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1

A Detailed Microphysical Model Within a Two-Dimensional Dynamic Framework: Model Description and Preliminary Results  

Science Conference Proceedings (OSTI)

A two-dimensional anelastic cloud model which incorporates detailed treatments of the water and ice phase is presented. The liquid phase processes considered include condensation, quasi-stochastic coalescence, fallout and breakup, while the ice ...

William D. Hall

1980-11-01T23:59:59.000Z

2

Economic Impacts of Carbon Taxes: Detailed Results  

Science Conference Proceedings (OSTI)

Due to the possibility that rising concentrations of atmospheric greenhouse gases might cause undesirable climate change, policies to restrict emissions of carbon dioxide, a greenhouse gas, have been proposed. Such proposals frequently take the form of carbon taxes. This report presents the detailed results of an examination of the economic costs of carbon taxes, including where and how the U.S. economy would be impacted.

1995-01-04T23:59:59.000Z

3

Results of Detailed Hydrologic Characterization Tests - Fiscal Year 2003  

SciTech Connect

This report presents results obtained from detailed hydrologic characterization of the unconfined aquifer system conducted at the Hanford Site.

Spane, Frank A.; Newcomer, Darrell R.

2004-09-13T23:59:59.000Z

4

Analysis of the differences in energy simulation results between building information modeling (BIM)-based simulation method and the detailed simulation method  

Science Conference Proceedings (OSTI)

Building Information Modeling (BIM)-based simulation models have been used to automate lengthy building energy modeling processes and it enable fast acquisition of results. Recent improvements of simulation programs have continued to the increase in ...

Seongchan Kim; Jeong-Han Woo

2011-12-01T23:59:59.000Z

5

Results of Detailed Hydrologic Characterization Tests - Fiscal Year 1999  

Science Conference Proceedings (OSTI)

This report provides the results of detailed hydrologic characterization tests conducted within newly constructed Hanford Site wells during FY 1999. Detailed characterization tests performed during FY 1999 included: groundwater flow characterization, barometric response evaluation, slug tests, single-well tracer tests, constant-rate pumping tests, and in-well vertical flow tests. Hydraulic property estimates obtained from the detailed hydrologic tests include: transmissivity, hydraulic conductivity, specific yield, effective porosity, in-well lateral flow velocity, aquifer flow velocity, vertical distribution of hydraulic conductivity (within the well-screen section) and in-well vertical flow velocity. In addition, local groundwater flow characteristics (i.e., hydraulic gradient and flow direction) were determined for four sites where detailed well testing was performed.

Spane, Frank A.; Thorne, Paul D.; Newcomer, Darrell R.

2001-01-19T23:59:59.000Z

6

Detailed Physical Trough Model for NREL's Solar Advisor Model: Preprint  

SciTech Connect

Solar Advisor Model (SAM) is a free software package made available by the National Renewable Energy Laboratory (NREL), Sandia National Laboratory, and the US Department of Energy. SAM contains hourly system performance and economic models for concentrating solar power (CSP) systems, photovoltaic, solar hot-water, and generic fuel-use technologies. Versions of SAM prior to 2010 included only the parabolic trough model based on Excelergy. This model uses top-level empirical performance curves to characterize plant behavior, and thus is limited in predictive capability for new technologies or component configurations. To address this and other functionality challenges, a new trough model; derived from physical first principles was commissioned to supplement the Excelergy-based empirical model. This new 'physical model' approaches the task of characterizing the performance of the whole parabolic trough plant by replacing empirical curve-fit relationships with more detailed calculations where practical. The resulting model matches the annual performance of the SAM empirical model (which has been previously verified with plant data) while maintaining run-times compatible with parametric analysis, adding additional flexibility in modeled system configurations, and providing more detailed performance calculations in the solar field, power block, piping, and storage subsystems.

Wagner, M. J.; Blair, N.; Dobos, A.

2010-10-01T23:59:59.000Z

7

A detailed loads comparison of three building energy modeling programs:  

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

detailed loads comparison of three building energy modeling programs: detailed loads comparison of three building energy modeling programs: EnergyPlus, DeST and DOE-2.1E Title A detailed loads comparison of three building energy modeling programs: EnergyPlus, DeST and DOE-2.1E Publication Type Journal Year of Publication 2013 Authors Zhu, Dandan, Tianzhen Hong, Da Yan, and Chuang Wang Date Published 05/2013 Keywords building energy modeling program, building thermal loads, comparison, dest, DOE-2.1E, energyplus Abstract Building energy simulation is widely used to help design energy efficient building envelopes and HVAC systems, develop and demonstrate compliance of building energy codes, and implement building energy rating programs. However, large discrepancies exist between simulation results from different building energy modeling programs (BEMPs). This leads many users and stakeholders

8

Detailed Kinetic Modeling of Gasoline Surrogate Mixtures  

DOE Green Energy (OSTI)

Real fuels are complex mixtures of thousands of hydrocarbon compounds including linear and branched paraffins, naphthenes, olefins and aromatics. It is generally agreed that their behavior can be effectively reproduced by simpler fuel surrogates containing a limited number of components. In this work, a recently revised version of the kinetic model by the authors is used to analyze the combustion behavior of several components relevant to gasoline surrogate formulation. Particular attention is devoted to linear and branched saturated hydrocarbons (PRF mixtures), olefins (1-hexene) and aromatics (toluene). Model predictions for pure components, binary mixtures and multi-component gasoline surrogates are compared with recent experimental information collected in rapid compression machine, shock tube and jet stirred reactors covering a wide range of conditions pertinent to internal combustion engines. Simulation results are discussed focusing attention on the mixing effects of the fuel components.

Mehl, M; Curran, H J; Pitz, W J; Westbrook, C K

2009-03-09T23:59:59.000Z

9

Results of Detailed Hydrologic Characterization Tests - Fiscal Year 2000  

Science Conference Proceedings (OSTI)

This report provides the resluts of detailed hydrologic characterization tests conducted within eleven Hanford Site wells during fiscal year 2000. Detailed characterization tests performed included groundwater-flow characterization; barometric response evaluation; slug tests; single-well tracer tests; constant-rate pumping tests; and in-well, vertical flow tests. Hydraulic property estimates obtained from the detailed hydrologic tests include transmissivity; hydraulic conductivity; specific yield; effective porosity; in-well, lateral flow velocity; aquifer-flow velocity; vertical distribution of hydraulic conductivity (within the well-screen section); and in-well, verticla flow velocity. In addition, local groundwater-flow characteristics (i.e., hydraulic gradient and flow direction) were determined for four sites where detailed well testing was performed.

Spane, Frank A.; Thorne, Paul D.; Newcomer, Darrell R.

2001-05-15T23:59:59.000Z

10

Detailed Performance Model for Photovoltaic Systems: Preprint  

DOE Green Energy (OSTI)

This paper presents a modified current-voltage relationship for the single diode model. The single-diode model has been derived from the well-known equivalent circuit for a single photovoltaic cell. The modification presented in this paper accounts for both parallel and series connections in an array.

Tian, H.; Mancilla-David, F.; Ellis, K.; Muljadi, E.; Jenkins, P.

2012-07-01T23:59:59.000Z

11

San Joaquin-Tulare Conjunctive Use Model: Detailed model description  

DOE Green Energy (OSTI)

The San Joaquin - Tulare Conjunctive Use Model (SANTUCM) was originally developed for the San Joaquin Valley Drainage Program to evaluate possible scenarios for long-term management of drainage and drainage - related problems in the western San Joaquin Valley of California. A unique aspect of this model is its coupling of a surface water delivery and reservoir operations model with a regional groundwater model. The model also performs salinity balances along the tributaries and along the main stem of the San Joaquin River to allow assessment of compliance with State Water Resources Control Board water quality objectives for the San Joaquin River. This document is a detailed description of the various subroutines, variables and parameters used in the model.

Quinn, N.W.T.

1992-03-01T23:59:59.000Z

12

Towards cleaner combustion engines through groundbreaking detailed chemical kinetic models  

E-Print Network (OSTI)

Towards cleaner combustion engines through groundbreaking detailed chemical kinetic models of more predictive and more accurate detailed chemical kinetic models for the combustion of fuels that the combustion of liquid fuels will remain the main source of energy for transportation for the next 50 years.1

13

Detailed CFD modelling of open refrigerated display cabinets  

Science Conference Proceedings (OSTI)

A comprehensive and detailed computational fluid dynamics (CFDs) modelling of air flow and heat transfer in an open refrigerated display cabinet (ORDC) is performed in this study. The physical-mathematical model considers the flow through the internal ...

Pedro Dinis Gaspar; L. C. Carrilho Gonçalves; R. A. Pitarma

2012-01-01T23:59:59.000Z

14

Bio-butanol: Combustion properties and detailed chemical kinetic model  

Science Conference Proceedings (OSTI)

Autoignition delay time measurements were performed at equivalence ratios of 0.5, 1 and 2 for butan-1-ol at reflected shock pressures of 1, 2.6 and 8 atm at temperatures from 1100 to 1800 K. High-level ab initio calculations were used to determine enthalpies of formation and consequently bond dissociation energies for each bond in the alcohol. A detailed chemical kinetic model consisting of 1399 reactions involving 234 species was constructed and tested against the delay times and also against recent jet-stirred reactor speciation data with encouraging results. The importance of enol chemistry is highlighted. (author)

Black, G.; Curran, H.J.; Pichon, S.; Simmie, J.M.; Zhukov, V. [Combustion Chemistry Centre, National University of Ireland, Galway (Ireland)

2010-02-15T23:59:59.000Z

15

Radiation Fog: A Comparison of Model Simulation with Detailed Observations  

Science Conference Proceedings (OSTI)

A one-dimensional model designed to study the formation, growth, and dissipation of radiation fog is described. The model is compared with detailed observations made at the 200-m tower at Cabauw in the Netherlands. This study we use observations ...

Peter G. Duynkerke

1991-02-01T23:59:59.000Z

16

Towards a detailed soot model for internal combustion engines  

Science Conference Proceedings (OSTI)

In this work, we present a detailed model for the formation of soot in internal combustion engines describing not only bulk quantities such as soot mass, number density, volume fraction, and surface area but also the morphology and chemical composition of soot aggregates. The new model is based on the Stochastic Reactor Model (SRM) engine code, which uses detailed chemistry and takes into account convective heat transfer and turbulent mixing, and the soot formation is accounted for by SWEEP, a population balance solver based on a Monte Carlo method. In order to couple the gas-phase to the particulate phase, a detailed chemical kinetic mechanism describing the combustion of Primary Reference Fuels (PRFs) is extended to include small Polycyclic Aromatic Hydrocarbons (PAHs) such as pyrene, which function as soot precursor species for particle inception in the soot model. Apart from providing averaged quantities as functions of crank angle like soot mass, volume fraction, aggregate diameter, and the number of primary particles per aggregate for example, the integrated model also gives detailed information such as aggregate and primary particle size distribution functions. In addition, specifics about aggregate structure and composition, including C/H ratio and PAH ring count distributions, and images similar to those produced with Transmission Electron Microscopes (TEMs), can be obtained. The new model is applied to simulate an n-heptane fuelled Homogeneous Charge Compression Ignition (HCCI) engine which is operated at an equivalence ratio of 1.93. In-cylinder pressure and heat release predictions show satisfactory agreement with measurements. Furthermore, simulated aggregate size distributions as well as their time evolution are found to qualitatively agree with those obtained experimentally through snatch sampling. It is also observed both in the experiment as well as in the simulation that aggregates in the trapped residual gases play a vital role in the soot formation process. (author)

Mosbach, Sebastian; Celnik, Matthew S.; Raj, Abhijeet; Kraft, Markus [Department of Chemical Engineering and Biotechnology, University of Cambridge, Pembroke Street, Cambridge CB2 3RA (United Kingdom); Zhang, Hongzhi R. [Department of Chemical Engineering, University of Utah, 1495 East 100 South, Kennecott Research Building, Salt Lake City, UT 84112 (United States); Kubo, Shuichi [Frontier Research Center, Toyota Central R and D Labs., Inc., Nagakute, Aichi 480-1192 (Japan); Kim, Kyoung-Oh [Higashifuji Technical Center, Toyota Motor Corporation, Mishuku 1200, Susono, Shizuoka 480-1193 (Japan)

2009-06-15T23:59:59.000Z

17

HCCI in a CFR engine: experiments and detailed kinetic modeling  

DOE Green Energy (OSTI)

Single cylinder engine experiments and chemical kinetic modeling have been performed to study the effect of variations in fuel, equivalence ratio, and intake charge temperature on the start of combustion and the heat release rate. Neat propane and a fuel blend of 15% dimethyl-ether in methane have been studied. The results demonstrate the role of these parameters on the start of combustion, efficiency, imep, and emissions. Single zone kinetic modeling results show the trends consistent with the experimental results.

Flowers, D; Aceves, S; Smith, R; Torres, J; Girard, J; Dibble, R

1999-11-05T23:59:59.000Z

18

Detailed model for practical pulverized coal furnaces and gasifiers  

Science Conference Proceedings (OSTI)

This study has been supported by a consortium of nine industrial and governmental sponsors. Work was initiated on May 1, 1985 and completed August 31, 1989. The central objective of this work was to develop, evaluate and apply a practical combustion model for utility boilers, industrial furnaces and gasifiers. Key accomplishments have included: Development of an advanced first-generation, computer model for combustion in three dimensional furnaces; development of a new first generation fouling and slagging submodel; detailed evaluation of an existing NO{sub x} submodel; development and evaluation of an improved radiation submodel; preparation and distribution of a three-volume final report: (a) Volume 1: General Technical Report; (b) Volume 2: PCGC-3 User's Manual; (c) Volume 3: Data Book for Evaluation of Three-Dimensional Combustion Models; and organization of a user's workshop on the three-dimensional code. The furnace computer model developed under this study requires further development before it can be applied generally to all applications; however, it can be used now by specialists for many specific applications, including non-combusting systems and combusting geseous systems. A new combustion center was organized and work was initiated to continue the important research effort initiated by this study. 212 refs., 72 figs., 38 tabs.

Smith, P.J.; Smoot, L.D.

1989-08-01T23:59:59.000Z

19

Development of Detailed Kinetic Models for Fischer-Tropsch Fuels  

DOE Green Energy (OSTI)

Fischer-Tropsch (FT) fuels can be synthesized from a syngas stream generated by the gasification of biomass. As such they have the potential to be a renewable hydrocarbon fuel with many desirable properties. However, both the chemical and physical properties are somewhat different from the petroleum-based hydrocarbons that they might replace, and it is important to account for such differences when considering using them as replacements for conventional fuels in devices such as diesel engines and gas turbines. FT fuels generally contain iso-alkanes with one or two substituted methyl groups to meet the pour-point specifications. Although models have been developed for smaller branched alkanes such as isooctane, additional efforts are required to properly capture the kinetics of the larger branched alkanes. Recently, Westbrook et al. developed a chemical kinetic model that can be used to represent the entire series of n-alkanes from C{sub 1} to C{sub 16} (Figure 1). In the current work, the model is extended to treat 2,2,4,4,6,8,8-heptamethylnonane (HMN), a large iso-alkane. The same reaction rate rules used in the iso-octane mechanism were incorporated in the HMN mechanism. Both high and low temperature chemistry was included so that the chemical kinetic model would be applicable to advanced internal combustion engines using low temperature combustion strategies. The chemical kinetic model consists of 1114 species and 4468 reactions. Concurrently with this effort, work is underway to improve the details of specific reaction classes in the mechanism, guided by high-level electronic structure calculations. Attention is focused upon development of accurate rate rules for abstraction of the tertiary hydrogens present in branched alkanes and properly accounting for the pressure dependence of the ?-scission, isomerization, and R + O{sub 2} reactions.

Westbrook, C K; Pitz, W J; Carstensen, H; Dean, A M

2008-10-28T23:59:59.000Z

20

Reduced Form of Detailed Modeling of Wind Transmission and Intermittency for Use in Other Models: Preprint  

Science Conference Proceedings (OSTI)

This paper, to accompany the corresponding poster, presents reduced-form outputs from the Wind Deployment Systems Model (WinDS) that can be implemented in other models with less- detailed wind power modeling capabilities. Other models will be able to use the reduced-form results to improve the accuracy of the wind power portion of their models. WinDS is a multiregional, multitime-period, Geographic Information System (GIS) and linear programming model of capacity expansion in the electric sector of the United States. WinDS is designed to address the market issues related to the penetration of wind power into the electric sector. These principal market issues include the geographic dependency of the resource, access to and cost of transmission, and the intermittency of wind power.

Blair, N.; Short, W.; Heimiller, D.

2005-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "model results detailed" 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

Detailed model for practical pulverized coal furnaces and gasifiers  

SciTech Connect

The need to improve efficiency and reduce pollutant emissions commercial furnaces has prompted energy companies to search for optimized operating conditions and improved designs in their fossil-fuel burning facilities. Historically, companies have relied on the use of empirical correlations and pilot-plant data to make decisions about operating conditions and design changes. The high cost of collecting data makes obtaining large amounts of data infeasible. The main objective of the data book is to provide a single source of detailed three-dimensional combustion and combustion-related data suitable for comprehensive combustion model evaluation. Five tasks were identified as requirements to achieve the main objective. First, identify the types of data needed to evaluate comprehensive combustion models, and establish criteria for selecting the data. Second, identify and document available three-dimensional combustion data related to pulverized coal combustion. Third, collect and evaluate three-dimensional data cases, and select suitable cases based on selection criteria. Fourth, organize the data sets into an easy-to-use format. Fifth, evaluate and interpret the nature and quality of the data base. 39 refs., 15 figs., 14 tabs.

Philips, S.D.; Smoot, L.D.

1989-08-01T23:59:59.000Z

22

A Detailed Power Model for Field Programmable Gate Arrays  

E-Print Network (OSTI)

1998]. Therefore, the Transition Density Model is employed in this power model. The Transition Density, and are an important component of the total overall power. However, the original Transition Density model does and discharging of load and parasitic capacitances. Therefore, dynamic power is closely related to the transition

Wilton, Steve

23

Detailed chemical kinetic modeling of diesel combustion with oxygenated fuels  

DOE Green Energy (OSTI)

The influence of oxygenated hydrocarbons as additives to diesel fuels on ignition, NOx emissions and soot production has been examined using a detailed chemical kinetic reaction mechanism. N-heptane was used as a representative diesel fuel, and methanol, ethanol, dimethyl ether and dimethoxymethane were used as oxygenated fuel additives. It was found that addition of oxygenated hydrocarbons reduced NOx levels and reduced the production of soot precursors. When the overall oxygen content in the fuel reached approximately 25% by mass, production of soot precursors fell effectively to zero, in agreement with experimental studies. The kinetic factors responsible for these observations are discussed.

Pitz, W J; Curran, H J; Fisher, E; Glaude, P A; Marinov, N M; Westbrook, C K

1999-10-28T23:59:59.000Z

24

Recovering UML class models from C++: A detailed explanation  

Science Conference Proceedings (OSTI)

An approach to recovering design-level UML class models from C++ source code to support program comprehension is presented. A set of mappings are given that focus on accurately identifying such elements as relationship types, multiplicities, and aggregation ... Keywords: Design recovery, Program comprehension, Reverse engineering, Software engineering, UML class models

Andrew Sutton; Jonathan I. Maletic

2007-03-01T23:59:59.000Z

25

Detailed and global chemical kinetics model for hydrogen  

DOE Green Energy (OSTI)

Detailed and global chemical kinetic computations for hydrogen-air mixtures have been performed to describe flame propagation, flame structure and ignition phenomena. Simulations of laminar flame speeds, flame compositions and shock tube ignition delay times have been successfully performed. Sensitivity analysis was applied to determine the governing rate-controlling reactions for the experimental data sets examined. In the flame propagation and structure studies, the reactions, OH + H{sub 2} = H{sub 2}0 + H, 0 + H{sub 2} = OH + H and 0 + OH = 0{sub 2} + H were the most important in flames. The shock tube ignition delay time study indicated the H + 0{sub 2} + M = H0{sub 2} + M (M = N{sub 2}, H{sub 2}) and 0 + OH = 0{sub 2} + H reactions controlled ignition. A global rate expression for a one-step overall reaction was developed and validated against experimental hydrogen-air laminar flame speed data. The global reaction expression was determined to be 1.8 {times} 10{sup 13} exp({minus}17614K/T)[H{sub 2}]{sup 1.0}[O{sub 2}]{sup 0.5} for the single step reaction H{sub 2} + 1/2O{sub 2} = H{sub 2}O.

Marinov, N.M.; Westbrook, C.K.; Pitz, W.J.

1995-03-01T23:59:59.000Z

26

Modeling HCCI using CFD and Detailed Chemistry with Experimental Validation and a Focus on CO Emissions  

DOE Green Energy (OSTI)

Multi-zone CFD simulations with detailed kinetics were used to model engine experiments performed on a diesel engine that was converted for single cylinder, HCCI operation, here using iso-octane as the fuel. The modeling goals were to validate the method (multi-zone combustion modeling) and the reaction mechanism (LLNL 857 species iso-octane), both of which performed very well. The purpose of this paper is to document the validation findings and to set the ground work for further analysis of the results by first looking at CO emissions characteristics with varying equivalence ratio.

Hessel, R; Foster, D; Aceves, S; Flowers, D; Pitz, B; Dec, J; Sjoberg, M; Babajimopoulos, A

2007-04-23T23:59:59.000Z

27

Appendix D-1 D-1.1 Buildings Appendix D-1: Detailed results  

E-Print Network (OSTI)

was published, including detailed breakdowns of the residential and commercial miscellaneous end-uses, explicit and cooling, residential water heating, commercial heating and cooling, commercial ventilation, commercial lighting, and commercial water heating. #12;Appendix D-1 D-1.3 Buildings economic potential with respect

28

HIERARCHICAL METHODOLOGY FOR MODELING HYDROGEN STORAGE SYSTEMS PART II: DETAILED MODELS  

DOE Green Energy (OSTI)

There is significant interest in hydrogen storage systems that employ a media which either adsorbs, absorbs or reacts with hydrogen in a nearly reversible manner. In any media based storage system the rate of hydrogen uptake and the system capacity is governed by a number of complex, coupled physical processes. To design and evaluate such storage systems, a comprehensive methodology was developed, consisting of a hierarchical sequence of models that range from scoping calculations to numerical models that couple reaction kinetics with heat and mass transfer for both the hydrogen charging and discharging phases. The scoping models were presented in Part I [1] of this two part series of papers. This paper describes a detailed numerical model that integrates the phenomena occurring when hydrogen is charged and discharged. A specific application of the methodology is made to a system using NaAlH{sub 4} as the storage media.

Hardy, B; Donald L. Anton, D

2008-12-22T23:59:59.000Z

29

A detailed model for a high-mix low-volume asic fab  

Science Conference Proceedings (OSTI)

Looking for new improvement options such as new dispatching rules of an existing semiconductor fabrication facility, a detailed model is indispensable to check the data quality as well as detecting main influences of the facility and finally testing ...

Mike Gissrau; Oliver Rose

2011-12-01T23:59:59.000Z

30

An 128Innovative Vehicular Traffic Combined Simulation Tool: From a Detailed Analysis to Comprehensive Results  

Science Conference Proceedings (OSTI)

This paper presents a technologically advanced analysis method to study the urban traffic problem. The integrated approach described here may also provide interesting results for studying particularly extensive and complex situations, while guaranteeing ...

Agostino G. Bruzzone; D. Rivarolo

1996-04-01T23:59:59.000Z

31

VEMAP 2: Selected Model Results  

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

Model Results Model Results The ORNL DAAC announces the release of two data sets from Phase 2 of the Vegetation/Ecosystem Modeling and Analysis Project (VEMAP). The two data sets contain monthly and annual results, respectively, from experiments conducted to compare the ecological responses of the suite of VEMAP models to projected transient scenarios of climate and atmospheric carbon dioxide for the period 1994 to 2100. The models investigated included five biogeochemical cycling models, which simulate plant production and nutrient cycles but rely on a static land-cover type, and two dynamic global vegetation models (DGVMs), which combine biogeochemical cycling processes with dynamic biogeographical processes including succession and fire simulation. VEMAP was an international project studying the response of biogeochemical

32

Development of a methodology to reduce the order of a detailed lumped parameter transformer model  

SciTech Connect

The transformer designer employs detailed electrical models to develop a reliable and cost effective transformer insulation structure. The power engineer must model not only the transformer, but the system, therefore the power engineer requires a smaller model of the transformer that accurately represents its behavior in order to investigate the effects of power system transients. Reduced models are generally obtained either from detailed design models or from measurements on fully constructed transformers. Reduced models constructed from design data generally act as low pass filters and are severely limited in accuracy at high frequencies. The latter technique has the major disadvantage that the model cannot be constructed until after the transformer has been built. Presently, both methods are subject to considerable error. The primary objective of this thesis is to develop a technique that reduces the order of a lumped parameter transformer model used in insulation design and that provides a reduced model of any specified size for transient studies of systems which contain the transformer. The reduction technique developed can be applied to any lumped parameter network which uses electric parameter analogs (i.e., FEM networks). The method of this thesis uses Kron`s reduction approach in time domain to obtain a reduced model. This reduced model is compatible with industry methods for transient studies (EMTP) and retains the accuracy and stability of the detailed model. Additionally, this reduced model can be used to predict the interaction between the transformer and the power system, via EMTP, giving a valuable tool to both power and design engineers. Application of the technique for the detailed model of a 765/345/34.5 kV, YYD, core form, 500 MVA single phase autotransformer is verified by frequency and time domain tests for the linear model. The nonlinear transformer model reduction technique is outlined and a proof of concept is provided by two examples.

Gutierrez, M.R.

1993-12-31T23:59:59.000Z

33

GyPSuM: A Detailed Tomographic Model of Mantle Density and Seismic Wave Speeds  

SciTech Connect

GyPSuM is a tomographic model fo mantle seismic shear wave (S) speeds, compressional wave (P) speeds and detailed density anomalies that drive mantle flow. the model is developed through simultaneous inversion of seismic body wave travel times (P and S) and geodynamic observations while considering realistic mineral physics parameters linking the relative behavior of mantle properties (wave speeds and density). Geodynamic observations include the (up to degree 16) global free-air gravity field, divergence of the tectonic plates, dynamic topography of the free surface, and the flow-induced excess ellipticity of the core-mantle boundary. GyPSuM is built with the philosophy that heterogeneity that most closely resembles thermal variations is the simplest possible solution. Models of the density field from Earth's free oscillations have provided great insight into the density configuration of the mantle; but are limited to very long-wavelength solutions. Alternatively, simply scaling higher resolution seismic images to density anomalies generates density fields that do not satisfy geodynamic observations. The current study provides detailed density structures in the mantle while directly satisfying geodynamic observations through a joint seismic-geodynamic inversion process. Notable density field observations include high-density piles at the base of the superplume structures, supporting the fundamental results of past normal mode studies. However, these features are more localized and lower amplitude than past studies would suggest. When we consider all seismic anomalies in GyPSuM, we find that P and S-wave speeds are strongly correlated throughout the mantle. However, correlations between the high-velocity S zones in the deep mantle ({approx} 2000 km depth) and corresponding P-wave anomalies are very low suggesting a systematic divergence from simplified thermal effects in ancient subducted slab anomalies. Nevertheless, they argue that temperature variations are the primary cause of P-wave, S-wave, and density anomalies in the mantle.

Simmons, N A; Forte, A M; Boschi, L; Grand, S P

2010-03-30T23:59:59.000Z

34

Feasibility study for biomass power plants in Thailand. Volume 2. appendix: Detailed financial analysis results. Export trade information  

SciTech Connect

This study, conducted by Black & Veatch, was funded by the U.S. Trade and Development Agency. The report presents a technical and commercial analysis for the development of three nearly identical electricity generating facilities (biomass steam power plants) in the towns of Chachgoengsao, Suphan Buri, and Pichit in Thailand. Volume 2 of the study contains the following appendix: Detailed Financial Analysis Results.

1997-06-01T23:59:59.000Z

35

Development of Detailed Kinetic Models for the Thermal Conversion of Biomass via First  

E-Print Network (OSTI)

Chapter 10 Development of Detailed Kinetic Models for the Thermal Conversion of Biomass via First. In this contribution we discuss four selected example systems related to the thermal conversion of biomass reaction steps, for the biomass gasification process would be of tremendous value to engineers who try

Dean, Anthony M.

36

Rain Production in Convective Clouds As Simulated in an Axisymmetric Model with Detailed Microphysics. Part I: Description of the Model  

Science Conference Proceedings (OSTI)

A hydrodynamic nonhydrostatic anelastic numerical model of an axisymmetric convective cloud is described in which the microphysical processes are treated in detail for different species of hydrometeors: drops. ice crystals, graupel, and snow ...

Tamir Reisin; Zev Levin; Shalva Tzivion

1996-02-01T23:59:59.000Z

37

Continuum Power Spectrum Components in X-Ray Sources: Detailed Modelling and Search for Coherent Periodicities  

E-Print Network (OSTI)

This paper summarises two recently developed techniques in power spectral analysis and their application to a sample of X-ray light curves of accreting collapsed objects in active galactic nuclei and X-ray binaries. The first technique is designed to carry out detailed model fitting of continuum power spectrum components arising from noise variability by using maximum likelihood methods. The technique is applied to the light curves of a number of highly variable AGNs observed with EXOSAT. Substantially steeper logarithmic power spectrum slopes are obtained than previously estimated with standard methods. The second technique was devised in order to reveal coherent periodicities in the presence of ``coloured" (i.e. non--white) noise variability components from the source. To this aim the power spectra are searched for significant narrow peaks superposed on the ``coloured" continuum components. We present the results of a search for an orbital modulation in the light curves of a sample of 25 low mass X--ray binaries (LMXRBs), for which the orbital period is either unknown or detected only at optical wavelengths. This led to the discovery of a significant X--ray orbital modulation at the few percent level in the burster MXB1636-539.

L. Stella; E. Arlandi; G. Tagliaferri; G. L. Israel

1994-11-13T23:59:59.000Z

38

Detailed Balance Condition and Effective Free Energy in the Primitive Chain Network Model  

E-Print Network (OSTI)

We consider statistical mechanical properties of the primitive chain network (PCN) model for entangled polymers from its dynamic equations. We show that the dynamic equation for the segment number of the PCN model does not reduce to the standard Langevin equation which satisfies the detailed balance condition. We propose heuristic modifications for the PCN dynamic equation for the segment number, to make it reduce to the standard Langevin equation. We analyse some equilibrium statistical properties of the modified PCN model, by using the effective free energy obtained from the modified PCN dynamic equations. The PCN effective free energy can be interpreted as the sum of the ideal Gaussian chain free energy and the repulsive interaction energy between slip-links. By using the single chain approximation, we calculate several distribution functions of the PCN model. The obtained distribution functions are qualitatively different from ones for the simple slip-link model without any direct interactions between slip-links.

Takashi Uneyama; Yuichi Masubuchi

2011-10-18T23:59:59.000Z

39

Detailed report on tested models companion report 2 to simulation of geothermal subsidence (LBL 10571)  

DOE Green Energy (OSTI)

An assessment was performed of existing mathematical models for subsidence simulation and prediction. Detailed analyses are presented of the theory, power, usability, and performance of the seven models used in conjunction with an ongoing research program aimed at improved understanding and control of ground movements caused by geothermal power production. The models used were: hand-calculation techniques; the nucleus-of-strain method; the one-dimensional Terzaghi consolidation method; the two-dimensional boundary-integral-equation method; two-dimensional finite-element coupled fluid flow and deformation; three-dimensional integrated finite difference, coupled fluid flow, heat flow, and porosity change; and the three-dimensional displacement discontinuity method. (MHR)

Miller, I.; Dershowitz, W.; Jones, K.; Myer, L.; Roman, K.; Schauer, M.

1980-03-01T23:59:59.000Z

40

Deciphering the details of RNA aminoglycoside interactions: from atomistic models to biotechnological applications  

SciTech Connect

A detailed study was done of the neomycin-B RNA aptamer for determining its selectivity and binding ability to both neomycin– and kanamycin-class aminoglycosides. A novel method to increase drug concentrations in cells for more efficiently killing is described. To test the method, a bacterial model system was adopted and several small RNA molecules interacting with aminoglycosides were cloned downstream of T7 RNA polymerase promoter in an expression vector. Then, the growth analysis of E. coli expressing aptamers was observed for 12-hour period. Our analysis indicated that aptamers helped to increase the intracellular concentration of aminoglycosides thereby increasing their efficacy.

Ilgu, Muslum

2012-07-23T23:59:59.000Z

Note: This page contains sample records for the topic "model results detailed" 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

On the Dynamics of Hawaiian Cloud Bands: Comparison of Model Results with Observations and Island Climatology  

Science Conference Proceedings (OSTI)

This paper presents a detailed comparison study of three-dimensional model results with an aircraft wind field mapping for the island of Hawaii. Model runs were initialized using an aircraft sounding from 1 August 1985, and detailed predictions ...

Roy M. Rasmussen; Piotr Smolarkiewicz; John Warner

1989-06-01T23:59:59.000Z

42

A Detailed Spatiokinematic Model of the Conical Outflow of the Multipolar Planetary Nebula, NGC 7026  

E-Print Network (OSTI)

We present an extensive, long-slit, high-resolution coverage of the complex planetary nebula (PN), NGC 7026. We acquired ten spectra using the Manchester Echelle Spectrometer at San Pedro Martir Observatory in Baja California, Mexico, and each shows exquisite detail, revealing the intricate structure of this object. Incorporating these spectra into the 3-dimensional visualization and kinematic program, SHAPE, and using HST images of NGC 7026, we have produced a detailed structural and kinematic model of this PN. NGC 7026 exhibits remarkable symmetry consisting of three lobe-pairs and four sets of knots, all symmetrical about the nucleus and displaying a conical outflow. Comparing the 3-D structure of this nebula to recent, XMM-Newton X-ray observations, we investigate the extended X-ray emission in relation to the nebular structure. We find that the X-ray emission, while confined to the closed, northern lobes of this PN, shows an abrupt termination in the middle of the SE lobe, which our long slit data shows ...

Clark, D M; Steffen, W; Richer, M G

2012-01-01T23:59:59.000Z

43

Posters A One-Dimensional Radiative Convective Model with Detailed Cloud Microphysics  

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

5 5 Posters A One-Dimensional Radiative Convective Model with Detailed Cloud Microphysics J. Simmons, O. Lie-Svendsen, and K. Stamnes Geophysical Institute University of Alaska Fairbanks, Alaska The Arctic is a key element in determining the radiation budget of the earth. Within the polar regions, the net radiation (incoming solar radiation minus outgoing infrared radiation) is negative. To understand the role this energy deficit plays in the overall radiation budget, one must examine the prevalent atmospheric features of the Arctic. One such feature is a persistent layer of low-altitude, stratiform clouds found over the central Arctic predominantly from April to September (Tsay et al. 1984). These Arctic stratus clouds (ASC) modulate the earth's radiation budget

44

Hydropower Resource Assessment Modeling Results  

DOE Green Energy (OSTI)

The Hydropower Evaluation Software uses the Federal Energy Regulatory Commission?s Hydroelectric Power Resource Assessment database to identify sites with undeveloped hydropower capacity and the estimated megawatts of undeveloped capacity at each site. The software integrates this information with environmental values from the National Park Service?s National Rivers Inventory database. Other constraints to development that are modeled include Federal and state legislative protection for river segments that have been identified as being wild and scenic river segments. River segments containing threatened and/or endangered wildlife and fish are also modeled for their influence on hydropower development. The amount that each attribute affects the likelihood of development is dependent on the prior development of a site.

A. M. Conner; J. E. Francfort

1999-07-06T23:59:59.000Z

45

A Radiation Fog Model with a Detailed Treatment of the Interaction between Radiative Transfer and Fog Microphysics  

Science Conference Proceedings (OSTI)

A one-dimensional radiation fog model is presented which includes a detailed description of the interaction between atmospheric radiative transfer and the microphysical structure of the fog. Aerosol particles and activated cloud droplets are ...

A. Bott; U. Sievers; W. Zdunkowski

1990-09-01T23:59:59.000Z

46

Detailed modeling of size distribution functions and hydrogen content in combustion-formed particles  

SciTech Connect

A kinetic modeling approach is proposed to delve into the nature and chemistry of combustion-produced particles. A sectional method is used for the first time on this purpose. It is based on modeling of gas-to-particle transitions by sections containing 125 lumped species with C numbers ranging from 24 to 4 x 10{sup 8} and H/C ratio ranging from 0 to 1. This allows not only the mass evolution of particles, but also their hydrogen content to be followed. The model is tested in an atmospheric pressure premixed flat flame of ethylene/oxygen with C/O = 0.8 and cold gas flow velocity of 4 cm/s. Comparison of modeled results with experimental data is satisfying in terms of species concentrations and H/C ratio of the particles. Analysis of model results in comparison with the experimental data has shown that it is possible to distinguish different precursors of particles moving from the exit of the burner into the post-oxidation region of the flame. At particle inception, i.e. just downstream from the flame front, gas-phase PAHs are responsible for particle nucleation and oligomers of aromatic hydrocarbons and small pericondensed hydrocarbons are predominantly present. Then the dehydrogenation process takes place and soot formation starts; in this zone large pericondensed and stacked structures are produced. Further up soot maturation generally linked with dehydrogenation is present, but still a few particles with higher H/C and with low coagulation efficiency are produced and remain present along the flame. The model, in accordance with experimental structural soot analysis, shows that in soot particles condensed structures typical of clusters of large pericondensed hydrocarbons are present whereas high-molecular mass condensed species mainly comprise oligomers of small aromatic compounds of clusters of small pericondensed hydrocarbons. (author)

Sirignano, Mariano; D'Anna, Andrea [Dipartimento di Ingegneria Chimica, Universita di Napoli ''Federico II'', Napoli (Italy); Kent, John [School of Aerospace, Mechanical and Mechatronic Engineering, University of Sydney, Sydney (Australia)

2010-06-15T23:59:59.000Z

47

A Plug-in Hybrid Consumer Choice Model with Detailed Market Segmentation  

DOE Green Energy (OSTI)

This paper describes a consumer choice model for projecting U.S. demand for plug-in hybrid electric vehicles (PHEV) in competition among 13 light-duty vehicle technologies over the period 2005-2050. New car buyers are disaggregated by region, residential area, attitude toward technology risk, vehicle usage intensity, home parking and work recharging. The nested multinomial logit (NMNL) model of vehicle choice incorporates daily vehicle usage distributions, refueling and recharging availability, technology learning by doing, and diversity of choice among makes and models. Illustrative results are presented for a Base Case, calibrated to the Annual Energy Outlook (AEO) 2009 Reference Updated Case, and an optimistic technology scenario reflecting achievement of U.S. Department of Energy s (DOE s) FreedomCAR goals. PHEV market success is highly dependent on the degree of technological progress assumed. PHEV sales reach one million in 2037 in the Base Case but in 2020 in the FreedomCARGoals Case. In the FreedomCARGoals Case, PHEV cumulative sales reach 1.5 million by 2015. Together with efficiency improvements in other technologies, petroleum use in 2050 is reduced by about 45% from the 2005 level. After technological progress, PHEV s market success appears to be most sensitive to recharging availability, consumers attitudes toward novel echnologies, and vehicle usage intensity. Successful market penetration of PHEVs helps bring down battery costs for electric vehicles (EVs), resulting in a significant EV market share after 2040.

Lin, Zhenhong [ORNL; Greene, David L [ORNL

2010-01-01T23:59:59.000Z

48

Integrating chemistry into 3D climate models: Detailed kinetics in the troposphere and stratosphere of a global climate model  

SciTech Connect

This is the final report of a three-year, Laboratory Directed Research and Development (LDRD) project at Los Alamos National Laboratory (LANL). The motivation for the project is to create the first complete, three-dimensional climate model that enfolds atmospheric photochemistry. The LANL chemical global climate model (GCM) not only distributes the trace greenhouse gases and modifies their concentrations within the detailed photochemical web, but also permits them to influence the radiation field and so force their own transport. Both atmospheric chemistry and fluid dynamics are nonlinear and zonally asymmetric phenomena. They can only be adequately modeled in three dimensions on the global grid. The kinetics-augmented GCM is the only program within the atmospheric community capable of investigating interaction involving chemistry and transport. The authors have conducted case studies of timely three-dimensional chemistry issues. Examples include ozone production from biomass burning plumes, kinetic feedbacks in zonally asymmetric transport phenomena with month- to year-long time scales, and volcano sulfate aerosols with respect to their potential effects on tropospheric ozone depletion.

Kao, C.Y.J.; Elliott, S. [Los Alamos National Lab., NM (United States). Earth and Environmental Sciences Div.; Turco, R.P.; Zhao, X. [Univ. of California, Los Angeles, CA (United States)

1997-11-01T23:59:59.000Z

49

Recent Advances in Detailed Chemical Kinetic Models for Large Hydrocarbon and Biodiesel Transportation Fuels  

DOE Green Energy (OSTI)

n-Hexadecane and 2,2,4,4,6,8,8-heptamethylnonane represent the primary reference fuels for diesel that are used to determine cetane number, a measure of the ignition property of diesel fuel. With the development of chemical kinetics models for these two primary reference fuels for diesel, a new capability is now available to model diesel fuel ignition. Also, we have developed chemical kinetic models for a whole series of large n-alkanes and a large iso-alkane to represent these chemical classes in fuel surrogates for conventional and future fuels. Methyl decanoate and methyl stearate are large methyl esters that are closely related to biodiesel fuels, and kinetic models for these molecules have also been developed. These chemical kinetic models are used to predict the effect of the fuel molecule size and structure on ignition characteristics under conditions found in internal combustion engines.

Westbrook, C K; Pitz, W J; Curran, H J; Herbinet, O; Mehl, M

2009-03-30T23:59:59.000Z

50

APPENDIX D-2 DETAILED RESULTS  

E-Print Network (OSTI)

.3 Industry #12;Industrial Sector Forecast Summary Electricity as Primary energy Page 4 CEF-NEMS Business.850 1.787 Appendix D-2.xls D-2.4 Industry #12;Industrial Sector Forecast Summary Electricity as Primary.241 29.674 30.010 Appendix D-2.xls D-2.10 Industry #12;Industrial Sector Forecast Summary Electricity

51

Detailed Spatial Modeling of Carbon Capture and Storage Infrastructure Deployment in the Southwestern United States  

E-Print Network (OSTI)

, Pipeline and Hazardous Materials Administration. 13. US EPA, eGRID Database. 2006, United States are given by EPA Egrid data USEPA (2006) and costs are calculated using the IECM model (Berkenpas et al

California at Davis, University of

52

The Sensitivity of Precipitation to Circulation Details. Part II: Mesoscale Modeling  

Science Conference Proceedings (OSTI)

A base case and the best time-coherent, regional analog to that case, identified in Part I, were analyzed to determine the precise mechanisms responsible for the differences in precipitation amounts. This analysis was conducted using two modeling ...

Paul J. Roebber; Gerhard W. Reuter

2002-01-01T23:59:59.000Z

53

Technology detail in a multi-sector CGE model : transport under climate policy  

E-Print Network (OSTI)

A set of three analytical models is used to study the imbedding of specific transport technologies within a multi-sector, multi-region evaluation of constraints on greenhouse emissions. Key parameters of a computable general ...

Schafer, Andreas.

54

OIKOS 102: 654662, 2003 What kind of spatial and temporal details are required in models  

E-Print Network (OSTI)

and Lyme disease risk. Science 279:1023­ 1026. Kendall, B. E. 1998. Estimating the magnitude of environmen. 2000. Models of mast seeding and its ecological effects on gypsy moth populations and Lyme- disease

Berkowitz, Alan R.

55

Annual Energy Outlook 2000 - Model Results & Report  

Gasoline and Diesel Fuel Update (EIA)

Forecasts Summary of the AEO2001 Cases Scenarios - Appendix Table G1 bullet1.gif (843 bytes) Model Results (Formats - PDF, ZIP) - Appendix Tables - Reference Case - 1998 to 2020...

56

New Results on Standard Solar Models  

E-Print Network (OSTI)

We describe the current status of solar modelling and focus on the problems originated with the introduction of solar abundance determinations with low CNO abundance values. We use models computed with solar abundance compilations obtained during the last decade, including the newest published abundances by Asplund and collaborators. Results presented here make focus both on helioseismic properties and the models as well as in the neutrino fluxes predictions. We also discuss changes in radiative opacities to restore agreement between helioseismology, solar models, and solar abundances and show the effect of such modifications on solar neutrino fluxes.

Serenelli, Aldo M

2009-01-01T23:59:59.000Z

57

Detailed Chemical Kinetic Modeling of Surrogate Fuels for Gasoline and Application to an HCCI Engine  

SciTech Connect

Gasoline consists of many different classes of hydrocarbons, such as paraffins, olefins, aromatics, and cycloalkanes. In this study, a surrogate gasoline reaction mechanism is developed, and it has one representative fuel constituent from each of these classes. These selected constituents are iso-octane, n-heptane, 1-pentene, toluene, and methyl-cyclohexane. The mechanism was developed in a step-wise fashion, adding submechanisms to treat each fuel component. Reactions important for low temperature oxidation (<1000K) and cross-reactions among different fuels are incorporated into the mechanism. The mechanism consists of 1214 species and 5401 reactions. A single-zone engine model is used to evaluate how well the mechanism captures autoignition behavior for conditions corresponding to homogeneous charge compression ignition (HCCI) engine operation. Experimental data are available for both how the combustion phasing changes with fueling at a constant intake temperature, and also how the intake temperature has to be changed with pressure in order to maintain combustion phasing for a fixed equivalence ratio. Three different surrogate fuel mixtures are used for the modeling. Predictions are in reasonably good agreement with the engine data. In addition, the heat release rate is calculated and compared to the data from experiments. The model predicts less low-temperature heat release than that measured. It is found that the low temperature heat-release rate depends strongly on engine speed, reactions of RO{sub 2}+HO{sub 2}, fuel composition, and pressure boost.

Naik, C V; Pitz, W J; Sj?berg, M; Dec, J E; Orme, J; Curran, H J; Simmie, J M; Westbrook, C K

2005-01-07T23:59:59.000Z

58

A model for determining when an analysis contains sufficient detail to provide adequate NEPA coverage for a proposed action  

SciTech Connect

Neither the National Environmental Policy Act (NEPA) nor its subsequent regulations provide substantive guidance for determining the Level of detail, discussion, and analysis that is sufficient to adequately cover a proposed action. Yet, decisionmakers are routinely confronted with the problem of making such determinations. Experience has shown that no two decisionmakers are Likely to completely agree on the amount of discussion that is sufficient to adequately cover a proposed action. one decisionmaker may determine that a certain Level of analysis is adequate, while another may conclude the exact opposite. Achieving a consensus within the agency and among the public can be problematic. Lacking definitive guidance, decisionmakers and critics alike may point to a universe of potential factors as the basis for defending their claim that an action is or is not adequately covered. Experience indicates that assertions are often based on ambiguous opinions that can be neither proved nor disproved. Lack of definitive guidance slows the decisionmaking process and can result in project delays. Furthermore, it can also Lead to inconsistencies in decisionmaking, inappropriate Levels of NEPA documentation, and increased risk of a project being challenged for inadequate coverage. A more systematic and less subjective approach for making such determinations is obviously needed. A paradigm for reducing the degree of subjectivity inherent in such decisions is presented in the following paper. The model is specifically designed to expedite the decisionmaking process by providing a systematic approach for making these determination. In many cases, agencies may find that using this model can reduce the analysis and size of NEPA documents.

Eccleston, C.H.

1994-11-01T23:59:59.000Z

59

Network-constrained models of liberalized electricity markets: the devil is in the details  

E-Print Network (OSTI)

submitted by generators, e.g., in PJM or Nordpool. If generators submit less energy to one node, then the higher price at 17 the node makes energy imports into that node more valuable. As a result, more of the scarce transmission capacity will be used...

Barquin, J; Boots, M G; Ehrenmann, A; Hobbs, Benjamin F; Neuhoff, Karsten; Rijkers, F A M

2004-06-16T23:59:59.000Z

60

A detailed kinetic modeling study of toluene oxidation in a premixed laminar flame  

DOE Green Energy (OSTI)

An improved chemical kinetic model for the toluene oxidation based on experimental data obtained in a premixed laminar low-pressure flame with vacuum ultraviolet (VUV) photoionization and molecular beam mass spectrometry (MBMS) techniques has been proposed. The present mechanism consists of 273 species up to chrysene and 1740 reactions. The rate constants of reactions of toluene, decomposition, reaction with oxygen, ipso-additions and metatheses with abstraction of phenylic H-atom are updated; new pathways of C{sub 4} + C{sub 2} species giving benzene and fulvene are added. Based on the experimental observations, combustion intermediates such as fulvenallene, naphtol, methylnaphthalene, acenaphthylene, 2-ethynylnaphthalene, phenanthrene, anthracene, 1-methylphenanthrene, pyrene and chrysene are involved in the present mechanism. The final toluene model leads to an overall satisfactory agreement between the experimentally observed and predicted mole fraction profiles for the major products and most combustion intermediates. The toluene depletion is governed by metathese giving benzyl radicals, ipso-addition forming benzene and metatheses leading to C{sub 6}H{sub 4}CH{sub 3} radicals. A sensitivity analysis indicates that the unimolecular decomposition via the cleavage of a C-H bond has a strong inhibiting effect, while decomposition via C-C bond breaking, ipso-addition of H-atom to toluene, decomposition of benzyl radicals and reactions related to C{sub 6}H{sub 4}CH{sub 3} radicals have promoting effect for the consumption of toluene. Moreover, flow rate analysis is performed to illustrate the formation pathways of mono- and polycyclic aromatics.

Tian, Z; Pitz, W J; Fournet, R; Glaude, P; Battin-Leclerc, F

2009-12-18T23:59:59.000Z

Note: This page contains sample records for the topic "model results detailed" 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

Reduced Form of Detailed Modeling of Wind Transmission and Intermittency for Use in Other ModelsReduced Form of Detailed Modeling of Wind Transmission and Intermittency for Use in Other Models  

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

SUPPLY CURVE FOR ONE-REGION MODEL SUPPLY CURVE FOR ONE-REGION MODEL Figure 7 is the final supply curve to be used in a one-region model, plotted as the sum of the major drivers (described below). * Wind Capital represents the difference in cost of the wind capacity installed in the one-region model and the WinDS model. The level increases because WinDS requires a greater wind capacity for the same wind generation than the one-region model. This is because:

62

Development of a data base and forecasting model for commercial-sector electricity usage and demand. Volume VII. Detailed survey, sampling methodology  

Science Conference Proceedings (OSTI)

This report describes the work performed toward obtaining two sets of primary data, from which econometric and engineering parameters for the model were to be derived. The first type will be collected in a mail survey of utility-company customers determined by an analysis of customer-account data. These data have been collected from Pacific Gas and Electric, Los Angeles Div. of Water and Power, San Diego Gas and Electric, and Sacramento Municipal Utility District (SMUD) and have been analyzed and the survey customers selected. The second type will consist of detailed technical data on buildings in the SMSA's of Los Angeles, San Diego, San Francisco, and Sacramento. This report presents the final methodology for the selection of building samples, by type and location, for the detailed building data collection. Eleven tables present the results of the analysis. Within service areas and/or SMSA's, significant establishment classifications are illustrated with their energy characteristics. The allocation of the detailed survey-sample members is illustrated, according to establishment classifications and the 24 different building types. This specification is further detailed as to allocations within the SMUD service area and those to be taken from other areas. The methodology presented in this final report is being used to select sample members for the detailed survey.

Not Available

1980-02-01T23:59:59.000Z

63

chapter 5. Detailed Tables  

U.S. Energy Information Administration (EIA) Indexed Site

5. Detailed Tables 5. Detailed Tables Chapter 5. Detailed Tables The following tables present detailed characteristics of vehicles in the residential sector. Data are from the 1994 Residential Transportation Energy Consumption Survey. Table Organization The "Detailed Tables" section consists of three types of tables: (1) Tables of totals such as number of vehicle-miles traveled (VMT) or gallons consumed; (2) tables of per household statistics such as VMT per household; and (3) tables of per-vehicle statistics, such as vehicle fuel consumption per vehicle. The tables have been grouped together by specific topics such as model-year data or family-income data to facilitate finding related information. The Quick-Reference Guide to the detailed tables indicates major topics of each table.

64

A Parameterization for Land–Atmosphere-Cloud Exchange (PLACE): Documentation and Testing of a Detailed Process Model of the Partly Cloudy Boundary Layer over Heterogeneous Land  

Science Conference Proceedings (OSTI)

This paper presents a general description of, and demonstrates the capabilities of, the Parameterization for Land–Atmosphere–Cloud Exchange (PLACE). The PLACE model is a detailed process model of the partly cloudy atmospheric boundary layer and ...

Peter J. Wetzel; Aaron Boone

1995-07-01T23:59:59.000Z

65

COMPARING MODEL RESULTS TO NATIONAL CLIMATE POLICY GOALS: RESULTS FROM THE ASIA MODELING EXERCISE  

SciTech Connect

While the world has yet to adopt a single unified policy to limit climate change, many countries and regions have adopted energy and climate policies that have implications for global emissions. In this paper, we discuss a few key policies and how they are included in a set of 24 energy and integrated assessment models that participated in the Asia Modeling Exercise. We also compare results from these models for a small set of stylized scenarios to the pledges made as part of the Copenhagen Accord and the goals stated by the Major Economies Forum. We find that the targets outlined by the United States, the European Union, Japan, and Korea require significant policy action in most of the models analyzed. For most of the models in the study, however, the goals outlined by India are met without any climate policy. The stringency of climate policy required to meet China’s Copenhagen pledges varies across models and accounting methodologies.

Calvin, Katherine V.; Fawcett, Allen A.; Jiang, Kejun

2012-12-01T23:59:59.000Z

66

Engineering Glass Passivation Layers -Model Results  

SciTech Connect

The immobilization of radioactive waste into glass waste forms is a baseline process of nuclear waste management not only in the United States, but worldwide. The rate of radionuclide release from these glasses is a critical measure of the quality of the waste form. Over long-term tests and using extrapolations of ancient analogues, it has been shown that well designed glasses exhibit a dissolution rate that quickly decreases to a slow residual rate for the lifetime of the glass. The mechanistic cause of this decreased corrosion rate is a subject of debate, with one of the major theories suggesting that the decrease is caused by the formation of corrosion products in such a manner as to present a diffusion barrier on the surface of the glass. Although there is much evidence of this type of mechanism, there has been no attempt to engineer the effect to maximize the passivating qualities of the corrosion products. This study represents the first attempt to engineer the creation of passivating phases on the surface of glasses. Our approach utilizes interactions between the dissolving glass and elements from the disposal environment to create impermeable capping layers. By drawing from other corrosion studies in areas where passivation layers have been successfully engineered to protect the bulk material, we present here a report on mineral phases that are likely have a morphological tendency to encrust the surface of the glass. Our modeling has focused on using the AFCI glass system in a carbonate, sulfate, and phosphate rich environment. We evaluate the minerals predicted to form to determine the likelihood of the formation of a protective layer on the surface of the glass. We have also modeled individual ions in solutions vs. pH and the addition of aluminum and silicon. These results allow us to understand the pH and ion concentration dependence of mineral formation. We have determined that iron minerals are likely to form a complete incrustation layer and we plan to look more closely at Vivianite [Fe3(PO4)2-8(H2O)] and Siderite [FeCO3] in the next stage of the project.

Skorski, Daniel C.; Ryan, Joseph V.; Strachan, Denis M.; Lepry, William C.

2011-08-08T23:59:59.000Z

67

H2A Delivery Models and Results  

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

of well defined "base cases" that span major markets and demand levels: Hydrogen Delivery Scenario Analysis Model (HDSAM) * Estimate the cost of H 2 delivery for base cases. *...

68

Analysis of Regional Climate Model Results for Simulations of Future Climates  

Science Conference Proceedings (OSTI)

Contemporary global climate models produce results that are too coarse to provide the level of detail required to evaluate environmental, social, and economic impacts of global climate change. High-resolution limited-area models (regional climate models) nested within the global model output have been used to create physically and spatially consistent climates with high spatial resolution. This report evaluates the effectiveness of these models.

2002-04-08T23:59:59.000Z

69

Further Results on Forecasting and Model Selection Under Asymmetric Loss  

E-Print Network (OSTI)

: We make three related contributions. First, we propose a new technique for solving prediction problems under asymmetric loss using piecewise-linear approximations to the loss function, and we establish existence and uniqueness of the optimal predictor. Second, we provide a detailed application to optimal prediction of a conditionally heteroskedastic process under asymmetric loss, the insights gained from which are broadly applicable. Finally, we incorporate our results into a general framework for recursive prediction-based model selection under the relevant loss function. Acknowledgements: Helpful discussion was provided by Adolf Buse, Hashem Pesaran, Dale Poirrier, Enrique Sentana, Jim Stock, Ken Wallis, participants at meetings of the Econometric Society World Congress, the NBER/NSF Forecasting Seminar, the UCSD Conference on Multivariate Financial Econometrics, and numerous university seminars. All remaining inadequacies are ours alone. We thank the National Science Foundation, t...

Peter F. Christoffersen; Francis X. Diebold

1996-01-01T23:59:59.000Z

70

Detailed Test Information  

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

Detailed Test Information Detailed Test Information EPA tests vehicles by running them through a series of driving routines, also called cycles or schedules, that specify vehicle speed for each point in time during the laboratory tests. For 2007 and earlier model year vehicles, only the city and highway schedules were used. Beginning with 2008 models, three additional tests will be used to adjust the city and highway estimates to account for higher speeds, air conditioning use, and colder temperatures. Note: EPA has established testing criteria for electric vehicles and plug-in hybrids that are slightly different than those for conventional vehicles. New Tests City Highway High Speed Air Conditioning Cold Temperature Detailed Comparison EPA Federal Test Procedure (City Schedule): Shows vehicle speed (mph) at each second of test

71

Mixed strategies for energy conservation and alternative energy utilization (solar) in buildings. Final report. Volume II. Detailed results. [New York, Atlanta, Omaha, and Albuquerque  

DOE Green Energy (OSTI)

The mixed-strategy analysis was a tradeoff analysis between energy-conservation methods and an alternative energy source (solar) considering technical and economic benefits. The objective of the analysis was to develop guidelines for: reducing energy requirements; reducing conventional fuel use; and identifying economic alternatives for building owners. The analysis was done with a solar system in place. This makes the study unique in that it is determining the interaction of energy conservation with a solar system. The study, therefore, established guidelines as to how to minimize capital investment while reducing the conventional fuel consumption through either a larger solar system or an energy-conserving technique. To focus the scope of energy-conservation techniques and alternative energy sources considered, five building types (house, apartment buildings, commercial buildings, schools, and office buildings) were selected. Finally, the lists of energy-conservation techniques and alternative energy sources were reduced to lists of manageable size by using technical attributes to select the best candidates for further study. The resultant energy-conservation techniques were described in detail and installed costs determined. The alternative energy source reduced to solar. Building construction characteristics were defined for each building for each of four geographic regions of the country. A mixed strategy consisting of an energy-conservation technique and solar heating/hot water/cooling system was analyzed, using computer simulation to determine the interaction between energy conservation and the solar system. Finally, using FEA fuel-price scenarios and installed costs for the solar system and energy conservation techniques, an economic analysis was performed to determine the cost effectiveness of the combination. (MCW)

None

1977-06-01T23:59:59.000Z

72

Annual Energy Outlook 1999 - Model Results & Report  

Gasoline and Diesel Fuel Update (EIA)

results.gif (6669 bytes) AEO99 Report Available Formats Entire AEO Report as Printed (PDF, 2.2MB) Overview (PDF, 132KB) Legislation and Regulations (PDF, 96KB) Issues in Focus...

73

Level-of-Detail Shaders  

E-Print Network (OSTI)

Current graphics hardware can render objects using simple procedural shaders in real-time. However, detailed, highquality shaders will continue to stress the resources of hardware for some time to come. Shaders written for film production and software renderers may stretch to thousands of lines. The difficulty of rendering efficiently is compounded when there is not just one, but a scene full of shaded objects, surpassing the capability of any hardware to render. This problem has many similarities to the rendering of large models, a problem that has inspired extensive research in geometric level-of-detail and geometric simplification. We introduce an analogous process for shading, shader simplification. Starting from an initial detailed shader, shader simplification produces a new shader with extra level-of-detail parameters that control the shader execution. The resulting level-of-detail shader, can automatically adjust its rendered appearance based on measures of distance, size, or importance as well as physical limits such as rendering time budget or texture usage.

Marc Olano; Bob Kuehne

2003-01-01T23:59:59.000Z

74

Cross-cooled dehumidifier model test results and computer simulations  

DOE Green Energy (OSTI)

Research on the development of a solar operated cross-cooled desiccant cooling system is described. A 15 cm x 15 cm x 15 cm (6'' x 6'' x 6'') cross-cooled silica gel desiccant dehumidifier model was designed, built and tested. The process of producing the silica gel sheets, the design and construction of the unit, the test setup and the test procedures are described in detail. A total of twenty tests were performed to determine the effect of inlet process stream dew point, process stream and cooling stream flowrates and regeneration stream temperature and dew point, on the performance of the unit. The test results show that the unit performance improves with increasing regeneration temperature, process stream flowrate and process air inlet dew point. The unit performance decreases with increase of the regeneration stream dew point. The results clearly show that the process stream inlet dew point is the dominating factor and that the concept of cross-cooling works very well. With moderate cross-cooling, the unit performance can increase over 50%. All tests were simulated by a computer program. The experimental and theoretical results are in very good agreement.

Mei, V.; Lavan, Z.

1979-11-01T23:59:59.000Z

75

The Effects NonIdentifiability on Testing for Detailed Balance Aggregated Markov Models for IonChannel Gating  

E-Print Network (OSTI)

equivalent condition products transition rates in clockwise counter­ clockwise direction same (Kelly, 1979 inspection of estimated two dimensional dwell time histograms. Below refer to model SM model. Both models

Timmer, Jens

76

Modeling and simulation of HVAC Results in EnergyPlus  

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

Modeling and simulation of HVAC Results in EnergyPlus Title Modeling and simulation of HVAC Results in EnergyPlus Publication Type Journal Article LBNL Report Number LBNL-5564E...

77

A Weighted Hybrid Fuzzy Result Merging Model for Metasearch  

Science Conference Proceedings (OSTI)

Result merging of search engine results for metasearch is a well explored area. However most result merging models try to collate document rankings from the search engines whose results are being merged into a single ranking using some mathematical function. ...

Arijit De; Elizabeth D. Diaz

2009-12-01T23:59:59.000Z

78

Detailed Simulations of Atmospheric Flow and Dispersion in Downtown Manhattan: An Application of Five Computational Fluid Dynamics Models  

Science Conference Proceedings (OSTI)

Computational fluid dynamics (CFD) model simulations of urban boundary layers have improved in speed and accuracy so that they are useful in assisting in planning emergency response activities related to releases of chemical or biological agents ...

Steven R. Hanna; Michael J. Brown; Fernando E. Camelli; Stevens T. Chan; William J. Coirier; Sura Kim; Olav R. Hansen; Alan H. Huber; R. Michael Reynolds

2006-12-01T23:59:59.000Z

79

Testing a Detailed Biophysical Parameterization for Land–Air Exchange in a High-Resolution Boundary-Layer Model  

Science Conference Proceedings (OSTI)

In order to properly model the influence of land surface properties on mesoscale atmospheric phenomena, it is important to include physically realistic parameterizations of major biophysical processes involved. The primary influence of the ...

S. Argentini; P. J. Wetzel; V. M. Karyampudi

1992-02-01T23:59:59.000Z

80

Detailed characterization and preliminary adsorption model for materials for an intermediate-scale reactive-transport experiment  

SciTech Connect

An experiment involving migration of fluid and tracers (Li, Br, Ni) through a 6-m-high x 3-m-dia caisson Wedron 510 sand, is being carried out for Yucca Mountain Site Characterization Project. Sand`s surface chemistry of the sand was studied and a preliminary surface-complexation model of Ni adsorption formulated for transport calculations. XPS and leaching suggest that surface of the quartz sand is partially covered by thin layers of Fe-oxyhydroxide and Ca-Mg carbonate and by flakes of kaolinite. Ni adsorption by the sand is strongly pH-dependent, showing no adsorption at pH 5 and near-total adsorption at pH 7. Location of adsorption edge is independent of ionic strength and dissolved Ni concentration; it is shifted to slightly lower pH with higher pCO2 and to slightly higher pH by competition with Li. Diminished adsorption at alkiline pH with higher pCO2 implies formation of dissolved Ni-carbonato complexes. Ni adsorption edges for goethite and quartz, two components of the sand were also measured. Ni adsorption on pure quartz is only moderately pH-dependent and differs in shape and location from that of the sand, whereas Ni adsorption by goethite is strongly pH-dependent. A triple-layer surface-complexation model developed for goethite provides a good fit to the Ni-adsorption curve of the sand. Based on this model, the apparent surface area of the Fe-oxyhydroxide coating is estimated to be 560 m{sup 2}/g, compatible with its occurrence as amorphous Fe-oxyhydroxide. Potentiometric titrations on sand also differ from pure quartz and suggest that effective surface area of sand may be much greater than that measured by N{sub 2}-BET gas adsorption. Attempts to model the adsorption of bulk sand in terms of properties of pure end member components suggest that much of the sand surface is inert. Although the exact Ni adsorption mechanisms remain ambiguous, this preliminary adsorption model provides an initial set of parameters that can be used in transport calculations.

Ward, D.B.; Bryan, C.R. [New Mexico Univ., Albuquerque, NM (United States). Dept. of Earth and Planetary Sciences; Siegel, M.D. [Sandia National Labs., Albuquerque, NM (United States)

1994-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "model results detailed" 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

TRECVID 2011 Runs and Detailed Results  

Science Conference Proceedings (OSTI)

... 3 NO AXES_DCU_4 4 TOPICS inbrief: Number: Type Text 9023 OBJECT setting sun 9024 LOCATION upstairs, inside the windmill 9025 OBJECT ...

82

TRECVID 2012 Runs and Detailed Results  

Science Conference Proceedings (OSTI)

... Glasses 297. ... Skier 440. Soldiers 10 FEATUREPAIRS (judged): 901 Beach + Mountain 902 Old_People + Flags 903 Animal + Snow 904 Bird ...

83

TRECVID 2011 Runs and Detailed Results  

Science Conference Proceedings (OSTI)

... nofa.0 PKU-IDM.m.balanced.cascade Peking University-IDM PKU-IDM.m.nofa. cascade PRISMA.m.balanced.EhdGry University of Chile PRISMA.m ...

84

TRECVID 2012 Runs and Detailed Results  

Science Conference Proceedings (OSTI)

... University NO PKU-ICST-MIPL 3 NO PKU-ICST-MIPL 4 NO prisma-four90px 2 Department of Computer Science, University of Chile NO prisma ...

85

1992 CBECS Detailed Tables  

Gasoline and Diesel Fuel Update (EIA)

Detailed Tables Detailed Tables To download all 1992 detailed tables: Download Acrobat Reader for viewing PDF files. Yellow Arrow Buildings Characteristics Tables (PDF format) (70 tables, 230 pages, file size 1.39 MB) Yellow Arrow Energy Consumption and Expenditures Tables (PDF format) (47 tables, 208 pages, file size 1.28 MB) Yellow Arrow Energy End-Use Tables (PDF format) (6 tables, 6 pages, file size 31.7 KB) Detailed tables for other years: Yellow Arrow 1999 CBECS Yellow Arrow 1995 CBECS Background information on detailed tables: Yellow Arrow Description of Detailed Tables and Categories of Data Yellow Arrow Statistical Significance of Data 1992 Commercial Buildings Energy Consumption Survey (CBECS) Detailed Tables Data from the 1992 Commercial Buildings Energy Consumption Survey (CBECS) are presented in three groups of detailed tables:

86

1995 Detailed Tables  

U.S. Energy Information Administration (EIA) Indexed Site

Households, Buildings & Industry > Commercial Buildings Energy Households, Buildings & Industry > Commercial Buildings Energy Consumption Survey > Detailed Tables 1995 Detailed Tables Data from the 1995 Commercial Buildings Energy Consumption Survey (CBECS) are presented in three groups of detailed tables: Buildings Characteristics Tables, number of buildings and amount of floorspace for major building characteristics. Energy Consumption and Expenditures Tables, energy consumption and expenditures for major energy sources. Energy End-Use Data, total, electricity and natural gas consumption and energy intensities for nine specific end-uses. Summary Table—All Principal Buildings Activities (HTML Format) Background information on detailed tables: Description of Detailed Tables and Categories of Data Statistical Significance of Data

87

Model NbTi Helical Solenoid Fabrication and Test Results  

Science Conference Proceedings (OSTI)

A program to develop model magnets for a helical cooling channel is under way at Fermilab. In the first steps of a planned sequence of magnets, two four-coil helical solenoid models with 300 mm aperture have been fabricated and tested. These two models, HSM01 and HSM02, used insulated NbTi Rutherford cable wound onto stainless steel rings with spliceless transitions between coils. Strip heaters were included for quench protection of each coil, and the coils were epoxy-impregnated after winding inside the support structures. Based on the results of the first model the second model was made using a cable with optimized cross-section, improved winding and epoxy-impregnation procedures, enhanced ground insulation, and included heat exchange tubing for a test of conduction cooling. We report on the results and lessons learned from fabrication and tests of these two models.

Andreev, N.; Barzi, E.; Chlachidze, G.; Evbota, D.; Kashikhin, V.S.; Kashikhin, V.V.; Lamm, M.J.; Makarov, A.; Novitski, I.; Orris, D.F.; Tartaglia, M.A.; /Fermilab

2011-09-01T23:59:59.000Z

88

A DETAILED MORPHO-KINEMATIC MODEL OF THE ESKIMO, NGC 2392: A UNIFYING VIEW WITH THE CAT'S EYE AND SATURN PLANETARY NEBULAE  

Science Conference Proceedings (OSTI)

The three-dimensional and kinematic structure of the Eskimo nebula, NGC 2392, has been notoriously difficult to interpret in detail given its complex morphology, multiple kinematic components and its nearly pole-on orientation along the line of sight. We present a comprehensive, spatially resolved, high-resolution, long-slit spectroscopic mapping of the Eskimo planetary nebula. The data consist of 21 spatially resolved, long-slit echelle spectra tightly spaced over the Eskimo and along its bipolar jets. This data set allows us to construct a velocity-resolved [N II] channel map of the nebula with a resolution of 10 km s{sup -1} that disentangles its different kinematic components. The spectroscopic information is combined with Hubble Space Telescope images to construct a detailed three-dimensional morpho-kinematic model of the Eskimo using the code SHAPE. With this model we demonstrate that the Eskimo is a close analog to the Saturn and the Cat's Eye nebulae, but rotated 90 Degree-Sign to the line of sight. Furthermore, we show that the main characteristics of our model apply to the general properties of the group of elliptical planetary nebulae with ansae or FLIERS, once the orientation is considered. We conclude that this kind of nebula belongs to a class with a complex common evolutionary sequence of events.

Garcia-Diaz, Ma. T.; Lopez, J. A.; Steffen, W.; Richer, M. G., E-mail: tere@astrosen.unam.mx, E-mail: jal@astrosen.unam.mx, E-mail: wsteffen@astrosen.unam.mx, E-mail: richer@astrosen.unam.mx [Instituto de Astronomia, Universidad Nacional Autonoma de Mexico, Campus Ensenada, Ensenada, Baja California, 22800 (Mexico)

2012-12-20T23:59:59.000Z

89

Anthropogenic Warming of the Oceans: Observations and Model Results  

Science Conference Proceedings (OSTI)

Observations show the oceans have warmed over the past 40 yr, with appreciable regional variation and more warming at the surface than at depth. Comparing the observations with results from two coupled ocean–atmosphere climate models [the ...

David W. Pierce; Tim P. Barnett; Krishna M. AchutaRao; Peter J. Gleckler; Jonathan M. Gregory; Warren M. Washington

2006-05-01T23:59:59.000Z

90

Annual Energy Outlook with Projections to 2025-Model Results  

Gasoline and Diesel Fuel Update (EIA)

4 with Projections to 2025 Data Tables Adobe Acrobat Reader Logo Adobe Acrobat Reader is required for PDF format MS Excel Viewer Spreadsheets are provided in excel Model Results in...

91

Annual Energy Outlook with Projections to 2025-Model Results  

Gasoline and Diesel Fuel Update (EIA)

5 with Projections to 2025 Data Tables Adobe Acrobat Reader Logo Adobe Acrobat Reader is required for PDF format MS Excel Viewer Spreadsheets are provided in excel Model Results in...

92

Results of a model for premixed combustion oscillation  

DOE Green Energy (OSTI)

Combustion oscillations are receiving renewed research interest due to the increasing application of lean premix (LPM) combustion to gas turbines. A simple, nonlinear model for premixed combustion is described in this paper. The model was developed to help explain specific experimental observations, and to provide guidance for the development of active control schemes based on nonlinear concepts. The model can be used to quickly examine instability trends associated with changes in equivalence ratio, mass flow rate, geometry, ambient conditions, and other pertinent factors. The model represents the relevant processes occurring in a fuel nozzle and combustor which are analogous to current LPM turbine combustors. Conservation equations for the fuel nozzle and combustor are developed from simple control volume analysis, providing a set of ordinary differential equations that can be solved on a personal computer. Combustion is modeled as a stirred reactor, with a bi- molecular reaction rate between fuel and air. A variety of numerical results and comparisons to experimental data are presented to demonstrate the utility of the model. Model results are used to understand the fundamental mechanisms which drive combustion oscillations, the effects of inlet air temperature and nozzle geometry on instability, and the effectiveness of active control schemes. The technique used in the model may also be valuable to understand oscillations in low NO{sub x} industrial burners.

Janus, M.C.; Richards, G.A.

1996-12-31T23:59:59.000Z

93

Results of a model for premixed combustion oscillations  

DOE Green Energy (OSTI)

Combustion oscillations are receiving renewed research interest due to increasing use of lean premix (LPM) combustion to gas turbines. A simple, nonlinear model for premixed combustion is described in this paper. The model was developed to help explain specific experimental observations and to provide guidance for development of active control schemes based on nonlinear concepts. The model can be used to quickly examine instability trends associated with changes in equivalence ratio, mass flow rate, geometry, ambient conditions, etc. The model represents the relevant processes occurring in a fuel nozzle and combustor which are analogous to current LPM turbine combustors. Conservation equations for the fuel nozzle and combustor are developed from simple control volume analysis, providing a set of ordinary differential equations that can be solved on a personal computer. Combustion is modeled as a stirred reactor, with a bimolecular reaction rate between fuel and air. A variety of numerical results and comparisons to experimental data are presented to demonstrate the utility of the model. Model results are used to understand the fundamental mechanisms which drive combustion oscillations, effects of inlet air temperature and nozzle geometry on instability, and effectiveness of open loop control schemes.

Janus, M.C.; Richards, G.A.

1996-09-01T23:59:59.000Z

94

Detailed chemical kinetic models for large n-alkanes and iso-alkanes found in conventional and F-T diesel fuels  

DOE Green Energy (OSTI)

Detailed chemical kinetic models are needed to simulate the combustion of current and future transportation fuels. These models should represent the various chemical classes in these fuels. Conventional diesel fuels are composed of n-alkanes, iso-alkanes, cycloalkanes and aromatics (Farrell et al. 2007). For future fuels, there is a renewed interest in Fischer-Tropsch (F-T) processes which can be used to synthesize diesel and other transportation fuels from biomass, coal and natural gas. F-T diesel fuels are expected to be similar to F-T jet fuels which are commonly comprised of iso-alkanes with some n-alkanes (Smith and Bruno, 2008). Thus, n-alkanes and iso-alkanes are common chemical classes in these conventional and future fuels. This paper reports on the development of chemical kinetic models of large n-alkanes and iso-alkanes to represent these chemical classes in conventional and future fuels. Two large iso-alkanes are 2,2,4,4,6,8,8-heptamethylnonane, which is a primary reference fuel for diesel, and isooctane, a primary reference fuel for gasoline. Other iso-alkanes are branched alkanes with a single methyl side chain, typical of most F-T fuels. The chemical kinetic models are then used to predict the effect of these fuel components on ignition characteristics under conditions found in internal combustion engines.

Westbrook, C K; Pitz, W J; Curran, H J; Mehl, M

2008-12-15T23:59:59.000Z

95

1999 CBECS Detailed Tables  

U.S. Energy Information Administration (EIA) Indexed Site

Commercial Buildings Energy Consumption Survey (CBECS) > Detailed Tables Commercial Buildings Energy Consumption Survey (CBECS) > Detailed Tables 1999 CBECS Detailed Tables Building Characteristics | Consumption & Expenditures Data from the 1999 Commercial Buildings Energy Consumption Survey (CBECS) are presented in the Building Characteristics tables, which include number of buildings and total floorspace for various Building Characteristics, and Consumption and Expenditures tables, which include energy usage figures for major energy sources. A table of Relative Standard Errors (RSEs) is included as a worksheet tab in each Excel tables. Complete sets of RSE tables are also available in .pdf format. (What is an RSE?) Preliminary End-Use Consumption Estimates for 1999 | Description of 1999 Detailed Tables and Categories of Data

96

Annual Energy Outlook with Projections to 2025-Model Results  

Gasoline and Diesel Fuel Update (EIA)

Model Results Model Results (To view or print in PDF format, Adobe Acrobat Reader 5.0 is required Download Acrobat Reader Now.) Adobe Acrobat Logo AEO2003 Appendix Tables XLS format A - Reference Case Forecast - PDF (728KB) Reference Case Forecast, Annual 2000-2025 - PDF (1115KB), HTML, XLS B - Economic Growth Case Comparisons - PDF (190KB) High Economic Case, Annual 2000-2025 - PDF (2482KB), XLS Low Economic Case, Annual 2000-2025 - PDF (3937KB), XLS C - Oil Price Case Comparisons - PDF (186KB) High Oil Price Case, Annual 2000-2025 - PDF (2533KB), XLS Low Oil Price Case, Annual 2000-2025 - PDF (2344KB), XLS D - Crude Oil Equivalence Summary - PDF (32KB) E - Household Expenditures - PDF (30KB) F - Results from Side Cases - PDF (89KB) G - Major Assumptions for the Forecast - PDF (160KB), HTML

97

2003 CBECS Detailed Tables: Summary  

U.S. Energy Information Administration (EIA) Indexed Site

2003 Detailed Tables 2003 Detailed Tables 2003 CBECS Detailed Tables most recent available Released: September 2008 Building Characteristics | Consumption & Expenditures | End-Use Consumption In the 2003 CBECS, the survey procedures for strip shopping centers and enclosed malls ("mall buildings") were changed from those used in previous surveys, and, as a result, mall buildings are now excluded from most of the 2003 CBECS tables. Therefore, some data in the majority of the tables are not directly comparable with previous CBECS tables, all of which included mall buildings. Some numbers in the 2003 tables will be slightly lower than earlier surveys since the 2003 figures do not include mall buildings. See "Change in Data Collection Procedures for Malls" for a more detailed explanation.

98

Models and Results Database (MAR-D), Version 4. 0  

SciTech Connect

The Nuclear Regulatory Commission's Office of Nuclear Regulatory Research (NRC-RES) is presently funding the development of the Models and Results Database (MAR-D) at the Idaho National Engineering Laboratory. MAR-D's primary function is to create a data repository for NUREG-1150 and other permanent data by providing input, conversion, and output capabilities for data used by IRRAS, SARA, SETS, and FRANTIC personal computer (PC) codes. As probabilistic risk assessments and individual plant examinations are submitted to the NRC for review, MAR-D can be used to convert the models and results from the study for use with IRRAS and SARA. Then, these data can be easily accessed by future studies and will be in a form that will enhance the analysis process. This reference manual provides an overview of the function available within MAR-D and step-by-step operating instructions.

Branham-Haar, K.A.; Dinneen, R.A.; Russell, K.D.; Skinner, N.L. (EG and G Idaho, Inc., Idaho Falls, ID (United States))

1992-05-01T23:59:59.000Z

99

ORIGEN2 model and results for the Clinch River Breeder Reactor  

Science Conference Proceedings (OSTI)

Reactor physics calculations and literature information acquisition have led to the development of a Clinch River Breeder Reactor (CRBR) model for the ORIGEN2 computer code. The model is based on cross sections taken directly from physics codes. Details are presented concerning the physical description of the fuel assemblies, the fuel management scheme, irradiation parameters, and initial material compositions. The ORIGEN2 model for the CRBR has been implemented, resulting in the production of graphical and tabular characteristics (radioactivity, thermal power, and toxicity) of CRBR spent fuel, high-level waste, and fuel-assembly structural material waste as a function of decay time. Characteristics for pressurized water reactors (PWRs), commercial liquid-metal fast breeder reactors (LMFBRs), and the Fast Flux Test Facility (FFTF) have also been included in this report for comparison with the CRBR data.

Croff, A.G.; Bjerke, M.A.

1982-06-01T23:59:59.000Z

100

DIRECT N-BODY MODELING OF THE OLD OPEN CLUSTER NGC 188: A DETAILED COMPARISON OF THEORETICAL AND OBSERVED BINARY STAR AND BLUE STRAGGLER POPULATIONS  

SciTech Connect

Following on from a recently completed radial-velocity survey of the old (7 Gyr) open cluster NGC 188 in which we studied in detail the solar-type hard binaries and blue stragglers of the cluster, here we investigate the dynamical evolution of NGC 188 through a sophisticated N-body model. Importantly, we employ the observed binary properties of the young (180 Myr) open cluster M35, where possible, to guide our choices for parameters of the initial binary population. We apply pre-main-sequence tidal circularization and a substantial increase to the main-sequence tidal circularization rate, both of which are necessary to match the observed tidal circularization periods in the literature, including that of NGC 188. At 7 Gyr the main-sequence solar-type hard-binary population in the model matches that of NGC 188 in both binary frequency and distributions of orbital parameters. This agreement between the model and observations is in a large part due to the similarities between the NGC 188 and M35 solar-type binaries. Indeed, among the 7 Gyr main-sequence binaries in the model, only those with P {approx}> 1000 days begin to show potentially observable evidence for modifications by dynamical encounters, even after 7 Gyr of evolution within the star cluster. This emphasizes the importance of defining accurate initial conditions for star cluster models, which we propose is best accomplished through comparisons with observations of young open clusters like M35. Furthermore, this finding suggests that observations of the present-day binaries in even old open clusters can provide valuable information on their primordial binary populations. However, despite the model's success at matching the observed solar-type main-sequence population, the model underproduces blue stragglers and produces an overabundance of long-period circular main-sequence-white-dwarf binaries as compared with the true cluster. We explore several potential solutions to the paucity of blue stragglers and conclude that the model dramatically underproduces blue stragglers through mass-transfer processes. We suggest that common-envelope evolution may have been incorrectly imposed on the progenitors of the spurious long-period circular main-sequence-white-dwarf binaries, which perhaps instead should have gone through stable mass transfer to create blue stragglers, thereby bringing both the number and binary frequency of the blue straggler population in the model into agreement with the true blue stragglers in NGC 188. Thus, improvements in the physics of mass transfer and common-envelope evolution employed in the model may in fact solve both discrepancies with the observations. This project highlights the unique accessibility of open clusters to both comprehensive observational surveys and full-scale N-body simulations, both of which have only recently matured sufficiently to enable such a project, and underscores the importance of open clusters to the study of star cluster dynamics.

Geller, Aaron M. [Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA) and Department of Physics and Astronomy, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208 (United States); Hurley, Jarrod R. [Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn, VIC 3122 (Australia); Mathieu, Robert D., E-mail: a-geller@northwestern.edu, E-mail: mathieu@astro.wisc.edu, E-mail: jhurley@astro.swin.edu.au [Department of Astronomy, University of Wisconsin-Madison, Madison, WI 53706 (United States)

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "model results detailed" 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

Comparison of Blade-Strike Modeling Results with Empirical Data  

DOE Green Energy (OSTI)

This study is the initial stage of further investigation into the dynamics of injury to fish during passage through a turbine runner. As part of the study, Pacific Northwest National Laboratory (PNNL) estimated the probability of blade strike, and associated injury, as a function of fish length and turbine operating geometry at two adjacent turbines in Powerhouse 1 of Bonneville Dam. Units 5 and 6 had identical intakes, stay vanes, wicket gates, and draft tubes, but Unit 6 had a new runner and curved discharge ring to minimize gaps between the runner hub and blades and between the blade tips and discharge ring. We used a mathematical model to predict blade strike associated with two Kaplan turbines and compared results with empirical data from biological tests conducted in 1999 and 2000. Blade-strike models take into consideration the geometry of the turbine blades and discharges as well as fish length, orientation, and distribution along the runner.

Carlson, Thomas J.; Ploskey, Gene R.

2004-05-06T23:59:59.000Z

102

Loss of spent fuel pool cooling PRA: Model and results  

Science Conference Proceedings (OSTI)

This letter report documents models for quantifying the likelihood of loss of spent fuel pool cooling; models for identifying post-boiling scenarios that lead to core damage; qualitative and quantitative results generated for a selected plant that account for plant design and operational practices; a comparison of these results and those generated from earlier studies; and a review of available data on spent fuel pool accidents. The results of this study show that for a representative two-unit boiling water reactor, the annual probability of spent fuel pool boiling is 5 {times} 10{sup {minus}5} and the annual probability of flooding associated with loss of spent fuel pool cooling scenarios is 1 {times} 10{sup {minus}3}. Qualitative arguments are provided to show that the likelihood of core damage due to spent fuel pool boiling accidents is low for most US commercial nuclear power plants. It is also shown that, depending on the design characteristics of a given plant, the likelihood of either: (a) core damage due to spent fuel pool-associated flooding, or (b) spent fuel damage due to pool dryout, may not be negligible.

Siu, N.; Khericha, S.; Conroy, S.; Beck, S.; Blackman, H.

1996-09-01T23:59:59.000Z

103

Detailed modeling and laser-induced fluorescence imaging of nitric oxide in a NH(i)-seeded non-premixed methane/air flame  

Science Conference Proceedings (OSTI)

In this paper we study the formation of NO in laminar, nitrogen diluted methane diffusion flames that are seeded with ammonia in the fuel stream. We have performed numerical simulations with detailed chemistry as well as laser-induced fluorescence imaging measurements for a range of ammonia injection rates. For comparison with the experimental data, synthetic LIF images are calculated based on the numerical data accounting for temperature and fluorescence quenching effects. We demonstrate good agreement between measurements and computations. The LIF corrections inferred from the simulation are then used to calculate absolute NO mole fractions from the measured signal.The NO formation in both doped and undoped flames occurs in the flame sheet. In the undoped flame, four different mechanisms including thermal and prompt NO appear to contribute to NO formation. As the NH3 seeding level increases, fuel-NO becomes the dominant mechanism and N2 shifts from being a net reactant to being a net product. Nitric oxide in the undoped flame as well as in the core region of the doped flames are underpredicted by the model; we attribute this mainly to inaccuracies in the NO recycling chemistry on the fuel-rich side of the flame sheet.

Bell, John B.; Day, Marcus S.; Grcar, Joseph F.; Bessler, Wolfgang G.; Schulz, Christof; Glarborg, Peter; Jensen, Anker D.

2001-12-14T23:59:59.000Z

104

Evidence for ultra-fast outflows in radio-quiet AGNs: II - detailed photo-ionization modeling of Fe K-shell absorption lines  

E-Print Network (OSTI)

X-ray absorption line spectroscopy has recently shown evidence for previously unknown Ultra-fast Outflows (UFOs) in radio-quiet AGNs. In the previous paper of this series we defined UFOs as those absorbers with an outflow velocity higher than 10,000km/s and assessed the statistical significance of the associated blueshifted FeK absorption lines in a large sample of 42 local radio-quiet AGNs observed with XMM-Newton. In the present paper we report a detailed curve of growth analysis and directly model the FeK absorbers with the Xstar photo-ionization code. We confirm that the frequency of sources in the radio-quiet sample showing UFOs is >35%. The outflow velocity distribution spans from \\sim10,000km/s (\\sim0.03c) up to \\sim100,000km/s (\\sim0.3c), with a peak and mean value of \\sim42,000km/s (\\sim0.14c). The ionization parameter is very high and in the range log\\xi 3-6erg s^{-1} cm, with a mean value of log\\xi 4.2 erg s^{-1} cm. The associated column densities are also large, in the range N_H\\sim10^{22}-10^{24...

Tombesi, F; Reeves, J N; Palumbo, G G C; Braito, V; Dadina, M

2011-01-01T23:59:59.000Z

105

Clean Cities: NewsDetail  

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

Tweet about Clean Cities: NewsDetail on Twitter Bookmark Clean Cities: NewsDetail on Google Bookmark Clean Cities: NewsDetail on Delicious Rank Clean Cities: NewsDetail on Digg...

106

Detailed Course Module Description  

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

Course Module Description Course Module Description Module/Learning Objectives Level of Detail in Module by Audience Consumers Gen Ed/ Community College Trades 1. Energy Issues and Building Solutions High High High Learning Objectives: * Define terms of building science, ecological systems, economics of consumption * Relate building science perspective, ecology, social science * Explain historical energy and environmental issues related to buildings * Compare Site and source energy * Examine the health, safety and comfort issues in buildings * Examine the general context for building solutions (zero energy green home with durability as the goal) * Explain a basic overview of alternative energy (total solar flux) - do we have enough energy * Examine cash flow to homeowners

107

Simulating flame lift-off characteristics of diesel and biodiesel fuels using detailed chemical-kinetic mechanisms and LES turbulence model.  

DOE Green Energy (OSTI)

Combustion in direct-injection diesel engines occurs in a lifted, turbulent diffusion flame mode. Numerous studies indicate that the combustion and emissions in such engines are strongly influenced by the lifted flame characteristics, which are in turn determined by fuel and air mixing in the upstream region of the lifted flame, and consequently by the liquid breakup and spray development processes. From a numerical standpoint, these spray combustion processes depend heavily on the choice of underlying spray, combustion, and turbulence models. The present numerical study investigates the influence of different chemical kinetic mechanisms for diesel and biodiesel fuels, as well as Reynolds-averaged Navier-Stokes (RANS) and large eddy simulation (LES) turbulence models on predicting flame lift-off lengths (LOLs) and ignition delays. Specifically, two chemical kinetic mechanisms for n-heptane (NHPT) and three for biodiesel surrogates are investigated. In addition, the RNG k-{epsilon} (RANS) model is compared to the Smagorinsky based LES turbulence model. Using adaptive grid resolution, minimum grid sizes of 250 {micro}m and 125 {micro}m were obtained for the RANS and LES cases respectively. Validations of these models were performed against experimental data from Sandia National Laboratories in a constant volume combustion chamber. Ignition delay and flame lift-off validations were performed at different ambient temperature conditions. The LES model predicts lower ignition delays and qualitatively better flame structures compared to the RNG k-{epsilon} model. The use of realistic chemistry and a ternary surrogate mixture, which consists of methyl decanoate, methyl 9-decenoate, and NHPT, results in better predicted LOLs and ignition delays. For diesel fuel though, only marginal improvements are observed by using larger size mechanisms. However, these improved predictions come at a significant increase in computational cost.

Som, S; Longman, D. E.; Luo, Z; Plomer, M; Lu, T; Senecal, P.K.; Pomraning, E (Energy Systems); (Univ. of Connecticut); (CONVERGENT Science)

2012-01-01T23:59:59.000Z

108

Improvements to Hydrogen Delivery Scenario Analysis Model (HDSAM) and Results  

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

to Hydrogen to Hydrogen Delivery Scenario Analysis Model (HDSAM) and Results May 8, 2007 Amgad Elgowainy Argonne National Laboratory Comparison of Delivery Pathways- V1.0 vs. V2.0 2 1 3 i delivery by a Loading, the plant Version 1.0 character zed components for 3 pathways with single mode. conditioning and storage are at or adjacent to Liquid Hydrogen (LH) Truck H2 Production 100 or 1500 kg/d Compressed H2 (CH) Truck H2 Production 3 or 7 kpsi 100 or 1500 kg/d H2 Production Gaseous H2 Pipeline 100 or 1500 kg/d HDSAM V1.0 Estimates Delivery Cost for 3 Pathways 4 H2 H2 1 2 3 H2 Distribution and Ci I. Liquid H2 Distribution: HDSAM V2.0 Simulates Nine Pathways Production Production LH Terminal LH Terminal Production LH Terminal Transmission Transmission Distribution

109

Annual Energy Outlook 2002 with Projections to 2020 - Model Results  

Gasoline and Diesel Fuel Update (EIA)

Model Results To view PDF Files, Download Free Copy of Adobe Reader Get Acrobat Reader Logo AEO2002 Report Available Formats Entire AEO Report as Printed (PDF, 2,292KB) Preface (PDF, 52KB) Overview (PDF, 117KB) Legislation and Regulations (PDF, 119KB) Issues in Focus (PDF, 172KB) Market Trends Macroeconomic & International Oil Market (PDF, 99KB) Energy Demand (PDF, 99KB) Electricity (PDF, 99KB) Oil and Gas (PDF, 99KB) Coal & Carbon Emissions (PDF, 99KB) Forecast Comparisons (PDF, 83KB) List of Acronyms (PDF, 99KB) Notes and Sources (PDF, 99KB) AEO2002 Appendix Tables XLS format A - Reference Case Forecast PDF (243KB) Reference Case Forecast, Annual 1999-2020 PDF (345KB), HTML, XLS B - Economic Growth Case Comparisons PDF (277KB)

110

Facilitated oriented spin models:some non equilibrium results  

E-Print Network (OSTI)

We analyze the relaxation to equilibrium for kinetically constrained spin models (KCSM) when the initial distribution $\

Nicoletta Cancrini; Fabio Martinelli; Roberto H. Schonmann; Cristina Toninelli

2008-10-23T23:59:59.000Z

111

Results of a near field physical model study  

DOE Green Energy (OSTI)

A physical model study is ongoing to investigate the sensitivity of recirculation and near field plume dynamics to variation in OTEC plant design and ambient ocean conditions. A thermally-stratified 18 x 12 x 0.6 m basin at a nominal scale of 1/300 allows the upper 180 m of the ocean to be studied for plant sizes up to 600 MW(e). Tests have been conducted for stagnant conditions and for conditions with a current, using both the mixed discharge (combined evaporator and condenser) and non-mixed discharge concepts. Separate tests were made to investigate interactions between evaporator and condenser discharges in a non-mixed concept. Measurements include temperature, dye concentration, mean velocity and visual observations obtained from still and motion pictures. Results for the stagnant water tests showed no significant recirculation except for those tests where the discharge ports were oriented (slightly) upward or where the largest plant size (600 MW(e)) was tested. No significant difference in recirculation could be discerned between the mixed and the non-mixed discharge designs although differences in the equilibrium positions of the discharge plumes were noted. Tests in a current are still in progress but some preliminary results are presented.

Adams, E.E.; Fry, D.J.; Coxe, D.H.

1979-01-01T23:59:59.000Z

112

Results of EPRI/ANL DCH investigations and model development  

DOE Green Energy (OSTI)

The results of a series of five experiments are described addressing the severity and mitigation of direct containment heating. The tests were performed in a 1:30 linear scale mockup of the Zion PWR containment system using a reactor-material corium melt consisting of 60% UO/sub 2/, 16% ZrO/sub 2/, 24% SSt at nominally 2800C initial temperature. A ''worst-case'' type test involving unimpeded corium dispersal through an air atmosphere in a closed vessel produced an atmosphere heatup of 323K, equivalent to a DCH efficiency of 62%. With the addition of structural features which impeded the corium dispersal, representative of dispersal pathway features at Zion, the DCH efficiency was reduced to 1--5%. (This important result is scale dependent and requires larger scale tests such as the SURTSEY program at SNL plus mechanistic modeling for application to the reactor system.) With the addition of water in the cavity region, there was no measurable heatup of the atmosphere. This was attributable to the vigorous codispersal of water with corium which prevented the temperature of the atmosphere from significantly exceeding T/sub sat/. In this case the DCH load was replaced by the more benign ''steam spike'' from corium quench. Significant oxidation of the corium constituents occurred in the tests, adding chemical energy to the system and producing hydrogen. Overall, the results suggest that with consideration of realistic, plant specific, mitigating features, DCH may be no worse and possibly far less severe than the previously examined steam spike. Implications for accident management are addressed. 17 refs., 7 figs., 4 tabs.

Spencer, B.W.; Sienicki, J.J.; Sehgal, B.R.; Merilo, M.

1988-01-01T23:59:59.000Z

113

Role of adsorption kinetics in the low-temperature Si growth by gas-source molecular beam epitaxy: In situ observations and detailed modeling of the growth  

SciTech Connect

The growth rate and surface hydrogen coverage during Si gas-source molecular beam epitaxy using disilane have been obtained as functions of both the growth temperature and the source-gas pressure. The activation energy of the low-temperature (<600{sup o}C) growth rate was found to increase with the source-gas pressure, indicating a contribution by the adsorption process in these low-temperature growth kinetics. Several growth models have been constructed based on the results, among which the two-site/four-site-adsorption model [M. Suemitsu Jpn. J. Appl. Phys., Part 236, L625 (1997)] showed the best fit to both the growth rate and the hydrogen coverage. {copyright} 2001 American Institute of Physics.

Murata, Takeshi; Nakazawa, Hideki; Tsukidate, Yoshikazu; Suemitsu, Maki

2001-08-06T23:59:59.000Z

114

Arctic Precipitation and Evaporation: Model Results and Observational Estimates  

Science Conference Proceedings (OSTI)

Observational estimates of precipitation and evaporation over the Arctic Ocean and its terrestrial watersheds are compared with corresponding values from the climate model simulations of the Atmospheric Model Intercomparison Project (AMIP). ...

John E. Walsh; Vladimir Kattsov; Diane Portis; Valentin Meleshko

1998-01-01T23:59:59.000Z

115

Comprehensive Electricity Competition Act: A Comparison of Model Results, The  

Reports and Publications (EIA)

This report describes EIA's use of the National Energy Modeling System (NEMS) to evaluate the effects of the Administration's restructuring proposal using the parameter settings and assumptions from the Policy Office Electricity Modeling System (POEMS) analysis.

Andy S. Kydes

1999-09-01T23:59:59.000Z

116

User modelling for live help systems: initial results  

Science Conference Proceedings (OSTI)

This paper explores the role of user modelling in live help systems for e-commerce web sites. There are several potential benefits with user modelling in this context: 1) Human assistants can use the personal information in the user models to provide ...

Johan Aberg; Nahid Shahmehri; Dennis Maciuszek

2001-10-01T23:59:59.000Z

117

Preliminary results of model predictive control of shading systems (WIP)  

Science Conference Proceedings (OSTI)

Shades in buildings are widely installed and are an effective technique for managing solar gains and occupant comfort. A model of a typical office space located in Ottawa, Ontario has been created and the model was developed for analysis under variable ... Keywords: energy management system, model predictive control, reactive control, shades

Brent Huchuk; William O'Brien; Cynthia A. Cruickshank

2013-04-01T23:59:59.000Z

118

Detailed residential electric determination  

DOE Green Energy (OSTI)

Data on residential loads has been collected from four residences in real time. The data, measured at 5-second intervals for 53 days of continuous operation, were statistically characterized. An algorithm was developed and incorporated into the modeling code SOLCEL. Performance simulations with SOLCEL using these data as well as previous data collected over longer time intervals indicate that no significant errors in system value are introduced through the use of long-term average data.

Not Available

1984-06-01T23:59:59.000Z

119

Energetic neutral atom imaging with the Polar CEPPAD/IPS instrument: Initial forward modeling results  

SciTech Connect

Although the primary function of the CEP-PAD/IPS instrument on Polar is the measurement of energetic ions in-situ, it has also proven to be a very capable Energetic neutral Atom (ENA) imager. Raw ENA images are currently being constructed on a routine basis with a temporal resolution of minutes during both active and quiet times. However, while analyses of these images by themselves provide much information on the spatial distribution and dynamics of the energetic ion population in the ring current, detailed modeling is required to extract the actual ion distributions. In this paper, the authors present the initial results of forward modeling an IPS ENA image obtained during a small geo-magnetic storm on June 9, 1997. The equatorial ion distribution inferred with this technique reproduces the expected large noon/midnight and dawn/dusk asymmetries. The limitations of the model are discussed and a number of modifications to the basic forward modeling technique are proposed which should significantly improve its performance in future studies.

Henderson, M.G.; Reeves, G.D.; Moore, K.R. [Los Alamos National Lab., NM (United States); Spence, H.E.; Jorgensen, A.M. [Boston Univ., MA (United States). Center for Space Physics; Fennell, J.F.; Blake, J.B. [Aerospace Corp., Los Angeles, CA (United States); Roelof, E.C. [Johns Hopkins Univ., Laurel, MD (United States). Applied Physics Lab.

1997-12-31T23:59:59.000Z

120

2001 Housing Characteristics Detailed Tables  

U.S. Energy Information Administration (EIA)

2001 Residential Energy Consumption Survey-Housing Characteristics, 2001 Detailed Tables, Energy Information Administration

Note: This page contains sample records for the topic "model results detailed" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Results from Development of Model Specifications for Multifamily Energy Retrofits  

SciTech Connect

Specifications, modeled after CSI MasterFormat, provide the trade contractors and builders with requirements and recommendations on specific building materials, components and industry practices that comply with the expectations and intent of the requirements within the various funding programs associated with a project. The goal is to create a greater level of consistency in execution of energy efficiency retrofits measures across the multiple regions a developer may work. IBACOS and Mercy Housing developed sample model specifications based on a common building construction type that Mercy Housing encounters.

Brozyna, K.

2012-08-01T23:59:59.000Z

122

Linear Models: Useful Tools to Analyze GCM Results  

Science Conference Proceedings (OSTI)

Using a two-level linear, steady state model, we diagnose the 40-day mean response of a GCM to a tropical sea surface temperature (SST) anomaly. The time-mean anomalies produced by the GCM are simulated as linear response to the anomalous ...

C. J. Kok; J. D. Opsteegh; H. M. van den Dool

1987-09-01T23:59:59.000Z

123

Operational Ensemble Cloud Model Forecasts: Some Preliminary Results  

Science Conference Proceedings (OSTI)

From 15 July through 30 September of 2001, an ensemble cloud-scale model was run for the Storm Prediction Center on a daily basis. Each ensemble run consisted of 78 members whose initial conditions were derived from the 20-km Rapid Update Cycle ...

Kimberly L. Elmore; Steven J. Weiss; Peter C. Banacos

2003-10-01T23:59:59.000Z

124

Clean Cities: Clean Cities Financial Opps Details NewsDetail  

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

Financial Opportunities Printable Version Share this resource Send a link to Clean Cities: Clean Cities Financial Opps Details NewsDetail to someone by E-mail Share Clean Cities:...

125

PHEV Parcel Delivery Truck Model - Development and Preliminary Results (Presentation)  

DOE Green Energy (OSTI)

Describes results of a study to determine the impact of drive cycles on the energy- and cost-effectiveness of plug-in hybrid electric delivery vans.

Barnitt, R

2009-10-28T23:59:59.000Z

126

been conducted to analyze the exchanger experimentally (Bose and Parker 1983; Bose et al. 1980, 1982). An analytical study of such heat exchangers, which uses a detailed mathematical model to describe their  

E-Print Network (OSTI)

, 1982). An analytical study of such heat exchangers, which uses a detailed mathematical model-tube heat exchangers. Six 6-in (152-mm) wells were drilled at depths of 53, 60, 70, 80, 90, and 100 ft (16 exchanger and circulation pump, both cooling and heating SPFs would have been higher had a water-to-air unit

Oak Ridge National Laboratory

127

I/O Benchmarking Details  

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

IO Benchmarking Details IO Benchmarking Details These benchmarks are simply the transfer rate for copying some files from an eliza file system to TMPDIR on a batch node. Each...

128

VEHICLE DETAILS AND BATTERY SPECIFICATIONS  

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

Page 1 of 6 VEHICLE DETAILS AND BATTERY SPECIFICATIONS 1 Vehicle Details Base Vehicle: 2013 Chevrolet Volt VIN: 1G1RA6E40DU103929 Propulsion System: Multi-Mode PHEV (EV, Series,...

129

VEHICLE DETAILS AND BATTERY SPECIFICATIONS  

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

Page 1 VEHICLE DETAILS AND BATTERY SPECIFICATIONS 1 Vehicle Details Base Vehicle: 2011 Chevrolet Volt VIN: 1G1RD6E48BU100815 Propulsion System: Multi-Mode PHEV (EV, Series, and...

130

User's guide to HELIOS: a computer program for modeling the optical behavior of reflecting solar concentrators. Part III. Appendices concerning HELIOS-code details  

SciTech Connect

HELIOS is a flexible computer code for evaluating designs for central-receiver, parabolic-dish, and other reflecting solar-energy collector systems; for safety calculations on the threat to personnel and to the facility itself; for determination of how various input parameters alter the power collected; for design trade-offs; and for heliostat evaluations. Input variables include atmospheric transmission effects; reflector shape, surface, and suntracking errors; focusing and alignment strategies; receiver design; placement positions of the tower and mirrors; time-of-day and day-of-year for the calculation. Part III is a series of appendices giving code details for subroutine and function descriptions, how common blocks are used, sample jobstreams, and magnetic tape use within the code.

Vittitoe, C.N.; Biggs, F.

1981-09-01T23:59:59.000Z

131

NIST Image Gallery: Image Details  

Science Conference Proceedings (OSTI)

... Image Gallery : Image Details. 72 DPI Image 150 DPI Image No 300 DPI Version. Title: Frequency Comb, Ultrafast Laser. ...

132

NIST Image Gallery: Image Details  

Science Conference Proceedings (OSTI)

... Image Gallery : Image Details. 72 DPI Image 150 DPI Image No 300 DPI Version. Title: Iron-Based Superconductors. Description ...

133

NIST Image Gallery: Image Details  

Science Conference Proceedings (OSTI)

... Image Gallery : Image Details. 72 DPI Image 150 DPI Image No 300 DPI Version. Title: Space Weather Forecasts. Description ...

134

NIST Image Gallery: Image Details  

Science Conference Proceedings (OSTI)

... Image Gallery : Image Details. 72 DPI Image 150 DPI Image No 300 DPI Version. Title: Organic Solar Power. Description ...

135

Detailed chemical kinetic models for large n-alkanes and iso-alkanes found in conventional and F-T diesel fuels  

SciTech Connect

n-Hexadecane and 2,2,4,4,6,8,8-heptamethylnonane represent the primary reference fuels for diesel that are used to determine cetane number, a measure of the ignition property of diesel fuel. With the development of chemical kinetics models for both primary reference fuels, a new capability is now available to model diesel fuel ignition. Additionally, we have developed chemical kinetic models for a whole series of large n-alkanes and a large iso-alkane to represent these chemical classes in fuel surrogates for conventional and future fuels. These chemical kinetic models are used to predict the effect of the aforementioned fuel components on ignition characteristics under conditions found in internal combustion engines.

Westbrook, C K; Pitz, W J; Mehl, M; Curran, H J

2009-03-09T23:59:59.000Z

136

Application of Boyd’s Periodization and Relaxation Method in a Spectral Atmospheric Limited-Area Model. Part II: Accuracy Analysis and Detailed Study of the Operational Impact  

Science Conference Proceedings (OSTI)

Spectral limited-area models face a particular challenge at their lateral boundaries: the fields need to be made periodic. Boyd proposed a windowing-based method to improve the periodization and relaxation. In a companion paper, the implementation ...

Daan Degrauwe; Steven Caluwaerts; Fabrice Voitus; Rafiq Hamdi; Piet Termonia

2012-10-01T23:59:59.000Z

137

Case Studies Comparing System Advisor Model (SAM) Results to Real Performance Data: Preprint  

SciTech Connect

NREL has completed a series of detailed case studies comparing the simulations of the System Advisor Model (SAM) and measured performance data or published performance expectations. These case studies compare PV measured performance data with simulated performance data using appropriate weather data. The measured data sets were primarily taken from NREL onsite PV systems and weather monitoring stations.

Blair, N.; Dobos, A.; Sather, N.

2012-06-01T23:59:59.000Z

138

Hydrogen-burn survival: preliminary thermal model and test results  

DOE Green Energy (OSTI)

This report documents preliminary Hydrogen Burn Survival (HBS) Program experimental and analytical work conducted through February 1982. The effects of hydrogen deflagrations on safety-related equipment in nuclear power plant containment buildings are considered. Preliminary results from hydrogen deflagration experiments in the Sandia Variable Geometry Experimental System (VGES) are presented and analytical predictions for these tests are compared and discussed. Analytical estimates of component thermal responses to hydrogen deflagrations in the upper and lower compartments of an ice condenser, pressurized water reactor are also presented.

McCulloch, W.H.; Ratzel, A.C.; Kempka, S.N.; Furgal, D.T.; Aragon, J.J.

1982-08-01T23:59:59.000Z

139

SiO2 and Si etching in fluorocarbon plasmas: A detailed surface model coupled with a complete plasma and profile simulator.  

Science Conference Proceedings (OSTI)

A surface model for SiO"2 and Si etching in fluorocarbon plasmas is presented, taking into account polymer deposition. The polymer, the CF"x, and the F surface coverage is calculated, as well as the etching yields and rates. Transition from deposition ...

E. Gogolides; P. Vauvert; Y. Courtin; G. Kokkoris; R. Pelle; A. Boudouvis; G. Turban

1999-05-01T23:59:59.000Z

140

Month-Long 2D Cloud-Resolving Model Simulation and Resultant Statistics of Cloud Systems Over the ARM SGP  

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

Month-Long 2D Cloud-Resolving Model Simulation Month-Long 2D Cloud-Resolving Model Simulation and Resultant Statistics of Cloud Systems Over the ARM SGP X. Wu Department of Geological and Atmospheric Sciences Iowa State University Ames, Iowa X.-Z. Liang Illinois State Water Survey University of Illinois Urbana-Champaign, Illinois Introduction The cloud-resolving model (CRM) has recently emerged as a useful tool to develop improved representations of convections, clouds, and cloud-radiation interactions in general circulation models (GCMs). In particular, the fine spatial resolution allows the CRM to more realistically represent the detailed structure of cloud systems, including cloud geometric and radiative properties. The CRM simulations thus provide unique and comprehensive datasets, based on which more realistic GCM

Note: This page contains sample records for the topic "model results detailed" 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

Methodology for Analyzing the Technical Potential for Energy Performance in the U.S. Commercial Buildings Sector with Detailed Energy Modeling: Preprint  

SciTech Connect

This paper summarizes a methodology for developing quantitative answers to the question, ''How low can energy use go within the commercial buildings sector''? The basic process is to take each building in the 1999 CBECS public use data files and create a baseline building energy model for it as if it were being built new in 2005 with code-minimum energy performance.

Griffith, B.; Crawley, D.

2006-11-01T23:59:59.000Z

142

NIST Image Gallery: Image Details  

Science Conference Proceedings (OSTI)

... Image Gallery : Image Details. 72 DPI Image No 150 DPI Version 300 DPI Image. Title: Ultrafast Laser Speeds Up Quest for Atomic Control. ...

143

NIST Image Gallery: Image Details  

Science Conference Proceedings (OSTI)

... Image Gallery : Image Details. 72 DPI Image 150 DPI Image No 300 DPI Version. Title: House; Trees. Description: *BFRL. Subjects (names): ...

144

NIST Image Gallery: Image Details  

Science Conference Proceedings (OSTI)

... Image Gallery : Image Details. No 72 DPI Version No 150 DPI Version 300 DPI Image. Title: Gold Nano Anchors Put Nanowires in Their Place. ...

145

Reconciling Simulated Moisture Fluxes Resulting from Alternate Hydrologic Model Time Steps and Energy Budget Closure Assumptions  

Science Conference Proceedings (OSTI)

Hydrological model predictions are sensitive to model forcings, input parameters, and the parameterizations of physical processes. Analyses performed for the Variable Infiltration Capacity model show that the resulting moisture fluxes are ...

Ingjerd Haddeland; Dennis P. Lettenmaier; Thomas Skaugen

2006-06-01T23:59:59.000Z

146

Property:Project Details | Open Energy Information  

Open Energy Info (EERE)

Details Details Jump to: navigation, search Property Name Project Details Property Type Text Pages using the property "Project Details" Showing 25 pages using this property. (previous 25) (next 25) M MHK Projects/40MW Lewis project + Aquamarine Power is developing its first commercial 40MW Oyster wave farm off the north-west coast of Lewis in Scotland. The company was granted an exclusive option on the site by UK seabed owner The Crown Estate in May 2011. MHK Projects/ADM 3 + 1/4 scale model MHK Projects/ADM 4 + Shore based PTO test MHK Projects/ADM 5 + Framework 7 program of the European Union MHK Projects/AW Energy EMEC + AW Energy successfully demonstrated a 1:3 scale prototype device at EMEC (European Marine Energy Center) in both calm and rough winter conditions. Bottom wave velocity measurements were taken concurrently using a Doppler device.

147

The combustion chemistry of a fuel tracer: Measured flame speeds and ignition delays and a detailed chemical kinetic model for the oxidation of acetone  

SciTech Connect

Acetone ignition delay and stretch-free laminar flame speed measurements have been carried out and a kinetic model has been developed to simulate these and literature data for acetone and for ketene, which was found to be an important intermediate in its oxidation. The mechanism has been based on one originally devised for dimethyl ether and modified through validation of the hydrogen, carbon monoxide and methane sub-mechanisms. Acetone oxidation in argon was studied behind reflected shock waves in the temperature range 1340-1930 K, at 1 atm and at equivalence ratios of 0.5, 1 and 2; it is also shown that the addition of up to 15% acetone to a stoichiometric n-heptane mixture has no effect on the measured ignition delay times. Flame speeds at 298 K and 1 atm of pure acetone in air were measured in a spherical bomb; a maximum flame speed of {proportional_to}35 cm s{sup -1} at {phi}=1.15 is indicated. (author)

Pichon, S.; Black, G.; Simmie, J.M.; Curran, H.J. [Combustion Chemistry Centre, National University of Ireland, Galway (Ireland); Chaumeix, N.; Yahyaoui, M. [Institut de Combustion Aerothermique Reactivite et Environnement, CNRS, Orleans (France); Donohue, R. [Information Technology, National University of Ireland, Galway (Ireland)

2009-02-15T23:59:59.000Z

148

Sensitivity of PDR Calculations to Microphysical Details  

E-Print Network (OSTI)

Our understanding of physical processes in Photodissociation regions or Photon Dominated Regions (PDRs) largely depends on the ability of spectral synthesis codes to reproduce the observed infrared emission-line spectrum. In this paper, we explore the sensitivity of a single PDR model to microphysical details. Our calculations use the Cloudy spectral synthesis code, recently modified to include a wealth of PDR physical processes. We show how the chemical/thermal structure of a PDR, along with the calculated spectrum, changes when the treatment of physical processes such as grain physics and atomic/molecular rates are varied. We find a significant variation in the intensities of PDR emission lines, depending on different treatments of the grain physics. We also show how different combinations of the cosmic-ray ionization rate, inclusion of grain-atom/ion charge transfer, and the grain size distribution can lead to very similar results for the chemical structure. Additionally, our results show the utility of Cloudy for the spectral modeling of molecular environments.

N. P. Abel; P. A. M. van Hoof; G. Shaw; G. J. Ferland; T. Elwert

2008-08-19T23:59:59.000Z

149

Research experiments detailed design review  

DOE Green Energy (OSTI)

The illustrations for the detailed design review of the heliostats for a solar thermal pilot plant are presented. Also included are the program schedule, meeting agenda, and component design features. (MHR)

Not Available

1976-01-01T23:59:59.000Z

150

Leaching of BTEX from Aged Crude Oil Contaminated Model Soils: Experimental and Modeling Results  

SciTech Connect

It is generally assumed that soil properties such as organic matter content, porosity, and mineral surface area have a significant effect on the bioavailability and leachability of aged petroleum hydrocarbons. In order to test this hypothesis, nine model soils or sorbents (i.e., fine and coarse quartz sand, montmorillonite and kaolinite clay, peat, 60? and 150? silica gel, a loam soil, and non-porous glass beads) were spiked with a crude oil, aged for 27 months in the laboratory, and transferred to glass columns for the performance of continuous flow leaching experiments. The column effluents were periodically sampled for 43 days and analyzed for BTEX. A one-dimensional flow model for predicting the dissolution and dispersion of individual hydrocarbons from a multi-component NAPL such as crude oil was used to fit the leaching data (i.e., the BTEX concentration versus time curves) by adjusting the equilibrium oil-leachate partitioning coefficient (Kol) for each respective hydrocarbon. The Peclet number, which is a measure of dispersion and a required modeling parameter, was measured in separate chloride tracer experiments for each soil column. Results demonstrate that soil properties did not significantly affect the leaching kinetics of BTEX from the columns. Instead, BTEX leaching curves could be successfully fitted with the one-dimensional NAPL dissolution flow model for all sorbents with the exception of montmorillonite clay. The fitting parameter Kol for each hydrocarbon was found to be similar to the Kol values that were independently measured for the same crude oil by Rixey et al. (Journal of Hazardous Materials B, 65: 137-156, 1999). In addition, the fitted Kol values were very similar for BTEX leaching from aged compared to freshly spiked loam soil. These findings indicate that leaching of BTEX in the aged soils that are contaminated with crude oil at the high concentrations commonly found in the environment (i.e., >20,000 mg/kg) was not affected by soil properties or aging but rather was governed by the equilibrium dissolution of these hydrocarbons from the crude oil NAPL that is coating the soil particles.

Huesemann, Michael H.; Hausmann, Tom S.; Fortman, Timothy J.

2005-01-01T23:59:59.000Z

151

LEVEL OF DETAIL MODELS FOR DISMOUNTED INFANTRY  

E-Print Network (OSTI)

Monterey, California #12;Public reporting burden for this collection of information is estimated to average. 0704-0188 1. AGENCY USE ONLY (Leave Blank) 2. REPORT DATE 3. REPORT TYPE AND DATES COVERED 4. TITLE in NPSNET-IV.8.1. Additionally, view volume culling techniques were employed to reduce polygon flow through

Zyda, Michael

152

Radiative effects of a CO/sub 2/ increase: results of a model comparison  

SciTech Connect

A comparison of infrared radiative transfer models is announced. The initial phase is underway, with other phases scheduled through 1984. The results of the ir model comparison will be included in the state-of-the-art report on climate modeling. Although the time scale for completion of the comparison is a few years, significant preliminary results have already been obtained. (PSB)

Luther, F.M.

1982-10-07T23:59:59.000Z

153

Heavy precipitation events in a warmer climate: results from CMIP5 models  

Science Conference Proceedings (OSTI)

In this work the authors investigate possible changes in the distribution of heavy precipitation events under a warmer climate, using the results of a set of 20 climate models taking part in the Coupled Model Intercomparison Project phase 5 effort ...

Enrico Scoccimarro; Silvio Gualdi; Alessio Bellucci; Matteo Zampieri; Antonio Navarra

154

A PDF-Based Model for Boundary Layer Clouds. Part II: Model Results  

Science Conference Proceedings (OSTI)

A new single-column model for the cloudy boundary layer, described in a companion paper, is tested for a variety of regimes. To represent the subgrid-scale variability, the model uses a joint probability density function (PDF) of vertical ...

Jean-Christophe Golaz; Vincent E. Larson; William R. Cotton

2002-12-01T23:59:59.000Z

155

Effect of Blade Torsion on Modeling Results for the Small Wind Research Turbine (SWRT): Preprint  

DOE Green Energy (OSTI)

This paper summarizes modeling results from both the FAST and ADAMS aeroelastic simulators characterizing small wind turbine loads and dynamic behavior.

Corbus, D.; Hansen, A. C.; Minnema, J.

2006-01-01T23:59:59.000Z

156

Advanced Manufacturing Office: NewsDetail  

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

Office: NewsDetail on Twitter Bookmark Advanced Manufacturing Office: NewsDetail on Google Bookmark Advanced Manufacturing Office: NewsDetail on Delicious Rank Advanced...

157

Building Technologies Office: Buildings NewsDetail  

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

NewsDetail on Twitter Bookmark Building Technologies Office: Buildings NewsDetail on Google Bookmark Building Technologies Office: Buildings NewsDetail on Delicious Rank Building...

158

Building Technologies Office: NewsDetail  

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

Office: NewsDetail on Twitter Bookmark Building Technologies Office: NewsDetail on Google Bookmark Building Technologies Office: NewsDetail on Delicious Rank Building...

159

EERE Postdoctoral Research Awards: NewsDetail  

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

NewsDetail on Twitter Bookmark EERE Postdoctoral Research Awards: NewsDetail on Google Bookmark EERE Postdoctoral Research Awards: NewsDetail on Delicious Rank EERE...

160

TURBULENT COMBUSTION MODELING OF COAL:BIOMASS BLENDS IN A SWIRL BURNER I -PRELIMINARY RESULTS  

E-Print Network (OSTI)

TURBULENT COMBUSTION MODELING OF COAL:BIOMASS BLENDS IN A SWIRL BURNER I - PRELIMINARY RESULTS of Mathematics Texas A&M University College Station, TX 77843 ABSTRACT A combustion model using three mixture fractions has been developed for accurate simulation of coal:manure combustion. This model treats coal

Daripa, Prabir

Note: This page contains sample records for the topic "model results detailed" 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

New Details of Ferroelectric Switching  

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

New Details of Ferroelectric Switching New Details of Ferroelectric Switching All of our current information technology relies on devices that process information as binary ones and zeroes. Ferroelectric materials are of special interest to developers of the next generation of such devices because they exhibit polarized electronic states that can represent bits of information. Moreover, these materials retain their polarization states without consuming electrical power, making ferroelectrics the subject of intense study for nonvolatile memory applications in which data is stored even when the power is turned off. One problem, however, is polarization fatigue: after a number of cycles, the switchable polarization begins to taper off, rendering the device unusable. Recently, a team of researchers

162

Electric Power detailed State data  

U.S. Energy Information Administration (EIA) Indexed Site

Detailed State Data Detailed State Data Annual data for 2012 Release Date: November 12, 2013 Next Release Date: November 2014 Revision/Corrections Annual data format 1990 - 2012 Net Generation by State by Type of Producer by Energy Source (EIA-906, EIA-920, and EIA-923)1 XLS 1990 - 2012 Fossil Fuel Consumption for Electricity Generation by Year, Industry Type and State (EIA-906, EIA-920, and EIA-923)2 XLS 1990 - 2011 Existing Nameplate and Net Summer Capacity by Energy Source, Producer Type and State (EIA-860)1, 3 XLS 2011 - 2016 Proposed Nameplate and Net Summer Capacity by Year, Energy Source, and State (EIA-860)1 XLS 1990 - 2011 U.S. Electric Power Industry Estimated Emissions by State (EIA-767, EIA-906, EIA-920, and EIA-923)4 XLS 1990 - 2012 Average Price by State by Provider (EIA-861)5 XLS

163

Cost Benefit Analysis Modeling Tool for Electric vs. ICE Airport Ground Support Equipment – Development and Results  

SciTech Connect

This report documents efforts to develop a computer tool for modeling the economic payback for comparative airport ground support equipment (GSE) that are propelled by either electric motors or gasoline and diesel engines. The types of GSE modeled are pushback tractors, baggage tractors, and belt loaders. The GSE modeling tool includes an emissions module that estimates the amount of tailpipe emissions saved by replacing internal combustion engine GSE with electric GSE. This report contains modeling assumptions, methodology, a user’s manual, and modeling results. The model was developed based on the operations of two airlines at four United States airports.

James Francfort; Kevin Morrow; Dimitri Hochard

2007-02-01T23:59:59.000Z

164

Detailed chemical kinetic oxidation mechanism for a biodiesel surrogate  

DOE Green Energy (OSTI)

A detailed chemical kinetic mechanism has been developed and used to study the oxidation of methyl decanoate, a surrogate for biodiesel fuels. This model has been built by following the rules established by Curran et al. for the oxidation of n-heptane and it includes all the reactions known to be pertinent to both low and high temperatures. Computed results have been compared with methyl decanoate experiments in an engine and oxidation of rapeseed oil methyl esters in a jet stirred reactor. An important feature of this mechanism is its ability to reproduce the early formation of carbon dioxide that is unique to biofuels and due to the presence of the ester group in the reactant. The model also predicts ignition delay times and OH profiles very close to observed values in shock tube experiments fueled by n-decane. These model capabilities indicate that large n-alkanes can be good surrogates for large methyl esters and biodiesel fuels to predict overall reactivity, but some kinetic details, including early CO2 production from biodiesel fuels, can be predicted only by a detailed kinetic mechanism for a true methyl ester fuel. The present methyl decanoate mechanism provides a realistic kinetic tool for simulation of biodiesel fuels.

Herbinet, O; Pitz, W J; Westbrook, C K

2007-09-17T23:59:59.000Z

165

Detailed chemical kinetic oxidation mechanism for a biodiesel surrogate  

DOE Green Energy (OSTI)

A detailed chemical kinetic mechanism has been developed and used to study the oxidation of methyl decanoate, a surrogate for biodiesel fuels. This model has been built by following the rules established by Curran et al. for the oxidation of n-heptane and it includes all the reactions known to be pertinent to both low and high temperatures. Computed results have been compared with methyl decanoate experiments in an engine and oxidation of rapeseed oil methyl esters in a jet stirred reactor. An important feature of this mechanism is its ability to reproduce the early formation of carbon dioxide that is unique to biofuels and due to the presence of the ester group in the reactant. The model also predicts ignition delay times and OH profiles very close to observed values in shock tube experiments fueled by n-decane. These model capabilities indicate that large n-alkanes can be good surrogates for large methyl esters and biodiesel fuels to predict overall reactivity, but some kinetic details, including early CO{sub 2} production from biodiesel fuels, can be predicted only by a detailed kinetic mechanism for a true methyl ester fuel. The present methyl decanoate mechanism provides a realistic kinetic tool for simulation of biodiesel fuels.

Herbinet, O; Pitz, W J; Westbrook, C K

2007-09-20T23:59:59.000Z

166

COMPUTATIONAL FLUID DYNAMICS MODELING OF SCALED HANFORD DOUBLE SHELL TANK MIXING - CFD MODELING SENSITIVITY STUDY RESULTS  

SciTech Connect

The primary purpose of the tank mixing and sampling demonstration program is to mitigate the technical risks associated with the ability of the Hanford tank farm delivery and celtification systems to measure and deliver a uniformly mixed high-level waste (HLW) feed to the Waste Treatment and Immobilization Plant (WTP) Uniform feed to the WTP is a requirement of 24590-WTP-ICD-MG-01-019, ICD-19 - Interface Control Document for Waste Feed, although the exact definition of uniform is evolving in this context. Computational Fluid Dynamics (CFD) modeling has been used to assist in evaluating scaleup issues, study operational parameters, and predict mixing performance at full-scale.

JACKSON VL

2011-08-31T23:59:59.000Z

167

NIST Image Gallery: Image Details  

Science Conference Proceedings (OSTI)

... systems and other framed PV roof modules systems will be used to validate or improve energy prediction models. *BFRL, solar energy, alternative ...

168

NIST Image Gallery: Image Details  

Science Conference Proceedings (OSTI)

... Computer modeling rendition of the proposed carbon-fluorine bond-breaking macrocycle after reaction with a molecule of methyl fluoride (CH3F). ...

169

NIST Image Gallery: Image Details  

Science Conference Proceedings (OSTI)

... workgroup to draw up model regulations for the proper metering and method of sale for vehicles using alternative fuels, including electric vehicles. ...

170

NIST Image Gallery: Image Details  

Science Conference Proceedings (OSTI)

... Tests such as this helped validate computer models of the spread rate and intensity of the fires initiated by jet fuel and fed by the office furnishings ...

171

Results and Comparison from the SAM Linear Fresnel Technology Performance Model: Preprint  

DOE Green Energy (OSTI)

This paper presents the new Linear Fresnel technology performance model in NREL's System Advisor Model. The model predicts the financial and technical performance of direct-steam-generation Linear Fresnel power plants, and can be used to analyze a range of system configurations. This paper presents a brief discussion of the model formulation and motivation, and provides extensive discussion of the model performance and financial results. The Linear Fresnel technology is also compared to other concentrating solar power technologies in both qualitative and quantitative measures. The Linear Fresnel model - developed in conjunction with the Electric Power Research Institute - provides users with the ability to model a variety of solar field layouts, fossil backup configurations, thermal receiver designs, and steam generation conditions. This flexibility aims to encompass current market solutions for the DSG Linear Fresnel technology, which is seeing increasing exposure in fossil plant augmentation and stand-alone power generation applications.

Wagner, M. J.

2012-04-01T23:59:59.000Z

172

Heavy Precipitation Events in a Warmer Climate: Results from CMIP5 Models  

Science Conference Proceedings (OSTI)

In this work, the authors investigate possible changes in the distribution of heavy precipitation events under a warmer climate, using the results of a set of 20 climate models taking part in phase 5 of Coupled Model Intercomparison Project (CMIP5)...

Enrico Scoccimarro; Silvio Gualdi; Alessio Bellucci; Matteo Zampieri; Antonio Navarra

2013-10-01T23:59:59.000Z

173

Impulsively Started Flow in a Submarine Canyon: Comparison of Results from Laboratory and Numerical Models  

Science Conference Proceedings (OSTI)

Intercomparisons have been made of results from laboratory experiments and a numerical model for the flow in the vicinity of an idealized submarine canyon located along an otherwise continuous shelf. Motion in the rotating and continuously ...

Nicolas Pérenne; J. William Lavelle; David C. Smith IV; Don L. Boyer

2001-10-01T23:59:59.000Z

174

Long-term Contracting in a Deregulated Electricity Industry: Simulation Results from a Hydro Management Model  

E-Print Network (OSTI)

The deregulation of electricity industry has introduced long-term contracting as a tool for hedging risk and strategy. A vital consideration for market participants is the relationship between behaviour in the spot market, and decisions taken in the contract market. We have developed a reservoir management model which integrates a Cournot spot market model into a Dual Dynamic Programming framework. Simulations using this model show that the market outcomes depend strongly upon the level of contracting undertaken by both competitors. We develop hypotheses for the dynamics involved, and present results from the simulation model reinforcing these. 1.

Stephen Batstone; Tristram Scott

1998-01-01T23:59:59.000Z

175

NETL: Gasifipedia - Gasification in Detail  

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

Commercial Gasifiers Commercial Gasifiers Types of Gasifiers Although there are various types of gasifers (gasification reactors), different in design and operational characteristics, there are three main gasifier classifications into which most of the commercially available gasifiers fall. These categories are as follows: Fixed-bed gasifiers (also referred as moving-bed gasifiers) Entrained-flow gasifiers Fluidized-bed gasifiers Commercial gasifiers of GE Energy, ConocoPhillips E-Gas(tm) and Shell SCGP are examples of entrained-flow types. Fixed-or moving-bed gasifiers include that of Lurgi and British Gas Lurgi (BGL). Fluidized-bed gasifiers include the catalytic gasifier technology being commercialized by Great Point Energy, the Winkler gasifier, and the KBR transport gasifiers. For more specific information on these gasifiers, follow the links for the bulleted gasifier types above. NOTE: Although specific gasifiers named above are described in detail throughout this website, it is realized that other gasification technologies exist. The gasifiers discussed herein were not preferentially chosen by NETL.

176

SunShot Initiative: NewsDetail  

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

SunShot Initiative: NewsDetail on Twitter Bookmark SunShot Initiative: NewsDetail on Google Bookmark SunShot Initiative: NewsDetail on Delicious Rank SunShot Initiative:...

177

Solid-State Lighting: NewsDetail  

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

Lighting: NewsDetail on Twitter Bookmark Solid-State Lighting: NewsDetail on Google Bookmark Solid-State Lighting: NewsDetail on Delicious Rank Solid-State Lighting:...

178

Fuel Cell Technologies Office: NewsDetail  

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

Office: NewsDetail on Twitter Bookmark Fuel Cell Technologies Office: NewsDetail on Google Bookmark Fuel Cell Technologies Office: NewsDetail on Delicious Rank Fuel Cell...

179

VEHICLE DETAILS AND BATTERY SPECIFICATIONS  

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

voltage limits (see Note 2) at 50% depth of discharge (DOD). 2013 Chevrolet Malibu ECO Hybrid - VIN 3800 Advanced Vehicle Testing - Beginning-of-Test Battery Testing Results...

180

VEHICLE DETAILS AND BATTERY SPECIFICATIONS  

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

voltage limits (see Note 2) at 50% depth of discharge (DOD). 2013 Chevrolet Malibu ECO Hybrid - VIN 7249 Advanced Vehicle Testing - Beginning-of-Test Battery Testing Results...

Note: This page contains sample records for the topic "model results detailed" 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

BISICLES Captures Details of Retreating Antarctic Ice  

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

BISICLES Captures Details of Retreating Antarctic Ice BISICLES Captures Details of Retreating Antarctic Ice March 30, 2013 | Tags: Climate Research, Hopper, Math & Computer Science...

182

Show details for [Energy Storage III: Materials ...  

Science Conference Proceedings (OSTI)

Show details for [ACerS ACerS Arthur L. Friedberg Memorial Lecture. Show details for [ACerS ACerS Cooper Award ...

183

Gearbox Reliability Collaborative Phase 1 and 2: Testing and Modeling Results; Preprint  

DOE Green Energy (OSTI)

The Gearbox Reliability Collaborative (GRC) investigates root causes of wind turbine gearbox premature failures and validates design assumptions that affect gearbox reliability using a combined testing and modeling approach. Knowledge gained from the testing and modeling of the GRC gearboxes builds an understanding of how the selected loads and events translate into internal responses of three-point mounted gearboxes. This paper presents some testing and modeling results of the GRC research during Phase 1 and 2. Non-torque loads from the rotor including shaft bending and thrust, traditionally assumed to be uncoupled with gearbox, affect gear and bearing loads and resulting gearbox responses. Bearing clearance increases bearing loads and causes cyclic loading, which could contribute to a reduced bearing life. Including flexibilities of key drivetrain subcomponents is important in order to reproduce the measured gearbox response during the tests using modeling approaches.

Keller, J.; Guo, Y.; LaCava, W.; Link, H.; McNiff, B.

2012-05-01T23:59:59.000Z

184

Combined Stellar Structure and Atmosphere Models: Exploratory Results for Wolf-Rayet Stars  

E-Print Network (OSTI)

In this paper we present Complete Stellar models (CoStar) for massive stars, which treat the stellar interior and atmosphere, including its wind. Particular emphasis is given to Wolf-Rayet stars. We address the question of the effective temperatures of WNE and WC stars. Our first results show a satisfactory agreement between the CoStar models and the simple temperature correction method applied by Schaller et al. (1992). An analyses of the subphotospheric structure of the WR star models shows the importance of metal opacity. This may be essential for understanding the driving mechanism of Wolf-Rayet winds.

D. Schaerer; A. de Koter; W. Schmutz

1994-10-14T23:59:59.000Z

185

Metal Detectives: New Book Details Titanic Investigation  

Science Conference Proceedings (OSTI)

Metal Detectives: New Book Details Titanic Investigation. For Immediate Release: April 15, 2008. ...

2012-10-02T23:59:59.000Z

186

A hybrid source apportionment model integrating measured data and air quality model results - article no. D07301  

SciTech Connect

The Big Bend Regional Aerosol and Visibility (BRAVO) study was an intensive air quality study designed to understand the causes of haze in Big Bend National Park. Daily speciated fine aerosols were measured from July through October 1999 at 37 sites located mostly in Texas. In support of BRAVO, two chemical transport models (CTMs) were used to apportion particulate sulfate at Big Bend and other sites in Texas to sources in the eastern and western United States, Texas, Mexico, and the Carbon I and II coal-fired power plants, located 225 km southeast of Big Bend in Mexico. Analysis of the CTM source attribution results and comparison to results from receptor models revealed systematic biases. To reduce the multiplicative biases, a hybrid source apportionment model, based on inverse modeling, was developed that adjusted the initial CTM source contributions so the modeled sulfate concentrations optimally fit the measured data, resulting in refined daily source contributions. The method was tested using synthetic data and successfully reduced source attribution biases. The refined sulfate source attribution results reduced the initial eastern U.S. contribution to Big Bend, averaged over the BRAVO study period, from about 40% to about 30%, while Mexico's contribution increased from 24 - 32% about 40%. The contribution from the Carbon facility increased from similar to 14% to over 20%. The increase in Mexico's contribution is consistent with more recent SO{sub 2} emissions estimates that indicate that the BRAVO Mexican SO{sub 2} emissions were underestimated. Source attribution results for other monitoring sites in west Texas were similar to results at Big Bend.

Schichtel, B.A.; Malm, W.C.; Gebhart, K.A.; Barna, M.G.; Knipping, E.M. [Colorado State University, Ft. Collins, CO (United States)

2006-04-04T23:59:59.000Z

187

Results from baseline tests of the SPRE I and comparison with code model predictions  

DOE Green Energy (OSTI)

The Space Power Research Engine (SPRE), a free-piston Stirling engine with linear alternator, is being tested at the NASA Lewis Research Center as part of the Civil Space Technology Initiative (CSTI) as a candidate for high capacity space power. This paper presents results of base-line engine tests at design and off-design operating conditions. The test results are compared with code model predictions.

Cairelli, J.E.; Geng, S.M. [National Aeronautics and Space Administration, Cleveland, OH (United States). Lewis Research Center; Skupinski, R.C. [Sverdrup Technology, Inc., Cleveland, OH (United States). NASA Lewis Research Center Group

1994-09-01T23:59:59.000Z

188

Letter from Commonwealth of Virginia to ENSR International Detailing  

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

of Virginia to ENSR International of Virginia to ENSR International Detailing Responses to Comments made Concerning the Modified Protocol for Downwash Modeling-Mirant Potomac River, LLC Letter from Commonwealth of Virginia to ENSR International Detailing Responses to Comments made Concerning the Modified Protocol for Downwash Modeling-Mirant Potomac River, LLC Docket No. EO-05-01: Letter from Commonwealth of Virginia to ENSR International Detailing Responses to Comments made Concerning the Modified Protocol for Downwash Modeling-Mirant Potomac River, LLC. The comments are addressed for the most part in this letter. As to the electronic media containing the modeling files, an additional copy will be necessary for the public comment process. Letter from Commonwealth of Virginia to ENSR International Detailing

189

Assessment of Energy Removal Impacts on Physical Systems: Hydrodynamic Model Domain Expansion and Refinement, and Online Dissemination of Model Results  

Science Conference Proceedings (OSTI)

In this report we describe the 1) the expansion of the PNNL hydrodynamic model domain to include the continental shelf along the coasts of Washington, Oregon, and Vancouver Island; and 2) the approach and progress in developing the online/Internet disseminations of model results and outreach efforts in support of the Puget Sound Operational Forecast System (PS-OPF). Submittal of this report completes the work on Task 2.1.2, Effects of Physical Systems, Subtask 2.1.2.1, Hydrodynamics, for fiscal year 2010 of the Environmental Effects of Marine and Hydrokinetic Energy project.

Yang, Zhaoqing; Khangaonkar, Tarang; Wang, Taiping

2010-08-01T23:59:59.000Z

190

Detailed stress tensor measurements in a centrifugal compressor vaneless diffuser  

Science Conference Proceedings (OSTI)

Detailed flow measurements have been made in the vaneless diffuser of a large low-speed centrifugal compressor using hot-wire anemometry. The three time mean velocity components and full stress tensor distributions have been determined on eight measurement plans within the diffuser. High levels of Reynolds stress result in the rapid mixing out of the blade wake. Although high levels of turbulent kinetic energy are found in the passage wake, they are not associated with strong Reynolds stresses and hence the passage wake mixes out only slowly. Low-frequency meandering of the wake position is therefore likely to be responsible for the high kinetic energy levels. The anisotropic nature of the turbulence suggests that Reynolds stress turbulence models are required for CFD modeling of diffuser flows.

Pinarbasi, A.; Johnson, M.W. [Univ. of Liverpool (United Kingdom). Dept. of Mechanical Engineering

1996-04-01T23:59:59.000Z

191

VEHICLE DETAILS AND BATTERY SPECIFICATIONS  

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

RR0DF106791 RR0DF106791 Hybrid Propulsion System: Mild Parallel Belt-Alternator Starter (BAS) Number of Electric Machines: 1 Motor: 15 kW (peak), AC induction Battery Specifications Manufacturer: Hitachi Type: Cylindrical Lithium-ion Number of Cells: 32 Nominal Cell Voltage: 3.6 V Nominal System Voltage: 115.2 V Rated Pack Capacity: 4.4 Ah Maximum Cell Charge Voltage 2 : 4.10 V Minimum Cell Discharge Voltage 2 : 3.00 V Thermal Management: Active - Forced air Pack Weight: 65 lb BEGINNING-OF-TEST: BATTERY LABORATORY TEST RESULTS SUMMARY Vehicle Mileage and Testing Date Vehicle Odometer: 5,715 mi Date of Test: January 8, 2013 Static Capacity Test Measured Average Capacity: 3.98 Ah Measured Average Energy Capacity: 460 Wh HPPC Test Pulse Discharge Power @ 50% DOD

192

VEHICLE DETAILS AND BATTERY SPECIFICATIONS  

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

RRXDF106605 RRXDF106605 Hybrid Propulsion System: Mild Parallel Belt-Alternator Starter (BAS) Number of Electric Machines: 1 Motor: 15 kW (peak), AC induction Battery Specifications Manufacturer: Hitachi Type: Cylindrical Lithium-ion Number of Cells: 32 Nominal Cell Voltage: 3.6 V Nominal System Voltage: 115.2 V Rated Pack Capacity: 4.4 Ah Maximum Cell Charge Voltage 2 : 4.10 V Minimum Cell Discharge Voltage 2 : 3.00 V Thermal Management: Active - Forced air Pack Weight: 65 lb BEGINNING-OF-TEST: BATTERY LABORATORY TEST RESULTS SUMMARY Vehicle Mileage and Testing Date Vehicle Odometer: 4,244 mi Date of Test: January 9, 2013 Static Capacity Test Measured Average Capacity: 3.88 Ah Measured Average Energy Capacity: 450 Wh HPPC Test Pulse Discharge Power @ 50% DOD

193

Solar Deployment System (SolarDS) Model: Documentation and Sample Results  

DOE Green Energy (OSTI)

The Solar Deployment System (SolarDS) model is a bottom-up, market penetration model that simulates the potential adoption of photovoltaics (PV) on residential and commercial rooftops in the continental United States through 2030. NREL developed SolarDS to examine the market competitiveness of PV based on regional solar resources, capital costs, electricity prices, utility rate structures, and federal and local incentives. The model uses the projected financial performance of PV systems to simulate PV adoption for building types and regions then aggregates adoption to state and national levels. The main components of SolarDS include a PV performance simulator, a PV annual revenue calculator, a PV financial performance calculator, a PV market share calculator, and a regional aggregator. The model simulates a variety of installed PV capacity for a range of user-specified input parameters. PV market penetration levels from 15 to 193 GW by 2030 were simulated in preliminary model runs. SolarDS results are primarily driven by three model assumptions: (1) future PV cost reductions, (2) the maximum PV market share assumed for systems with given financial performance, and (3) PV financing parameters and policy-driven assumptions, such as the possible future cost of carbon emissions.

Denholm, P.; Drury, E.; Margolis, R.

2009-09-01T23:59:59.000Z

194

Ancillary service details: Voltage control  

SciTech Connect

Voltage control is accomplished by managing reactive power on an alternating-current power system. Reactive power can be produced and absorbed by both generation and transmission equipment. Reactive-power devices differ substantially in the magnitude and speed of response and in their capital costs. System operators, transmission owners, generators, customers, power marketers, and government regulators need to pay close attention to voltage control as they restructure the U.S. electricity industry. Voltage control can affect reliability and commerce in three ways: (1) Voltages must be maintained within an acceptable range for both customer and power-system equipment to function properly. (2) The movement of reactive power consumes transmission resources, which limits the ability to move real power and worsens congestion. (3) The movement of reactive power results in real-power losses. When generators are required to supply excessive amounts of reactive power, their real-power production must be curtailed. These opportunity costs are not currently compensated for in most regions. Current tariffs are based on embedded costs. These embedded-cost tariffs average about $0.51/MWh, equivalent to $1.5 billion annually for the United States as a whole. Although this cost is low when compared with the cost of energy, it still aggregates to a significant amount of money. This report takes a basic look at why the power system requires reactive power (an appendix explains the fundamentals of real and reactive power). The report then examines the various types of generation and transmission resources used to supply reactive power and to control voltage. Finally it discusses how these resources are deployed and paid for in several reliability regions around the country. As the U.S. electricity industry is restructured, the generation, transmission, and system-control equipment and functions that maintain voltages within the appropriate ranges are being deintegrated.

Kirby, B.; Hirst, E.

1997-12-01T23:59:59.000Z

195

Solar Deployment System (SolarDS) Model: Documentation and Sample Results  

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

2 2 September 2009 The Solar Deployment System (SolarDS) Model: Documentation and Sample Results Paul Denholm, Easan Drury, and Robert Margolis National Renewable Energy Laboratory 1617 Cole Boulevard, Golden, Colorado 80401-3393 303-275-3000 * www.nrel.gov NREL is a national laboratory of the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy Operated by the Alliance for Sustainable Energy, LLC Contract No. DE-AC36-08-GO28308 Technical Report NREL/TP-6A2-45832 September 2009 The Solar Deployment System (SolarDS) Model: Documentation and Sample Results Paul Denholm, Easan Drury, and Robert Margolis Prepared under Task No. PVD9.1210 NOTICE This report was prepared as an account of work sponsored by an agency of the United States government.

196

VEHICLE DETAILS, BATTERY DESCRIPTION AND SPECIFICATIONS Vehicle...  

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

Page 1 VEHICLE DETAILS, BATTERY DESCRIPTION AND SPECIFICATIONS Vehicle Details Base Vehicle: 2011 Nissan Leaf VIN: JN1AZ0CP5BT000356 Propulsion System: BEV Electric Machine: 80 kW...

197

GREET 1.5 - transportation fuel-cycle model - Vol. 1 : methodology, development, use, and results.  

DOE Green Energy (OSTI)

This report documents the development and use of the most recent version (Version 1.5) of the Greenhouse Gases, Regulated Emissions, and Energy Use in Transportation (GREET) model. The model, developed in a spreadsheet format, estimates the full fuel-cycle emissions and energy associated with various transportation fuels and advanced vehicle technologies for light-duty vehicles. The model calculates fuel-cycle emissions of five criteria pollutants (volatile organic compounds, carbon monoxide, nitrogen oxides, particulate matter with diameters of 10 micrometers or less, and sulfur oxides) and three greenhouse gases (carbon dioxide, methane, and nitrous oxide). The model also calculates total energy consumption, fossil fuel consumption, and petroleum consumption when various transportation fuels are used. The GREET model includes the following cycles: petroleum to conventional gasoline, reformulated gasoline, conventional diesel, reformulated diesel, liquefied petroleum gas, and electricity via residual oil; natural gas to compressed natural gas, liquefied natural gas, liquefied petroleum gas, methanol, Fischer-Tropsch diesel, dimethyl ether, hydrogen, and electricity; coal to electricity; uranium to electricity; renewable energy (hydropower, solar energy, and wind) to electricity; corn, woody biomass, and herbaceous biomass to ethanol; soybeans to biodiesel; flared gas to methanol, dimethyl ether, and Fischer-Tropsch diesel; and landfill gases to methanol. This report also presents the results of the analysis of fuel-cycle energy use and emissions associated with alternative transportation fuels and advanced vehicle technologies to be applied to passenger cars and light-duty trucks.

Wang, M. Q.

1999-10-06T23:59:59.000Z

198

Chemical kinetic modeling of high pressure propane oxidation and comparison to experimental results  

SciTech Connect

A pressure dependent kinetic mechanism for propane oxidation is developed and compared to experimental data from a high pressure flow reactor. The experiment conditions range from 10--15 atm, 650--800 K, and were performed at a residence time of 200 {micro}s for propane-air mixtures at an equivalence ratio of 0.4. The experimental results include data on negative temperature coefficient (NTC) behavior, where the chemistry describing this phenomena is considered critical in understanding automotive engine knock and cool flame oscillations. Results of the numerical model are compared to a spectrum of stable species profiles sampled from the flow reactor. Rate constants and product channels for the reaction of propyl radicals, hydroperoxy-propyl radicals and important isomers with O{sub 2} were estimated using thermodynamic properties, with multifrequency quantum Kassel Theory for k(E) coupled with modified strong collision analysis for fall-off. Results of the chemical kinetic model show an NTC region over nearly the same temperature regime as observed in the experiments. The model simulates properly the production of many of the major and minor species observed in the experiments. Numerical simulations show many of the key reactions involving propylperoxy radicals are in partial equilibrium at 10--15 atm. This indicates that their relative concentrations are controlled by a combination of thermochemistry and rate of minor reaction channels (bleed reactions) rather than primary reaction rates. This suggests that thermodynamic parameters of the oxygenated species, which govern equilibrium concentrations, are important. The modeling results show propyl radical and hydroperoxy-propyl radicals reaction with O{sub 2} proceeds, primarily, through thermalized adducts, not chemically activated channels.

Koert, D.N. [Wichita State Univ., KS (United States). Mechanical Engineering Dept.; Pitz, W.J. [Lawrence Livermore National Lab., CA (United States); Bozzelli, J.W. [New Jersey Inst. of Tech., Newark, NJ (United States). Chemistry and Chemical Engineering Dept.; Cernansky, N.P. [Drexel Univ., Philadelphia, PA (United States). Dept. of Mechanical Engineering and Mechanics

1995-11-08T23:59:59.000Z

199

COMPARISON OF EXPERIMENTAL RESULTS TO CFD MODELS FOR BLENDING IN A TANK USING DUAL OPPOSING JETS  

Science Conference Proceedings (OSTI)

Research has been completed in a pilot scale, eight foot diameter tank to investigate blending, using a pump with dual opposing jets. The jets re-circulate fluids in the tank to promote blending when fluids are added to the tank. Different jet diameters and different horizontal and vertical orientations of the jets were investigated. In all, eighty five tests were performed both in a tank without internal obstructions and a tank with vertical obstructions similar to a tube bank in a heat exchanger. These obstructions provided scale models of several miles of two inch diameter, serpentine, vertical cooling coils below the liquid surface for a full scale, 1.3 million gallon, liquid radioactive waste storage tank. Two types of tests were performed. One type of test used a tracer fluid, which was homogeneously blended into solution. Data were statistically evaluated to determine blending times for solutions of different density and viscosity, and the blending times were successfully compared to computational fluid dynamics (CFD) models. The other type of test blended solutions of different viscosity. For example, in one test a half tank of water was added to a half tank of a more viscous, concentrated salt solution. In this case, the fluid mechanics of the blending process was noted to significantly change due to stratification of fluids. CFD models for stratification were not investigated. This paper is the fourth in a series of papers resulting from this research (Leishear, et.al. [1- 4]), and this paper documents final test results, statistical analysis of the data, a comparison of experimental results to CFD models, and scale-up of the results to a full scale tank.

Leishear, R.

2011-08-07T23:59:59.000Z

200

MPI-PhT/2003-28 Some results on distinction of Higgs boson models  

E-Print Network (OSTI)

MPI-PhT/2003-28 Some results on distinction of Higgs boson models #3; Jaume Guasch a , Wolfgang on the analysis of the ratio of branching ratios R = BR(H ! b #22; b)=BR(H ! #28; + #28; ) of Higgs boson decays and the e + e Linear Collider at 500 GeV center of mass energy. The search of a Higgs boson is nowadays

Note: This page contains sample records for the topic "model results detailed" 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

Quantifying the Value of Hydropower in the Electric Grid: Modeling Results for Future Scenarios  

Science Conference Proceedings (OSTI)

Work reported in this Technical Report is part of a larger study that is made up of multiple components and intends to utilize and enhance tools that can value hydropower assets in a changing electric grid. The study’s main objective is to develop a methodology to facilitate improved valuation and resource planning for pumped storage and conventional hydropower projects in the future electric transmission grid.This report covers Modeling Results for Future Electricity Market ...

2012-12-31T23:59:59.000Z

202

Results on the search for the standard model Higgs boson at CMS  

Science Conference Proceedings (OSTI)

A summary of the results from searches for the Standard Model Higgs Boson in the CMS experiment at LHC with data collected from proton-proton collisions at {radical}(s) = 7TeV is presented. The Higgs boson is searched in a multiplicity of decay channels using data samples corresponding to integrated luminosities in the range 4.6 - 4.8 fb{sup -1}. The investigated mass range is 110 - 600 GeV. Results are reported for each channel as well as for their combination.

Fabozzi, Francesco [INFN Sezione di Napoli, Complesso Univ. di Monte S. Angelo Via Cintia - 80126 Napoli (Italy) and Universita della Basilicata, Viale dell'Ateneo Lucano 10 - 85100 Potenza (Italy); Collaboration: CMS Collaboration

2012-10-23T23:59:59.000Z

203

Chemical kinetic modeling of high pressure propane oxidation and comparison to experimental results. Revision 1  

SciTech Connect

A pressure dependent kinetic mechanism for propane oxidation is developed and compared to experimental data from a high pressure flow reactor. Experimental conditions range from 10--15 atm, 650--800 K, and a residence time of 198 ms for propane-air mixtures at an equivalence ratio of 0.4. The experimental results clearly indicate a negative temperature coefficient (NTC) behavior. The chemistry describing this phenomena is critical in understanding automotive engine knock and cool flame oscillations. Results of the numerical model are compared to a spectrum of stable species profiles sampled from the flow reactor. Rate constants and product channels for the reaction of propyl radicals, hydroperoxy-propyl radicals and important isomers (radicals) with O{sub 2} were estimated using thermodynamic properties, with multifrequency quantum Kassel Theory for k(E) coupled with modified strong collision analysis for fall-off. Results of the chemical kinetic model show an NTC region over nearly the same temperature regime as observed in the experiments. Sensitivity analysis identified the key reaction steps that control the rate of oxidation in the NTC region. The model reasonably simulates the profiles for many of the major and minor species observed in the experiments.

Koert, D.N. [Wichita State Univ., KS (United States). Mechanical Engineering Dept.; Pitz, W.J. [Lawrence Livermore National Lab., CA (United States); Bozzelli, J.W. [New Jersey Inst. of Tech., Newark, NJ (United States). Chemistry and Chemical Engineering Dept.; Cernansky, N.P. [Drexel Univ., Philadelphia, PA (United States). Dept. of Mechanical Engineering and Mechanics

1996-02-01T23:59:59.000Z

204

Recent results on QCD thermodynamics: lattice QCD versus Hadron Resonance Gas model  

E-Print Network (OSTI)

We present our most recent investigations on the QCD cross-over transition temperatures with 2+1 staggered flavours and one-link stout improvement [JHEP 1009:073, 2010]. We extend our previous two studies [Phys. Lett. B643 (2006) 46, JHEP 0906:088 (2009)] by choosing even finer lattices ($N_t$=16) and we work again with physical quark masses. All these results are confronted with the predictions of the Hadron Resonance Gas model and Chiral Perturbation Theory for temperatures below the transition region. Our results can be reproduced by using the physical spectrum in these analytic calculations. A comparison with the results of the hotQCD collaboration is also discussed.

Szabolcs Borsanyi; Zoltan Fodor; Christian Hoelbling; Sandor D. Katz; Stefan Krieg; Claudia Ratti; Kalman K. Szabo

2010-12-23T23:59:59.000Z

205

Comparison of calculated results from two analytical models with measured data from a heat-exchanger flow test  

SciTech Connect

Predicted results from both a network flow model and a turbulent flow model were compared with measured results from an air flow test on a half-scale model of the auxiliary heat exchanger for a high-temperature gas-cooled reactor. Measurements of both velocity and pressure were made within the heat exchanger shell side flow field. These measurements were compared with calculated results from both a network flow model and a turbulent flow model. Both analytical models predicted early identical results which, except for some minor anomalies, compared favorably with the measured data.

Carosella, D.P.; Pavlics, P.N.

1983-05-01T23:59:59.000Z

206

Fast 2D non-LTE radiative modelling of prominences I. Numerical methods and benchmark results  

E-Print Network (OSTI)

New high-resolution spectropolarimetric observations of solar prominences require improved radiative modelling capabilities in order to take into account both multi-dimensional - at least 2D - geometry and complex atomic models. This makes necessary the use of very fast numerical schemes for the resolution of 2D non-LTE radiative transfer problems considering freestanding and illuminated slabs. The implementation of Gauss-Seidel and successive over-relaxation iterative schemes in 2D, together with a multi-grid algorithm, is thoroughly described in the frame of the short characteristics method for the computation of the formal solution of the radiative transfer equation in cartesian geometry. We propose a new test for multidimensional radiative transfer codes and we also provide original benchmark results for simple 2D multilevel atom cases which should be helpful for the further development of such radiative transfer codes, in general.

L. Leger; L. Chevallier; F. Paletou

2007-03-27T23:59:59.000Z

207

Determination of High-Frequency Current Distribution Using EMTP-Based Transmission Line Models with Resulting Radiated Electromagnetic Fields  

SciTech Connect

Application of BPL technologies to existing overhead high-voltage power lines would benefit greatly from improved simulation tools capable of predicting performance - such as the electromagnetic fields radiated from such lines. Existing EMTP-based frequency-dependent line models are attractive since their parameters are derived from physical design dimensions which are easily obtained. However, to calculate the radiated electromagnetic fields, detailed current distributions need to be determined. This paper presents a method of using EMTP line models to determine the current distribution on the lines, as well as a technique for using these current distributions to determine the radiated electromagnetic fields.

Mork, B; Nelson, R; Kirkendall, B; Stenvig, N

2009-11-30T23:59:59.000Z

208

Structure of Partially Premixed Flames Using Detailed Chemistry Simulations  

E-Print Network (OSTI)

State-of-the-art reacting-flow computations have to compromise either on the detail of chemical reactions or on the dimensionality of the solution, while experiments in flames are limited by the flow accessibility and provide at best a limited number of observables. In the present work, the partially premixed laminar flame structure is examined using a detailed-chemistry, one-dimensional simulation. The computational results are compared to unpublished single-point multiscalar measurements obtained at Sandia National Labs in 2001. The study is focused on axisymmetric laminar partially-premixed methane/air flames with varying premixture strength values of 1.8, 2.2, and 3.17. The combination of computational and experimental results is used to analyze the spatial and scalar flame structure under the overarching concept of flamelets. The computations are based on the Cantera open-source software package developed at CalTech by D. Goodwin, and incorporating the GRI 3.0 chemical kinetic mechanism utilizing 325 chemical reactions and 53 species for methane combustion. Cross-transport effects as well as an optically-thin radiation model are included in the calculations. Radiation changes the flame profiles due to its effect on temperature, and the attendant effects on a number of species. Using the detailed analysis of different reaction rates, the adiabatic and radiative nitric oxide concentrations are compared. The cross-transport effects, i.e. Soret and Dufour, were studied in detail. The Soret term has a small but important effect on the flame structure through a reduction of the hydrogen mass fraction, which changes the conserved scalar values. Based on the flamelet approach and a unique formulation of the conserved scalar, the flame thermochemistry can be analyzed and understood. A number of interesting effects on the flame thermochemistry can be discerned in both experiments and computations when the premixture strength is varied. An increase in premixing results in a counterintuitive decrease in intermediate species such as carbon monoxide and hydrogen, as well as an expected increase in nitric oxide concentrations. Good agreement is found between experiments and calculations in scalar space, while the difference in dimensionality between axisymmetric measurements and opposed jet computations makes comparison in physical space tentative.

Kluzek, Celine D.

2009-08-01T23:59:59.000Z

209

Quantum liquids resulted from the models with four-fermion interaction  

E-Print Network (OSTI)

A (nearly) perfect liquid discovered in the experements with ultrarelativistic heavy ion collisions is investigated by studying the quark ensembles with four-fermion interection as a fundamental theoretical approach. The comparative analysis of several quantum liquid models is performed and it results in the conclusion that the presence of gas---liquid phase transition is their characteristic feature. The problem of instability of the quark droplets of small quark number is discussed and argued to be rooted in the chiral soliton formation. An existence of mixed phase of the vacuum and baryon matter is proposed as a possible reason of the latter stability.

S. V. Molodtsov; G. M. Zinovjev

2013-07-02T23:59:59.000Z

210

Results from Alloy 600 And Alloy 690 Caustic SCC Model Boiler Tests  

SciTech Connect

A versatile model boiler test methodology was developed and used to compare caustic stress corrosion cracking (SCC) of mill annealed Alloy 600 and thermally treated Alloy 690. The model boiler included simulated crevice devices that efficiently and consistently concentrated Na2CO3, resulting in volatilization of CO2 with the steam and concentration of NaOH at the tube surfaces. The test methodology also included variation in tube stress, either produced by the primary to secondary side pressure differential, or by a novel method that reproducibly yields a higher stress condition on the tube. The significant effect of residual stress on tube SCC was also considered. SCC of both Alloy 600 and Alloy 690 were evaluated as a function of temperature and stress. Analytical transmission electron microscopy (ATEM) evaluations of the cracks and the grain boundaries ahead of the cracks were performed, providing insight into the SCC mechanism. This model boiler test methodology may be applicable to a range of bulkwater secondary chemistries that concentrate to produce aggressive crevice environments.

Miller, Frederick D.; Thomas, Larry E.

2009-08-03T23:59:59.000Z

211

Hawaii Solar Integration Study: Solar Modeling Developments and Study Results; Preprint  

Science Conference Proceedings (OSTI)

The Hawaii Solar Integration Study (HSIS) is a follow-up to the Oahu Wind Integration and Transmission Study completed in 2010. HSIS focuses on the impacts of higher penetrations of solar energy on the electrical grid and on other generation. HSIS goes beyond the island of Oahu and investigates Maui as well. The study examines reserve strategies, impacts on thermal unit commitment and dispatch, utilization of energy storage, renewable energy curtailment, and other aspects of grid reliability and operation. For the study, high-frequency (2-second) solar power profiles were generated using a new combined Numerical Weather Prediction model/ stochastic-kinematic cloud model approach, which represents the 'sharp-edge' effects of clouds passing over solar facilities. As part of the validation process, the solar data was evaluated using a variety of analysis techniques including wavelets, power spectral densities, ramp distributions, extreme values, and cross correlations. This paper provides an overview of the study objectives, results of the solar profile validation, and study results.

Orwig, K.; Corbus, D.; Piwko, R.; Schuerger, M.; Matsuura, M.; Roose, L.

2012-12-01T23:59:59.000Z

212

2005 RECS Consumption and Expenditures Detailed Tables  

U.S. Energy Information Administration (EIA)

Detailed Consumption and Expenditures (C&E) tables containing Space Heating, Air-Conditioning, Water Heating, and Appliance residential energy data are now available.

213

High Precision Geophysics & Detailed Structural Exploration ...  

Open Energy Info (EERE)

icon High Precision Geophysics & Detailed Structural Exploration & Slim Well Drilling Geothermal Project Jump to: navigation, search Last modified on July 22, 2011....

214

Examination of Numerical Results from Tangent Linear and Adjoint of Discontinuous Nonlinear Models  

Science Conference Proceedings (OSTI)

The forward model solution and its functional (e.g., the cost function in 4DVAR) are discontinuous with respect to the model's control variables if the model contains discontinuous physical processes that occur during the assimilation window. In ...

S. Zhang; X. Zou; Jon E. Ahlquist

2001-11-01T23:59:59.000Z

215

Validation and Sensitivity Analysis of a New Atmosphere–Soil–Vegetation Model. Part II: Impacts on In-Canopy Latent Heat Flux over a Winter Wheat Field Determined by Detailed Calculation of Canopy Radiation Transmission and Stomatal Resistance  

Science Conference Proceedings (OSTI)

This paper describes the validation and sensitivity analysis of an atmosphere–soil–vegetation model. The model consists of one-dimensional multilayer submodels for the atmosphere, soil, and vegetation and a radiation scheme for the transmission ...

Haruyasu Nagai

2003-03-01T23:59:59.000Z

216

Modeling the Capacity and Emissions Impacts of Reduced Electricity Demand. Part 1. Methodology and Preliminary Results.  

E-Print Network (OSTI)

Modeling the Capacity and Emissions Impacts of Reducedpurposes. Modeling the Capacity and Emissions Impacts ofFigure 2: Comparison of capacity projections from AEO2011

Coughlin, Katie

2013-01-01T23:59:59.000Z

217

The Role of Asia in Mitigating Climate Change: Results from the Asia Modeling Exercise  

SciTech Connect

In 2010, Asia accounted for 60% of global population, 39% of Gross World Product, 44% of global energy consumption and nearly half of the world’s energy system CO2 emissions. Thus, Asia is an important region to consider in any discussion of climate change or climate change mitigation. This paper explores the role of Asia in mitigating climate change, by comparing the results of 23 energy-economy and integrated assessment models. We focus our analysis on seven key areas: base year data, future energy use and emissions absent climate policy, the effect of urban and rural development on future energy use and emissions, the role of technology in emissions mitigation, regional emissions mitigation, and national climate policies

Calvin, Katherine V.; Clarke, Leon E.; Krey, Volker; Blanford, Geoffrey J.; Jiang, Kejun; Kainuma, M.; Kriegler, Elmar; Luderer, Gunnar; Shukla, Priyadarshi R.

2012-12-01T23:59:59.000Z

218

Comparison of Nonlinear Model Results Using Modified Recorded and Synthetic Ground Motions  

Science Conference Proceedings (OSTI)

A study has been performed that compares results of nonlinear model runs using two sets of earthquake ground motion time histories that have been modified to fit the same design response spectra. The time histories include applicable modified recorded earthquake ground motion time histories and synthetic ground motion time histories. The modified recorded earthquake ground motion time histories are modified from time history records that are selected based on consistent magnitude and distance. The synthetic ground motion time histories are generated using appropriate Fourier amplitude spectrums, Arias intensity, and drift correction. All of the time history modification is performed using the same algorithm to fit the design response spectra. The study provides data to demonstrate that properly managed synthetic ground motion time histories are reasonable for use in nonlinear seismic analysis.

Robert E. Spears; J. Kevin Wilkins

2011-11-01T23:59:59.000Z

219

The International Urban Energy Balance Models Comparison Project: First Results from Phase 1  

Science Conference Proceedings (OSTI)

A large number of urban surface energy balance models now exist with different assumptions about the important features of the surface and exchange processes that need to be incorporated. To date, no comparison of these models has been conducted; ...

C. S. B. Grimmond; M. Blackett; M. J. Best; J. Barlow; J-J. Baik; S. E. Belcher; S. I. Bohnenstengel; I. Calmet; F. Chen; A. Dandou; K. Fortuniak; M. L. Gouvea; R. Hamdi; M. Hendry; T. Kawai; Y. Kawamoto; H. Kondo; E. S. Krayenhoff; S-H. Lee; T. Loridan; A. Martilli; V. Masson; S. Miao; K. Oleson; G. Pigeon; A. Porson; Y-H. Ryu; F. Salamanca; L. Shashua-Bar; G-J. Steeneveld; M. Tombrou; J. Voogt; D. Young; N. Zhang

2010-06-01T23:59:59.000Z

220

Initial Results From The Navy Two-Way Interactive Nested Tropical Cyclone Model  

Science Conference Proceedings (OSTI)

A primitive equation, two-way interactive nested tropical cyclone model has been developed by the Naval Environmental Prediction Research Facility for operational use during the 1980 typhoon season. The fine mesh grid of the model operates ...

Edward J. Harrison Jr.

1981-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "model results detailed" 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

Climate–Carbon Cycle Feedback Analysis: Results from the C4MIP Model Intercomparison  

Science Conference Proceedings (OSTI)

Eleven coupled climate–carbon cycle models used a common protocol to study the coupling between climate change and the carbon cycle. The models were forced by historical emissions and the Intergovernmental Panel on Climate Change (IPCC) Special ...

P. Friedlingstein; P. Cox; R. Betts; L. Bopp; W. von Bloh; V. Brovkin; P. Cadule; S. Doney; M. Eby; I. Fung; G. Bala; J. John; C. Jones; F. Joos; T. Kato; M. Kawamiya; W. Knorr; K. Lindsay; H. D. Matthews; T. Raddatz; P. Rayner; C. Reick; E. Roeckner; K.-G. Schnitzler; R. Schnur; K. Strassmann; A. J. Weaver; C. Yoshikawa; N. Zeng

2006-07-01T23:59:59.000Z

222

Thermal Tides in the Atmosphere of Venus: Comparison of Model Results with Observations  

Science Conference Proceedings (OSTI)

A linearized primitive equation (LPE) model is developed to study thermal tides in the atmosphere of Venus. The LPE model describes diurnal and semidiurnal oscillations of a cyclostrophically balanced atmosphere in which zonal velocity varies ...

Judith Burt Pechmann; Andrew P. Ingersoll

1984-11-01T23:59:59.000Z

223

Acoustic emission monitoring for assessment of steel bridge details  

SciTech Connect

Acoustic emission (AE) testing was deployed on details of two large steel Interstate Highway bridges: one cantilever through-truss and one trapezoidal box girder bridge. Quantitative measurements of activity levels at known and suspected crack locations were made by monitoring AE under normal service loads (e.g., live traffic and wind). AE indications were used to direct application of radiography, resulting in identification of a previously unknown flaw, and to inform selection of a retrofit detail.

Kosnik, D. E.; Corr, D. J. [Infrastructure Technology Institute, Northwestern University, Evanston, IL 60208 (United States); Hopwood, T. [Kentucky Transportation Center, University of Kentucky, Lexington, KY 40506 (United States)

2011-06-23T23:59:59.000Z

224

Exact results for parallel-chain kinetic models of biological transport Anatoly B. Kolomeisky  

E-Print Network (OSTI)

-state models. Thus, the application of phenomenological simple chemical kinetic models20­22,25 which provide ``chemical'' approach is based on a kinetic multistate description of the molecular motor transport.17 or conformations leads to the motion of motor proteins. In the simplest chemical kinetic model see Fig. 1 , a motor

225

A Heuristic Model of the Dansgaard-Oeschger Cycles: Description, Results, and Sensitivity Studies: Part I  

Science Conference Proceedings (OSTI)

We present a simple model for studying the D-O cycles of the last glacial period, based on the Dokken Et Al Hypothesis for D-O Cycles. The model is a column model representing the Nordic Seas, and is composed of ocean boxes stacked below a one-...

Hansi A. Singh; David S. Battisti; Cecilia M. Bitz

226

Genetic programming model of solid oxide fuel cell stack: first results  

Science Conference Proceedings (OSTI)

Models that predict performance are important tools in understanding and designing solid oxide fuel cells (SOFCs). Modelling of SOFC stack-based systems is a powerful approach that can provide useful insights into the nonlinear dynamics of ... Keywords: SOFC stack, genetic programming, modelling, nonlinear dynamics, simulation, solid oxide fuel cells

Uday K. Chakraborty

2008-03-01T23:59:59.000Z

227

A Computationally Efficient Approach using Detailed Chemical...  

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

Detailed Chemical Kinetics in Multidimensional Simulation of HCCI and PCCI Engine Combustion Speaker(s): Dan Flowers Date: April 27, 2007 - 12:00pm Location: 90-191 Seminar...

228

Geometry-aware framebuffer level of detail  

Science Conference Proceedings (OSTI)

This paper introduces a framebuffer level of detail algorithm for controlling the pixel workload in an interactive rendering application. Our basic strategy is to evaluate the shading in a low resolution buffer and, in a second rendering pass, resample ...

Lei Yang; Pedro V. Sander; Jason Lawrence

2008-06-01T23:59:59.000Z

229

Property Types, Definitions, and Use Detail  

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

Types, Definitions, and Use Details Types, Definitions, and Use Details The property types listed on pages 1 through 7 are eligible to receive the 1-100 ENERGY STAR score. The Use Details marked with an asterisk are required in order to receive a score. Portfolio Manager now contains more than 80 property types to choose from when setting up your property, in order to best identify the primary use of your property. Although the building types for which the 1-100 ENERGY STAR score is currently available will not change, the expanded list of property types that can be selected will offer users more specific and accurate categorization for comparison. See below for the full list of property types available in Portfolio Manager, along with their definitions and the property use details that you will need to enter.

230

CBECS 1992 - Building Characteristics, Detailed Tables  

U.S. Energy Information Administration (EIA) Indexed Site

Detailed Tables Detailed Tables Detailed Tables Percent of Buildings and Floorspace by Census Region, 1992 Percent of Buildings and Floorspace by Census Region, 1992 The following 70 tables present extensive cross-tabulations of commercial buildings characteristics. These data are from the Buildings Characteristics Survey portion of the 1992 CBECS. The "Quick-Reference Guide," indicates the major topics of each table. Directions for calculating an approximate relative standard error (RSE) for each estimate in the tables are presented in Figure A1, "Use of RSE Row and Column Factor." The Glossary contains the definitions of the terms used in the tables. See the preceding "At A Glance" section for highlights of the detailed tables. Table Organization

231

Results from a workshop on research needs for modeling aquifer thermal energy storage systems  

DOE Green Energy (OSTI)

A workshop an aquifer thermal energy storage (ATES) system modeling was conducted in Seattle, Washington, on November 30 and December 1, 1989 by Pacific Northwest Laboratory (PNL). The goal of the workshop was to develop a list of high-priority research activities that would facilitate the commercial success of ATES. During the workshop, participants reviewed currently available modeling tools for ATES systems and produced a list of significant issues related to modeling ATES systems. Participants assigned a priority to each issue on the list by voting and developed a list of research needs for each of four high-priority research areas; the need for a feasibility study model, the need for engineering design models, the need for aquifer characterization, and the need for an economic model. The workshop participants concluded that ATES commercialization can be accelerated by aggressive development of ATES modeling tools and made specific recommendations for that development. 2 tabs.

Drost, M K

1990-08-01T23:59:59.000Z

232

Detailed Root Cause Analysis of SG Tube ODSCC Indications within ...  

Science Conference Proceedings (OSTI)

Crack Growth Rates of Irradiated Commercial Stainless Steels in BWR and PWR ... Detailed Root Cause Analysis of SG Tube ODSCC Indications within the Tube Sheets of NPP Biblis Unit A .... Radiation Damage in Fe-C-Met Model Alloys ... Stress Corrosion Cracking Behavior near the Fusion Boundary of Dissimilar Weld

233

Assessing Future Changes in the East Asian Summer Monsoon Using CMIP3 Models: Results from the Best Model Ensemble  

Science Conference Proceedings (OSTI)

Future changes in the East Asian summer monsoon (EASM) have been estimated from the six best-performing models in phase 3 of the Coupled Model Intercomparison Project (CMIP3) included in the Fourth Assessment Report (AR4) of the Intergovernmental ...

Kyong-Hwan Seo; Jung Ok

2013-03-01T23:59:59.000Z

234

Statistical Wind Power Forecasting Models: Results for U.S. Wind Farms; Preprint  

DOE Green Energy (OSTI)

Electricity markets in the United States are evolving. Accurate wind power forecasts are beneficial for wind plant operators, utility operators, and utility customers. An accurate forecast makes it possible for grid operators to schedule the economically efficient generation to meet the demand of electrical customers. In the evolving markets, some form of auction is held for various forward markets, such as hour ahead or day ahead. This paper develops several statistical forecasting models that can be useful in hour-ahead markets that have a similar tariff. Although longer-term forecasting relies on numerical weather models, the statistical models used here focus on the short-term forecasts that can be useful in the hour-ahead markets. We investigate the extent to which time-series analysis can improve on simplistic persistence forecasts. This project applied a class of models known as autoregressive moving average (ARMA) models to both wind speed and wind power output.

Milligan, M.; Schwartz, M.; Wan, Y.

2003-05-01T23:59:59.000Z

235

First Detailed Look at RNA Dicer  

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

Detailed Look at RNA Dicer Print Detailed Look at RNA Dicer Print Scientists have gotten their first detailed look at the molecular structure of an enzyme that Nature has been using for eons to help silence unwanted genetic messages. A team of researchers with Berkeley Lab and the University of California, Berkeley, used x-ray crystallography at ALS Beamlines 8.2.1 and 8.2.2 to determine the crystal structure of Dicer, an enzyme that plays a critical role in a process known as RNA interference. The Dicer enzyme is able to snip a double-stranded form of RNA into segments that can attach themselves to genes and block their activity. With this crystal structure, the researchers learned that Dicer serves as a molecular ruler, with a clamp at one end and a cleaver at the other end a set distance away, that produces RNA fragments of an ideal size for gene-silencing.

236

First Detailed Look at RNA Dicer  

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

First Detailed Look at RNA Dicer Print First Detailed Look at RNA Dicer Print Scientists have gotten their first detailed look at the molecular structure of an enzyme that Nature has been using for eons to help silence unwanted genetic messages. A team of researchers with Berkeley Lab and the University of California, Berkeley, used x-ray crystallography at ALS Beamlines 8.2.1 and 8.2.2 to determine the crystal structure of Dicer, an enzyme that plays a critical role in a process known as RNA interference. The Dicer enzyme is able to snip a double-stranded form of RNA into segments that can attach themselves to genes and block their activity. With this crystal structure, the researchers learned that Dicer serves as a molecular ruler, with a clamp at one end and a cleaver at the other end a set distance away, that produces RNA fragments of an ideal size for gene-silencing.

237

The Effects of Assimilation on the Physics of an Ocean Model. Part I: Theoretical Model and Barotropic Results  

Science Conference Proceedings (OSTI)

Although data assimilation is now an established oceanographic technique, little work has been done on the interaction of the assimilation scheme and the physics of the underlying model. The way in which even a simple assimilation scheme (here ...

Rebecca A. Woodgate; Peter D. Killworth

1997-08-01T23:59:59.000Z

238

The Lagrangian View of South Atlantic Interocean Exchange in a Global Ocean Model Compared with Inverse Model Results  

Science Conference Proceedings (OSTI)

Data from a global ocean general circulation model (OCCAM) has been used to investigate the interocean exchange of thermocline and intermediate waters in the South Atlantic Ocean. To resolve the pathways between different ocean basins a ...

J. Donners; S. S. Drijfhout

2004-05-01T23:59:59.000Z

239

Results from a discrete fracture network model of a Hot Dry Rock system  

Science Conference Proceedings (OSTI)

The work described represents a move towards better representations of the natural fracture system. The discrete fracture network model used during the study was the NAPSAC code (Grindrod et al, 1992). The goals of the work were to investigate the application of discrete fracture network models to Hot Dry Rock systems, increase the understanding of the basic thermal extraction process and more specifically the understanding of the Rosemanowes Phase 2B system. The aim in applying the work to the Rosemanowes site was to use the discrete fracture network approach to integrate a diverse set of field measurements into as simple a model as possible.

Lanyon, G.W.; Batchelor, A.S.; Ledingham, P.

1993-01-28T23:59:59.000Z

240

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

Science Conference Proceedings (OSTI)

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

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

2006-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "model results detailed" 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

Multimodel Combination Techniques for Analysis of Hydrological Simulations: Application to Distributed Model Intercomparison Project Results  

Science Conference Proceedings (OSTI)

This paper examines several multimodel combination techniques that are used for streamflow forecasting: the simple model average (SMA), the multimodel superensemble (MMSE), modified multimodel superensemble (M3SE), and the weighted average method ...

Newsha K. Ajami; Qingyun Duan; Xiaogang Gao; Soroosh Sorooshian

2006-08-01T23:59:59.000Z

242

Response of the Middle Atmosphere to CO2 Doubling: Results from the Canadian Middle Atmosphere Model  

Science Conference Proceedings (OSTI)

The Canadian Middle Atmosphere Model (CMAM) has been used to examine the middle atmosphere response to CO2 doubling. The radiative-photochemical response induced by doubling CO2 alone and the response produced by changes in prescribed SSTs are ...

V. I. Fomichev; A. I. Jonsson; J. de Grandpré; S. R. Beagley; C. McLandress; K. Semeniuk; T. G. Shepherd

2007-04-01T23:59:59.000Z

243

Internal Tide Generation at the Continental Shelf Modeled Using a Modal Decomposition: Two-Dimensional Results  

Science Conference Proceedings (OSTI)

Stratified flow over topography is studied, with oceanic applications in mind. A model is developed for a fluid with arbitrary vertical stratification and a free surface, flowing over three-dimensional topography of arbitrary size and steepness, ...

Stephen D. Griffiths; R. H. J. Grimshaw

2007-03-01T23:59:59.000Z

244

Comparison of Results from a Meandering-Plume Model with Measured Atmospheric Tracer Concentration Fluctuations  

Science Conference Proceedings (OSTI)

Measured wind-azimuth data are used in a simple meandering-plume model to predict observed SF6 concentration fluctuations measured downwind of a point source during a range of stability conditions. The meander component of plume diffusion is ...

Holly Peterson; Brian Lamb

1992-06-01T23:59:59.000Z

245

Stability and Variability in a Coupled Ocean–Atmosphere Climate Model: Results of 100-year Simulations  

Science Conference Proceedings (OSTI)

Two 100-year seasonal simulators, one performed with a low resolution atmospheric general circulation model (GCM) coupled to a mixed-layer ocean formulation and the other made with the GCM forced by prescribed ocean conditions, are compared to ...

David D. Houghton; Robert G. Gallimore; Linda M. Keller

1991-06-01T23:59:59.000Z

246

CBECS 1992 - Consumption & Expenditures, Detailed Tables  

U.S. Energy Information Administration (EIA) Indexed Site

Detailed Tables Detailed Tables Detailed Tables Figure on Energy Consumption in Commercial Buildings by Energy Source, 1992 Divider Line The 49 tables present detailed energy consumption and expenditure data for buildings in the commercial sector. This section provides assistance in reading the tables by explaining some of the headings for the data categories. It will also explain the use of row and column factors to compute both the confidence levels of the estimates given in the tables and the statistical significance of differences between the data in two or more categories. The section concludes with a "Quick-Reference Guide" to the statistics in the different tables. Categories of Data in the Tables After Table 3.1, which is a summary table, the tables are grouped into the major fuel tables (Tables 3.2 through 3.13) and the specific fuel tables (Tables 3.14 through 3.29 for electricity, Tables 3.30 through 3.40 for natural gas, Tables 3.41 through 3.45 for fuel oil, and Tables 3.46 through 3.47 for district heat). Table 3.48 presents energy management and DSM data as reported by the building respondent. Table 3.49 presents data on participation in electric utility-sponsored DSM programs as reported by both the building respondent and the electricity supplier.

247

First Detailed Look at RNA Dicer  

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

Detailed Look at RNA Dicer Detailed Look at RNA Dicer First Detailed Look at RNA Dicer Print Wednesday, 25 January 2006 00:00 Scientists have gotten their first detailed look at the molecular structure of an enzyme that Nature has been using for eons to help silence unwanted genetic messages. A team of researchers with Berkeley Lab and the University of California, Berkeley, used x-ray crystallography at ALS Beamlines 8.2.1 and 8.2.2 to determine the crystal structure of Dicer, an enzyme that plays a critical role in a process known as RNA interference. The Dicer enzyme is able to snip a double-stranded form of RNA into segments that can attach themselves to genes and block their activity. With this crystal structure, the researchers learned that Dicer serves as a molecular ruler, with a clamp at one end and a cleaver at the other end a set distance away, that produces RNA fragments of an ideal size for gene-silencing.

248

Spatial Variation of Stratospheric Aerosol Acidity and Model Refractive Index: Implications of Recent Results  

Science Conference Proceedings (OSTI)

Recent experimental results indicate that little or no solid ammonium sulfate is present in background stratospheric aerosols. Other results allow straightforward calculation of sulfuric acid/water droplet properties (acidity, specific gravity, ...

Philip B. Russell; Patrick Hamill

1984-06-01T23:59:59.000Z

249

The Surface Energy Balance at Local and Regional Scales-A Comparison of General Circulation Model Results with Observations  

Science Conference Proceedings (OSTI)

Aspects of the mean monthly energy balance at continental surfaces are examined by appeal to the results of general circulation model (GCM) simulations, climatological maps of surface fluxes, and direct observations. Emphasis is placed on net ...

J. R. Garratt; P. B. Krummel; E. A. Kowalczyk

1993-06-01T23:59:59.000Z

250

An Assessment of Possible Climate Change in the Australian Region Based on an Intercomparison of General Circulation Modeling Results  

Science Conference Proceedings (OSTI)

To assist in estimating likely future climate change in the Australian region, the authors examine the results of four different general circulation modeling experiments run to assess the equilibrium impact of doubling greenhouse gases. The ...

P. H. Whetton; A. B. Pittock; M. R. Haylock; P. J. Rayner

1994-03-01T23:59:59.000Z

251

Operational Implementation of the ISBA Land Surface Scheme in the Canadian Regional Weather Forecast Model. Part I: Warm Season Results  

Science Conference Proceedings (OSTI)

The summertime improvement resulting from the operational implementation of a new surface modeling and assimilation strategy into the Canadian regional weather forecasting system is described in this study. The surface processes over land are ...

Stéphane Bélair; Louis-Philippe Crevier; Jocelyn Mailhot; Bernard Bilodeau; Yves Delage

2003-04-01T23:59:59.000Z

252

Result Summary for the Area 5 Radioactive Waste Management Site Performance Assessment Model Version 4.113  

Science Conference Proceedings (OSTI)

Preliminary results for Version 4.113 of the Nevada National Security Site Area 5 Radioactive Waste Management Site performance assessment model are summarized. Version 4.113 includes the Fiscal Year 2011 inventory estimate.

Shott, G. J.

2012-04-15T23:59:59.000Z

253

Local Mass Conservation and Velocity Splitting in PV-Based Balanced Models. Part II: Numerical Results  

Science Conference Proceedings (OSTI)

The effects of enforcing local mass conservation on the accuracy of non-Hamiltonian potential-vorticity- based balanced models (PBMs) are examined numerically for a set of chaotic shallow-water f-plane vortical flows in a doubly periodic square ...

Ali R. Mohebalhojeh; Michael E. McIntyre

2007-06-01T23:59:59.000Z

254

The Parameterization Of the Planetary Boundary Layer in the UCLA General Circulation Model: Formulation and Results  

Science Conference Proceedings (OSTI)

A planetary boundary layer (PBL) parameterization for general circulation models (GCMs) is presented. It uses a mixed-layer approach in which the PBL is assumed to be capped by discontinuities in the mean profiles. Both clear and cloud-topped ...

Max J. Suarez; Akio Arakawa; David A. Randall

1983-11-01T23:59:59.000Z

255

Tidal Mixing in the Southern Weddell Sea: Results from a Three-Dimensional Model  

Science Conference Proceedings (OSTI)

A three-dimensional primitive equation ocean model is used to study the magnitude and distribution of tidal mixing in the southern Weddell Sea. The contributions of (i) semidiurnal barotropic constituents M2 and S2, (ii) internal tides, and (iii) ...

Adriene F. Pereira; Aike Beckmann; Hartmut H. Hellmer

2002-07-01T23:59:59.000Z

256

2008_Transition_Program_Details_Book_Three.pdf | Department of...  

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

Administration Other Agencies You are here Home 2008TransitionProgramDetailsBookThree.pdf 2008TransitionProgramDetailsBookThree.pdf 2008TransitionProgramDetail...

257

Detailed Monthly and Annual LNG Import Statistics (2004-2012...  

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

Detailed Monthly and Annual LNG Import Statistics (2004-2012) Detailed Monthly and Annual LNG Import Statistics (2004-2012) Detailed Monthly and Annual LNG Import Statistics...

258

Building Technologies Office: Past Events NewsDetail  

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

NewsDetail on Twitter Bookmark Building Technologies Office: Past Events NewsDetail on Google Bookmark Building Technologies Office: Past Events NewsDetail on Delicious Rank...

259

Modeling experimental results of diffusion of alkaline solutions through a compacted bentonite barrier  

SciTech Connect

The interaction between concrete/cement and swelling clay (bentonite) has been modeled in the context of engineered barrier systems for deep geological disposal of high-level radioactive waste. The geochemical transformations observed in laboratory diffusion experiments at 60 and 90 {sup o}C between bentonite and different high-pH solutions (K-Na-OH and Ca(OH){sub 2}-saturated) were reconciled with the reactive transport code CrunchFlow. For K-Na-OH solutions (pH = 13.5 at 25 {sup o}C) partial dissolution of montmorillonite and precipitation of Mg-silicates (talc-like), hydrotalcite and brucite at the interface are predicted at 60 {sup o}C, while at 90 {sup o}C the alteration is wider. Alkaline cations diffused beyond the mineralogical alteration zone by means of exchange with Mg{sup 2+} in the interlayer region of montmorillonite. Very slow reactivity and minor alteration of the clay are predicted in the Ca(OH){sub 2}-bentonite system. The model is a reasonable description of the experiments but also demonstrates the difficulties in modeling processes operating at a small scale under a diffusive regime.

Fernandez, Raul, E-mail: raul.fernandez@ietcc.csic.e [Instituto Eduardo Torroja de Ciencias de la Construccion (CSIC), C/Serrano Galvache, 4, 28033 Madrid (Spain); Institut fuer Geologie, Universitaet Bern, Baltzerstrasse 3, CH-3012 Bern (Switzerland); Cuevas, Jaime [Dpto. Geologia y Geoquimica, Facultad de Ciencias, Universidad Autonoma de Madrid, Campus Cantoblanco, 28049 Madrid (Spain); Maeder, Urs K. [Institut fuer Geologie, Universitaet Bern, Baltzerstrasse 3, CH-3012 Bern (Switzerland)

2010-08-15T23:59:59.000Z

260

Details of U.S. Climate Zones:  

U.S. Energy Information Administration (EIA) Indexed Site

Details of U.S. Climate Zones Details of U.S. Climate Zones Details of U.S. Climate Zones: The CBECS climate zones are groups of climate divisions, as defined by the National Oceanic and Atmospheric Administration (NOAA), which are regions within a state that are as climatically homogeneous as possible. Each NOAA climate division is placed into one of five CBECS climate zones based on its 30-year average heating degree-days (HDD) and cooling degree-days (CDD) for the period 1971 through 2000. (These climate zones have been updated for the 2003 CBECS. All previous CBECS used averages for the 45-year period from 1931 through 1975.) A HDD is a measure of how cold a location was over a period of time, relative to a base temperature (in CBECS, 65 degrees Fahrenheit). The heating degree-day is the difference between that day's average temperature and 65 degrees if the daily average is less than 65; it is zero if the daily average temperature is greater than or equal to 65. For example, if the average temperature for a given day is 40 degrees, then the heating degree-days for that single day equal 25. Heating degree-days for a year are the sum of the daily heating degree-days that year.

Note: This page contains sample records for the topic "model results detailed" 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

Baca geothermal demonstration project. Power plant detail design document  

DOE Green Energy (OSTI)

This Baca Geothermal Demonstration Power Plant document presents the design criteria and detail design for power plant equipment and systems, as well as discussing the rationale used to arrive at the design. Where applicable, results of in-house evaluations of alternatives are presented.

Not Available

1981-02-01T23:59:59.000Z

262

External reflectors for large solar collector arrays, simulation model and experimental results  

SciTech Connect

A model for the calculation of incident solar radiation from flat-and CPC-shaped external reflectors onto flat plate solar collector arrays has been developed. Assuming an infinite length of the collector/reflector rows, the basic calculations of incident radiation in the collector plane from the reflector become very simple. The direct radiation from the sun is projected into a vertical plane perpendicular to the collector and reflector plane. The incident radiation onto the collector, including corrections for shadowing and lost radiation above the collector, can then be calculated using 2-D geometry. For very short collector/reflector rows a 3-D model is given for correction for the loss of specular radiation in the east west direction. The diffuse radiation is assumed to be isotropic. The diffuse radiation in the collector plane is calculated using view factors. CPC-shaped reflectors can be treated with the same models by introducing an equivalent flat reflector. The incidence angle for the solar radiation from the reflector onto the collector is in most cases higher than the incidence angle for the radiation directly from the sun. Therefore the incidence angle characteristics of the collector glazing and absorber become more important in this application. Equations are given for the incidence angles for diffuse and beam radiation. An annual performance increase of over 30%, 100-120 kW h/m[sup 2], has been measured for aged (four operating seasons) flat reflectors in the Swedish climate. With a CPC-shaped reflector and new reflector materials, a performance increase of up to 170 kW h/m[sup 2] is not unrealistic. This means that the collector and ground area requirement can be reduced by more than 30% for a given load.

Perers, B.; Karlsson, B. (Vattenfall Utveckling, Aelvkarleby (Sweden))

1993-11-01T23:59:59.000Z

263

Effects of rock properties on explosive source modeling: Preliminary results. Los Alamos Source Region Project  

SciTech Connect

The purpose of this study was to investigate possible reasons for unexpectedly low ground motion measurements obtained during some events at the Nevada Test Site. Of particular interest were the unexpected low results obtained for the Mission Cyber event which was the first test conducted in the P-tunnel complex.

Dick, R.D.; Fourney, W.L. [Maryland Univ., College Park, MD (United States). Dept. of Mechanical Engineering

1992-09-01T23:59:59.000Z

264

2H2A Hydrogen Delivery Infrastructure Analysis Models and Conventional Pathway Options Analysis Results - Interim Report  

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

H2A Hydrogen Delivery Infrastructure Analysis Models and H2A Hydrogen Delivery Infrastructure Analysis Models and Conventional Pathway Options Analysis Results DE-FG36-05GO15032 Interim Report Nexant, Inc., Air Liquide, Argonne National Laboratory, Chevron Technology Venture, Gas Technology Institute, National Renewable Energy Laboratory, Pacific Northwest National Laboratory, and TIAX LLC May 2008 Contents Section Page Executive Summary ................................................................................................................... 1-9 Delivery Options ...................................................................................................................... 1-9 Evaluation of Options 2 and 3 ................................................................................................. 1-9

265

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

SciTech Connect

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

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

2013-03-01T23:59:59.000Z

266

Reactive Power Laboratory: Synchronous Condenser Testing&Modeling Results - Interim Report  

Science Conference Proceedings (OSTI)

The subject report documents the work carried out by Oak Ridge National Laboratory (ORNL) during months 5-7 (May-July 2005) of a multi-year research project. The project has the overall goal of developing methods of incorporating distributed energy (DE) that can produce reactive power locally and for injecting into the distribution system. The objective for this new type of DE is to be able to provide voltage regulation and dynamic reactive power reserves without the use of extensive communication and control systems. The work performed over this three-month period focused on four aspects of the overall objective: (1) characterization of a 250HP (about 300KVAr) synchronous condenser (SC) via test runs at the ORNL Reactive Power Laboratory; (2) development of a data acquisition scheme for collecting the necessary voltage, current and power readings at the synchronous condenser and on the distribution system; (3) development of algorithms for analyzing raw test data from the various test runs; and (4) validation of a steady-state model for the synchronous condenser via the use of a commercial software package to study its effects on the ORNL 13.8/2.4kV distribution network.

Henry, SD

2005-09-27T23:59:59.000Z

267

Uncertainty and sensitivity analysis of early exposure results with the MACCS Reactor Accident Consequence Model  

Science Conference Proceedings (OSTI)

Uncertainty and sensitivity analysis techniques based on Latin hypercube sampling, partial correlation analysis and stepwise regression analysis are used in an investigation with the MACCS model of the early health effects associated with a severe accident at a nuclear power station. The primary purpose of this study is to provide guidance on the variables to be considered in future review work to reduce the uncertainty in the important variables used in the calculation of reactor accident consequences. The effects of 34 imprecisely known input variables on the following reactor accident consequences are studied: number of early fatalities, number of cases of prodromal vomiting, population dose within 10 mi of the reactor, population dose within 1000 mi of the reactor, individual early fatality probability within 1 mi of the reactor, and maximum early fatality distance. When the predicted variables are considered collectively, the following input variables were found to be the dominant contributors to uncertainty: scaling factor for horizontal dispersion, dry deposition velocity, inhalation protection factor for nonevacuees, groundshine shielding factor for nonevacuees, early fatality hazard function alpha value for bone marrow exposure, and scaling factor for vertical dispersion.

Helton, J.C. [Arizona State Univ., Tempe, AZ (United States); Johnson, J.D. [GRAM, Inc., Albuquerque, NM (United States); McKay, M.D. [Los Alamos National Lab., NM (United States); Shiver, A.W.; Sprung, J.L. [Sandia National Labs., Albuquerque, NM (United States)

1995-01-01T23:59:59.000Z

268

A Comparison of TWP-ICE Observational Data with Cloud-Resolving Model Results  

SciTech Connect

Observations made during the TWP-ICE campaign are used to drive and evaluate thirteen cloud-resolving model simulations with periodic lateral boundary conditions. The simulations employ 2D and 3D dynamics, one- and two-moment microphysics, several variations on large-scale forcing, and the use of observationally derived aerosol properties to prognose droplet numbers. When domain means are averaged over a 6-day active monsoon period, all simulations reproduce observed surface precipitation rate but not its structural distribution. Simulated fractional areas covered by convective and stratiform rain are uncorrelated with one another, and are both variably overpredicted by up to a factor of {approx}2. Stratiform area fractions are strongly anticorrelated with outgoing longwave radiation (OLR) but are negligibly correlated with ice water path (IWP), indicating that ice spatial distribution controls OLR more than mean IWP. Overpredictions of OLR tend to be accompanied by underpredictions of reflected shortwave radiation (RSR). When there are two simulations differing only in microphysics scheme or large-scale forcing, the one with smaller stratiform area tends to exhibit greater OLR and lesser RSR by similar amounts. After {approx}10 days, simulations reach a suppressed monsoon period with a wide range of mean precipitable water vapor, attributable in part to varying overprediction of cloud-modulated radiative flux divergence compared with observationally derived values. Differences across the simulation ensemble arise from multiple sources, including dynamics, microphysics, and radiation treatments. Close agreement of spatial and temporal averages with observations may not be expected, but the wide spreads of predicted stratiform fraction and anticorrelated OLR indicate a need for more rigorous observation-based evaluation of the underlying micro- and macrophysical properties of convective and stratiform structures.

Fridlind, A. M.; Ackerman, Andrew; Chaboureau, Jean-Pierre; Fan, Jiwen; Grabowski, Wojciech W.; Hill, A.; Jones, T. R.; Khaiyer, M. M.; Liu, G.; Minnis, Patrick; Morrison, H.; Nguyen, L.; Park, S.; Petch, Jon C.; Pinty, Jean-Pierre; Schumacher, Courtney; Shipway, Ben; Varble, A. C.; Wu, Xiaoqing; Xie, Shaocheng; Zhang, Minghua

2012-03-13T23:59:59.000Z

269

Uncertainty and sensitivity analysis of food pathway results with the MACCS Reactor Accident Consequence Model  

Science Conference Proceedings (OSTI)

Uncertainty and sensitivity analysis techniques based on Latin hypercube sampling, partial correlation analysis and stepwise regression analysis are used in an investigation with the MACCS model of the food pathways associated with a severe accident at a nuclear power station. The primary purpose of this study is to provide guidance on the variables to be considered in future review work to reduce the uncertainty in the important variables used in the calculation of reactor accident consequences. The effects of 87 imprecisely-known input variables on the following reactor accident consequences are studied: crop growing season dose, crop long-term dose, milk growing season dose, total food pathways dose, total ingestion pathways dose, total long-term pathways dose, area dependent cost, crop disposal cost, milk disposal cost, condemnation area, crop disposal area and milk disposal area. When the predicted variables are considered collectively, the following input variables were found to be the dominant contributors to uncertainty: fraction of cesium deposition on grain fields that is retained on plant surfaces and transferred directly to grain, maximum allowable ground concentrations of Cs-137 and Sr-90 for production of crops, ground concentrations of Cs-134, Cs-137 and I-131 at which the disposal of milk will be initiated due to accidents that occur during the growing season, ground concentrations of Cs-134, I-131 and Sr-90 at which the disposal of crops will be initiated due to accidents that occur during the growing season, rate of depletion of Cs-137 and Sr-90 from the root zone, transfer of Sr-90 from soil to legumes, transfer of Cs-137 from soil to pasture, transfer of cesium from animal feed to meat, and the transfer of cesium, iodine and strontium from animal feed to milk.

Helton, J.C. [Arizona State Univ., Tempe, AZ (United States); Johnson, J.D.; Rollstin, J.A. [GRAM, Inc., Albuquerque, NM (United States); Shiver, A.W.; Sprung, J.L. [Sandia National Labs., Albuquerque, NM (United States)

1995-01-01T23:59:59.000Z

270

Uncertainty and sensitivity analysis of chronic exposure results with the MACCS reactor accident consequence model  

Science Conference Proceedings (OSTI)

Uncertainty and sensitivity analysis techniques based on Latin hypercube sampling, partial correlation analysis and stepwise regression analysis are used in an investigation with the MACCS model of the chronic exposure pathways associated with a severe accident at a nuclear power station. The primary purpose of this study is to provide guidance on the variables to be considered in future review work to reduce the uncertainty in the important variables used in the calculation of reactor accident consequences. The effects of 75 imprecisely known input variables on the following reactor accident consequences are studied: crop growing season dose, crop long-term dose, water ingestion dose, milk growing season dose, long-term groundshine dose, long-term inhalation dose, total food pathways dose, total ingestion pathways dose, total long-term pathways dose, total latent cancer fatalities, area-dependent cost, crop disposal cost, milk disposal cost, population-dependent cost, total economic cost, condemnation area, condemnation population, crop disposal area and milk disposal area. When the predicted variables are considered collectively, the following input variables were found to be the dominant contributors to uncertainty: dry deposition velocity, transfer of cesium from animal feed to milk, transfer of cesium from animal feed to meat, ground concentration of Cs-134 at which the disposal of milk products will be initiated, transfer of Sr-90 from soil to legumes, maximum allowable ground concentration of Sr-90 for production of crops, fraction of cesium entering surface water that is consumed in drinking water, groundshine shielding factor, scale factor defining resuspension, dose reduction associated with decontamination, and ground concentration of 1-131 at which disposal of crops will be initiated due to accidents that occur during the growing season.

Helton, J.C. [Arizona State Univ., Tempe, AZ (United States); Johnson, J.D.; Rollstin, J.A. [Gram, Inc., Albuquerque, NM (United States); Shiver, A.W.; Sprung, J.L. [Sandia National Labs., Albuquerque, NM (United States)

1995-01-01T23:59:59.000Z

271

Drop Test Results for the Combustion Engineering Model No. ABB-2901 Fuel Pellet Package  

SciTech Connect

The U.S. Nuclear Regulatory Commission (USNRC) contracted with the Packaging Review Group (PRG) at Lawrence Livermore National Laboratory (LLNL) to conduct a single, 30-ft shallow-angle drop test on the Combustion Engineering ABB-2901 drum-type shipping package. The purpose of the test was to determine if bolted-ring drum closures could fail during shallow-angle drops. The PRG at LLNL planned the test, and Defense Technologies Engineering Division (DTED) personnel from LLNL's Site-300 Test Group executed the plan. The test was conducted in November 2001 using the drop-tower facility at LLNL's Site 300. Two representatives from Westinghouse Electric Company in Columbia, South Carolina (WEC-SC); two USNRC staff members; and three PRG members from LLNL witnessed the preliminary test runs and the final test. The single test clearly demonstrated the vulnerability of the bolted-ring drum closure to shallow-angle drops-the test package's drum closure was easily and totally separated from the drum package. The results of the preliminary test runs and the 30-ft shallow-angle drop test offer valuable qualitative understandings of the shallow-angle impact.

Hafner, R S; Mok, G C; Hagler, L G

2004-04-23T23:59:59.000Z

272

Electric Utility Sales and Revenue - EIA-826 detailed data file  

U.S. Energy Information Administration (EIA) Indexed Site

Form EIA-826 detailed data Form EIA-826 detailed data The Form EIA-826 "Monthly Electric Utility Sales and Revenue Report with State Distributions" collects retail sales of electricity and associated revenue, each month, from a statistically chosen sample of electric utilities in the United States. The respondents to the Form EIA-826 are chosen from the Form EIA-861, "Annual Electric Utility Report." Methodology is based on the "Model-Based Sampling, Inference and Imputation." In 2003, EIA revised the survey to separate the transportation sales and reassign the other activities to the commercial and industrial sectors as appropriate. The "other" sector activities included public street and highway lighting, sales to public authorities, sales to railroads and railways, interdepartmental sales, and agricultural irrigations.

273

Direct numerical simulation of temporally evolving luminous jet flames with detailed fuel and soot chemistry  

Science Conference Proceedings (OSTI)

Direct numerical simulations of 2D temporally-evolving luminous turbulent ethylene-air jet diffusion flames are performed using a high-order compressible Navier-Stokes solver. The simulations use a reduced mechanism derived from a detailed ethylene-air chemical kinetic mechanism that includes the reaction pathways for the formation of polycyclic aromatic hydrocarbons. The gas-phase chemistry is coupled with a detailed soot particle model based on the method of moments with interpolative closure that accounts for soot nucleation, coagulation, surface growth through HACA mechanism, and oxidation. Radiative heat transfer of CO{sub 2}, H{sub 2}O, and soot is treated by solving the radiative transfer equation using the discrete transfer method. This work presents preliminary results of radiation effects on soot dynamics at the tip of a jet diffusion flame with a particular focus on soot formation/oxidation.

Sankaran, Ramanan [ORNL

2011-01-01T23:59:59.000Z

274

ON THE DYNAMICS OF THE SOLAR CORONA: FIRST RESULTS OBTAINED WITH A NEW 3D MHD MODEL  

E-Print Network (OSTI)

; CWENO. 1. MOTIVATION For many decades space scientists have been at- tracted to the solar wind and its1 ON THE DYNAMICS OF THE SOLAR CORONA: FIRST RESULTS OBTAINED WITH A NEW 3D MHD MODEL J. Kleimann 1) is applied to the problem of the dynamics of the solar corona. First, we present the basic system

Grauer, Rainer

275

Vista at CDF: Results of a model-independent search for new physics in 927 pb**-1 at CDF  

SciTech Connect

A global, model-independent search for high-pT exotic phenomena is presented using 927 pb{sup -1} of CDF II data. The search algorithms employed in this analysis are Vista and Sleuth. These proceedings focus on Vista, including a description of the method and a summary of results.

Choudalakis, Georgios; /MIT, LNS

2007-10-01T23:59:59.000Z

276

2007 Solar Decathlon Detailed Event Schedule  

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

DETAILED EVENT SCHEDULE DETAILED EVENT SCHEDULE Last updated on September 14, 2007 Note: This schedule is subject to change at any time. 12:00 AM 12:30 AM 1:00 AM 1:30 AM 2:00 AM 2:30 AM 3:00 AM 3:30 AM 4:00 AM 4:30 AM 5:00 AM 5:30 AM 6:00 AM 6:30 AM 7:00 AM 7:30 AM 8:00 AM 8:30 AM 9:00 AM 9:30 AM 10:00 AM 10:30 AM 11:00 AM 11:30 AM 12:00 PM 12:30 PM 1:00 PM 1:30 PM 2:00 PM 2:30 PM 3:00 PM 3:30 PM 4:00 PM 4:30 PM 5:00 PM 5:30 PM 6:00 PM 6:30 PM 7:00 PM 7:30 PM 8:00 PM 8:30 PM 9:00 PM 9:30 PM 10:00 PM 10:30 PM 11:00 PM 11:30 PM 12:00 AM 12:30 AM 1:00 AM 1:30 AM 2:00 AM 2:30 AM 3:00 AM 3:30 AM 4:00 AM 4:30 AM 5:00 AM 5:30 AM 6:00 AM 6:30 AM 7:00 AM 7:30 AM 8:00 AM 8:30 AM 9:00 AM 9:30 AM 10:00 AM 10:30 AM 11:00 AM 11:30 AM 12:00 PM 12:30 PM 1:00 PM 1:30 PM 2:00 PM 2:30 PM 3:00 PM 3:30 PM 4:00 PM 4:30 PM 5:00 PM 5:30 PM 6:00 PM 6:30 PM 7:00 PM 7:30 PM 8:00

277

graphicsQC-package Quality Control for Graphics Description Details  

E-Print Network (OSTI)

Description The package provides functions to generate graphics files, compare them with “model” files, and report the results. License GPL-2

Stephen Gardiner; Paul Murrell; Maintainer Paul Murrell; Stephen Gardiner

2009-01-01T23:59:59.000Z

278

Segment-Based Recognition on the PhoneBook Task: Initial Results and Observations on Duration Modeling  

E-Print Network (OSTI)

This paper describes preliminary recognition experiments on PhoneBook [1], a corpus of isolated, telephone-bandwidth, read words from a large (almost 8,000-word) vocabulary. We have chosen this corpus as a testbed for experiments on the language model-independent parts of a segment-based recognizer. We present results showing that a segment-based recognizer performs well on this task, and that a simple Gaussian mixture phone duration model significantly reduces the error rate. We compare context-independent, stress-dependent, and word position-dependent duration models and obtain relative error rate reductions of up to 12% on the test set. Finally, we make some observations regarding the effects of stress and word position in this isolated-word task and discuss our plans for further research using PhoneBook. 1.

Karen Livescu; James Glass

2001-01-01T23:59:59.000Z

279

2008_Transition_Budget_Details_Book_Four.pdf | Department of...  

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

Administration Other Agencies You are here Home 2008TransitionBudgetDetailsBookFour.pdf 2008TransitionBudgetDetailsBookFour.pdf 2008TransitionBudgetDetailsBo...

280

High Performance Windows Volume Purchase: NewsDetail  

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

NewsDetail to someone by E-mail Share High Performance Windows Volume Purchase: NewsDetail on Facebook Tweet about High Performance Windows Volume Purchase: NewsDetail on Twitter...

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they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
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281

Comparison of entrainment rates from a tank experiment with results using the one-dimensional turbulence model.  

Science Conference Proceedings (OSTI)

Recent work suggests that cloud effects remain one of the largest sources of uncertainty in model-based estimates of climate sensitivity. In particular, the entrainment rate in stratocumulus-topped mixed layers needs better models. More than thirty years ago a clever laboratory experiment was conducted by McEwan and Paltridge to examine an analog of the entrainment process at the top of stratiform clouds. Sayler and Breidenthal extended this pioneering work and determined the effect of the Richardson number on the dimensionless entrainment rate. The experiments gave hints that the interaction between molecular effects and the one-sided turbulence seems to be crucial for understanding entrainment. From the numerical point of view large-eddy simulation (LES) does not allow explicitly resolving all the fine scale processes at the entrainment interface. Direct numerical simulation (DNS) is limited due to the Reynolds number and is not the tool of choice for parameter studies. Therefore it is useful to investigate new modeling strategies, such as stochastic turbulence models which allow sufficient resolution at least in one dimension while having acceptable run times. We will present results of the One-Dimensional Turbulence stochastic simulation model applied to the experimental setup of Sayler and Breidenthal. The results on radiatively induced entrainment follow quite well the scaling of the entrainment rate with the Richardson number that was experimentally found for a set of trials. Moreover, we investigate the influence of molecular effects, the fluids optical properties, and the artifact of parasitic turbulence experimentally observed in the laminar layer. In the simulations the parameters are varied systematically for even larger ranges than in the experiment. Based on the obtained results a more complex parameterization of the entrainment rate than currently discussed in the literature seems to be necessary.

Kerstein, Alan R.; Sayler, B. J. (Black Hills State University, Spearfish, SD); Wunsch, S. (Johns Hopkins University, Laurel, MD); Schmidt, H. (BTU Cottbus, Siemens-Halske-Ring 14, 03046 Cottbus, Germany); Nedelec, R. (Ecole Centrale Marseille, Technopole de Chateau-Gombert, 13451 Marseille, France)

2010-05-01T23:59:59.000Z

282

Methods for detailed energy data collection of miscellaneous and electronic  

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

Methods for detailed energy data collection of miscellaneous and electronic Methods for detailed energy data collection of miscellaneous and electronic loads in a commercial office building Title Methods for detailed energy data collection of miscellaneous and electronic loads in a commercial office building Publication Type Journal Article Year of Publication 2013 Authors Lanzisera, Steven, Stephen Dawson-Haggerty, Iris H. Y. Cheung, Jay Taneja, David Culler, and Richard E. Brown Journal Building and Environment Volume 65 Start Page 170 Pagination 170 - 177 Date Published 7/2013 ISSN 03601323 Keywords benchmarking, field study, MELs, office buildings, Plug-loads Abstract Miscellaneous and electronic loads (MELs) consume about 20% of the primary energy used in U.S. buildings, and this share is projected to increase for the foreseeable future. Our understanding, however, of which devices are most responsible for this energy use is still rudimentary due to the difficulty and expense of performing detailed studies on MELs and their energy use. In order to better understand the energy use of MELs and the design of MELs field metering studies, we conducted a year-long study of MELs in an 89,500 sq. ft. (8310 m2) office building. We present insights obtained from this study using 455 wireless plug-load power meters including the study design process, the tools needed for success, and key other methodology issues. Our study allowed us to quantify, for the study buildings, how many devices we needed to inventory and meter as well as for how long we needed to collect meter data. We find that the study design of earlier work would not have yielded accurate results in our study building. This paper presents these findings along with a brief summary of the energy related results.

283

Offshore Code Comparison Collaboration within IEA Wind Task 23: Phase IV Results Regarding Floating Wind Turbine Modeling; Preprint  

SciTech Connect

Offshore wind turbines are designed and analyzed using comprehensive simulation codes that account for the coupled dynamics of the wind inflow, aerodynamics, elasticity, and controls of the turbine, along with the incident waves, sea current, hydrodynamics, and foundation dynamics of the support structure. This paper describes the latest findings of the code-to-code verification activities of the Offshore Code Comparison Collaboration, which operates under Subtask 2 of the International Energy Agency Wind Task 23. In the latest phase of the project, participants used an assortment of codes to model the coupled dynamic response of a 5-MW wind turbine installed on a floating spar buoy in 320 m of water. Code predictions were compared from load-case simulations selected to test different model features. The comparisons have resulted in a greater understanding of offshore floating wind turbine dynamics and modeling techniques, and better knowledge of the validity of various approximations. The lessons learned from this exercise have improved the participants' codes, thus improving the standard of offshore wind turbine modeling.

Jonkman, J.; Larsen, T.; Hansen, A.; Nygaard, T.; Maus, K.; Karimirad, M.; Gao, Z.; Moan, T.; Fylling, I.

2010-04-01T23:59:59.000Z

284

Offshore Code Comparison Collaboration within IEA Wind Task 23: Phase IV Results Regarding Floating Wind Turbine Modeling; Preprint  

DOE Green Energy (OSTI)

Offshore wind turbines are designed and analyzed using comprehensive simulation codes that account for the coupled dynamics of the wind inflow, aerodynamics, elasticity, and controls of the turbine, along with the incident waves, sea current, hydrodynamics, and foundation dynamics of the support structure. This paper describes the latest findings of the code-to-code verification activities of the Offshore Code Comparison Collaboration, which operates under Subtask 2 of the International Energy Agency Wind Task 23. In the latest phase of the project, participants used an assortment of codes to model the coupled dynamic response of a 5-MW wind turbine installed on a floating spar buoy in 320 m of water. Code predictions were compared from load-case simulations selected to test different model features. The comparisons have resulted in a greater understanding of offshore floating wind turbine dynamics and modeling techniques, and better knowledge of the validity of various approximations. The lessons learned from this exercise have improved the participants' codes, thus improving the standard of offshore wind turbine modeling.

Jonkman, J.; Larsen, T.; Hansen, A.; Nygaard, T.; Maus, K.; Karimirad, M.; Gao, Z.; Moan, T.; Fylling, I.

2010-04-01T23:59:59.000Z

285

Details Details... The Impact of Market Rules on Emerging "Green" Energy Markets  

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

1812 1812 Details, Details . . . The Impact of Market Rules on Emerging "Green" Energy Markets Ryan Wiser, Steven Pickle, and Joseph Eto Environmental Energy Technologies Division September 1998 The work described in this study was funded by the Assistant Secretary of Energy Efficiency and Renewable Energy, Office of Utility Technologies of the U.S. Department of Energy under Contract No. DE-AC03-76SF00098. For the sake of this paper, green power is defined as electricity that is differentiated based on its environmental attributes. 1 As a practical matter, nearly all such green power products include renewable energy. To the extent that customer purchases of green power offset conventional power supply, net environmental gains can be expected. 1 ABSTRACT

286

LCIS: a boundary hierarchy for detail-preserving contrast reduction  

Science Conference Proceedings (OSTI)

Keywords: displays, level of detail algorithms, non-realistic rendering, radiosity, signal processing, weird math

Jack Tumblin; Greg Turk

1999-07-01T23:59:59.000Z

287

A Detailed Chemical Kinetic Analysis of Low Temperature Non-Sooting Diesel Combustion  

DOE Green Energy (OSTI)

We have developed a model of the diesel fuel injection process for application to analysis of low temperature non-sooting combustion. The model uses a simplified mixing correlation and detailed chemical kinetics, and analyzes a parcel of fuel as it moves along the fuel jet, from injection into evaporation and ignition. The model predicts chemical composition and soot precursors, and is applied at conditions that result in low temperature non-sooting combustion. Production of soot precursors is the first step toward production of soot, and modeling precursor production is expected to give insight into the overall evolution of soot inside the engine. The results of the analysis show that the model has been successful in describing many of the observed characteristics of low temperature combustion. The model predicts results that are qualitatively similar to those obtained for soot formation experiments at conditions in which the EGR rate is increased from zero to very high values as the fueling rate is kept constant. The model also describes the two paths to achieve non-sooting combustion. The first is smokeless rich combustion and the second is modulated kinetics (MK). The importance of the temperature after ignition and the equivalence ratio at the time of ignition is demonstrated, as these parameters can be used to collapse onto a single line all the results for soot precursors for multiple fueling rates. A parametric analysis indicates that precursor formation increases considerably as the gas temperature in the combustion chamber and the characteristic mixing time are increased. The model provides a chemical kinetic description of low temperature diesel combustion that improves the understanding of this clean and efficient regime of operation.

Aceves, S M; Flowers, D L

2004-10-01T23:59:59.000Z

288

Lattice Wess-Zumino model with Ginsparg-Wilson fermions: One-loop results and GPU benchmarks  

E-Print Network (OSTI)

We numerically evaluate the one-loop counterterms for the four-dimensional Wess-Zumino model formulated on the lattice using Ginsparg-Wilson fermions of the overlap (Neuberger) variety, together with an auxiliary fermion (plus superpartners), such that a lattice version of $U(1)_R$ symmetry is exactly preserved in the limit of vanishing bare mass. We confirm previous findings by other authors that at one loop there is no renormalization of the superpotential in the lattice theory, but that there is a mismatch in the wavefunction renormalization of the auxiliary field. We study the range of the Dirac operator that results when the auxiliary fermion is integrated out, and show that localization does occur, but that it is less pronounced than the exponential localization of the overlap operator. We also present preliminary simulation results for this model, and outline a strategy for nonperturbative improvement of the lattice supercurrent through measurements of supersymmetry Ward identities. Related to this, some benchmarks for our graphics processing unit code are provided. Our simulation results find a nearly vanishing vacuum expectation value for the auxiliary field, consistent with approximate supersymmetry at weak coupling.

Chen Chen; Eric Dzienkowski; Joel Giedt

2010-05-18T23:59:59.000Z

289

Lattice Wess-Zumino model with Ginsparg-Wilson fermions: One-loop results and GPU benchmarks  

Science Conference Proceedings (OSTI)

We numerically evaluate the one-loop counterterms for the four-dimensional Wess-Zumino model formulated on the lattice using Ginsparg-Wilson fermions of the overlap (Neuberger) variety, together with an auxiliary fermion (plus superpartners), such that a lattice version of U(1){sub R} symmetry is exactly preserved in the limit of vanishing bare mass. We confirm previous findings by other authors that at one loop there is no renormalization of the superpotential in the lattice theory, but that there is a mismatch in the wave-function renormalization of the auxiliary field. We study the range of the Dirac operator that results when the auxiliary fermion is integrated out, and show that localization does occur, but that it is less pronounced than the exponential localization of the overlap operator. We also present preliminary simulation results for this model, and outline a strategy for nonperturbative improvement of the lattice supercurrent through measurements of supersymmetry Ward identities. Related to this, some benchmarks for our graphics processing unit code are provided. Our simulation results find a nearly vanishing vacuum expectation value for the auxiliary field, consistent with approximate supersymmetry at weak coupling.

Chen Chen; Dzienkowski, Eric; Giedt, Joel [Department of Physics, Applied Physics and Astronomy, Rensselaer Polytechnic Institute, 110 8th Street, Troy New York 12065 (United States)

2010-10-15T23:59:59.000Z

290

Using MiniBooNE neutral current elastic cross section results to constrain 3+1 sterile neutrino models  

E-Print Network (OSTI)

The MiniBooNE Neutral Current Elastic (NCEL) cross section results are used to extract limits in the $\\Delta m^{2}-\\sin^{2}\\vartheta_{\\mu s}$ plane for a 3+1 sterile neutrino model with a mass splitting $0.1 \\leq \\Delta m^{2} \\leq 10.0$ eV$^{2}$. GENIE is used with a cross section model close to the one employed by MiniBooNE to make event rate predictions using simulations on the MiniBooNE target material CH$_{2}$. The axial mass is a free parameter in all fits. Sterile modifications to the flux and changes to the cross section in the simulation relate the two and allow limits to be set on sterile neutrino mixing using cross section results. The large axial mass problem makes it necessary for experiments to perform their own axial mass fits, but a prior fit to the same dataset could mask a sterile oscillation signal. Results are given with and without a penalty term on the axial mass from a prior fit. We find that a simultaneous fit to the axial mass and the sterile neutrino parameters favours very high axial mass values. The general problems that the current uncertainty on charged-current quasi-elastic (CCQE) cross sections at MiniBooNE energies pose for sterile neutrino measurements are discussed.

Callum Wilkinson; Susan Cartwright; Lee Thompson

2013-09-04T23:59:59.000Z

291

Summary of the GRI regional sectoral electricity model and the issues relating to those results. Occasional pub  

SciTech Connect

Results are summarized for an analysis of the U.S. electric utility industry conducted as an outgrowth of the '1984 GRI Baseline Projection of U.S. Energy Supply and Demand, 1983-2010.' The GRI Regional Sectoral Electricity Model shows a potential increase in gas demand by electric utilities of over one quad by the year 2000 if gas-fired combined-cycle is used to help offset any potential shortfall in generating capacity. Key issues emerging from the study include load growth, new generating capacity, capacity utilization, fuel choice, financial performance, and electricity prices.

Hilt, R.H.; Coyne, J.M.; Makovich, L.J.

1987-03-01T23:59:59.000Z

292

Detailed Three-Dimensional Isentropic Analysis Using an Objective Cross-Sectional Approach  

Science Conference Proceedings (OSTI)

Recent developments in meteorological objective analysis have been directed towards improving numerical model initialization, often at the expense of preserving detail in data rich regions. The objective scheme presented here is designed to give ...

Ralph A. Petersen

1986-04-01T23:59:59.000Z

293

Detailed Burnup Calculations for Testing Nuclear Data  

Science Conference Proceedings (OSTI)

A general method (MCQ) has been developed by introducing a microscopic burnup scheme that uses the Monte Carlo calculated fluxes and microscopic reaction rates of a complex system and a depletion code for burnup calculations as a basis for solving nuclide material balance equations for each spatial region in which the system is divided. Continuous energy-dependent cross-section libraries and full 3D geometry of the system can be input for the calculations. The resulting predictions for the system at successive burnup time steps are thus based on a calculation route where both geometry and cross sections are accurately represented, without geometry simplifications and with continuous energy data, providing an independent approach for benchmarking other methods and nuclear data of actinides, fission products, and other burnable absorbers. The main advantage of this method over the classical deterministic methods currently used is that the MCQ System is a direct 3D method without the limitations and errors introduced on the homogenization of geometry and condensation of energy of deterministic methods. The Monte Carlo and burnup codes adopted until now are the widely used MCNP and ORIGEN codes, but other codes can be used also. For using this method, there is need of a well-known set of nuclear data for isotopes involved in burnup chains, including burnable poisons, fission products, and actinides. For fixing the data to be included in this set, a study of the present status of nuclear data is performed, as part of the development of the MCQ method. This study begins with a review of the available cross-section data of isotopes involved in burnup chains for power and research nuclear reactors. The main data needs for burnup calculations are neutron cross sections, decay constants, branching ratios, fission energy, and yields. The present work includes results of selected experimental benchmarks and conclusions about the sensitivity of different sets of cross-section data for burnup calculations, using some of the main available evaluated nuclear data files (ENDF-B-VI-Rel.8, JEFF-3.0, JENDL-3.3), on an isotope-by-isotope basis as much as possible. The selected experimental burnup benchmarks are reference cases for LWR and HWR reactors, with analysis of isotopic composition as a function of burnup. For LWR (H2O-moderated uranium oxide lattices) four benchmarks are included: ATM-104 NEA Burnup credit criticality benchmark; Yankee-Rowe Core V; H.B.Robinson Unit 2 and Turkey Point Unit 3. For HWR (D2O-moderated uranium oxide cluster lattices), three benchmarks were selected: NPD-19-rod Fuel Clusters; Pickering-28-rod Fuel Clusters; and Bruce-37-rod Fuel Clusters. The isotopes with experimental concentration data included in these benchmarks are: Se-79, Sr90, Tc99, Ru106, Sn126, Sb125,1129, Cs133-137, Nd143, 145, Sm149-150, 152, Eul53-155, U234-235, 238, Np237, Pu238-242, Am241-243, and Cm242-248. Results and analysis of differences between calculated and measured absolute and/or relative concentrations of these isotopes for the seven benchmarks are included in this work.

Leszczynski, F. [Centro Atomico Bariloche (CNEA), 8400 S.C.de Bariloche (Argentina)

2005-05-24T23:59:59.000Z

294

Health effects models for nuclear power plant accident consequence analysis: Modifications of models resulting from recent reports on health effects of ionizing radiation  

Science Conference Proceedings (OSTI)

The Nuclear Regulatory Commission has sponsored several studies to identify and quantify the potential health effects of accidental releases of radionuclides from nuclear power plants. The most recent health effects models resulting from these efforts were published in two reports, NUREG/CR-4214, Rev. 1, Part 1 (1990) and Part 2 (1989). Several major health effects reports have been published recently that may impact the health effects models presented in these reports. This addendum to the Part 2 (1989) report, provides a review of the 1986 and 1988 reports by the United Nations Scientific Committee on the Effects of Atomic Radiation, the National Academy of Sciences/National Research Council BEAR 5 Committee report and Publication 60 of the International Commission on Radiological Protection as they relate to this report. The three main sections of this addendum discuss early occurring and continuing effects, late somatic effects, and genetic effects. The major changes to the NUREG/CR-4214 health effects models recommended in this addendum are for late somatic effects. These changes reflect recent changes in cancer risk factors that have come from longer followup and revised dosimetry in major studies like that on the Japanese A-bomb survivors. The results presented in this addendum should be used with the basic NUREG/CR-4214 reports listed above to obtain the most recent views on the potential health effects of radionuclides released accidentally from nuclear power plants. 48 refs., 4 figs., 24 tabs.

Abrahamson, S. (Wisconsin Univ., Madison, WI (United States)); Bender, M.A. (Brookhaven National Lab., Upton, NY (United States)); Boecker, B.B.; Scott, B.R. (Lovelace Biomedical and Environmental Research Inst., Albuquerque, NM (United States). Inhalation Toxicology Research Inst.); Gilbert, E.S. (Pacific Northwest Lab., Richland, WA (United States))

1991-08-01T23:59:59.000Z

295

A Detailed Multi-Zone Thermodynamic Simulation For Direct-Injection Diesel Engine Combustion  

E-Print Network (OSTI)

A detailed multi-zone thermodynamic simulation has been developed for the direct-injection (DI) diesel engine combustion process. For the purpose of predicting heterogeneous type combustion systems, the model explores the formation of pre-ignition radicals, start of combustion, and eventual heat release. These mechanisms are described based on the current understanding and knowledge of the diesel engine combustion acquired through advanced laser-based diagnostics. Six zones are developed to take into account the surrounding bulk gas, liquid- and vapor-phase fuel, pre-ignition mixing, fuel-rich combustion products as well as the diffusion flame combustion products. A three-step phenomenological soot model and a nitric oxide emission model are applied based on where and when each of these reactions mainly occurs within the diesel fuel jet evolution process. The simulation is completed for a 4.5 liter, inline four-cylinder diesel engine for a range of operating conditions. Specifically, the engine possesses a compression ratio of 16.6, and has a bore and stroke of 106 and 127 mm. The results suggest that the simulation is able to accurately reproduce the fuel jet evolution and heat release process for conventional diesel engine combustion conditions. The soot and nitric oxide models are able to qualitatively predict the effects of various engine parameters on the engine-out emissions. In particular, the detailed thermodynamics and characteristics with respect to the combustion and emission formation processes are investigated for different engine speed/loads, injection pressures and timings, and EGR levels. The local thermodynamic properties and energy, mass distributions obtained from the simulation offer some fundamental insights into heterogeneous type combustion systems. The current work provides opportunities to better study and understand the diesel engine combustion and emission formation mechanisms for conventional diesel engine combustion modes. The flexible, low computational cost features of this simulation result in a convenient tool for conducting parametric studies, and benefits for engine control and diagnostics.

Xue, Xingyu 1985-

2012-12-01T23:59:59.000Z

296

Result Summary for the Area 5 Radioactive Waste Management Site Performance Assessment Model Version 4.110  

SciTech Connect

Results for Version 4.110 of the Area 5 Radioactive Waste Management Site (RWMS) performance assessment (PA) model are summarized. Version 4.110 includes the fiscal year (FY) 2010 inventory estimate, including a future inventory estimate. Version 4.110 was implemented in GoldSim 10.11(SP4). The following changes have been implemented since the last baseline model, Version 4.105: (1) Updated the inventory and disposal unit configurations with data through the end of FY 2010. (1) Implemented Federal Guidance Report 13 Supplemental CD dose conversion factors (U.S. Environmental Protection Agency, 1999). Version 4.110 PA results comply with air pathway and all-pathways annual total effective dose (TED) performance objectives (Tables 2 and 3, Figures 1 and 2). Air pathways results decrease moderately for all scenarios. The time of the maximum for the air pathway open rangeland scenario shifts from 1,000 to 100 years (y). All-pathways annual TED increases for all scenarios except the resident scenario. The maximum member of public all-pathways dose occurs at 1,000 y for the resident farmer scenario. The resident farmer dose was predominantly due to technetium-99 (Tc-99) (82 percent) and lead-210 (Pb-210) (13 percent). Pb-210 present at 1,000 y is produced predominantly by radioactive decay of uranium-234 (U-234) present at the time of disposal. All results for the postdrilling and intruder-agriculture scenarios comply with the performance objectives (Tables 4 and 5, Figures 3 and 4). The postdrilling intruder results are similar to Version 4.105 results. The intruder-agriculture results are similar to Version 4.105, except for the Pit 6 Radium Disposal Unit (RaDU). The intruder-agriculture result for the Shallow Land Burial (SLB) disposal units is a significant fraction of the performance objective and exceeds the performance objective at the 95th percentile. The intruder-agriculture dose is due predominantly to Tc-99 (75 percent) and U-238 (9.5 percent). The acute intruder scenario results comply with all performance objectives (Tables 6 and 7, Figures 5 and 6). The acute construction result for the SLB disposal units decreases significantly with this version. The maximum acute intruder dose occurs at 1,000 y for the SLB disposal units under the acute construction scenario. The acute intruder dose is caused by multiple radionuclides including U-238 (31 percent), Th-229 (28 percent), plutonium-239 (8.6 percent), U-233 (7.8 percent), and U-234 (6.7 percent). All results for radon-222 (Rn-222) flux density comply with the performance objective (Table 8, Figure 7). The mean Pit 13 RaDU flux density is close to the 0.74 Bq m{sup -2} s{sup -1} limit.

NSTec Environmental Management

2011-07-20T23:59:59.000Z

297

Methodology and results of the impacts of modeling electric utilities ; a comparative evaluation of MEMM and REM  

E-Print Network (OSTI)

This study compares two models of the U.S. electric utility industry including the EIA's electric utility submodel in the Midterm Energy Market Model (MEMM), and the Baughman-Joskow Regionalized Electricity Model (REM). ...

Baughman, Martin L.

1981-01-01T23:59:59.000Z

298

EERE Postdoctoral Research Awards: News Archives NewsDetail  

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

News Archives NewsDetail to someone by E-mail Share EERE Postdoctoral Research Awards: News Archives NewsDetail on Facebook Tweet about EERE Postdoctoral Research Awards: News...

299

EM Lays Out Details of Proposed Reorganization | Department of...  

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

EM Lays Out Details of Proposed Reorganization EM Lays Out Details of Proposed Reorganization December 8, 2011 - 12:00pm Addthis WASHINGTON, D.C. - EM Acting Assistant Secretary...

300

Results of a detailed gravity survey in the Alamosa Area, Alamosa County, Colorado  

DOE Green Energy (OSTI)

A total of 322 stations, centered on the City of Alamosa, were surveyed with a gravimeter during September 1981. These data have shown the Alamosa horst to have an irregular top. This irregularity is thought to be caused by paleovalleys and/or down-dropped fault blocks within the Precambrian horst. The City of Alamosa lies directly over a local gravity low. Volcanic rocks within this low may contain a reservoir for geothermal fluids, as yet unsubstantiated by drilling. Thermal fluids are thought to enter the Alamosa area via aquifers from the west (San Juan Mountains) and/or from the Rio Grande Rift zone with the fluids rising along fractures within and bordering the horst. The most favorable drilling targets appear to be either near the center of the local gravity low or in the fracture zone at the edges of the inferred down-dropped fault blocks.

Mackelprang, C.E.

1983-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "model results detailed" 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

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

Science Conference Proceedings (OSTI)

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

Not Available

1980-05-01T23:59:59.000Z

302

Housing Characteristics Detailed Tables - U.S. Energy Information ...  

U.S. Energy Information Administration (EIA)

Energy Information Administration. United States Department of Energy 1997 RESIDENTIAL ENERGY CONSUMPTION SURVEY HOUSING CHARACTERISTICS DETAILED DATA TABLES (FINAL)

303

1997 Consumption and Expenditures-Detailed Data Tables  

U.S. Energy Information Administration (EIA)

1997 Resdiential Energy Consumption Survey(RECS)-1997 Consumption and Expenditures-1997 Detailed Tables, Energy Information Administration

304

NREL: Technology Transfer - Updated Report Details an Emerging ...  

Updated Report Details an Emerging CPV Industry January 5, 2010. In November, the National Renewable Energy Laboratory ... Technology Transfer Home;

305

Engineering details of a stable force-directed placer  

E-Print Network (OSTI)

Analytic placement methods that simultaneously minimize wire length and spread cells are receiving renewed attention from both academia and industry. In this paper, we describe the implementation details of a force-directed placer, FDP. Specifically, we provide (1) a description of efficient force computation for spreading cells, (2) an illustration of numerical instability in these methods and a means by which these instabilities are avoided, (3) spread metrics for measuring cell distribution throughout the placement region and (4) a complementary technique which aids in directly minimizing HPWL. We present results comparing our analytic placer to other academic tools for both standard cell and mixed-size designs. Compared to Kraftwerk and Capo 8.7, our tool produces results with an average improvement of 9 % and 3%, respectively.

Kristofer Vorwerk

2004-01-01T23:59:59.000Z

306

Effect of explicit representation of detailed stratigraphy on brine and gas flow at the Waste Isolation Pilot Plant  

Science Conference Proceedings (OSTI)

Stratigraphic units of the Salado Formation at the Waste Isolation Pilot Plant (WIPP) disposal room horizon includes various layers of halite, polyhalitic halite, argillaceous halite, clay, and anhydrite. Current models, including those used in the WIPP Performance Assessment calculations, employ a ``composite stratigraphy`` approach in modeling. This study was initiated to evaluate the impact that an explicit representation of detailed stratigraphy around the repository may have on fluid flow compared to the simplified ``composite stratigraphy`` models currently employed. Sensitivity of model results to intrinsic permeability anisotropy, interbed fracturing, two-phase characteristic curves, and gas-generation rates were studied. The results of this study indicate that explicit representation of the stratigraphy maintains higher pressures and does not allow as much fluid to leave the disposal room as compared to the ``composite stratigraphy`` approach. However, the differences are relatively small. Gas migration distances are also different between the two approaches. However, for the two cases in which explicit layering results were considerably different than the composite model (anisotropic and vapor-limited), the gas-migration distances for both models were negligible. For the cases in which gas migration distances were considerable, van Genuchten/Parker and interbed fracture, the differences between the two models were fairly insignificant. Overall, this study suggests that explicit representation of the stratigraphy in the WIPP PA models is not required for the parameter variations modeled if ``global quantities`` (e.g., disposal room pressures, net brine and gas flux into and out of disposal rooms) are the only concern.

Christian-Frear, T.L.; Webb, S.W. [Sandia National Labs., Albuquerque, NM (United States). Geohydrology Dept.

1996-04-01T23:59:59.000Z

307

Federal Energy Management Program: FEMP News Archives NewsDetail  

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

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308

The Impact of GEM and MM5 Modeled Meteorological Conditions on CMAQ Air Quality Modeling Results in Eastern Canada and the Northeastern United States  

Science Conference Proceedings (OSTI)

The fifth-generation Pennsylvania State University–National Center for Atmospheric Research Mesoscale Model (MM5) is currently the meteorological model most widely used as input into the Community Multiscale Air Quality (CMAQ) modeling system. In ...

Steven C. Smyth; Dazhong Yin; Helmut Roth; Weimin Jiang; Michael D. Moran; Louis-Philippe Crevier

2006-11-01T23:59:59.000Z

309

Snow Mass over North America: Observations and Results from the Second Phase of the Atmospheric Model Intercomparison Project  

Science Conference Proceedings (OSTI)

Eighteen global atmospheric general circulation models (AGCMs) participating in the second phase of the Atmospheric Model Intercomparison Project (AMIP-2) are evaluated for their ability to simulate the observed spatial and temporal variability ...

Allan Frei; Ross Brown; James A. Miller; David A. Robinson

2005-10-01T23:59:59.000Z

310

Albedo Feedback, the Meridional Structure of the Effective Heat Diffusivity, and Climatic Sensitivity: Results from Dynamic and Diffusive Models  

Science Conference Proceedings (OSTI)

The sensitivity of a two-level primitive equation atmospheric model to solar constant perturbations is examined in the presence of surface albedo feedback. The model is simplified to the point that a large number of numerical experiments can be ...

Isaac M. Held; David I. Linder; Max J. Suarez

1981-09-01T23:59:59.000Z

311

Medium Range Prediction by a GFDL Global Spectral Model: Results for Three Winter Cases and Sensitivity to Dissipation  

Science Conference Proceedings (OSTI)

A preliminary evaluation is made of the medium range predictive capability of a GFDL global spectral model of the atmosphere, based upon three winter blocking cases. Analogous forecasts by a GFDL global grid point model provide a background ...

Charles T. Gordon; William P. Stern

1984-02-01T23:59:59.000Z

312

Search Results Quadrats  

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

2arr.lasso121112 5:07:23 PM Search Results Quadrats Public Quadrats Data collected by the public with the guidance of docents. Click the Quadrat Id to view more details about...

313

Details, Details... The Impact of Market Rules on Emerging "Green " Energy Markets  

E-Print Network (OSTI)

Green power marketing is creating a customer-driven market for renewable energy resources, including solar, wind, geothermal, biomass, and hydropower. Yet there are a number of “market barriers” to the creation of a workable green power market, and the ultimate success of retail markets for green power products will depend critically on the detailed “market rules ” established at the onset of restructuring and on a number of “market facilitation ” efforts. By surveying green power marketers and reviewing regulatory filings, this paper identifies and analyzes the types of restructuring market rules and market facilitation efforts that impact the competitive market for electricity services broadly, and the retail market for green power specifically. Taking a marketer perspective as our point of reference, we emphasize those rules and efforts that most effectively target key market barriers and that might be most successful in expanding the market for retail green power products. This information should help those interested in encouraging the development of the green power market during the early years of electricity restructuring.

Ernest Orlando Lawrence; Ryan Wiser; Steven Pickle; Joseph Eto

1998-01-01T23:59:59.000Z

314

Vadose zone transport field study: Detailed test plan for simulated leak tests  

Science Conference Proceedings (OSTI)

The US Department of Energy (DOE) Groundwater/Vadose Zone Integration Project Science and Technology initiative was created in FY 1999 to reduce the uncertainty associated with vadose zone transport processes beneath waste sites at DOE's Hanford Site near Richland, Washington. This information is needed not only to evaluate the risks from transport, but also to support the adoption of measures for minimizing impacts to the groundwater and surrounding environment. The principal uncertainties in vadose zone transport are the current distribution of source contaminants and the natural heterogeneity of the soil in which the contaminants reside. Oversimplified conceptual models resulting from these uncertainties and limited use of hydrologic characterization and monitoring technologies have hampered the understanding contaminant migration through Hanford's vadose zone. Essential prerequisites for reducing vadose transport uncertainly include the development of accurate conceptual models and the development or adoption of monitoring techniques capable of delineating the current distributions of source contaminants and characterizing natural site heterogeneity. The Vadose Zone Transport Field Study (VZTFS) was conceived as part of the initiative to address the major uncertainties confronting vadose zone fate and transport predictions at the Hanford Site and to overcome the limitations of previous characterization attempts. Pacific Northwest National Laboratory (PNNL) is managing the VZTFS for DOE. The VZTFS will conduct field investigations that will improve the understanding of field-scale transport and lead to the development or identification of efficient and cost-effective characterization methods. Ideally, these methods will capture the extent of contaminant plumes using existing infrastructure (i.e., more than 1,300 steel-cased boreholes). The objectives of the VZTFS are to conduct controlled transport experiments at well-instrumented field sites at Hanford to: identify mechanisms controlling transport processes in soils typical of the hydrogeologic conditions of Hanford's waste disposal sites; reduce uncertainty in conceptual models; develop a detailed and accurate database of hydraulic and transport parameters for validation of three-dimensional numerical models; identify and evaluate advanced, cost-effective characterization methods with the potential to assess changing conditions in the vadose zone, particularly as surrogates of currently undetectable high-risk contaminants. This plan provides details for conducting field tests during FY 2000 to accomplish these objectives. Details of additional testing during FY 2001 and FY 2002 will be developed as part of the work planning process implemented by the Integration Project.

AL Ward; GW Gee

2000-06-23T23:59:59.000Z

315

Heat Exchangers Fouling and Corrosion-A Detailed Investigation  

Science Conference Proceedings (OSTI)

Presentation Title, Aluminum Smelter Waste Heat Recovery Plant (Heat Exchangers Fouling and Corrosion-A Detailed Investigation). Author(s), Hadi Fanisalek, ...

316

NREL: News - NREL Releases Renewable Energy Data Book Detailing...  

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

Release NR-6113 NREL Releases Renewable Energy Data Book Detailing Growing Industry in 2012 November 21, 2013 The National Renewable Energy Laboratory (NREL) has released the 2012...

317

Microsoft Word - Methods for Detailed Energy Data Collection...  

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

provides a detailed energy estimate for each product category, data for shipment, stock, 7 device power consumption, and usage patterns are subject to different, and often...

318

ARM-UAV TWP-ICE Payload Instrumentation Details  

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

Payload Instrumentation Details McCoy, Robert Sandia National Laboratories Tooman, Tim Sandia National Laboratories McFarquhar, Greg University of Illinois Category: Field...

319

Idaho's Advanced Mixed Waste Treatment Project Details 2013Accomplish...  

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

Treatment Project Details 2013 Accomplishments December 24, 2013 - 12:00pm Addthis IDAHO FALLS, Idaho - EM and its contractor, Idaho Treatment Group (ITG), safely and...

320

Determining Plutonium Mass in Spent Fuel with Nondestructive Assay Techniques -- Preliminary Modeling Results Emphasizing Integration among Techniques  

Science Conference Proceedings (OSTI)

There are a variety of motivations for quantifying Pu in spent (used) fuel assemblies by means of nondestructive assay (NDA) including the following: strengthen the capabilities of the International Atomic Energy Agencies to safeguards nuclear facilities, quantifying shipper/receiver difference, determining the input accountability value at reprocessing facilities and providing quantitative input to burnup credit determination for repositories. For the purpose of determining the Pu mass in spent fuel assemblies, twelve NDA techniques were identified that provide information about the composition of an assembly. A key point motivating the present research path is the realization that none of these techniques, in isolation, is capable of both (1) quantifying the elemental Pu mass of an assembly and (2) detecting the diversion of a significant number of pins. As such, the focus of this work is determining how to best integrate 2 or 3 techniques into a system that can quantify elemental Pu and to assess how well this system can detect material diversion. Furthermore, it is important economically to down-select among the various techniques before advancing to the experimental phase. In order to achieve this dual goal of integration and down-selection, a Monte Carlo library of PWR assemblies was created and is described in another paper at Global 2009 (Fensin et al.). The research presented here emphasizes integration among techniques. An overview of a five year research plan starting in 2009 is given. Preliminary modeling results for the Monte Carlo assembly library are presented for 3 NDA techniques: Delayed Neutrons, Differential Die-Away, and Nuclear Resonance Fluorescence. As part of the focus on integration, the concept of"Pu isotopic correlation" is discussed and the role of cooling time determination.

Tobin, S. J.; Fensin, M. L.; Ludewigt, B. A.; Menlove, H. O.; Quiter, B. J.; Sandoval, N. P.; Swinhoe, M. T.; Thompson, S. J.

2009-08-03T23:59:59.000Z

Note: This page contains sample records for the topic "model results detailed" 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

Modeling the performance of a two-phase turbine using numerical methods and the results of nozzle, static cascade, and windage experiments  

DOE Green Energy (OSTI)

Performance models for a two-phase turbine were developed to verify the understanding of the loss mechanisms and to extrapolate from the single-nozzle test condition to a full-admission turbine. The numerical models for predicting the performance of the nozzle and the combined nozzle and rotor are described. Results from two-phase, static cascade tests and disk-friction and windage experiments are used to calibrate the performance model(s). Model predictions are compared with single-nozzle prototype-turbine test results, and extrapolations are made to a full-admission design. The modeling also provides predictions of performance for turbines with various blade geometries, inlet conditions, and droplet sizes. Thus the modeling provides insight into design improvements.

Comfort, W.J. III

1978-06-21T23:59:59.000Z

322

Health effects models for nuclear power plant accident consequence analysis. Modification of models resulting from addition of effects of exposure to alpha-emitting radionuclides: Revision 1, Part 2, Scientific bases for health effects models, Addendum 2  

SciTech Connect

The Nuclear Regulatory Commission (NRC) has sponsored several studies to identify and quantify, through the use of models, the potential health effects of accidental releases of radionuclides from nuclear power plants. The Reactor Safety Study provided the basis for most of the earlier estimates related to these health effects. Subsequent efforts by NRC-supported groups resulted in improved health effects models that were published in the report entitled {open_quotes}Health Effects Models for Nuclear Power Plant Consequence Analysis{close_quotes}, NUREG/CR-4214, 1985 and revised further in the 1989 report NUREG/CR-4214, Rev. 1, Part 2. The health effects models presented in the 1989 NUREG/CR-4214 report were developed for exposure to low-linear energy transfer (LET) (beta and gamma) radiation based on the best scientific information available at that time. Since the 1989 report was published, two addenda to that report have been prepared to (1) incorporate other scientific information related to low-LET health effects models and (2) extend the models to consider the possible health consequences of the addition of alpha-emitting radionuclides to the exposure source term. The first addendum report, entitled {open_quotes}Health Effects Models for Nuclear Power Plant Accident Consequence Analysis, Modifications of Models Resulting from Recent Reports on Health Effects of Ionizing Radiation, Low LET Radiation, Part 2: Scientific Bases for Health Effects Models,{close_quotes} was published in 1991 as NUREG/CR-4214, Rev. 1, Part 2, Addendum 1. This second addendum addresses the possibility that some fraction of the accident source term from an operating nuclear power plant comprises alpha-emitting radionuclides. Consideration of chronic high-LET exposure from alpha radiation as well as acute and chronic exposure to low-LET beta and gamma radiations is a reasonable extension of the health effects model.

Abrahamson, S. [Wisconsin Univ., Madison, WI (United States); Bender, M.A. [Brookhaven National Lab., Upton, NY (United States); Boecker, B.B.; Scott, B.R. [Lovelace Biomedical and Environmental Research Inst., Albuquerque, NM (United States). Inhalation Toxicology Research Inst.; Gilbert, E.S. [Pacific Northwest Lab., Richland, WA (United States)

1993-05-01T23:59:59.000Z

323

MM5 Modeling of the Madden–Julian Oscillation in the Indian and West Pacific Oceans: Model Description and Control Run Results  

Science Conference Proceedings (OSTI)

A new methodology to study the Madden–Julian oscillation (MJO) is introduced. While previous MJO studies typically have involved highly simplified mathematical models or general circulation models, this new approach seeks to reproduce the MJO by ...

William I. Gustafson Jr.; Bryan C. Weare

2004-03-01T23:59:59.000Z

324

Energy and Emissions Long Term Outlook A Detailed Simulation of Energy Supply-Demand  

E-Print Network (OSTI)

The paper presents the results of a detailed, bottom-up modeling exercise of Mexico’s energy markets. The Energy and Power Evaluation Program (ENPEP), the Wien Automatic System Planning (WASP) and the Energy Demand Model (MODEMA) were used to develop forecasts to 2025. Primary energy supply is projected to grow from 9,313 PJ (1999) to 13,130 PJ (2025). Mexico’s crude oil production is expected to increase by 1 % annually to 8,230 PJ. As its domestic crude refining capacity becomes unable to meet the rising demand for petroleum products, imports of oil products will become increasingly important. The Mexican natural gas markets are driven by the strong demand for gas in the power generating and manufacturing industries which significantly outpaces projected domestic production. The result is a potential need for large natural gas imports that may reach approximately 46 % of total gas supplies by 2025. The long-term market outlook for Mexico’s electricity industry shows a heavy reliance on naturalgas based generating technologies. Gas-fired generation is forecast to increase 26-fold eventually accounting for over 80 % of total generation by 2025. Alternative results for a constrained-gas scenario show a substantial shift to coal-based generation and the associated effects on the natural gas market. A renewables scenario – investigates impacts of additional renewables for power generation (primarily wind plus some solar-photovoltaic). A nuclear scenario – analyzes the impacts of additional nuclear power

Juan Quintanilla Martínez; Autónoma México; Centro Mario Molina; Juan Quintanilla Martínez

2005-01-01T23:59:59.000Z

325

Greenland Surface Mass Balance as Simulated by the Community Earth System Model. Part I: Model Evaluation and 1850-2005 Results  

Science Conference Proceedings (OSTI)

The modeling of the surface mass balance (SMB) of the Greenland ice sheet (GIS) requires high-resolution models in order to capture the observed large gradients in the steep marginal areas. Until now, global climate models have not been considered ...

Miren Vizcaíno; William H. Lipscomb; William J. Sacks; Jan H. van Angelen; Bert Wouters; Michiel R. van den Broeke

326

Greenland Surface Mass Balance as Simulated by the Community Earth System Model. Part I: Model Evaluation and 1850–2005 Results  

Science Conference Proceedings (OSTI)

The modeling of the surface mass balance (SMB) of the Greenland Ice Sheet (GIS) requires high-resolution models in order to capture the observed large gradients in the steep marginal areas. Until now, global climate models have not been considered ...

Miren Vizcaíno; William H. Lipscomb; William J. Sacks; Jan H. van Angelen; Bert Wouters; Michiel R. van den Broeke

2013-10-01T23:59:59.000Z

327

The Land Surface Scheme ISBA within the Météo-France Climate Model ARPEGE. Part I. Implementation and Preliminary Results  

Science Conference Proceedings (OSTI)

This paper describes recent developments in climate modeling at Météo-France related to land surface processes. The implementation of a simple land surface parameterization, Interactions between Soil Biosphere Atmosphere (ISBA), has gained from ...

J-F. Mahfouf; A. O. Manzi; J. Noilhan; H. Giordani; M. DéQué

1995-08-01T23:59:59.000Z

328

On the Dynamics of Planetary Flow Regimes. Part II: Results from a Hierarchy of Orographically Forced Models  

Science Conference Proceedings (OSTI)

The relationship between steady states of the large-scale flow regimes revealed by multimodality in phase space and quasi-resonant axes of a linearized atmospheric model (neutral vectors) is investigated by means of a hierarchy of three ...

Franco Molteni

1996-07-01T23:59:59.000Z

329

Emission-Induced Nonlinearities in the Global Aerosol System: Results from the ECHAM5-HAM Aerosol-Climate Model  

Science Conference Proceedings (OSTI)

In a series of simulations with the global ECHAM5-HAM aerosol-climate model, the response to changes in anthropogenic emissions is analyzed. Traditionally, additivity is assumed in the assessment of the aerosol climate impact, as the underlying ...

Philip Stier; Johann Feichter; Silvia Kloster; Elisabetta Vignati; Julian Wilson

2006-08-01T23:59:59.000Z

330

Tolman Test from z = 0.1 to z = 5.5: Preliminary results challenge the expanding universe model  

E-Print Network (OSTI)

We performed the Tolman surface-brightness test for the expansion of the universe using a large UV dataset of disk galaxies in a wide range of redshifts (from 0.03 to 5.7). We combined data for low-z galaxies from GALEX observations with those for high-z objects from HST UltraDeep Field images. Starting from the data in publicly- available GALEX and UDF catalogs, we created 6 samples of galaxies with observations in a rest-frame band centered at 141 nm and 5 with data from one centered on 225 nm. These bands correspond, respectively, to the FUV and NUV bands of GALEX for objects at z = 0.1. By maintaining the same rest-frame wave-band of all observations we greatly minimized the effects of k-correction and filter transformation. Since SB depends on the absolute magnitude, all galaxy samples were then matched for the absolute magnitude range (-17.7 data with two models: 1) The LCDM expanding universe model with the widely-accepted evolution of galaxy size R prop H(z)-1 and 2) a simple, Euclidean, non-expanding (ENE) model with the distance given by d=cz/H0. We found that the ENE model was a significantly better fit to the data than the LCDM model with galaxy size evolution. While the LCDM model provides a good fit to the HUDF data alone, there is a 1.2 magnitude difference in the SB predicted from the model for the GALEX data and observations, a difference at least 5 times larger than any statistical error. The ENE provides a good fit to all the data except the two points with z>4.

Eric J. Lerner

2009-06-23T23:59:59.000Z

331

Investigation of Droplet Size Distributions and Drizzle Formation Using a New Trajectory Ensemble Model. Part I: Model Description and First Results in a Nonmixing Limit  

Science Conference Proceedings (OSTI)

A novel trajectory ensemble model of a stratocumulus cloud is described. In this model, the boundary layer (BL) is fully covered by a great number of Lagrangian air parcels that during their motion can contain either wet aerosols or aerosols and ...

M. Pinsky; L. Magaritz; A. Khain; O. Krasnov; A. Sterkin

2008-07-01T23:59:59.000Z

332

Predictive geochemical modeling of interactions between uranium-mill-tailings solutions and sediments in a flow-through system: model formulations and preliminary results  

Science Conference Proceedings (OSTI)

An equilibrium thermodynamic conceptual model consisting of minerals and solid phases was developed to represent a soil column. A computer program was used as a tool to solve the system of mathematical equations imposed by the conceptual chemical model. The combined conceptual model and computer program were used to predict aqueous phase compositions of effluent solutions from permeability cells packed with geologic materials and percolated with uranium mill tailings solutions. Initial calculations of ion speciation and mineral solubility and our understanding of the chemical processes occurring in the modeled system were used to select solid phases for inclusion in the conceptual model. The modeling predictions were compared to the analytically determined column effluent concentrations. Hypotheses were formed, based on modeling predictions and laboratory evaluations, as to the probable mechanisms controlling the migration of selected contaminants. An assemblage of minerals and other solid phases could be used to predict the concentrations of several of the macro constituents (e.g., Ca, SO/sub 4/, Al, Fe, and Mn) but could not be used to predict trace element concentrations. These modeling conclusions are applicable to situations where uranium mill tailings solutions of low pH and high total dissolved solids encounter either clay liners or natural geologic materials that contain inherent acid neutralizing capacities. 116 references, 22 figures, 6 tables.

Peterson, S.R.; Felmy, A.R.; Serne, R.J.; Gee, G.W.

1983-08-01T23:59:59.000Z

333

WMAP First Year Results  

E-Print Network (OSTI)

The Wilkinson Microwave Anisotropy Probe (WMAP) science team has released results from the first year of operation at the Earth-Sun L2 Lagrange point. The maps are consistent with previous observations but have much better sensitivity and angular resolution than the COBE DMR maps, and much better calibration accuracy and sky coverage than ground-based and balloon-borne experiments. The angular power spectra from these ground-based and balloon-borne experiments are consistent within their systematic and statistical uncertainties with the WMAP results. WMAP detected the large angular-scale correlation between the temperature and polarization anisotropies of the CMB caused by electron scattering since the Universe became reionized after the "Dark Ages", giving a value for the electron scattering optical depth of 0.17+/-0.04. The simplest Lambda-CDM model with n=1 and Omega_tot=1 provides an adequate fit to the WMAP data and gives parameters which are consistent with determinations of the Hubble constant and observations of the accelerating Universe using supernovae. The time-ordered data, maps, and power spectra from WMAP can be found at http://lambda.gsfc.nasa.gov along with 13 papers by the WMAP science team describing the results in detail.

E. L. Wright

2003-06-05T23:59:59.000Z

334

The Dispersion of Tracer Plumes in Mountainous Regions in Central Arizona: Comparisons between Observations and Modeling Results  

Science Conference Proceedings (OSTI)

A three-dimensional, time-dependent, nested-grid model is used to calculate the targeting of tracer or Seeding material over complex terrain in northern Arizona. Good agreement with measurements of SF6 tracer is reported in three case studies. ...

Roelof T. Bruintjes; Terry L. Clark; William D. Hall

1995-04-01T23:59:59.000Z

335

Aircraft Microwave Observations and Simulations of Deep Convection from 18 to 183 GHz. Part II: Model Results  

Science Conference Proceedings (OSTI)

In Part II of the 29 June 1986 case study, a radiative transfer model is used to simulate the aircraft multichannel microwave brightness temperatures presented in Part I and to study the convective storm structure. Ground-based radar data are ...

Hwa-Young M. Yeh; N. Prasad; Robert A. Mack; Robert F. Adler

1990-06-01T23:59:59.000Z

336

Multicentury Changes to the Global Climate and Carbon Cycle: Results from a Coupled Climate and Carbon Cycle Model  

Science Conference Proceedings (OSTI)

A coupled climate and carbon (CO2) cycle model is used to investigate the global climate and carbon cycle changes out to the year 2300 that would occur if CO2 emissions from all the currently estimated fossil fuel resources were released to the ...

G. Bala; K. Caldeira; A. Mirin; M. Wickett; C. Delire

2005-11-01T23:59:59.000Z

337

Temporal Variations of Aerosol Optical Parameters Resulting from the Aging of a Model Aerosol Number Size Distribution  

Science Conference Proceedings (OSTI)

Aerosol number size distributions are subject to aging, i.e., to temporal variations. The aging of a Junge number size distribution due to a multitude of processes was modeled by Junge and Abel. The pertinent changes with time of aerosol optical ...

J. Freund

1984-04-01T23:59:59.000Z

338

Stream sediment detailed geochemical survey for Date Creek Basin, Arizona  

SciTech Connect

Results of the Date Creek Basin detailed geochemical survey are reported. Field and laboratory data are reported for 239 stream sediment samples. Statistical and areal distributions of uranium and possible uranium-related variables are displayed. A generalized geologic map of the area is provided, and pertinent geologic factors which may be of significance in evaluating the potential for uranium mineralization are briefly discussed. Based on stream sediment geochemical data, significant concentrations of uranium are restricted to the Anderson Mine area. The 84th percentile concentrations of U-FL, U-NT, and U-FL/U-NT combined with low thorium/U-NT values reflect increased mobility and enrichment of uranium in the carbonate host rocks of that area. Elements characteristically associated with the uranium mineralization include lithium and arsenic. No well defined diffusion halos suggesting outliers of similar uranium mineralization were observed from the stream sediment data in other areas of the Date Creek Basin. Significant concentrations of U-FL or U-NT found outside the mine area are generally coincident with low U-FL/U-NT values and high concentrations of zirconium, titanium, and phosphorus. This suggests that the uranium is related to a resistate mineral assemblage derived from surrounding crystalline igneous and metamorphic rocks.

Butz, T.R.; Tieman, D.J.; Grimes, J.G.; Bard, C.S.; Helgerson, R.N.; Pritz, P.M.

1980-06-30T23:59:59.000Z

339

North American CO2 exchange: Inter comparison of modeled estimates with results from a fine scale atmospheric inversion  

E-Print Network (OSTI)

Monitoring  Division  Tall  Tower  Network,   http://These  include  two  tall  towers  with  a  height  of  dioxide  on  very  tall   towers:    Results  of  the  NOAA/

Gourdji, Sharon M.

2013-01-01T23:59:59.000Z

340

Detailed high-accuracy megavoltage transmission measurements: A sensitive experimental benchmark of EGSnrc  

Science Conference Proceedings (OSTI)

Purpose: There are three goals for this study: (a) to perform detailed megavoltage transmission measurements in order to identify the factors that affect the measurement accuracy, (b) to use the measured data as a benchmark for the EGSnrc system in order to identify the computational limiting factors, and (c) to provide data for others to benchmark Monte Carlo codes. Methods: Transmission measurements are performed at the National Research Council Canada on a research linac whose incident electron parameters are independently known. Automated transmission measurements are made on-axis, down to a transmission value of {approx}1.7%, for eight beams between 10 MV (the lowest stable MV beam on the linac) and 30 MV, using fully stopping Be, Al, and Pb bremsstrahlung targets and no fattening filters. To diversify energy differentiation, data are acquired for each beam using low-Z and high-Z attenuators (C and Pb) and Farmer chambers with low-Z and high-Z buildup caps. Experimental corrections are applied for beam drifts (2%), polarity (2.5% typical maximum, 6% extreme), ion recombination (0.2%), leakage (0.3%), and room scatter (0.8%)-the values in parentheses are the largest corrections applied. The experimental setup and the detectors are modeled using EGSnrc, with the newly added photonuclear attenuation included (up to a 5.6% effect). A detailed sensitivity analysis is carried out for the measured and calculated transmission data. Results: The developed experimental protocol allows for transmission measurements with 0.4% uncertainty on the smallest signals. Suggestions for accurate transmission measurements are provided. Measurements and EGSnrc calculations agree typically within 0.2% for the sensitivity of the transmission values to the detector details, to the bremsstrahlung target material, and to the incident electron energy. Direct comparison of the measured and calculated transmission data shows agreement better than 2% for C (3.4% for the 10 MV beam) and typically better than 1% for Pb. The differences can be explained by acceptable photon cross section changes of Less-Than-Or-Slanted-Equal-To 0.4%. Conclusions: Accurate transmission measurements require accounting for a number of influence quantities which, if ignored, can collectively introduce errors larger than 10%. Accurate transmission calculations require the use of the most accurate data and physics options available in EGSnrc, particularly the more accurate bremsstrahlung angular sampling option and the newly added modeling of photonuclear attenuation. Comparison between measurements and calculations implies that EGSnrc is accurate within 0.2% for relative ion chamber response calculations. Photon cross section uncertainties are the ultimate limiting factor for the accuracy of the calculated transmission data (Monte Carlo or analytical).

Ali, E. S. M.; McEwen, M. R.; Rogers, D. W. O. [Carleton Laboratory for Radiotherapy Physics, Department of Physics, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario K1S 5B6 (Canada); Ionizing Radiation Standards, Institute for National Measurement Standards, National Research Council, M-35 Montreal Rd, Ottawa, Ontario K1A 0R5 (Canada); Carleton Laboratory for Radiotherapy Physics, Department of Physics, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario K1S 5B6 (Canada)

2012-10-15T23:59:59.000Z

Note: This page contains sample records for the topic "model results detailed" 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

CBECS 1993 - Federal Buildings Supplement Survey - Detailed Tables  

U.S. Energy Information Administration (EIA) Indexed Site

Publication > Detailed Tables Publication > Detailed Tables Detailed Tables Percent of FBSS Buildings and Floorspace by Selected Agencies, FY 1993 Percent of FBSS Buildings and Floorspace by Selected Agencies, FY 1993 Sources: Energy Information Administration, Energy Markets and End Use, 1993 Federal Buildings Supplemental Survey. Divider Line To View and/or Print Reports (requires Adobe Acrobat Reader) - Download Adobe Acrobat Reader If you experience any difficulties, visit our Technical Frequently Asked Questions. Divider Line You have the option of downloading the entire set of tables or selected tables by data item. Full Set of Tables - Federal Buildings Supplemental Survey, 1993 (file size 770,290 bytes) pages: 123 Detailed Table Information (file size 45,044 bytes) pages: 7, includes:

342

SLAC National Accelerator Laboratory - SLAC Scientists Make Detailed...  

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

Make Detailed Map of Current Between Insulators By Glennda Chui September 12, 2013 When scientists found electrical current flowing where it shouldn't be - at the place where two...

343

VEHICLE AND BATTERY DESCRIPTIONS AND SPECIFICATIONS Vehicle Details  

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

Page 1 VEHICLE AND BATTERY DESCRIPTIONS AND SPECIFICATIONS Vehicle Details Base Vehicle: 2011 Honda CR-Z VIN: JHMZF1C67BS004466 Electric Machine 1 : 10 kW (peak), permanent magnet...

344

Two Studies Reveal Details of Lithium-Battery Function  

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

YouTube: AdvancedLightSource Home Research Areas Two Studies Reveal Details of Lithium-Battery Function Print Our way of life is deeply intertwined with battery technologies that...

345

VEHICLE AND BATTERY DESCRIPTIONS AND SPECIFICATIONS Vehicle Details  

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

Page 1 VEHICLE AND BATTERY DESCRIPTIONS AND SPECIFICATIONS Vehicle Details Base Vehicle: 2011 Honda CR-Z VIN: JHMZF1C64BS002982 Electric Machine 1 : 10 kW (peak), permanent magnet...

346

RMR CRSP Capital Investment Plan FY12-FY21 Detail  

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

Plan FY12-FY21 Detail Yellow Highlight New Project to list W Total Western Only Costs Red Text Change from previous version O Total Trust and Joint Participation...

347

Aerosols in a Changing Atmosphere: From Detailed Aerosol Microphysics...  

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

Aerosols in a Changing Atmosphere: From Detailed Aerosol Microphysics to Policy Applications Speaker(s): Susanne Bauer Date: December 6, 2011 - 4:00pm Location: 90-4133 Seminar...

348

Solar production of industrial process steam. Final detail design report  

SciTech Connect

The application of solar energy to produce 110 psig industrial steam for processing laundry and drycleaning for a facility in Pasadena, California, is described. The system uses tracking parabolic trough collectors. The collectors, the detailed process analyses, solar calculations and insolation data, energy reduction analyses, economic analyses, design of the solar system, construction, and costs are presented in detail. Included in appendices are the following: mechanical specifications and calculations, electrical specifications and calculations, and structural specifications and calculations. (MHR)

Eldridge, B.G.

1978-06-15T23:59:59.000Z

349

Human Factors Considerations in New Nuclear Power Plants: Detailed Analysis.  

Science Conference Proceedings (OSTI)

This Nuclear Regulatory Commission (NRC) sponsored study has identified human-performance issues in new and advanced nuclear power plants. To identify the issues, current industry developments and trends were evaluated in the areas of reactor technology, instrumentation and control technology, human-system integration technology, and human factors engineering (HFE) methods and tools. The issues were organized into seven high-level HFE topic areas: Role of Personnel and Automation, Staffing and Training, Normal Operations Management, Disturbance and Emergency Management, Maintenance and Change Management, Plant Design and Construction, and HFE Methods and Tools. The issues where then prioritized into four categories using a 'Phenomena Identification and Ranking Table' methodology based on evaluations provided by 14 independent subject matter experts. The subject matter experts were knowledgeable in a variety of disciplines. Vendors, utilities, research organizations and regulators all participated. Twenty issues were categorized into the top priority category. This Brookhaven National Laboratory (BNL) technical report provides the detailed methodology, issue analysis, and results. A summary of the results of this study can be found in NUREG/CR-6947. The research performed for this project has identified a large number of human-performance issues for new control stations and new nuclear power plant designs. The information gathered in this project can serve as input to the development of a long-term strategy and plan for addressing human performance in these areas through regulatory research. Addressing human-performance issues will provide the technical basis from which regulatory review guidance can be developed to meet these challenges. The availability of this review guidance will help set clear expectations for how the NRC staff will evaluate new designs, reduce regulatory uncertainty, and provide a well-defined path to new nuclear power plant licensing.

OHara,J.; Higgins, J.; Brown, W.; Fink, R.

2008-02-14T23:59:59.000Z

350

Model of Procedure Usage – Results from a Qualitative Study to Inform Design of Computer-Based Procedures  

SciTech Connect

The nuclear industry is constantly trying to find ways to decrease the human error rate, especially the human errors associated with procedure use. As a step toward the goal of improving procedure use performance, researchers, together with the nuclear industry, have been looking at replacing the current paper-based procedures with computer-based procedure systems. The concept of computer-based procedures is not new by any means; however most research has focused on procedures used in the main control room. Procedures reviewed in these efforts are mainly emergency operating procedures and normal operating procedures. Based on lessons learned for these previous efforts we are now exploring a more unknown application for computer based procedures - field procedures, i.e. procedures used by nuclear equipment operators and maintenance technicians. The Idaho National Laboratory, the Institute for Energy Technology, and participants from the U.S. commercial nuclear industry are collaborating in an applied research effort with the objective of developing requirements and specifications for a computer-based procedure system to be used by field operators. The goal is to identify the types of human errors that can be mitigated by using computer-based procedures and how to best design the computer-based procedures to do this. The underlying philosophy in the research effort is “Stop – Start – Continue”, i.e. what features from the use of paper-based procedures should we not incorporate (Stop), what should we keep (Continue), and what new features or work processes should be added (Start). One step in identifying the Stop – Start – Continue was to conduct a baseline study where affordances related to the current usage of paper-based procedures were identified. The purpose of the study was to develop a model of paper based procedure use which will help to identify desirable features for computer based procedure prototypes. Affordances such as note taking, markups, sharing procedures between fellow coworkers, the use of multiple procedures at once, etc. were considered. The model describes which affordances associated with paper based procedures should be transferred to computer-based procedures as well as what features should not be incorporated. The model also provides a means to identify what new features not present in paper based procedures need to be added to the computer-based procedures to further enhance performance. The next step is to use the requirements and specifications to develop concepts and prototypes of computer-based procedures. User tests and other data collection efforts will be conducted to ensure that the real issues with field procedures and their usage are being addressed and solved in the best manner possible. This paper describes the baseline study, the construction of the model of procedure use, and the requirements and specifications for computer-based procedures that were developed based on the model. It also addresses how the model and the insights gained from it were used to develop concepts and prototypes for computer based procedures.

Johanna H Oxstrand; Katya L Le Blanc

2012-07-01T23:59:59.000Z

351

Impacts of a gas cartel on the European gas market – selected results from the supply model EUGAS  

E-Print Network (OSTI)

b, * This article introduces the simulation model EUGAS which allows a quantitative analysis of the long-term natural gas supply of Europe. Based on chosen parameter specifications, the simulation shows that no discernible physical gas scarcity at least for the next 20-30 years will occur in Europe. Significant investments in new production and transport facilities will be necessary during the next decades. Diversification of supplies and political considerations will have a significant impact on the development of new natural gas resources. Possibly, a new built gas cartel similar to the OPEC may modify the gas supply pattern of Europe.

J. Perner A; A. Seeliger

2003-01-01T23:59:59.000Z

352

Isobutane ignition delay time measurements at high pressure and detailed chemical kinetic simulations  

SciTech Connect

Rapid compression machine and shock-tube ignition experiments were performed for real fuel/air isobutane mixtures at equivalence ratios of 0.3, 0.5, 1, and 2. The wide range of experimental conditions included temperatures from 590 to 1567 K at pressures of approximately 1, 10, 20, and 30 atm. These data represent the most comprehensive set of experiments currently available for isobutane oxidation and further accentuate the complementary attributes of the two techniques toward high-pressure oxidation experiments over a wide range of temperatures. The experimental results were used to validate a detailed chemical kinetic model composed of 1328 reactions involving 230 species. This mechanism has been successfully used to simulate previously published ignition delay times as well. A thorough sensitivity analysis was performed to gain further insight to the chemical processes occurring at various conditions. Additionally, useful ignition delay time correlations were developed for temperatures greater than 1025 K. Comparisons are also made with available isobutane data from the literature, as well as with 100% n-butane and 50-50% n-butane-isobutane mixtures in air that were presented by the authors in recent studies. In general, the kinetic model shows excellent agreement with the data over the wide range of conditions of the present study. (author)

Healy, D.; Curran, H.J. [Combustion Chemistry Centre, School of Chemistry, NUI Galway (Ireland); Donato, N.S.; Aul, C.J.; Petersen, E.L. [Department of Mechanical Engineering, Texas A and M University, College Station, TX (United States); Zinner, C.M. [Mechanical, Materials and Aerospace Engineering, University of Central Florida, Orlando, FL (United States); Bourque, G. [Rolls-Royce Canada Limited, 9500 Cote de Liesse, Lachine, Quebec (Canada)

2010-08-15T23:59:59.000Z

353

Pressure Calculation in Polar and Charged Systems using Ewald Summation Results for the Extended Simple Point Charge Model of Water  

E-Print Network (OSTI)

Ewald summation and physically equivalent methods such as particle-mesh Ewald, kubic-harmonic expansions, or Lekner sums are commonly used to calculate long-range electrostatic interactions in computer simulations of polar and charged substances. The calculation of pressures in such systems is investigated. We find that the virial and thermodynamic pressures differ because of the explicit volume dependence of the effective, resummed Ewald potential. The thermodynamic pressure, obtained from the volume derivative of the Helmholtz free energy, can be expressed easily for both ionic and rigid molecular systems. For a system of rigid molecules, the electrostatic energy and the forces at the atom positions are required, both of which are readily available in molecular dynamics codes. We then calculate the virial and thermodynamic pressures for the extended simple point charge (SPC/E) water model at standard conditions. We find that the thermodynamic pressure exhibits considerably less system size dependence than t...

Hummer, G; Neumann, M; Hummer, Gerhard; Gr{ø}nbech-Jensen, Niels; Neumann, Martin

1998-01-01T23:59:59.000Z

354

Pressure Calculation in Polar and Charged Systems using Ewald Summation: Results for the Extended Simple Point Charge Model of Water  

E-Print Network (OSTI)

Ewald summation and physically equivalent methods such as particle-mesh Ewald, kubic-harmonic expansions, or Lekner sums are commonly used to calculate long-range electrostatic interactions in computer simulations of polar and charged substances. The calculation of pressures in such systems is investigated. We find that the virial and thermodynamic pressures differ because of the explicit volume dependence of the effective, resummed Ewald potential. The thermodynamic pressure, obtained from the volume derivative of the Helmholtz free energy, can be expressed easily for both ionic and rigid molecular systems. For a system of rigid molecules, the electrostatic energy and the forces at the atom positions are required, both of which are readily available in molecular dynamics codes. We then calculate the virial and thermodynamic pressures for the extended simple point charge (SPC/E) water model at standard conditions. We find that the thermodynamic pressure exhibits considerably...

Gerhard Hummer; Niels Grønbech-Jensen; Martin Neumann

1998-01-01T23:59:59.000Z

355

High Precision Geophysics & Detailed Structural Exploration & Slim Well  

Open Energy Info (EERE)

Precision Geophysics & Detailed Structural Exploration & Slim Well Precision Geophysics & Detailed Structural Exploration & Slim Well Drilling Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title High Precision Geophysics & Detailed Structural Exploration & Slim Well Drilling Project Type / Topic 1 Recovery Act: Geothermal Technologies Program Project Type / Topic 2 Validation of Innovative Exploration Technologies Project Description Existing geologic data show that the basalt has been broken by complex intersecting fault zones at the hot springs. Natural state hot water flow patterns in the fracture network will be interpreted from temperature gradient wells and then tested with moderate depth core holes. Production and injection well tests of the core holes will be monitored with an innovative combination of Flowing Differential Self-Potential (FDSP) and resistivity tomography surveys. The cointerpretation of all these highly detailed geophysical methods sensitive to fracture permeability patterns and water flow during the well tests will provide unprecedented details on the structures and flow in a shallow geothermal aquifer and support effective development of the low temperature reservoir and identification of deep up flow targets.

356

A Fractal Interfacial Entrainment Model for Dry Convective Boundary Layers. Part II: Discussion of Model Behavior and Comparison with Other Models  

Science Conference Proceedings (OSTI)

Details of the fractal interfacial entrainment (FIE) model recently presented by Kamada are compared to those of previous models, water tank results, and atmospheric data from the Wangara experiment. Effects of capping inversion resolution and ...

Ray F. Kamada

1988-09-01T23:59:59.000Z

357

Detailed Planning Kicks Off | OpenEI Community  

Open Energy Info (EERE)

Detailed Planning Kicks Off Detailed Planning Kicks Off Home > Groups > Linked Open Data Workshop in Washington, D.C. Jweers's picture Submitted by Jweers(83) Contributor 27 September, 2012 - 06:53 planning Skype call this morning to discuss details. More info coming soon! Groups: Linked Open Data Workshop in Washington, D.C. Login to post comments Jweers's blog Latest blog posts Jweers Event Planning Page Updated! Posted: 27 Sep 2012 - 18:38 by Jweers Jweers Added Public Promotional Page! Posted: 27 Sep 2012 - 18:10 by Jweers 1 of 2 ›› Groups Menu You must login in order to post into this group. Latest blog post comments No comments have been made yet Recent content LOD Workshop Invitation LOD Workshop Invitation Event Planning Page Updated! Added Public Promotional Page! Notes from the Call

358

Detailed chemical characterization of unresolved complex mixtures in  

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

Detailed chemical characterization of unresolved complex mixtures in Detailed chemical characterization of unresolved complex mixtures in atmospheric organics: Insights into emission sources, atmospheric processing, and secondary organic aerosol formation Title Detailed chemical characterization of unresolved complex mixtures in atmospheric organics: Insights into emission sources, atmospheric processing, and secondary organic aerosol formation Publication Type Journal Article Year of Publication 2013 Authors Chan, Arthur W. H., Gabriel Isaacman, Kevin R. Wilson, David R. Worton, Christopher R. Ruehl, Theodora Nah, Drew R. Gentner, Timothy R. Dallmann, Thomas W. Kirchstetter, Robert A. Harley, Jessica B. Gilman, William C. Kuster, Joost A. de Gouw, John H. Offenberg, Tadeusz E. Kleindienst, Ying H. Lin, Caitlin L. Rubitschun, Jason D. Surratt, Patrick L. Hayes, Jose L. Jimenez, and Allen H. Goldstein

359

Two Studies Reveal Details of Lithium-Battery Function  

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

Two Studies Reveal Details of Lithium-Battery Function Print Two Studies Reveal Details of Lithium-Battery Function Print Our way of life is deeply intertwined with battery technologies that have enabled a mobile revolution powering cell phones, laptops, medical devices, and cars. As conventional lithium-ion batteries approach their theoretical energy-storage limits, new technologies are emerging to address the long-term energy-storage improvements needed for mobile systems, electric vehicles in particular. Battery performance depends on the dynamics of evolving electronic and chemical states that, despite advances in material synthesis and structural probes, remain elusive and largely unexplored. At Beamlines 8.0.1 and 9.3.2, researchers studied lithium-ion and lithium-air batteries, respectively, using soft x-ray spectroscopy techniques. The detailed information they obtained about the evolution of electronic and chemical states will be indispensable for understanding and optimizing better battery materials.

360

Part 5: For Detailed Information | Department of Energy  

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

5: For Detailed Information 5: For Detailed Information Part 5: For Detailed Information 42 U.S.C. §9601 et. seq., The Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) of 1980, as amended by the Superfund Amendments and Reauthorization Act of 1986 (SARA) 40 CFR Part 300, National Oil and Hazardous Substance Pollution Contingency Plan (NCP) (March 1990) Executive Order 12580: Superfund Implementation DOE Order 5400.4: CERCLA Requirements Policy on Decommissioning of Department of Energy Facilities Under CERCLA (May 22, 1995) Decommissioning Implementation Guide (May 1995) Guidance on Accelerating CERCLA Environmental Restoration at Federal Facilities (August 1994) This question and Answer Sheet is designed to provide answers to common questions regarding decommissioning under CERCLA. If you have questions or

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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

Idaho's Advanced Mixed Waste Treatment Project Details 2013  

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

Idaho's Advanced Mixed Waste Treatment Project Details 2013 Idaho's Advanced Mixed Waste Treatment Project Details 2013 Accomplishments Idaho's Advanced Mixed Waste Treatment Project Details 2013 Accomplishments December 24, 2013 - 12:00pm Addthis IDAHO FALLS, Idaho - EM and its contractor, Idaho Treatment Group (ITG), safely and compliantly met all of their production and shipping targets in the Advanced Mixed Waste Treatment Project (AMWTP) at the Idaho site in 2013. AMWTP's purpose is to safely process and dispose of transuranic (TRU) and mixed low-level waste (MLLW). The defense-related TRU waste is sent to the Waste Isolation Pilot Plant in New Mexico, and the MLLW is sent to other federal and commercial disposal sites. AMWTP is the largest shipper of contact-handled TRU waste to WIPP. In 2013, AMWTP sent 2,444.69 cubic

362

Idaho's Advanced Mixed Waste Treatment Project Details 2013  

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

Idaho's Advanced Mixed Waste Treatment Project Details 2013 Idaho's Advanced Mixed Waste Treatment Project Details 2013 Accomplishments Idaho's Advanced Mixed Waste Treatment Project Details 2013 Accomplishments December 24, 2013 - 12:00pm Addthis IDAHO FALLS, Idaho - EM and its contractor, Idaho Treatment Group (ITG), safely and compliantly met all of their production and shipping targets in the Advanced Mixed Waste Treatment Project (AMWTP) at the Idaho site in 2013. AMWTP's purpose is to safely process and dispose of transuranic (TRU) and mixed low-level waste (MLLW). The defense-related TRU waste is sent to the Waste Isolation Pilot Plant in New Mexico, and the MLLW is sent to other federal and commercial disposal sites. AMWTP is the largest shipper of contact-handled TRU waste to WIPP. In 2013, AMWTP sent 2,444.69 cubic

363

Two Studies Reveal Details of Lithium-Battery Function  

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

Two Studies Reveal Details of Lithium-Battery Function Print Two Studies Reveal Details of Lithium-Battery Function Print Our way of life is deeply intertwined with battery technologies that have enabled a mobile revolution powering cell phones, laptops, medical devices, and cars. As conventional lithium-ion batteries approach their theoretical energy-storage limits, new technologies are emerging to address the long-term energy-storage improvements needed for mobile systems, electric vehicles in particular. Battery performance depends on the dynamics of evolving electronic and chemical states that, despite advances in material synthesis and structural probes, remain elusive and largely unexplored. At Beamlines 8.0.1 and 9.3.2, researchers studied lithium-ion and lithium-air batteries, respectively, using soft x-ray spectroscopy techniques. The detailed information they obtained about the evolution of electronic and chemical states will be indispensable for understanding and optimizing better battery materials.

364

Nonmonotonic Relaxation as a Result of Spatial Heterogeneity in the Model of In-series Blocks Chain  

E-Print Network (OSTI)

Recently the materials possessing structure of molecular and supramolecular matrix are more and more actively studied. They are relative to many polymeric materials of a technological origin, such as rubber, and living biological tissues. Processes of mechanical deformation of these continuous media have peculiarities connected, first, with accounting for internal friction and dissipation of energy, and secondly, with nonlinearity of their elastic and viscous properties, that is with violation of Hook and Newtons laws. Traditional approaches to mechanics of viscoelastic bodies sometimes are excessively difficult, and more evident and available representations are necessary. The invaluable role in studying of the operating processes mechanisms of elastic deformation and motility of biological materials is played by the mathematical modeling. New effect obtained by means of computer experiment of nonmonotonic relaxation of deformation in heterogeneous media is considered in the present work. Rheological properties of described media are governed by the differential equations of the first order on time (the evolution equations), as well as a huge variety of other physical processes. The physical phenomena in nonlinear systems with dissipation have a big community, including such it would seem far areas, as dynamics of magnetization in ferrite. Therefore the problem of studying new effects of viscous friction in the conditions of nonlinearity and heterogeneity, is very actual as in respect of fundamental research nonlinear and non-uniform environments, and in many areas of materials science, design of new materials, engineering of biological substitutes of living tissues and development of the micromagnetic devices using essentially new opportunities.

A. A. Bedulina; A. V. Kobelev

2013-06-25T23:59:59.000Z

365

Pressure Calculation in Polar and Charged Systems using Ewald Summation: Results for the Extended Simple Point Charge Model of Water  

E-Print Network (OSTI)

Ewald summation and physically equivalent methods such as particle-mesh Ewald, kubic-harmonic expansions, or Lekner sums are commonly used to calculate long-range electrostatic interactions in computer simulations of polar and charged substances. The calculation of pressures in such systems is investigated. We find that the virial and thermodynamic pressures differ because of the explicit volume dependence of the effective, resummed Ewald potential. The thermodynamic pressure, obtained from the volume derivative of the Helmholtz free energy, can be expressed easily for both ionic and rigid molecular systems. For a system of rigid molecules, the electrostatic energy and the forces at the atom positions are required, both of which are readily available in molecular dynamics codes. We then calculate the virial and thermodynamic pressures for the extended simple point charge (SPC/E) water model at standard conditions. We find that the thermodynamic pressure exhibits considerably less system size dependence than the virial pressure. From an analysis of the cross correlation between the virial and thermodynamic pressure, we conclude that the thermodynamic pressure should be used to drive volume fluctuations in constant-pressure simulations.

Gerhard Hummer; Niels Grønbech-Jensen; Martin Neumann

1998-06-23T23:59:59.000Z

366

Pressure calculation in polar and charged systems using Ewald summation: Results for the extended simple point charge model of water  

SciTech Connect

Ewald summation and physically equivalent methods such as particle-mesh Ewald, kubic-harmonic expansions, or Lekner sums are commonly used to calculate long-range electrostatic interactions in computer simulations of polar and charged substances. The calculation of pressures in such systems is investigated. We find that the virial and thermodynamic pressures differ because of the explicit volume dependence of the effective, resummed Ewald potential. The thermodynamic pressure, obtained from the volume derivative of the Helmholtz free energy, can be expressed easily for both ionic and rigid molecular systems. For a system of rigid molecules, the electrostatic energy and the forces at the atom positions are required, both of which are readily available in molecular dynamics codes. We then calculate the virial and thermodynamic pressures for the extended simple point charge (SPC/E) water model at standard conditions. We find that the thermodynamic pressure exhibits considerably less system size dependence than the virial pressure. From an analysis of the cross correlation between the virial and thermodynamic pressure, we conclude that the thermodynamic pressure should be used to drive volume fluctuations in constant-pressure simulations. {copyright} {ital 1998 American Institute of Physics.}

Hummer, G.; Gro/nbech-Jensen, N. [Theoretical Division, MS K710, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Neumann, M. [Institut fuer Experimentalphysik, Universitaet Wien, A-1090 Vienna (Austria)] [Institut fuer Experimentalphysik, Universitaet Wien, A-1090 Vienna (Austria)

1998-08-01T23:59:59.000Z

367

EPRI/C-E PWR Safety Valve Test Report Volume 3: Test Results for Dresser Safety Valve Model 31739A  

Science Conference Proceedings (OSTI)

EPRI at the request of the PWR utilities developed an overall program for the testing of PWR primary system safety and relief valves. This program was in response to NUREG 0578 Item 2.1.2 and NUREG 0737 Item II.D.1.A requirements. This report documents the results of safety valve testing performed as part of the overall program at the EPRI/C-E Valve Test Facility located at Combustion Engineering's Kreisinger Development Laboratory, Windsor, Connecticut. Seven safety valves representative of those utiliz...

1983-02-01T23:59:59.000Z

368

FAQ Detail | U.S. DOE Office of Science (SC)  

Office of Science (SC) Website

ASCR ASCR Leadership Computing Challenge (ALCC) » FAQ Detail Advanced Scientific Computing Research (ASCR) ASCR Home About Research Facilities Accessing ASCR Supercomputers Oak Ridge Leadership Computing Facility (OLCF) Argonne Leadership Computing Facility (ALCF) National Energy Research Scientific Computing Center (NERSC) Energy Sciences Network (ESnet) Research & Evaluation Prototypes (REP) Innovative & Novel Computational Impact on Theory and Experiment (INCITE) ASCR Leadership Computing Challenge (ALCC) ALCC Application Details ALCC Past Awards Frequently Asked Questions Science Highlights Benefits of ASCR Funding Opportunities Advanced Scientific Computing Advisory Committee (ASCAC) News & Resources Contact Information Advanced Scientific Computing Research U.S. Department of Energy

369

The impact of detailed urban-scale processing on the composition, distribution, and radiative forcing of anthropogenic aerosols  

E-Print Network (OSTI)

Detailed urban-scale processing has not been included in global 3D chemical transport models due to its large computational demands. Here we present a metamodel for including this processing, and compare it with the use ...

Cohen, Jason Blake

370

Detailed Numerical Simulation of the Graniteville Train Collision  

SciTech Connect

An unfortunate accident occurred in Graniteville, South Carolina on 6 January, 2005 when a train carrying a variety of hazardous chemicals collided with a stationary train parked on a siding rail (spur). The Savannah River National Laboratory (SRNL) runs prognostic atmospheric simulations of the Central Savannah River Area (CSRA) on an operational basis in the event of such airborne releases. Although forecast information was provided at 2-km horizontal grid spacing during the accident response, a higher-resolution simulation was later performed to examine influences of local topography on plume migration. The Regional Atmospheric Modeling System (RAMS, version 4.3.0) was used to simulate meteorology using multiple grids with an innermost grid spacing of 125 meters. This report discusses comparisons of simulated meteorology with local observations and applications using two separate transport models. Results from the simulations are shown to generally agree with meteorological observations at the time. Use of a dense gas model to simulate localized effects indicates agreement with fatalities in the immediate area and visible damage to vegetation.

Buckley, R. L.

2005-10-24T23:59:59.000Z

371

Variable-response model of electricity demand by time of day: Results of a Wisconsin pricing experiment: Final report  

Science Conference Proceedings (OSTI)

Observationally alike households may differ in demand parameters and thus in economic quantities that are functions of those parameters. We have proposed a methodology for dealing with this variation. Estimation of both translog and CES versions of the model with data from the Wisconsin Electricity Pricing Experiment revealed considerable variation among households in time-of-day electricity consumption demand parameters for both summer and winter seasons and for several different definitions of the peak period. Observed household characteristics explained only a small share of total household differences, but permanent household differences dominated month-to-month variation in either expenditure shares or log consumption ratios in most cases. Permanent differences among households are important relative to total variation, including transitory month-to-month variation. We calculated various economic variables from the demand parameters, including the partial elasticity of substitution, compensated and uncompensated elasticities, and a measure of electricity expenditure under peak load pricing required to maintain the utility level under flat rate pricing relative to the flat rate expenditure. Because these are nonlinear functions of the household demand parameters, the mean parameter value over households with different demand parameters may be substantially different from the value of the function at mean values, under the representative household paradigm. For time-of-day electricity demand, variation among households is significant but small relative to mean parameter values. Therefore, controlling for the effect of household variation makes little difference in these mean calculations, but it does imply substantial variation among households in the welfare implications (and elasticities of response) of the introduction of time-of-day pricing. 25 refs., 12 tabs.

Lillard, L.

1987-06-01T23:59:59.000Z

372

Numerical modeling of carbon dioxide sequestration on the rate of pressure solution creep in limestone: Preliminary results  

E-Print Network (OSTI)

When carbon dioxide (CO2) is injected into an aquifer or a depleted geological reservoir, its dissolution into solution results in acidification of the pore waters. As a consequence, the pore waters become more reactive, which leads to enhanced dissolution-precipitation processes and a modification of the mechanical and hydrological properties of the rock. This effect is especially important for limestones given that the solubility and reactivity of carbonates is strongly dependent on pH and the partial pressure of CO2. The main mechanism that couples dissolution, precipitation and rock matrix deformation is commonly referred to as intergranular pressure solution creep (IPS) or pervasive pressure solution creep (PSC). This process involves dissolution at intergranular grain contacts subject to elevated stress, diffusion of dissolved material in an intergranular fluid, and precipitation in pore spaces subject to lower stress. This leads to an overall and pervasive reduction in porosity due to both grain indent...

Renard, Francois; Hellmann, Roland; Collombet, Marielle; Guen, Yvi Le

2008-01-01T23:59:59.000Z

373

Steel-framed buildings: Impacts of wall detail configurations on the whole wall thermal performance  

SciTech Connect

The main objective of this paper is the influence of architectural wall details on the whole wall thermal performance. Whole wall thermal performance analysis was performed for six light gage steel-framed wall systems (some with wood components). For each wall system, all wall details were simulated using calibrated 3-D finite difference computer modeling. The thermal performance of the six steel-framed wall systems included various system details and the whole wall system thermal performance for a typical single-story ranch house. Currently, predicted heat losses through building walls are typically based on measurements of the wall system clear wall area using test methods such as ASTM C 236 or are calculated by one of the procedures recommended in the ASHRAE Handbook of Fundamentals that often is carried out for the clear wall area exclusively. In this paper, clear wall area is defined as the part of the wall system that is free of thermal anomalies due to building envelope details or thermally unaffected by intersections with other surfaces of the building envelope. Clear wall experiments or calculations normally do not include the effects of building envelope details such as corners, window and door openings, and structural intersections with roofs, floors, ceilings, and other walls. In steel-framed wall systems, these details typically consist of much more structural components than the clear wall. For this situation, the thermal properties measured or calculated for the clear wall area do not adequately represent the total wall system thermal performance. Factors that would impact the ability of today`s standard practice to accurately predict the total wall system thermal performance are the accuracy of the calculation methods, the area of the total wall that is clear wall, and the quantity and thermal performance of the various wall system details.

Kosny, J.; Desjarlais, A.O.; Christian, J.E.

1998-06-01T23:59:59.000Z

374

Methods for Detailed Energy Data Collection of Miscellaneous and Electronic  

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

Methods for Detailed Energy Data Collection of Miscellaneous and Electronic Methods for Detailed Energy Data Collection of Miscellaneous and Electronic Loads in a Commercial Office Building Title Methods for Detailed Energy Data Collection of Miscellaneous and Electronic Loads in a Commercial Office Building Publication Type Report Refereed Designation Unknown LBNL Report Number LBNL-6384E Year of Publication 2013 Authors Lanzisera, Steven, Stephen Dawson-Haggerty, Iris H. Y. Cheung, Jay Taneja, David Culler, and Richard E. Brown Date Published 04/2013 Keywords Commercial Office Building, Data Collection, Electronic loads Abstract Miscellaneous and electronic loads (MELs) consume about 20% of the primary energy used in U.S. buildings, and this share is projected to increase for the foreseeable future. Our understanding, however, of which devices are most responsible for this energy use is still rudimentary due to the difficulty and expense of performing detailed studies on MELs and their energy use. In order to better understand the energy use of MELs and the design of MELs field metering studies, we conducted a year-long study of MELs in an 89,500 sq. ft. (8310 m2) office building.

375

Attention to detail: annotations of a design process  

Science Conference Proceedings (OSTI)

This paper takes the form of a photo essay that exposes the design process at a level of detail seldom found in traditional academic publications. With this format we document the development of a set of devices for exploring the microclimate of the ... Keywords: annotations, design process, photo essay, practice-based research

Nadine Jarvis; David Cameron; Andy Boucher

2012-10-01T23:59:59.000Z

376

Frame sequential interpolation for discrete level-of-detail rendering  

Science Conference Proceedings (OSTI)

In this paper we present a method for automatic interpolation between adjacent discrete levels of detail to achieve smooth LOD changes in image space. We achieve this by breaking the problem into two passes: We render the two LOD levels individually ...

Daniel Scherzer; Michael Wimmer

2008-06-01T23:59:59.000Z

377

Maine Yankee Decommissioning - Experience Report: Detailed Experiences 1997-2004  

Science Conference Proceedings (OSTI)

Several U.S. nuclear power plants began the decommissioning process in the 1990s. Based on current information, it will be several years before the next group of plant licenses expires, and the plants begin decommissioning. This report provides detailed information on the decommissioning of one power reactor, Maine Yankee, in order to document their experience for future plants.

2005-05-04T23:59:59.000Z

378

Technology Management Benchmark Study - Phase 2: Volume 2 - Detailed Report  

Science Conference Proceedings (OSTI)

EPRI and eleven U.S. domestic power companies participated in a benchmark study of the most successful technology management practices of leading non-utility companies. This report contains the detailed findings of the Technology Management Best Practices Study -- Phase 2 conducted from July 2001 to May 2002.

2002-06-27T23:59:59.000Z

379

EMIS Quick User Guide Search page (details on page 2)  

E-Print Network (OSTI)

search terms in foreign languages You can enter search terms in foreign languages by: - Using your: Please note that we have a Cyrillic and Arabic keyboards available through the Search page. EnteringEMIS Quick User Guide Search page (details on page 2) The News page: Access the latest news

Shoubridge, Eric

380

Supercritical Burning of Liquid Oxygen (LOX) Droplet with Detailed Chemistry  

E-Print Network (OSTI)

Supercritical Burning of Liquid Oxygen (LOX) Droplet with Detailed Chemistry J. DAOU,* P with diameter less than I pm vaporize before burning. A quasi-steady-like diffusion flame is then established is considered; temperature and pressure in the combustion chamber have a weak influence on the burning time

Heil, Matthias

Note: This page contains sample records for the topic "model results detailed" 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

Statistical modelling of tropical cyclone tracks: modelling cyclone lysis  

E-Print Network (OSTI)

We describe results from the fifth stage of a project to build a statistical model of tropical cyclone tracks. The previous stages considered genesis and the shape of tracks. We now consider in more detail how to represent the lysis (death) of tropical cyclones. Improving the lysis model turns out to bring a significant improvement to the track model overall.

Hall, T; Hall, Tim; Jewson, Stephen

2005-01-01T23:59:59.000Z

382

HIGH DETAIL STATIONARY OPTIMIZATION MODELS FOR GAS NETWORKS --PART 1: MODEL COMPONENTS.  

E-Print Network (OSTI)

SCHMIDT, MARC C. STEINBACH, BERNHARD M. WILLERT Abstract. Economic reasons and the regulation of gas markets create a growing need for mathematical optimization in natural gas networks. Real life planning after fixing discrete decisions with coarsely approximated physics. 1. Introduction Natural gas plays

Steinbach, Marc

383

A Detailed Chemical Kinetic Reaction Mechanism for Oxidation of Four Small Alkyl Esters in Laminar Premixed Flames  

Science Conference Proceedings (OSTI)

A detailed chemical kinetic reaction mechanism has been developed for a group of four small alkyl ester fuels, consisting of methyl formate, methyl acetate, ethyl formate and ethyl acetate. This mechanism is validated by comparisons between computed results and recently measured intermediate species mole fractions in fuel-rich, low pressure, premixed laminar flames. The model development employs a principle of similarity of functional groups in constraining the H atom abstraction and unimolecular decomposition reactions in each of these fuels. As a result, the reaction mechanism and formalism for mechanism development are suitable for extension to larger oxygenated hydrocarbon fuels, together with an improved kinetic understanding of the structure and chemical kinetics of alkyl ester fuels that can be extended to biodiesel fuels. Variations in concentrations of intermediate species levels in these flames are traced to differences in the molecular structure of the fuel molecules.

Westbrook, C K; Pitz, W J; Westmoreland, P R; Dryer, F L; Chaos, M; Osswald, P; Kohse-Hoinghaus, K; Cool, T A; Wang, J; Yang, B; Hansen, N; Kasper, T

2008-02-08T23:59:59.000Z

384

Buildings and Energy in the 80's -- Detailed Tables  

U.S. Energy Information Administration (EIA) Indexed Site

Detailed Tables Detailed Tables Total Residential and Commercial Primary Consumption by Type of Building Sources: Energy Information Administration, Office of Energy Markets and End Use, EIA-457 of the 1980 Residential Energy Consumption Survey and Form EIA-871 of the 1989 Commercial Buildings Energy Consumption Survey. This report introduces several innovations in energy data reporting that complement the previously published triennial reports of the Residential Energy Consumption Survey (RECS) and the Commercial Buildings Energy Consumption Survey (CBECS). (1) Both residential and commercial sector buildings data are presented together in the report. Common units of analysis, the residential or commercial building and floorspace, are used to facilitate comparison.17 (2) Unlike the triennial RECS and CBECS that

385

Department of Energy Releases Details of Tribal Summit | Department of  

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

WASHINGTON, D.C. - U.S. Department of Energy today released details of the WASHINGTON, D.C. - U.S. Department of Energy today released details of the upcoming Tribal Summit with American Indian and Alaska Native Leaders that will be held on May 4-5, 2011, at the Crystal City Gateway Marriott in Arlington, Va. The summit will build on Secretary Chu's continued commitment to partnering with Native Americans to support the development of clean energy projects on tribal lands that will help reduce energy use, limit carbon pollution, and create new jobs for tribal communities across the country "Tribal Nations are well-positioned to take advantage of the benefits of clean energy. This summit will provide an opportunity for meaningful dialogue between the Department of Energy and Tribal Nations on a broad range of energy and environmental issues," said Secretary Chu. "Working

386

ARRA870A Recovery Act - Recip Details for Next Quarter  

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

ARRA870A Recovery Act - Recipient Reporting Details" ARRA870A Recovery Act - Recipient Reporting Details" "Data is as of July, 19, 2011" "Awardee Name","Award/ Contract Number","Award Type","Award Amount","Total Costs","Total Payments","Project Value","Project Desc","DUNS Number","CFDA Code","NAICS Code","Award Date","Contracting Office Code","Awarding Agency Code","Funding Agency Code","Program Source (TAS) Code","CCR Renewal Date" "1001 SOUTH 15TH STREET ASSOCIATES, LLC","EE0002776","Grant",1682920,7277.96,7277.96,2004230,"Ground Source Heat Pumps",831221945,81.087,,"application/vnd.ms-excel",,8900,8900,"89-0331","application/vnd.ms-excel"

387

The Collagen Protein Viewed at Unprecedented Detail | Advanced Photon  

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

Assembling Nanoparticles the Easy DNA-Way Assembling Nanoparticles the Easy DNA-Way Better, cleaner fuel injectors for automobiles? Poxvirus Potency Uncovered in New Atomic Map Striking Nano Gold Oldest Known Magnet's Secrets Revealed Under High Pressures Science Highlights Archives: 2013 | 2012 | 2011 | 2010 2009 | 2008 | 2007 | 2006 2005 | 2004 | 2003 | 2002 2001 | 2000 | 1998 | Subscribe to APS Science Highlights rss feed The Collagen Protein Viewed at Unprecedented Detail FEBRUARY 26, 2008 Bookmark and Share A view of a rat tail tendon using second-harmonic generation microscopy. The collagen fibers show up in green and red. The structure and behavior of one of the most common proteins in our bodies has been resolved at a level of detail never before seen, thanks to new research performed at the Advanced Photon Source (APS) at the U.S.

388

Aerosols in a Changing Atmosphere: From Detailed Aerosol Microphysics to  

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

Aerosols in a Changing Atmosphere: From Detailed Aerosol Microphysics to Aerosols in a Changing Atmosphere: From Detailed Aerosol Microphysics to Policy Applications Speaker(s): Susanne Bauer Date: December 6, 2011 - 4:00pm Location: 90-4133 Seminar Host/Point of Contact: Surabi Menon The anthropogenic increase in aerosol concentrations since preindustrial times and its net cooling effect on the atmosphere is thought to mask some of the greenhouse gas induced warming. Although the overall effect of aerosols on solar radiation and clouds is most certainly negative, some individual forcing agents and feedbacks have positive forcing effects. Recent studies have tried to identify some of those positive forcing agents and their individual emission sectors, However, understanding the net effect of multi-source emitting sectors and the involved cloud feedbacks is

389

Third Climate Change Science Program Report Issued; Report Details Effects  

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

Third Climate Third Climate Change Science Program Report Issued; Report Details Effects of Climate Change on Energy Production and Use in the United States News Featured Articles Science Headlines 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 Presentations & Testimony News Archives Contact Information Office of Science U.S. Department of Energy 1000 Independence Ave., SW Washington, DC 20585 P: (202) 586-5430 10.18.07 Third Climate Change Science Program Report Issued; Report Details Effects of Climate Change on Energy Production and Use in the United States Print Text Size: A A A Subscribe FeedbackShare Page WASHINGTON, DC - The U.S. Climate Change Science Program (CCSP) today announced the release of its third in a series of 21 Synthesis and Assessment Products (SAPs). Coordinated by the U.S. Department of Energy

390

The influence of strange quarks on QCD phase diagram and chemical freeze-out: Results from the hadron resonance gas model  

E-Print Network (OSTI)

We confront the lattice results on QCD phase diagram for two and three flavors with the hadron resonance gas model. Taking into account the truncations in the Taylor-expansion of energy density $\\epsilon$ done on the lattice at finite chemical potential $\\mu$, we find that the hadron resonance gas model under the condition of constant $\\epsilon$ describes very well the lattice phase diagram. We also calculate the chemical freeze-out curve according to the entropy density $s$. The $s$-values are taken from lattice QCD simulations with two and three flavors. We find that this condition is excellent in reproducing the experimentally estimated parameters of the chemical freeze-out.

A. Tawfik

2004-10-25T23:59:59.000Z

391

Model Products Available  

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

Available Available Archiving environmental data products has become recognized as a vital research practice: it improves our ability to reproduce results and perform additional analyses while saving the cost of redundant data collection activities. The same rationale applies to archiving numerical models. Archived models will provide the methodological detail of numerical modeling studies to recreate published modeling results, enabling the synthesis of results across modeling studies and the investigation of new hypotheses. In addition, archived models will allow determination of uncertainties for comparison with results from other models in assessment / policy studies. The model source code will also allow others to see how models treat individual processes. We are creating a two-tiered archive for numerical models. The first tier

392

DOE Makes Public Detailed Information on the BP Oil Spill | Department of  

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

Makes Public Detailed Information on the BP Oil Spill Makes Public Detailed Information on the BP Oil Spill DOE Makes Public Detailed Information on the BP Oil Spill June 8, 2010 - 12:00am Addthis WASHINGTON - As part of the Obama Administration's ongoing commitment to transparency surrounding the response to the BP oil spill, U.S. Energy Secretary Steven Chu announced today that Department is providing online access to schematics, pressure tests, diagnostic results and other data about the malfunctioning blowout preventer. Secretary Chu insisted on making the data widely available to ensure the public is as informed as possible, and to ensure that outside experts making recommendations have access to the same information that BP and the government have. The site will be updated with additional data soon. "Transparency is not only in the public interest, it is part of the

393

Parameterization of Outgoing Infrared Radiation Derived from Detailed Radiative Calculations  

Science Conference Proceedings (OSTI)

State-of-the-art radiative transfer models can calculate outgoing infrared (IR) irradiance at the top of the atmosphere (F) to an accuracy suitable for climate modeling given the proper atmospheric profiles of temperature and absorbing gases and ...

Starley L. Thompson; Stephen G. Warren

1982-12-01T23:59:59.000Z

394

Global and Convex Optimization in Modeling Environments ...  

E-Print Network (OSTI)

Aug 12, 2002 ... This model is a frequently used classical GO test ..... The results are automatically written to a summary and a detailed report file. ..... radiated acoustic power, delivered to the radiation resistance Rr, to input electric power.

395

COBE Tutorial and Recent Results  

E-Print Network (OSTI)

Some of the technical details involved in taking and analyzing data from COBE are discussed, and recent results from the FIRAS and DMR experiments are summarized. Some of the cosmological implications of these recent data are presented.

Edward L. Wright

1994-07-20T23:59:59.000Z

396

List of Portfolio Manager property types, definitions, and use details |  

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

List of Portfolio Manager property types, definitions, and use List of Portfolio Manager property types, definitions, and use details Secondary menu About us Press room Contact Us Portfolio Manager Login Facility owners and managers Existing buildings Commercial new construction Industrial energy management Small business Service providers Service and product providers Verify applications for ENERGY STAR certification Design commercial buildings Energy efficiency program administrators Commercial and industrial program sponsors Associations State and local governments Federal agencies Tools and resources Training In This Section Campaigns Commercial building design Communications resources Energy management guidance Financial resources Portfolio Manager Products and purchasing Recognition Research and reports Service and product provider (SPP) resources

397

Energy-conserving and passive-solar construction details  

DOE Green Energy (OSTI)

Diagrams are presented which show construction details for insulating foundations, walls, joists, roofs, and other components of energy-conserving residential and light commercial buildings; glazing systems; installing thermal mass; rock beds; and a passive hot air collector. The emphasis is on using commercially available building materials in new applications to minimize costs and maximize thermal design. The costs are given which are typical of what builders have incurred in different parts of the country. The thermal performance figures and comments are included. (LEW)

Taylor, R D

1981-04-01T23:59:59.000Z

398

SOLAR MIXTURE OPACITY CALCULATIONS USING DETAILED CONFIGURATION AND LEVEL ACCOUNTING TREATMENTS  

Science Conference Proceedings (OSTI)

An opacity model (OPAS) combining detailed configuration and level accounting treatments has been developed to calculate radiative opacity of plasmas in local thermodynamic equilibrium. The model is presented and used to compute spectral opacities of a solar mixture. Various density-temperature couples have been considered from the solar center up to the vicinity of the radiative/convective zone interface. For a given solar thermodynamic path, OPAS calculations are compared to Opacity Project (OP) and OPAL data. Rosseland mean opacity values are in very good agreement over all the considered solar thermodynamic path, while OPAS and OP spectral opacities of each element may vary considerably. Main sources of discrepancy are discussed.

Blancard, Christophe; Cosse, Philippe; Faussurier, Gerald [CEA, DAM, DIF, F-91297 Arpajon (France)

2012-01-20T23:59:59.000Z

399

Accelerating the Computation of Detailed Chemical Reaction Kinetics for Simulating Combustion of Complex Fuels  

Science Conference Proceedings (OSTI)

Combustion of hydrocarbon fuels has been a very challenging scientific and engineering problem due to the complexity of turbulent flows and hydrocarbon reaction kinetics. There is an urgent need to develop an efficient modeling capability to accurately predict the combustion of complex fuels. Detailed chemical kinetic models for the surrogates of fuels such as gasoline, diesel and JP-8 consist of thousands of chemical species and Arrhenius reaction steps. Oxygenated fuels such as bio-fuels and heavier hydrocarbons, such as from newer fossil fuel sources, are expected to have a much more complex chemistry requiring increasingly larger chemical kinetic models. Such models are beyond current computational capability, except for homogeneous or partially stirred reactor type calculations. The advent of highly parallel multi-core processors and graphical processing units (GPUs) promises a steep increase in computational performance in the coming years. This paper will present a software framework that translates the detailed chemical kinetic models to high-performance code targeted for GPU accelerators.

Sankaran, R.; Grout, R.

2012-01-01T23:59:59.000Z

400

Accelerating the Computation of Detailed Chemical Reaction Kinetics for Simulating Combustion of Complex Fuels  

Science Conference Proceedings (OSTI)

Combustion of hydrocarbon fuels has been a very challenging scientific and engineering problem due to the complexity of turbulent flows and hydrocarbon reaction kinetics. There is an urgent need to develop an efficient modeling capability to accurately predict the combustion of complex fuels. Detailed chemical kinetic models for the surrogates of fuels such as gasoline, diesel and JP-8 consist of thousands of chemical species and Arrhenius reaction steps. Oxygenated fuels such as bio-fuels and heavier hydrocarbons, such as from newer fossil fuel sources, are expected to have a much more complex chemistry requiring increasingly larger chemical kinetic models. Such models are beyond current computational capability, except for homogeneous or partially stirred reactor type calculations. The advent of highly parallel multi-core processors and graphical processing units (GPUs) promises a steep increase in computational performance in the coming years. This paper will present a software framework that translates the detailed chemical kinetic models to high- performance code targeted for GPU accelerators.

Grout, Ray W [ORNL

2012-01-01T23:59:59.000Z

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


401

RESRAD-RECYCLE : a computer model for analyzing radiation exposures resulting from recycling radioactively contaminated scrap metals or reusing ratioactively surface-contaminated materials and equipment.  

Science Conference Proceedings (OSTI)

RESRAD-RECYCLE is a computer code designed by Argonne National Laboratory (ANL) to be used in making decisions about the disposition of radioactively contaminated materials and scrap metals. It implements a pathway analysis methodology to evaluate potential radiation exposures resulting from the recycling of contaminated scrap metals and the reuse of surface-contaminated materials and equipment. For modeling purposes, it divides the entire metal recycling process into six steps: (1) scrap delivery, (2) scrap melting, (3) ingot delivery, (4) product fabrication, (5) product distribution, and (6) use of finished product. RESRAD-RECYCLE considers the reuse of surface-contaminated materials in their original forms. It contains representative exposure scenarios for each recycling step and the reuse process; users can also specify scenarios if desired. The model calculates individual and collective population doses for workers involved in the recycling process and for the public using the finished products. The results are then used to derive clearance levels for the contaminated materials on the basis of input dose restrictions. The model accounts for radiological decay and ingrowth, dilution and partitioning during melting, and distribution of refined metal in the various finished products, as well as the varying densities and geometries of the radiation sources during the recycling process. A complete material balance in terms of mass and radioactivity during the recycling process can also be implemented. In an international validation study, the radiation doses calculated by RESRAD-RECYCLE were shown to agree fairly well with actual measurement data.

Cheng, J. J.; Kassas, B.; Yu, C.; Arnish, J. J.; LePoire, D.; Chen, S.-Y.; Williams, W. A.; Wallo, A.; Peterson, H.; Environmental Assessment; DOE; Univ. of Texas

2004-11-01T23:59:59.000Z

402

Diffusive transport without detailed balance in motile bacteria: Does microbiology need statistical physics?  

E-Print Network (OSTI)

Microbiology is the science of microbes, particularly bacteria. Many bacteria are motile: they are capable of self-propulsion. Among these, a significant class execute so-called run-and-tumble motion: they follow a fairly straight path for a certain distance, then abruptly change direction before repeating the process. This dynamics has something in common with Brownian motion (it is diffusive at large scales), and also something in contrast. Specifically, motility parameters such as the run speed and tumble rate depend on the local environment and hence can vary in space. When they do so, even if a steady state is reached, this is not generally invariant under time-reversal: the principle of detailed balance, which restores the microscopic time-reversal symmetry of systems in thermal equilibrium, is mesoscopically absent in motile bacteria. This lack of detailed balance (allowed by the flux of chemical energy that drives motility) creates pitfalls for the unwary modeller. Here I review some statistical mechanical models for bacterial motility, presenting them as a paradigm for exploring diffusion without detailed balance. I also discuss the extent to which statistical physics is useful in understanding real or potential microbiological experiments.

M. E. Cates

2012-08-20T23:59:59.000Z

403

The Role of Comprehensive Detailed Chemical Kinetic Reaction Mechanisms in Combustion Research  

Science Conference Proceedings (OSTI)

Recent developments by the authors in the field of comprehensive detailed chemical kinetic reaction mechanisms for hydrocarbon fuels are reviewed. Examples are given of how these mechanisms provide fundamental chemical insights into a range of combustion applications. Practical combustion consists primarily of chemical heat release from reactions between a fuel and an oxidizer, and computer simulations of practical combustion systems have become an essential tool of combustion research (Westbrook et al., 2005). At the heart of most combustion simulations, the chemical kinetic submodel frequently is the most detailed, complex and computationally costly part of a system model. Historically, the chemical submodel equations are solved using time-implicit numerical algorithms, due to the extreme stiffness of the coupled rate equations, with a computational cost that varies roughly with the cube of the number of chemical species in the model. While early mechanisms (c. 1980) for apparently simple fuels such as methane (Warnatz, 1980) or methanol (Westbrook and Dryer, 1979) included perhaps 25 species, current detailed mechanisms for much larger, more complex fuels such as hexadecane (Fournet et al., 2001; Ristori et al., 2001; Westbrook et al., 2008) or methyl ester methyl decanoate (Herbinet et al., 2008) have as many as 2000 or even 3000 species. Rapid growth in capabilities of modern computers has been an essential feature in this rapid growth in the size and complexity of chemical kinetic reaction mechanisms.

Westbrook, C K; Pitz, W J; Curran, H J; Mehl, M

2008-07-16T23:59:59.000Z

404

Department of Energy Releases Details of Tribal Summit | Department of  

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

WASHINGTON, D.C. - U.S. Department of Energy today released details of the upcoming Tribal Summit with American Indian and Alaska Native Leaders that will be held on May 4-5, 2011, at the Crystal City Gateway Marriott in Arlington, Va. The summit will build on Secretary Chu's continued commitment to partnering with Native Americans to support the development of clean energy projects on tribal lands that will help reduce energy use, limit carbon pollution, and create new jobs for tribal communities across the country. "Tribal Nations are well-positioned to take advantage of the benefits of clean energy. This summit will provide an opportunity for meaningful dialogue between the Department of Energy and Tribal Nations on a broad range of energy and environmental issues," said Secretary Chu. "Working

405

Search Results  

Science Conference Proceedings (OSTI)

Search Results. CAS Number, Formula, Name, State, JANAF Table, Links. 7439-97-6, Hg, Mercury, ref, view, ... 7439-97-6, Hg, Mercury, cr,l, view, ...

406

Search Results  

Science Conference Proceedings (OSTI)

Search Results. CAS Number, Formula, Name, State, JANAF Table, Links. 7440-33-7, W, Tungsten, cr,l, view, ... 7440-33-7, W, Tungsten, cr, view, ...

407

GLODAP Results  

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

Results Evaluation of Inorganic Carbon Quality Carbon Thermodynamics Anthropogenic CO2 Radio Carbon Gridded Carbon Fields Click the map to enlarge. Indian Ocean Pacific Ocean...

408

Turbidity Determination from Broadband Irradiance Measurements: A Detailed Multicoefficient Approach  

Science Conference Proceedings (OSTI)

A physically modeled method is presented to obtain accurate turbidity determinations from broadband direct irradiance measurements. The method uses parameterizations of various extinction processes affecting the transfer of shortwave radiation in ...

Christian A. Gueymard

1998-04-01T23:59:59.000Z

409

Comparison and validation of HEU and LEU modeling results to HEU experimental benchmark data for the Massachusetts Institute of Technology MITR reactor.  

Science Conference Proceedings (OSTI)

The Massachusetts Institute of Technology Reactor (MITR-II) is a research reactor in Cambridge, Massachusetts designed primarily for experiments using neutron beam and in-core irradiation facilities. It delivers a neutron flux comparable to current LWR power reactors in a compact 6 MW core using Highly Enriched Uranium (HEU) fuel. In the framework of its non-proliferation policies, the international community presently aims to minimize the amount of nuclear material available that could be used for nuclear weapons. In this geopolitical context, most research and test reactors both domestic and international have started a program of conversion to the use of Low Enriched Uranium (LEU) fuel. A new type of LEU fuel based on an alloy of uranium and molybdenum (UMo) is expected to allow the conversion of U.S. domestic high performance reactors like the MITR-II reactor. Towards this goal, comparisons of MCNP5 Monte Carlo neutronic modeling results for HEU and LEU cores have been performed. Validation of the model has been based upon comparison to HEU experimental benchmark data for the MITR-II. The objective of this work was to demonstrate a model which could represent the experimental HEU data, and therefore could provide a basis to demonstrate LEU core performance. This report presents an overview of MITR-II model geometry and material definitions which have been verified, and updated as required during the course of validation to represent the specifications of the MITR-II reactor. Results of calculations are presented for comparisons to historical HEU start-up data from 1975-1976, and to other experimental benchmark data available for the MITR-II Reactor through 2009. This report also presents results of steady state neutronic analysis of an all-fresh LEU fueled core. Where possible, HEU and LEU calculations were performed for conditions equivalent to HEU experiments, which serves as a starting point for safety analyses for conversion of MITR-II from the use of HEU fuel to the use of UMo LEU fuel.

Newton, T. H.; Wilson, E. H; Bergeron, A.; Horelik, N.; Stevens, J. (Nuclear Engineering Division); (MIT Nuclear Reactor Lab.)

2011-03-02T23:59:59.000Z

410

SEARCH RESULTS  

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

Home | search results Please enter one or more search words. ADVANCED SEARCH with all the words with the exact phrase with at least one of the words without the words File Format...

411

CRSP South Capital Investment Plan FY12-FY21 Detail  

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

9/2011 9/2011 CRSP South Capital Investment Plan FY12-FY21 Detail Yellow Highlight = New Project to list W Total = Western Only Costs Red Text = Change from previous version O Total = Trust and Joint Participation Costs Blue Text = will be removed from list FY Total = Sum of W Total and O Total Green Highlight = Annual Equipment Replacement Programs MPS Split = Multiple Power System Cost Split. Fund PROJECT PROJECT Power Sys TOTAL W Total W PD W Non-PD O Total FY TOTAL W Total W PD W Non-PD O Total FY TOTAL Transmission Lines Environmental Support for Lands, Access Roads, and ROW's CRSPVMF 450 110 10 100 110 110 10 100 110 Lidar Closeout at Pinnacle Peak and Rogers CRSPVMF 15 15 15 15 Pinnacle Peak-Rogers ROW Agreement CRSPVMF 6,100 6,100 100 6,000 6,100 T-Line SubTotal 6,565 125 25 100 125 6,210 110

412

Quality Guidelines for Energy System Studies: Detailed Coal Specifications  

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

Q Q U U A A L L I I T T Y Y G G U U I I D D E E L L I I N N E E S S F F O O R R E E N N E E R R G G Y Y S S Y Y S S T T E E M M S S T T U U D D I I E E S S D D e e t t a a i i l l e e d d C C o o a a l l S S p p e e c c i i f f i i c c a a t t i i o o n n s s DOE/NETL-2010/???? DOE/NETL-401/012111 National Energy Technology Laboratory Office of Program Planning and Analysis 2 January 2012 Detailed Coal Specifications Quality Guidelines for Energy System Studies Disclaimer This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights.

413

Halving the Casimir force with conductive oxides: Experimental details  

SciTech Connect

This work is an extended version of a paper published previously [S. de Man et al., Phys. Rev. Lett. 103, 040402 (2009)], where we presented measurements of the Casimir force between a gold-coated sphere and a plate coated with either gold or an indium tin oxide (I TO) layer. The experiment, which was performed in air, showed that I TO conducts sufficiently to prevent charge accumulation but is still transparent enough to halve the Casimir attraction when compared to gold. Here we report all the experimental details that, owing to the limited space available, were omitted in the previous article. We discuss the performance of our setup in terms of stability of the calibration procedure and reproducibility of the Casimir force measurement. We also introduce and demonstrate a technique to obtain the spring constant of our force sensor. Furthermore, we present a thorough description of the experimental method, a comprehensive explanation of data elaboration and error analysis, and a complete characterization of the dielectric function and of the surface roughness of the samples used in the actual experiment.

Man, S. de; Heeck, K.; Iannuzzi, D. [Department of Physics and Astronomy and LaserLaB, VU University Amsterdam, De Boelelaan 1081, NL-1081 HV Amsterdam (Netherlands)

2010-12-15T23:59:59.000Z

414

Halving the Casimir force with conductive oxides: experimental details  

E-Print Network (OSTI)

This work is an extended version of a paper published last year in Physical Review Letters [S. de Man et al., Phys. Rev. Lett. 103, 040402 (2009)], where we presented measurements of the Casimir force between a gold coated sphere and a plate coated with either gold or an indium-tin-oxide (ITO) layer. The experiment, which was performed in air, showed that ITO is sufficiently conducting to prevent charge accumulation, but still transparent enough to halve the Casimir attraction when compared to gold. Here, we report all the experimental details that, due to the limited space available, were omitted in the previous article. We discuss the performance of our setup in terms of stability of the calibration procedure and reproducibility of the Casimir force measurement. We also introduce and demonstrate a new technique to obtain the spring constant of our force sensor. Furthermore, we present a thorough description of the experimental method, a comprehensive explanation of data elaboration and error analysis, and a...

de Man, Sven; Iannuzzi, Davide

2010-01-01T23:59:59.000Z

415

A thermoacoustic-Stirling heat engine: Detailed study  

SciTech Connect

A new type of thermoacoustic engine based on traveling waves and ideally reversible heat transfer is described. Measurements and analysis of its performance are presented. This new engine outperforms previous thermoacoustic engines, which are based on standing waves and intrinsically irreversible heat transfer, by more than 50%. At its most efficient operating point, it delivers 710 W of acoustic power to its resonator with a thermal efficiency of 0.30, corresponding to 41% of the Carnot efficiency. At its most powerful operating point, it delivers 890 W to its resonator with a thermal efficiency of 0.22. The efficiency of this engine can be degraded by two types of acoustic streaming. These are suppressed by appropriate tapering of crucial surfaces in the engine and by using additional nonlinearity to induce an opposing time-averaged pressure difference. Data are presented which show the nearly complete elimination of the streaming convective heat loads. Analysis of these and other irreversibilities show which components of the engine require further research to achieve higher efficiency. Additionally, these data show that the dynamics and acoustic power flows are well understood, but the details of the streaming suppression and associated heat convection are only qualitatively understood. (c) 2000 Acoustical Society of America.

Backhaus, S. [Condensed Matter and Thermal Physics Group, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Swift, G. W. [Condensed Matter and Thermal Physics Group, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

2000-06-01T23:59:59.000Z

416

n-Butane: Ignition delay measurements at high pressure and detailed chemical kinetic simulations  

Science Conference Proceedings (OSTI)

Ignition delay time measurements were recorded at equivalence ratios of 0.3, 0.5, 1, and 2 for n-butane at pressures of approximately 1, 10, 20, 30 and 45 atm at temperatures from 690 to 1430 K in both a rapid compression machine and in a shock tube. A detailed chemical kinetic model consisting of 1328 reactions involving 230 species was constructed and used to validate the delay times. Moreover, this mechanism has been used to simulate previously published ignition delay times at atmospheric and higher pressure. Arrhenius-type ignition delay correlations were developed for temperatures greater than 1025 K which relate ignition delay time to temperature and concentration of the mixture. Furthermore, a detailed sensitivity analysis and a reaction pathway analysis were performed to give further insight to the chemistry at various conditions. When compared to existing data from the literature, the model performs quite well, and in several instances the conditions of earlier experiments were duplicated in the laboratory with overall good agreement. To the authors' knowledge, the present paper presents the most comprehensive set of ignition delay time experiments and kinetic model validation for n-butane oxidation in air. (author)

Healy, D.; Curran, H.J. [Combustion Chemistry Centre, School of Chemistry, NUI Galway (Ireland); Donato, N.S.; Aul, C.J.; Petersen, E.L. [Department of Mechanical Engineering, Texas A and M University, College Station, TX (United States); Zinner, C.M. [Mechanical, Materials and Aerospace Engineering, University of Central Florida, Orlando, FL (United States); Bourque, G. [Rolls-Royce Canada Limited, 9500 Cote de Liesse, Lachine, Quebec, H8T 1A2 (Canada)

2010-08-15T23:59:59.000Z

417

Abstract--This paper demonstrates the results from a detailed study of the overvoltage protection of a particular  

E-Print Network (OSTI)

protection of a particular 400/150 kV 400 MVA power transformer. The work presented here is based on real.dk about the effectiveness of the lightning protection of the transformers now used at Energinet.dk's power stations. The possibility of this happening again to any of the other power transformers in Eltra

Bak, Claus Leth

418

System Advisor Model: Flat Plate Photovoltaic Performance Modeling Validation Report  

SciTech Connect

The System Advisor Model (SAM) is a free software tool that performs detailed analysis of both system performance and system financing for a variety of renewable energy technologies. This report provides detailed validation of the SAM flat plate photovoltaic performance model by comparing SAM-modeled PV system generation data to actual measured production data for nine PV systems ranging from 75 kW to greater than 25 MW in size. The results show strong agreement between SAM predictions and field data, with annualized prediction error below 3% for all fixed tilt cases and below 8% for all one axis tracked cases. The analysis concludes that snow cover and system outages are the primary sources of disagreement, and other deviations resulting from seasonal biases in the irradiation models and one axis tracking issues are discussed in detail.

Freeman, J.; Whitmore, J.; Kaffine, L.; Blair, N.; Dobos, A. P.

2013-12-01T23:59:59.000Z

419

Detailed parametric analyses of heat transfer in CPC solar energy collectors  

SciTech Connect

A detailed parametric analysis of heat transfer in compound parabolic concentrating solar energy collectors has been performed, using a unified model for their optical and thermophysical behaviour. The effects of angular inclination and collector acceptance angles on free convection within the cavity are presented. The circumferential variation of local Nusselt number about the absorber is determined. A convective heat transfer correlation is obtained for the average Nusselt number with respect to Grashof number that takes into account acceptance angle and angular inclination. The developed correlation is extended to truncated compound parabolic concentrators.

Eames, P.C.; Norton, B. (Univ. of Ulster (United Kingdom))

1993-04-01T23:59:59.000Z

420

Performance modeling of Beamlet  

SciTech Connect

Detailed modeling of beam propagation in Beamlet has been made to predict system performance. New software allows extensive use of optical component characteristics. This inclusion of real optical component characteristics has resulted in close agreement between calculated and measured beam distributions.

Auerbach, J.M.; Lawson, J.K.; Rotter, M.D.; Sacks, R.A.; Van Wonterghem, B.W.; Williams, W.H.

1995-06-27T23:59:59.000Z

Note: This page contains sample records for the topic "model results detailed" 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

Report Details Efforts to Improve, Advance Indoor Microbial ...  

Science Conference Proceedings (OSTI)

... viruses, scientists estimate, make up half of the world's biomass—some 10 ... the results of these discussions, highlighting the current state of science ...

2012-10-15T23:59:59.000Z

422

NIST Guide Details Forensic Practices for Data Analysis  

Science Conference Proceedings (OSTI)

... information; and (4) report the results of the analysis. ... that can be applied to most scenarios as well as additional scenario-specific questions ...

2013-09-05T23:59:59.000Z

423

Planning and initiation of detailed engineering design for the Great Plains coal gasification project. Final report  

Science Conference Proceedings (OSTI)

During the course of detailed engineering it was expected that preliminary engineering documents would need to be modified. In a number of instances, however, especially for flow diagrams and specifications, the revised preliminary engineering documents became the final approved for construction (AFC) documents. P and ID's and plot plans were updated as a result of the detailed piping design. Equipment data sheets which initially contained basic process data were made mechanically complete and then further updated to reflect the equipment actually purchased. The initial issue of the preliminary engineering documents represent a necessary baseline for monitoring project design changes. Foundation work, equipment specifications and status of engineering in the various process operations are discussed.

Not Available

1980-01-01T23:59:59.000Z

424

Detailed analysis of uranium silicide dispersion fuel swelling  

SciTech Connect

Swelling of U{sub 3}Si and U{sub 3}Si{sub 2} is analyzed. The growth of fission gas bubbles appears to be affected by fission rate, fuel loading, and microstructural change taking place in the fuel compounds during irradiation. Several mechanisms are explored to explain the observations. The present work is aimed at a better understanding of the basic swelling phenomenon in order to accurately model irradiation behavior of uranium silicide disperson fuel. 5 refs., 10 figs.

Hofman, G.L.; Ryu, Woo-Seog.

1989-01-01T23:59:59.000Z

425

Salt Block I test: experimental details and comparison with theory. Final report  

SciTech Connect

A series of laboratory experiments has been completed at Sandia Laboratories to provide an understanding of the steady state and transient thermal response of a large salt block containing an internal heat source. In this report, details of the experimental program are presented along with results of related efforts, such as thermal conductivity experiments, done in support of the heater experiments (Salt Block I). Finite element temperature field predictions, both transient and steady state, are performed utilizing the COYOTE nonlinear heat conduction program. Comparisons of experimental and theoretical results are generally quite good.

Duffey, T.A.

1980-02-01T23:59:59.000Z

426

Solar information process model  

DOE Green Energy (OSTI)

The MITRE Solar Information Process Model (SIP) is a computerized model that simulates information processes in solar markets. As such, it represents a useful tool in the formulation of solar information outreach programs. For each market investigated, SIP model outputs include prioritized listings of the information needs of key decision makers and other strategically important market participants, and related information flow paths. This report provides macro-descriptions of the model and its logic together with a detailed illustrative example of its application. It also presents the findings and conclusions resulting from utilization of the model in the analysis of information processes in eight solar markets within the residential, commercial and agricultural sectors.

Hewett, R.; Spewak, P.

1978-12-01T23:59:59.000Z

427

A model-data intercomparison of CO2 exchange across North America: Results from the North American Carbon Program site synthesis  

Science Conference Proceedings (OSTI)

Our current understanding of terrestrial carbon processes is represented in various models used to integrate and scale measurements of CO2 exchange from remote sensing and other spatiotemporal data. Yet assessments are rarely conducted to determine how well models simulate carbon processes across vegetation types and environmental conditions. Using standardized data from the North American Carbon Program we compare observed and simulated monthly CO2 exchange from 44 eddy covariance flux towers in North America and 22 terrestrial biosphere models. The analysis period spans 220 site-years, 10 biomes, and includes two large-scale drought events, providing a natural experiment to evaluate model skill as a function of drought and seasonality. We evaluate models' ability to simulate the seasonal cycle of CO2 exchange using multiple model skill metrics and analyze links between model characteristics, site history, and model skill. Overall model performance was poor; the difference between observations and simulations was 10 times observational uncertainty, with forested ecosystems better predicted than nonforested. Model-data agreement was highest in summer and in temperate evergreen forests. In contrast, model performance declined in spring and fall, especially in ecosystems with large deciduous components, and in dry periods during the growing season. Models used across multiple biomes and sites, the mean model ensemble, and a model using assimilated parameter values showed high consistency with observations. Models with the highest skill across all biomes all used prescribed canopy phenology, calculated NEE as the difference between GPP and ecosystem respiration, and did not use a daily time step.

Schwalm, Christopher R. [Clark University; Williams, Christopher A. [Clark University; Schaefer, Kevin [University of Colorado, Boulder; Anderson, Ryan [University of Montana, Missoula; Arain, A. [McMaster University; Baker, Ian [Colorado State University, Fort Collins; Lokupitiya, Erandathie [Colorado State University, Fort Collins; Barr, Alan [Atmospheric Science and Technology Directorate, Saskatoo, SK, Canada; Black, T. A. [University of British Columbia, Vancouver; Gu, Lianhong [ORNL; Riciutto, Dan M. [Oak Ridge National Laboratory (ORNL)

2010-12-01T23:59:59.000Z

428

Model documentation Natural Gas Transmission and Distribution Model of the National Energy Modeling System. Volume 1  

Science Conference Proceedings (OSTI)

The Natural Gas Transmission and Distribution Model (NGTDM) of the National Energy Modeling System is developed and maintained by the Energy Information Administration (EIA), Office of Integrated Analysis and Forecasting. This report documents the archived version of the NGTDM that was used to produce the natural gas forecasts presented in the Annual Energy Outlook 1996, (DOE/EIA-0383(96)). The purpose of this report is to provide a reference document for model analysts, users, and the public that defines the objectives of the model, describes its basic approach, and provides detail on the methodology employed. Previously this report represented Volume I of a two-volume set. Volume II reported on model performance, detailing convergence criteria and properties, results of sensitivity testing, comparison of model outputs with the literature and/or other model results, and major unresolved issues.

NONE

1996-02-26T23:59:59.000Z

429

Modeling  

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

ALE-AMR ALE-AMR code Wangyi Liu, John Bernard, Alex Friedman, Nathan Masters, Aaron Fisher, Velemir Mlaker, Alice Koniges, David Eder June 4, 2011 Abstract In this paper we describe an implementation of a single-fluid inter- face model in the ALE-AMR code to simulate surface tension effects. The model does not require explicit information on the physical state of the two phases. The only change to the existing fluid equations is an additional term in the stress tensor. We show results of applying the model to an expanding Al droplet surrounded by an Al vapor, where additional droplets are created. 1 Introduction The Neutralized Drift Compression Experiment II (NDCX II) is an induction accelerator planned for initial commissioning in 2012. The final design calls for a 3 MeV, Li+ ion beam, delivered in a bunch with characteristic pulse duration of 1 ns, and transverse dimension of order 1 mm. The

430

Detailed chemical kinetic mechanism for the oxidation of biodiesel fuels blend surrogate.  

DOE Green Energy (OSTI)

Detailed chemical kinetic mechanisms were developed and used to study the oxidation of two large unsaturated esters: methyl-5-decenoate and methyl-9-decenoate. These models were built from a previous methyl decanoate mechanism and were compared with rapeseed oil methyl esters oxidation experiments in a jet stirred reactor. A comparative study of the reactivity of these three oxygenated compounds was performed and the differences in the distribution of the products of the reaction were highlighted showing the influence of the presence and the position of a double bond in the chain. Blend surrogates, containing methyl decanoate, methyl-5-decenoate, methyl-9-decenoate and n-alkanes, were tested against rapeseed oil methyl esters and methyl palmitate/n-decane experiments. These surrogate models are realistic kinetic tools allowing the study of the combustion of biodiesel fuels in diesel and homogeneous charge compression ignition engines.

Herbinet, O; Pitz, W J; Westbrook, C K

2009-07-21T23:59:59.000Z

431

Development of a solar desiccant dehumidifier. Volume 1. Summary. Volume 2. Detailed technical information. Technical progress report  

DOE Green Energy (OSTI)

Research and development work aimed at the development of a solar desiccant dehumidifier is described in detail. The system features a rotary bed of granular silica gel and a rotary regenerator. The dehumidifier can be used for air conditioning through adiabatic saturation of the process airstream. Detailed technical information is presented in the appendices: (A) management, (B) review of the literature: state-of-the-art survey and SERI meeting, (C) review of the literature: adsorbent survey, (D) design requirements and evaluation criteria, (E) design requirements and evaluation criteria, single-family house model, (F) design requirements and evaluation criteria, economic model, (G) design requirements and evaluation criteria: conventional system models for comparison, (H) candidate cooling subsystems, (I) subsystem computer model, (J) subsystem performance map, and (K) subsystem preliminary design. (WHK)

Gunderson, M.E.; Hwang, K.C.; Railing, S.M.

1978-03-31T23:59:59.000Z

432

Fort Irwin Integrated Resource Assessment. Volume 2, Baseline detail  

SciTech Connect

This report documents the assessment of baseline energy use at Fort Irwin, a US Army Forces Command facility near Barstow, California. It is a companion report to Volume 1, Executive Summary, and Volume 3, Integrated Resource Assessment. The US Army Forces Command (FORSCOM) has tasked the US Department of Energy (DOE) Federal Energy Management Program (FEMP), supported by the Pacific Northwest Laboratory (PNL), to identify, evaluate, and assist in acquiring all cost-effective energy projects at Fort Irwin. This is part of a model program that PNL has designed to support energy-use decisions in the federal sector. This program (1) identifies and evaluates all cost-effective energy projects; (2) develops a schedule at each installation for project acquisition considering project type, size, timing, and capital requirements, as well as energy and dollar savings; and (3) targets 100% of the financing required to implement energy efficiency projects. PNL applied this model program to Fort Irwin. This analysis examines the characteristics of electric, propane gas, and vehicle fuel use for a typical operating year. It records energy-use intensities for the facilities at Fort Irwin by building type and energy end use. It also breaks down building energy consumption by fuel type, energy end use, and building type. A complete energy consumption reconciliation is presented that accounts for all energy use among buildings, utilities, and applicable losses.

Richman, E.E.; Keller, J.M.; Dittmer, A.L.; Hadley, D.L.

1994-01-01T23:59:59.000Z

433

Centrifuge Modeling and Analysis of Concrete Gravity Dams  

Science Conference Proceedings (OSTI)

This report contains general background information on centrifuge experimentation and linear elastic fracture mechanics pertaining to concrete gravity dam models, and explains in detail the experimental methodology and procedures developed for testing concrete gravity dam models in centrifuges. An important detail in the experimental procedure is that the models are loaded upstream with water and, at fracture, have water uplift pressure within any cracks. Finally, test results and comparisons to analytic...

1995-12-14T23:59:59.000Z

434

General purpose rigid coaxial transmission lines and their associated flange connectors - Part 2 Detail specifications  

E-Print Network (OSTI)

Describes detail specifications for general purpose rigid coaxial transmission lines and their associated flange connectors.

International Electrotechnical Commission. Geneva

1996-01-01T23:59:59.000Z

435

Student Records Detail Student Information Page 1 of 63  

E-Print Network (OSTI)

There are several search options available here. Enter the student ID Or Enter the Campus ID (former system ID the Search Button From this list, select the term record desired by clicking on the ID number field between terms if the search result was a list of terms for the student. The Report Manager link is non

Peterson, Blake R.

436

A model-data intercomparison of CO2 exchange across North America: Results from the North American Carbon Program Site Synthesis  

Science Conference Proceedings (OSTI)

Our current understanding of terrestrial carbon processes is represented in various models used to integrate and scale measurements of CO{sub 2} exchange from remote sensing and other spatiotemporal data. Yet assessments are rarely conducted to determine how well models simulate carbon processes across vegetation types and environmental conditions. Using standardized data from the North American Carbon Program we compare observed and simulated monthly CO{sub 2} exchange from 44 eddy covariance flux towers in North America and 22 terrestrial biosphere models. The analysis period spans {approx}220 site-years, 10 biomes, and includes two large-scale drought events, providing a natural experiment to evaluate model skill as a function of drought and seasonality. We evaluate models' ability to simulate the seasonal cycle of CO{sub 2} exchange using multiple model skill metrics and analyze links between model characteristics, site history, and model skill. Overall model performance was poor; the difference between observations and simulations was {approx}10 times observational uncertainty, with forested ecosystems better predicted than nonforested. Model-data agreement was highest in summer and in temperate evergreen forests. In contrast, model performance declined in spring and fall, especially in ecosystems with large deciduous components, and in dry periods during the growing season. Models used across multiple biomes and sites, the mean model ensemble, and a model using assimilated parameter values showed high consistency with observations. Models with the highest skill across all biomes all used prescribed canopy phenology, calculated NEE as the difference between GPP and ecosystem respiration, and did not use a daily time step.

Schwalm, C.R.; Williams, C.A.; Schaefer, K.; Anderson, R.; Arain, M.A.; Baker, I.; Black, T.A.; Chen, G.; Ciais, P.; Davis, K. J.; Desai, A. R.; Dietze, M.; Dragoni, D.; Fischer, M.L.; Flanagan, L.B.; Grant, R.F.; Gu, L.; Hollinger, D.; Izaurralde, R.C.; Kucharik, C.; Lafleur, P.M.; Law, B.E.; Li, L.; Li, Z.; Liu, S.; Lokupitiya, E.; Luo, Y.; Ma, S.; Margolis, H.; Matamala, R.; McCaughey, H.; Monson, R. K.; Oechel, W. C.; Peng, C.; Poulter, B.; Price, D.T.; Riciutto, D.M.; Riley, W.J.; Sahoo, A.K.; Sprintsin, M.; Sun, J.; Tian, H.; Tonitto, C.; Verbeeck, H.; Verma, S.B.

2011-06-01T23:59:59.000Z

437

Piecewise Linear Modeling and Analysis  

Science Conference Proceedings (OSTI)

From the Publisher:Piecewise Linear Modeling and Analysis explains in detail all possible model descriptions to efficiently store piecewise linear functions starting with the Chua descriptions. Detailed explanation on how the model parameter can be obtained ...

Domine M. W. Leenaerts; Wim M. Van Bokhoven

1998-07-01T23:59:59.000Z

438

Detailed Chemical Kinetic Reaction Mechanism for Biodiesel Components Methyl Stearate and Methyl Oleate  

DOE Green Energy (OSTI)

New chemical kinetic reaction mechanisms are developed for two of the five major components of biodiesel fuel, methyl stearate and methyl oleate. The mechanisms are produced using existing reaction classes and rules for reaction rates, with additional reaction classes to describe other reactions unique to methyl ester species. Mechanism capabilities were examined by computing fuel/air autoignition delay times and comparing the results with more conventional hydrocarbon fuels for which experimental results are available. Additional comparisons were carried out with measured results taken from jet-stirred reactor experiments for rapeseed methyl ester fuels. In both sets of computational tests, methyl oleate was found to be slightly less reactive than methyl stearate, and an explanation of this observation is made showing that the double bond in methyl oleate inhibits certain low temperature chain branching reaction pathways important in methyl stearate. The resulting detailed chemical kinetic reaction mechanism includes more approximately 3500 chemical species and more than 17,000 chemical reactions.

Naik, C; Westbrook, C K; Herbinet, O; Pitz, W J; Mehl, M

2010-01-22T23:59:59.000Z

439

China's Building Energy Use: A Long-Term Perspective based on a Detailed Assessment  

SciTech Connect

We present here a detailed, service-based model of China's building energy use, nested in the GCAM (Global Change Assessment Model) integrated assessment framework. Using the model, we explore long-term pathways of China's building energy use and identify opportunities of reducing greenhouse gas emissions. The inclusion of a structural model of building energy demands within an integrated assessment framework represents a major methodological advance. It allows for a structural understanding of the drivers of building energy consumption while simultaneously considering the other human and natural system interactions that influence changes in the global energy system and climate. We also explore a range of different scenarios to gain insights into how China's building sector might evolve and what the implications might be for improved building energy technology and carbon policies. The analysis suggests that China's building energy growth will not wane anytime soon, although technology improvement will put downward pressure on this growth. Also, regardless of the scenarios represented, the growth will involve the continued, rapid electrification of the buildings sector throughout the century, and this transition will be accelerated by the implementation of carbon policy.

Eom, Jiyong; Clarke, Leon E.; Kim, Son H.; Kyle, G. Page; Patel, Pralit L.

2012-01-13T23:59:59.000Z

440

China's Building Energy Demand: Long-Term Implications from a Detailed Assessment  

Science Conference Proceedings (OSTI)

We present here a detailed, service-based model of China’s building energy use, nested in the GCAM (Global Change Assessment Model) integrated assessment framework. Using the model, we explore long-term pathways of China’s building energy use and identify opportunities of reducing greenhouse gas emissions. The inclusion of a structural model of building energy demands within an integrated assessment framework represents a major methodological advance. It allows for a structural understanding of the drivers of building energy consumption while simultaneously considering the other human and natural system interactions that influence changes in the global energy system and climate. We also explore a range of different scenarios to gain insights into how China’s building sector might evolve and what the implications might be for improved building energy technology and carbon policies. The analysis suggests that China’s building energy growth will not wane anytime soon, although technology improvement will put downward pressure on this growth. Also, regardless of the scenarios represented, the growth will involve the continued, rapid electrification of the buildings sector throughout the century, and this transition will be accelerated by the implementation of carbon policy.

Eom, Jiyong; Clarke, Leon E.; Kim, Son H.; Kyle, G. Page; Patel, Pralit L.

2012-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "model results detailed" 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

DETAILED LOOP MODEL (DLM) ANALYSIS OF LIQUID SOLAR THERMOSIPHONS WITH HEAT EXCHANGERS  

E-Print Network (OSTI)

n s of the 3rd Annual Solar Heating and Cooling Research anof a Thermic Diode Solar Heating System, 11 presented theof Materials Used in Solar Heating and Cooling (SHAC)

Mertol, A.

2013-01-01T23:59:59.000Z

442

Detailed Chemical Kinetic Model Evaluation of the Selective Non-Catalytic Reduction (SNCR) Process  

Science Conference Proceedings (OSTI)

As federal and state regulations on nitrogen oxide (NOx) emissions from fossil-fueled power plants become stricter, post-combustion techniques such as selective non-catalytic reduction (SNCR) become viable options to achieve compliance. In the SNCR process, urea or ammonia is injected into the combustion products and reacts selectively with NOx to form nitrogen and water. Operating scenarios often arise that justify application of a low-capital cost technology that can provide incremental NOx reductions ...

2003-08-21T23:59:59.000Z

443

DETAILED LOOP MODEL (DLM) ANALYSIS OF LIQUID SOLAR THERMOSIPHONS WITH HEAT EXCHANGERS  

E-Print Network (OSTI)

Water Solar Tank Warm Water Hot Water Heater Water Tank Heatsolar thermosiphon water heaters with heat exchangers in storage tanks.solar water heater with a heat exchanger in the storage tank.

Mertol, A.

2013-01-01T23:59:59.000Z

444

MASE: A Novel Infrastructure for Detailed Microarchitectural Modeling Advanced Computer Architecture Laboratory  

E-Print Network (OSTI)

............................................................................................... 69 3.6.2 Control Errors in Checkers, including bi-level and analog voting, pulse train generation, event timing, and serial communications

Austin, Todd M.

445

Appears in ISPASS-2001. MASE: A Novel Infrastructure for Detailed Microarchitectural Modeling  

E-Print Network (OSTI)

letters is a source of distress for typists and spell checkers. A child at heart, he collects toy trains Where: Brown Theatre, Electrical & Electronic Engineering (Building 193), University of Melbourne

Austin, Todd M.

446

DETAILED LOOP MODEL (DLM) ANALYSIS OF LIQUID SOLAR THERMOSIPHONS WITH HEAT EXCHANGERS  

E-Print Network (OSTI)

During periods of low solar radiation, reversed convectionapproximations for the solar radiation on the absorber coverare used for the solar radiation on the absorber cover

Mertol, A.

2013-01-01T23:59:59.000Z

447

DETAILED LOOP MODEL (DLM) ANALYSIS OF LIQUID SOLAR THERMOSIPHONS WITH HEAT EXCHANGERS  

E-Print Network (OSTI)

Eq. (18b) Dhe heat exchanger heat transfer parameter, Eq. (t1 Loop Thermosiphon Heat Exchanger,n ASHRAE Transactions,s . • Thermosiphon Heat Exchanger,n Part 2, 1980, No. 2588,

Mertol, A.

2013-01-01T23:59:59.000Z

448

Chemical Engineering Journal 113 (2005) 205214 A detailed model of a biofilter for ammonia removal  

E-Print Network (OSTI)

significant changes while aging during storage for later field application or by composting for litter mass reached during com- posting. Poultry litter is usually composted to assimilate soluble forms of N, reduce compost is greatly reduced compared with the initial moisture con- tent, the compost is by no means oven

449

DETAILED LOOP MODEL (DLM) ANALYSIS OF LIQUID SOLAR THERMOSIPHONS WITH HEAT EXCHANGERS  

E-Print Network (OSTI)

Ph. D. Dissertation. University of California. Berkeley. Mayof the University of California, nor any of their employees,of SDHW Systems in California, 11 Report to the California

Mertol, A.

2013-01-01T23:59:59.000Z

450

American Institute of Aeronautics and Astronautics Model Validation of a Bolted Beam Using Spatially Detailed  

E-Print Network (OSTI)

­ scaling effects ­ DOT/FAA AR-03/75. Feb.; 2004. [22] MIL-HDBK-17-3F: vol. 3 ­ Damage resistance

Allen, Matthew S.

451

DETAILED LOOP MODEL (DLM) ANALYSIS OF LIQUID SOLAR THERMOSIPHONS WITH HEAT EXCHANGERS  

E-Print Network (OSTI)

THERMOSIPHONS WITH HEAT EXCHANGERS A. Mertol, W. Place, T.Eq. (18b) Dhe heat exchanger heat transfer parameter, Eq. (t1 Loop Thermosiphon Heat Exchanger,n ASHRAE Transactions,

Mertol, A.

2013-01-01T23:59:59.000Z

452

Detailed modeling of the evaporation and thermal decomposition of urea-water-solution in SCR systems  

E-Print Network (OSTI)

NOx reduction in net oxidizing exhaust gas, SAE International Paper N° 900496, 99, 1990. [2] KOEBEL M on the performance of metal exchanged zeolites for the selective catalytic reduction of NOx: Part I. Pyrolysis thermolysis and NOx reduction with and without SCR catalysts, Applied Catalysis B: Environmental, 46, pp.17

453

DETAILED LOOP MODEL (DLM) ANALYSIS OF LIQUID SOLAR THERMOSIPHONS WITH HEAT EXCHANGERS  

E-Print Network (OSTI)

DLM on the other hand con- pipes heat loss from ows. para 11~ headers~ connecting pipes~ and heat exchanger tubes) isconnecting pipes (riser and downcomer) and a heat exchanger

Mertol, A.

2013-01-01T23:59:59.000Z

454

Detailed OEDGE Modeling of Core-Pedestal Fueling in DIII-D (A27332)  

E-Print Network (OSTI)

Proc. Of 20th Plasma Surface Interactions In Controlled Fusion Devices, Aachen, Germany (2012); To Be Published In J. Nucl. Mater.20th International Conference on Plasma Surface Interactions in Controlled Fusion Devices Aachen, DE, 2012999619093

Elder, J.D.

2012-06-25T23:59:59.000Z

455

Microsoft Word - NPH Workshop with Detailed Summary.docx  

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

Natural Phenomena Hazards Workshop Natural Phenomena Hazards Workshop October 25-26, 2011 Location: Cloverleaf Building, Germantown, Maryland, Room 1300 Tuesday, October 25 7:30 a.m. Registration; coffee and bagels will be served 8:00 a.m. Welcome and introductions 8:10 a.m. Workshop Overview - Chip Lagdon, CNS Theme 1: Soil-structure interaction issues 8:30 a.m. SASSI Subtraction Method Effects at Various DOE Projects Greg Mertz, Michael Costantino, Thomas Houston, and Andrew Maham 9:00 a.m. Application of the Computer Program SASSI for Seismic SSI Analysis for DOE Facilities Farhang Ostadan and Raman Venkata 9:30 a.m. BREAK 9:45 a.m. SASSI Analytical Methods Compared with SHAKE Free-Field Results Dennis Niehoff, Jayprakash Amin, Shawn Carey, and J. Bhatt 10:15 a.m. Structure Soil Structure Interaction Effects: Seismic Analysis of Safety-Related

456

The Kirki episode: Detailed biomarker analysis provides some surprises  

Science Conference Proceedings (OSTI)

On Sunday 21st July 1991 the oil tanker Kirki caught fire when its bow broke off in heavy seas just 40 km off the Western Australian coastline near Jurien, approximately 200 km north of Perth. The tanker was carrying 80,000 tonnes of Murban light crude oil from the Middle East. Over the next three days approximately 10,000 tonnes of this oil was released into the marine environment, the heavy seas rapidly spreading the oil slick to a thin sheen. There was extensive media coverage of this event and it was widely considered that the spill posed a serious environmental threat to reef systems, recreational beaches and the local rock lobster fishery. This report describes results of analysis performed on several of the samples.

Currie, T.J.; Alexander, R.; Kagi, R.I. [Curtin Univ. of Technology, Perth (Australia)

1996-12-31T23:59:59.000Z

457

Strategic cost-benefit analysis of energy policies: detailed projections  

DOE Green Energy (OSTI)

Current US energy policy includes many programs directed toward restructuring the energy system in order to decrease US dependence on foreign supplies and to increase our reliance on plentiful and environmentally benign energy forms. However, recent events have led to renewed concern over the direction of current energy policy. This study describes three possible energy strategies and analyzes each in terms of its economic, environmental, and national security benefits and costs. Each strategy is represented by a specific policy. In the first, no additional programs or policies are initiated beyond those currently in effect or announced. The second is directed toward reducing the growth in energy demand, i.e., energy conservation. The third promotes increased domestic supply through accelerated development of synthetic and unconventional fuels. The analysis focuses on the evaluation and comparison of these strategy alternatives with respect to their energy, economic, and environmental consequences. Results indicate that conservation can substantially reduce import dependence and slow the growth of energy demand, with only a small macroeconomic cost and with substantial environmental benefits; the synfuels policy reduces imports by a smaller amount, does not reduce the growth in energy demand, involves substantial environmental costs and slows the rate of economic growth. These relationships could be different if the energy savings per unit cost for conservation are less than anticipated, or if the costs of synthetic fuels can be significantly lowered. Given these uncertainties, both conservation and RD and D support for synfuels should be included in future energy policy. However, between these policy alternatives, conservation appears to be the preferred strategy. The results of this study are presented in three reports (see also BNL--51105 and BNL--51128). 11 references, 3 figures, 61 tables.

Davitian, H.; Groncki, P.J.; Kleeman, P.; Lukachinski, J.

1979-10-01T23:59:59.000Z

458

Application of MELCOR Code to a French PWR 900 MWe Severe Accident Sequence and Evaluation of Models Performance Focusing on In-Vessel Thermal Hydraulic Results  

Science Conference Proceedings (OSTI)

In the ambit of the Severe Accident Network of Excellence Project (SARNET), funded by the European Union, 6. FISA (Fission Safety) Programme, one of the main tasks is the development and validation of the European Accident Source Term Evaluation Code (ASTEC Code). One of the reference codes used to compare ASTEC results, coming from experimental and Reactor Plant applications, is MELCOR. ENEA is a SARNET member and also an ASTEC and MELCOR user. During the first 18 months of this project, we performed a series of MELCOR and ASTEC calculations referring to a French PWR 900 MWe and to the accident sequence of 'Loss of Steam Generator (SG) Feedwater' (known as H2 sequence in the French classification). H2 is an accident sequence substantially equivalent to a Station Blackout scenario, like a TMLB accident, with the only difference that in H2 sequence the scram is forced to occur with a delay of 28 seconds. The main events during the accident sequence are a loss of normal and auxiliary SG feedwater (0 s), followed by a scram when the water level in SG is equal or less than 0.7 m (after 28 seconds). There is also a main coolant pumps trip when {delta}Tsat < 10 deg. C, a total opening of the three relief valves when Tric (core maximal outlet temperature) is above 603 K (330 deg. C) and accumulators isolation when primary pressure goes below 1.5 MPa (15 bar). Among many other points, it is worth noting that this was the first time that a MELCOR 1.8.5 input deck was available for a French PWR 900. The main ENEA effort in this period was devoted to prepare the MELCOR input deck using the code version v.1.8.5 (build QZ Oct 2000 with the latest patch 185003 Oct 2001). The input deck, completely new, was prepared taking into account structure, data and same conditions as those found inside ASTEC input decks. The main goal of the work presented in this paper is to put in evidence where and when MELCOR provides good enough results and why, in some cases mainly referring to its specific models (candling, corium pool behaviour, etc.) they were less good. A future work will be the preparation of an input deck for the new MELCOR 1.8.6. and to perform a code-to-code comparison with ASTEC v1.2 rev. 1. (author)

De Rosa, Felice [ENEA, Italian National Agency for New Technologies, Energy and the Environment (Italy)

2006-07-01T23:59:59.000Z

459

Summer Land–Atmosphere Coupling Strength over the United States: Results from the Regional Climate Model RegCM4–CLM3.5  

Science Conference Proceedings (OSTI)

This study investigates the land–atmosphere coupling strength during summer over the United States using the Regional Climate Model version 4 (RegCM4)–Community Land Model version 3.5 (CLM3.5). First, a 10-yr simulation driven with reanalysis ...

Rui Mei; Guiling Wang; Huanghe Gu

2013-06-01T23:59:59.000Z

460

Annual Cycle of Poleward Heat Transport in the Ocean: Results from High-Resolution Modeling of the North and Equatorial Atlantic  

Science Conference Proceedings (OSTI)

The annual cycle of meridional heat transport in the North and equatorial Atlantic Ocean is studied by means of the high-resolution numerical model that had been developed in recent years as a Community Modeling Effort for the World Ocean ...

Claus W. Böning; Peter Herrmann

1994-01-01T23:59:59.000Z

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461

Population Physiologically-Based Pharmacokinetic Modeling for the Human Lactational Transfer of PCB 153 with Consideration of Worldwide Human Biomonitoring Results  

SciTech Connect

We developed a physiologically based pharmacokinetic model of PCB 153 in women, and predict its transfer via lactation to infants. The model is the first human, population-scale lactational model for PCB 153. Data in the literature provided estimates for model development and for performance assessment. Physiological parameters were taken from a cohort in Taiwan and from reference values in the literature. We estimated partition coefficients based on chemical structure and the lipid content in various body tissues. Using exposure data in Japan, we predicted acquired body burden of PCB 153 at an average childbearing age of 25 years and compare predictions to measurements from studies in multiple countries. Forward-model predictions agree well with human biomonitoring measurements, as represented by summary statistics and uncertainty estimates. The model successfully describes the range of possible PCB 153 dispositions in maternal milk, suggesting a promising option for back estimating doses for various populations. One example of reverse dosimetry modeling was attempted using our PBPK model for possible exposure scenarios in Canadian Inuits who had the highest level of PCB 153 in their milk in the world.

Redding, Laurel E.; Sohn, Michael D.; McKone, Thomas E.; Wang, Shu-Li; Hsieh, Dennis P. H.; Yang, Raymond S. H.

2008-03-01T23:59:59.000Z

462

Waste receiving and processing facility module 1, detailed design report  

Science Conference Proceedings (OSTI)

WRAP 1 baseline documents which guided the technical development of the Title design included: (a) A/E Statement of Work (SOW) Revision 4C: This DOE-RL contractual document specified the workscope, deliverables, schedule, method of performance and reference criteria for the Title design preparation. (b) Functional Design Criteria (FDC) Revision 1: This DOE-RL technical criteria document specified the overall operational criteria for the facility. The document was a Revision 0 at the beginning of the design and advanced to Revision 1 during the tenure of the Title design. (c) Supplemental Design Requirements Document (SDRD) Revision 3: This baseline criteria document prepared by WHC for DOE-RL augments the FDC by providing further definition of the process, operational safety, and facility requirements to the A/E for guidance in preparing the design. The document was at a very preliminary stage at the onset of Title design and was revised in concert with the results of the engineering studies that were performed to resolve the numerous technical issues that the project faced when Title I was initiated, as well as, by requirements established during the course of the Title II design.

Not Available

1993-10-01T23:59:59.000Z

463