Centrifugal Chillers with Thermal Storage: Local code requires that a maximum of 60% of the peak cooling load be satisfied "real-time" by electricity. Therefore, two (2) 1,020-ton electric centrifugal chillers provided 2,040 tons...

Levin, C.; Simmonds, P.

1996-01-01T23:59:59.000Z

22

Predicting Improved Chiller Performance Through Thermodynamic Modeling  

E-Print Network [OSTI]

This paper presents two case studies in which thermodynamic modeling was used to predict improved chiller performance. The model predicted the performance (COP and total energy consumption) of water-cooled centrifugal chillers as a function...

Figueroa, I. E.; Cathey, M.; Medina, M. A.; Nutter, D. W.

23

Energy performance listings: Electric chillers  

SciTech Connect (OSTI)

The Energy Performance Listings series provides comparative information across manufacturers on products. The Electric Chillers Listings include more than 600 models with efficiencies that meet or exceed levels contained in the American Society of Heating, Refrigerating and Air-Conditioning Engineers` (ASHRAE) Standard 90.1-1989, Energy Efficient Design of New Buildings Except New Low-Rise Residential Buildings. Information on model energy efficiency levels, performance characteristics, and manufacturer names permits easy selection of top-performing equipment. Each Energy Performance Listing includes an introductory section, two sections of model listings, and an appendix with manufacturer contacts. The first model-listing section presents information in descending order of efficiency for all manufacturers. These efficiency-ordered listings also include the symbol to identify models with efficiencies that meet or exceed U.S. DOE`s Federal Energy Management Program (FEMP). With these listings, users can quickly identify the most efficient product in a particular size range, identify products that meet the efficiency criteria of a specific voluntary program, or determine an efficiency threshold that will include a specific number of manufacturers. The second section of model listings presents products grouped by manufacturer and catalog number, allowing users to quickly find and identify performance information on specific models. Energy Performance Listings are tools that support purchasing and procurement by federal, state, and local governments and others, including utility companies, energy interest groups, and research organizations. The listings may be used for program design and planning purposes, equipment selection, specification, and purchasing decisions. The listings are a product of the Energy-Efficient Procurement Collaborative, Inc. and are available through NYSERDA.

NONE

1997-01-01T23:59:59.000Z

24

UNIVERSITY BOULEVARD FAU Research Facility  

E-Print Network [OSTI]

Harriet L.Wilkes Honors College FAU Research Facility Expansion Satellite Utility Plant Chiller Lift

Fernandez, Eduardo

25

SOLAR POWERING OF HIGH EFFICIENCY ABSORPTION CHILLER  

SciTech Connect (OSTI)

This is the Final Report for two solar cooling projects under this Cooperative Agreement. The first solar cooling project is a roof-integrated solar cooling and heating system, called the Power Roof{trademark}, which began operation in Raleigh, North Carolina in late July 2002. This system provides 176 kW (50 ton) of solar-driven space cooling using a unique nonimaging concentrating solar collector. The measured performance of the system during its first months of operation is reported here, along with a description of the design and operation of this system. The second solar cooling system, with a 20-ton capacity, is being retrofit to a commercial office building in Charleston, South Carolina but has not yet been completed.

Randy C. Gee

2004-11-15T23:59:59.000Z

26

Compact Absorption Chiller - Energy Innovation Portal  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation Proposed New SubstationCleanCommunity Involvement and Making aCompact soft x-ray

27

Chiller Plant Design Goals Low operating cost  

E-Print Network [OSTI]

3/9/09 1 2 Chiller Plant Design Goals · Low operating cost ­Energy Efficiency ­No full time staffing · Reliability ­24/7 ­ 365 ­Maintainability · Future expansion capability #12;3/9/09 2 3 Chiller T 4 Chiller Plant Electrical · Electrical ­N+1 transformer capacity ­4160 volt Compressor Motors

28

Recirculating Chiller NESLAB Manual P/N 002167  

E-Print Network [OSTI]

CFT Series Recirculating Chiller NESLAB Manual P/N 002167 Rev. 08/20/97 Instruction and Operation - CFT Series Recirculating Chiller PREFACE Compliance

Kleinfeld, David

29

Covered Product Category: Water-Cooled Electric Chillers | Department...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Electric Chillers Covered Product Category: Water-Cooled Electric Chillers The Federal Energy Management Program (FEMP) provides acquisition guidance and Federal efficiency...

30

Modeling and optimization of a chiller plant Xiupeng Wei*  

E-Print Network [OSTI]

Modeling and optimization of a chiller plant Xiupeng Wei* , Guanglin Xu 1 , Andrew Kusiak 1 algorithm Chiller plant Neural network Data-driven model a b s t r a c t A data-driven approach is utilized to model a chiller plant that has four chillers, four cooling towers, and two chilled water storage tanks

Kusiak, Andrew

31

Chiller Controls-related Energy Saving Opportunities in FederalFacilities  

SciTech Connect (OSTI)

Chillers are a significant component of large facility energy use. The focus of much of the development of chilled water systems in recent years has been on optimization of set point and staging controls, improvements in chiller design to increase efficiency and accommodate chlorofluorocarbon (CFC) refrigerant replacements. Other improvements have been made by upgrading controls to the latest digital technologies, improving access and monitoring via communications and sophisticated liquid crystal displays (LCD), more robust fault diagnostics and operating and maintenance information logging. Advances have also been made in how chiller plant systems are designed and operated, and in the diversity of chiller products that are available to support innovative approaches. As in many industries, these improvements have been facilitated by advances in, and lower costs for, enabling technologies, such as refrigerants, compressor design, electronics for controls and variable frequency drives (VFD). Along with the improvements in electronics one would expect that advances have also been made in the functionality of unit controls included with chillers. Originally, the primary purpose of this project was to investigate the state of practice of chiller unit controllers in terms of their energy saving capabilities. However, early in the study it was discovered that advances in this area did not include incorporation of significantly different capabilities than had existed 10-15 years ago. Thus the scope has been modified to provide an overview of some of the basic controls-related energy saving strategies that are currently available along with guideline estimates of their potential and applicability. We have minimized consideration of strategies that could be primarily implemented via design practices such as chiller selection and plant design, and those that can only be implemented by a building management system (BMS). Also, since most of the floor space of federal buildings occurs in large buildings, we have focused on water-cooled screw and centrifugal chillers of 100 ton capacity and greater. However, the role of reciprocating and gas chillers (absorption and engine driven) is discussed briefly. Understanding the demographics of chiller deployment in the federal sector, state of practice of energy savings strategies and control features availability will help federal energy managers and program implementers to make informed decisions in support of energy saving performance contracting (ESPC) and other programs.

Webster, Tom

2003-01-01T23:59:59.000Z

32

Semi-Empirical Screw Compressor Chiller Model  

E-Print Network [OSTI]

the system irreversibilities of the Gordon-Ng first principles approach and is applied to a screw chiller. The irreversibilities were combined into one effect based on the refrigerant temperature difference between the condenser and evaporator and the water...

Nelson, I. C.; Culp, C.; Graves, R. D.

33

Converting Centrifugal Chillers to HCFC-123  

E-Print Network [OSTI]

This paper describes the effect that the issue of ozone depletion has on the owners and operators of large commercial water chillers that currently use chlorofluorocarbons (CFC's) for refrigeration. The production ban of CFC's mandated...

Siebert, B.

34

Health Monitoring and Continuous Commissioning of Centrifugal Chiller Systems  

E-Print Network [OSTI]

This paper presents strategies for detecting and diagnosing the chiller component faults and the sensor faults involved in chiller conditioning monitoring and control. The two strategies are used in series. One strategy diagnoses and validates...

Cui, J.; Wang, S.

2004-01-01T23:59:59.000Z

35

Sustainable Operation and Management of Data Center Chillers  

E-Print Network [OSTI]

Sustainable Operation and Management of Data Center Chillers using Temporal Data Mining Debprakash mining solution to model and optimize performance of data center chillers, a key component of the cooling characterizations of chiller behavior, suit- able for a data center engineer. To aid in this transduc- tion

Ramakrishnan, Naren

36

E-Print Network 3.0 - ammonia-water absorption cycle Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Absorption Chiller Integrated System at University... with Microturbine Tom Yu, Heat Recovery Unifin International Broad ... Source: Pint, Bruce A. - Materials Science &...

37

E-Print Network 3.0 - absorption system operating Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

June 2224, 2005; Denver, CO, USA Summary: ) of over 12M. KEYWORDS Integrated energy system; combined heat and power; absorption chiller; turbine... ,500-ton double-effect...

38

Data Mining for Modeling Chiller Systems in Data Centers  

E-Print Network [OSTI]

facility power, which local utility grids supply to most data centers. However, alternative approachesData Mining for Modeling Chiller Systems in Data Centers Debprakash Patnaik1 , Manish Marwah2 in data centers, particularly the chiller ensemble. These infrastructures are poorly understood due

Ramakrishnan, Naren

39

Data Mining for Modeling Chiller Systems in Data Centers  

E-Print Network [OSTI]

Data Mining for Modeling Chiller Systems in Data Centers Debprakash Patnaik1 , Manish Marwah2 to the lack of "first principles" models of chiller systems. At the same time, they abound in data due into an actionable dynamic Bayesian network model of the system. This network is then used to explain observed system

40

E-Print Network 3.0 - advanced absorption heat Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

(uIX -8OO --o u 1MASTER Summary: to be the absorption heat pump. Single-stage systems based on technology used in current gas-fired absorption chillers... that a carefully...

Note: This page contains sample records for the topic "absorption chiller research" 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

Integrated Chiller System Reduce Building Operation and Maintenance Costs in Cold Climates  

E-Print Network [OSTI]

Although water-cooled chillers are more energy efficient than air-cooled chillers, a majority of chilled water systems use air-cooled chillers. In cold weather climates, air-cooled chillers are capable of functioning in low ambient temperatures...

Sheets, N.; Liu, M.

2003-01-01T23:59:59.000Z

42

Air-Cooled Electric Chillers, Purchasing Specifications for Energy-Efficient Products (Fact Sheet)  

SciTech Connect (OSTI)

Energy efficiency purchasing specifications for federal procurements of air-cooled electric chillers.

Not Available

2010-12-01T23:59:59.000Z

43

Replacing Inefficient Equipment - An Engineering Analysis to Justify Purchasing A More Efficient Chiller  

E-Print Network [OSTI]

was equal to the full capacity of that chiller, the lag system would be energized. After the minimum on time has expired, the lag chiller would be de- energized when the load is less than 40% of the capacity of the lead chiller. The chillers were...

Chen, H.; Deng, S.; Claridge, D. E.; Turner, W. D.; Bensouda, N.

2005-01-01T23:59:59.000Z

44

Waste to Energy and Absorption Chiller: A Case Study  

E-Print Network [OSTI]

All measured performance characteristics corresponded well to manufacturer's specifications or were within the expected range for this type of incinerator. The simplified economic analysis showed a payback of period 4.5 years. An optimized payback...

Wolpert, J.

1990-01-01T23:59:59.000Z

45

Direct Refrigeration from Heat Recovery Using 2-Stage Absorption Chillers  

E-Print Network [OSTI]

Although the cost of some fossil fuels has moderated, the importance of energy conservation by heat recovery has not diminished. The application of waste heat generated steam to produce chilled water is not new. However, there is a newly developed...

Hufford, P. E.

1983-01-01T23:59:59.000Z

46

Advanced Low Temperature Absorption Chiller Module Integrated with a CHP  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-Up fromDepartment of EnergyAdministrative2 DOE2011 DOE Hydrogen and1 DOESystem at a

47

Introduction of Heat Recovery Chiller Control and Water System Design  

E-Print Network [OSTI]

The styles, feature and main concerns of heat recovery water system are discussed, and the entering condenser water temperature control is recommended for higher chiller efficiency and reliable operation. Three optimized water system designs...

Jia, J.

2006-01-01T23:59:59.000Z

48

Modification and Validation of a Universal Thermodynamic Chiller Model Used to Evaluate the Performance of Water-Cooled Centrifugal Chillers  

E-Print Network [OSTI]

This paper presents modifications made to the procedure used to develop a universal thermodynamic model of chillers (Gordon and Ng, 1995). The modifications were necessary to capture physical phenomena involved when water is the coolant fluid...

Figueroa, I. E.; Cathey, M.; Medina, M. A.; Nutter, D. W.

1998-01-01T23:59:59.000Z

49

Comparison of Chiller Models for Use in Model-Based Fault Detection  

E-Print Network [OSTI]

, and computational requirements. The objective of this study was to evaluate different modeling approaches for their applicability to model based FDD of vapor compression chillers. Three different models were studied: the Gordon and Ng Universal Chiller model (2nd...

Sreedhara, P.; Haves, P.

2001-01-01T23:59:59.000Z

50

Temporal Data Mining Approaches for Sustainable Chiller Management in Data Centers  

E-Print Network [OSTI]

A Temporal Data Mining Approaches for Sustainable Chiller Management in Data Centers DEBPRAKASH the design and im- plementation of CAMAS (Chiller Advisory and MAnagement System), a temporal data mining solution to mine and manage chiller installations. CAMAS embodies a set of algorithms for processing

51

Temporal Data Mining Approaches for Sustainable Chiller Management in Data Centers  

E-Print Network [OSTI]

34 Temporal Data Mining Approaches for Sustainable Chiller Management in Data Centers DEBPRAKASH the design and implementation of CAMAS (Chiller Advisory and MAnagement System), a temporal data mining solution to mine and manage chiller installations. CAMAS embodies a set of algorithms for processing

Ramakrishnan, Naren

52

FEMP/NTDP Technology Focus Chiller Controls-related Energy Saving Opportunities  

E-Print Network [OSTI]

FEMP/NTDP Technology Focus Chiller Controls-related Energy Saving Opportunities in Federal.S. Department of Energy under Contract No. DE-AC03-76SF00098. 1 INTRODUCTION Chillers are a significant in recent years has been on optimization of set point and staging controls, improvements in chiller design

53

E-Print Network 3.0 - absorption conditioning factors Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

B. Berry* Rod Schwass... conditioning with an exhaust-fired double- effect absorption chiller. The IES has a net present value (NPV... .S. Department of Energy ABSTRACT The value...

54

Performance Modeling of a Solar Driven Absorption Cooling System for Carnegie Mellon University's Intelligent Workplace  

E-Print Network [OSTI]

system for space heating and cooling. The proposed energy supply system configuration includes integrated compound parabolic concentrator (ICPC), a hot storage tank, a gas fired auxiliary heater, a steam generator, a steam driven absorption chiller...

Masson, S. V.; Qu, M.; Archer, D. H.

2006-01-01T23:59:59.000Z

55

Helium-Based Soundwave Chiller: Trillium: A Helium-Based Sonic Chiller- Tons of Freezing with 0 GWP Refrigerants  

SciTech Connect (OSTI)

BEETIT Project: Penn State is designing a freezer that substitutes the use of sound waves and environmentally benign refrigerant for synthetic refrigerants found in conventional freezers. Called a thermoacoustic chiller, the technology is based on the fact that the pressure oscillations in a sound wave result in temperature changes. Areas of higher pressure raise temperatures and areas of low pressure decrease temperatures. By carefully arranging a series of heat exchangers in a sound field, the chiller is able to isolate the hot and cold regions of the sound waves. Penn State’s chiller uses helium gas to replace synthetic refrigerants. Because helium does not burn, explode or combine with other chemicals, it is an environmentally-friendly alternative to other polluting refrigerants. Penn State is working to apply this technology on a large scale.

None

2010-09-01T23:59:59.000Z

56

Covered Product Category: Air-Cooled Electric Chillers  

Broader source: Energy.gov [DOE]

FEMP provides acquisition guidance and Federal efficiency requirements for electric chillers, which are a FEMP-designated product category. Federal laws and requirements mandate that agencies meet these efficiency requirements in all procurement and acquisition actions that are not specifically exempted by law.

57

Covered Product Category: Water-Cooled Electric Chillers  

Broader source: Energy.gov [DOE]

FEMP provides acquisition guidance and Federal efficiency requirements across a variety of product categories, including water-cooled electric chillers, which is a FEMP-designated product category. Federal laws and requirements mandate that agencies meet these efficiency requirements in all procurement and acquisition actions that are not specifically exempted by law.

58

High Efficiency Adsorption Chillers: High Efficiency Adsorption Cooling Using Metal Organic Heat Carriers  

SciTech Connect (OSTI)

BEETIT Project: PNNL is incorporating significant improvements in materials that adsorb liquids or gases to design more efficient adsorption chillers. An adsorption chiller is a type of air conditioner that is powered by heat, solar or waste heat, or combustion of natural gas. Unlike typical chillers, this type has few moving parts and uses almost no electricity to operate. PNNL is designing adsorbent materials at the molecular level with at least 3 times higher refrigerant capacity and up to 20 times faster kinetics than adsorbents used in current chillers. By using the new adsorbent, PNNL is able to create a chiller that is significantly smaller, has twice the energy efficiency, and lower costs for materials and assembly time compared to conventional adsorption chillers.

None

2010-10-01T23:59:59.000Z

59

Adaptive Optimization of Central Chiller Plant Equipment Sequencing  

E-Print Network [OSTI]

and outside air conditions and it insures that the central refrigeration system operates with the lowest possible energy cost at all times. PROBLEM BACKGROUND The specific industrial plant for which the control algorithm was developed is the Texas... was developed to select the optimal sequence of central refrigeration equipment (chillers, cooling towers, pumps) to operate in an industrial plant. The control algorithm adapts the optimal equipaent sequence to reflect changes in the plant's cooling load...

Fiorino, D. P.; Priest, J. W.

60

State-of-the-Art Review on Crystallization Control Technologies for water/LiBr Absorption Heat Pumps  

SciTech Connect (OSTI)

The key technical barrier to using water/lithium bromide (LiBr) as the working fluid in aircooled absorption chillers and absorption heat-pump systems is the risk of crystallization when the absorber temperature rises at fixed evaporating pressure. This article reviews various crystallization control technologies available to resolve this problem: chemical inhibitors, heat and mass transfer enhancement methods, thermodynamic cycle modifications, and absorption system-control strategies. Other approaches, such as boosting absorber pressure and J-tube technology, are reviewed as well. This review can help guide future efforts to develop water/LiBr air-cooled absorption chillers and absorption heatpump systems.

Wang, Kai [ORNL; Abdelaziz, Omar [ORNL; Kisari, Padmaja [ORNL; Vineyard, Edward Allan [ORNL

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "absorption chiller research" 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

Aging assessment of essential HVAC chillers used in nuclear power plants  

SciTech Connect (OSTI)

The Pacific Northwest Laboratory conducted a comprehensive aging assessment of chillers used in the essential safety air-conditioning systems in nuclear power plants (NPPs). The chillers used, and air-conditioning systems served, vary in design from plant to plant. The review of operating experience indicated that chillers experience aging degradation and failures. The primary aging factors of concern for chillers include vibration, excessive temperatures and pressures, thermal cycling, chemical attack, and poor quality cooling water. The evaluation of Licensee Event Reports (LERs) indicated that about 38% of the failures were primarily related to aging, 55% were partially aging related, and 7% of the failures were unassignable. About 25% of the failures were primarily caused by human, design, procedure, and other errors. The large number of errors is probably directly related to the complexity of chillers and their interfacing systems. Nearly all of the LERs were the result of entering plant Technical Specification Limiting Condition for Operation (LCO) that initiated remedial actions like plant shutdown procedures. The trend for chiller-related LERs has stabilized at about 0.13 LERs per plant year since 1988. Carefully following the vendor procedures and monitoring the equipment can help to minimize and/or eliminate most of the premature failures. Recording equipment performance can be useful for trending analysis. Periodic operation for a few hours on a weekly or monthly basis is useful to remove moisture and non-condensable gases that gradually build up inside the chiller. Chiller pressurization kits are available that will help minimize the amount of moisture and air ingress to low-pressure chillers during standby periods. The assessment of service life condition monitoring of chillers indicated there are many simple to sophisticated methods available that can help in chiller surveillance and monitoring.

Blahnik, D.E.; Camp, T.W.

1996-09-01T23:59:59.000Z

62

Best Practices for Energy Efficient Cleanrooms Efficient HVAC Systems: Variable-Speed-Drive Chillers  

E-Print Network [OSTI]

LBNL-58636 Best Practices for Energy Efficient Cleanrooms Efficient HVAC Systems: Variable Efficient Cleanrooms Efficient HVAC Water Systems: Variable-Speed-Drive Chillers Tengfang Xu Contents HVAC.................................................................................................................................... 6 #12;HVAC Water Systems Variable-Speed-Drive Chillers Summary Cleanroom energy benchmarking data

63

Aging assessment of essential HVAC chillers used in nuclear power plants. Phase 1, Volume 1  

SciTech Connect (OSTI)

The Pacific Northwest Laboratory conducted a Phase I aging assessment of chillers used in the essential safety air-conditioning systems of nuclear power plants. Centrifugal chillers in the 75- to 750-ton refrigeration capacity range are the predominant type used. The chillers used, and air-conditioning systems served, vary in design from plant-to-plant. It is crucial to keep chiller internals very clean and to prevent the leakage of water, air, and other contaminants into the refrigerant containment system. Periodic operation on a weekly or monthly basis is necessary to remove moisture and noncondensable gases that gradually build up inside the chiller. This is especially desirable if a chiller is required to operate only as an emergency standby unit. The primary stressors and aging mechanisms that affect chillers include vibration, excessive temperatures and pressures, thermal cycling, chemical attack, and poor quality cooling water. Aging is accelerated by moisture, non-condensable gases (e.g., air), dirt, and other contamination within the refrigerant containment system, excessive start/stop cycling, and operating below the rated capacity. Aging is also accelerated by corrosion and fouling of the condenser and evaporator tubes. The principal cause of chiller failures is lack of adequate monitoring. Lack of performing scheduled maintenance and human errors also contribute to failures.

Blahnik, D.E.; Klein, R.F. [Pacific Northwest Lab., Richland, WA (United States)

1993-09-01T23:59:59.000Z

64

HVAC ENERGY EFFICIENCY CASE STUDY Evaporcool condenser air pre-cooler retrofit for air-cooled chillers  

E-Print Network [OSTI]

-cooled chillers installed at Contrails Dining Facility at Beale Air Force Base in Marysville, California-ton air-cooled chiller at the 15,000 sq. ft. Contrails Dining Facility. The project demonstrated-cooler over a multitude of possible facility sizes served, and over a large range of chiller and RTU

California at Davis, University of

65

Energy Management of Chiller Plant for Improved Efficiency and Operation  

E-Print Network [OSTI]

-l"'OFF VAHE POS ITI ot.. CHILLER LOAD Cot~P CUF~REt-lT EVAP PSIA REF TEt~P Cot?m PSIA cOtm TEt~P OIL PSIG OIL TE~lP COI?1D SUP TEt~P col?m F.:ET TEMP 513.7 41.2 50.3 40LP OFF ~ 1ILP OH 2ILP Ot.. 3ILP 011 4ILP ot-J 51.5 3CHIL STOP 4...

Alexander, D. P.; Rice, L. S.

66

Gas Powered Air Conditioning Absorption vs. Engine-Drive  

E-Print Network [OSTI]

It used to be that the only alternative to costly electric air conditioning was the double-effect gas-fired absorption chiller/heaters. Beginning in the 1980's, they were the "star" equipment promoted by gas companies throughout the nation. Although...

Phillips, J. N.

1996-01-01T23:59:59.000Z

67

Evaluation of Aqua-Ammonia Chiller Technologies and Field Site Installation  

SciTech Connect (OSTI)

The Naval Facilities Engineering Service Center (NFESC) has sponsored Oak Ridge National Laboratory (ORNL) to review, select, and evaluate advanced, gas-fired, 5-ton, aqua-ammonia, chiller technologies. The selection criteria was that units have COP values of 0.67 or better at Air-conditioning and Refrigeration Institute (ARI) 95 F outdoor rating conditions, an active refrigerant flow control, and a variable-speed condenser fan. These features are expected to allow these units to operate at higher ambient temperatures (up to the maximum operating temperature of 110 F) with minimal degradation in performance. ORNL evaluated three potential manufacturers of advanced, gas-fired, 5-ton, aqua-ammonia chillers-Robur, Ambian, and Cooling Technologies. Unfortunately, Robur did not meet the COP requirements and Cooling Technologies could not deliver a unit to be tested at the U.S. Department of Energy (DOE)-ORNL environmental chamber testing facility for thermally activated heat pumps. This eliminated these two technologies from further consideration, leaving only the Ambian chillers for evaluation. Two Ambian chillers were evaluated at the DOE-ORNL test facility. Overall these chillers operated well over a wide range of ambient conditions with minimal degradation in performance due to several control strategies used such as a variable speed condenser fan, a modulating burner, and active refrigerant flow control. These Ambian pre-commercial units were selected for installation and field testing at three federal facilities. NFESC worked with ORNL to assist with the site selection for installation and evaluation of these chillers. Two sites (ORNL and Naval Surface Warfare Center [NSWC] Corona) had a single chiller unit installed; and at one site (Naval Amphibious Base [NAB] Little Creek), two 5-ton chillers linked together were installed to provide 10 tons of cooling. A chiller link controller developed under this project was evaluated in the field test at Little Creek.

Zaltash, Abdolreza [ORNL

2007-09-01T23:59:59.000Z

68

Innovative Approach to Chiller Replacement at Lafayette General Medical Center Located in Lafayette, Louisiana  

E-Print Network [OSTI]

INNOVATIVE APPROACH TO CHILLER REPLACEMENT AT LAFAYETl'E GENERAL MEDICAL CENTER LOCATED IN LAFAYElTE, LOUISIANA James M. Pocbe*, P.E Mechanical EngineerIPresident Poche* Associates, Ltd. ABSTRACI' The rafavette General Medical Center is a 332... chillers. The Hospital had been monitoring the CFC issue for the past several years, and felt it was time to begin replacing its 30 year old machines. The Hospital's original plan at the time of budgeting was a one-forane replacement of chillers...

Poche', J. M.; Broussard, J. P.

1998-01-01T23:59:59.000Z

69

Case Study Walnut Hill United Methodist Church - Dallas, Texas, Chiller Replacement Analysis  

E-Print Network [OSTI]

In March of 1992 Walnut Hill United Methodist Church in Dallas, Tx. decided that their existing thermal storage and electric reciprocating chiller system were both in need of replacement. After analyzing several options, they chose to install 150...

Phillips, J.

1998-01-01T23:59:59.000Z

70

Thermodynamic modeling and optimization of a screw compressor chiller and cooling tower system  

E-Print Network [OSTI]

THERMODYNAMIC MODELING AND OPTIMIZATION OF A SCREW COMPRESSOR CHILLER AND COOLING TOWER SYSTEM A Thesis by RHETT DAVID GRAVES Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE December 2003 Major Subject: Mechanical Engineering THERMODYNAMIC MODELING AND OPTIMIZATION OF A SCREW COMPRESSOR CHILLER AND COOLING TOWER SYSTEM A Thesis by RHETT DAVID GRAVES Submitted to Texas A&M University in partial...

Graves, Rhett David

2004-09-30T23:59:59.000Z

71

A Control Scheme of Enhanced Reliability for Multiple Chiller Plants Using Mergerd Building Cooling Load Measurements  

E-Print Network [OSTI]

of the Eighth International Conference for Enhanced Building Operations, Berlin, Germany, October 20-22, 2008 much on the accuracy of the chiller model. Measurement accuracy and reliability are essential for the accuracy and reliability of chiller sequencing... Central Chilling Plant Monitoring and control Figure 1. Framework of enhancing building cooling load measurements using data fusion 2 ESL-IC-08-10-31 Proceedings of the Eighth International Conference for Enhanced Building Operations, Berlin, Germany...

Wang, S.; Sun, Y.; Huang, G.; Zhu, N.

72

Moments of Absorption.  

E-Print Network [OSTI]

??Moments of Absorption explores the conceptual and visual themes that are presented in my MFA thesis exhibition. The research looks into the absorption of the… (more)

Kaufman, Sarah K.

2008-01-01T23:59:59.000Z

73

Li et al., Aerosol and Air Quality Research, Vol. 6, No. 4, pp. 418-429, 2006 UV-Absorption-Based Measurements of Ozone and Mercury  

E-Print Network [OSTI]

interferences. For example, CMMs based on atomic absorption spectrometry (AAS) are subject to interferences of the Hg detection technique. Atomic absorption spectrometry (AAS) is one of the major techniques appliedLi et al., Aerosol and Air Quality Research, Vol. 6, No. 4, pp. 418-429, 2006 UV-Absorption

Li, Ying

74

Cyclic steady state performance of adsorption chiller with low regeneration temperature zeolite  

SciTech Connect (OSTI)

Adsorption chillers are capable of utilizing inexpensive or free low grade thermal energy such as waste heat and concentrated solar thermal energy. Recently developed low regeneration temperature working pairs allow adsorption chillers to be driven by even lower temperature sources such as engine coolant and flat plate solar collectors. In this work, synthetic zeolite/water was implemented into a 3kW adsorption chiller test facility driven by hot water at 70 C. The zeolite was coated onto two fin-and-tube heat exchangers, with heat recovery employed between the two. Cyclic steady state parametric studies were experimentally conducted to evaluate the chiller's performance, resulting in a cooling coefficient of performance (COP) ranging from 0.1 to 0.6 at different operating conditions. Its performance was compared with published values for other low regeneration temperature working pairs. The physical limitations of the synthetic zeolite revealed by parametric study results were then discussed. A novel operating control strategy was proposed based on the unique characteristics of synthetic zeolite. In addition, a physics-based COP prediction model was derived to predict the performance of the chiller under equilibrium loading, and was validated by the experiment results. This analytical expression can be used to estimate the cyclic steady state performance for future studies.

Qian, Mr. Suxin [University of Maryland, College Park; Gluesenkamp, Kyle R [ORNL; Hwang, Dr. Yunho [University of Maryland, College Park; Radermacher, Reinhard [University of Maryland, College Park; Chun, Mr. Ho-Hwan [University of Maryland, College Park

2013-01-01T23:59:59.000Z

75

Design, construction, and testing of the direct absorption receiver panel research experiment  

SciTech Connect (OSTI)

A panel research experiment (PRE) was designed, built, and tested as a scaled-down model of a direct absorption receiver (DAR). The PRE is a 3-MW{sub t}DAR experiment that will allow flow testing with molten nitrate salt and provide a test bed for DAR testing with actual solar heating. In a solar central receiver system DAR, the heat absorbing fluid (a blackened molten nitrate salt) flows in a thin film down a vertical panel (rather than through tubes as in conventional receiver designs) and absorbs the concentrated solar flux directly. The ability of the flowing salt film to absorb flux directly. The ability of the flowing salt film to absorb the incident solar flux depends on the panel design, hydraulic and thermal fluid flow characteristics, and fluid blackener properties. Testing of the PRE is being conducted to demonstrate the engineering feasibility of the DAR concept. The DAR concept is being investigated because it offers numerous potential performance and economic advantages for production of electricity when compared to other solar receiver designs. The PRE utilized a 1-m wide by 6-m long absorber panel. The salt flow tests are being used to investigate component performance, panel deformations, and fluid stability. Salt flow testing has demonstrated that all the DAR components work as designed and that there are fluid stability issues that need to be addressed. Future solar testing will include steady-state and transient experiments, thermal loss measurements, responses to severe flux and temperature gradients and determination of peak flux capability, and optimized operation. In this paper, we describe the design, construction, and some preliminary flow test results of the Panel Research Experiment. 11 refs., 8 figs., 2 tabs.

Chavez, J.M.; Rush, E.E.; Matthews, C.W.; Stomp, J.M.; Imboden, J.; Dunkin, S.

1990-01-01T23:59:59.000Z

76

AN AMMONIA-WATER ABSORPTION-HIAT-PUMP CYCLE Donald Kuhlenschmidt, Member ASHRAE  

E-Print Network [OSTI]

,000 Btuh) input unit reported. KLY WORDS Absorption Heat-pump Air conditioning heating Ammonia Donald conditioning chillers. The authors are involved in a project to use this cycle in an air source heat pump the cycle, comment on the design differences compared to the air conditioning application and report

Oak Ridge National Laboratory

77

Efficient solar cooling: first ever non-tracking solar collectors powering a double effect absorption chiller  

E-Print Network [OSTI]

collector, and to the right is a standard evacuated solar tube system.. 12 Figure 3: Left is a linear Fresnel

Poiry, Heather Marie

2011-01-01T23:59:59.000Z

78

Efficient solar cooling: first ever non-tracking solar collectors powering a double effect absorption chiller  

E-Print Network [OSTI]

2004) “Advances in solar thermal electricity technology”.1: Comparison of the pros and cons for various solar thermalof Three Concentrating Solar Thermal Units Designed with

Poiry, Heather Marie

2011-01-01T23:59:59.000Z

79

Efficient solar cooling: first ever non-tracking solar collectors powering a double effect absorption chiller.  

E-Print Network [OSTI]

??This thesis reviews the work that was done before my time as a graduate student so that one may understand the solar thermal technology and… (more)

Poiry, Heather Marie

2011-01-01T23:59:59.000Z

80

Efficient solar cooling: first ever non-tracking solar collectors powering a double effect absorption chiller  

E-Print Network [OSTI]

to buffer the incoming solar power to the glycol loop so asarea the available power to the solar thermal collector was

Poiry, Heather Marie

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "absorption chiller research" 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

Efficient solar cooling: first ever non-tracking solar collectors powering a double effect absorption chiller  

E-Print Network [OSTI]

R. (1980) “Solar collectors for low and intermediateSystem Using Double- glazed Collectors." Applied Thermal40: Heat loss in thermal watts from the collectors to the

Poiry, Heather Marie

2011-01-01T23:59:59.000Z

82

Efficient solar cooling: first ever non-tracking solar collectors powering a double effect absorption chiller  

E-Print Network [OSTI]

both mounted on the same tracker as the solar collector, aThe solar collector is mounted on a dual axis tracker toSolar collector(s) Pump d 1b 1 ˝” NPT 2 kW Calorimeter c 6b Flex pipe Distance ˝ “ NPT Sun Tracker

Poiry, Heather Marie

2011-01-01T23:59:59.000Z

83

Use Low-Grade Waste Steam to Power Absorption Chillers | Department of  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-Up from theDepartment of Dept. ofUSA RSDepartment of Energy

84

Applications are invited for an Environment Canada Science Horizons Youth Internship to be held in the Department of Physics at the University of Toronto. The Intern will be employed as a research assistant to  

E-Print Network [OSTI]

transform spectrometer (FTS) manufactured by ABB Bomem of Quebec. Measurements of infrared solar absorption and maintenance of the TAO FTS, its sun- tracker, and associated hardware such as a vacuum pump, chiller, and data

Strong, Kimberly

85

Model-based performance monitoring: Review of diagnostic methods and chiller case study  

SciTech Connect (OSTI)

The paper commences by reviewing the variety of technical approaches to the problem of detecting and diagnosing faulty operation in order to improve the actual performance of buildings. The review covers manual and automated methods, active testing and passive monitoring, the different classes of models used in fault detection, and methods of diagnosis. The process of model-based fault detection is then illustrated by describing the use of relatively simple empirical models of chiller energy performance to monitor equipment degradation and control problems. The CoolTools(trademark) chiller model identification package is used to fit the DOE-2 chiller model to on-site measurements from a building instrumented with high quality sensors. The need for simple algorithms to reject transient data, detect power surges and identify control problems is discussed, as is the use of energy balance checks to detect sensor problems. The accuracy with which the chiller model can be expected! to predict performance is assessed from the goodness of fit obtained and the implications for fault detection sensitivity and sensor accuracy requirements are discussed. A case study is described in which the model was applied retroactively to high-quality data collected in a San Francisco office building as part of a related project (Piette et al. 1999).

Haves, Phil; Khalsa, Sat Kartar

2000-05-01T23:59:59.000Z

86

Evaluation of HFC-245ca for commercial use in low pressure chillers. Final report, Volume I  

SciTech Connect (OSTI)

Federal regulations banned the production of CFC-11 on January 1, 1996. HCFC-123, the only commercial alternative, will be limited to service applications after January 1, 2020 and will be eliminated from production on January 1, 2030. HFC-245ca has been identified as a potential replacement for CFC-11 in retrofit applications and for HCFC-123 in new chillers, but the marginal flammability of HFC-245ca is a major obstacle to its commercial use as a refrigerant in the United States. This report assesses the commercial viability of HFC-245ca based on its experimental performance in a direct drive low pressure centrifugal chiller exclusive of its flammability characteristics. Three different impeller diameters were tested in the chiller, with all impellers having identical discharge blade angles. Experimental work included tests in a 200 ton 3 stage direct drive chiller with 3 impeller sets properly sized for each of three refrigerants, CFC-11, HCFC-123, and HFC-245ca. The commercial viability assessment focused on both retrofit and new product performance and cost.

Keuper, E.F. [Trane Co., LaCrosse, WI (United States)] [Trane Co., LaCrosse, WI (United States)

1996-03-01T23:59:59.000Z

87

Applications are invited for an Environment Canada Science Horizons Youth Internship to be held in the Department of Physics at the University of Toronto. The Intern will be employed as a research assistant to work on the project "Ongoing Air Quality  

E-Print Network [OSTI]

transform spectrometer (FTS) manufactured by ABB Bomem of Quebec. Measurements of infrared solar absorption and maintenance of the TAO FTS, its sun- tracker, and associated hardware such as a vacuum pump, chiller, and data

Strong, Kimberly

88

Two (2) 175 Ton (350 Tons total) Chiller Geothermal Heat Pumps for recently commissioned LEED Platinum Building  

Broader source: Energy.gov [DOE]

This project will operate; collect data; and market the energy savings and capital costs of a recently commissioned chiller geothermal heat pump project to promote the wide-spread adoption of this mature technology.

89

Advances in Energy Efficiency, Capital Cost, and Installation Schedules for Large Capacity Cooling Applications Using a Packaged Chiller Plant Approach  

E-Print Network [OSTI]

reductions in unit capital costs of installed chiller plant capacity on a dollar per ton basis, 2) marked improvements in total procurement and installation schedules, 3) significantly smaller space requirements, and 4) enhanced control over total system...

Pierson, T. L.; Andrepont, J. S.

90

Development of a Low-Lift Chiller Controller and Simplified Precooling Control Algorithm - Final Report  

SciTech Connect (OSTI)

KGS Buildings LLC (KGS) and Pacific Northwest National Laboratory (PNNL) have developed a simplified control algorithm and prototype low-lift chiller controller suitable for model-predictive control in a demonstration project of low-lift cooling. Low-lift cooling is a highly efficient cooling strategy conceived to enable low or net-zero energy buildings. A low-lift cooling system consists of a high efficiency low-lift chiller, radiant cooling, thermal storage, and model-predictive control to pre-cool thermal storage overnight on an optimal cooling rate trajectory. We call the properly integrated and controlled combination of these elements a low-lift cooling system (LLCS). This document is the final report for that project.

Gayeski, N.; Armstrong, Peter; Alvira, M.; Gagne, J.; Katipamula, Srinivas

2011-11-30T23:59:59.000Z

91

A neuro-computational approach to chiller fault identification and isolation  

E-Print Network [OSTI]

inputs and to operate optimally. Automated systems will significantly improve the efficiency of the chiller unit and will be economical in the long run due to reduced down time, but since the reqmred hardware has not been able to satisfy... consideration. Models are extremely important as they can be used to simulate and replicate the effects of harsh real world conditions on the system under consideration without suffering the consequences that entail such a move. They can be broadly classified...

Prabhu, Rahul Srinivas

2002-01-01T23:59:59.000Z

92

Evaluation of potential performance additives for the advanced lithium bromide chiller  

SciTech Connect (OSTI)

The effectiveness and stability of potential heat-and-mass transfer (performance) additives for an advanced lithium bromide (LiBr) chiller were evaluated in a series of experimental studies. These studies of additive effectiveness and stability were necessary because many currently used performance additives decompose at the high generator temperatures (220{degrees}C to 260{degrees}C) desired for this particular advanced LiBr chiller. For example, one common performance additive, 2-ethyl-l-hexanol (2EH), reacts with the corrosion inhibitor, lithium chromate (Li{sub 2}CrO{sub 4}), even at moderate generator temperatures ({ge}180{degrees}C). These stability problems can be mitigated by using less reactive corrosion inhibitors such as lithium molybdate (Li{sub 2}MoO{sub 4}) and by using more stable performance additives such as 1-heptanol (HEP) or 1H,1H,7H-dodecafluoro-1-heptanol (DFH). There seems to be a trade-off between additive stability and effectiveness: the most effective performance additives are not the most stable additives. These studies indicate that HEP or DFH may be effective additives in the advanced LiBr chiller if Li{sub 2}MoO{sub 4} is used as a corrosion inhibitor.

Reiner, R.H.; Del Cul, W.; Perez-Blanco, H.; Ally, M.R.; Zaltash, A.

1991-04-01T23:59:59.000Z

93

Proposal for the award of a blanket contract for the supply, commissioning and maintenance of water-and air-cooled chillers  

E-Print Network [OSTI]

Proposal for the award of a blanket contract for the supply, commissioning and maintenance of water-and air-cooled chillers

2011-01-01T23:59:59.000Z

94

Assessment and economic analysis of the MOD III Stirling-engine driven chiller system. Final report, October 1989-July 1990  

SciTech Connect (OSTI)

The Stirling engine is an inherently clean and efficient engine. With the requirements for environmentally benign emissions and high energy efficiency, the Stirling engine is an attractive alternative to both internal combustion (IC) engines and electric motors. The study evaluated a Stirling-engine-driven chiller package. Technically, the Stirling engine is a good selection as a compressor drive, with inherently low vibrations, quiet operation, long life, and low maintenance. Exhaust emissions are below the projected 1995 stringent California standards. Economically, the Stirling-engine-driven chiller is a viable alternative to both IV-engine and electric-driven chillers, trading off slightly higher installed cost against lower total operating expenses. The penetration of a small portion of the projected near-term stationary engine market opportunity will provide the volume production basis to achieve competitively priced engines.

Moryl, J.

1990-07-01T23:59:59.000Z

95

Healthcare Energy Efficiency Research and Development  

E-Print Network [OSTI]

c. Hourly kBtu vs. outdoor temp. BTU meter, chiller, coolingpumps electrical power One BTU meter, each chiller input viavia VFD's Chiller Plant BTU Meter $ 4000, Chillers, Towers

Lanzisera,, Judy Lai, Steven M.

2012-01-01T23:59:59.000Z

96

A Fluidized Bed Chiller: A New Approach in Making Slush-Ice  

E-Print Network [OSTI]

A FLUIDIZED BED CHILLER: A NEW APPROACH IN MAKING SLUSH-ICE Dr.Ir. D.G. Klaren M.Sc. Technical Director Gebr. Scheffers B.V. Schiedam, The Netherlands ABSTRACT A fluidized bed heat exchanger already successfully applied for heat transfer... applications involving severely fouling liquids, can also be used in making slush-ice. Overwhelming world-wide interest confirms the importance of this technology. This paper explains the principle and presents the first results of this fas cinating new...

Klaren, D. G.; Van Der Meer, J. S.

97

Building Commissioning in the Chinese Mainland  

E-Print Network [OSTI]

Governmental buildingsGovernmental buildings Building InformationBuilding Information Electric chiller ( FCU, AHU )Electric chiller ( FCU, AHU ) 29302930 18001800 39, 60039, 600 JJGasGas--burned Heat Absorption Chiller (FCU)burned Heat Absorption Chiller (FCU...)2456245660060041, 51041, 510GGGasGas--burned Heat Absorption Chiller + Electric chiller burned Heat Absorption Chiller + Electric chiller (FCU)(FCU)65326532>800>80050, 00050, 000HH Electric chiller ( FCU, AHU )Electric chiller ( FCU, AHU ) 47004700 560560 45, 45045...

Zhu, Y.

2006-01-01T23:59:59.000Z

98

Preconcentrator with high volume chiller for high vapor pressure particle detection  

SciTech Connect (OSTI)

Apparatus and method for collecting particles of both high and low vapor pressure target materials entrained in a large volume sample gas stream. Large volume active cooling provides a cold air supply which is mixed with the sample gas stream to reduce the vapor pressure of the particles. In embodiments, a chiller cools air from ambient conditions to 0-15.degree. C. with the volumetric flow rate of the cold air supply being at least equal to the volumetric flow rate of the sample gas stream. In further embodiments an adsorption media is heated in at least two stages, a first of which is below a threshold temperature at which decomposition products of the high vapor pressure particle are generated.

Linker, Kevin L

2013-10-22T23:59:59.000Z

99

Multi-stage quantum absorption heat pumps  

E-Print Network [OSTI]

It is well known that heat pumps, while being all limited by the same basic thermodynamic laws, may find realization on systems as "small" and "quantum" as a three-level maser. In order to quantitatively assess how the performance of these devices scales with their size, we design generalized $N$-dimensional ideal heat pumps by merging $N-2$ elementary three-level stages. We set them to operate in the absorption chiller mode between given hot and cold baths, and study their maximum achievable cooling power and the corresponding efficiency as a function of $N$. While the efficiency at maximum power is roughly size-independent, the power itself slightly increases with the dimension, quickly saturating to a constant. Thus, interestingly, scaling up autonomous quantum heat pumps does not render a significant enhancement beyond the optimal double-stage configuration.

Luis A. Correa

2014-01-16T23:59:59.000Z

100

Performance bound for quantum absorption refrigerators  

E-Print Network [OSTI]

An implementation of quantum absorption chillers with three qubits has been recently proposed, that is ideally able to reach the Carnot performance regime. Here we study the working efficiency of such self-contained refrigerators, adopting a consistent treatment of dissipation effects. We demonstrate that the coefficient of performance at maximum cooling power is upper bounded by 3/4 of the Carnot performance. The result is independent of the details of the system and the equilibrium temperatures of the external baths. We provide design prescriptions that saturate the bound in the limit of a large difference between the operating temperatures. Our study suggests that delocalized dissipation, which must be taken into account for a proper modelling of the machine-baths interaction, is a fundamental source of irreversibility which prevents the refrigerator from approaching the Carnot performance arbitrarily closely in practice. The potential role of quantum correlations in the operation of these machines is also investigated.

Luis A. Correa; José P. Palao; Gerardo Adesso; Daniel Alonso

2013-04-29T23:59:59.000Z

Note: This page contains sample records for the topic "absorption chiller research" 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.


101

Analysis of IECC2003 Chiller Heat Recovery for Service Water Heating Requirement for New York State  

SciTech Connect (OSTI)

The state of New York asked the U.S. Department of Energy to evaluate the cost-effectiveness of the requirement for Heat Recovery for Service Water Heating that exists in the 2003 International Energy Conservation Code to determine whether this requirement should be adopted into the New York State Energy Code. A typical hotel application that would trigger this requirement was examined using whole building simulation software to generate baseline annual chiller and service hot water loads, and a spreadsheet was used to examine the energy savings potential for heat recovery using hourly load files from the simulation. An example application meeting the code requirement was developed, and the energy savings, energy cost savings, and first costs for the heat recovery installation were developed. The calculated payback for this application was 6.3 years using 2002 New York state average energy costs. This payback met the minimum requirements for cost effectiveness established for the state of New York for updating the commercial energy conservation code.

Winiarski, David W.

2004-08-15T23:59:59.000Z

102

actively cooled resonators: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

effect H2OLiBr absorption cooling cycles, Applied Thermalabsorption chillers5, 6, 7, adsorption chillers 8, and open cooling cyclesabsorption chiller works by using thermal...

103

Performance Evaluation of a 4.5 kW (1.3 Refrigeration Tons) Air-Cooled Lithium Bromide/Water Solar Powered (Hot-Water-Fired) Absorption Unit  

SciTech Connect (OSTI)

During the summer months, air-conditioning (cooling) is the single largest use of electricity in both residential and commercial buildings with the major impact on peak electric demand. Improved air-conditioning technology has by far the greatest potential impact on the electric industry compared to any other technology that uses electricity. Thermally activated absorption air-conditioning (absorption chillers) can provide overall peak load reduction and electric grid relief for summer peak demand. This innovative absorption technology is based on integrated rotating heat exchangers to enhance heat and mass transfer resulting in a potential reduction of size, cost, and weight of the "next generation" absorption units. Rotartica Absorption Chiller (RAC) is a 4.5 kW (1.3 refrigeration tons or RT) air-cooled lithium bromide (LiBr)/water unit powered by hot water generated using the solar energy and/or waste heat. Typically LiBr/water absorption chillers are water-cooled units which use a cooling tower to reject heat. Cooling towers require a large amount of space, increase start-up and maintenance costs. However, RAC is an air-cooled absorption chiller (no cooling tower). The purpose of this evaluation is to verify RAC performance by comparing the Coefficient of Performance (COP or ratio of cooling capacity to energy input) and the cooling capacity results with those of the manufacturer. The performance of the RAC was tested at Oak Ridge National Laboratory (ORNL) in a controlled environment at various hot and chilled water flow rates, air handler flow rates, and ambient temperatures. Temperature probes, mass flow meters, rotational speed measuring device, pressure transducers, and a web camera mounted inside the unit were used to monitor the RAC via a web control-based data acquisition system using Automated Logic Controller (ALC). Results showed a COP and cooling capacity of approximately 0.58 and 3.7 kW respectively at 35 C (95 F) design condition for ambient temperature with 40 C (104 F) cooling water temperature. This is in close agreement with the manufacturer data of 0.60 for COP and 3.9 kW for cooling capacity. This study resulted in a complete performance map of RAC which will be used to evaluate the potential benefits of rotating heat exchangers in making the "next-generation" absorption chillers more compact and cost effective without any significant degradation in the performance. In addition, the feasibility of using rotating heat exchangers in other applications will be evaluated.

Zaltash, Abdolreza [ORNL; Petrov, Andrei Y [ORNL; Linkous, Randall Lee [ORNL; Vineyard, Edward Allan [ORNL

2007-01-01T23:59:59.000Z

104

Ultrasonic absorption in liquid mixtures  

E-Print Network [OSTI]

, It is obvious that much moxe experimental dates both absorption snd thermalv is needed before this theory can be substantiated Purpose of the Investigation Ths present research was undertaken to investigate thoroughly ths absorption in mixtuxws of ethanol... Agricultural and lheohaaioal College of %nas ia partial fulfi&went of tbs aequtreaante for the daggse of ~t %53 ~or Sub)eot Pllgedss Table of Contents Ii Beokgxeund snd Theory Absorption in Pure Liqu1ds 8, Absorpt1on in Idquid Bixtures XI Purpose...

Davis, James Madison

2012-06-07T23:59:59.000Z

105

Development and Verification for the Control Method Using Surplus Pressure of Primary Pumps in Chiller Plant Systems for Air Conditioning which Adopts Primary/Secondary Piping Systems PPT  

E-Print Network [OSTI]

(chiller side) and secondary flow loop (load side). It is a huge energy loss, because the primary pumps use their head to lead much flow to the decoupler. Therefore, we have developed new control method using surplus pressure of the primary pump to reduce...

Matsushita, N.; Fujimura, M.; Sumiyoshi, D.; Akashi, Y.

2012-01-01T23:59:59.000Z

106

ENCAPSULATION EFFECTS ON CARBONACEOUS AEROSOL LIGHT ABSORPTION  

E-Print Network [OSTI]

ENCAPSULATION EFFECTS ON CARBONACEOUS AEROSOL LIGHT ABSORPTION Arthur Sedlacek, Brookhaven National of aerosol absorption on direct radiative forcing is still an active area of research, in part, because. This poster presents data on black carbon (BC) light absorption measured by Photothermal Interferometry

107

A research needs assessment: Energy efficient alternatives to chlorofluorocarbons (CFCs). Final reprot  

SciTech Connect (OSTI)

An assessment of the state of the art in refrigeration and insulation technologies is carried out to evaluate the potential for efficient substitutes for CFCs and HCFCs to facilitate the transition to a CFC-free environment. Opportunities for improved efficiency in domestic refrigeration, building chillers, commercial refrigeration and industrial refrigeration are evaluated. Needs for alternate refrigerants, improved components, and/or alternate cycles are identified. A summary of on-going research is presented in each area, and the potential roles of industry and government are considered. The most promising approaches for refrigeration technology fall into these categories: (1) improved vapor compressor cycles with alternate fluids, (2) Stirling cycle development and (3) advances in absorption technology. A summary of on-going research into advanced insulation, focused on vacuum -- based insulation technology refrigeration is developed. Insulation applications considered include appliances, transport refrigeration, and buildings. Specific recommendations for a long-term R&D agenda are present. The potential benefits, research, general approach, and probability of success are addressed.

Not Available

1993-06-01T23:59:59.000Z

108

Cyber-Physical Systems ... Principal Researcher  

E-Print Network [OSTI]

;Electrical & Mechanical Systems Power grid Transformer Water chillers Generators UPS CRAC PDU Racks air water

Hunt, Galen

109

ABSORPTION HEAT PUMP IN THE DISTRICT HEATING  

E-Print Network [OSTI]

Zasulauks ­ wood-chips fired boiler house, (20 MWth) in 2013/05 · DHP Ziepniekkalns ­ wood-chips fired cogeneration unit, (4 MWel, 22 MWth) in 2013/2. · DHP Vecmlgrvis ­ wood-chips fired boilers, (2x7 MWth) in 2010, Nuremberg, 15-16.10.2013 · Cooling load is close to the set up chiller capacity · HP/chiller is designed

Oak Ridge National Laboratory

110

(Research at and operation of the material science x-ray absorption beamline (X-11) at the National Synchrotron Light Source)  

SciTech Connect (OSTI)

This report discusses three projects at the Material Science X-Ray Absorption Beamline. Topics discussed include: XAFS study of some titanium silicon and germanium compounds; initial XAS results of zirconium/silicon reactions; and low angle electron yield detector.

Not Available

1992-01-01T23:59:59.000Z

111

[Research at and operation of the material science x-ray absorption beamline (X-11) at the National Synchrotron Light Source]. Progress report  

SciTech Connect (OSTI)

This report discusses three projects at the Material Science X-Ray Absorption Beamline. Topics discussed include: XAFS study of some titanium silicon and germanium compounds; initial XAS results of zirconium/silicon reactions; and low angle electron yield detector.

Not Available

1992-08-01T23:59:59.000Z

112

Optimizing the Low Temperature Cooling Energy Supply: Experimental Performance of an Absorption Chiller, a Compression Refrigeration Machine and Direct Cooling - a Comparison  

E-Print Network [OSTI]

A strategy to optimize the low temperature cooling energy supply of a newly build office building is discussed against the background of a changing energy system. It is focused on, what production way - Direct Cooling, the Compression Refrigeration...

Uhrhan, S.; Gerber, A.

2012-01-01T23:59:59.000Z

113

The role of solar absorption in climate and climate change  

E-Print Network [OSTI]

1 The role of solar absorption in climate and climate change William Collins UC Berkeley Research Boulder, Colorado, USA #12;2 Prior Research on Absorption and Climate Field Experiments: · Central · Climate with enhanced cloud absorption Synthesis of models and aerosol observations: · Development

114

Oral Drug Absorption  

E-Print Network [OSTI]

properties ? membrane permeability ? metabolic stability ? enzyme inhibition or induction ? protein binding ? transporter affinity ?. Chemical Optimization DDS technology 4 Strategy of Drug Delivery Absorption Distribution Metabolism Excretion Improve of drug... absorption absorption enhancement controlled releasecontrolled release new administration route Drug targeting to the tissue to the cell to the organelle Dr. Shinji Yamashita (Setsunan University) Issue: Oral Drug Absorption Dr. Valentino J. Stella...

Yamashita, Shinji

2006-10-26T23:59:59.000Z

115

HII Absorption Bill Erickson  

E-Print Network [OSTI]

HII Absorption Bill Erickson November 10, 2006 It would make all of the drift curve simulations.8 dB above the data. One reason for this might be HII absorption which is not modeled in simulations. There are a number of ways that one might try to estimate the absorption. One might use optical maps of HII

Ellingson, Steven W.

116

Transient Absorption Spectroscopy with Isolated Attosecond Pulses  

E-Print Network [OSTI]

viii Attosecond transient absorption instrument. . . . . .5.2.2 AbsorptionTransient absorption spectroscopy . . . . . . . . . . . .

Bell, Marie Justine

2013-01-01T23:59:59.000Z

117

Which Absorption Model Should Be Used for Supercooled  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Absorption Model Should Be Used for Supercooled Liquid Water in the Microwave? For original submission and image(s), see ARM Research Highlights http:www.arm.govscience...

118

E-Print Network 3.0 - air conditioners electronic Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AND NEXT GENERATION Summary: ... xvi Adsorption Heat Pumps and Air Conditioners ... xvi Absorption Chillers......

119

E-Print Network 3.0 - air conditioner screening Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AND NEXT GENERATION Summary: ... xvi Adsorption Heat Pumps and Air Conditioners ... xvi Absorption Chillers......

120

E-Print Network 3.0 - ac line conditioners Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AND NEXT GENERATION Summary: ... xvi Adsorption Heat Pumps and Air Conditioners ... xvi Absorption Chillers......

Note: This page contains sample records for the topic "absorption chiller research" 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

E-Print Network 3.0 - array power conditioner Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AND NEXT GENERATION Summary: ... xvi Adsorption Heat Pumps and Air Conditioners ... xvi Absorption Chillers......

122

E-Print Network 3.0 - adsorption air conditioner Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AND NEXT GENERATION Summary: ... xvi Adsorption Heat Pumps and Air Conditioners ... xvi Absorption Chillers......

123

Chillers | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating SolarElectricEnergyCTBarreisVolcanic National Park |Chile: Energy Resources Jump

124

Optimization of a solar powered absorption cycle under Abu Dhabi's weather conditions  

SciTech Connect (OSTI)

In order for the solar absorption air conditioners to become a real alternative to the conventional vapour compression systems, their performance has to be improved and their total cost has to be reduced. A solar powered absorption cycle is modeled using the Transient System Simulation (TRNSYS) program and Typical Meteorological Year 2 data of Abu Dhabi. It uses evacuated tube collectors to drive a 10 kW ammonia-water absorption chiller. Firstly, the system performance and its total cost are optimized separately using single objective optimization algorithms. The design variables considered are: the collector slope, the collector mass flow rate, the collector area and the storage tank volume. The single objective optimization results show that MATLAB global optimization methods agree with the TRNSYS optimizer. Secondly, MATLAB is used to solve a multi-objective optimization problem to improve the system's performance and cost, simultaneously. The optimum designs are presented using Pareto curve and show the potential improvements of the baseline system. (author)

Al-Alili, A.; Hwang, Y.; Radermacher, R. [Department of Mechanical Engineering, University of Maryland, College Park, MD (United States); Kubo, I. [Department of Mechanical Engineering, The Petroleum Institute, Abu Dhabi (United Arab Emirates)

2010-12-15T23:59:59.000Z

125

X-ray absorption spectroscopy  

E-Print Network [OSTI]

009-9473-8 REVIEW X-ray absorption spectroscopy Junko Yano Ćand application of X-ray absorption spectroscopy, bothX-ray absorption near-edge structure (XANES) and extended X-

Yano, Junko; Yachandra, Vittal K.

2009-01-01T23:59:59.000Z

126

X-ray Absorption Spectroscopy  

E-Print Network [OSTI]

type: Review X-ray Absorption Spectroscopy Junko Yano andPhotosystem II; XAS, X-ray absorption spectroscopy; EXAFS,X-ray absorption fine structure; EPR, electron paramagnetic

Yano, Junko

2010-01-01T23:59:59.000Z

127

Absorption heat pump system  

DOE Patents [OSTI]

The efficiency of an absorption heat pump system is improved by conducting liquid from a second stage evaporator thereof to an auxiliary heat exchanger positioned downstream of a primary heat exchanger in the desorber of the system.

Grossman, G.

1982-06-16T23:59:59.000Z

128

Absorption heat pump system  

DOE Patents [OSTI]

The efficiency of an absorption heat pump system is improved by conducting liquid from a second stage evaporator thereof to an auxiliary heat exchanger positioned downstream of a primary heat exchanger in the desorber of the system.

Grossman, Gershon (Oak Ridge, TN)

1984-01-01T23:59:59.000Z

129

Solar selective absorption coatings  

DOE Patents [OSTI]

A new class of solar selective absorption coatings are disclosed. These coatings comprise a structured metallic overlayer such that the overlayer has a sub-micron structure designed to efficiently absorb solar radiation, while retaining low thermal emissivity for infrared thermal radiation. A sol-gel layer protects the structured metallic overlayer from mechanical, thermal, and environmental degradation. Processes for producing such solar selective absorption coatings are also disclosed.

Mahoney, Alan R. (Albuquerque, NM); Reed, Scott T. (Albuquerque, NM); Ashley, Carol S. (Albuquerque, NM); Martinez, F. Edward (Horseheads, NY)

2003-10-14T23:59:59.000Z

130

Solar selective absorption coatings  

DOE Patents [OSTI]

A new class of solar selective absorption coatings are disclosed. These coatings comprise a structured metallic overlayer such that the overlayer has a sub-micron structure designed to efficiently absorb solar radiation, while retaining low thermal emissivity for infrared thermal radiation. A sol-gel layer protects the structured metallic overlayer from mechanical, thermal, and environmental degradation. Processes for producing such solar selective absorption coatings are also disclosed.

Mahoney, Alan R. (Albuquerque, NM); Reed, Scott T. (Albuquerque, NM); Ashley, Carol S. (Albuquerque, NM); Martinez, F. Edward (Horseheads, NY)

2004-08-31T23:59:59.000Z

131

Seven-effect absorption refrigeration  

DOE Patents [OSTI]

A seven-effect absorption refrigeration cycle is disclosed utilizing three absorption circuits. In addition, a heat exchanger is used for heating the generator of the low absorption circuit with heat rejected from the condenser and absorber of the medium absorption circuit. A heat exchanger is also provided for heating the generator of the medium absorption circuit with heat rejected from the condenser and absorber of the high absorption circuit. If desired, another heat exchanger can also be provided for heating the evaporator of the high absorption circuit with rejected heat from either the condenser or absorber of the low absorption circuit. 1 fig.

DeVault, R.C.; Biermann, W.J.

1989-05-09T23:59:59.000Z

132

Seven-effect absorption refrigeration  

DOE Patents [OSTI]

A seven-effect absorption refrigeration cycle is disclosed utilizing three absorption circuits. In addition, a heat exchanger is used for heating the generator of the low absorption circuit with heat rejected from the condenser and absorber of the medium absorption circuit. A heat exchanger is also provided for heating the generator of the medium absorption circuit with heat rejected from the condenser and absorber of the high absorption circuit. If desired, another heat exchanger can also be provided for heating the evaporator of the high absorption circuit with rejected heat from either the condenser or absorber of the low absorption circuit.

DeVault, Robert C. (Knoxville, TN); Biermann, Wendell J. (Fayetteville, NY)

1989-01-01T23:59:59.000Z

133

Simulation and performance analysis of a quadruple-effect lithium bromide-water absorption  

SciTech Connect (OSTI)

In order to investigate the possibility of improving utilization of high temperature heat sources, such as natural gas, for absorption chillers, performance simulation has been conducted for a quadruple-effect lithium bromide-water cycle, capable of substantial performance improvement over state-of-the-art double-effect cycles. The system investigated includes four condensers and four desorbers coupled together, forming an extension of the conventional double-effect cycle; based on prior experience, a parallel flow system was perferred over series flow, and double-condenser coupling (DCC) was employed, extending from triple-effect cycles, to further improve performance. A modular computer code for simulation of absorption systems (ABSIM) was used to investigate the performances of the cycle. The simulation was carried out over a range of operating conditions, including investigation of the influence of some major design parameters. A coefficient of performance in the neighborhood of 2.0 (cooling) was calculated at the design point, with a heat supply temperature of 600{degrees}F at the solution outlet from the high temperature desorber. With some optimization of the weak (pumped) solution flowrate and of the solution split among the four desorbers, this COP may be raised above 2.2, without any increase in the heat transfer surface of the system`s components.

Grossman, G. [Technion-Israel Inst. of Tech., Haifa (Israel). Faculty of Mechanical Engineering; Zaltash, A.; DeVault, R.C. [Oak Ridge National Lab., TN (United States)

1994-04-01T23:59:59.000Z

134

TATA INSTITUTE OF FUNDAMENTAL RESEARCH TIFR Centre for Interdisciplinary Sciences  

E-Print Network [OSTI]

and maintenance of HVAC systems including Central AC Systems, Chillers, Cooling towers, AHU , Split A/C, Window A

Shyamasundar, R.K.

135

TATA INSTITUTE OF FUNDAMENTAL RESEARCH TIFR Center for Interdisciplinary Sciences  

E-Print Network [OSTI]

and maintenance of HVAC systems including Central AC Systems, Chillers, Cooling towers, AHU , Split A/C, Window A

Shyamasundar, R.K.

136

E-Print Network 3.0 - absorption cycle heat Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

>> 1 Aft'-',, ,?i.Q<, A lFBLE COPY .... -. v' 0 Summary: pumps include engine-driven heat pumps, absorption cycle, and ejector heat pumps. CURRENT RESEARCH... ;absorption...

137

Absorption heat pump system  

DOE Patents [OSTI]

An improvement in an absorption heat pump cycle is obtained by adding adiabatic absorption and desorption steps to the absorber and desorber of the system. The adiabatic processes make it possible to obtain the highest temperature in the absorber before any heat is removed from it and the lowest temperature in the desorber before heat is added to it, allowing for efficient utilization of the thermodynamic availability of the heat supply stream. The improved system can operate with a larger difference between high and low working fluid concentrations, less circulation losses, and more efficient heat exchange than a conventional system.

Grossman, Gershon (Oak Ridge, TN); Perez-Blanco, Horacio (Knoxville, TN)

1984-01-01T23:59:59.000Z

138

Intrinsic AGN Absorption Lines  

E-Print Network [OSTI]

Strong absorption lines are common in rest-frame UV spectra of AGNs due to a variety of resonant transitions, for example the HI Lyman series lines (most notably Ly-alpha 1216) and high-ionization doublets like CIV 1549,1551. The lines are called ``intrinsic'' if the absorbing gas is physically related to the AGN, e.g. if the absorber resides broadly within the radius of the AGN's surrounding ``host'' galaxy. Intrinsic absorption lines are thus valuable probes of the kinematics, physical conditions and elemental abundances in the gas near AGNs. Studies of intrinsic absorbers have historically emphasized the broad absorption lines (BALs) in quasars. Today we recognize a wider variety of intrinsic lines in a wider range of objects. For example, we now know that Seyfert 1 galaxies (the less luminous cousins of quasars) have intrinsic absorption. We also realize that intrinsic lines can form in a range of AGN environments --- from the dynamic inner regions like the BALs, to the more quiescent outer host galaxies >10 kpc away. This article provides a brief introduction to current observational and theoretical work on intrinsic AGN absorbers.

Fred Hamann

2000-06-12T23:59:59.000Z

139

The Quantum Absorption Refrigerator  

E-Print Network [OSTI]

A quantum absorption refrigerator driven by noise is studied with the purpose of determining the limitations of cooling to absolute zero. The model consists of a working medium coupled simultaneously to hot, cold and noise baths. Explicit expressions for the cooling power are obtained for Gaussian and Poisson white noise. The quantum model is consistent with the first and second laws of thermodynamics. The third law is quantified, the cooling power J_c vanishes as J_c proportional to T_c^{alpha}, when T_c approach 0, where alpha =d+1 for dissipation by emission and absorption of quanta described by a linear coupling to a thermal bosonic field, where d is the dimension of the bath.

Amikam Levy; Ronnie Kosloff

2011-11-09T23:59:59.000Z

140

VARIOUS APPLICATIONS OF ZEEMAN ATOMIC ABSORPTION SPECTROSCOPY  

E-Print Network [OSTI]

APPLICATIONS OF ZEEMAN ATOMIC ABSORPTION SPECTROSCOPYthe Zeeman effect to atomic absorption spectroscopy has beenthe Zeeman effect on atomic absorption spectrometry has been

Koizumi, Hideaki

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "absorption chiller research" 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

Moisture absorption modeling using design of experiments  

E-Print Network [OSTI]

Moisture Absorption Modeling Using Design of Experimentssurface pro?les of moisture absorption for the two laminatetheir amounts of moisture absorption are different. The

Yong, Virginia; Hahn, H. Thomas

2006-01-01T23:59:59.000Z

142

Research  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassive Solar HomePromisingStories » RemovingResearch CORE-SHELL NANOPARTICLES AND

143

E-Print Network 3.0 - absorption laser-induced fluorescence Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

J. Muzio and G. C. Quartucy, "Implementing NOx Control: Research to Application," Prog. Energy Combust. Sci. 23, 233-266 (1997). Summary: Cavity Ringdown Absorption and...

144

Antiproton Absorption in Nuclei  

E-Print Network [OSTI]

We present the analysis of experimental data on forward antiproton production on nuclei. The calculations are done in the framework of a folding model which takes properly into account both incoherent direct proton-nucleon and cascade pion-nucleon antiproton production processes as well as internal nucleon momentum distribution. The effective antiproton-nucleon cross section in nuclear matter and the imaginary part of the antiproton nuclear optical potential are estimated to be 25-45 mb and -(38-56) MeV at normal nuclear matter density, respectively. The results of the performed analysis evidence for the decreasing of antiproton absorption in the nuclear medium.

Yu. T. Kiselev; E. Ya. Paryev

2006-01-24T23:59:59.000Z

145

The Quantum Absorption Refrigerator Amikam Levy and Ronnie Kosloff  

E-Print Network [OSTI]

, 07.20.Pe,05.30.-d I. INTRODUCTION The adsorption chiller is a refrigerator which employs a heat source to replace mechanical work for driving a heat pump [1]. The first device was developed in 1850 c J h P Tc Th Tw - - - 0 FIG. 1: The quantum trickle: A quantum heat pump des- ignated

Kosloff, Ronnie

146

Demand Side Management (DSM) Through Absorption Refrigeration Systems  

E-Print Network [OSTI]

DEMAND SIDE MANAGEMENT (DSM) TIIROUGH ABSORPTION REFRIGERATION SYSTEMS Peter Y. Chao, PhD, Deepak Shukla, PhD, Sr. Process Engineers, TENSA Services, Inc. Ammi Amarnath, Sr. Project Manager, Electrical Power Research Institute Ed. Mergens.... They are Peak Clipping, Valley filling, Load Shifting, Strategic Conservation, Strategic Load Growth, and Flexible Load Shaping. Absorption Refrigeration from waste heat offers a viable option for DSM. This will either reduce the peak load (peak clipping...

Chao, P. Y.; Shukla, D.; Amarnath, A.; Mergens, E.

147

Development of Updated ABsorption SIMulation Software (ABSIM)  

SciTech Connect (OSTI)

ABsorption SIMulation, ABSIM, was developed for the simulation of absorption systems by The Oak Ridge National Laboratory during 1980s and 1990s. ABSIM provides a platform for users to investigate various cycle configurations and working fluids, to calculate their operating parameters, to predict their performance, and to compare them with each other on a uniform basis. ABSIM is indeed a very useful and accurate tool for researchers to investigate various absorption systems. However, it has not been well maintained: it is incompatible with recent operating systems; the interface needs improved user-friendliness, and the system needs better parameter setting and debugging tools to help achieve convergence. Therefore, it is highly needed to update and improve ABSIM. The paper presents recent efforts to improve ABSIM s compatibility with current operating systems, user interface, and analysis capabilities. The paper details the features and functions of the newly updated ABSIM software. The new ABSIM still uses the previously validated calculation engine of the old ABSIM. The new graphic user interfaces (GUI) were developed in Qt, which is an open source license GUI software based on C++. XML was used as the database for data storage in the new ABSIM. The new ABSIM has been designed to be easily learned and used. It has enhanced editing and construction functions, plus enhanced analysis features including parametric tables, plotting, property plots, and master panels for debugging. A single effect water/LiBr absorption system is used as a case study in this paper to illustrate the features, capabilities, and functions of the new ABSIM. This case study was actually an example system available in the old ABSIM. The new version of ABSIM will be continuously developed to include additional subroutines for the components in liquid desiccant systems. The new ABSIM will be available to public for free. The ultimate goal of the new ABSIM is to allow it to become a simulation platform for both absorption heat pump and liquid desiccant systems.

Yang, Zhiyao [Purdue University, West Lafayette, IN; Tang, Xin [Purdue University, West Lafayette, IN; Qu, Ming [Purdue University, West Lafayette, IN; Abdelaziz, Omar [ORNL; Gluesenkamp, Kyle R [ORNL

2014-01-01T23:59:59.000Z

148

Use Low-Grade Waste Steam to Power Absorption Chillers, Energy Tips: STEAM, Steam Tip Sheet #14 (Fact Sheet), Advanced Manufacturing Office (AMO), Energy Efficiency & Renewable Energy (EERE)  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy Usage »of EnergyTheTwo New12.'6/0.2 ......Uranium LeaseThrough the Use ofPROGRAM4

149

EMERGING INFRARED LASER ABSORPTION SPECTROSCOPIC  

E-Print Network [OSTI]

CHAPTER 4 EMERGING INFRARED LASER ABSORPTION SPECTROSCOPIC TECHNIQUES FOR GAS ANALYSIS Frank K detection and monitoring of molecular trace gas species in the mid-infrared spectral region be- cause many of the infrared laser source. Well established detection methods include several types of multipass gas absorption

150

Eta absorption by mesons  

E-Print Network [OSTI]

Using the $[SU(3)_{\\mathrm{L}} \\times SU(3)_{\\mathrm{R}}]_{\\mathrm{global}% }\\times [SU(3)_V]_{\\mathrm{local}}$ chiral Lagrangian with hidden local symmetry, we evaluate the cross sections for the absorption of eta meson ($% \\eta$) by pion ($\\pi$), rho ($\\rho$), omega ($\\omega$), kaon ($K$), and kaon star ($K^*$) in the tree-level approximation. With empirical masses and coupling constants as well as reasonable values for the cutoff parameter in the form factors at interaction vertices, we find that most cross sections are less than 1 mb, except the reactions $\\rho\\eta\\to K\\bar K^*(\\bar KK^*)$, $\\omega\\eta\\to K\\bar K^*(\\bar KK^*)$, $K^*\\eta\\to\\rho K$, and $K^*\\eta\\to\\omega K$, which are a few mb, and the reactions $\\pi\\eta\\to K\\bar K$ and $K\\eta\\to\\pi K$, which are more than 10 mb. Including these reactions in a kinetic model based on a schematic hydrodynamic description of relativistic heavy ion collisions, we find that the abundance of eta mesons likely reaches chemical equilibrium with other hadrons in nuclear collisions at the Relativistic Heavy Ion Collider.

W. Liu; C. M. Ko; L. W. Chen

2005-12-12T23:59:59.000Z

151

Building Distributed Energy Performance Optimization for China a Regional Analysis of Building Energy Costs and CO2 Emissions  

E-Print Network [OSTI]

photovoltaics (PV), and battery storage, are considered forFlow Battery Power Absorption Chiller Abs. Refrigeration PV

Feng, Wei

2013-01-01T23:59:59.000Z

152

Distributed Energy Resources for Carbon Emissions Mitigation  

E-Print Network [OSTI]

CHP investment. However, solar thermal collectors coupled to absorption chillers are an economic approach to energy cost

Firestone, Ryan; Marnay, Chris

2008-01-01T23:59:59.000Z

153

Microgrid modeling using the stochastic Distributed Energy Resources Customer Adoption Model DER-CAM  

E-Print Network [OSTI]

fuel cells, heat exchangers, PV, solar thermal, absorption chillers, stationary electric storage, and electric vehicles Cost optimization

Stadler, Michael

2014-01-01T23:59:59.000Z

154

Effect of Heat and Electricity Storage and Reliability on Microgrid Viability: A Study of Commercial Buildings in California and New York States  

E-Print Network [OSTI]

Solar thermal .DER available include solar thermal, photovoltaics (PV) and$/kW absorption chiller solar thermal photovoltaics Please

Stadler, Michael

2009-01-01T23:59:59.000Z

155

Nanolubricants to Improve Chiller Performance  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion | Department ofT ib l L d F S i DOEToward aInnovationHydrogenNRGA C T SofNanolubricants to

156

Absorption properties of identical atoms  

SciTech Connect (OSTI)

Emission rates and other optical properties of multi-particle systems in collective and entangled states differ from those in product ones. We show the existence of similar effects in the absorption probabilities for (anti)symmetrized states of two identical atoms. The effects strongly depend on the overlapping between the atoms and differ for bosons and fermions. We propose a viable experimental verification of these ideas. -- Highlights: •The absorption rates of a pair of identical atoms in product and (anti)symmetrized states are different. •The modifications of the optical properties are essentially determined by the overlapping between the atoms. •The absorption properties differ, in some cases, for bosons and fermions.

Sancho, Pedro, E-mail: psanchos@aemet.es

2013-09-15T23:59:59.000Z

157

Design and experimental testing of the performance of an outdoor LiBr/H{sub 2}O solar thermal absorption cooling system with a cold store  

SciTech Connect (OSTI)

A domestic-scale prototype experimental solar cooling system has been developed based on a LiBr/H{sub 2}O absorption system and tested during the 2007 summer and autumn months in Cardiff University, UK. The system consisted of a 12 m{sup 2} vacuum tube solar collector, a 4.5 kW LiBr/H{sub 2}O absorption chiller, a 1000 l cold storage tank and a 6 kW fan coil. The system performance, as well as the performances of the individual components in the system, were evaluated based on the physical measurements of the daily solar radiation, ambient temperature, inlet and outlet fluid temperatures, mass flow rates and electrical consumption by component. The average coefficient of thermal performance (COP) of the system was 0.58, based on the thermal cooling power output per unit of available thermal solar energy from the 12 m{sup 2} Thermomax DF100 vacuum tube collector on a hot sunny day with average peak insolation of 800 W/m{sup 2} (between 11 and 13.30 h) and ambient temperature of 24 C. The system produced an electrical COP of 3.6. Experimental results prove the feasibility of the new concept of cold store at this scale, with chilled water temperatures as low as 7.4 C, demonstrating its potential use in cooling domestic scale buildings. (author)

Agyenim, Francis; Knight, Ian; Rhodes, Michael [The Welsh School of Architecture, Bute Building, King Edward VII Avenue, Cardiff University, Cardiff, CF10 3NB Wales (United Kingdom)

2010-05-15T23:59:59.000Z

158

The Influence of Dust on the Absorptivity of Radiant Barriers  

E-Print Network [OSTI]

The purpose of this project was to model and quantify the increase of the absorptivity of radiant barriers caused by the accumulation of dust on the surface of radiant barriers. This research was the continuation of a previous work by the author...

Noboa, Homero L.

159

average specific absorption: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

average specific absorption First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Original Research Specific...

160

absorption rate sar: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption rate sar First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Original Research Specific...

Note: This page contains sample records for the topic "absorption chiller research" 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.


161

Transient absorption spectroscopy of laser shocked explosives  

SciTech Connect (OSTI)

Transient absorption spectra from 390-890 nm of laser shocked RDX, PETN, sapphire, and polyvinylnitrate (PVN) at sub-nanosecond time scales are reported. RDX shows a nearly linear increase in absorption with time after shock at {approx}23 GPa. PETN is similar, but with smaller total absorption. A broad visible absorption in sapphire begins nearly immediately upon shock loading but does not build over time. PVN exhibits thin film interference in the absorption spectra along with increased absorption with time. The absorptions in RDX and PETN are suggested to originate in chemical reactions happening on picosecond time scales at these shock stresses, although further diagnostics are required to prove this interpretation.

Mcgrane, Shawn D [Los Alamos National Laboratory; Dang, Nhan C [Los Alamos National Laboratory; Whitley, Von H [Los Alamos National Laboratory; Bolome, Cindy A [Los Alamos National Laboratory; Moore, D S [Los Alamos National Laboratory

2010-01-01T23:59:59.000Z

162

Quasistellar Objects: Intervening Absorption Lines  

E-Print Network [OSTI]

We briefly review, at a level appropriate for graduate students and non-specialists, the field of quasar absorption lines (QALs). Emphasis is on the intervening absorbers. We present the anatomy of a quasar spectrum due to various classes of intervening absorption systems, and a brief historical review of each absorber class (Lyman-alpha forest and Lyman limit systems, and metal-line and damped Lyman-alpha absorbers). We also provide several heuristic examples on how the physical properties of both the intergalactic medium and the gaseous environments associated with earlier epoch galaxies can be inferred from QALs. The evolution of these environments from z=4 are discussed.

Jane C. Charlton; Christopher W. Churchill

2000-05-31T23:59:59.000Z

163

Absorption-heat-pump system  

DOE Patents [OSTI]

An improvement in an absorption heat pump cycle is obtained by adding adiabatic absorption and desorption steps to the absorber and desorber of the system. The adiabatic processes make it possible to obtain the highest temperature in the absorber before any heat is removed from it and the lowest temperature in the desorber before heat is added to it, allowing for efficient utilization of the thermodynamic availability of the heat supply stream. The improved system can operate with a larger difference between high and low working fluid concentrations, less circulation losses, and more efficient heat exchange than a conventional system.

Grossman, G.; Perez-Blanco, H.

1983-06-16T23:59:59.000Z

164

Saturable absorption and 'slow light'  

E-Print Network [OSTI]

Quantitative evaluation of some recent 'slow light' experiments based on coherent population oscillations (CPO) shows that they can be more simply interpreted as saturable absorption phenomena. Therefore they do not provide an unambiguous demonstration of 'slow light'. Indeed a limiting condition on the spectral bandwidth is not generally satisfied, such that the requirements for burning a narrow spectral hole in the homogeneously broadened absorption line are not met. Some definitive tests of 'slow light' phenomena are suggested, derived from analysis of phase shift and pulse delay for a saturable absorber

Adrian C Selden

2006-03-25T23:59:59.000Z

165

New configurations of a heat recovery absorption heat pump integrated with a natural gas boiler for boiler efficiency improvement  

SciTech Connect (OSTI)

Conventional natural gas-fired boilers exhaust flue gas direct to the atmosphere at 150 200 C, which, at such temperatures, contains large amount of energy and results in relatively low thermal efficiency ranging from 70% to 80%. Although condensing boilers for recovering the heat in the flue gas have been developed over the past 40 years, their present market share is still less than 25%. The major reason for this relatively slow acceptance is the limited improvement in the thermal efficiency of condensing boilers. In the condensing boiler, the temperature of the hot water return at the range of 50 60 C, which is used to cool the flue gas, is very close to the dew point of the water vapor in the flue gas. Therefore, the latent heat, the majority of the waste heat in the flue gas, which is contained in the water vapor, cannot be recovered. This paper presents a new approach to improve boiler thermal efficiency by integrating absorption heat pumps with natural gas boilers for waste heat recovery (HRAHP). Three configurations of HRAHPs are introduced and discussed. The three configurations are modeled in detail to illustrate the significant thermal efficiency improvement they attain. Further, for conceptual proof and validation, an existing hot water-driven absorption chiller is operated as a heat pump at operating conditions similar to one of the devised configurations. An overall system performance and economic analysis are provided for decision-making and as evidence of the potential benefits. These three configurations of HRAHP provide a pathway to achieving realistic high-efficiency natural gas boilers for applications with process fluid return temperatures higher than or close to the dew point of the water vapor in the flue gas.

Qu, Ming [Purdue University, West Lafayette, IN; Abdelaziz, Omar [ORNL; Yin, Hongxi [Southeast University, Nanjing, China

2014-01-01T23:59:59.000Z

166

Transient Xray absorption features in GRBs 1 Transient XRay Absorption in GRBs  

E-Print Network [OSTI]

due to photoelectric absorption or other atomic processes.) The transient nature of the absorptionTransient X­ray absorption features in GRBs 1 Transient X­Ray Absorption in GRBs and its Abstract The recent detection of a transient absorption feature in the prompt emission of GRB 990705 has

Boettcher, Markus

167

Interferometric tunability of the absorption  

E-Print Network [OSTI]

We propose an interferometric setup that permits to tune the quantity of radiation absorbed by an object illuminated by a fixed light source. The method can be used to selectively irradiate portions of an object based on their transmissivities or to accurately estimate the transmissivities from rough absorption measurements.

Vittorio Giovannetti; Seth Lloyd; Lorenzo Maccone

2006-03-27T23:59:59.000Z

168

Nonlinear absorption in silicon nanocrystals  

SciTech Connect (OSTI)

The nonlinear absorption of light in silicon nanocrystals suspended in glycerol is studied by the Z-scan method. The experimental data are used for calculating the nonlinear absorption coefficient {beta}{sub Si-gl} for silicon nanocrystals in glycerol (with a volume filling factor f=2x10{sup -4}), and the coefficient {beta}{sub Si} for pure silicon with a hypothetical volume filling factor f{approx}1. For the laser radiation wavelength {lambda}=497 nm and the pulse duration {tau}=0.5 ns, these coefficients are {beta}{sub Si-gl}=1.2x10{sup -8} cm W{sup -1} and {beta}{sub Si} =7.36x10{sup -5} cm W{sup -1}, while the corresponding values for {lambda}=532 nm and {tau}=10 ns are {beta}{sub Si-gl}=5.36x10{sup -5} cm W{sup -1} and {beta}{sub Si} =0.25 cm W{sup -1}. Experiments with 540-nm, 20-ps laser pulses performed for two different filling factors equal to 2x10{sup -4} and 3x10{sup -3} gave nonlinear absorption coefficients {beta}{sub Si-gl}=2x10{sup -7} and 3.6x10{sup -6} cm W{sup -1}, respectively. Optical absorption and Raman scattering spectra of silicon nanocrystals are also studied. A theoretical analysis of the experimental results shows that optical absorption can be related to the localisation of photoexcited carriers in the conduction band. The localisation is caused by the action of strong static electric fields on an electron in a nanoparticle. (nonlinear optical phenomena)

Korovin, S B; Orlov, A N; Prokhorov, A M; Pustovoi, V I [Natural Science Center, A.M. Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation); Konstantaki, M; Couris, S; Koudoumas, E [Foundation for Research and Technology-Hellas (IESL-FORTH), Institute of Electronic Structure and Lasers, Crete (Greece)

2001-09-30T23:59:59.000Z

169

Value and Technology Assessment to Enhance the Business Case for the CERTS Microgrid  

E-Print Network [OSTI]

DER available include solar thermal, photovoltaics (PV) and1 absorption chiller solar thermal flow battery 220$/kWh andabsorption chiller (kW) Solar thermal (kW) PV (kW) lead-acid

Lasseter, Robert

2010-01-01T23:59:59.000Z

170

ENERGY AND GLOBAL WARMING IMPACTS OF NOT-IN-KIND AND NEXT GENERATION  

E-Print Network [OSTI]

......................................... xvi Adsorption Heat Pumps and Air Conditioners ............................. xvi Absorption Chillers .................................................. xvii Absorption Heat Pumps .............................................. xviii Magnetic Heat Pumps-IN-KIND TECHNOLOGIES ............................. ...... 9 ADSORPTION REFRIGERATION AND AIR CONDITIONING

Oak Ridge National Laboratory

171

DNA Concentration By UV Spectrophotometry Measure Absorption  

E-Print Network [OSTI]

DNA Concentration By UV Spectrophotometry Measure Absorption: 1. Dilute DNA to 0.5 to 50 µg 2. Measure absorption at 260 nm (A260). Start by zeroing instrument with TE buffer or dH2O alone

Aris, John P.

172

Energy Saving with Absorption Refrigeration Technologies  

E-Print Network [OSTI]

Absorption refrigeration technology can be an economical and cost effective means of reducing energy cost and/or improving the efficiency and output of your process. We believe the potential benefits of absorption refrigeration technology have...

Davis, R. C.

1984-01-01T23:59:59.000Z

173

Absorption properties of identical atoms  

E-Print Network [OSTI]

Emission rates and other optical properties of multiparticle systems in collective and entangled states differ from those in product ones. We show the existence of similar effects in the absorption probabilities for (anti)symmetrized states of two identical atoms. The effects strongly depend on the overlapping between the atoms and differ for bosons and fermions. We propose a viable experimental verification of these ideas.

Pedro Sancho

2013-07-31T23:59:59.000Z

174

Photodetector with enhanced light absorption  

DOE Patents [OSTI]

A photodetector including a light transmissive electrically conducting layer having a textured surface with a semiconductor body thereon. This layer traps incident light thereby enhancing the absorption of light by the semiconductor body. A photodetector comprising a textured light transmissive electrically conducting layer of SnO.sub.2 and a body of hydrogenated amorphous silicon has a conversion efficiency about fifty percent greater than that of comparative cells. The invention also includes a method of fabricating the photodetector of the invention.

Kane, James (Lawrenceville, NJ)

1985-01-01T23:59:59.000Z

175

Polymer microcantilevers fabricated via multiphoton absorption polymerization  

E-Print Network [OSTI]

Polymer microcantilevers fabricated via multiphoton absorption polymerization Z. Bayindir, Y. Sun February 2005 We have used multiphoton absorption polymerization to fabricate a series of microscale.1063/1.1863414 Multiphoton absorption polymerization MAP 1­4 offers the unparalleled ability to create arbitrarily complex 3D

Teich, Malvin C.

176

ALGEBRAIC ASPECTS OF EMISSION TOMOGRAPHY WITH ABSORPTION  

E-Print Network [OSTI]

ALGEBRAIC ASPECTS OF EMISSION TOMOGRAPHY WITH ABSORPTION L. Hajdu and R. Tijdeman Abstract of emission tomography with absorption, con- sider a ray (such as light or X-ray) transmitting through #1; e #22;x ; where #22; #21; 0 denotes the absorption coeĂ?cient of the material, and x is the length

Tijdeman, Robert

177

Visual Absorption Capability1 Lee Anderson  

E-Print Network [OSTI]

Visual Absorption Capability1 Lee Anderson 2a/ Jerry Mosier 2b/ Geoffrey Chandler 2c/ 1/ Submitted, Lassen National Forest, Susanville, California. Abstract: Visual absorption capability (VAC) is a tool development which is in harmony with the visual resource vis- ual absorption capability (VAC) is a tool which

Standiford, Richard B.

178

Absorption Coefficients and Impedance Daniel A. Russell  

E-Print Network [OSTI]

1 Absorption Coefficients and Impedance Daniel A. Russell Science and Mathematics Department will measure the absorption coefficients and acoustic impedance of samples of acoustic absorbing materials material is responsible for almost 50% of sound absorption inside an automobile). The reverberation time

Russell, Daniel A.

179

Discriminant Absorption Feature Learning for Material Classification  

E-Print Network [OSTI]

1 Discriminant Absorption Feature Learning for Material Classification Zhouyu Fu, Antonio Robles in spectral imaging by combining the use of invariant spectral absorption features and statistical machine learning techniques. Our method hinges in the relevance of spectral absorption features for material

Robles-Kelly, Antonio

180

Enhanced Absorption Induced by a Metallic Nanoshell  

E-Print Network [OSTI]

Enhanced Absorption Induced by a Metallic Nanoshell Roi Baer* Department of Physical Chemistry ABSTRACT Nanoshells have been previously shown to have tunable absorption frequencies that are dependent on the ratio of their inner and outer radii. Inspired by this, we ask: can a nanoshell increase the absorption

Baer, Roi

Note: This page contains sample records for the topic "absorption chiller research" 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

LIMITING ABSORPTION PRINCIPLE FOR SINGULARLY PERTURBED OPERATORS  

E-Print Network [OSTI]

LIMITING ABSORPTION PRINCIPLE FOR SINGULARLY PERTURBED OPERATORS WALTER RENGER Abstract. Given an operator H 1 for which a limiting absorption principle holds, we study operators H 2 which are produced that (except for possibly a discrete set of eigenvalues) a limiting absorption principle holds for H 2 . We

182

Original article Improvement of zinc intestinal absorption  

E-Print Network [OSTI]

Original article Improvement of zinc intestinal absorption and reduction of zinc/iron interaction of caseins, improves its absorption and could prevent inhibition by other nutrients such as iron (Fe). The absorption of Zn (100 Ilmol/L) bound to the 1-25 CN ((3-CN(1-25)) of (3-casein, or as ZnS04 was studied using

Boyer, Edmond

183

X-Ray Absorption Spectroscopy of Metallobiomolecules  

E-Print Network [OSTI]

2/9/07 1 X-Ray Absorption Spectroscopy of Metallobiomolecules The Outskirts of Structural Biology 9, 07] This is a tutorial about the use of X-ray Absorption Spectroscopy (XAS) in biology, RG; Eisenberger, P; Kincaid, BM "X-ray Absorption Spectroscopy of Biological Molecules" Annu. Rev

Scott, Robert A.

184

X-Ray Absorption Spectroscopy of Metallobiomolecules  

E-Print Network [OSTI]

9/6/09 1 X-Ray Absorption Spectroscopy of Metallobiomolecules The Outskirts of Structural Biology 6, 09] This is a tutorial about the use of X-ray Absorption Spectroscopy (XAS) in biology, RG; Eisenberger, P; Kincaid, BM "X-ray Absorption Spectroscopy of Biological Molecules" Annu. Rev

Scott, Robert A.

185

Absorption cross section in Lifshitz black hole  

E-Print Network [OSTI]

We derive the absorption cross section of a minimally coupled scalar in the Lifshitz black hole obtained from the new massive gravity. The absorption cross section reduces to the horizon area in the low energy and massless limit of s-wave mode propagation, indicating that the Lifshitz black hole also satisfies the universality of low energy absorption cross section for black holes.

Taeyoon Moon; Yun Soo Myung

2012-10-05T23:59:59.000Z

186

Salicylate Toxicity from Ingestion and Continued Dermal Absorption  

E-Print Network [OSTI]

of salicylate dermal absorption and toxicity. REFERENCESand Continued Dermal Absorption Rachel L. Chin, MD*, Kent R.bases in the percutaneous absorption of salicylates II. J

Chin, Rachel L; Olson, Kent R; Dempsey, Delia

2007-01-01T23:59:59.000Z

187

SENSITIVE OPTOACOUSTIC DETECTION OF CARBON MONOXIDE BY RESONANCE ABSORPTION  

E-Print Network [OSTI]

Monoxide by Resonance Absorption Robert Gerlach and Nabil M.MONOXIDE BY RESONANCE ABSORPTION Robert Gerlach and Nabil M.the context of atmospheric absorption. The carbon monoxide

Gerlach, R.

2011-01-01T23:59:59.000Z

188

Absorption of Foliar-Applied Nitrogen by Cotton  

E-Print Network [OSTI]

wax, and nitrogen-15 absorption. Crop Science 37:807-811.water- deficit stress, and the absorption of foliar-appliedgrowth favorable for N absorption and translocation. Four

Oosterhuis, Derrick M

2009-01-01T23:59:59.000Z

189

Energy absorption behaviors of nanoporous materials functionalized (NMF) liquids  

E-Print Network [OSTI]

of a nanoporous energy absorption system by using chemicalSurani, and Y. Qiao, "Energy absorption of nanoporous silicaSAN DIEGO Energy Absorption Behaviors of Nanoporous

Kim, Tae Wan

2011-01-01T23:59:59.000Z

190

High Energy Astrophysics: Emission and Absorption 1/114 Emission and Absorption  

E-Print Network [OSTI]

High Energy Astrophysics: Emission and Absorption 1/114 Emission and Absorption 1 Motivation and the jet. #12;High Energy Astrophysics: Emission and Absorption 2/114 HST optical image of 3C273 Note: Emission and Absorption 3/114 Set of 3 images of the jet of 3C273. Left: HST Middle: Chandra X-ray Right

Bicknell, Geoff

191

Terahertz absorption spectra of highly energetic chemicals E. J. Slingerlanda, M. K. Vallona, E. G. E. Jahngenb, R. H. Gilesa and T. M. Goyettea  

E-Print Network [OSTI]

Terahertz absorption spectra of highly energetic chemicals E. J. Slingerlanda, M. K. Vallona, E. G 01854 ABSTRACT Research into absorption spectra is useful for detecting chemicals in the field. Each theoretical models are available for predicting the absorption frequencies of a particular molecule

Massachusetts at Lowell, University of

192

GEOC Sunday, March 21, 2010 47 -Speciation and release kinetics of cadmium and zinc in paddy soils: Application of X-ray absorption  

E-Print Network [OSTI]

: Application of X-ray absorption spectroscopy (XAS) Saengdao Khaokaew, Rufus L Chaney, PhD Matt Ginder kinetics, which is the aim of this research. X-ray absorption spectroscopy (XAS) was used to investigate Cd-ray absorption fine structure (EXAFS) spectroscopic data indicates that CdCO3 and Cd-humic complexes

Sparks, Donald L.

193

Advanced regenerative absorption refrigeration cycles  

DOE Patents [OSTI]

Multi-effect regenerative absorption cycles which provide a high coefficient of performance (COP) at relatively high input temperatures. An absorber-coupled double-effect regenerative cycle (ADR cycle) (10) is provided having a single-effect absorption cycle (SEA cycle) (11) as a topping subcycle and a single-effect regenerative absorption cycle (1R cycle) (12) as a bottoming subcycle. The SEA cycle (11) includes a boiler (13), a condenser (21), an expansion device (28), an evaporator (31), and an absorber (40), all operatively connected together. The 1R cycle (12) includes a multistage boiler (48), a multi-stage resorber (51), a multisection regenerator (49) and also uses the condenser (21), expansion device (28) and evaporator (31) of the SEA topping subcycle (11), all operatively connected together. External heat is applied to the SEA boiler (13) for operation up to about 500 degrees F., with most of the high pressure vapor going to the condenser (21) and evaporator (31) being generated by the regenerator (49). The substantially adiabatic and isothermal functioning of the SER subcycle (12) provides a high COP. For higher input temperatures of up to 700 degrees F., another SEA cycle (111) is used as a topping subcycle, with the absorber (140) of the topping subcycle being heat coupled to the boiler (13) of an ADR cycle (10). The 1R cycle (12) itself is an improvement in that all resorber stages (50b-f) have a portion of their output pumped to boiling conduits (71a-f) through the regenerator (49), which conduits are connected to and at the same pressure as the highest pressure stage (48a) of the 1R multistage boiler (48).

Dao, Kim (14 Nace Ave., Piedmont, CA 94611)

1990-01-01T23:59:59.000Z

194

Formaldehyde Absorption toward W51  

SciTech Connect (OSTI)

We have measured formaldehyde (H{sub 2}CO) absorption toward the HII region complex W51A (G49.5-0.4) in the 6 cm and 2 cm wavelength rotational transitions with angular resolution of approximately 4 inch. The continuum HII region shows a large, previously undetected shell structure 5.5 pc along the major axis. We observe no H{sub 2}CO emission in regions of low continuum intensity. The absorption, converted to optical depth, shows a higher degree of clumping than previous maps at lower resolution. The good S/N of the maps allows accurate estimation of the complicated line profiles, showing some of the absorbing clouds to be quite patchy. We list the properties of the opacity spectra for a number of positions both in the clumps and in the more diffuse regions of the absorbing clouds, and derive column densities for the 1{sub 11} and 2{sub 12} rotational levels of ortho-formaldehyde.

Kogut, A.; Smoot, G.F.; Bennett, C.L.; Petuchowski, S.J.

1988-04-01T23:59:59.000Z

195

DEVELOPMENT OF SOLAR DRIVEN ABSORPTION AIR CONDITIONERS AND HEAT PUMPS  

E-Print Network [OSTI]

DRIVEN ABSORPTION AIR CONDITIONERS AND HEAT PUMPS K. Dao, M.ABSORPTION AIR CONDITIONERS AND HEAT PUMPS* K. DAO, M.

Dao, K.

2013-01-01T23:59:59.000Z

196

Effect of immersion chiller management and microbial intervention strategy on Salmonella or Campylobacter post-chill carcass incidence during commercial turkey processing  

E-Print Network [OSTI]

to thank everyone else who helped out during my research and throughout my years here at PHL. Now, down to Cain, Jack, Jan, Ruben, Koyle, Morgan, Jayson, Debbie, Jim Bob, Blair, Krissy, and Puddin, you kept me sane and helped to make the best friends... microbial intervention strategies for each independent processing facility involved in the investigation . . . . . 46 4 Plant 1: Chill Tank Measurements . 51 5 Plant 1: Bacterial Recovery. 53 6 Plant 2: Chill Tank Measurements . . . . . 55 7 Plant 2...

Cavitt, Justin Lee

2012-06-07T23:59:59.000Z

197

Silicate absorption in heavily obscured galaxy nuclei  

E-Print Network [OSTI]

Spectroscopy at 8-13 microns with T-ReCS on Gemini-S is presented for 3 galaxies with substantial silicate absorption features, NGC 3094, NGC 7172 and NGC 5506. In the galaxies with the deepest absorption bands, the silicate profile towards the nuclei is well represented by the emissivity function derived from the circumstellar emission from the red supergiant, mu Cephei which is also representative of the mid-infrared absorption in the diffuse interstellar medium in the Galaxy. There is spectral structure near 11.2 microns in NGC 3094 which may be due to a component of crystalline silicates. In NGC 5506, the depth of the silicate absorption increases from north to south across the nucleus, suggestive of a dusty structure on scales of 10s of parsecs. We discuss the profile of the silicate absorption band towards galaxy nuclei and the relationship between the 9.7 micron silicate and 3.4 micron hydrocarbon absorption bands.

P. F. Roche; C. Packham; D. K. Aitken; R. E. Mason

2006-10-19T23:59:59.000Z

198

Olefin recovery via chemical absorption  

SciTech Connect (OSTI)

The recovery of fight olefins in petrochemical plants has generally been accomplished through cryogenic distillation, a process which is very capital and energy intensive. In an effort to simplify the recovery process and reduce its cost, BP Chemicals has developed a chemical absorption technology based on an aqueous silver nitrate solution. Stone & Webster is now marketing, licensing, and engineering the technology. The process is commercially ready for recovering olefins from olefin derivative plant vent gases, such as vents from polyethylene, polypropylene, ethylene oxide, and synthetic ethanol units. The process can also be used to debottleneck C{sub 2} or C{sub 3} splinters, or to improve olefin product purity. This paper presents the olefin recovery imp technology, discusses its applications, and presents economics for the recovery of ethylene and propylene.

Barchas, R. [Stone & Webster Engineering Corporation, Houston, TX (United States)

1998-06-01T23:59:59.000Z

199

Fred Hutchinson Cancer Research Center, Seattle, Washington: Laboratories for the 21st Century Case Studies (Revision)  

SciTech Connect (OSTI)

This case study was prepared by participants in the Laboratories for the 21st Century program, a joint endeavor of the U.S. Environmental Protection Agency and the U.S. Department of Energy's Federal Energy Management Program. The goal of this program is to foster greater energy efficiency in new laboratory buildings for both the public and the private sectors. Retrofits of existing laboratories are also encouraged. The energy-efficient features of the laboratories in the Fred Hutchinson Cancer Research Center complex in Seattle, Washington, include extensive use of efficient lighting, variable-air-volume controls, variable-speed drives, motion sensors, and high-efficiency chillers and motors. With about 532,000 gross square feet, the complex is estimated to use 33% less electrical energy than most traditional research facilities consume because of its energy-efficient design and features.

Not Available

2002-03-01T23:59:59.000Z

200

Fred Hutchinson Cancer Research Center, Seattle, Washington: Laboratories for the 21st Century Case Studies  

SciTech Connect (OSTI)

This case study was prepared by participants in the Laboratories for the 21st Century program, a joint endeavor of the U.S. Environmental Protection Agency and the U.S. Department of Energy's Federal Energy Management Program. The goal of this program is to foster greater energy efficiency in new laboratory buildings for both the public and the private sectors. Retrofits of existing laboratories are also encouraged. The energy-efficient features of the laboratories in the Fred Hutchinson Cancer Research Center complex in Seattle, Washington, include extensive use of efficient lighting, variable-air-volume controls, variable-speed drives, motion sensors, and high-efficiency chillers and motors. With about 532,000 gross square feet, the complex is estimated to use 33% less electrical energy than most traditional research facilities consume because of its energy-efficient design and features.

Not Available

2001-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "absorption chiller research" 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

Direct and quantitative absorptive spectroscopy of nanowires  

E-Print Network [OSTI]

Photonic nanostructures exhibit unique optical properties that are attractive in many different applications. However, measuring the optical properties of individual nanostructures, in particular the absorptive properties, ...

Tong, Jonathan Kien-Kwok

2012-01-01T23:59:59.000Z

202

Combining Feedback Absorption Spectroscopy, Amplified Resonance...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

On-Board Measurement of Ammonia and Nitrous Oxide Using Feedback Absorption Laser Spectroscopy Combined with Amplified Resonance and Low Pressure Sampling Cummins...

203

Perfect and broadband acoustic absorption by critical coupling  

E-Print Network [OSTI]

We experimentally and analytically report broadband and narrowband perfect absorption in two different acoustic waveguide-resonator geometries by the mechanism of critical coupling. In the first geometry the resonator (a Helmholtz resonator) is side-loaded to the waveguide and it has a moderate quality factor. In the second geometry the resonator (a viscoelastic porous plate) is in-line loaded and it contains two resonant modes with low quality factor. The interplay between the energy leakage of the resonant modes into the waveguide and the inherent losses of the system reveals a perfect and a broadband nearly perfect absorption. The results shown in this work can motivate relevant research for the design of broadband perfect absorbers in other domains of wave physics.

Romero-García, V; Richoux, O; Merkel, A; Tournat, V; Pagneux, V

2015-01-01T23:59:59.000Z

204

Broadband solar absorption enhancement via periodic  

E-Print Network [OSTI]

Province, 230009, P. R. China. Solution processed colloidal quantum dot (CQD) solar cells have greatBroadband solar absorption enhancement via periodic nanostructuring of electrodes Michael M. Adachi demonstrate a bottom- illuminated periodic nanostructured CQD solar cell that enhances broadband absorption

205

Lyman-alpha Absorption from Heliosheath Neutrals  

E-Print Network [OSTI]

We assess what information HST observations of stellar Ly-alpha lines can provide on the heliosheath, the region of the heliosphere between the termination shock and heliopause. To search for evidence of heliosheath absorption, we conduct a systematic inspection of stellar Ly-alpha lines reconstructed after correcting for ISM absorption (and heliospheric/astrospheric absorption, if present). Most of the stellar lines are well centered on the stellar radial velocity, as expected, but the three lines of sight with the most downwind orientations relative to the ISM flow (Chi1 Ori, HD 28205, and HD 28568) have significantly blueshifted Ly-alpha lines. Since it is in downwind directions where heliosheath absorption should be strongest, the blueshifts are almost certainly caused by previously undetected heliosheath absorption. We make an initial comparison between the heliosheath absorption and the predictions of a pair of heliospheric models. A model with a complex multi-component treatment of plasma within the heliosphere predicts less absorption than a model with a simple single-fluid treatment, which leads to better agreement with the data. Finally, we find that nonplanetary energetic neutral atom (ENA) fluxes measured by the ASPERA-3 instrument on board Mars Express, which have been interpreted as being from the heliosheath, are probably too high to be consistent with the relative lack of heliosheath absorption seen by HST. This would argue for a local interplanetary source for these ENAs instead of a heliosheath source.

Brian E. Wood; Vladislav V. Izmodenov; Jeffrey L. Linsky; Yury G. Malama

2006-11-30T23:59:59.000Z

206

Modeling of Solar-Powered Single-Effect Absorption Cooling System and Supermarket Refrigeration/HVAC System.  

E-Print Network [OSTI]

??This thesis consists of two different research problems. In the first one, the aim is to model and simulate a solar-powered, single-effect, absorption refrigeration system… (more)

Bahman, Ammar

2011-01-01T23:59:59.000Z

207

Modeling of Solar-Powered Single-Effect Absorption Cooling System and Supermarket Refrigeration/HVAC System.  

E-Print Network [OSTI]

?? This thesis consists of two different research problems. In the first one, the aim is to model and simulate a solar-powered, single-effect, absorption refrigeration… (more)

Bahman, Ammar Mohammad Khalil

2011-01-01T23:59:59.000Z

208

Absorption and Scattering When we have both variations in both absorption and scattering, the solution to the  

E-Print Network [OSTI]

Chapter 6 Absorption and Scattering When we have both variations in both absorption and scattering of absorption and scatttering. 6.1 Simulation Results For the following simulationsthe forward data were of the simulation. #12;Absorption and Scattering 107 We have reconstructed images of scattering and absorption

209

Total absorption by degenerate critical coupling  

SciTech Connect (OSTI)

We consider a mirror-symmetric resonator with two ports. We show that, when excited from a single port, complete absorption can be achieved through critical coupling to degenerate resonances with opposite symmetry. Moreover, any time two resonances with opposite symmetry are degenerate in frequency and absorption is always significantly enhanced. In contrast, when two resonances with the same symmetry are nearly degenerate, there is no absorption enhancement. We numerically demonstrate these effects using a graphene monolayer on top of a photonic crystal slab, illuminated from a single side in the near-infrared.

Piper, Jessica R., E-mail: jrylan@stanford.edu; Liu, Victor; Fan, Shanhui, E-mail: shanhui@stanford.edu [Ginzton Laboratory, Department of Electrical Engineering, Stanford University, Stanford, California 94305 (United States)

2014-06-23T23:59:59.000Z

210

Hyperfine Studies of Lithium Vapor using Saturated Absorption Spectroscopy  

E-Print Network [OSTI]

the frequency of a laser with respect to an atomic spectral feature.[20] As such, saturated absorptionHyperfine Studies of Lithium Vapor using Saturated Absorption Spectroscopy? . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 3.3 Broadening Mechanisms . . . . . . . . . . . . . . . . . . . . . 15 3.4 Saturated Absorption

Cronin, Alex D.

211

X-ray Absorption Spectroscopy of Biologically Relevant Systems  

E-Print Network [OSTI]

308, Messer, B. M. X-ray Absorption Spectroscopy of AqueousSarcosine via X-ray Absorption Spectroscopy 5.1 Introductionwith Carboxylate by X-Ray Absorption Spectroscopy of Liquid

Uejio, Janel Sunayo

2010-01-01T23:59:59.000Z

212

THE RELATION OF BACKSCATTERING TO SELF-ABSORPTION  

E-Print Network [OSTI]

of backscattering upon salf-absorption correction data, somemg/cm I Figure 1. Self-absorption Correction Curves forof backsc3ttering upon self-absorption correction curves are

Yankwich, Peter E.

2010-01-01T23:59:59.000Z

213

Solar absorption by Mie resonances in cloud droplets  

E-Print Network [OSTI]

on the enhancement factor for absorption of light by carbonKlett JD. Black carbon and absorption of solar radiation bySize parameter; Particle absorption; Water clouds; Aerosols

Zender, Charles S; Talamantes, Jorge

2006-01-01T23:59:59.000Z

214

DEVELOPMENT OF SOLAR DRIVEN ABSORPTION AIR CONDITIONERS AND HEAT PUMPS  

E-Print Network [OSTI]

SOLAR DRIVEN ABSORPTION AIR CONDITIONERS AND HEAT PUMPS K.Driven Absorption Air-Conditioner", K. Dao, M. Simmons, R.SOLAR DRIVEN ABSORPTION AIR CONDITIONERS AND HEAT PUMPS* K.

Dao, K.

2013-01-01T23:59:59.000Z

215

Infrared absorption spectroscopy and chemical kinetics of free radicals  

SciTech Connect (OSTI)

This research is directed at the detection, monitoring, and study of chemical kinetic behavior by infrared absorption spectroscopy of small free radical species thought to be important intermediates in combustion. During the last year, infrared kinetic spectroscopy using excimer laser flash photolysis and color-center laser probing has been employed to study the high resolution spectrum of HCCN, the rate constant of the reaction between ethynyl (C{sub 2}H) radical and H{sub 2} in the temperature region between 295 and 875 K, and the recombination rate of propargyl (CH{sub 2}CCH) at room temperature.

Curl, R.F.; Glass, G.P. [Rice Univ., Houston, TX (United States)

1993-12-01T23:59:59.000Z

216

Absorption Heat Pumping- Have You Tried It?  

E-Print Network [OSTI]

The concept of a thermal powered absorption heat pump is not a new or revolutionary idea. It has been successfully demonstrated in the lab and prototypes have been installed in the field. Units have been successfully applied in a number...

Davis, R. C.

217

Visible spectrometer utilizing organic thin film absorption  

E-Print Network [OSTI]

In this thesis, I modeled and developed a spectrometer for the visible wavelength spectrum, based on absorption characteristics of organic thin films. The device uses fundamental principles of linear algebra to reconstruct ...

Tiefenbruck, Laura C. (Laura Christine)

2004-01-01T23:59:59.000Z

218

Absorptive Recycle of Distillation Waste Heat  

E-Print Network [OSTI]

condenser operates above ambient temperature, the rejected heat also contains unused availability. By incorporating an absorption heat pump (AHP) into the distillation process, these sources of unused availability can be tapped so as to recycle (and hence...

Erickson, D. C.; Lutz, E. J., Jr.

1982-01-01T23:59:59.000Z

219

Crown structure, radiation absorption, photosynthesis and transpiration   

E-Print Network [OSTI]

. Among the four different structural properties studied, crown shape is least important for PAR absorption, photosynthesis and transpiration. For the Sitka spruce stand studied, transpiration was most sensitive to the total area of leaves within the tree...

Wang, Yingping

220

Absorption cross section of RN black hole  

E-Print Network [OSTI]

The behavior of a charged scalar field in the RN black hole space time is studied using WKB approximation. In the present work it is assumed that matter waves can get reflected from the event horizon. Using this effect, the Hawking temperature and the absorption cross section for RN black hole placed in a charged scalar field are calculated. The absorption cross section $\\sigma _{abs}$ is found to be inversely proportional to square of the Hawking temperature of the black hole.

Sini R.; V. C. Kuriakose

2007-08-23T23:59:59.000Z

Note: This page contains sample records for the topic "absorption chiller research" 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

Reduction in biomass burning aerosol light absorption upon humidificat...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

in biomass burning aerosol light absorption upon humidification: Roles of inorganically-induced hygroscopicity, Reduction in biomass burning aerosol light absorption upon...

222

acoustic power absorption: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

The distribution of acoustic power over sunspots shows an enhanced absorption near the umbra--penumbra boundary. Earlier studies revealed that the region of enhanced absorption...

223

E-Print Network 3.0 - absorption spectrometry configurations...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Trace Elements in Biological Tissues by Summary: Block Digestion and Spike-Height Flame Atomic Absorption Spectrometry ,.. U. TINGGI AND W. MAHER School... absorption...

224

Self-corrected Sensors Based On Atomic Absorption Spectroscopy...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

corrected Sensors Based On Atomic Absorption Spectroscopy For Atom Flux Measurements In Molecular Beam Epitaxy. Self-corrected Sensors Based On Atomic Absorption Spectroscopy For...

225

E-Print Network 3.0 - absorption spectrometry analyticalmethod...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Trace Elements in Biological Tissues by Summary: Block Digestion and Spike-Height Flame Atomic Absorption Spectrometry ,.. U. TINGGI AND W. MAHER School... absorption...

226

The Future of Absorption Technology in America: A Critical Look...  

Broader source: Energy.gov (indexed) [DOE]

The Future of Absorption Technology in America: A Critical Look at the Impact of Building, Cooling, Heating, and Power (BCHP) and Innovation, June 2000 The Future of Absorption...

227

Charge Resonance Effects on Electronic Absorption Line Shapes: Application to the Heterodimer Absorption of Bacterial Photosynthetic Reaction Centers  

E-Print Network [OSTI]

to the formalism of Fano's treatment for atomic absorption line shapes associated with autoionization (Fano, UCharge Resonance Effects on Electronic Absorption Line Shapes: Application to the Heterodimer Absorption of Bacterial Photosynthetic Reaction Centers Huilin Zhou and Steven G. Boxer* Department

Boxer, Steven G.

228

Resonant absorption and not-so-resonant absorption in short, intense laser irradiated plasma  

SciTech Connect (OSTI)

An analytical model for laser-plasma interaction during the oblique incidence by an ultrashort ultraintense p-polarized laser on a solid-density plasma is proposed. Both the resonant absorption and not-so-resonant absorption are self-consistently included. Different from the previous theoretical works, the physics of resonant absorption is found to be valid in more general conditions as the steepening of the electron density profile is considered. Even for a relativistic intensity laser, resonant absorption can still exist under certain plasma scale length. For shorter plasma scale length or higher laser intensity, the not-so-resonant absorption tends to be dominant, since the electron density is steepened to a critical level by the ponderomotive force. The laser energy absorption rates for both mechanisms are discussed in detail, and the difference and transition between these two mechanisms are presented.

Ge, Z. Y.; Zhuo, H. B.; Ma, Y. Y.; Yang, X. H.; Yu, T. P.; Zou, D. B.; Yin, Y.; Shao, F. Q. [College of Science, National University of Defense Technology, Changsha 410073 (China)] [College of Science, National University of Defense Technology, Changsha 410073 (China); Yu, W.; Luan, S. X. [Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800 (China)] [Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800 (China); Zhou, C. T. [College of Science, National University of Defense Technology, Changsha 410073 (China) [College of Science, National University of Defense Technology, Changsha 410073 (China); Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China); Peng, X. J. [Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China)] [Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China)

2013-07-15T23:59:59.000Z

229

Testing a Prototype Adsorption Cooler in a Research Dwelling  

E-Print Network [OSTI]

Cooling with heat is hot. Demand for cooling often coincides with the supply of solar heat. This makes thermally driven chillers (TDC's) in combination with solar collectors interesting for improving the energy efficiency of comfort cooling. Several...

Sijpheer, N.; Bakker, E.J.; De Boer, R.

2010-01-01T23:59:59.000Z

230

Report to Congress on Server and Data Center Energy Efficiency: Public Law 109-431  

E-Print Network [OSTI]

absorption chiller. High-temperature hot water near or above17,000 Btu of high-temperature hot water or low-pressure

Brown, Richard; Alliance to Save Energy; ICF Incorporated; ERG Incorporated; U.S. Environmental Protection Agency

2008-01-01T23:59:59.000Z

231

Distributed Energy Resources On-Site Optimization for Commercial Buildings with Electric and Thermal Storage Technologies  

E-Print Network [OSTI]

photovoltaics and solar thermal collectors; electricalfor application of solar thermal and recovered heat to end-absorption chiller solar thermal photovoltaics Results

Stadler, Michael

2008-01-01T23:59:59.000Z

232

NETL F 451.1-1/1 Categorical Exclusion (CX) Designation Form  

Broader source: Energy.gov (indexed) [DOE]

hardware in 2 buildings (civic center & police facility) to evaluate solar thermal absorption chillers, adv. lighting, & energy management systems. 09 17 2010 Ryan Watson...

233

Field Scale Test and Verification of CHP System at the Ritz Carlton...  

Broader source: Energy.gov (indexed) [DOE]

resulting packaged CHP System which integrated four microturbines, a double-effect absorption chiller, two fuel gas boosters, and the control hardware and software to ensure that...

234

REQUEST BY UTC POWER, FOR AN ADVANCE WAIVER OF DOMESTIC AND  

Broader source: Energy.gov (indexed) [DOE]

to permit qualification and launch of the integrated microturbine, waste-heat driven absorption chiller product that will be demonstrated in a new application in the proposed...

235

CX-003942: Categorical Exclusion Determination | Department of...  

Broader source: Energy.gov (indexed) [DOE]

hardware in 2 buildings (civic center and police facility) to evaluate solar thermal absorption chillers, advanced lighting, and energy management systems. DOCUMENT(S) AVAILABLE...

236

List of Chillers Incentives | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revision hasInformation Earth's Heat JumpInc Place:KeystoneSolar (Texas) JumpEventBoilersCeiling

237

Automated Centrifugal Chiller Diagnostician - Energy Innovation Portal  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD)ProductssondeadjustsondeadjustAboutScience Program Cumulus Humilis, 2014Automated Algorithm for

238

Quantifying the Magnitude of Anomalous Solar Absorption  

SciTech Connect (OSTI)

The data set from ARESE II, sponsored by the Atmospheric Radiation Measurement Program, provides a unique opportunity to understand solar absorption in the atmosphere because of the combination of three sets of broadband solar radiometers mounted on the Twin Otter aircraft and the ground based instruments at the ARM Southern Great Plains facility. In this study, we analyze the measurements taken on two clear sky days and three cloudy days and model the solar radiative transfer in each case with two different models. On the two clear days, the calculated and measured column absorptions agree to better than 10 Wm-2, which is about 10% of the total column absorption. Because both the model fluxes and the individual radiometer measurements are accurate to no better than 10 Wm-2, we conclude that the models and measurements are essentially in agreement. For the three cloudy days, the model calculations agree very well with each other and on two of the three days agree with the measurements to 20 Wm-2 or less out of a total column absorption of more than 200 Wm-2, which is again agreement at better than 10%. On the third day, the model and measurements agree to either 8% or 14% depending on which value of surface albedo is used. Differences exceeding 10% represent a significant absorption difference between model and observations. In addition to the uncertainty in absorption due to surface albedo, we show that including aerosol with an optical depth similar to that found on clear days can reduce the difference between model and measurement by 5% or more. Thus, we conclude that the ARESE II results are incompatible with previous studies reporting extreme anomalous absorption and can be modeled with our current understanding of radiative transfer.

Ackerman, Thomas P.; Flynn, Donna M.; Marchand, Roger T.

2003-05-16T23:59:59.000Z

239

DIPARTIMENTO DI INGEGNERIA  

E-Print Network [OSTI]

are then developed for the most relevant faults affecting chillers. To this aim, data collected in the research-cooled chiller in order to collect data in both normal and faulty situations. The developed technique is based

Schenato, Luca

240

High redshift star-forming galaxies in absorption and emission  

E-Print Network [OSTI]

-forming galaxies in the redshift range 1 emission filling of absorption lines which has implications...

Quider, Anna Marie

2011-07-12T23:59:59.000Z

Note: This page contains sample records for the topic "absorption chiller research" 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

Nitrogen Dioxide Absorption and Sulfite Oxidation in Aqueous Sulfite  

E-Print Network [OSTI]

Nitrogen Dioxide Absorption and Sulfite Oxidation in Aqueous Sulfite C H E N H . S H E N A N D G by absorption in sulfite solution in existing scrubbers for desulfurization. Rates of NO2 absorption and sulfite absorption initiates sulfite oxidation in the presence of oxygen, and this study quantified the effect

Rochelle, Gary T.

242

X-ray bandwidth: Determination by on-edge absorption and effect on various absorption experiments  

E-Print Network [OSTI]

X-ray bandwidth: Determination by on-edge absorption and effect on various absorption experiments of an x-ray source is increasingly important in fundamental experi- ments and critical applications. The bandwidth of an x-ray beam, selected from a synchrotron radiation spectrum for example, ultimately defines

Chantler, Christopher T.

243

Atomic and Molecular Absorption at High Redshift  

E-Print Network [OSTI]

Strong constraints on possible variations in fundamental constants can be derived from HI 21-cm and molecular rotational absorption lines observed towards quasars. With the aim of forming a statistical sample of constraints we have begun a program of systematic searches for such absorption systems. Here we describe molecular rotational searches in 25 damped Lyman-alpha systems where, in many cases, we set optical depth limits an order of magnitude better than that required to detect the 4 known redshifted millimeter-wave absorbers. We also discuss the contributory factors in the detectability of HI 21-cm absorption, focusing on possible biases (e.g.low covering factors) in the currently known sample of absorbers and non-detections.

S. J. Curran; J. K. Webb; M. T. Murphy; Y. M. Pihlström

2004-05-14T23:59:59.000Z

244

Plasmon absorption modulator systems and methods  

SciTech Connect (OSTI)

Plasmon absorption modulator systems and methods are disclosed. A plasmon absorption modulator system includes a semiconductor substrate, a plurality of quantum well layers stacked on a top surface of the semiconductor substrate, and a metal layer formed on a top surface of the stack of quantum well layers. A method for modulating plasmonic current includes enabling propagation of the plasmonic current along a metal layer, and applying a voltage across the stack of quantum well layers to cause absorption of a portion of energy of the plasmonic current by the stack of quantum well layers. A metamaterial switching system includes a semiconductor substrate, a plurality of quantum well layers stacked on a top surface of the semiconductor substrate, and at least one metamaterial structure formed on a top surface of the stack of quantum well layers.

Kekatpure, Rohan Deodatta; Davids, Paul

2014-07-15T23:59:59.000Z

245

Absolute absorption spectroscopy based on molecule interferometry  

E-Print Network [OSTI]

We propose a new method to measure the absolute photon absorption cross section of neutral molecules in a molecular beam. It is independent of our knowledge of the particle beam density, nor does it rely on photo-induced fragmentation or ionization. The method is based on resolving the recoil resulting from photon absorption by means of near-field matter-wave interference, and it thus applies even to very dilute beams with low optical densities. Our discussion includes the possibility of internal state conversion as well as fluorescence. We assess the influence of various experimental uncertainties and show that the measurement of absolute absorption cross sections is conceivable with high precision and using existing technologies.

Stefan Nimmrichter; Klaus Hornberger; Hendrik Ulbricht; Markus Arndt

2008-11-07T23:59:59.000Z

246

Potassium emission absorption system. Topical report 12  

SciTech Connect (OSTI)

The Potassium Emission Absorption System is one of the advanced optical diagnostics developed at Mississippi State University to provide support for the demonstration of prototype-scale coal-fired combustion magnetohydrodynamic (MHD) electrical power generation. Intended for application in the upstream of an MHD flow, the system directly measures gas temperature and neutral potassium atom number density through spectroscopic emission absorption techniques. From these measurements the electron density can be inferred from a statistical equilibrium calculation and the electron conductivity in the MHD channel found by use of an electron mobility model. The instrument has been utilized for field test measurements on MHD facilities for almost a decade and has been proven to provide useful measurements as designed for MHD nozzle, channel, and diffuser test sections. The theory of the measurements, a system description, its capabilities, and field test measurement results are reported here. During the development and application of the instrument several technical issues arose which when addressed advanced the state of the art in emission absorption measurement. Studies of these issues are also reported here and include: two-wavelength measurements for particle-laden flows, potassium D-line far wing absorption coefficient, bias in emission absorption measurements arising from dirty windows and misalignments, non-coincident multiwavelength emission absorption sampling errors, and lineshape fitting for boundary layer flow profile information. Although developed for NLHD application, the instrument could be applied to any high temperature flow with a resonance line in the 300 to 800 nm range, for instance other types of flames, rocket plumes or low temperature plasmas.

Bauman, L.E.

1995-04-01T23:59:59.000Z

247

Laser isotope separation by multiple photon absorption  

DOE Patents [OSTI]

Multiple photon absorption from an intense beam of infrared laser light may be used to induce selective chemical reactions in molecular species which result in isotope separation or enrichment. The molecular species must have a sufficient density of vibrational states in its vibrational manifold that, is the presence of sufficiently intense infrared laser light tuned to selectively excite only those molecules containing a particular isotope, multiple photon absorption can occur. By this technique, for example, intense CO[sub 2] laser light may be used to highly enrich [sup 34]S in natural SF[sub 6] and [sup 11]B in natural BCl[sub 3]. 8 figs.

Robinson, C.P.; Rockwood, S.D.; Jensen, R.J.; Lyman, J.L.; Aldridge, J.P. III.

1987-04-07T23:59:59.000Z

248

Laser isotope separation by multiple photon absorption  

DOE Patents [OSTI]

Multiple photon absorption from an intense beam of infrared laser light may be used to induce selective chemical reactions in molecular species which result in isotope separation or enrichment. The molecular species must have a sufficient density of vibrational states in its vibrational manifold that, is the presence of sufficiently intense infrared laser light tuned to selectively excite only those molecules containing a particular isotope, multiple photon absorption can occur. By this technique, for example, intense CO.sub.2 laser light may be used to highly enrich .sup.34 S in natural SF.sub.6 and .sup.11 B in natural BCl.sub.3.

Robinson, C. Paul (Los Alamos, NM); Rockwood, Stephen D. (Los Alamos, NM); Jensen, Reed J. (Los Alamos, NM); Lyman, John L. (Los Alamos, NM); Aldridge, III, Jack P. (Los Alamos, NM)

1987-01-01T23:59:59.000Z

249

The 4000 A absorption system of formaldehyde  

E-Print Network [OSTI]

THE $000 A ABSORPTION SYSTEM OF FORMALDEHYDE JAMES RALPH HENDERSON A Thesis Submitted to the Graduate School of the Agricultural and Mechanical College of Texas in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE... May i 1957 Ma]or Subject: Physics THE 4000 A ABSORPTION SYSTEM OF FORMALDEHYDE A Thesis JAMES RALPH HENDERSON Approved as to style and content bye rlllan 0 OIllK e e ea o epar men May, l957 TABLE OF CONTENTS Page I. Introduction...

Henderson, James Ralph

1957-01-01T23:59:59.000Z

250

Multi-plasmon absorption in graphene  

E-Print Network [OSTI]

We show that graphene possesses a strong nonlinear optical response in the form of multi-plasmon absorption, with exciting implications in classical and quantum nonlinear optics. Specifically, we predict that graphene nano-ribbons can be used as saturable absorbers with low saturation intensity in the far-infrared and terahertz spectrum. Moreover, we predict that two-plasmon absorption and extreme localization of plasmon fields in graphene nano-disks can lead to a plasmon blockade effect, in which a single quantized plasmon strongly suppresses the possibility of exciting a second plasmon.

Marinko Jablan; Darrick E. Chang

2015-01-21T23:59:59.000Z

251

Modified discrete random walk with absorption  

E-Print Network [OSTI]

We obtain expected number of arrivals, probability of arrival, absorption probabilities and expected time before absorption for a modified discrete random walk on the (sub)set of integers. In a [pqrs] random walk the particle can move one step forward or backward, stay for a moment in the same state or it can be absorbed immediately in the current state. M[pqrs] is a modified version, where probabilities on both sides of a multiple function barrier M are of different [pqrs] type.

Theo van Uem

2009-03-02T23:59:59.000Z

252

Anomalous Light Absorption by Small Particles  

E-Print Network [OSTI]

A new type of resonant light absorption by a small particle (nanocluster) is reported. The problem cannot be described within the commonly used dipole scattering approximation and should be studied with methods based upon the exact Mie solution. It is shown that the absorption cross-section has giant maxima realized at small values of the imaginary part of the complex dielectric permittivity of the particle. The maxima are situated in the vicinity of the plasmon (polariton) resonances and correspond to the regions where the dissipative damping equals the radiative one. The case is similar to the recently introduced anomalous scattering [PRL vol. 97, 263902 (2006)] and exhibits similar peculiarities.

Michael I. Tribelsky

2009-12-18T23:59:59.000Z

253

COMBUSTION RESEARCH - FY-1979  

E-Print Network [OSTI]

Products by Zeeman Atomic Absorption Spectroscopy E. Cuellarand R. McLaughlin, "Zeeman atomic absorption spectrometry,"to be used is Zeeman Atomic Absorption Spectroscopy (ZAA)

,

2012-01-01T23:59:59.000Z

254

Absorption: an update In the Netherlands, a residential ab-is being incorporated now. As a conse-cepts prove to be economically viable, ab-  

E-Print Network [OSTI]

. As a conse- cepts prove to be economically viable, ab- sorption heat pump isunder development quence Aachen. Computer models for the design research and development work on ab- tele Absorption Heat Pump and Performance of systems and the results indicate that we a High Temperature-Boost Absorption Heat Pump

Oak Ridge National Laboratory

255

Harmonic wavelet analysis of modulated tunable diode laser absorption spectroscopy signals  

E-Print Network [OSTI]

of the direct absorption characteristics of atomic or molecular absorption lines. This is accomplishedHarmonic wavelet analysis of modulated tunable diode laser absorption spectroscopy signals Hong analyses of tunable diode laser absorption spectroscopy signals were performed. The absorption spectroscopy

Cheng, Harry H.

256

Corrosion inhibitor for aqueous ammonia absorption system  

DOE Patents [OSTI]

A method of inhibiting corrosion and the formation of hydrogen and thus improving absorption in an ammonia/water absorption refrigeration, air conditioning or heat pump system by maintaining the hydroxyl ion concentration of the aqueous ammonia working fluid within a selected range under anaerobic conditions at temperatures up to 425.degree. F. This hydroxyl ion concentration is maintained by introducing to the aqueous ammonia working fluid an inhibitor in an amount effective to produce a hydroxyl ion concentration corresponding to a normality of the inhibitor relative to the water content ranging from about 0.015 N to about 0.2 N at 25.degree. C. Also, working fluids for inhibiting the corrosion of carbon steel and resulting hydrogen formation and improving absorption in an ammonia/water absorption system under anaerobic conditions at up to 425.degree. F. The working fluids may be aqueous solutions of ammonia and a strong base or aqueous solutions of ammonia, a strong base, and a specified buffer.

Phillips, Benjamin A. (Benton Harbor, MI); Whitlow, Eugene P. (St. Joseph, MI)

1998-09-22T23:59:59.000Z

257

Corrosion inhibitor for aqueous ammonia absorption system  

DOE Patents [OSTI]

A method is described for inhibiting corrosion and the formation of hydrogen and thus improving absorption in an ammonia/water absorption refrigeration, air conditioning or heat pump system by maintaining the hydroxyl ion concentration of the aqueous ammonia working fluid within a selected range under anaerobic conditions at temperatures up to 425 F. This hydroxyl ion concentration is maintained by introducing to the aqueous ammonia working fluid an inhibitor in an amount effective to produce a hydroxyl ion concentration corresponding to a normality of the inhibitor relative to the water content ranging from about 0.015 N to about 0.2 N at 25 C. Also, working fluids for inhibiting the corrosion of carbon steel and resulting hydrogen formation and improving absorption in an ammonia/water absorption system under anaerobic conditions at up to 425 F. The working fluids may be aqueous solutions of ammonia and a strong base or aqueous solutions of ammonia, a strong base, and a specified buffer. 5 figs.

Phillips, B.A.; Whitlow, E.P.

1998-09-22T23:59:59.000Z

258

SUPPLY-SIDE OPTIMIZATION : MAXIMIZING ABSORPTIVE RATES  

E-Print Network [OSTI]

and Piglet walked home thoughtfully together in the golden evening, and for a long time they were silent The World of Pooh INTRODUCTION The complexities of feeding behavior extend far beyond the simple priorities source of the material and energy for this escalation in heterotrophs with digestive tracts is absorption

Jumars, Pete

259

Direct fired absorption machine flue gas recuperator  

DOE Patents [OSTI]

A recuperator which recovers heat from a gas, generally the combustion gas of a direct-fired generator of an absorption machine. The recuperator includes a housing with liquid flowing therethrough, the liquid being in direct contact with the combustion gas for increasing the effectiveness of the heat transfer between the gas and the liquid.

Reimann, Robert C. (Lafayette, NY); Root, Richard A. (Spokane, WA)

1985-01-01T23:59:59.000Z

260

Coupled dual loop absorption heat pump  

DOE Patents [OSTI]

A coupled dual loop absorption system which utilizes two separate complete loops. Each individual loop operates at three temperatures and two pressures. This low temperature loop absorber and condenser are thermally coupled to the high temperature loop evaporator, and the high temperature loop condenser and absorber are thermally coupled to the low temperature generator.

Sarkisian, Paul H. (Watertown, MA); Reimann, Robert C. (Lafayette, NY); Biermann, Wendell J. (Fayetteville, NY)

1985-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "absorption chiller research" 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

Absorption on horizon-wrapped branes  

E-Print Network [OSTI]

We compute the absorption cross section of space-time scalars on a static D2 rane, in global coordinates, wrapped on the S^2 of an AdS_2 X S^2 X CY_3 geometry. We discuss its relevance for the construction of the dual quantum mechanics of Calabi-Yau black holes.

S. Ansari; G. Panotopoulos; I. Sachs

2009-01-09T23:59:59.000Z

262

Absorption of solar radiation by solar neutrinos  

E-Print Network [OSTI]

We calculate the absorption probability of photons radiated from the surface of the Sun by a left-handed neutrino with definite mass and a typical momentum for which we choose |p_1|=0.2 MeV, producing a heavier right-handed antineutrino. Considering two transitions the \

G. Duplancic; P. Minkowski; J. Trampetic

2004-03-22T23:59:59.000Z

263

Absorption features of high redshift galactic winds  

E-Print Network [OSTI]

The environment of high-redshift galaxies is characterized by both wind-driven outflowing gas and gravitationally infalling streams. To investigate such galaxy-IGM interplay we have generated synthetic optical absorption line spectra piercing the volume surrounding a starbursting analog of a Lyman Break Galaxy selected in a $z \\approx 3$ output from a SPH simulation, including a detailed treatment of mechanical feedback from winds. Distributions for several observable species (HI, CIII, CIV, SiII, SiIII, SiIV, OVI, OVII, and OVIII) have been derived by post-processing the simulation outputs. The hot wind material is characterized by the presence of high-ionization species such as OVI, OVII, and OVIII (the latter two observable only in X-ray bands); the colder ($Tgas clumps. However, both line profile and Pixel Optical Depth analysis of the synthetic spectra show that the intergalactic filament in which the wind-blowing galaxy is embedded produces absorption signatures that closely mimic those of the wind environment. We conclude that may be difficult to clearly identify wind-blowing galaxies and their complex gaseous environment at high redshift in optical QSO absorption-line spectra based solely on the observed ion absorption patterns.

A. P. M. Fangano; A. Ferrara; P. Richter

2007-06-11T23:59:59.000Z

264

The effect of gastric inhibitory polypeptide on intestinal glucose absorption and intestinal motility in mice  

SciTech Connect (OSTI)

Research highlights: {yields} Exogenous GIP inhibits intestinal motility through a somatostatin-mediated pathway. {yields} Exogenous GIP inhibits intestinal glucose absorption by reducing intestinal motility. {yields} The GIP-receptor-mediated action in intestine does not involve in GLP-1-mediated pathway. -- Abstract: Gastric inhibitory polypeptide (GIP) is released from the small intestine upon meal ingestion and increases insulin secretion from pancreatic {beta} cells. Although the GIP receptor is known to be expressed in small intestine, the effects of GIP in small intestine are not fully understood. This study was designed to clarify the effect of GIP on intestinal glucose absorption and intestinal motility. Intestinal glucose absorption in vivo was measured by single-pass perfusion method. Incorporation of [{sup 14}C]-glucose into everted jejunal rings in vitro was used to evaluate the effect of GIP on sodium-glucose co-transporter (SGLT). Motility of small intestine was measured by intestinal transit after oral administration of a non-absorbed marker. Intraperitoneal administration of GIP inhibited glucose absorption in wild-type mice in a concentration-dependent manner, showing maximum decrease at the dosage of 50 nmol/kg body weight. In glucagon-like-peptide-1 (GLP-1) receptor-deficient mice, GIP inhibited glucose absorption as in wild-type mice. In vitro examination of [{sup 14}C]-glucose uptake revealed that 100 nM GIP did not change SGLT-dependent glucose uptake in wild-type mice. After intraperitoneal administration of GIP (50 nmol/kg body weight), small intestinal transit was inhibited to 40% in both wild-type and GLP-1 receptor-deficient mice. Furthermore, a somatostatin receptor antagonist, cyclosomatostatin, reduced the inhibitory effect of GIP on both intestinal transit and glucose absorption in wild-type mice. These results demonstrate that exogenous GIP inhibits intestinal glucose absorption by reducing intestinal motility through a somatostatin-mediated pathway rather than through a GLP-1-mediated pathway.

Ogawa, Eiichi [Department of Diabetes and Clinical Nutrition, Graduate School of Medicine, Kyoto University (Japan)] [Department of Diabetes and Clinical Nutrition, Graduate School of Medicine, Kyoto University (Japan); Hosokawa, Masaya [Department of Diabetes and Clinical Nutrition, Graduate School of Medicine, Kyoto University (Japan) [Department of Diabetes and Clinical Nutrition, Graduate School of Medicine, Kyoto University (Japan); Faculty of Human Sciences, Tezukayama Gakuin University, Osaka (Japan); Harada, Norio; Yamane, Shunsuke; Hamasaki, Akihiro; Toyoda, Kentaro; Fujimoto, Shimpei; Fujita, Yoshihito; Fukuda, Kazuhito [Department of Diabetes and Clinical Nutrition, Graduate School of Medicine, Kyoto University (Japan)] [Department of Diabetes and Clinical Nutrition, Graduate School of Medicine, Kyoto University (Japan); Tsukiyama, Katsushi; Yamada, Yuichiro [Department of Diabetes and Clinical Nutrition, Graduate School of Medicine, Kyoto University (Japan) [Department of Diabetes and Clinical Nutrition, Graduate School of Medicine, Kyoto University (Japan); Department of Internal Medicine, Division of Endocrinology, Diabetes and Geriatric Medicine, Akita University School of Medicine, Akita (Japan); Seino, Yutaka [Department of Diabetes and Clinical Nutrition, Graduate School of Medicine, Kyoto University (Japan) [Department of Diabetes and Clinical Nutrition, Graduate School of Medicine, Kyoto University (Japan); Kansai Electric Power Hospital, Osaka (Japan); Inagaki, Nobuya, E-mail: inagaki@metab.kuhp.kyoto-u.ac.jp [Department of Diabetes and Clinical Nutrition, Graduate School of Medicine, Kyoto University (Japan) [Department of Diabetes and Clinical Nutrition, Graduate School of Medicine, Kyoto University (Japan); CREST of Japan Science and Technology Cooperation (JST), Kyoto (Japan)

2011-01-07T23:59:59.000Z

265

South Campus Recreation Complex  

E-Print Network [OSTI]

Coll Southside Chiller East West Hickerson Morehead Everett Alexander Spencer Connor Joyner Dogwood Center for South North Neurosciences George Horton ITS South Chiller Plant Research 49 Tank Mason Farm Rd. 1800 Health Campus Chiller South APCF- Forest Lewis OldWest Grimes Stadium Biomolecular Moses Paul Hardin St

North Carolina at Chapel Hill, University of

266

Integrated vacuum absorption steam cycle gas separation  

DOE Patents [OSTI]

Methods and systems for separating a targeted gas from a gas stream emitted from a power plant. The gas stream is brought into contact with an absorption solution to preferentially absorb the targeted gas to be separated from the gas stream so that an absorbed gas is present within the absorption solution. This provides a gas-rich solution, which is introduced into a stripper. Low pressure exhaust steam from a low pressure steam turbine of the power plant is injected into the stripper with the gas-rich solution. The absorbed gas from the gas-rich solution is stripped in the stripper using the injected low pressure steam to provide a gas stream containing the targeted gas. The stripper is at or near vacuum. Water vapor in a gas stream from the stripper is condensed in a condenser operating at a pressure lower than the stripper to concentrate the targeted gas. Condensed water is separated from the concentrated targeted gas.

Chen, Shiaguo (Champaign, IL); Lu, Yonggi (Urbana, IL); Rostam-Abadi, Massoud (Champaign, IL)

2011-11-22T23:59:59.000Z

267

Atomic Absorption Spectrometry Perkin Elmer 500, Chemistry & Biochemistry  

E-Print Network [OSTI]

Atomic Absorption Spectrometry · Perkin Elmer 500, Chemistry & Biochemistry · Perkin Elmer 560 AA-star stopped flow with absorption, fluorescence and circular dichroism detection · KinTek quench flow apparatus

Gruner, Daniel S.

268

Multiband Optical Absorption Controlled by Lattice Strain in...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Multiband Optical Absorption Controlled by Lattice Strain in Thin-Film LaCrO3. Multiband Optical Absorption Controlled by Lattice Strain in Thin-Film LaCrO3. Abstract: Experimental...

269

Infrared absorption spectra, radiative efficiencies, and global warming potentials  

E-Print Network [OSTI]

Infrared absorption spectra, radiative efficiencies, and global warming potentials absorption spectra, radiative efficiencies, and global warming potentials of perfluorocarbons: Comparison. (1995) and combined with atmospheric lifetimes from the literature to determine global warming

Wirosoetisno, Djoko

270

The digestive adaptation of flying vertebrates: High intestinal paracellular absorption  

E-Print Network [OSTI]

The digestive adaptation of flying vertebrates: High intestinal paracellular absorption compensates analysis. Significantly greater amplification of digestive surface area by villi in small birds, also in actively flying vertebrates. digestion gut morphometrics nutrient absorption paracellular uptake Birds have

Mladenoff, David

271

CO2 Capture by Absorption with Potassium Carbonate  

E-Print Network [OSTI]

CO2 Capture by Absorption with Potassium Carbonate First Quarterly Report 2007 Quarterly Progress of this work is to improve the process for CO2 capture by alkanolamine absorption/stripping by developing

Rochelle, Gary T.

272

CO2 Capture by Absorption with Potassium Carbonate  

E-Print Network [OSTI]

CO2 Capture by Absorption with Potassium Carbonate Fourth Quarterly Report 2006 Quarterly Progress of this work is to improve the process for CO2 capture by alkanolamine absorption/stripping by developing

Rochelle, Gary T.

273

Radiation absorption properties of different plaster samples  

SciTech Connect (OSTI)

Although the plaster is one of the oldest known synthetic building materials, nowadays, it is used as interior coating of walls and ceilings of buildings. Thus measuring its radiation shielding properties is vital. For this purpose, radiation absorption properties of different plaster samples in this study. The measurements have been performed using gamma spectrometer system which connected to 3'' Multiplication-Sign 3''NaI (TI) detector.

Akkurt, Iskender; Guenoglu, Kadir; Mavi, Betuel; K Latin-Small-Letter-Dotless-I l Latin-Small-Letter-Dotless-I ncarslan, Semsettin; Seven, Aysun [Suleyman Demirel University, Faculty of Arts and Sciences, Department of Physics, Isparta (Turkey); Amasya University, Faculty of Arts and Sciences, Department of Physics, Amasya (Turkey); Suleyman Demirel University, Faculty of Technical Education, Department of Construction Education, Isparta (Turkey)

2012-09-06T23:59:59.000Z

274

The absorption of ultrasonic waves in liquids  

E-Print Network [OSTI]

Vee ~ ~ ~ ~ a ~ ~ ~ ~ ~ ~ a ~ e ~ ~ ~ ~ a ~ ~ ea ~ ~ ~ eee ~ ~ ~ ~ ~ ~ ea ~ ~ ~ ~ 2 ~ ?easursasnt of ths Prop-:. ties of:asss and Liquids by Ultrasonicseae ~ ~ ~ ~ ~ e ~ ~ ~ ~ ~ ~ ~ ~ e ~ ~ dies Borne erscsnt Theories ConcsrrrinS the Oisorsparrcy 3e tween... ~ ~ ~ ~ ~ ~ ~ o 3Q VI, Plot of' Los A /A vs~ Sound Path Length Ital ZthoI' 1Mox' Ppoalul'oe ~ ~ a ~ y ~ ~ s ~ ~ ~ ~ ~ ~ e ~ ~ ~ e s ~ ~ ~ ~ e ~ ~ a ~ ~ 3) xxeasuraaents oa the absorption of high frequency souad. waves ia liquids axe useful ia studying...

Hudson, Paul A

2012-06-07T23:59:59.000Z

275

Oral absorption of apramycin in newborn calves  

E-Print Network [OSTI]

as a model is the Journal of Veterinary Pharmacology and Therapeutics. animals in other species may also have a larger extent of absorption than older animals. Apramycin is an aminoglycoside antibiotic which is active against some gram... to healthy newborn (less than 24 hours old) veal calves than calves that are 3 weeks old. If the drug is absorbed, it indicates that neonatal calves have a greater capacity to absorb a poorly absorbed drug, thereby potentiating possible problems...

Buck, Joan Marjorie

2012-06-07T23:59:59.000Z

276

Split-flow regeneration in absorptive air separation  

DOE Patents [OSTI]

A chemical absorptive separation of air in multiple stage of absorption and desorption is performed with partial recycle of absorbent between stages of desorption necessary to match equilibrium conditions in the various stages of absorption. This allows reduced absorbent flow, reduced energy demand and reduced capital costs. 4 figs.

Weimer, R.F.

1987-11-24T23:59:59.000Z

277

Split-flow regeneration in absorptive air separation  

DOE Patents [OSTI]

A chemical absorptive separation of air in multiple stage of absorption and desorption is performed with partial recycle of absorbent between stages of desorption necessary to match equilibrium conditions in the various stages of absorption. This allows reduced absorbent flow, reduced energy demand and reduced capital costs.

Weimer, Robert F. (Allentown, PA)

1987-01-01T23:59:59.000Z

278

Atomic Absorption Method Guide Zn in Copper Alloys  

E-Print Network [OSTI]

Atomic Absorption Method Guide Zn in Copper Alloys Principle The sample is digested in nitric/hydrochloric acid, and zinc is determined by flame atomic absorption spectrometry using an air-acetylene flame · Copper Alloys · Zinc · Flame · Atomic Absorption Method Guide: 40158 #12;©2008 Thermo Fisher Scientific

Wells, Mathew G. - Department of Physical and Environmental Sciences, University of Toronto

279

Laser Locking with Doppler-free Saturated Absorption Spectroscopy  

E-Print Network [OSTI]

there are many ways to stabilize the frequency of a laser, atomic absorption lines are particularly accurate are made, it becomes possible to resolve the saturated absorption lines that correspond to specific atomic absorption spectroscopy. This affects the number of atoms in the ground state and excited state

Novikova, Irina

280

LATTICE DYNAMICS NUCLEAR RESONANCE ABSORPTION OF GAMMA-RADIATION  

E-Print Network [OSTI]

crystalline domains are taken. Absorption studies of the dynamics of atomic motions in condensed matterLATTICE DYNAMICS NUCLEAR RESONANCE ABSORPTION OF GAMMA-RADIATION AND COHERENT DECAY MODES Institut Max von Laue-Paul Langevin, Grenoble, France R6sumb. -La section efficace pour l'absorption nucleaire

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "absorption chiller research" 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

Colossal Absorption of Molecules Inside Single Terahertz Nanoantennas  

E-Print Network [OSTI]

Colossal Absorption of Molecules Inside Single Terahertz Nanoantennas Hyeong-Ryeol Park, Kwang Jun: Molecules have extremely small absorption cross sections in the terahertz range even under resonant to be enhanced by >103 accompanied by a colossal absorption coefficient of 170 000 cm-1 . Tens of nanograms

Park, Namkyoo

282

Woodhead Publishing Limited, 2013 Tunable mid-infrared laser absorption  

E-Print Network [OSTI]

absorption spectroscopy F. K. TITTEL and R. LEWICKI, Rice University, USA DOI: 10 absorption spectroscopy (LAS) and recent examples of their use in field deployable optical instruments detection methods that include several types of multipass gas absorption cells with the option to apply

283

HHFW absorption in Neutral-Beam heated NSTX plasmas  

E-Print Network [OSTI]

HHFW absorption in Neutral-Beam heated NSTX plasmas B. LeBlanc, M. Podestà, W. Heidbrink XP -1012 ions Need to characterize RF absorption as a function of RF phasing, L vs. H-mode plasmas, outer gap, optimized for FIDA measurements · Similar to 2008 FIDA experiment on RF absorption by fast ions · NB sources

Princeton Plasma Physics Laboratory

284

QSO Metal Absorption Systems at High Redshift Toru Misawa1  

E-Print Network [OSTI]

QSO Metal Absorption Systems at High Redshift Toru Misawa1 , Nobunari Kashikawa2 , Youichi Ohyama2 Abstract. Quasar absorption systems give us useful information about very faint objects that we cannot detect directly. For example, metal absorption systems are generally provided by star formation

Iye, Masanori

285

Optical absorption spectra and geometric e ects in higher fullerenes  

E-Print Network [OSTI]

Optical absorption spectra and geometric e ects in higher fullerenes (Running head: Optical absorption in higher fullerenes) Kikuo Harigaya and Shuji Abe Physical Science Division, Electrotechnical of their amplitudes at the pentagons. The oscillator strengths of projected absorption almost accord with those

Harigaya, Kikuo

286

Does the photon-diffusion coefficient depend on absorption?  

E-Print Network [OSTI]

Does the photon-diffusion coefficient depend on absorption? T. Durduran and A. G. Yodh Department independent of absorption, i.e., D0 v/3 s . After presentation of the general theoretical arguments underlying this assertion, Monte Carlo simulations are performed and explicitly reveal that the absorption- independent

Boas, David

287

SPECTRA OF CRITICAL EXPONENTS IN NONLINEAR HEAT EQUATIONS WITH ABSORPTION  

E-Print Network [OSTI]

SPECTRA OF CRITICAL EXPONENTS IN NONLINEAR HEAT EQUATIONS WITH ABSORPTION V.A. GALAKTIONOV AND P of the classical porous medium equation with absorption u t = #1;u m u p in R N #2; R+ change their large-time behaviour at the critical absorption exponent p 0 = m+2=N . We show that, actually, there exists an in#12

Bath, University of

288

Assertion Absorption in Object Queries over Knowledge Bases  

E-Print Network [OSTI]

Assertion Absorption in Object Queries over Knowledge Bases Jiewen Wu, Alexander Hudek, David Toman contribute to this development by introducing a novel adaptation of bi- nary absorption for DL knowledge satisfaction problems in which consistency is assumed, and then revisit absorption in this new setting. To date

Waterloo, University of

289

Chukwuemeka I. Okoye Carbon Dioxide Solubility and Absorption Rate in  

E-Print Network [OSTI]

Copyright by Chukwuemeka I. Okoye 2005 #12;Carbon Dioxide Solubility and Absorption Rate _______________________ Nicholas A. Peppas #12;Carbon Dioxide Solubility and Absorption Rate in Monoethanolamine/Piperazine/H2O for. #12;iii Carbon Dioxide Solubility and Absorption Rate in Monoethanolamine/Piperazine/H2O

Rochelle, Gary T.

290

On the Absorption and Emission Properties of Interstellar Grains  

E-Print Network [OSTI]

Our current understanding of the absorption and emission properties of interstellar grains are reviewed. The constraints placed by the Kramers-Kronig relation on the wavelength-dependence and the maximum allowable quantity of the dust absorption are discussed. Comparisons of the opacities (mass absorption coefficients) derived from interstellar dust models with those directly estimated from observations are presented.

Aigen Li

2005-03-25T23:59:59.000Z

291

CO2 Capture by Absorption with Potassium Carbonate  

E-Print Network [OSTI]

CO2 Capture by Absorption with Potassium Carbonate Third Quarterly Report 2005 Quarterly Progress absorption/stripping by developing an alternative solvent, aqueous K2CO3 promoted by piperazine. Modeling.................................................................................................................................. 11 Task 1 ­ Modeling Performance of Absorption/Stripping of CO2 with Aqueous K2CO3 Promoted

Rochelle, Gary T.

292

CO2 Capture by Absorption with Potassium Carbonate  

E-Print Network [OSTI]

CO2 Capture by Absorption with Potassium Carbonate First Quarterly Report 2006 Quarterly Progress the process for CO2 capture by alkanolamine absorption/stripping by developing an alternative solvent, aqueous.................................................................................................................................... 8 Task 1 ­ Modeling Performance of Absorption/Stripping of CO2 with Aqueous K2CO3 Promoted

Rochelle, Gary T.

293

CO2 Capture by Absorption with Potassium Carbonate  

E-Print Network [OSTI]

CO2 Capture by Absorption with Potassium Carbonate Third Quarterly Report 2006 Quarterly Progress of this work is to improve the process for CO2 capture by alkanolamine absorption/stripping by developing...................................................................................................................................11 Task 1 ­ Modeling Performance of Absorption/Stripping of CO2 with Aqueous K2CO3 Promoted

Rochelle, Gary T.

294

CO2 Capture by Absorption with Potassium Carbonate  

E-Print Network [OSTI]

CO2 Capture by Absorption with Potassium Carbonate Second Quarterly Report 2006 Quarterly Progress of this work is to improve the process for CO2 capture by alkanolamine absorption/stripping by developing.................................................................................................................................. 10 Task 1 ­ Modeling Performance of Absorption/Stripping of CO2 with Aqueous K2CO3 Promoted

Rochelle, Gary T.

295

Application of Quantitative Fluorescence and Absorption-Edge  

E-Print Network [OSTI]

Application of Quantitative Fluorescence and Absorption-Edge Computed Microtomography to Image, Chicago, Illinois 60637 This paper shows that synchrotron-based fluorescence and absorption-edge computed, which had a well-correlated metal coating. Absorption-edge CMT showed the three-dimensional distribution

Sparks, Donald L.

296

CO2 Capture by Absorption with Potassium Carbonate  

E-Print Network [OSTI]

CO2 Capture by Absorption with Potassium Carbonate Fourth Quarterly Report 2005 Quarterly Progress absorption/stripping by developing an alternative solvent, aqueous K2CO3 promoted by piperazine. In Campaign.................................................................................................................................... 9 Task 1 ­ Modeling Performance of Absorption/Stripping of CO2 with Aqueous K2CO3 Promoted

Rochelle, Gary T.

297

Absorption of Carbon Dioxide in Aqueous Piperazine/Methyldiethanolamine  

E-Print Network [OSTI]

Absorption of Carbon Dioxide in Aqueous Piperazine/Methyldiethanolamine Sanjay Bishnoi and Gary T dioxide absorption in 0.6 M piperazine PZ r4 M methyldiethanolamine ( )MDEA was measured in a wetted wall loading. The absorption rate did not follow pseudo first-order beha®ior except at ®ery low loading. All

Rochelle, Gary T.

298

E-Print Network 3.0 - absorption heat exchange Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Center MOTIVATION ABSORPTION HEAT PUMP COMBINED CARNOT CYCLES... HEAT-DRIVEN HEAT PUMPS EXERGY DESTRUCTION IN ABSORPTION CYCLE PROCESSES ZERO-ORDER ABSORPTION...

299

SPECIES DETERMINATION OF ORGANOMETALLIC COMPOUNDS USING ZEEMAN ATOMIC ABSORPTION SPECTROSCOPY WITH LIQUID CHROMATOGRAPHY  

E-Print Network [OSTI]

Compounds Using Zeeman Atomic Absorption Spectroscopy WithCompounds Using Zeeman ,Atomic Absorption Spectroscopy withcapabilities of Zeeman atomic absorption spectroscopy (ZAA)

Koizumi, H.

2011-01-01T23:59:59.000Z

300

X-RAY ABSORPTION SPECTROSCOPY FOR THE CHEMICAL CHARACTERIZATION OF ATMOSPHERIC AEROSOLS  

E-Print Network [OSTI]

November 11-16 9 1979 X-RAY ABSORPTION SPECTROSCOPY FOR THEUniversity of California. ABSORPTION SPECTROSCOPY FOR THEand x-ray emission and absorption spectroscopy. The first

Jaklevic, J. M.

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "absorption chiller research" 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

Absorption and scattering by long and randomly oriented linear chains of spheres  

E-Print Network [OSTI]

experimental measurements absorption and scattering cross-C. Bohren and D. Huffman, Absorption and Scattering of LightScattering and absorption of light by nonspherical

Lee, Euntaek; Pilon, Laurent

2013-01-01T23:59:59.000Z

302

INFRARED ABSORPTION SPECTROSCOPY OF CARBON MONOXIDE ON NICKEL FILMS: A LOW TEMPERATURE THERMAL DETECTION TECHNIQUE  

E-Print Network [OSTI]

A. B. Optical System Absorption Signal C. Small SignalNoise . Sensitivity of Absorption Spectroscopy EXPERIMENTSINFRARED ABSORPTION SPECTROSCOPY OF CARBON MONOXIDE ON

Bailey, Robert Brian

2011-01-01T23:59:59.000Z

303

Absorption of solar radiation by the cloudy atmosphere: Further interpretations of collocated aircraft measurements  

E-Print Network [OSTI]

J. Vitko Jr. , Absorption of solar radiation by the cloudyet al. , Absorption of solar radiation by clouds: Observa-1999 Absorption of solar radiation by the cloudy atmosphere:

1999-01-01T23:59:59.000Z

304

Improvement of the Performance for an Absorption Refrigeration System with Lithium bromide-water as Refrigerant by Increasing Absorption Pressure  

E-Print Network [OSTI]

ICEBO2006, Shenzhen, China HVAC Technologies for Energy Efficiency, Vol. IV-10-4 Improvement of the Performance for an Absorption Refrigerating System with Lithium bromide-water as Refrigerant by Increasing Absorption... in order to lay a theoretical foundation of improving the performance of whole LBAC. 2. THE PRINCIPLE OF ENHANCING ABSORPTION EFFICIENCY OF THE ABSORBER It is well known that the absorption of ICEBO2006, Shenzhen, China HVAC...

Xie, G.; Sheng, G.; Li, G.; Pan, S.

2006-01-01T23:59:59.000Z

305

Case Study: Lessons Learned From Converting Electric Chillers to Steam Chillers in a Electric Deregulated Market.  

E-Print Network [OSTI]

was that a flatter load profile due to steam cooling should allow better electric pricing from energy suppliers....

Wohl, J.

306

Tunable subwavelength strong absorption by graphene wrapped dielectric particles  

E-Print Network [OSTI]

The optical absorption properties of graphene wrapped dielectric particles have been investigated by using Mie scattering theory and exact multi-scattering method. It is shown that subwavelength strong absorption in infrared spectra can take place in such systems due to the excitation of plasmon resonance in graphene. The absorption characteristics and efficiency are tunable by varying Fermi level and damping constant of graphene, or by changing size and dielectric constant of small particles. For a cluster of these particles, the absorption characteristics are also affected by the separation distance between them. These extreme light resonances and absorptions in graphene wrapped nanostructures have great potential for opto-electronic devices.

Yang, Bing; Yang, Yue; Zhang, Xiangdong

2015-01-01T23:59:59.000Z

307

Dilution cycle control for an absorption refrigeration system  

DOE Patents [OSTI]

A dilution cycle control system for an absorption refrigeration system is disclosed. The control system includes a time delay relay for sensing shutdown of the absorption refrigeration system and for generating a control signal only after expiration of a preselected time period measured from the sensed shutdown of the absorption refrigeration system, during which the absorption refrigeration system is not restarted. A dilution cycle for the absorption refrigeration system is initiated in response to generation of a control signal by the time delay relay. This control system is particularly suitable for use with an absorption refrigeration system which is frequently cycled on and off since the time delay provided by the control system prevents needless dilution of the absorption refrigeration system when the system is turned off for only a short period of time and then is turned back on.

Reimann, Robert C. (Lafayette, NY)

1984-01-01T23:59:59.000Z

308

Improved self-absorption correction for extended x-ray absorption fine-structure measurements  

SciTech Connect (OSTI)

Extended x-ray absorption fine-structure (EXAFS) data collected in the fluorescence mode are susceptible to an apparent amplitude reduction due to the self-absorption of the fluorescing photon by the sample before it reaches a detector. Previous treatments have made the simplifying assumption that the effect of the EXAFS on the correction term is negligible, and that the samples are in the thick limit. We present a nearly exact treatment that can be applied for any sample thickness or concentration, and retains the EXAFS oscillations in the correction term.

Booth, C.H.; Bridges, F.

2003-06-04T23:59:59.000Z

309

Cross section for charmonium absorption by nucleons  

E-Print Network [OSTI]

July 2001; publishe The cross section for J/c absorption by nucleons is with empirical particle masses, which has been used previousl by pion and r meson. Including both two-body and three-bod of 1 GeV at interaction vertices involving charm hadrons... and is consistent with that extracted from J/c productio DOI: 10.1103/PhysRevC.65.015203 PAC I. INTRODUCTION Two main mechanisms for J/c suppression observed in relativistic heavy ion collisions @1# are the dissociation by the quark-gluon plasma @2...

Liu, W.; Ko, Che Ming; Lin, ZW.

2002-01-01T23:59:59.000Z

310

Absorption Heat Pumps | Department of Energy  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc Documentation RUCProductstwrmrAre the Effects ofAbout ScienceAbout Oak RidgeAbouttheAbsorption

311

Distributed Bragg Reflectors With Reduced Optical Absorption  

DOE Patents [OSTI]

A new class of distributed Bragg reflectors has been developed. These distributed Bragg reflectors comprise interlayers positioned between sets of high-index and low-index quarter-wave plates. The presence of these interlayers is to reduce photon absorption resulting from spatially indirect photon-assisted electronic transitions between the high-index and low-index quarter wave plates. The distributed Bragg reflectors have applications for use in vertical-cavity surface-emitting lasers for use at 1.55 .mu.m and at other wavelengths of interest.

Klem, John F. (Albuquerque, NM)

2005-08-16T23:59:59.000Z

312

Absorption of the $?$ and $?$ Mesons in Nuclei  

E-Print Network [OSTI]

Due to their long lifetimes, the $\\omega$ and $\\phi$ mesons are the ideal candidates for the study of possible modifications of the in-medium meson-nucleon interaction through their absorption inside the nucleus. During the E01-112 experiment at the Thomas Jefferson National Accelerator Facility, the mesons were photoproduced from $^{2}$H, C, Ti, Fe, and Pb targets. This paper reports the first measurement of the ratio of nuclear transparencies for the $e^{+}e^{-}$ channel. The ratios indicate larger in-medium widths compared with what have been reported in other reaction channels.

M. H. Wood; R. Nasseripour; M. Paolone; C. Djalali; D. P. Weygand; the CLAS Collaboration

2010-06-17T23:59:59.000Z

313

Relative radiant heat absorption characteristics of two types of mirror shields and a polished aluminum shield  

E-Print Network [OSTI]

compared. The relative absorptivities of two types of rear?silvered safety plate mirrors and a polished aluminum sheet will be compared in this research. LITERATURE REVIEW Modes of Heat Transmission It is well understood that heat may flow only... of vasomotor tone, peripheral venous blood pooling, hypotension, and cerebral anoxia. This instability results in nausea, giddi- 19 ness, universal discomfort, acute physical fatigue, and sometimes fainting. Salt deficiency from any of several possible...

Herron, Steven Douglas

1973-01-01T23:59:59.000Z

314

E-Print Network 3.0 - absorption spectroscopy measurements Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

A partial sampling of these techniques includes: Absorption spectroscopy Atomic absorption... spectroscopy Auger electron ... Source: Yucca Mountain Project, US...

315

E-Print Network 3.0 - absorption spectrometry etaas Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

With Confirmation of Accuracy by Inductively Coupled Plasma Mass Spectrometry and Atomic Absorption Spectrometry... -LEAFS uses absorption; graphite furnace; inductively...

316

Elimination of self-absorption in fluorescence hard-x-ray absorption spectra P. Pfalzer, J.-P. Urbach, M. Klemm, and S. Horn  

E-Print Network [OSTI]

Elimination of self-absorption in fluorescence hard-x-ray absorption spectra P. Pfalzer, J-ray absorption spectra in situations where samples cannot be made in the required configuration. However, self-absorption-ray absorption coefficients. This procedure is used to obtain the vanadium K-edge spectrum of single crystal V2O3

Frenkel, Anatoly

317

Single photon absorption by a single atom: from heralded absorption to polarization state mapping  

E-Print Network [OSTI]

Together with photon emission, the absorption of a single photon by a single atom is a fundamental process in matter-light interaction that manifests its quantum mechanical nature. As an experimentally controlled process, it is a key tool for the realization of quantum technologies. In particular, in an atom/photon based quantum network scenario, in which localized atomic particles are used as quantum information processing nodes while photons are used as carriers of quantum information between distant nodes, controlling both emission and absorption of single photons by single atoms is required for quantum coherent state mapping between the two entities. Most experimental efforts to date have focused on establishing the control of single photon emission by single trapped atoms, and the implementation of quantum networking protocols using this interaction. In this chapter, we describe experimental efforts to control the process of single photon absorption by single trapped ions. We describe a series of experiments in which polarization entangled photon pairs, generated by a spontaneous parametric down-conversion source, are coupled to a single ion. First the source is operated to generate heralded single photons, and coincidences between the absorption event of one photon of the pair and the detection of the heralding partner photon are observed. We then show how polarization control in the process is established, leading to the manifestation of the photonic polarization entanglement in the absorption process. Finally, we introduce protocols in which this interaction scheme is harnessed to perform tasks in a quantum network, such as entanglement distribution among distant nodes of the network, and we demonstrate a specific protocol for heralded, high-fidelity photon-to-atom quantum state transfer.

Nicolas Piro; Jürgen Eschner

2015-02-19T23:59:59.000Z

318

Ammonia and ammonium hydroxide sensors for ammonia/water absorption machines: Literature review and data compilation  

SciTech Connect (OSTI)

This report describes an evaluation of various sensing techniques for determining the ammonia concentration in the working fluid of ammonia/water absorption cycle systems. The purpose of this work was to determine if any existing sensor technology or instrumentation could provide an accurate, reliable, and cost-effective continuous measure of ammonia concentration in water. The resulting information will be used for design optimization and cycle control in an ammonia-absorption heat pump. PNL researchers evaluated each sensing technology against a set of general requirements characterizing the potential operating conditions within the absorption cycle. The criteria included the physical constraints for in situ operation, sensor characteristics, and sensor application. PNL performed an extensive literature search, which uncovered several promising sensing technologies that might be applicable to this problem. Sixty-two references were investigated, and 33 commercial vendors were identified as having ammonia sensors. The technologies for ammonia sensing are acoustic wave, refractive index, electrode, thermal, ion-selective field-effect transistor (ISFET), electrical conductivity, pH/colormetric, and optical absorption. Based on information acquired in the literature search, PNL recommends that follow-on activities focus on ISFET devices and a fiber optic evanescent sensor with a colormetric indicator. The ISFET and fiber optic evanescent sensor are inherently microminiature and capable of in situ measurements. Further, both techniques have been demonstrated selective to the ammonium ion (NH{sub 4}{sup +}). The primary issue remaining is how to make the sensors sufficiently corrosion-resistant to be useful in practice.

Anheier, N.C. Jr.; McDonald, C.E.; Cuta, J.M.; Cuta, F.M.; Olsen, K.B.

1995-05-01T23:59:59.000Z

319

Enhanced light absorption of solar cells and photodetectors by diffraction  

DOE Patents [OSTI]

Enhanced light absorption of solar cells and photodetectors by diffraction is described. Triangular, rectangular, and blazed subwavelength periodic structures are shown to improve performance of solar cells. Surface reflection can be tailored for either broadband, or narrow-band spectral absorption. Enhanced absorption is achieved by efficient optical coupling into obliquely propagating transmitted diffraction orders. Subwavelength one-dimensional structures are designed for polarization-dependent, wavelength-selective absorption in solar cells and photodetectors, while two-dimensional structures are designed for polarization-independent, wavelength-selective absorption therein. Suitable one and two-dimensional subwavelength periodic structures can also be designed for broadband spectral absorption in solar cells and photodetectors. If reactive ion etching (RIE) processes are used to form the grating, RIE-induced surface damage in subwavelength structures can be repaired by forming junctions using ion implantation methods. RIE-induced surface damage can also be removed by post RIE wet-chemical etching treatments.

Zaidi, Saleem H.; Gee, James M.

2005-02-22T23:59:59.000Z

320

Commercialization of Industrialized Absorption Heat Pumps in the US  

E-Print Network [OSTI]

COMMERCIALIZATION OF INDUSTRIAL ABSORPTION HEAT PUMPS IN THE US MALCOLM G. PETTIGREW LITWIN ENGINEERS &CONSTRUCTORS, INC. HOUSTON, ABSTRACT The recovery of waste heat through absorption heat pumping is quite appeal ing to U.S. industry.... However, although this technology has been successfully applied in Europe and Japan, a cauti ous atmosphere wi 11 continue to prevail in the U.S. until the first absorption heat pump is built and successfully demonstrates it's viability...

Pettigrew, M. G.

Note: This page contains sample records for the topic "absorption chiller research" 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.


321

Absorption Lengths in the Holographic Plasma  

E-Print Network [OSTI]

We consider the effect of a periodic perturbation with frequency $\\omega$ on the holographic N=4 plasma represented by the planar AdS black hole. The response of the system is given by exponentially decaying waves. The corresponding complex wave numbers can be found by solving wave equations in the AdS black hole background with infalling boundary conditions on the horizon in an analogous way as in the calculation of quasinormal modes. The complex momentum eigenvalues have an interpretation as poles of the retarded Green's functions, where the inverse of the imaginary part gives an absorption length $\\lambda$. At zero frequency we obtain the screening length for a static field. These are directly related to the glueball masses in the dimensionally reduced theory. We also point out that the longest screening length corresponds to an operator with non-vanishing R-charge and thus does not have an interpretation as a QCD3 glueball.

Irene Amado; Carlos Hoyos; Karl Landsteiner; Sergio Montero

2007-07-11T23:59:59.000Z

322

Gas separation using ultrasound and light absorption  

DOE Patents [OSTI]

An apparatus and method for separating a chosen gas from a mixture of gases having no moving parts and utilizing no chemical processing is described. The separation of particulates from fluid carriers thereof has been observed using ultrasound. In a similar manner, molecular species may be separated from carrier species. It is also known that light-induced drift may separate light-absorbing species from carrier species. Therefore, the combination of temporally pulsed absorption of light with ultrasonic concentration is expected to significantly increase the efficiency of separation by ultrasonic concentration alone. Additionally, breaking the spatial symmetry of a cylindrical acoustic concentrator decreases the spatial distribution of the concentrated particles, and increases the concentration efficiency.

Sinha, Dipen N. (Los Alamos, NM)

2012-07-31T23:59:59.000Z

323

J/$?$ absorption in a multicomponent hadron gas  

E-Print Network [OSTI]

A model for anomalous $J/\\Psi$ suppression in high energy heavy ion collisions is presented. As the additional suppression mechanism beyond standard nuclear absorption inelastic $J/\\Psi$ scattering with hadronic matter is considered. Hadronic matter is modeled as an evolving multi-component gas of point-like non-interacting particles (MCHG). Estimates for the sound velocity of the MCHG are given and the equation of state is compared with Lattice QCD data in the vicinity of the deconfinement phase transition. The approximate cooling pattern caused by longitudinal expansion is presented. It is shown that under these conditions the resulting $J/\\Psi$ suppression pattern agrees well with NA38 and NA50 data.

Dariusz Prorok; Ludwik Turko; David Blaschke

2008-08-04T23:59:59.000Z

324

absorption spectrometry feasibility: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption is induced by tunable laser excitation Maier, John Paul 5 FEASIBILITY OF SOLAR-FIRED, COMPRESSOR-ASSISTED Energy Storage, Conversion and Utilization Websites...

325

absorption heat pump: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Heating capacity k jet nozzle Closed Cycles: AbsorptionAdsorption heat pump thermal compressor driven by waste heat1 Industrial heat pumps in Germany - potentials,...

326

E-Print Network 3.0 - absorption spectroscopy characterization...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and Restoration Technologies 87 Terahertz Time-Domain Spectroscopy Study of Silica Aerogels and Adsorbed Molecular Jiangquan Zhang and D. Grischkowsky* Summary: absorption...

327

Solar absorption by Mie resonances in cloud droplets  

E-Print Network [OSTI]

and narrower. These sensors measure solar backscattered andsensor channels where atmospheric absorption is particle dominated. The canonical resolution produces broadband solar

Zender, Charles S; Talamantes, Jorge

2006-01-01T23:59:59.000Z

328

Black holes and the absorption rate of cosmological scalar fields  

E-Print Network [OSTI]

We study the absorption of a massless scalar field by a static black hole. Using the continuity equation that arises from the Klein-Gordon equation, it is possible to define a normalized absorption rate $\\Gamma(t)$ for the scalar field as it falls into the black hole. It is found that the absorption mainly depends upon the characteristics wavelengths involved in the physical system: the mean wavenumber and the width of the wave packet, but that it is insensitive to the scalar field's strength. By taking a limiting procedure, we determine the minimum absorption fraction of the scalar field's mass by the black hole, which is around 50%.

L. Arturo Urena-Lopez; Lizbeth M. Fernandez

2011-07-15T23:59:59.000Z

329

Thermochemical Analysis of Hydrogen Absorption in Welding  

E-Print Network [OSTI]

)= tf. (ppm) in liquid iron (1) Using the tabulated free energy of this re· action {Ref. 1 is a Materials Engineering Con- sultant at Temav Center for Research. Venice. Italy. T. W. EAGAR is a Professor

Eagar, Thomas W.

330

Cascade Reverse Osmosis Air Conditioning System: Cascade Reverse Osmosis and the Absorption Osmosis Cycle  

SciTech Connect (OSTI)

BEETIT Project: Battelle is developing a new air conditioning system that uses a cascade reverse osmosis (RO)-based absorption cycle. Analyses show that this new cycle can be as much as 60% more efficient than vapor compression, which is used in 90% of air conditioners. Traditional vapor-compression systems use polluting liquids for a cooling effect. Absorption cycles use benign refrigerants such as water, which is absorbed in a salt solution and pumped as liquid—replacing compression of vapor. The refrigerant is subsequently separated from absorbing salt using heat for re-use in the cooling cycle. Battelle is replacing thermal separation of refrigerant with a more efficient reverse osmosis process. Research has shown that the cycle is possible, but further investment will be needed to reduce the number of cascade reverse osmosis stages and therefore cost.

None

2010-09-01T23:59:59.000Z

331

Optical absorption intensity of semiconductor single-wall carbon nanotubes  

E-Print Network [OSTI]

Optical absorption intensity of semiconductor single-wall carbon nanotubes Y. Oyama1 , R. Saito1. The optical absorption intensity is inversely proportional to the diameter in the unit of per carbon atom of single-wall carbon nanotubes (SWNT) synthesized by alcohol CCVD (ACCVD) method and HiPco method [1

Maruyama, Shigeo

332

Carbon Dioxide Capture by Chemical Absorption: A Solvent Comparison Study  

E-Print Network [OSTI]

1 Carbon Dioxide Capture by Chemical Absorption: A Solvent Comparison Study by Anusha Kothandaraman Students #12;2 #12;3 Carbon Dioxide Capture by Chemical Absorption: A Solvent Comparison Study by Anusha with electricity generation accounting for 40% of the total1 . Carbon capture and sequestration (CCS) is one

333

Infrared absorption spectra, radiative efficiencies, and global warming potentials  

E-Print Network [OSTI]

Infrared absorption spectra, radiative efficiencies, and global warming potentials of newly.mdpi.com/journal/atmosphere Article Infrared Absorption Spectra, Radiative Efficiencies, and Global Warming Potentials of Newly of 600­1730 cm-1 . These spectra are then used to calculate the radiative efficiencies and global warming

Wirosoetisno, Djoko

334

Optical absorption and ionization of silicate glasses Leonid B. Glebov  

E-Print Network [OSTI]

Optical absorption and ionization of silicate glasses Leonid B. Glebov School of Optics and hydroxyl), and induced (color centers) absorption of multicomponent silicate glasses in UV, visible-photon ionization was detected in alkaline-silicate glasses exposed to high-power laser radiation in nano

Glebov, Leon

335

affect intestinal absorption: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

affect intestinal absorption First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Intestinal Absorption and...

336

absorption features dust: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption features dust First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Silicon carbide absorption...

337

absorption spectrophotometric studies: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption spectrophotometric studies First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Light absorption...

338

absorption model: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption model First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Two models for absorption by coloured...

339

absorption cross section: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption cross section First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 ? absorption cross sections...

340

absorption line quasars: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption line quasars First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Quasar Absorption Lines...

Note: This page contains sample records for the topic "absorption chiller research" 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

absorption spectroscopy studies: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption spectroscopy studies First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 On Automatic Absorption...

342

absorption spectroscopic analysis: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption spectroscopic analysis First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 X-ray Absorption...

343

absorption line quasar: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption line quasar First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Quasar Absorption Lines...

344

absorption process tcap: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption process tcap First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Two-photon Absorption Process...

345

absorption band substructure: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption band substructure First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 THE ABSORPTION BAND EDGE...

346

alpha absorption systems: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption systems First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Lyman alpha Absorption Systems and...

347

UniversityofVirginia Facilities Management  

E-Print Network [OSTI]

. ..................................................................................................... Chiller Plants Gordon Durham .....................................................................gtd

Acton, Scott

348

Absorption of surface acoustic waves by topological insulator thin films  

SciTech Connect (OSTI)

We present a theoretical study on the absorption of the surface acoustic waves (SAWs) by Dirac electrons in topological insulator (TI) thin films (TITFs). We find that due to momentum and energy conservation laws, the absorption of the SAWs in TITFs can only be achieved via intra-band electronic transitions. The strong absorption can be observed up to sub-terahertz frequencies. With increasing temperature, the absorption intensity increases significantly and the cut-off frequency is blue-shifted. More interestingly, we find that the absorption of the SAWs by the TITFs can be markedly enhanced by the tunable subgap in the Dirac energy spectrum of the TI surface states. Such a subgap is absent in conventional two-dimensional electron gases (2DEGs) and in the gapless Dirac 2DEG such as graphene. This study is pertinent to the exploration of the acoustic properties of TIs and to potential application of TIs as tunable SAW devices working at hypersonic frequencies.

Li, L. L., E-mail: lllihfcas@foxmail.com [Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031 (China); Xu, W., E-mail: wenxu-issp@aliyun.com [Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031 (China); Department of Physics, Yunnan University, Kunming 650091 (China)

2014-08-11T23:59:59.000Z

349

Absorption media for irreversibly gettering thionyl chloride  

DOE Patents [OSTI]

Thionyl chloride is a hazardous and reactive chemical used as the liquid cathode in commercial primary batteries. Contrary to previous thinking, ASZM-TEDA.RTM. carbon (Calgon Corporation) reversibly absorbs thionyl chloride. Thus, several candidate materials were examined as irreversible getters for thionyl chloride. The capacity, rate and effect of temperature were also explored. A wide variety of likely materials were investigated through screening experiments focusing on the degree of heat generated by the reaction as well as the material absorption capacity and irreversibility, in order to help narrow the group of possible getter choices. More thorough, quantitative measurements were performed on promising materials. The best performing getter was a mixture of ZnO and ASZM-TEDA.RTM. carbon. In this example, the ZnO reacts with thionyl chloride to form ZnCl.sub.2 and SO.sub.2. The SO.sub.2 is then irreversibly gettered by ASZM-TEDA.RTM. carbon. This combination of ZnO and carbon has a high capacity, is irreversible and functions effectively above -20.degree. C.

Buffleben, George (Tracy, CA); Goods, Steven H. (Livermore, CA); Shepodd, Timothy (Livermore, CA); Wheeler, David R. (Albuquerque, NM); Whinnery, Jr., LeRoy (Danville, CA)

2002-01-01T23:59:59.000Z

350

This paper has been downloaded from the Building and Environmental Thermal Systems Research Group at Oklahoma State University  

E-Print Network [OSTI]

Project RP-1356. ABSTRACT Mechanical pipe insulation systems are installed around cold cylindrical conductivity is needed for the design of insulation systems in chiller pipe applications. In this paper specimen average temperature and wall thicknesses. Corresponding uncertainties of the measurements

351

HI Absorption in the Gigamaser Galaxy TXS 2226-184 and the Relation between HI Absorption and Water Emission  

E-Print Network [OSTI]

We report on the discovery of HI in absorption toward the gigamaser galaxy TXS2226-184 using the VLA. The absorption appears to consist of two components -- one with a width of 125 km/s, and one broader (420 km/s), both toward the compact radio source in the nucleus of the galaxy. Based on these large velocity widths we suggest that the HI absorption is produced in the central parsecs of the galaxy, on a similar scale to that which gives rise to the water maser emission. This brings to eight the number of galaxies known to exhibit both water masers and HI absorption. We explore the relationship between these two phenomena, and present a physically motivated (but unfruitful) search for water maser emission in five radio galaxies known to exhibit strong HI absorption.

G. B. Taylor; A. B. Peck; C. Henkel; H. Falcke; C. G. Mundell; C. P. O'Dea; S. A. Baum; J. F. Gallimore

2002-03-22T23:59:59.000Z

352

Molecular shock response of explosives: electronic absorption spectroscopy  

SciTech Connect (OSTI)

Electronic absorption spectroscopy in the range 400-800 nm was coupled to ultrafast laser generated shocks to begin addressing the question of the extent to which electronic excitations are involved in shock induced reactions. Data are presented on shocked polymethylmethacrylate (PMMA) thin films and single crystal pentaerythritol tetranitrate (PETN). Shocked PMMA exhibited thin film interference effects from the shock front. Shocked PETN exhibited interference from the shock front as well as broadband increased absorption. Relation to shock initiation hypotheses and the need for time dependent absorption data (future experiments) is briefly discussed.

Mcgrne, Shawn D [Los Alamos National Laboratory; Moore, David S [Los Alamos National Laboratory; Whitley, Von H [Los Alamos National Laboratory; Bolme, Cindy A [Los Alamos National Laboratory; Eakins, Daniel E [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

353

Standoff alpha radiation detection via excited state absorption of air  

SciTech Connect (OSTI)

A standoff alpha radiation detection technique based on the physical mechanism of excited state absorption of air molecules was explored and is presented in this paper. Instead of directly detecting the radiation via measuring the intensity of radiation induced air fluorescence, the radiation is detected via the excited state absorption of alpha radiation excited/ionized air molecules. Both theoretical analyses and experimental verifications were conducted. The experimental results confirmed that the radiation could be detected via excited state absorption of radiation excited/ionized air molecules at a 10 m standoff distance, which was consistent with the theoretical analyses.

Yao, Jimmy; Yin, Stuart Shizhuo [Department of Electrical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802 (United States)] [Department of Electrical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802 (United States); Brenizer, Jack [Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802 (United States)] [Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802 (United States); Hui, Rongqing [Department of Electrical Engineering and Computer Science, The University of Kansas, Lawrence, Kansas 66045 (United States)] [Department of Electrical Engineering and Computer Science, The University of Kansas, Lawrence, Kansas 66045 (United States)

2013-06-24T23:59:59.000Z

354

Analysis of interference in attosecond transient absorption in adiabatic condition  

E-Print Network [OSTI]

We simulate the transient absorption of attosecond pulses of infrared laser-dressed atoms by considering a three-level system with the adiabatic approximation. We study the delay-dependent interference features in the transient absorption spectra of helium atoms from the perspective of the coherent interaction processes between the attosecond pulse and the quasi-harmonics, and find that many features of the interference fringes in the absorption spectra of the attosecond pulse can be attributed to the coherence phase difference. And the modulation signals of laser-induced sidebands of the dark state is found related to the dark state with population modulated by the dressing field.

Dong, Wenpu; Wang, Xiaowei; Zhao, Zengxiu

2015-01-01T23:59:59.000Z

355

Balmer Absorption Lines in FeLoBALs  

E-Print Network [OSTI]

We discovered non-stellar Balmer absorption lines in two many-narrow-trough FeLoBALs (mntBALs) by the near-infrared spectroscopy with Subaru/CISCO. Presence of the non-stellar Balmer absorption lines is known to date only in the Seyfert galaxy NGC 4151, thus our discovery is the first cases for quasars. Since all known active galactic nuclei with Balmer absorption lines share characteristics, it is suggested that there is a population of BAL quasars which have unique structures at their nuclei or unique evolutionary phase.

K. Aoki; I. Iwata; K. Ohta; N. Tamura; M. Ando; M. Akiyama; G. Kiuchi; K. Nakanishi

2006-12-14T23:59:59.000Z

356

Multiplexed absorption tomography with calibration-free wavelength modulation spectroscopy  

SciTech Connect (OSTI)

We propose a multiplexed absorption tomography technique, which uses calibration-free wavelength modulation spectroscopy with tunable semiconductor lasers for the simultaneous imaging of temperature and species concentration in harsh combustion environments. Compared with the commonly used direct absorption spectroscopy (DAS) counterpart, the present variant enjoys better signal-to-noise ratios and requires no baseline fitting, a particularly desirable feature for high-pressure applications, where adjacent absorption features overlap and interfere severely. We present proof-of-concept numerical demonstrations of the technique using realistic phantom models of harsh combustion environments and prove that the proposed techniques outperform currently available tomography techniques based on DAS.

Cai, Weiwei; Kaminski, Clemens F., E-mail: cfk23@cam.ac.uk [Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB2 3RA (United Kingdom)

2014-04-14T23:59:59.000Z

357

On the origins of C IV absorption profile diversity in broad absorption line quasars  

E-Print Network [OSTI]

There is a large diversity in the C IV broad absorption line (BAL) profile among BAL quasars (BALQs). We quantify this diversity by exploring the distribution of the C IV BAL properties, FWHM, maximum depth of absorption and its velocity shift ($v_{\\rm md}$), using the SDSS DR7 quasar catalogue. We find the following: (i) Although the median C IV BAL profile in the quasar rest-frame becomes broader and shallower as the UV continuum slope ($\\alpha_{\\rm UV}$ at 1700-3000 A) gets bluer, the median individual profile in the absorber rest-frame remains identical, and is narrow (FWHM = 3500 km/s) and deep. Only 4 per cent of BALs have FWHM > 10,000 km/s. (ii) As the He II emission equivalent-width (EW) decreases, the distributions of FWHM and $v_{\\rm md}$ extend to larger values, and the median maximum depth increases. These trends are consistent with theoretical models in which softer ionizing continua reduce overionization, and allow radiative acceleration of faster BAL outflows. (iii) As $\\alpha_{\\rm UV}$ become...

Baskin, Alexei; Hamann, Fred

2015-01-01T23:59:59.000Z

358

USE OF ZEEMAN ATOMIC ABSORPTION SPECTROSCOPY FOR THE MEASUREMENT OF MERCURY IN OIL SHALE GASES  

E-Print Network [OSTI]

Isotope Zeeman Atomic Absorption; A new approach to chemical6782 Use of Zeeman Atomic Absorption Spectroscopy for theb:l r I USE OF ZEEMAN ATOMIC ABSORPTION SPECTROSCOPY FOR THE

Girvin, D.G.

2011-01-01T23:59:59.000Z

359

X-RAY ABSORPTION STUDIES OF GRAPHITE INTERCALATES AND METAL-AMMONIA SOLUTION  

E-Print Network [OSTI]

I. INTRODUCTION A. X-Ray Absorption Spectroscopy B. Graphiteacknowledged. The X-Ray absorption data could not have beenI INTRODUCTION X-ray absorption, spectroscopy (XAS) has been

Robertson, A.S.

2010-01-01T23:59:59.000Z

360

Optical Absorption, Stability and Structure of NpO2+ Complexes with Dicarboxylic Acids  

E-Print Network [OSTI]

Np(V)/IDA complex, the absorption band still shows, but theOptical Absorption, Stability and Structure of NpO 2+and the intensity of the absorption band of NpO 2+ at 980 nm

Guoxin Tian; Linfeng Rao

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "absorption chiller research" 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

INFRARED ABSORPTION SPECTROSCOPY OF SURFACES: A LOW TEMPERATURE THERMAL DETECTION SCHEME  

E-Print Network [OSTI]

Frequency (l/CM) Fig. 5. Absorption spectrum of chemicallyFilm Frequency (l/CM) Fig. 6, Absorption spectrum of benzenei Fig. 7. -JU— (l/CM) Absorption spectrum of methane

Bailey, R. B.

2011-01-01T23:59:59.000Z

362

AN X-RAY ABSORPTION SPECTROSCOPY STUDY OF MANGANESE CONTAINING COMPOUNDS AND PHOTOSYNTHETIC SPINACH CHLOROPLASTS  

E-Print Network [OSTI]

II. Extended X-ray Absorption Fine Structure (EXAFS) TheoryIII. X-ray Absorption Spectroscopy (XAS) ExperimentIII. EXTENDED X-RAY ABSORPTION FINE STRUCTURE (EXAFS) DATA

Kirby, Jon Allan

2012-01-01T23:59:59.000Z

363

X-ray absorption study of the electronic structure of Mn-doped amorphous Si  

E-Print Network [OSTI]

X-ray absorption study of the electronic structure of Mn-?x ) is studied by X-ray absorption spectroscopy at the Mn Land featureless L 3,2 absorption peaks, corresponding to an

Zeng, Li

2008-01-01T23:59:59.000Z

364

An in-situ cell for characterization of solids by soft X-ray absorption  

E-Print Network [OSTI]

Scientific Instruments a Absorption (a.u. ) b d 0.01 abs cJ. Lynch, in X-ray Absorption Fine Structure for Catalysts18, pp. 431-512. X-ray Absorption: Principles, Applications,

2007-01-01T23:59:59.000Z

365

X-ray Absorption Spectroscopy Study of Prototype Chemical Systems: Theory vs. Experiment  

E-Print Network [OSTI]

acids by Near Edge X-ray Absorption Fine Structure (NEXAFS)X-ray Absorption Spectroscopy Study of Prototype ChemicalGlaeser Spring 2010 X-ray Absorption Spectroscopy Study of

Schwartz, Craig Philip

2010-01-01T23:59:59.000Z

366

X-ray absorption spectroscopy at the Ni-K edge in Stackhousia tryonii Bailey hyperaccumulator  

E-Print Network [OSTI]

X-ray absorption spectroscopy at the Ni–K edge inin vivo by micro x-ray absorption spectroscopy (XAS) at theNi–K edge. Both x-ray absorption near edge structure and

Kachenko, A.

2009-01-01T23:59:59.000Z

367

A measurement of the temperature dependence of the absorption edge of single crystals, using polarized light  

E-Print Network [OSTI]

. For comparison, the value of the shift in germanium is 3. 9 X 10 eV/'C. Yiork on photoconductivity at Hebrew University stimulated some optical research at the same university, involving absorption, specular reflectivity, and thermoluminescence measurements... QUARTZ / WINDOW FIG. I. DEWAR FLASK 23 50. S83 ELECTRONIC T UBE DIV ISION OF DUMONT LABORATORIES I O. I- W LIl t' I- V) Z tlJ V) I. O S-I GOOO 9000 WAVELENGTH-ANGSTROMS FIG. 2. SPECTRAL IAESPONSE 12000 1. 5 TEMPEPATURE 'K FIG. B...

Dunham, Robert Latham

1964-01-01T23:59:59.000Z

368

SUPERCOMPUTER EDUCATION AND RESEARCH CENTER LIST OF ITEMS FOR DISPOSAL  

E-Print Network [OSTI]

Machine 35. Water Chiller Unit 36. Assorted Circuit Boards 37. Various type of Power Supply 38. Keyboards. Ungermann Bass ­ Network Items 20. Personal Computers (CPU only) #12;21. Laptop/Think Pads 22. Heavy Duty Line Printers 23. Heavy Duty Laser Printers 24. Heavy Duty Colour Laser Printers 25. HP Draft Masters

Govindarajan, Ramaswamy

369

Present and Future Uses of Industrial Absorption Heat Pumps  

E-Print Network [OSTI]

This paper examines the present and projects the future uses of industrial absorption heat pumping. AHP technology is seen as an increasingly important component of plant and process heat integration for energy conservation. Existing installations...

Erickson, D. C.; Davidson, W. F.

370

Collision--induced absorption in dense atmospheres of cool stars  

SciTech Connect (OSTI)

In the atmosphere of the Sun the major interaction between the matter and the radiation is through light absorption by ions (predominantly the negative ion of hydrogen atoms), neutral atoms and a small amount of polar molecules. The majority of stars in the universe are, however, cooler and denser than our Sun, and for a large fraction of these, the above absorption processes are very weak. Here, collision-induced absorption (CIA) becomes the dominant opacity source. The radiation is absorbed during very short mutual passages ('collisions') of two non-polar molecules (and/or atoms), while their electric charge distributions are temporarily distorted which gives rise to a transient dipole moment. We present here a review of the present-day knowledge about the impact of collision-induced absorption processes on the structure and the spectrum of such stars.

Borysow, Aleksandra; Joergensen, Uffe Graae [Niels Bohr Institute, for Astronomy, Physics and Geophysics, University Observatory, Juliane Maries vej 30, DK-2100 Copenhagen (Denmark)

1999-04-01T23:59:59.000Z

371

Absorption Cycle Fundamentals and Applications Guidelines for Distillation Energy Savings  

E-Print Network [OSTI]

The absorption cycle offers one of the most economic and widely applicable technologies for waste heat upgrading. It can use off-the-shelf hardware that is available now, at any required capacity rating. Fractional distillations, as a class...

Erickson, D. C.; Davidson, W. F.

1984-01-01T23:59:59.000Z

372

Observation of suppressed terahertz absorption in photoexcited graphene  

E-Print Network [OSTI]

When light is absorbed by a semiconductor, photoexcited charge carriers enhance the absorption of far-infrared radiation due to intraband transitions. We observe the opposite behavior in monolayer graphene, a zero-gap ...

Frenzel, Alex James

373

absorptive cross sections: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

true metric. Sumit R. Das; Gary Gibbons; Samir D. Mathur 1996-09-06 16 Absorption Cross Section of Scalar Field in Supergravity Background HEP - Theory (arXiv) Summary: It has...

374

absorption cooling systems: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Line Systems Astrophysics (arXiv) Summary: A model of Lyman limit QSO absorption systems is investigated where they are produced in gaseous galactic halos with a two-phase...

375

absorption cooling system: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Line Systems Astrophysics (arXiv) Summary: A model of Lyman limit QSO absorption systems is investigated where they are produced in gaseous galactic halos with a two-phase...

376

Optical control of nuclear resonant absorption: theory and experiment  

E-Print Network [OSTI]

Modification of nuclear resonant absorption by means of laser radiation is analyzed both theoretically and experimentally. Theoretical analysis is done on the basis of four-level model of atom. This model includes both electronic and nuclear...

Kolesov, Roman L.

2004-09-30T23:59:59.000Z

377

Onsite Wastewater Treatment Systems: Septic Tank/Soil Absorption Field  

E-Print Network [OSTI]

For septic tank and soil absorption systems to work properly, homeowners must choose the right kind of system for their household size and soil type, and they must maintain them regularly. This publication explains the treatment, design, operation...

Lesikar, Bruce J.

2008-10-23T23:59:59.000Z

378

WATER-LITHIUM BROMIDE DOUBLE-EFFECT ABSORPTION COOLING ANALYSIS  

Office of Scientific and Technical Information (OSTI)

1980 Final Report f o r Contract: DE AC03-79SF10540 (Mu1 tiple-Effect Absorption Cycle Solar Cooling) with the U.S. Department of Energy DISCLAIMER This report was prepared as an...

379

absorption spectrophotometric characterization: Topics by E-print...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption spectrophotometric characterization First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Light...

380

absorption selected galaxies: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 The Nature and Evolution of Absorption-Selected Galaxies Astrophysics (arXiv) Summary: We present results of surveys for...

Note: This page contains sample records for the topic "absorption chiller research" 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

absorption distribution metabolism: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Intestinal Absorption and Metabolism of CiteSeer Summary: There are five possible processes of intestinal...

382

absorption spectroscopic characterization: Topics by E-print...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption spectroscopic characterization First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Confocal...

383

absorption spectroscopic studies: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption spectroscopic studies First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Electrical...

384

absorption renal function: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

style and content by: David K... Russo, Elizabeth Angela 2012-06-07 3 The resonance absorption probability function for neutron and multiplicative integral Nuclear Theory (arXiv)...

385

absorption des wasserstoffs: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

. . . . . . . . 41 3.2.2 Kristallines Eis im Volumen Wolf, Martin 5 ABSORPTION PHOTOLECTRIQUE DES RAYONS 03B3 DANS LA COUCHE L DES ATOMES Par Mme NADINE MARTY....

386

absorption lidar dial: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Topic Index 1 Development of an eye-safe diode-laser-based micro-pulse differential absorption lidar (MP-dial) for atmospheric water-vapor and aerosol studies. Open Access Theses...

387

Absorption of ac fields in amorphous indium-oxide films  

SciTech Connect (OSTI)

Absorption data from applied ac fields in Anderson-localized amorphous indium-oxide (In{sub x}O) films are shown to be frequency and disorder dependent. The absorption shows a roll-off at a frequency which is much lower than the electron-electron scattering rate of the material when it is in the diffusive regime. This is interpreted as evidence for discreteness of the energy spectrum of the deeply localized regime. This is consistent with recent many-body localization scenarios. As the metal-insulator transition is approached, the absorption shifts to higher frequencies. Comparing with the previously obtained results on the crystalline version of indium-oxide (In{sub 2}O{sub 3?x}) implies a considerably higher inelastic electron-phonon scattering rate in the amorphous material. The range over which the absorption versus frequency decreases may indicate that a wide distribution of localization length is a common feature in these systems.

Ovadyahu, Z. [Racah Institute of Physics, the Hebrew University, Jerusalem 91904 (Israel)

2014-08-20T23:59:59.000Z

388

Spectral properties of microwave graphs with local absorption  

E-Print Network [OSTI]

The influence of absorption on the spectra of microwave graphs has been studied experimentally. The microwave networks were made up of coaxial cables and T junctions. First, absorption was introduced by attaching a 50 Ohm load to an additional vertex for graphs with and without time-reversal symmetry. The resulting level-spacing distributions were compared with a generalization of the Wigner surmise in the presence of open channels proposed recently by Poli et al. [Phys. Rev. Lett. 108, 174101 (2012)]. Good agreement was found using an effective coupling parameter. Second, absorption was introduced along one individual bond via a variable microwave attenuator, and the influence of absorption on the length spectrum was studied. The peak heights in the length spectra corresponding to orbits avoiding the absorber were found to be independent of the attenuation, whereas, the heights of the peaks belonging to orbits passing the absorber once or twice showed the expected decrease with increasing attenuation.

M. Allgaier; S. Gehler; S. Barkhofen; H. -J. Stöckmann; U. Kuhl

2014-03-30T23:59:59.000Z

389

Direct and quantitative photothermal absorption spectroscopy of individual particulates  

SciTech Connect (OSTI)

Photonic structures can exhibit significant absorption enhancement when an object's length scale is comparable to or smaller than the wavelength of light. This property has enabled photonic structures to be an integral component in many applications such as solar cells, light emitting diodes, and photothermal therapy. To characterize this enhancement at the single particulate level, conventional methods have consisted of indirect or qualitative approaches which are often limited to certain sample types. To overcome these limitations, we used a bilayer cantilever to directly and quantitatively measure the spectral absorption efficiency of a single silicon microwire in the visible wavelength range. We demonstrate an absorption enhancement on a per unit volume basis compared to a thin film, which shows good agreement with Mie theory calculations. This approach offers a quantitative approach for broadband absorption measurements on a wide range of photonic structures of different geometric and material compositions.

Tong, Jonathan K.; Hsu, Wei-Chun; Eon Han, Sang; Burg, Brian R.; Chen, Gang, E-mail: gchen2@mit.edu [Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)] [Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States); Zheng, Ruiting [Key Laboratory of Radiation Beam Technology and Materials Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875 (China)] [Key Laboratory of Radiation Beam Technology and Materials Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875 (China); Shen, Sheng [Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213 (United States)] [Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213 (United States)

2013-12-23T23:59:59.000Z

390

absorption spectrophotometric determination: Topics by E-print...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption spectrophotometric determination First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Light...

391

Multi-Phase Galaxy Formation and Quasar Absorption Systems  

E-Print Network [OSTI]

The central problem of galaxy formation is understanding the cooling and condensation of gas in dark matter halos. It is now clear that to match observations this requires further physics than the simple assumptions of single phase gas cooling. A model of multi-phase cooling (Maller & Bullock 2004) can successfully account for the upper cutoff in the masses of galaxies and provides a natural explanation of many types of absorption systems (Mo & Miralda-Escude 1996). Absorption systems are our best probes of the gaseous content of galaxy halos and therefore provide important constraints on models for gas cooling into galaxies. All physical processes that effect gas cooling redistribute gas and therefore are detectable in absorption systems. Detailed studies of the nature of gas in galaxy halos using absorption systems are crucial for building a correct theory of galaxy formation.

Ariyeh H. Maller

2005-05-06T23:59:59.000Z

392

absorption spectroscopy study: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 On Automatic Absorption Detection for Imaging Spectroscopy: A Comparative Study Computer Technologies and...

393

On the limiting absorption principle and spectra of quantum graphs  

E-Print Network [OSTI]

The main result of the article is validity of the limiting absorption principle and thus absence of the singular continuous spectrum for compact quantum graphs with several infinite leads attached. The technique used involves Dirichlet-to-Neumann operators.

Beng-Seong Ong

2005-10-10T23:59:59.000Z

394

absorption spectroscopic investigation: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

20 21 22 23 24 25 Next Page Last Page Topic Index 1 Raman Spectroscopic and Visible Absorption Investigation of LiCrSi2O6 Pyroxene Under Pressure Geosciences Websites Summary:...

395

The impact of biogenic carbon emissions on aerosol absorption inMexico City  

SciTech Connect (OSTI)

In order to determine the wavelength dependence of atmospheric aerosol absorption in the Mexico City area, the absorption angstrom exponents (AAEs) were calculated from aerosol absorption measurements at seven wavelengths obtained with a seven-channel aethalometer during two field campaigns, the Mexico City Metropolitan Area study in April 2003 (MCMA 2003) and the Megacity Initiative: Local and Global Research Observations in March 2006 (MILAGRO). The AAEs varied from 0.76 to 1.56 in 2003 and from 0.54 to 1.52 in 2006. The AAE values determined in the afternoon were consistently higher than the corresponding morning values, suggesting the photochemical formation of absorbing secondary organic aerosols (SOA) in the afternoon. The AAE values were compared to stable and radiocarbon isotopic measurements of aerosol samples collected at the same time to determine the sources of the aerosol carbon. The fraction of modern carbon (fM) in the aerosol samples, as determined from {sup 14}C analysis, showed that 70% of the carbonaceous aerosols in Mexico City were from modern sources, indicating a significant impact from biomass burning during both field campaigns. The {sup 13}C/{sup 12}C ratios of the aerosol samples illustrate the significant impact of Yucatan forest fires (C-3 plants) in 2003 and local grass fires (C-4 plants) at site T1 in 2006. A direct comparison of the fM values, stable carbon isotope ratios, and calculated aerosol AAEs suggested that the wavelength dependence of the aerosol absorption was controlled by the biogenically derived aerosol components.

Marley, N; Gaffney, J; Tackett, M J; Sturchio, N; Hearty, L; Martinez, N; Hardy, K D; Machany-Rivera, A; Guilderson, T P; MacMillan, A; Steelman, K

2009-02-24T23:59:59.000Z

396

Metal Absorption Systems in Spectra of Pairs of QSOs  

E-Print Network [OSTI]

We present the first large sample of absorption systems in paired QSOs consisting of 691 absorption systems in the spectra of 310 QSOs including 170 pairings. All these absorption systems have metal lines, usually C IV or Mg II. We see 17 cases of absorption in one line-of-sight within 200 km/s (1 Mpc) of absorption in the paired line-of-sight with the probability at least approx 50% at 100kpc, declining rapidly to 23% at 100 - 200 kpc. We detect clustering on 0.5Mpc scales and see a hint of the "fingers of God" redshift-space distortion. The distribution matches absorbers arising in galaxies at z=2 with a normal correlation function and systematic infall velocities but unusually low random pair-wise velocity differences. Absorption in gas flowing out from galaxies at a mean velocity of 250 km/s would produce vastly more elongation than we see. The UV absorption from fast winds that Adelberger et al. 2005 see in spectra of LBGs is not representative of the absorption that we see. Either the winds are confined to LBGs, or they can not extend to 40 kpc with large velocities, while continuing to make UV absorption we see, implying most metals were in place in the IGM long before z=2. Separately, when we examine the absorption seen when a sight line passes a second QSO, we see 19 absorbers within 400 km/s of the partner QSO. The probability of seeing absorption is approximately constant for impact parameters 0.1 - 1.5 Mpc. Perhaps we do not see a rapid rise in the probability at small impact parameters because the UV from QSOs destroys some absorbers near to the QSOs. The 3D distribution of 64 absorbers around 313 QSOs is to first order isotropic, with just a hint of the anisotropy expected if the QSO UV emission is beamed, or alternatively QSOs might emit UV isotropically but for a surprisingly short time of only 0.3Myr.

David Tytler; Mark Gleed; Carl Melis; Angela Chapman; David Kirkman; Dan Lubin; Pascal Paschos; Tridivesh Jena; Arlin P. S. Crotts

2007-11-17T23:59:59.000Z

397

Ultra-Thin Metal Films for Enhanced Solar Absorption  

E-Print Network [OSTI]

This paper presents modelled results for optical absorption in ultra-thin films of nickel, gold and silver over the solar spectrum. It is found in the case of nickel there is an optimum thickness for maximum solar absorption around 10-13nm. This effect is not observed for gold or silver. It is postulated that this is an interference effect occurring due the particular real and imaginary refractive profile of nickel across the solar spectrum.

Ahmad, N; Teng, M; Cryan, M J

2012-01-01T23:59:59.000Z

398

Active Reflection Absorption for a Three Dimensional Multidirectional Wave Generator  

E-Print Network [OSTI]

ACTIVE REFLECTION ABSORPTION FOR A THREE DIMENSIONAL MULTIDIRECTIONAL WAVE GENERATOR A Dissertation by OSCAR CRUZ CASTRO Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirements for the degree of DOCTOR OF PHILOSOPHY August 2009 Major Subject: Ocean Engineering ACTIVE REFLECTION ABSORPTION FOR A THREE DIMENSIONAL MULTIDIRECTIONAL WAVE GENERATOR A Dissertation by OSCAR CRUZ CASTRO Submitted...

Cruz Castro, Oscar

2010-10-12T23:59:59.000Z

399

Absorption of sound in liquids and liquid mixtures  

E-Print Network [OSTI]

ABSORPTION OF SOUND IN LIQUIDS AND LIQUID MIXTURES A Thesis Raiq S. causa Approved as to style and content by: (Chairman of Committee) January 1955 L1BRARY A 4 M COLLEOE OF IEXAS ADSORPTION OF SOfP@ LIQUIDS AND LIQUID NIXTURES A Thesis... Introduction to the Problem Experimental Methods and Procedures Results Discussion of Results Acknowledgements Bib 1 io graphy 22 4I 42 Introduction to the Problem The study of sound absorption in liquids and liquid mixtures is of considerable...

Musa, Raiq S

2012-06-07T23:59:59.000Z

400

E-Print Network 3.0 - absorption spectroscopies progress Sample...  

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nanoantenna arrays Summary: absorption (SEIRA) spectroscopy (7-14). Until recently, the bulk of SEIRA studies have revolved around... collectively en- hanced IR absorption...

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401

E-Print Network 3.0 - absorption root Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

made of? Green roof benefits: Insulates building,lowering heating costs Absorption of rainwater... Absorption of air pollution Extends life of roof Provides habitat for birds...

402

E-Print Network 3.0 - absorptivity optical Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Polarization dependent optical absorption properties of single-walled carbon nanotubes (SWNTs) have been... of these absorption peaks and their important relevance ......

403

E-Print Network 3.0 - absorption refrigeration machines Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

refrigeration systems (2-3) htm systems (2-3) Thermo... ) Absorption: used more for air conditioning and for refrigeration- Absorption: used more for air conditioning... air...

404

E-Print Network 3.0 - absorption refrigerating machine Sample...  

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refrigeration systems (2-3) htm systems (2-3) Thermo... ) Absorption: used more for air conditioning and for refrigeration- Absorption: used more for air conditioning... air...

405

E-Print Network 3.0 - absorption spectrometry detection Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Trace Elements in Biological Tissues by Summary: Block Digestion and Spike-Height Flame Atomic Absorption Spectrometry ,.. U. TINGGI AND W. MAHER School... absorption...

406

E-Print Network 3.0 - atomization atomic absorption Sample Search...  

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atomic absorption Search Powered by Explorit Topic List Advanced Search Sample search results for: atomization atomic absorption Page: << < 1 2 3 4 5 > >> 1 :coherently trapped in...

407

E-Print Network 3.0 - atomic absorption technique Sample Search...  

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Search Powered by Explorit Topic List Advanced Search Sample search results for: atomic absorption technique Page: << < 1 2 3 4 5 > >> 1 Xray Absorption Near Edge...

408

E-Print Network 3.0 - absorption spectrometry fi-aas Sample Search...  

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Trace Elements in Biological Tissues by Summary: Block Digestion and Spike-Height Flame Atomic Absorption Spectrometry ,.. U. TINGGI AND W. MAHER School... absorption...

409

E-Print Network 3.0 - active potassium absorption Sample Search...  

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decomposed in a heated carbon-tube furnace, and arsenic determined by measurement of its atomic-absorption... in its determination by atomic- absorption spectroscopy. Various...

410

E-Print Network 3.0 - absorption spectrometry technique Sample...  

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Trace Elements in Biological Tissues by Summary: Block Digestion and Spike-Height Flame Atomic Absorption Spectrometry ,.. U. TINGGI AND W. MAHER School... absorption...

411

E-Print Network 3.0 - absorption spectroscopy techniques Sample...  

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A partial sampling of these techniques includes: Absorption spectroscopy Atomic absorption... 109 3.4 Spectroscopic Sensors Spectroscopy is the scientific study of...

412

E-Print Network 3.0 - absorption va vibrational Sample Search...  

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of a protein, which deviate only... direct insights into the reaction mechanism at the atomic level. Absorption spectrum of a protein... In Figure 1 a typical absorption...

413

E-Print Network 3.0 - absorption spectrometry faas Sample Search...  

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and Marco A. Z. Arruda* Summary: for metal determination is normally carried out by flame atomic absorption spectrometry (FAAS). The main... atomic absorption spectrometry (FAAS)...

414

E-Print Network 3.0 - acid absorption acceleration Sample Search...  

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acids, the ligands and specific... direct insights into the reaction mechanism at the atomic level. Absorption spectrum of a protein... In Figure 1 a typical absorption...

415

E-Print Network 3.0 - absorption protein npc1l1 Sample Search...  

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to proteins. Based on Summary: direct insights into the reaction mechanism at the atomic level. Absorption spectrum of a protein... In Figure 1 a typical absorption...

416

E-Print Network 3.0 - absorption spectrometry f-aas Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Trace Elements in Biological Tissues by Summary: Block Digestion and Spike-Height Flame Atomic Absorption Spectrometry ,.. U. TINGGI AND W. MAHER School... absorption...

417

E-Print Network 3.0 - atomic absorption determination Sample...  

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Search Powered by Explorit Topic List Advanced Search Sample search results for: atomic absorption determination Page: << < 1 2 3 4 5 > >> 1 Extended Xray Absorption Fine...

418

E-Print Network 3.0 - absorption spectrom- etry Sample Search...  

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by Summary: is used to digest samples and elements are determined by spike-height flame atomic absorption spectrom... Block Digestion and Spike-Height Flame Atomic Absorption...

419

E-Print Network 3.0 - absorption spectrum aided Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

to proteins. Based on Summary: direct insights into the reaction mechanism at the atomic level. Absorption spectrum of a protein... In Figure 1 a typical absorption...

420

E-Print Network 3.0 - absorption Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

to proteins. Based on Summary: direct insights into the reaction mechanism at the atomic level. Absorption spectrum of a protein... In Figure 1 a typical absorption...

Note: This page contains sample records for the topic "absorption chiller research" 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.


421

E-Print Network 3.0 - atomic absorption spectroscopy Sample Search...  

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Search Powered by Explorit Topic List Advanced Search Sample search results for: atomic absorption spectroscopy Page: << < 1 2 3 4 5 > >> 1 Xray Absorption Near Edge...

422

E-Print Network 3.0 - absorptivity Sample Search Results  

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to proteins. Based on Summary: direct insights into the reaction mechanism at the atomic level. Absorption spectrum of a protein... In Figure 1 a typical absorption...

423

E-Print Network 3.0 - absorption spectrometry method Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Trace Elements in Biological Tissues by Summary: Block Digestion and Spike-Height Flame Atomic Absorption Spectrometry ,.. U. TINGGI AND W. MAHER School... absorption...

424

E-Print Network 3.0 - absorption leaves Sample Search Results  

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ABSORPTIVE RATES W. Brian Dade, Peter A. Jumars... source of the material and energy for this escalation in heterotrophs with digestive tracts is absorption... be...

425

A survey for redshifted molecular and atomic absorption lines I  

E-Print Network [OSTI]

We are currently undertaking a large survey for redshifted atomic and molecular absorption ... only one clear and one tentative detection were obtained: HI absorption at z = 0.097 in PKS 1555-140 and OH absorption at z =0.126 in PKS 2300-189, respectively... In order to determine why no clear molecular absorption was detected in any of the 13 sources searched, we investigate the properties of the five redshifted systems currently known to exhibit OH absorption. In four of these, molecules were first detected via millimetre-wave transitions and the flat radio spectra indicate compact background continuum sources, which may suggest a high degree of coverage of the background source by the molecular clouds in the absorber. Furthermore, for these systems we find a relationship between the molecular line strength and red optical--near infrared (V-K) colours, thus supporting the notion that the reddening of these sources is due to dust, which provides an environment conducive to the formation of molecules. Upon comparison with the V-K colours of our sample, this relationship suggests that, presuming the reddening occurs at the host galaxy redshift at least in some of the targets, many of our observations still fall short of the sensitivityrequired to detect OH absorption, although a confirmation of the ``detection'' of OH in 2300-189 could contravene this.

S. J. Curran; M. T. Whiting; M. T. Murphy; J. K. Webb; S. N. Longmore; Y. M. Pihlstroem; R. Athreya; C. Blake

2006-07-26T23:59:59.000Z

426

Near-infrared free carrier absorption in heavily doped silicon  

SciTech Connect (OSTI)

Free carrier absorption in heavily doped silicon can have a significant impact on devices operating in the infrared. In the near infrared, the free carrier absorption process can compete with band to band absorption processes, thereby reducing the number of available photons to optoelectronic devices such as solar cells. In this work, we fabricate 18 heavily doped regions by phosphorus and boron diffusion into planar polished silicon wafers; the simple sample structure facilitates accurate and precise measurement of the free carrier absorptance. We measure and model reflectance and transmittance dispersion to arrive at a parameterisation for the free carrier absorption coefficient that applies in the wavelength range between 1000 and 1500?nm, and the range of dopant densities between ?10{sup 18} and 3?×?10{sup 20}?cm{sup ?3}. Our measurements indicate that previously published parameterisations underestimate the free carrier absorptance in phosphorus diffusions. On the other hand, published parameterisations are generally consistent with our measurements and model for boron diffusions. Our new model is the first to be assigned uncertainty and is well-suited to routine device analysis.

Baker-Finch, Simeon C., E-mail: simeon.bakerfinch@gmail.com [School of Engineering, Australian National University, Canberra, ACT 0200 (Australia); PV Lighthouse, Coledale, NSW 2515 (Australia); McIntosh, Keith R. [PV Lighthouse, Coledale, NSW 2515 (Australia); Yan, Di; Fong, Kean Chern; Kho, Teng C. [School of Engineering, Australian National University, Canberra, ACT 0200 (Australia)

2014-08-14T23:59:59.000Z

427

U.S. Department of Energy Categorical Exclusion Determination...  

Broader source: Energy.gov (indexed) [DOE]

05) Pacific Northwest National Laboratory- Gensel Heat Recovery Adsorption Chiller for Navy Forward Operations Bases Program or Field Office: Advanced Research Projects Agency-...

428

Research Statement  

E-Print Network [OSTI]

entries in the natural numbers, into an undergraduate research project. ..... and developing the undergraduate research project described at the end of Section 2,

2015-01-18T23:59:59.000Z

429

Research Highlight  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Madden-Julian Oscillation Heating: to Tilt or Not to Tilt For original submission and image(s), see ARM Research Highlights http:www.arm.govsciencehighlights Research...

430

Research Library  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

LANL Research Library: delivering essential knowledge services for national security sciences since 1947 About the Research Library The Basics Mission We deliver agile, responsive...

431

Discovery of H alpha absorption in the unusual broad absorption line quasar SDSS J083942.11+380526.3  

E-Print Network [OSTI]

We discovered an H alpha absorption in a broad H alpha emission line of an unusual broad absorption line quasar, SDSS J083942.11+380526.3 at z=2.318, by near-infrared spectroscopy with the Cooled Infrared Spectrograph and Camera for OHS (CISCO) on the Subaru telescope. The Presence of non-stellar H alpha absorption is known only in the Seyfert galaxy NGC 4151 to date, thus our discovery is the first case for quasars. The H alpha absorption line is blueshifted by 520 km/s relative to the H alpha emission line, and its redshift almost coincides with those of UV low-ionization metal absorption lines. The width of the H alpha absorption (~ 340 km/s) is similar to those of the UV low-ionization absorption lines. These facts suggest that the H alpha and the low-ionization metal absorption lines are produced by the same low-ionization gas which has a substantial amount of neutral gas. The column density of the neutral hydrogen is estimated to be ~ 10^18 cm^-2 by assuming a gas temperature of 10,000 K from the analysis of the curve of growth. The continuum spectrum is reproduced by a reddened (E(B-V) ~ 0.15 mag for the SMC-like reddening law) composite quasar spectrum. Furthermore, the UV spectrum of SDSS J083942.11+380526.3 shows a remarkable similarity to that of NGC 4151 in its low state, suggesting the physical condition of the absorber in SDSS J083942.11+380526.3 is similar to that of NGC 4151 in the low state. As proposed for NGC 4151, SDSS J083942.11+380526.3 may be also seen through the close direction of the surface of the obscuring torus.

Kentaro Aoki; Ikuru Iwata; Kouji Ohta; Masataka Ando; Masayuki Akiyama; Naoyuki Tamura

2006-07-04T23:59:59.000Z

432

* rFiLE COpY NBSIR 84-2816 L  

E-Print Network [OSTI]

, Director #12;ABSTRACT An absorption water chiller and an absorption heat pump were extensively tested under was more closely investigated employing the absorption heat pump. Key Words: Absorption heat pump Appendix .... . .... ...... .......... 15 PART II - TESTING OF THE ABSORPTION HEAT PUMP Introduction

Oak Ridge National Laboratory

433

X-RAY ABSORPTION OF HIGH-REDSHIFT QUASARS  

SciTech Connect (OSTI)

The soft X-ray photoelectric absorption of high-z quasars has been known for two decades, but has no unambiguous astrophysical context. We construct the largest sample to date of 58 high-redshift quasars (z > 0.45) selected from the XMM-Newton archive based on a high photon count criterion (>1800). We measure the optical depth {tau} at 0.5 keV and find that 43% of the quasars show significant absorption. We aim to find which physical parameters of the quasars, e.g., redshift, radio luminosity, radio loudness, or X-ray luminosity, drive their observed absorption. We compare the absorption behavior with redshift with the pattern expected if the diffuse intergalactic medium (IGM) is responsible for the observed absorption. We also compare the absorption with a comparison sample of gamma-ray burst (GRB) X-ray afterglows. Although the z > 2 quasar opacity is consistent with diffuse IGM absorption, many intermediate-z (0.45 < z < 2) quasars are not sufficiently absorbed for this scenario, and are appreciably less absorbed than GRBs. Only 10/37 quasars at z < 2 are absorbed, and only 5/30 radio-quiet quasars are absorbed. We find a weak correlation between {tau} and z, and an even weaker correlation between {tau} and radio luminosity. These findings lead to the conclusion that although a diffuse IGM origin for the quasar absorption is unlikely, the optical depth does seem to increase with redshift, roughly as (1 + z){sup 2.2{+-}0.6}, tending to {tau} Almost-Equal-To 0.4 at high redshifts, similar to the high-z GRBs. This result can be explained by an ionized and clumpy IGM at z < 2, and a cold, diffuse IGM at higher redshift. If, conversely, the absorption occurs at the quasar, and owing to the steep L{sub x} {proportional_to}(1 + z){sup 7.1{+-}0.5} correlation in the present sample, the host column density scales as N{sub H}{proportional_to}L{sub x}{sup 0.7{+-}0.1}.

Eitan, Assaf; Behar, Ehud, E-mail: sassafe@tx.technion.ac.il, E-mail: behar@physics.technion.ac.il [Physics Department, Technion, Haifa 32000 (Israel)

2013-09-01T23:59:59.000Z

434

Method and apparatus for aerosol particle absorption spectroscopy  

DOE Patents [OSTI]

A method and apparatus for determining the absorption spectra, and other properties, of aerosol particles. A heating beam source provides a beam of electromagnetic energy which is scanned through the region of the spectrum which is of interest. Particles exposed to the heating beam which have absorption bands within the band width of the heating beam absorb energy from the beam. The particles are also illuminated by light of a wave length such that the light is scattered by the particles. The absorption spectra of the particles can thus be determined from an analysis of the scattered light since the absorption of energy by the particles will affect the way the light is scattered. Preferably the heating beam is modulated to simplify the analysis of the scattered light. In one embodiment the heating beam is intensity modulated so that the scattered light will also be intensity modulated when the particles absorb energy. In another embodiment the heating beam passes through an interferometer and the scattered light reflects the Fourier Transform of the absorption spectra.

Campillo, Anthony J. (Nesconset, NY); Lin, Horn-Bond (Manorville, NY)

1983-11-15T23:59:59.000Z

435

Absorption Mode FT-ICR Mass Spectrometry Imaging  

SciTech Connect (OSTI)

Fourier transform ion cyclotron resonance mass spectrometry offers the highest mass resolving power for molecular imaging experiments. This high mass resolving power ensures that closely spaced peaks at the same nominal mass are resolved for proper image generation. Typically higher magnetic fields are used to increase mass resolving power. However, a gain in mass resolving power can also be realized by phase correction of the data for absorption mode display. In addition to mass resolving power, absorption mode offers higher mass accuracy and signal-to-noise ratio over the conventional magnitude mode. Here we present the first use of absorption mode for Fourier transform ion cyclotron resonance mass spectrometry imaging. The Autophaser algorithm is used to phase correct each spectrum (pixel) in the image and then these parameters are used by the Chameleon work-flow based data processing software to generate absorption mode ?Datacubes? for image and spectral viewing. Absorption mode reveals new mass and spatial features that are not resolved in magnitude mode and results in improved selected ion image contrast.

Smith, Donald F.; Kilgour, David P.; Konijnenburg, Marco; O'Connor, Peter B.; Heeren, Ronald M.

2013-12-03T23:59:59.000Z

436

Development of an Ionic-Liquid Absorption Heat Pump  

SciTech Connect (OSTI)

Solar Fueled Products (SFP) is developing an innovative ionic-liquid absorption heat pump (ILAHP). The development of an ILAHP is extremely significant, as it could result in annual savings of more than 190 billion kW h of electrical energy and $19 billion. This absorption cooler uses about 75 percent less electricity than conventional cooling and heating units. The ILAHP also has significant environmental sustainability benefits, due to reduced CO2 emissions. Phase I established the feasibility and showed the economic viability of an ILAHP with these key accomplishments: • Used the breakthrough capabilities provided by ionic liquids which overcome the key difficulties of the common absorption coolers. • Showed that the theoretical thermodynamic performance of an ILAHP is similar to existing absorption-cooling systems. • Established that the half-effect absorption cycle reduces the peak generator temperature, improving collector efficiency and reducing collector area. • Component testing demonstrated that the most critical components, absorber and generator, operate well with conventional heat exchangers. • Showed the economic viability of an ILAHP. The significant energy savings, sustainability benefits, and economic viability are compelling reasons to continue the ILAHP development.

Holcomb, Don

2011-03-29T23:59:59.000Z

437

E-Print Network 3.0 - absorption heat pumps Sample Search Results  

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pumps Search Powered by Explorit Topic List Advanced Search Sample search results for: absorption heat pumps...

438

Cavity-induced two-photon absorption in unidentical atoms M. S. Kim1,  

E-Print Network [OSTI]

Cavity-induced two-photon absorption in unidentical atoms M. S. Kim1, * and G. S. Agarwal1,2 1 Max-photon absorption in unidentical atoms, and demonstrate the nonclassical character of this two-photon absorption. We-photon absorption in two unidentical atoms in a cavity. In a cavity the atoms interact with a common quantized

Kim, Myungshik

439

E-Print Network 3.0 - atomic absorption method Sample Search...  

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method Search Powered by Explorit Topic List Advanced Search Sample search results for: atomic absorption method...

440

E-Print Network 3.0 - atomic absorption spectrometr Sample Search...  

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spectrometr Search Powered by Explorit Topic List Advanced Search Sample search results for: atomic absorption spectrometr...

Note: This page contains sample records for the topic "absorption chiller research" 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.


441

E-Print Network 3.0 - atomic absorption spectrometric Sample...  

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spectrometric Search Powered by Explorit Topic List Advanced Search Sample search results for: atomic absorption spectrometric...

442

E-Print Network 3.0 - atomic absorption methods Sample Search...  

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methods Search Powered by Explorit Topic List Advanced Search Sample search results for: atomic absorption methods...

443

Absorption of solar radiation by the cloudy atmosphere: Further interpretations of collocated aircraft measurements  

E-Print Network [OSTI]

Absorption of solar radiation by the cloudy atmosphere: Further interpretations of collocated%) of this enhanced cloud absorption occurs at wavelengths 680 nm, and that the observed cloud absorption does stated, the purpose of ARESE was to address the issue of cloud shortwave (SW) absorption. Do clouds

Zender, Charles

444

ABSORPTION LINES IN THE SPECTRA OF DISTANT OBJECTS 1 John N. Bahcall  

E-Print Network [OSTI]

ABSORPTION LINES IN THE SPECTRA OF DISTANT OBJECTS 1 John N. Bahcall Institute for Advanced Study) of absorption-line systems which may be expected to occur in the spectra of distant objects. Absorption in the spectra of quasars and BL LAC objects. However, the fact that quasars exhibit rich absorption spectra

Bahcall, John

445

Quantification of rapid environmental redox processes with quick-scanning x-ray absorption  

E-Print Network [OSTI]

Quantification of rapid environmental redox processes with quick-scanning x-ray absorption. Here we apply quick-scanning x-ray absorption spectroscopy (Q-XAS), at sub-second time that can be measured using x-ray absorption spectroscopy. arsenic extended x-ray absorption fine structure

Sparks, Donald L.

446

Backscatter absorption gas imaging systems and light sources therefore  

DOE Patents [OSTI]

The location of gases that are not visible to the unaided human eye can be determined using tuned light sources that spectroscopically probe the gases and cameras that can provide images corresponding to the absorption of the gases. The present invention is a light source for a backscatter absorption gas imaging (BAGI) system, and a light source incorporating the light source, that can be used to remotely detect and produce images of "invisible" gases. The inventive light source has a light producing element, an optical amplifier, and an optical parametric oscillator to generate wavelength tunable light in the IR. By using a multi-mode light source and an amplifier that operates using 915 nm pump sources, the power consumption of the light source is reduced to a level that can be operated by batteries for long periods of time. In addition, the light source is tunable over the absorption bands of many hydrocarbons, making it useful for detecting hazardous gases.

Kulp, Thomas Jan (Livermore, CA); Kliner, Dahv A. V. (San Ramon, CA); Sommers, Ricky (Oakley, CA); Goers, Uta-Barbara (Campbell, NY); Armstrong, Karla M. (Livermore, CA)

2006-12-19T23:59:59.000Z

447

Fundamentals of PV Efficiency: Limits for Light Absorption  

E-Print Network [OSTI]

A simple thermodynamic argument related to a (weakly absorbing) finite dielectric slab illuminated by sunlight- originally suggested by Yablonovich- leads to the conclusion that the absorption in a dielectric can at best be increased by a factor 4n2. Therefore, the absorption in these materials is always imperfect; the Shockley-Queisser limit can be achieved only asymptotically. In this paper, we make the connection between the degradation in efficiency and the Yablonovich limit explicit and re-derive the 4n2 limit by intuitive geometrical arguments based on Snell's law and elementary rules of probability. Remarkably, the re-derivation suggests strategies of breaking the traditional limit and improving PV efficiency by enhanced light absorption.

M. Ryyan Khan; Xufeng Wang; Muhammad A. Alam

2012-12-13T23:59:59.000Z

448

Quantized Media with Absorptive Scatterers and Modified Atomic Emission Rates  

E-Print Network [OSTI]

Modifications in the spontaneous emission rate of an excited atom that are caused by extinction effects in a nearby dielectric medium are analyzed in a quantummechanical model, in which the medium consists of spherical scatterers with absorptive properties. Use of the dyadic Green function of the electromagnetic field near a a dielectric sphere leads to an expression for the change in the emission rate as a series of multipole contributions for which analytical formulas are obtained. The results for the modified emission rate as a function of the distance between the excited atom and the dielectric medium show the influence of both absorption and scattering processes.

L. G. Suttorp; A. J. van Wonderen

2011-02-14T23:59:59.000Z

449

Absorption of scalars by extremal black holes in string theory  

E-Print Network [OSTI]

We show that the low frequency absorption cross section of minimally coupled massless scalar fields by extremal spherically symmetric black holes in d dimensions in the presence of string-theoretical alpha' corrections is equal to the horizon area. Classically one has the relation sigma=4GS between the absorption cross section and the black hole entropy. We discuss the validity of such relation in the presence of alpha' corrections for extremal black holes, both nonsupersymmetric and supersymmetric. The examples we consider seem to indicate that this relation is verified in the presence of alpha' corrections for supersymmetric black holes, but not for nonsupersymmetric ones.

Filipe Moura

2014-06-13T23:59:59.000Z

450

Lower bounds on the absorption probability of beam splitters  

E-Print Network [OSTI]

We derive a lower limit to the amount of absorptive loss present in passive linear optical devices such as a beam splitter. We choose a particularly simple beam splitter geometry, a single planar slab surrounded by vacuum, which already reveals the important features of the theory. It is shown that, using general causality requirements and statistical arguments, the lower bound depends on the frequency of the incident light and the transverse resonance frequency of a suitably chosen single-resonance model only. For symmetric beam splitters and reasonable assumptions on the resonance frequency $\\omega_T$, the lower absorption bound is $p_{\\min}\\approx 10^{-6}(\\omega/\\omega_T)^4$.

Stefan Scheel

2005-08-25T23:59:59.000Z

451

High-frequency absorption and gain in superlattices: Semiquasistatic approach  

E-Print Network [OSTI]

We consider a generation and an amplification of THz radiation in semiconductor superlattices under the action of microwave pump field. Electrons belonging to a single miniband of the superlattice interact quasistatically with the pump field and dynamically with a signal THz field. Within this semiquasistic approach we derive elegant difference formulas describing absorption (gain) of the weak THz signal. We present an instructive geometric interpretation of the absorption formulas which allows a search of optimum conditions for the gain employing only a simple qualitative analysis. Our theoretical findings contribute to the development of sources and detectors of THz radiation that are using nonlinear electric properties of semiconductor superlattices.

A. V. Shorokhov; K. N. Alekseev

2006-02-08T23:59:59.000Z

452

Two and three nucleon K- absorption in nuclei  

E-Print Network [OSTI]

We analyze the peaks in the (Lambda p) and (Lambda d) invariant mass distributions, observed in recent FINUDA experiments and claimed to be signals of deeply bound kaonic states, and find them to be naturally explained in terms of K- absorption by two or three nucleons leaving the rest of the original nuclei as spectator. For reactions on heavy nuclei, the subsequent interactions of the particles produced in the primary absorption process with the residual nucleus play an important role. Thus at present there is no experimental evidence of deeply bound K- states in nuclei. However some new physics can be extracted from the data of FINUDA experiments.

V. K. Magas; E. Oset; A. Ramos

2010-03-24T23:59:59.000Z

453

Optimizing frequency dispersed transient absorption signals: A computational study  

E-Print Network [OSTI]

control of molecular dynamics is studied theoretically by focusing on optical excitation and wave packet stimulated emission or excited state absorption. By applying Optimal Control Theory the concept is demonstrated for a prototypical molecular three level system, whereby a flexible technique is suggested to form

Röder, Beate

454

Atomistic Models for the absorption of Oil Production Chemicals on  

E-Print Network [OSTI]

Atomistic Models for the absorption of Oil Production Chemicals on Clay minerals Sungu Hwang, Mario The atomistic simulation of the minerals in oil production Prediction of the performance of the oil production: a model for oil -19 -18 -17 -16 -15 -14 0 0.2 0.4 0.6 0.8 1 Coverage Bindingenergyper adsorbate

Goddard III, William A.

455

Absorption spectroscopy of individual single-walled carbon nanotubes  

E-Print Network [OSTI]

Absorption spectroscopy of individual single-walled carbon nanotubes Stéphane Berciaud,a Laurent-walled carbon nanotubes (SWNTs) lead to heterogeneous samples containing mixtures of metallic and semiconducting species with a variety of lengths and defects. Optical detection at the single nanotube level should thus

Boyer, Edmond

456

Transient x-ray absorption spectroscopy of hydrated halogen atom  

E-Print Network [OSTI]

Time-resolved x-ray absorption spectroscopy has been used to observe the transient species generated by one-photon detachment of an electron from aqueous bromide. The K-edge spectrum of the short-lived Br(0) atom exhibits a resonant 1s-4p transition...

Elles, Christopher G.; Shkrob, Ilya A.; Crowell, Robert A.; Arms, Dohn A.; Landahl, Eric C.

2008-02-11T23:59:59.000Z

457

Short communication Leaf optical properties and photosynthetic leaf absorptances  

E-Print Network [OSTI]

(PAR) values ranged from 45 Ć 3% for H. ovalis from a shallow (1 m) open coastal site in Western Australia of Australia. Leaf spectral transmittance [TL(l)], reflectance [RL(l)], and non-photosynthetic absorptance [AL species and sites. P. coriacea, a seagrass characteristic of high energy environments with the most

Durako, Michael J.

458

Laser photothermal spectroscopy of light-induced absorption  

SciTech Connect (OSTI)

Basic methods of laser photothermal spectroscopy, which are used to study photoinduced absorption in various media, are briefly considered. Comparative analysis of these methods is performed and the latest results obtained in this field are discussed. Different schemes and examples of their practical implementation are considered. (review)

Skvortsov, L A [Institute of Cryptography, Communications and Informatics, Moscow (Russian Federation)

2013-01-31T23:59:59.000Z

459

WEATHER MODIFICATION BY CARBON DUST ABSORPTION OF SOLAR ENERGY  

E-Print Network [OSTI]

WEATHER MODIFICATION BY CARBON DUST ABSORPTION OF SOLAR ENERGY by WM. M. GRAY, WM. M. FRANK, M OF SOLAR ENERGY by w. M. Gray, W. M. Frank, M. L. Corrin and C. A. Stokes Department of Atmospheric Science interception of solar energy. Growing population pressures and predicted future global food shortages dictate

Gray, William

460

Absorption cross-section 139 Accumulation mode, of aerosol 146  

E-Print Network [OSTI]

133, 151 residence times 153 size distributions 144 Air composition 2 molecular weight 4, 6 Albedo 122 dioxide Coagulation (aerosol) 146 Column model 32 Conditional unstability 56 Continuity equation 75261 INDEX A Absorption cross-section 139 Accumulation mode, of aerosol 146 Acetaldehyde (CH3CHO

Jacob, Daniel J.

Note: This page contains sample records for the topic "absorption chiller research" 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.


461

Optical absorption of pure water in the blue and ultraviolet  

E-Print Network [OSTI]

and Patel.53 ...............81 FIGURE V-11 The fundamental vibrational modes of the water molecule. ..................82 xiv Page FIGURE V-12 The ICAM VERSION-II results for the absorption of pure water. A large arrow with a boldface interger n indicates...

Lu, Zheng

2007-09-17T23:59:59.000Z

462

Saline absorption in calcium silicate brick observed by NMR scanning  

E-Print Network [OSTI]

Saline absorption in calcium silicate brick observed by NMR scanning L. Pel #3; , K. Kopinga #3 in calcium-silicate brick was investigated by nuclear magnetic resonance scanning. This method hasCl solution in a calcium silicate brick will be discussed. 2 Theory If gravity is neglected, the isothermal

Eindhoven, Technische Universiteit

463

Time resolved ultraviolet absorption spectroscopy of pulsed fluorocarbon plasmas  

E-Print Network [OSTI]

Time resolved ultraviolet absorption spectroscopy of pulsed fluorocarbon plasmas Brett A. Cruden.1063/1.1334936 I. INTRODUCTION The study of fluorocarbon plasmas is of great interest for their applications in silicon dioxide etching.1,2 Recently, at- tention has been paid to using fluorocarbon plasmas to pro- duce

Gleason, Karen K.

464

absorption radius measurements: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption radius measurements First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Measuring Neutron Star...

465

absorption profile spectrograph: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption profile spectrograph First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 The Properties of...

466

absorption hormonal release: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption hormonal release First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Original article Release of...

467

Studying galaxy formation through Lyman alpha in emission and absorption  

E-Print Network [OSTI]

directly probe neutral hydrogen in the high redshift Universe. Ly? can be observed in absorption in Damped Lyman Alpha systems (DLAs): high Hi column density regions that dominate the neutral gas content of the Universe between z ? 0 ? 5. Ly? in emission...

Barnes, Luke Andrew

2010-01-12T23:59:59.000Z

468

absorption effects network: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption effects network First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Character Rotation...

469

Methods for deacidizing gaseous mixtures by phase enhanced absorption  

DOE Patents [OSTI]

An improved process for deacidizing a gaseous mixture using phase enhanced gas-liquid absorption is described. The process utilizes a multiphasic absorbent that absorbs an acid gas at increased rate and leads to reduced overall energy costs for the deacidizing operation.

Hu, Liang

2012-11-27T23:59:59.000Z

470

Lifshitz tails for the Interband Light Absorption Coefficient  

E-Print Network [OSTI]

In this paper we consider the Interband Light Absorption Coefficient for various models. We show that at the lower and upper edges of the spectrum the Lifshitz tails behaviour of the density of states implies similar behaviour for the ILAC at appropriate energies. The Lifshitz tails property is also exhibited at some points corresponding to the internal band edges of the density of states.

W. Kirsch; M. Krishna

2009-03-31T23:59:59.000Z

471

absorption models linear: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption models linear First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 A Simulation of Ly-alpha...

472

absorption fine structures: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption fine structures First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Photon interference x-ray...

473

airborne differential absorption: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

airborne differential absorption First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Department of...

474

absorption spectroscopic study: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption spectroscopic study First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Electrical Conductivity,...

475

absorption spectroscopy xas: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption spectroscopy xas First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Time Resolved X-Ray...

476

absorption line indices: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption line indices First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Dust Sensitivity of...

477

absorption edge detector: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption edge detector First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 A combined corner and edge...

478

absorption lidar performance: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption lidar performance First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Development of a...

479

absorption line qsos: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption line qsos First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Polarization properties of broad...

480

absorption beamline x-11: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption beamline x-11 First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Brookhaven National Laboratory...

Note: This page contains sample records for the topic "absorption chiller research" 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.


481

absorption test pat: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption test pat First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Pat Montanio Assistant...

482

absorption filter method: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption filter method First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Filtering Methods Andras Fulop...

483

HI emission and absorption in nearby, gas-rich galaxies  

E-Print Network [OSTI]

We present the results of a targeted search for intervening HI absorption in six nearby, gas-rich galaxies using the Australia Telescope Compact Array (ATCA). The sightlines searched have impact parameters of 10-20 kpc. By targeting nearby galaxies we are also able to map their HI emission, allowing us to directly relate the absorption-line detection rate to the extended HI distribution. The continuum sightlines intersect the HI disk in four of the six galaxies, but no intervening absorption was detected. Of these four galaxies, we find that three of the non-detections are the result of the background source being too faint. In the fourth case we find that the ratio of the spin temperature to the covering factor ($T_{\\mathrm{S}}/f$) must be much higher than expected ($\\gtrsim$5700 K) in order to explain the non-detection. We discuss how the structure of the background continuum sources may have affected the detection rate of HI absorption in our sample, and the possible implications for future surveys. Future...

Reeves, S N; Allison, J R; Koribalski, B S; Curran, S J; Pracy, M B

2015-01-01T23:59:59.000Z

484

absorption measurements final: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption measurements final First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 WIMPy Leptogenesis With...

485

absorption lidar sensitivity: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption lidar sensitivity First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Development of a...

486

absorption lidar system: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption lidar system First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Development of a differential...

487

absorption spectrometric determination: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption spectrometric determination First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Standard test...

488

absorption bands observed: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption bands observed First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 AKARI observations of ice...

489

Slow-light enhancement of Beer-Lambert-Bouguer absorption  

E-Print Network [OSTI]

We theoretically show how slow light in an optofluidic environment facilitates enhanced light-matter interactions, by orders of magnitude. The proposed concept provides strong opportunities for improving existing miniaturized chemical absorbance cells for Beer-Lambert-Bouguer absorption measurements widely employed in analytical chemistry.

Niels Asger Mortensen; Sanshui Xiao

2007-03-06T23:59:59.000Z

490

absorption fine structure: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption fine structure First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Photon interference x-ray...

491

atmospheric absorption due: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

atmospheric absorption due First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 The thermal infrared spectra...

492

absorption liver uptake: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption liver uptake First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Diffuse Liver Uptake of...

493

absorption gpa air: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption gpa air First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Monitoring Air Moisture with Laser...

494

absorption spectrometric determinations: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption spectrometric determinations First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Standard test...

495

absorption skin: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption skin First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Healthy Skin Matters Normal Skin...

496

acoustic absorption peak: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

acoustic absorption peak First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 On the variations of acoustic...

497

absorption model analysis: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption model analysis First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Thermochemical Analysis of...

498

H I Self Absorption Toward Molecular Clouds: Theoretical Models  

E-Print Network [OSTI]

information and available data, visit the GRS web page at www.bu.eduwww.bu.edu/G/GRSRS References chemistry deep inside the molecular clouds. We study H I self- absorption toward molecular clouds is dominated by cold atomic hydrogen formed by cosmic ray chemistry deep in the interiors of clouds. If all

499

Modification of light transmission channels by inhomogeneous absorption in random media  

E-Print Network [OSTI]

Optical absorption is omnipresent and very often distributed non-uniformly in space. We present a numerical study on the effects of inhomogeneous absorption on transmission eigenchannels of light in highly scattering media. In the weak absorption regime, the spatial profile of a transmission channel remains very similar to that without absorption, and the effect of inhomogeneous absorption can be stronger or weaker than homogeneous absorption depending on the spatial overlap of the localized absorbing region with the field intensity maximum of the channel. In the strong absorption regime, the high transmission channels redirect the energy flows to circumvent the absorbing regions to minimize loss. The attenuation of high transmission channels by inhomogeneous absorption is lower than that by homogeneous absorption, regardless of the location of the absorbing region. The statistical distribution of transmission eigenvalues in the former becomes broader than that in the latter, due to a longer tail at high tran...

Liew, Seng Fatt

2015-01-01T23:59:59.000Z

500

Novel Controls for Economic Dispatch of Combined Cooling, Heating and Power (CCHP) Systems  

Broader source: Energy.gov [DOE]

The emergence of technologies that efficiently convert heat into cooling, such as absorption chillers, has opened up many new opportunities and markets for combined heat and power systems. These...