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


1

Clean Energy Solutions Large Scale CHP and Fuel Cells Program | Department  

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

Clean Energy Solutions Large Scale CHP and Fuel Cells Program Clean Energy Solutions Large Scale CHP and Fuel Cells Program Clean Energy Solutions Large Scale CHP and Fuel Cells Program < Back Eligibility Commercial Fed. Government Industrial Institutional Local Government Nonprofit State Government Savings Category Commercial Heating & Cooling Manufacturing Buying & Making Electricity Alternative Fuel Vehicles Hydrogen & Fuel Cells Maximum Rebate CHP: $3,000,000 or 30% of project costs Fuel Cells: $3,000,000 or 45% of project costs Program Info Start Date 01/17/2013 State New Jersey Program Type State Grant Program Rebate Amount CHP greater than 1 MW-3 MW: $0.55/wattt CHP > 3 MW: $0.35/watt Fuel Cells > 1 MW with waste heat utilization: $2.00/watt Fuel Cells > 1 MW without waste heat utilization: $1.50/watt

2

Clean Energy Solutions Large Scale CHP and Fuel Cells Program  

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

The New Jersey Economic Development Authority (EDA) is offering grants for the installation of combined heat and power (CHP) or fuel cell systems to commercial, industrial, and institutional...

3

Initial Market Assessment for Small-Scale Biomass-Based CHP  

SciTech Connect

The purpose of this report is to reexamine the energy generation market opportunities for biomass CHP applications smaller than 20 MW. This paper provides an overview of the benefits of and challenges for biomass CHP in terms of policy, including a discussion of the drivers behind, and constraints on, the biomass CHP market. The report provides a summary discussion of the available biomass supply types and technologies that could be used to feed the market. Two primary markets are outlined--rural/agricultural and urban--for small-scale biomass CHP, and illustrate the primary intersections of supply and demand for those markets. The paper concludes by summarizing the potential markets and suggests next steps for identifying and utilizing small-scale biomass.

Brown, E.; Mann, M.

2008-01-01T23:59:59.000Z

4

Small Scale CHP and Fuel Cell Incentive Program (New Jersey) | Department  

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

Small Scale CHP and Fuel Cell Incentive Program (New Jersey) Small Scale CHP and Fuel Cell Incentive Program (New Jersey) Small Scale CHP and Fuel Cell Incentive Program (New Jersey) < Back Eligibility Commercial Fed. Government Industrial Institutional Local Government Multi-Family Residential Nonprofit Schools State Government Savings Category Commercial Heating & Cooling Manufacturing Buying & Making Electricity Alternative Fuel Vehicles Hydrogen & Fuel Cells Wind Maximum Rebate Limits (% of cost) vary by system type, but the following limits also exist: NJCEP Incentive: $1 million Pay for Performance Bonus Incentive: $250,000 Utility Match: $1 million Overall Maximum: $2.25 million Program Info Funding Source New Jersey Societal Benefits Charge (public benefits fund) State New Jersey Program Type State Grant Program

5

Development and evaluation of a biomass-fired micro-scale CHP with organic rankine cycle.  

E-Print Network (OSTI)

??Combined Heat and Power Generation (CHP) or cogeneration has been considered worldwide as the major alternative to traditional energy systems in terms of signi ticant… (more)

Shao, Yingjuan

2011-01-01T23:59:59.000Z

6

CHP in federal sector  

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

Test Facility Texas DG Guidelines U of Md Test Bed Malden Mills Heatmap CHP Analysis Tool Microturbine tests Interconnection Standards 29 Palms USMC CHP Ft. Bragg CHP NYSERDAPark...

7

Introduction to a Large-Scale Biogas Plant in a Dairy Farm  

Science Conference Proceedings (OSTI)

This article describes a large-scale biogas plant in a dairy farm located in the Tongzhou District of Beijing. It is has a treatment capacity of 30t manure and 30t wastewater per day, a total of 60t/d with a residence time of 20 days. Input material ... Keywords: Large scale biogas plant, CHP, Biogas storage within digestor

Xiaolin Fan; Zifu Li; Tingting Wang; Fubin Yin; Xin Jin

2010-12-01T23:59:59.000Z

8

Large-Scale Hydropower  

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

Large-scale hydropower plants are generally developed to produce electricity for government or electric utility projects. These plants are more than 30 MW in size, and there is more than 80,000 MW...

9

Obstacles and Opportunity: Overcoming Barriers in Today's CHP Marketplace  

E-Print Network (OSTI)

Combined heat and power (CHP), which can offer tremendous efficiency benefits to industrial facilities around the country, continues to be viewed as a long-term efficiency opportunity. However, the high up-front cost of CHP equipment and fuel-dependent operating costs have made CHP a difficult sell internally in some corporations. The recent recession and slow recovery have further discouraged facility managers and owners from making large capital investments such as CHP. This paper addresses the biggest barriers to new CHP project development from the perspective of those intimately involved in moving new CHP projects forward: CHP developers and CHP advocates. It identifies economic and financial barriers as the largest common barriers found throughout the U.S. It also suggests ways that CHP developers and advocates can address these barriers, and attempts to overcome them in the current economic context.

Chittum, A.; Kaufman, N.

2011-01-01T23:59:59.000Z

10

Scaling Issues for Large-Scale Grids  

E-Print Network (OSTI)

· ESNet Can Play a Very Important Role in the Science Grid � Security Aspects of Grids · ESNet Can Provide will be important and very useful for managing large-scale virtual org. structures #12;·ESNet Can Play a Very Important Role in the Science Grid · ESNet can provide a rooted and managed namespace, and a place to home

11

Packaged CHP System Assessment  

Science Conference Proceedings (OSTI)

The Packaged CHP System Assessment report provides an analysis of packaged combined heat and power (CHP) systems. The report summarizes and compares the technical characteristics of commercial product lines with electric power output up to 3,000 kWe.

2004-03-22T23:59:59.000Z

12

Case Study of a Micro-CHP System  

Science Conference Proceedings (OSTI)

Combined Heat and Power (CHP) involves the simultaneous generation of power and usable heat in a single process or appliance. CHP systems for large multi-family housing properties can reduce energy expenses, minimize environmental emissions and improve the reliability of the electricity supply. With the emergence of new micro-combined heat and power (Micro-CHP) systems, single family and multi- residences can now potentially realize the benefits of personal power. However as with any emerging technology...

2007-02-26T23:59:59.000Z

13

VA's CHP Program  

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

- 36,353 MWh Total Contract Cost - 70.3 million 1,900MWh generation + Extra Boilers + FREE STEAM VA's Existing CHP Plants Partnerships for Healing Environments 2010 6...

14

Energy Basics: Large-Scale Hydropower  

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

Energy Basics Renewable Energy Printable Version Share this resource Biomass Geothermal Hydrogen Hydropower Large-Scale Hydropower Microhydropower Hydropower Resources...

15

Virtual screening on large scale grids  

Science Conference Proceedings (OSTI)

Large scale grids for in silico drug discovery open opportunities of particular interest to neglected and emerging diseases. In 2005 and 2006, we have been able to deploy large scale virtual docking within the framework of the WISDOM initiative against ... Keywords: Avian influenza, Large scale grids, Malaria, Virtual screening

Nicolas Jacq; Vincent Breton; Hsin-Yen Chen; Li-Yung Ho; Martin Hofmann; Vinod Kasam; Hurng-Chun Lee; Yannick Legré; Simon C. Lin; Astrid Maaí; Emmanuel Medernach; Ivan Merelli; Luciano Milanesi; Giulio Rastelli; Matthieu Reichstadt; Jean Salzemann; Horst Schwichtenberg; Ying-Ta Wu; Marc Zimmermann

2007-05-01T23:59:59.000Z

16

Building Energy Software Tools Directory : CHP Capacity Optimizer  

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

CHP Capacity Optimizer Back to Tool CHP Capacity Optimizer data entry screen CHP Capacity Optimizer results screen CHP Capacity Optimizer restult map...

17

Hexion CHP Project  

E-Print Network (OSTI)

Built in 1998 in South Glens Falls, New York, the Hexion Chemical plant can produce up to 200 million pounds of formaldehyde per year. The formaldehyde is produced by combining methanol with air in the presence of a catalyst. Heat is recovered from the exothermic reaction through a heat transfer fluid jacket around the reactor vessel that controls reaction temperature and transfers heat to a secondary water/steam loop. Until 2004, most of the heat entrained in the steam was vented to the atmosphere via a condenser. Since that time, a turbine-generator system, designed by Turbosteam recovers this waste heat to produce up to 451 kilowatts of electricity. This innovative combined heat and power (CHP) system uses no fuel and produces zero emissions. The CHP system is equivalent to annually reducing carbon dioxide emissions by more than 2,700 tons. The EPA and DOE have recognized the project with an EPA CHP Certificate of Recognition. The project has been operating successfully since early 2004.

Bullock, B.

2008-01-01T23:59:59.000Z

18

Centrality scaling in large networks  

E-Print Network (OSTI)

Betweenness centrality lies at the core of both transport and structural vulnerability properties of complex networks, however, it is computationally costly, and its measurement for networks with millions of nodes is near impossible. By introducing a multiscale decomposition of shortest paths, we show that the contributions to betweenness coming from geodesics not longer than L obey a characteristic scaling vs L, which can be used to predict the distribution of the full centralities. The method is also illustrated on a real-world social network of 5.5*10^6 nodes and 2.7*10^7 links.

Ercsey-Ravasz, Maria

2010-01-01T23:59:59.000Z

19

Yantai Tianli Biomass CHP Co Ltd | Open Energy Information  

Open Energy Info (EERE)

Yantai Tianli Biomass CHP Co Ltd Yantai Tianli Biomass CHP Co Ltd Jump to: navigation, search Name Yantai Tianli Biomass CHP Co Ltd Place Yantai, Shandong Province, China Zip 265300 Sector Biomass Product Yantai-based biomass CHP project developer. Coordinates 37.538971°, 121.374893° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":37.538971,"lon":121.374893,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

20

State Barriers to CHP Development  

E-Print Network (OSTI)

Every year, ACEEE collects data on regulatory policies in each state that theoretically serve to promote and discourage combined heat and power (CHP) development. In our annual State Energy Efficiency Scorecard (5), we assess the regulatory environment for CHP in each state and score states based on the favorability of their policies for CHP. As part of an effort to make this Scorecard more robust, ACEEE is conducting research to determine the practical realities of CHP development in each state from the perspective of CHP developers and technical assistance agencies. Preliminary research has shown that while certain regulations-and lack of regulations-can greatly influence the attractiveness or success of a project, there are market barriers outside the realm of policy that deserve a great deal of exploration and attention. Traditional regulatory barriers to CHP, such as interconnection procedures, air emissions regulations, and utility standby rates, do pose challenges for development in many states. However, discussions with CHP developers have revealed that many of these issues are overshadowed by economic and financial barriers, as well as other hidden market hurdles. Among these hurdles are the availability of natural gas at reasonable prices, the spark spread in a given region, the effectiveness of CHP developers, the presence of a devoted CHP champion at a host site, and the availability of financing mechanisms to mitigate the upfront capital burden on new projects. This paper will examine each region of the country and each state to determine specific barriers and outline a state-by-state market overview for CHP.

Chittum, A.; Kaufman, N.

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "large scale chp" 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

Energy Basics: Large-Scale Hydropower  

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

These plants are more than 30 MW in size, and there is more than 80,000 MW of installed generation capacity in the United States today. Most large-scale hydropower projects use a...

22

Program Management for Large Scale Engineering Programs  

E-Print Network (OSTI)

The goal of this whitepaper is to summarize the LAI research that applies to program management. The context of most of the research discussed in this whitepaper are large-scale engineering programs, particularly in the ...

Oehmen, Josef

23

Large-Scale Offshore Wind Power  

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

Large-Scale Offshore Wind Power in the United States EXECUTIVE SUMMARY September 2010 NOTICE This report was prepared as an account of work sponsored by an agency of the United...

24

Large-Scale Hydrogen Combustion Experiments  

Science Conference Proceedings (OSTI)

Large-scale combustion experiments show that deliberate ignition can limit hydrogen accumulation in reactor containments. The collected data allow accurate evaluation of containment pressures and temperatures associated with hydrogen combustion.

1988-10-18T23:59:59.000Z

25

Large-Scale Dynamics and Global Warming  

Science Conference Proceedings (OSTI)

Predictions of future climate change raise a variety of issues in large-scale atmospheric and oceanic dynamics. Several of these are reviewed in this essay, including the sensitivity of the circulation of the Atlantic Ocean to increasing ...

Isaac M. Held

1993-02-01T23:59:59.000Z

26

Combined Heat and Power (CHP) Systems | Department of Energy  

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

Technology Development » Smart Grid » Distributed Technology Development » Smart Grid » Distributed Energy » Combined Heat and Power (CHP) Systems Combined Heat and Power (CHP) Systems The CHP systems program aimed to facilitate acceptance of distributed energy in end-use sectors by forming partnerships with industry consortia in the commercial building, merchant stores, light industrial, supermarkets, restaurants, hospitality, health care and high-tech industries. In high-tech industries such as telecommunications, commercial data processing and internet services, the use of electronic data and signal processing have become a cornerstone in the U.S. economy. These industries represent high potential for CHP and distributed energy due to their ultra-high reliability and power quality requirements and related large

27

Micro-CHP Technology Assessment and Benchmarking  

Science Conference Proceedings (OSTI)

Significant public and private R&D investments continue to be made in the area of high-efficiency distributed fossil generation. Micro generation in combined heat and power (micro-CHP) applications is part of the portfolio mix, with a focus on residential and small commercial market segments. Such systems offer a potentially attractive cost of electricity, low greenhouse gas emissions, and smaller capital investments and shorter lead times than large central generation facilities. As part of a smart grid...

2009-10-12T23:59:59.000Z

28

Building Energy Software Tools Directory: CHP Capacity Optimizer  

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

Related Links CHP Capacity Optimizer CHP Capacity Optimizer logo Selecting the proper installed capacity for cooling, heating, and power (CHP) equipment is critical to the...

29

Micro-CHP Systems for Residential Applications  

SciTech Connect

Integrated micro-CHP (Cooling, Heating and Power) system solutions represent an opportunity to address all of the following requirements at once: conservation of scarce energy resources, moderation of pollutant release into our environment, and assured comfort for home-owners. The objective of this effort was to establish strategies for development, demonstration, and sustainable commercialization of cost-effective integrated CHP systems for residential applications. A unified approach to market and opportunity identification, technology assessment, specific system designs, adaptation to modular product platform component conceptual designs was employed. UTRC's recommendation to U.S. Department of Energy is to go ahead with the execution of the proposed product development and commercialization strategy plan under Phase II of this effort. Recent indicators show the emergence of micro-CHP. More than 12,000 micro-CHP systems have been sold worldwide so far, around 7,500 in 2004. Market projections predict a world-wide market growth over 35% per year. In 2004 the installations were mainly in Europe (73.5%) and in Japan (26.4%). The market in North-America is almost non-existent (0.1%). High energy consumption, high energy expenditure, large spark-spread (i.e., difference between electricity and fuel costs), big square footage, and high income are the key conditions for market acceptance. Today, these conditions are best found in the states of New York, Pennsylvania, New Jersey, Wisconsin, Illinois, Indiana, Michigan, Ohio, New England states. A multiple stage development plan is proposed to address risk mitigation. These stages include concept development and supplier engagement, component development, system integration, system demonstration, and field trials. A two stage commercialization strategy is suggested based on two product versions. The first version--a heat and power system named Micro-Cogen, provides the heat and essential electrical power to the homeowner. In its proposed embodiment, the system has a 2kW prime mover integrated to a furnace platform. The second version is a Micro-Trigen system with heating, cooling and power. It has the same Micro-Cogen platform integrated with a 14kW thermally activated chiller. A Stirling engine is suggested as a promising path for the prime mover. A LiBr absorption chiller is today's best technology in term of readiness level. Paybacks are acceptable for the Micro-Cogen version. However, there is no clear economically viable path for a Micro-Trigen version with today's available technology. This illustrates the importance of financial incentives to home owners in the initial stage of micro-CHP commercialization. It will help create the necessary conditions of volume demand to start transitioning to mass-production and cost reduction. Incentives to the manufacturers will help improve efficiency, enhance reliability, and lower cost, making micro-CHP products more attractive. Successful development of a micro-CHP system for residential applications has the potential to provide significant benefits to users, customers, manufacturers, and suppliers of such systems and, in general, to the nation as a whole. The benefits to the ultimate user are a comfortable and healthy home environment at an affordable cost, potential utility savings, and a reliable supply of energy. Manufacturers, component suppliers, and system integrators will see growth of a new market segment for integrated energy products. The benefits to the nation include significantly increased energy efficiency, reduced consumption of fossil fuels, pollutant and CO{sub 2} emissions from power generation, enhanced security from power interruptions as well as enhanced economic activity and job creation. An integrated micro-CHP energy system provides advantages over conventional power generation, since the energy is used more efficiently by means of efficient heat recovery. Foreign companies are readily selling products, mostly in Europe, and it is urgent to react promptly to these offerings that will soon em

Timothy DeValve; Benoit Olsommer

2007-09-30T23:59:59.000Z

30

Micro-CHP Systems for Residential Applications  

SciTech Connect

Integrated micro-CHP (Cooling, Heating and Power) system solutions represent an opportunity to address all of the following requirements at once: conservation of scarce energy resources, moderation of pollutant release into our environment, and assured comfort for home-owners. The objective of this effort was to establish strategies for development, demonstration, and sustainable commercialization of cost-effective integrated CHP systems for residential applications. A unified approach to market and opportunity identification, technology assessment, specific system designs, adaptation to modular product platform component conceptual designs was employed. UTRC's recommendation to U.S. Department of Energy is to go ahead with the execution of the proposed product development and commercialization strategy plan under Phase II of this effort. Recent indicators show the emergence of micro-CHP. More than 12,000 micro-CHP systems have been sold worldwide so far, around 7,500 in 2004. Market projections predict a world-wide market growth over 35% per year. In 2004 the installations were mainly in Europe (73.5%) and in Japan (26.4%). The market in North-America is almost non-existent (0.1%). High energy consumption, high energy expenditure, large spark-spread (i.e., difference between electricity and fuel costs), big square footage, and high income are the key conditions for market acceptance. Today, these conditions are best found in the states of New York, Pennsylvania, New Jersey, Wisconsin, Illinois, Indiana, Michigan, Ohio, New England states. A multiple stage development plan is proposed to address risk mitigation. These stages include concept development and supplier engagement, component development, system integration, system demonstration, and field trials. A two stage commercialization strategy is suggested based on two product versions. The first version--a heat and power system named Micro-Cogen, provides the heat and essential electrical power to the homeowner. In its proposed embodiment, the system has a 2kW prime mover integrated to a furnace platform. The second version is a Micro-Trigen system with heating, cooling and power. It has the same Micro-Cogen platform integrated with a 14kW thermally activated chiller. A Stirling engine is suggested as a promising path for the prime mover. A LiBr absorption chiller is today's best technology in term of readiness level. Paybacks are acceptable for the Micro-Cogen version. However, there is no clear economically viable path for a Micro-Trigen version with today's available technology. This illustrates the importance of financial incentives to home owners in the initial stage of micro-CHP commercialization. It will help create the necessary conditions of volume demand to start transitioning to mass-production and cost reduction. Incentives to the manufacturers will help improve efficiency, enhance reliability, and lower cost, making micro-CHP products more attractive. Successful development of a micro-CHP system for residential applications has the potential to provide significant benefits to users, customers, manufacturers, and suppliers of such systems and, in general, to the nation as a whole. The benefits to the ultimate user are a comfortable and healthy home environment at an affordable cost, potential utility savings, and a reliable supply of energy. Manufacturers, component suppliers, and system integrators will see growth of a new market segment for integrated energy products. The benefits to the nation include significantly increased energy efficiency, reduced consumption of fossil fuels, pollutant and CO{sub 2} emissions from power generation, enhanced security from power interruptions as well as enhanced economic activity and job creation. An integrated micro-CHP energy system provides advantages over conventional power generation, since the energy is used more efficiently by means of efficient heat recovery. Foreign companies are readily selling products, mostly in Europe, and it is urgent to react promptly to these offerings that will soon emerge on the U.S

Timothy DeValve; Benoit Olsommer

2007-09-30T23:59:59.000Z

31

Distributed large-scale natural graph factorization  

Science Conference Proceedings (OSTI)

Natural graphs, such as social networks, email graphs, or instant messaging patterns, have become pervasive through the internet. These graphs are massive, often containing hundreds of millions of nodes and billions of edges. While some theoretical models ... Keywords: asynchronous algorithms, distributed optimization, graph algorithms, graph factorization, large-scale machine learning, matrix factorization

Amr Ahmed, Nino Shervashidze, Shravan Narayanamurthy, Vanja Josifovski, Alexander J. Smola

2013-05-01T23:59:59.000Z

32

Large-Scale PV Integration Study  

DOE Green Energy (OSTI)

This research effort evaluates the impact of large-scale photovoltaic (PV) and distributed generation (DG) output on NV Energy’s electric grid system in southern Nevada. It analyzes the ability of NV Energy’s generation to accommodate increasing amounts of utility-scale PV and DG, and the resulting cost of integrating variable renewable resources. The study was jointly funded by the United States Department of Energy and NV Energy, and conducted by a project team comprised of industry experts and research scientists from Navigant Consulting Inc., Sandia National Laboratories, Pacific Northwest National Laboratory and NV Energy.

Lu, Shuai; Etingov, Pavel V.; Diao, Ruisheng; Ma, Jian; Samaan, Nader A.; Makarov, Yuri V.; Guo, Xinxin; Hafen, Ryan P.; Jin, Chunlian; Kirkham, Harold; Shlatz, Eugene; Frantzis, Lisa; McClive, Timothy; Karlson, Gregory; Acharya, Dhruv; Ellis, Abraham; Stein, Joshua; Hansen, Clifford; Chadliev, Vladimir; Smart, Michael; Salgo, Richard; Sorensen, Rahn; Allen, Barbara; Idelchik, Boris

2011-07-29T23:59:59.000Z

33

Large-Scale Renewable Energy Guide  

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

Renewable Energy Guide Renewable Energy Guide Brad Gustafson, FEMP 2 Large-scale RE Guide Large-scale RE Guide: Developing Renewable Energy Projects Larger than 10 MWs at Federal Facilities Introduction and Overview Federal Utility Partnership Working Group May 22, 2013 Federal Energy Management Program Office of Energy Efficiency and Renewable Energy U.S. Department of Energy 3 Federal Energy Management Program FEMP works with key individuals to accomplish energy change within organizations by bringing expertise from all levels of project and policy implementation to enable Federal Agencies to meet energy related goals and to provide energy leadership to the country. 4 FEMP Renewable Energy * Works to increase the proportion of renewable energy in the Federal government's energy mix.

34

CHP, Waste Heat & District Energy  

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

CHP Technologies and Applications CHP Technologies and Applications 25 Oct 11 Today's Electric Grid What is CHP * ASHRAE Handbook: "Combined heat and power (CHP). Simultaneous production of electrical or mechanical energy and useful thermal energy from a single energy stream." * CHP is not a single technology but a suite of technologies that can use a variety of fuels to generate electricity or power at the point of use. * CHP technology can be deployed quickly, cost-effectively, and with few geographic limitations. 11/1/2011 Slide 6 5/20/11 Slide 7 What is CHP? * On-site generation of Power and Thermal Energy from a single fuel source * 'Conventional' grid based generators are located remote from thermal applications while CHP plants are located close to thermal applications

35

Strategies to Finance Large-Scale Deployment of Renewable Energy...  

Open Energy Info (EERE)

Large-Scale Deployment of Renewable Energy Projects: An Economic Development and Infrastructure Approach Jump to: navigation, search Name Strategies to Finance Large-Scale...

36

Large Scale Computing and Storage Requirements for Advanced Scientific...  

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

Large Scale Computing and Storage Requirements for Advanced Scientific Computing Research: Target 2014 ASCRFrontcover.png Large Scale Computing and Storage Requirements for...

37

MTC Envelope: Defining the Capability of Large Scale Computers...  

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

MTC Envelope: Defining the Capability of Large Scale Computers in the Context of Parallel Scripting Applications Title MTC Envelope: Defining the Capability of Large Scale...

38

Utility Perspective of mCHP  

Science Conference Proceedings (OSTI)

... Market Development ?Dedicated Natural Gas rates for CHP in NY ... Upstate NY ? 29 Mw steam turbine at Healthcare facility ...

2012-08-28T23:59:59.000Z

39

Pan China Puyang Biomass CHP Co Ltd | Open Energy Information  

Open Energy Info (EERE)

Puyang Biomass CHP Co Ltd Puyang Biomass CHP Co Ltd Jump to: navigation, search Name Pan-China(Puyang) Biomass CHP Co., Ltd. Place Puyang, Henan Province, China Zip 455000 Sector Biomass Product China based biomass project developer. Coordinates 29.459499°, 119.875023° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":29.459499,"lon":119.875023,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

40

The large scale clustering of radio sources  

E-Print Network (OSTI)

The observed two-point angular correlation function, w(theta), of mJy radio sources exhibits the puzzling feature of a power-law behaviour up to very large (almost 10 degrees) angular scales which cannot be accounted for in the standard hierarchical clustering scenario for any realistic redshift distribution of such sources. After having discarded the possibility that the signal can be explained by a high density local source population, we find no alternatives to assuming that - at variance with all the other extragalactic populations studied so far, and in particular with optically selected quasars - radio sources responsible for the large-scale clustering signal were increasingly less clustered with increasing look-back time, up to at least z=1. The data are accurately accounted for in terms of a bias function which decreases with increasing redshift, mirroring the evolution with cosmic time of the characteristic halo mass, M_{star}, entering the non linear regime. In the framework of the `concordance cosmology', the effective halo mass controlling the bias parameter is found to decrease from about 10^{15} M_{sun}/h at z=0 to the value appropriate for optically selected quasars, 10^{13} M_{sun}/h, at z=1.5. This suggests that, in the redshift range probed by the data, the clustering evolution of radio sources is ruled by the growth of large-scale structure, and that they are associated with the densest environments virializing at any cosmic epoch. The data provide only loose constraints on radio source clustering at z>1 so we cannot rule out the possibility that at these redshifts the clustering evolution of radio sources enters a different regime, perhaps similar to that found for optically selected quasars. The dependence of w(theta) on cosmological parameters is also discussed.

M. Negrello; M. Magliocchetti; G. De Zotti

2006-02-13T23:59:59.000Z

Note: This page contains sample records for the topic "large scale chp" 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

CHP Emissions Reduction Estimator | Open Energy Information  

Open Energy Info (EERE)

CHP Emissions Reduction Estimator CHP Emissions Reduction Estimator Jump to: navigation, search Tool Summary LAUNCH TOOL Name: CHP Emissions Reduction Estimator Agency/Company /Organization: United States Environmental Protection Agency Sector: Energy Focus Area: Buildings, Transportation, Industry Topics: GHG inventory, Co-benefits assessment Resource Type: Software/modeling tools User Interface: Spreadsheet Website: www.epa.gov/chp/basic/calculator.html Country: United States UN Region: Northern America CHP Emissions Reduction Estimator Screenshot References: http://www.epa.gov/chp/basic/calculator.html "This Emissions Estimator provides the amount of reduced emissions in terms of pounds of CO2, SO2, and NOX based on input from the User regarding the CHP technology being used. In turn the User will be provided with

42

Large Scale Quantum-mechanical Calculations of Proteins, Nanomaterials...  

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

Large Scale Quantum-mechanical Calculations of Proteins, Nanomaterials and Other Large Systems Event Sponsor: Leadership Computing Facility Seminar Start Date: Dec 5 2013 - 2:00pm...

43

Federal Energy Management Program: Large-scale Renewable Energy Projects  

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

Large-scale Large-scale Renewable Energy Projects (Larger than 10 MWs) to someone by E-mail Share Federal Energy Management Program: Large-scale Renewable Energy Projects (Larger than 10 MWs) on Facebook Tweet about Federal Energy Management Program: Large-scale Renewable Energy Projects (Larger than 10 MWs) on Twitter Bookmark Federal Energy Management Program: Large-scale Renewable Energy Projects (Larger than 10 MWs) on Google Bookmark Federal Energy Management Program: Large-scale Renewable Energy Projects (Larger than 10 MWs) on Delicious Rank Federal Energy Management Program: Large-scale Renewable Energy Projects (Larger than 10 MWs) on Digg Find More places to share Federal Energy Management Program: Large-scale Renewable Energy Projects (Larger than 10 MWs) on

44

Energy Department Loan Guarantee Would Support Large-Scale Rooftop...  

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

Loan Guarantee Would Support Large-Scale Rooftop Solar Power for U.S. Military Housing Energy Department Loan Guarantee Would Support Large-Scale Rooftop Solar Power for U.S....

45

Locations of Smart Grid Demonstration and Large-Scale Energy...  

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

Locations of Smart Grid Demonstration and Large-Scale Energy Storage Projects Locations of Smart Grid Demonstration and Large-Scale Energy Storage Projects Map of the United States...

46

Large Scale Computing and Storage Requirements for High Energy Physics  

E-Print Network (OSTI)

Director Editors Richard Gerber Harvey Wasserman NERSC UserServices Group NERSC User Services Group Large ScaleNERSC

Gerber, Richard A.

2011-01-01T23:59:59.000Z

47

Clean Hydrogen Producers Ltd CHP | Open Energy Information  

Open Energy Info (EERE)

Hydrogen Producers Ltd CHP Jump to: navigation, search Name Clean Hydrogen Producers Ltd (CHP) Place Geneva, Switzerland Zip 1209 Sector Hydro, Hydrogen, Solar Product Swiss...

48

Algorithms for Large-Scale Internet Measurements  

E-Print Network (OSTI)

As the Internet has grown in size and importance to society, it has become increasingly difficult to generate global metrics of interest that can be used to verify proposed algorithms or monitor performance. This dissertation tackles the problem by proposing several novel algorithms designed to perform Internet-wide measurements using existing or inexpensive resources. We initially address distance estimation in the Internet, which is used by many distributed applications. We propose a new end-to-end measurement framework called Turbo King (T-King) that uses the existing DNS infrastructure and, when compared to its predecessor King, obtains delay samples without bias in the presence of distant authoritative servers and forwarders, consumes half the bandwidth, and reduces the impact on caches at remote servers by several orders of magnitude. Motivated by recent interest in the literature and our need to find remote DNS nameservers, we next address Internet-wide service discovery by developing IRLscanner, whose main design objectives have been to maximize politeness at remote networks, allow scanning rates that achieve coverage of the Internet in minutes/hours (rather than weeks/months), and significantly reduce administrator complaints. Using IRLscanner and 24-hour scan durations, we perform 20 Internet-wide experiments using 6 different protocols (i.e., DNS, HTTP, SMTP, EPMAP, ICMP and UDP ECHO). We analyze the feedback generated and suggest novel approaches for reducing the amount of blowback during similar studies, which should enable researchers to collect valuable experimental data in the future with significantly fewer hurdles. We finally turn our attention to Intrusion Detection Systems (IDS), which are often tasked with detecting scans and preventing them; however, it is currently unknown how likely an IDS is to detect a given Internet-wide scan pattern and whether there exist sufficiently fast stealth techniques that can remain virtually undetectable at large-scale. To address these questions, we propose a novel model for the windowexpiration rules of popular IDS tools (i.e., Snort and Bro), derive the probability that existing scan patterns (i.e., uniform and sequential) are detected by each of these tools, and prove the existence of stealth-optimal patterns.

Leonard, Derek Anthony

2010-12-01T23:59:59.000Z

49

Implementing CHP in Louisiana: A Case Study  

E-Print Network (OSTI)

The objective of this research is to evaluate issues related to implementing CHP systems in Louisiana. A case study is used to show the system design, economic analysis and permitting process. The implementation process will focus on the air permitting and the utility interconnection agreements for rural Louisiana. The development of general guidelines on CHP implementation in Louisiana will provide insight to many potential CHP adopters in the state of Louisiana. The methodology used involves researching current Federal and Louisiana state policies that regulate the air permitting and utility regulation for CHP systems. After the appropriate air permits and qualification for grid connection are identified, the next step in the process of solving the problem will be to locate appropriate contacts within the appropriate agencies. The final step of the problem solving will be to interview the appropriate personnel to identify the procedures that each department follows to implement CHP systems.

Kozman, T. A.; Carriere, J. L.; Lee, J.

2009-05-01T23:59:59.000Z

50

Quantum noises and the large scale structure  

E-Print Network (OSTI)

We propose that cosmological density perturbation may originate from passive fluctuations of the inflaton, which are induced by colored quantum noise due to the coupling of the inflaton to the quantum environment. At small scales, the fluctuations grow with time to become nearly scale-invariant. However, the larger-scale modes cross out the horizon earlier and do not have enough time to grow, thus resulting in a suppression of the density perturbation. This may explain the observed low quadrupole in the CMB anisotropy data and and potentially unveil the initial time of inflation. We also discuss the implications to the running spectral index and the non-Gaussianity of the primordial density perturbation.

Wo-Lung Lee

2007-01-31T23:59:59.000Z

51

Activation of 200 MW refusegenerated CHP upward regulation effect (Smart  

Open Energy Info (EERE)

Activation of 200 MW refusegenerated CHP upward regulation effect Activation of 200 MW refusegenerated CHP upward regulation effect Country Denmark Headquarters Location Sønderborg, Denmark Coordinates 54.913811°, 9.792178° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":54.913811,"lon":9.792178,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

52

Large Scale Computing and Storage Requirements for Fusion Energy...  

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

at NERSC HPC Requirements Reviews Requirements for Science: Target 2014 Fusion Energy Sciences (FES) Large Scale Computing and Storage Requirements for Fusion Energy...

53

Solving large scale polynomial convex problems on \\ell_1/nuclear ...  

E-Print Network (OSTI)

Oct 24, 2012 ... Solving large scale polynomial convex problems on \\ell_1/nuclear norm balls by randomized first-order algorithms. Aharon Ben-Tal (abental ...

54

Large Scale Computing and Storage Requirements for Nuclear Physics Research  

E-Print Network (OSTI)

outlined in the 2011 DOE Strategic Plan†. † U.S. Departmentstrategic plans. Large Scale Computing and Storage Requirements for Nuclear Physics DOE  

Gerber, Richard A.

2012-01-01T23:59:59.000Z

55

Large Scale Computing and Storage Requirements for Basic Energy...  

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

at NERSC HPC Requirements Reviews Requirements for Science: Target 2014 Basic Energy Sciences (BES) Large Scale Computing and Storage Requirements for Basic Energy...

56

Large-Scale Aspects of the United States Hydrologic Cycle  

Science Conference Proceedings (OSTI)

A large-scale, gridpoint, atmospheric, hydrologic climatology consisting of atmospheric precipitable water, precipitation, atmospheric moisture flux convergence, and a residual evaporation for the conterminous United States is described. A large-...

John O. Roads; Shyh-C. Chen; Alexander K. Guetter; Konstantine P. Georgakakos

1994-09-01T23:59:59.000Z

57

LARGE-SCALE FLOWS IN PROMINENCE CAVITIES  

Science Conference Proceedings (OSTI)

Regions of rarefied density often form cavities above quiescent prominences. We observed two different cavities with the Coronal Multichannel Polarimeter on 2005 April 21 and with Hinode/EIS on 2008 November 8. Inside both of these cavities, we find coherent velocity structures based on spectral Doppler shifts. These flows have speeds of 5-10 km s{sup -1}, occur over length scales of tens of megameters, and persist for at least 1 hr. Flows in cavities are an example of the nonstatic nature of quiescent structures in the solar atmosphere.

Schmit, D. J. [Department of Astrophysical and Planetary Sciences, University of Colorado-Boulder, UCB 391, Boulder, CO 80309 (United States); Gibson, S. E.; Tomczyk, S. [High Altitude Observatory, National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307 (United States); Reeves, K. K. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, MS 58, Cambridge, MA 02138 (United States); Sterling, Alphonse C. [NASA Marshall Space Flight Center, Space Science Office, VP62, Huntsville, AL 35805 (United States); Brooks, D. H. [Space Science Division, Naval Research Laboratory, Washington, DC 20375 (United States); Williams, D. R. [Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey RH5 6NT (United Kingdom); Tripathi, D. [Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA (United Kingdom)

2009-08-01T23:59:59.000Z

58

Large Scale Weather Control Using Nuclear Reactors  

E-Print Network (OSTI)

It is pointed out that controlled release of thermal energy from fission type nuclear reactors can be used to alter weather patterns over significantly large geographical regions. (1) Nuclear heat creates a low pressure region, which can be used to draw moist air from oceans, onto deserts. (2) Creation of low pressure zones over oceans using Nuclear heat can lead to Controlled Cyclone Creation (CCC).(3) Nuclear heat can also be used to melt glaciers and control water flow in rivers.

Moninder Singh Modgil

2002-10-02T23:59:59.000Z

59

Goethite Bench-scale and Large-scale Preparation Tests  

SciTech Connect

The Hanford Waste Treatment and Immobilization Plant (WTP) is the keystone for cleanup of high-level radioactive waste from our nation's nuclear defense program. The WTP will process high-level waste from the Hanford tanks and produce immobilized high-level waste glass for disposal at a national repository, low activity waste (LAW) glass, and liquid effluent from the vitrification off-gas scrubbers. The liquid effluent will be stabilized into a secondary waste form (e.g. grout-like material) and disposed on the Hanford site in the Integrated Disposal Facility (IDF) along with the low-activity waste glass. The major long-term environmental impact at Hanford results from technetium that volatilizes from the WTP melters and finally resides in the secondary waste. Laboratory studies have indicated that pertechnetate ({sup 99}TcO{sub 4}{sup -}) can be reduced and captured into a solid solution of {alpha}-FeOOH, goethite (Um 2010). Goethite is a stable mineral and can significantly retard the release of technetium to the environment from the IDF. The laboratory studies were conducted using reaction times of many days, which is typical of environmental subsurface reactions that were the genesis of this new process. This study was the first step in considering adaptation of the slow laboratory steps to a larger-scale and faster process that could be conducted either within the WTP or within the effluent treatment facility (ETF). Two levels of scale-up tests were conducted (25x and 400x). The largest scale-up produced slurries of Fe-rich precipitates that contained rhenium as a nonradioactive surrogate for {sup 99}Tc. The slurries were used in melter tests at Vitreous State Laboratory (VSL) to determine whether captured rhenium was less volatile in the vitrification process than rhenium in an unmodified feed. A critical step in the technetium immobilization process is to chemically reduce Tc(VII) in the pertechnetate (TcO{sub 4}{sup -}) to Tc(Iv)by reaction with the ferrous ion, Fe{sup 2+}-Fe{sup 2+} is oxidized to Fe{sup 3+} - in the presence of goethite seed particles. Rhenium does not mimic that process; it is not a strong enough reducing agent to duplicate the TcO{sub 4}{sup -}/Fe{sup 2+} redox reactions. Laboratory tests conducted in parallel with these scaled tests identified modifications to the liquid chemistry necessary to reduce ReO{sub 4}{sup -} and capture rhenium in the solids at levels similar to those achieved by Um (2010) for inclusion of Tc into goethite. By implementing these changes, Re was incorporated into Fe-rich solids for testing at VSL. The changes also changed the phase of iron that was in the slurry product: rather than forming goethite ({alpha}-FeOOH), the process produced magnetite (Fe{sub 3}O{sub 4}). Magnetite was considered by Pacific Northwest National Laboratory (PNNL) and VSL to probably be a better product to improve Re retention in the melter because it decomposes at a higher temperature than goethite (1538 C vs. 136 C). The feasibility tests at VSL were conducted using Re-rich magnetite. The tests did not indicate an improved retention of Re in the glass during vitrification, but they did indicate an improved melting rate (+60%), which could have significant impact on HLW processing. It is still to be shown whether the Re is a solid solution in the magnetite as {sup 99}Tc was determined to be in goethite.

Josephson, Gary B.; Westsik, Joseph H.

2011-10-23T23:59:59.000Z

60

2 Large-Scale Data Sets  

E-Print Network (OSTI)

help in preparing this material. Computational Science ? Use of computer simulation as a tool for greater understanding of the real world – Complements experimentation and theory ? Problems are increasingly computationally challenging – Large parallel machines needed to perform calculations – Critical to leverage parallelism in all phases ? Data access is a huge challenge – Using parallelism to obtain performance – Finding usable, efficient, portable interfaces – Understanding and tuning I/O IBM BG/L system. Visualization of entropy in Terascale Supernova Initiative application. Image from Kwan-Liu Ma’s visualization team at UC Davis. Argonne National

Rob Ross; Thanks To Rob Latham; Rajeev Thakur; Marc Unangst; Brent Welch For Their

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "large scale chp" 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

A large scale study of text-messaging use  

Science Conference Proceedings (OSTI)

Text messaging has become a popular form of communication with mobile phones worldwide. We present findings from a large scale text messaging study of 70 university students in the United States. We collected almost 60, 000 text messages over a period ... Keywords: large-scale study, mobile device, short message service, sms, text messaging, texting

Agathe Battestini; Vidya Setlur; Timothy Sohn

2010-09-01T23:59:59.000Z

62

Large-Scale Eucalyptus Energy Farms and Power Cogeneration1  

E-Print Network (OSTI)

Large-Scale Eucalyptus Energy Farms and Power Cogeneration1 Robert C. Noronla2 The initiation of a large-scale cogeneration project, especially one that combines construction of the power generation supplemental fuel source must be sought if the cogeneration facility will consume more fuel than

Standiford, Richard B.

63

A Simulator for Large-Scale Parallel Computer Architectures  

Science Conference Proceedings (OSTI)

Efficient design of hardware and software for large-scale parallel execution requires detailed understanding of the interactions between the application, computer, and network. The authors have developed a macro-scale simulator SST/macro that permits ... Keywords: Computer Architecture Simulation, Macro-scale Simulator, Message Passing Interface, Network Congestion, Network Models

Helgi Adalsteinsson; Scott Cranford; David A. Evensky; Joseph P. Kenny; Jackson Mayo; Ali Pinar; Curtis L. Janssen

2010-04-01T23:59:59.000Z

64

Large-Scale Hydropower Basics | Department of Energy  

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

Large-Scale Hydropower Basics Large-Scale Hydropower Basics Large-Scale Hydropower Basics August 14, 2013 - 3:11pm Addthis Large-scale hydropower plants are generally developed to produce electricity for government or electric utility projects. These plants are more than 30 megawatts (MW) in size, and there is more than 80,000 MW of installed generation capacity in the United States today. Most large-scale hydropower projects use a dam and a reservoir to retain water from a river. When the stored water is released, it passes through and rotates turbines, which spin generators to produce electricity. Water stored in a reservoir can be accessed quickly for use during times when the demand for electricity is high. Dammed hydropower projects can also be built as power storage facilities.

65

Large-Scale Hydropower Basics | Department of Energy  

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

Large-Scale Hydropower Basics Large-Scale Hydropower Basics Large-Scale Hydropower Basics August 14, 2013 - 3:11pm Addthis Large-scale hydropower plants are generally developed to produce electricity for government or electric utility projects. These plants are more than 30 megawatts (MW) in size, and there is more than 80,000 MW of installed generation capacity in the United States today. Most large-scale hydropower projects use a dam and a reservoir to retain water from a river. When the stored water is released, it passes through and rotates turbines, which spin generators to produce electricity. Water stored in a reservoir can be accessed quickly for use during times when the demand for electricity is high. Dammed hydropower projects can also be built as power storage facilities.

66

The cube: a very large-scale interactive engagement space  

Science Conference Proceedings (OSTI)

"The Cube" is a unique facility that combines 48 large multi-touch screens and very large-scale projection surfaces to form one of the world's largest interactive learning and engagement spaces. The Cube facility is part of the Queensland University ... Keywords: interactive wall displays, multi-touch, very large displays

Markus Rittenbruch, Andrew Sorensen, Jared Donovan, Debra Polson, Michael Docherty, Jeff Jones

2013-10-01T23:59:59.000Z

67

DOE Completes Large-Scale Carbon Sequestration Project Awards | Department  

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

DOE Completes Large-Scale Carbon Sequestration Project Awards DOE Completes Large-Scale Carbon Sequestration Project Awards DOE Completes Large-Scale Carbon Sequestration Project Awards November 17, 2008 - 4:58pm Addthis Regional Partner to Demonstrate Safe and Permanent Storage of 2 Million Tons of CO2 at Wyoming Site WASHINGTON, DC - Completing a series of awards through its Regional Carbon Sequestration Partnership Program, the U.S. Department of Energy (DOE) today awarded $66.9 million to the Big Sky Regional Carbon Sequestration Partnership for the Department's seventh large-scale carbon sequestration project. Led by Montana State University-Bozeman, the Partnership will conduct a large-volume test in the Nugget Sandstone formation to demonstrate the ability of a geologic formation to safely, permanently and economically

68

DOE Completes Large-Scale Carbon Sequestration Project Awards | Department  

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

Completes Large-Scale Carbon Sequestration Project Awards Completes Large-Scale Carbon Sequestration Project Awards DOE Completes Large-Scale Carbon Sequestration Project Awards November 17, 2008 - 4:58pm Addthis Regional Partner to Demonstrate Safe and Permanent Storage of 2 Million Tons of CO2 at Wyoming Site WASHINGTON, DC - Completing a series of awards through its Regional Carbon Sequestration Partnership Program, the U.S. Department of Energy (DOE) today awarded $66.9 million to the Big Sky Regional Carbon Sequestration Partnership for the Department's seventh large-scale carbon sequestration project. Led by Montana State University-Bozeman, the Partnership will conduct a large-volume test in the Nugget Sandstone formation to demonstrate the ability of a geologic formation to safely, permanently and economically

69

Energy Department Applauds Nation's First Large-Scale Industrial Carbon  

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

Nation's First Large-Scale Industrial Nation's First Large-Scale Industrial Carbon Capture and Storage Facility Energy Department Applauds Nation's First Large-Scale Industrial Carbon Capture and Storage Facility August 24, 2011 - 6:23pm Addthis Washington, D.C. - The U.S. Department of Energy issued the following statement in support of today's groundbreaking for construction of the nation's first large-scale industrial carbon capture and storage (ICCS) facility in Decatur, Illinois. Supported by the 2009 economic stimulus legislation - the American Recovery and Reinvestment Act - the ambitious project will capture and store one million tons of carbon dioxide (CO2) per year produced as the result of processing corn into fuel-grade ethanol from the nearby Archer Daniels Midland biofuels plant. Since all of

70

ARM - Evaluation Product - Vertical Air Motion during Large-Scale  

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

ProductsVertical Air Motion during Large-Scale ProductsVertical Air Motion during Large-Scale Stratiform Rain Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Evaluation Product : Vertical Air Motion during Large-Scale Stratiform Rain Site(s) NIM SGP General Description The Vertical Air Motion during Large-Scale Stratiform Rain (VERVELSR) value-added product (VAP) uses the unique properties of a 95-GHz radar Doppler velocity spectra to produce vertical profiles of air motion during low-to-moderate (1-20 mm/hr) rainfall events It is designed to run at ARM sites that include a W-band ARM cloud radar (WACR) radar with spectra data processing. The VERVELSR VAP, based on the work of Giangrande et al. (2010), operates by exploiting a resonance effect that occurs in

71

Energy Department Applauds Nation's First Large-Scale Industrial Carbon  

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

Energy Department Applauds Nation's First Large-Scale Industrial Energy Department Applauds Nation's First Large-Scale Industrial Carbon Capture and Storage Facility Energy Department Applauds Nation's First Large-Scale Industrial Carbon Capture and Storage Facility August 24, 2011 - 6:23pm Addthis Washington, D.C. - The U.S. Department of Energy issued the following statement in support of today's groundbreaking for construction of the nation's first large-scale industrial carbon capture and storage (ICCS) facility in Decatur, Illinois. Supported by the 2009 economic stimulus legislation - the American Recovery and Reinvestment Act - the ambitious project will capture and store one million tons of carbon dioxide (CO2) per year produced as the result of processing corn into fuel-grade ethanol from the nearby Archer Daniels Midland biofuels plant. Since all of

72

Large-Scale Industrial Carbon Capture, Storage Plant Begins Construction |  

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

Large-Scale Industrial Carbon Capture, Storage Plant Begins Large-Scale Industrial Carbon Capture, Storage Plant Begins Construction Large-Scale Industrial Carbon Capture, Storage Plant Begins Construction August 24, 2011 - 1:00pm Addthis Washington, DC - Construction activities have begun at an Illinois ethanol plant that will demonstrate carbon capture and storage. The project, sponsored by the U.S. Department of Energy's Office of Fossil Energy, is the first large-scale integrated carbon capture and storage (CCS) demonstration project funded by the American Recovery and Reinvestment Act (ARRA) to move into the construction phase. Led by the Archer Daniels Midland Company (ADM), a member of DOE's Midwest Geological Sequestration Consortium, the Illinois-ICCS project is designed to sequester approximately 2,500 metric tons of carbon dioxide

73

Large-Scale Industrial Carbon Capture, Storage Plant Begins Construction |  

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

Large-Scale Industrial Carbon Capture, Storage Plant Begins Large-Scale Industrial Carbon Capture, Storage Plant Begins Construction Large-Scale Industrial Carbon Capture, Storage Plant Begins Construction August 24, 2011 - 1:00pm Addthis Washington, DC - Construction activities have begun at an Illinois ethanol plant that will demonstrate carbon capture and storage. The project, sponsored by the U.S. Department of Energy's Office of Fossil Energy, is the first large-scale integrated carbon capture and storage (CCS) demonstration project funded by the American Recovery and Reinvestment Act (ARRA) to move into the construction phase. Led by the Archer Daniels Midland Company (ADM), a member of DOE's Midwest Geological Sequestration Consortium, the Illinois-ICCS project is designed to sequester approximately 2,500 metric tons of carbon dioxide

74

Materialized community ground models for large-scale earthquake simulation  

Science Conference Proceedings (OSTI)

Large-scale earthquake simulation requires source datasets which describe the highly heterogeneous physical characteristics of the earth in the region under simulation. Physical characteristic datasets are the first stage in a simulation pipeline which ...

Steven W. Schlosser; Michael P. Ryan; Ricardo Taborda; Julio López; David R. O'Hallaron; Jacobo Bielak

2008-11-01T23:59:59.000Z

75

Advanced concepts in large-scale network simulation  

Science Conference Proceedings (OSTI)

This tutorial paper reviews existing concepts and future directions in selected areas related to simulation of large-scale networks. It covers specifically topics in traffic modeling, simulation of routing, network emulation, and real-time simulation.

David M. Nicol; Michael Liljenstam; Jason Liu

2005-12-01T23:59:59.000Z

76

Large-Scale Meteorology and Deep Convection during TRMM KWAJEX  

Science Conference Proceedings (OSTI)

An overview of the large-scale behavior of the atmosphere during the Tropical Rainfall Measuring Mission (TRMM) Kwajalein Experiment (KWAJEX) is presented. Sounding and ground radar data collected during KWAJEX, and several routinely available ...

Adam H. Sobel; Sandra E. Yuter; Christopher S. Bretherton; George N. Kiladis

2004-02-01T23:59:59.000Z

77

Data mining techniques for large-scale gene expression analysis  

E-Print Network (OSTI)

Modern computational biology is awash in large-scale data mining problems. Several high-throughput technologies have been developed that enable us, with relative ease and little expense, to evaluate the coordinated expression ...

Palmer, Nathan Patrick

2011-01-01T23:59:59.000Z

78

Infrastructure for large-scale tests in marine autonomy  

E-Print Network (OSTI)

This thesis focuses on the development of infrastructure for research with large-scale autonomous marine vehicle fleets and the design of sampling trajectories for compressive sensing (CS). The newly developed infrastructure ...

Hummel, Robert A. (Robert Andrew)

2012-01-01T23:59:59.000Z

79

Platforms and real options in large-scale engineering systems  

E-Print Network (OSTI)

This thesis introduces a framework and two methodologies that enable engineering management teams to assess the value of real options in programs of large-scale, partially standardized systems implemented a few times over ...

Kalligeros, Konstantinos C., 1976-

2006-01-01T23:59:59.000Z

80

Technoeconomic Evaluation of Large-Scale Electrolytic Hydrogen Production Technologies  

Science Conference Proceedings (OSTI)

Large-scale production of electrolytic hydrogen and oxygen could increase use of baseload and off-peak surplus power. To be competitive, however, water electrolysis will require low-cost electricity.

1985-09-20T23:59:59.000Z

Note: This page contains sample records for the topic "large scale chp" 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

Decomposition methods for large scale stochastic and robust optimization problems  

E-Print Network (OSTI)

We propose new decomposition methods for use on broad families of stochastic and robust optimization problems in order to yield tractable approaches for large-scale real world application. We introduce a new type of a ...

Becker, Adrian Bernard Druke

2011-01-01T23:59:59.000Z

82

Student Pages: RFP-Large-Scale Diversion of Water  

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

Supplying Our Water Needs H2O Request For Proposal Large Scale Diversion of Water U.S. Army Corp of Engineers-Chicago District online Be sure to submit the online sign-off each...

83

On solving large scale polynomial convex problems by randomized ...  

E-Print Network (OSTI)

plications), the (unimprovable in the large-scale case) rate of convergence of FOM's ...... mjnj min[mj,nj]) a.o.) and eigenvalue decomposition of a matrix from Sm.

84

Large-Scale Industrial CCS Projects Selected for Continued Testing |  

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

Large-Scale Industrial CCS Projects Selected for Continued Testing Large-Scale Industrial CCS Projects Selected for Continued Testing Large-Scale Industrial CCS Projects Selected for Continued Testing June 10, 2010 - 1:00pm Addthis Washington, DC - Three Recovery Act funded projects have been selected by the U.S. Department of Energy (DOE) to continue testing large-scale carbon capture and storage (CCS) from industrial sources. The projects - located in Texas, Illinois, and Louisiana - were initially selected for funding in October 2009 as part of a $1.4 billion effort to capture carbon dioxide (CO2) from industrial sources for storage or beneficial use. The first phase of research and development (R&D) included $21.6 million in Recovery Act funding and $22.5 million in private funding for a total initial investment of $44.1 million.

85

DOE Awards First Three Large-Scale Carbon Sequestration Projects |  

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

First Three Large-Scale Carbon Sequestration Projects First Three Large-Scale Carbon Sequestration Projects DOE Awards First Three Large-Scale Carbon Sequestration Projects October 9, 2007 - 3:14pm Addthis U.S. Projects Total $318 Million and Further President Bush's Initiatives to Advance Clean Energy Technologies to Confront Climate Change WASHINGTON, DC - In a major step forward for demonstrating the promise of clean energy technology, U.S Deputy Secretary of Energy Clay Sell today announced that the Department of Energy (DOE) awarded the first three large-scale carbon sequestration projects in the United States and the largest single set in the world to date. The three projects - Plains Carbon Dioxide Reduction Partnership; Southeast Regional Carbon Sequestration Partnership; and Southwest Regional Partnership for Carbon

86

Lessons from Large-Scale Renewable Energy Integration Studies: Preprint  

Science Conference Proceedings (OSTI)

In general, large-scale integration studies in Europe and the United States find that high penetrations of renewable generation are technically feasible with operational changes and increased access to transmission. This paper describes other key findings such as the need for fast markets, large balancing areas, system flexibility, and the use of advanced forecasting.

Bird, L.; Milligan, M.

2012-06-01T23:59:59.000Z

87

A holonic approach to model and deploy large scale simulations  

Science Conference Proceedings (OSTI)

Multi-Agent Based Simulations (MABS) for real-world problems may require a large number of agents. A possible solution is to distribute the simulation in multiple machines. Thus, we are forced to consider how Large Scale MABS can be deployed in order ...

Sebastian Rodriguez; Vincent Hilaire; Abder Koukam

2006-05-01T23:59:59.000Z

88

Computational challenges in large-scale air pollution modelling  

Science Conference Proceedings (OSTI)

Many difficulties must be overcome when large-scale air pollution models are treated numerically, because the physical and chemical processes in the atmosphere are very fast. This is why it is necessary to use a large space domain in order ... Keywords: air pollution models, finite elements, ordinary differential equations, parallel computational, partial differential equations, quasi-steady-state-approximation

Tzvetan Ostromsky; Wojciech Owczarz; Zahari Zlatev

2001-06-01T23:59:59.000Z

89

Recent Developments in CHP Policy in the United States  

E-Print Network (OSTI)

Combined Heat and Power (CHP), also known as cogeneration, refers to one of several technologies that allow a facility to generate electricity and useful heat simultaneously. It is highly efficient compared to conventional methods of generating heat and power separately. However, various market and policy barriers exist that prevent CHP from being more widely adopted. This paper provides an introduction to CHP and its benefits and an overview of the current CHP market, followed by an assessment of recent developments in CHP policy at the state level across the United States. New trends in CHP policy are highlighted, included an increase in the number of states that include CHP in their energy efficiency standards and the increased attention being paid to CHP's resiliency during times of disaster.

Farley, K.; Chittum, A.

2013-01-01T23:59:59.000Z

90

ENERGY ANALYSIS OF A MICRO-CHP DEMONSTRATION FACILITY.  

E-Print Network (OSTI)

?? Cooling, Heating, and Power (CHP) systems have been around for decades, but systems that utilize 20 kW or less, designated as Micro-CHP, are relatively… (more)

Giffin, Paxton Keith

2010-01-01T23:59:59.000Z

91

Micro-CHP Modeling and Simulation using Thermodynamic Cycles.  

E-Print Network (OSTI)

??This thesis discusses the thermoeconomic modeling and simulation of micro-CHP systems powered by various prime movers. Micro Cooling, Heating, and Power (micro-CHP) is becoming an… (more)

Moran, Alan Mark

2006-01-01T23:59:59.000Z

92

Large Scale Quantum-mechanical Calculations of Proteins, Nanomaterials and  

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

Large Scale Quantum-mechanical Calculations of Proteins, Nanomaterials and Large Scale Quantum-mechanical Calculations of Proteins, Nanomaterials and Other Large Systems Event Sponsor: Leadership Computing Facility Seminar Start Date: Dec 5 2013 - 2:00pm Building/Room: Building 240/Room 4301 Location: Argonne National Laboratory Speaker(s): Dmitri G. Fedorov Speaker(s) Title: National Institute of Advanced Industrial Science and Technology (AIST) Host: Yuri Alexeev Our approach to large scale calculations is based on fragmenting a molecular system into pieces, and performing quantum-mechanical calculations of these fragments and their pairs in the fragment molecular orbital method (FMO). After a brief summary of the methodology, some typical applications to protein-ligand complexes, chemical reactions in explicit solvent, and nanomaterials (silicon nanowires, zeolites.

93

Research, Development and Demonstration of Micro-CHP Systems for Residential Applications - Phase I  

Science Conference Proceedings (OSTI)

The objective of the Micro-CHP Phase I effort was to develop a conceptual design for a Micro-CHP system including: Defining market potential; Assessing proposed technology; Developing a proof-of-principle design; and Developing a commercialization strategy. TIAX LLC assembled a team to develop a Micro-CHP system that will provide electricity and heating. TIAX, the contractor and major cost-share provider, provided proven expertise in project management, prime-mover design and development, appliance development and commercialization, analysis of residential energy loads, technology assessment, and market analysis. Kohler Company, the manufacturing partner, is a highly regarded manufacturer of standby power systems and other residential products. Kohler provides a compellingly strong brand, along with the capabilities in product development, design, manufacture, distribution, sales, support, service, and marketing that only a manufacturer of Kohler's status can provide. GAMA, an association of appliance and equipment manufacturers, provided a critical understanding of appliance commercialization issues, including regulatory requirements, large-scale market acceptance issues, and commercialization strategies. The Propane Education & Research Council, a cost-share partner, provided cost share and aided in ensuring the fuel flexibility of the conceptual design. Micro-CHP systems being commercialized in Europe and Japan are generally designed to follow the household thermal load, and generate electricity opportunistically. In many cases, any excess electricity can be sold back to the grid (net metering). These products, however, are unlikely to meet the demands of the U.S. market. First, these products generally cannot provide emergency power when grid power is lost--a critical feature to market success in the U.S. Even those that can may have insufficient electric generation capacities to meet emergency needs for many U.S. homes. Second, the extent to which net metering will be available in the U.S. is unclear. Third, these products are typically not designed for use in households having forced hot-air heating, which is the dominant heating system in the U.S. The U.S. market will also require a major manufacturer that has the reputation and brand recognition, low-cost manufacturing capability, distribution, sales, and service infrastructure, and marketing power to achieve significant market size with a previously unknown and unproven product. History has proven time and time again that small-to-medium-size manufacturers do not have the resources and capabilities to achieve significant markets with such products. During the Phase I effort, the Team developed a conceptual design for a Micro-CHP system that addresses key DOE and U.S. market needs: (1) Provides emergency power adequate for critical household loads, with none of the key drawbacks associated with typical, low-cost emergency generators, such as liquid fuel storage, inability to power ''hard-wired'' loads, need to run temporary extension cords for plug loads, manual set up required, susceptibility to overload, and risk of failure due to lack of maintenance and infrequent operation; (2) Requires no special skills to install--plumbers, electricians and HVAC technicians will typically have all necessary skills; (3) Can be used with the major residential fuels in the U.S., including natural gas and propane, and can be easily adapted to fuel oil as well as emerging fuels as they become available; and (4) Significantly reduces household energy consumption and energy costs.

Robert A. Zogg

2011-03-14T23:59:59.000Z

94

Combined Heat and Power Systems (CHP): Capabilities (Fact Sheet)  

SciTech Connect

D&MT Capabilities fact sheet that describes the NREL capabilities related to combined heat and power (CHP).

Not Available

2013-07-01T23:59:59.000Z

95

The Phoenix series large scale LNG pool fire experiments.  

SciTech Connect

The increasing demand for natural gas could increase the number and frequency of Liquefied Natural Gas (LNG) tanker deliveries to ports across the United States. Because of the increasing number of shipments and the number of possible new facilities, concerns about the potential safety of the public and property from an accidental, and even more importantly intentional spills, have increased. While improvements have been made over the past decade in assessing hazards from LNG spills, the existing experimental data is much smaller in size and scale than many postulated large accidental and intentional spills. Since the physics and hazards from a fire change with fire size, there are concerns about the adequacy of current hazard prediction techniques for large LNG spills and fires. To address these concerns, Congress funded the Department of Energy (DOE) in 2008 to conduct a series of laboratory and large-scale LNG pool fire experiments at Sandia National Laboratories (Sandia) in Albuquerque, New Mexico. This report presents the test data and results of both sets of fire experiments. A series of five reduced-scale (gas burner) tests (yielding 27 sets of data) were conducted in 2007 and 2008 at Sandia's Thermal Test Complex (TTC) to assess flame height to fire diameter ratios as a function of nondimensional heat release rates for extrapolation to large-scale LNG fires. The large-scale LNG pool fire experiments were conducted in a 120 m diameter pond specially designed and constructed in Sandia's Area III large-scale test complex. Two fire tests of LNG spills of 21 and 81 m in diameter were conducted in 2009 to improve the understanding of flame height, smoke production, and burn rate and therefore the physics and hazards of large LNG spills and fires.

Simpson, Richard B.; Jensen, Richard Pearson; Demosthenous, Byron; Luketa, Anay Josephine; Ricks, Allen Joseph; Hightower, Marion Michael; Blanchat, Thomas K.; Helmick, Paul H.; Tieszen, Sheldon Robert; Deola, Regina Anne; Mercier, Jeffrey Alan; Suo-Anttila, Jill Marie; Miller, Timothy J.

2010-12-01T23:59:59.000Z

96

Biomass DHP/ CHP benefits at local and regional level  

E-Print Network (OSTI)

Biomass DHP/ CHP ­ benefits at local and regional level Krzysztof Gierulski EC Baltic RenewableEnergy Workshop, Brussels 01.07.2002 #12;Biomass DHP/ CHP in Poland n Plan of the presentation n Promotion and dissemination of best practices (,,Promotion of conversion to biomass CHP at larger sites in PL", OPET) n

97

Large scale meteorological influence during the Geysers 1979 field experiment  

DOE Green Energy (OSTI)

A series of meteorological field measurements conducted during July 1979 near Cobb Mountain in Northern California reveals evidence of several scales of atmospheric circulation consistent with the climatic pattern of the area. The scales of influence are reflected in the structure of wind and temperature in vertically stratified layers at a given observation site. Large scale synoptic gradient flow dominates the wind field above about twice the height of the topographic ridge. Below that there is a mixture of effects with evidence of a diurnal sea breeze influence and a sublayer of katabatic winds. The July observations demonstrate that weak migratory circulations in the large scale synoptic meteorological pattern have a significant influence on the day-to-day gradient winds and must be accounted for in planning meteorological programs including tracer experiments.

Barr, S.

1980-01-01T23:59:59.000Z

98

Breakthrough Large-Scale Industrial Project Begins Carbon Capture and  

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

Breakthrough Large-Scale Industrial Project Begins Carbon Capture Breakthrough Large-Scale Industrial Project Begins Carbon Capture and Utilization Breakthrough Large-Scale Industrial Project Begins Carbon Capture and Utilization January 25, 2013 - 12:00pm Addthis Washington, DC - A breakthrough carbon capture, utilization, and storage (CCUS) project in Texas has begun capturing carbon dioxide (CO2) and piping it to an oilfield for use in enhanced oil recovery (EOR). Read the project factsheet The project at Air Products and Chemicals hydrogen production facility in Port Arthur, Texas, is significant for demonstrating both the effectiveness and commercial viability of CCUS technology as an option in helping mitigate atmospheric CO2 emissions. Funded in part through the American Recovery and Reinvestment Act (ARRA), the project is managed by the U.S.

99

Breakthrough Large-Scale Industrial Project Begins Carbon Capture and  

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

Breakthrough Large-Scale Industrial Project Begins Carbon Capture Breakthrough Large-Scale Industrial Project Begins Carbon Capture and Utilization Breakthrough Large-Scale Industrial Project Begins Carbon Capture and Utilization January 25, 2013 - 12:00pm Addthis Washington, DC - A breakthrough carbon capture, utilization, and storage (CCUS) project in Texas has begun capturing carbon dioxide (CO2) and piping it to an oilfield for use in enhanced oil recovery (EOR). Read the project factsheet The project at Air Products and Chemicals hydrogen production facility in Port Arthur, Texas, is significant for demonstrating both the effectiveness and commercial viability of CCUS technology as an option in helping mitigate atmospheric CO2 emissions. Funded in part through the American Recovery and Reinvestment Act (ARRA), the project is managed by the U.S.

100

COMMENTS OF THE LARGE-SCALE SOLAR ASSOCIATION TO DEPARTMENT  

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

COMMENTS OF THE LARGE-SCALE SOLAR ASSOCIATION TO DEPARTMENT COMMENTS OF THE LARGE-SCALE SOLAR ASSOCIATION TO DEPARTMENT OF ENERGY'S RAPID RESPONSE TEAM FOR TRANSMISSION'S REQUEST FOR INFORMATION Submitted by electronic mail to: Lamont.Jackson@hq.doe.gov The Large-scale Solar Association appreciates this opportunity to respond to the Department of Energy's (DOE) Rapid Response Team for Transmission's (RRTT) Request for Information. 1 We applaud the DOE for creating the RRTT and continuing to advance the efforts already made under the Memorandum of Understanding (MOU) entered into by nine Federal agencies in 2009 to expedite electric transmission construction. We also applaud the federal and state agencies that have expanded the Renewable Energy Policy Group and the Renewable Energy Action Team in California to focus on transmission, and hope that the tremendous

Note: This page contains sample records for the topic "large scale chp" 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

Nevada Weatherizes Large-Scale Complex | Department of Energy  

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

Nevada Weatherizes Large-Scale Complex Nevada Weatherizes Large-Scale Complex Nevada Weatherizes Large-Scale Complex July 1, 2010 - 10:11am Addthis What does this project do? This nonprofit weatherized a 22-unit low-income multifamily complex, reducing the building's duct leakage from 90 percent to just 5 percent. The weatherization program of the Rural Nevada Development Corporation (RNDC) reached a recent success in its eleven counties-wide territory. In June, the nonprofit finished weatherizing a 22-unit low-income multifamily complex, reducing the building's duct leakage from 90 percent to just 5 percent. "That is one big savings and is why I am proud of this project," says Dru Simerson, RNDC Weatherization Manager. RNDC's crew replaced all windows and 17 furnaces and installed floor

102

PHASE TRANSITION GENERATED COSMOLOGICAL MAGNETIC FIELD AT LARGE SCALES  

SciTech Connect

We constrain a primordial magnetic field (PMF) generated during a phase transition (PT) using the big bang nucleosynthesis bound on the relativistic energy density. The amplitude of the PMF at large scales is determined by the shape of the PMF spectrum outside its maximal correlation length scale. Even if the amplitude of the PMF at 1 Mpc is small, PT-generated PMFs can leave observable signatures in the potentially detectable relic gravitational wave background if a large enough fraction (1%-10%) of the thermal energy is converted into the PMF.

Kahniashvili, Tina [McWilliams Center for Cosmology and Department of Physics, Carnegie Mellon University, 5000 Forbes Ave., Pittsburgh, PA 15213 (United States); Tevzadze, Alexander G. [Abastumani Astrophysical Observatory, Ilia State University, 2A Kazbegi Ave., Tbilisi 0160 (Georgia); Ratra, Bharat, E-mail: tinatin@phys.ksu.edu, E-mail: aleko@tevza.org, E-mail: ratra@phys.ksu.edu [Department of Physics, Kansas State University, 116 Cardwell Hall, Manhattan, KS 66506 (United States)

2011-01-10T23:59:59.000Z

103

Metal hydride based isotope separation: Large-scale operations  

DOE Green Energy (OSTI)

A program to develop a metal hydride based hydrogen isotope separation process began at the Savannah River Laboratory in 1980. This semi-continuous gas chromatographic separation process will be used in new tritium facilities at the Savannah River Site. A tritium production unit is scheduled to start operation in 1993. An experimental, large-scale unit is currently being tested using protium and deuterium. Operation of the large-scale unit has demonstrated separation of mixed hydrogen isotopes (55% protium and 45% deuterium), resulting in protium and deuterium product streams with purities better than 99.5%. 3 refs., 4 figs.

Horen, A.S.; Lee, Myung W.

1991-01-01T23:59:59.000Z

104

Metal hydride based isotope separation: Large-scale operations  

DOE Green Energy (OSTI)

A program to develop a metal hydride based hydrogen isotope separation process began at the Savannah River Laboratory in 1980. This semi-continuous gas chromatographic separation process will be used in new tritium facilities at the Savannah River Site. A tritium production unit is scheduled to start operation in 1993. An experimental, large-scale unit is currently being tested using protium and deuterium. Operation of the large-scale unit has demonstrated separation of mixed hydrogen isotopes (55% protium and 45% deuterium), resulting in protium and deuterium product streams with purities better than 99.5%. 3 refs., 4 figs.

Horen, A.S.; Lee, Myung W.

1991-12-31T23:59:59.000Z

105

Safety aspects of large-scale handling of hydrogen  

DOE Green Energy (OSTI)

Since the decade of the 1950s, there has been a large increase in the quantity of hydrogen, especially liquid hydrogen, that has been produced, transported, and used. The technology of hydrogen, as it relates to safety, has also developed at the same time. The possible sources of hazards that can arise in the large-scale handling of hydrogen are recognized, and for the most part, sufficiently understood. These hazard sources are briefly discussed. 26 refs., 4 figs.

Edeskuty, F.J.; Stewart, W.F.

1988-01-01T23:59:59.000Z

106

List of CHP/Cogeneration Incentives | Open Energy Information  

Open Energy Info (EERE)

CHP/Cogeneration Incentives CHP/Cogeneration Incentives Jump to: navigation, search The following contains the list of 279 CHP/Cogeneration Incentives. CSV (rows 1 - 279) Incentive Incentive Type Place Applicable Sector Eligible Technologies Active Advanced Energy Fund (Ohio) Public Benefits Fund Ohio Commercial Industrial Institutional Residential Utility Biomass CHP/Cogeneration Fuel Cells Fuel Cells using Renewable Fuels Geothermal Electric Hydroelectric energy Landfill Gas Microturbines Municipal Solid Waste Photovoltaics Solar Space Heat Solar Thermal Electric Solar Water Heat Wind energy Yes Advanced Energy Gross Receipts Tax Deduction (New Mexico) Sales Tax Incentive New Mexico Commercial Construction Installer/Contractor Retail Supplier CHP/Cogeneration Geothermal Electric Photovoltaics

107

A root cause localization model for large scale systems  

Science Conference Proceedings (OSTI)

Root cause localization, the process of identifying the source of problems in a system using purely external observations, is a significant challenge in many large-scale systems. In this paper, we propose an abstract model that captures the common issues ...

Emre Kiciman; Lakshminarayanan Subramanian

2005-06-01T23:59:59.000Z

108

Predictive discrete latent factor models for large scale dyadic data  

Science Conference Proceedings (OSTI)

We propose a novel statistical method to predict large scale dyadic response variables in the presence of covariate information. Our approach simultaneously incorporates the effect of covariates and estimates local structure that is induced by interactions ... Keywords: co-clustering, dyadic data, generalized linear regression, latent factor modeling

Deepak Agarwal; Srujana Merugu

2007-08-01T23:59:59.000Z

109

Chukwa: a system for reliable large-scale log collection  

Science Conference Proceedings (OSTI)

Large Internet services companies like Google, Yahoo, and Facebook use the MapReduce programming model to process log data. MapReduce is designed to work on data stored in a distributed filesystem like Hadoop's HDFS. As a result, a number of log collection ... Keywords: logging, research, scale

Ariel Rabkin; Randy Katz

2010-11-01T23:59:59.000Z

110

Believability in simplifications of large scale physically based simulation  

Science Conference Proceedings (OSTI)

We verify two hypotheses which are assumed to be true only intuitively in many rigid body simulations. I: In large scale rigid body simulation, viewers may not be able to perceive distortion incurred by an approximated simulation method. II: ... Keywords: 3D graphics and realism, animation, physically based simulation

Donghui Han; Shu-wei Hsu; Ann McNamara; John Keyser

2013-08-01T23:59:59.000Z

111

In Situ Visualization for Large-Scale Combustion Simulations  

Science Conference Proceedings (OSTI)

As scientific supercomputing moves toward petascale and exascale levels, in situ visualization stands out as a scalable way for scientists to view the data their simulations generate. This full picture is crucial particularly for capturing and understanding ... Keywords: in situ visualization, large-scale simulation, parallel rendering, supercomputing, scalability, computer graphics, graphics and multimedia

Hongfeng Yu; Chaoli Wang; Ray W. Grout; Jacqueline H. Chen; Kwan-Liu Ma

2010-05-01T23:59:59.000Z

112

A steady-state L-mode tokamak fusion reactor : large scale and minimum scale.  

E-Print Network (OSTI)

??We perform extensive analysis on the physics of L-mode tokamak fusion reactors to identify (1) a favorable parameter space for a large scale steady-state reactor… (more)

Reed, Mark W. (Mark Wilbert)

2010-01-01T23:59:59.000Z

113

Linearly scaling 3D fragment method for large-scale electronic structure calculations  

Science Conference Proceedings (OSTI)

We present a new linearly scaling three-dimensional fragment (LS3DF) method for large scale ab initio electronic structure calculations. LS3DF is based on a divide-and-conquer approach, which incorporates a novel patching scheme that effectively ...

Lin-Wang Wang; Byounghak Lee; Hongzhang Shan; Zhengji Zhao; Juan Meza; Erich Strohmaier; David H. Bailey

2008-11-01T23:59:59.000Z

114

A steady-state L-mode tokamak fusion reactor : large scale and minimum scale  

E-Print Network (OSTI)

We perform extensive analysis on the physics of L-mode tokamak fusion reactors to identify (1) a favorable parameter space for a large scale steady-state reactor and (2) an operating point for a minimum scale steady-state ...

Reed, Mark W. (Mark Wilbert)

2010-01-01T23:59:59.000Z

115

The Large Scale Biosphere-Atmosphere Experiment in Amazonia (LBA)  

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

LBA (Amazon) LBA (Amazon) The Large Scale Biosphere-Atmosphere Experiment in Amazonia (LBA) Overview [LBA Logo] The Large-Scale Biosphere-Atmosphere Experiment in Amazonia (LBA) is an international research initiative conducted from 1995-2005 and led by Brazil. The LBA Project encompasses several scientific disciplines, or components. The LBA-ECO component focuses on the question: "How do tropical forest conversion, regrowth, and selective logging influence carbon storage, nutrient dynamics, trace gas fluxes, and the prospect for sustainable land use in Amazonia?" The Amazon rain forest or Amazonia, is the largest remaining expanse of tropical rain forest on Earth, harboring approximately one-third of all Earth's species. Although the rain forest's area is so large that it

116

Large Scale Deployment of Renewables for Electricity Generation  

E-Print Network (OSTI)

-cellulose material. Anaerobic digestion or gasification of biomass produces gas that can be used in similar applications to natural gas. Small-scale biogas production is now a well-established technology and large-scale application is in the advanced stages... of development. The possibility of using biogas in fuel cells exists, but there are a number of technical difficulties that remain to be overcome in this area. Source: www.britishbiogen.co.uk and WEA (2000). 5 All figures refer to electricity.Where necessary...

Neuhoff, Karsten

2006-03-14T23:59:59.000Z

117

Large-Scale Renewable Energy Development on Public Lands  

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

Large-Scale Renewable Energy Large-Scale Renewable Energy Development on Public Lands Boyan Kovacic boyan.kovacic@ee.doe.gov 5/2/12 2 | FEDERAL ENERGY MANAGEMENT PROGRAM femp.energy.gov * BLM RE Drivers * BLM RE Programs * BLM Permitting and Revenues * Case Studies * Withdrawn Military Land Outline 3 | FEDERAL ENERGY MANAGEMENT PROGRAM femp.energy.gov BLM: Bureau of Land Management BO: Biological Opinion CSP: Concentrating Solar Power DOE: Department of Energy DOI: Department of Interior EA: Environmental Assessment EIS: Environmental Impact Statement FONSI: Finding of No Significant Impact FS: U.S. Forrest Service IM: Instruction Memorandum MPDS: Maximum Potential Development Scenario NEPA: National Environmental Policy Act NOI: Notice of Intent NOP: Notice to Proceed

118

Large-Scale Renewable Energy Development on Public Lands  

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

Large-Scale Renewable Energy Large-Scale Renewable Energy Development on Public Lands Boyan Kovacic boyan.kovacic@ee.doe.gov 5/2/12 2 | FEDERAL ENERGY MANAGEMENT PROGRAM femp.energy.gov * BLM RE Drivers * BLM RE Programs * BLM Permitting and Revenues * Case Studies * Withdrawn Military Land Outline 3 | FEDERAL ENERGY MANAGEMENT PROGRAM femp.energy.gov BLM: Bureau of Land Management BO: Biological Opinion CSP: Concentrating Solar Power DOE: Department of Energy DOI: Department of Interior EA: Environmental Assessment EIS: Environmental Impact Statement FONSI: Finding of No Significant Impact FS: U.S. Forrest Service IM: Instruction Memorandum MPDS: Maximum Potential Development Scenario NEPA: National Environmental Policy Act NOI: Notice of Intent NOP: Notice to Proceed

119

Parallel I/O Software Infrastructure for Large-Scale Systems  

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

Parallel IO Software Infrastructure for Large-Scale Systems Parallel IO Software Infrastructure for Large-Scale Systems | Tags: Math & Computer Science Choudhary.png An...

120

MICRO-CHP System for Residential Applications  

SciTech Connect

This is the final report of progress under Phase I of a project to develop and commercialize a micro-CHP system for residential applications that provides electrical power, heating, and cooling for the home. This is the first phase of a three-phase effort in which the residential micro-CHP system will be designed (Phase I), developed and tested in the laboratory (Phase II); and further developed and field tested (Phase III). The project team consists of Advanced Mechanical Technology, Inc. (AMTI), responsible for system design and integration; Marathon Engine Systems, Inc. (MES), responsible for design of the engine-generator subsystem; AO Smith, responsible for design of the thermal storage and water heating subsystems; Trane, a business of American Standard Companies, responsible for design of the HVAC subsystem; and AirXchange, Inc., responsible for design of the mechanical ventilation and dehumidification subsystem.

Joseph Gerstmann

2009-01-31T23:59:59.000Z

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


121

Nuclear-pumped lasers for large-scale applications  

SciTech Connect

Efficient initiation of large-volume chemical lasers may be achieved by neutron induced reactions which produce charged particles in the final state. When a burst mode nuclear reactor is used as the neutron source, both a sufficiently intense neutron flux and a sufficiently short initiation pulse may be possible. Proof-of-principle experiments are planned to demonstrate lasing in a direct nuclear-pumped large-volume system; to study the effects of various neutron absorbing materials on laser performance; to study the effects of long initiation pulse lengths; to demonstrate the performance of large-scale optics and the beam quality that may be obtained; and to assess the performance of alternative designs of burst systems that increase the neutron output and burst repetition rate. 21 refs., 8 figs., 5 tabs.

Anderson, R.E.; Leonard, E.M.; Shea, R.F.; Berggren, R.R.

1989-05-01T23:59:59.000Z

122

The Role of Incentives in Promoting CHP Development  

E-Print Network (OSTI)

Conventional wisdom suggests that financial incentives should be sufficient to spur the installation of combined heat and power (CHP) systems. However, the states with the most CHP development are often not the states with the most generous financial incentives. ACEEE has collected data on state regulatory policies that suggest that states with a regulatory structure favorable to CHP have more implementation activity. The four regulatory factors that stick out are: 1) fair interconnection standards; 2) output-based emissions regulations; 3) fair utility standby rates; and 4) that CHP is encouraged within a clean or renewable energy standard. We anticipate that these four regulatory factors correlate more strongly with empirical CHP implementation than the presence of financial incentives for CHP, which suggests that getting regulatory and market conditions right may be more important than providing incentives. This finding could also apply to many other facets of energy efficiency policy.

Kaufman, N.; Elliot, R. N.

2010-01-01T23:59:59.000Z

123

Suggested Treatment of CHP Within an EERS Context  

E-Print Network (OSTI)

Reliable monitoring and measurement of the energy savings resulting from the installation of combined heat and power (CHP) systems and power recovered from waste energy (recycled energy) projects is becoming increasingly important. As a growing number of states and now the federal government look to mandatory energy efficiency portfolio programs such as an Energy Efficiency Resource Standard (EERS), CHP and waste heat recovery stands to play a substantial role as an efficiency resource. Estimating the energy savings resulting from the installation of a CHP system is critical to understanding and crediting the savings from CHP and recycled energy in a fair and uniform way. This paper proposes an approach to estimate CHP system savings, accounting for the wide variety of CHP systems available on the market today. It offers a specific methodology to meet state- and federal-level regulatory requirements emanating from an EERS. A full explanation of the proposed approach is provided.

Chittum, A.; Elliott, R. N.; Trombley, D.; Watson, S.

2009-05-01T23:59:59.000Z

124

Atypical Behavior Identification in Large Scale Network Traffic  

SciTech Connect

Cyber analysts are faced with the daunting challenge of identifying exploits and threats within potentially billions of daily records of network traffic. Enterprise-wide cyber traffic involves hundreds of millions of distinct IP addresses and results in data sets ranging from terabytes to petabytes of raw data. Creating behavioral models and identifying trends based on those models requires data intensive architectures and techniques that can scale as data volume increases. Analysts need scalable visualization methods that foster interactive exploration of data and enable identification of behavioral anomalies. Developers must carefully consider application design, storage, processing, and display to provide usability and interactivity with large-scale data. We present an application that highlights atypical behavior in enterprise network flow records. This is accomplished by utilizing data intensive architectures to store the data, aggregation techniques to optimize data access, statistical techniques to characterize behavior, and a visual analytic environment to render the behavioral trends, highlight atypical activity, and allow for exploration.

Best, Daniel M.; Hafen, Ryan P.; Olsen, Bryan K.; Pike, William A.

2011-10-23T23:59:59.000Z

125

Distributed Generation Study/Patterson Farms CHP System Using...  

Open Energy Info (EERE)

Farms CHP System Using Renewable Biogas < Distributed Generation Study Jump to: navigation, search Study Location Auburn, New York Site Description Agricultural Study Type Field...

126

Activation of 200 MW refusegenerated CHP upward regulation effect...  

Open Energy Info (EERE)

References EU Smart Grid Projects Map1 Overview Waste CHP plants can be used in the electricity market for upward regulation by bypassing the steam turbine. The technical...

127

Installation and Instrumentation of a Micro-CHP Demonstration Facility.  

E-Print Network (OSTI)

??Micro-Cooling, Heating and Power (CHP) is the decentralized generation of electricity in which normally wasted heat is recovered for use in heating and cooling of… (more)

Stone, Nicholas Alexander

2006-01-01T23:59:59.000Z

128

Theoretical and Experimental Analysis of micro-CHP Energy Systems.  

E-Print Network (OSTI)

??In the framework of the micro-CHP (Combined Heat and Power) energy systems and the Distributed Generation (GD) concept, an Integrated Energy System (IES) able to… (more)

Vecci, Roberta and#60;1978and#62

2013-01-01T23:59:59.000Z

129

WuKong: automatically detecting and localizing bugs that manifest at large system scales  

Science Conference Proceedings (OSTI)

A key challenge in developing large scale applications is finding bugs that are latent at the small scales of testing, but manifest themselves when the application is deployed at a large scale. Here, we ascribe a dual meaning to "large scale"---it could ... Keywords: feature reconstruction, program behavior prediction, scale-dependent bug

Bowen Zhou; Jonathan Too; Milind Kulkarni; Saurabh Bagchi

2013-06-01T23:59:59.000Z

130

Activation of 200 MW refusegenerated CHP upward regulation effect (Smart  

Open Energy Info (EERE)

effect (Smart effect (Smart Grid Project) (Thisted, Denmark) Jump to: navigation, search Project Name Activation of 200 MW refusegenerated CHP upward regulation effect Country Denmark Headquarters Location Thisted, Denmark Coordinates 56.959167°, 8.703492° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":56.959167,"lon":8.703492,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

131

Solar cycle variations of large scale flows in the Sun  

E-Print Network (OSTI)

Using data from the Michelson Doppler Imager (MDI) instrument on board the Solar and Heliospheric Observatory (SOHO), we study the large-scale velocity fields in the outer part of the solar convection zone using the ring diagram technique. We use observations from four different times to study possible temporal variations in flow velocity. We find definite changes in both the zonal and meridional components of the flows. The amplitude of the zonal flow appears to increase with solar activity and the flow pattern also shifts towards lower latitude with time.

Sarbani Basu; H. M. Antia

2000-01-17T23:59:59.000Z

132

Large-scale sodium spray fire code validation (SOFICOV) test  

Science Conference Proceedings (OSTI)

A large-scale, sodium, spray fire code validation test was performed in the HEDL 850-m/sup 3/ Containment System Test Facility (CSTF) as part of the Sodium Spray Fire Code Validation (SOFICOV) program. Six hundred fifty eight kilograms of sodium spray was sprayed in an air atmosphere for a period of 2400 s. The sodium spray droplet sizes and spray pattern distribution were estimated. The containment atmosphere temperature and pressure response, containment wall temperature response and sodium reaction rate with oxygen were measured. These results are compared to post-test predictions using SPRAY and NACOM computer codes.

Jeppson, D.W.; Muhlestein, L.D.

1985-01-01T23:59:59.000Z

133

Solving Large-scale Eigenvalue Problems in SciDACApplications  

SciTech Connect

Large-scale eigenvalue problems arise in a number of DOE applications. This paper provides an overview of the recent development of eigenvalue computation in the context of two SciDAC applications. We emphasize the importance of Krylov subspace methods, and point out its limitations. We discuss the value of alternative approaches that are more amenable to the use of preconditioners, and report the progression using the multi-level algebraic sub-structuring techniques to speed up eigenvalue calculation. In addition to methods for linear eigenvalue problems, we also examine new approaches to solving two types of non-linear eigenvalue problems arising from SciDAC applications.

Yang, Chao

2005-06-29T23:59:59.000Z

134

Large scale obscuration and related climate effects open literature bibliography  

SciTech Connect

Large scale obscuration and related climate effects of nuclear detonations first became a matter of concern in connection with the so-called ``Nuclear Winter Controversy`` in the early 1980`s. Since then, the world has changed. Nevertheless, concern remains about the atmospheric effects of nuclear detonations, but the source of concern has shifted. Now it focuses less on global, and more on regional effects and their resulting impacts on the performance of electro-optical and other defense-related systems. This bibliography reflects the modified interest.

Russell, N.A.; Geitgey, J.; Behl, Y.K.; Zak, B.D.

1994-05-01T23:59:59.000Z

135

Large-Scale Spray Releases: Additional Aerosol Test Results  

SciTech Connect

One of the events postulated in the hazard analysis for the Waste Treatment and Immobilization Plant (WTP) and other U.S. Department of Energy (DOE) nuclear facilities is a breach in process piping that produces aerosols with droplet sizes in the respirable range. The current approach for predicting the size and concentration of aerosols produced in a spray leak event involves extrapolating from correlations reported in the literature. These correlations are based on results obtained from small engineered spray nozzles using pure liquids that behave as a Newtonian fluid. The narrow ranges of physical properties on which the correlations are based do not cover the wide range of slurries and viscous materials that will be processed in the WTP and in processing facilities across the DOE complex. To expand the data set upon which the WTP accident and safety analyses were based, an aerosol spray leak testing program was conducted by Pacific Northwest National Laboratory (PNNL). PNNL’s test program addressed two key technical areas to improve the WTP methodology (Larson and Allen 2010). The first technical area was to quantify the role of slurry particles in small breaches where slurry particles may plug the hole and prevent high-pressure sprays. The results from an effort to address this first technical area can be found in Mahoney et al. (2012a). The second technical area was to determine aerosol droplet size distribution and total droplet volume from prototypic breaches and fluids, including sprays from larger breaches and sprays of slurries for which literature data are mostly absent. To address the second technical area, the testing program collected aerosol generation data at two scales, commonly referred to as small-scale and large-scale testing. The small-scale testing and resultant data are described in Mahoney et al. (2012b), and the large-scale testing and resultant data are presented in Schonewill et al. (2012). In tests at both scales, simulants were used to mimic the relevant physical properties projected for actual WTP process streams.

Daniel, Richard C.; Gauglitz, Phillip A.; Burns, Carolyn A.; Fountain, Matthew S.; Shimskey, Rick W.; Billing, Justin M.; Bontha, Jagannadha R.; Kurath, Dean E.; Jenks, Jeromy WJ; MacFarlan, Paul J.; Mahoney, Lenna A.

2013-08-01T23:59:59.000Z

136

Planning under uncertainty solving large-scale stochastic linear programs  

Science Conference Proceedings (OSTI)

For many practical problems, solutions obtained from deterministic models are unsatisfactory because they fail to hedge against certain contingencies that may occur in the future. Stochastic models address this shortcoming, but up to recently seemed to be intractable due to their size. Recent advances both in solution algorithms and in computer technology now allow us to solve important and general classes of practical stochastic problems. We show how large-scale stochastic linear programs can be efficiently solved by combining classical decomposition and Monte Carlo (importance) sampling techniques. We discuss the methodology for solving two-stage stochastic linear programs with recourse, present numerical results of large problems with numerous stochastic parameters, show how to efficiently implement the methodology on a parallel multi-computer and derive the theory for solving a general class of multi-stage problems with dependency of the stochastic parameters within a stage and between different stages.

Infanger, G. (Stanford Univ., CA (United States). Dept. of Operations Research Technische Univ., Vienna (Austria). Inst. fuer Energiewirtschaft)

1992-12-01T23:59:59.000Z

137

Large Scale Computing and Storage Requirements for Fusion Energy Sciences Research  

E-Print Network (OSTI)

strategic plans. Large  Scale  Computing  and  Storage  Requirements  for  Fusion  Energy  Sciences   DOE  

Gerber, Richard

2012-01-01T23:59:59.000Z

138

Exploring Cloud Computing for Large-scale Scientific Applications  

Science Conference Proceedings (OSTI)

This paper explores cloud computing for large-scale data-intensive scientific applications. Cloud computing is attractive because it provides hardware and software resources on-demand, which relieves the burden of acquiring and maintaining a huge amount of resources that may be used only once by a scientific application. However, unlike typical commercial applications that often just requires a moderate amount of ordinary resources, large-scale scientific applications often need to process enormous amount of data in the terabyte or even petabyte range and require special high performance hardware with low latency connections to complete computation in a reasonable amount of time. To address these challenges, we build an infrastructure that can dynamically select high performance computing hardware across institutions and dynamically adapt the computation to the selected resources to achieve high performance. We have also demonstrated the effectiveness of our infrastructure by building a system biology application and an uncertainty quantification application for carbon sequestration, which can efficiently utilize data and computation resources across several institutions.

Lin, Guang; Han, Binh; Yin, Jian; Gorton, Ian

2013-06-27T23:59:59.000Z

139

Parallel Index and Query for Large Scale Data Analysis  

SciTech Connect

Modern scientific datasets present numerous data management and analysis challenges. State-of-the-art index and query technologies are critical for facilitating interactive exploration of large datasets, but numerous challenges remain in terms of designing a system for process- ing general scientific datasets. The system needs to be able to run on distributed multi-core platforms, efficiently utilize underlying I/O infrastructure, and scale to massive datasets. We present FastQuery, a novel software framework that address these challenges. FastQuery utilizes a state-of-the-art index and query technology (FastBit) and is designed to process mas- sive datasets on modern supercomputing platforms. We apply FastQuery to processing of a massive 50TB dataset generated by a large scale accelerator modeling code. We demonstrate the scalability of the tool to 11,520 cores. Motivated by the scientific need to search for inter- esting particles in this dataset, we use our framework to reduce search time from hours to tens of seconds.

Chou, Jerry; Wu, Kesheng; Ruebel, Oliver; Howison, Mark; Qiang, Ji; Prabhat,; Austin, Brian; Bethel, E. Wes; Ryne, Rob D.; Shoshani, Arie

2011-07-18T23:59:59.000Z

140

Large Scale GSHP as Alternative Energy for American Farmers Geothermal  

Open Energy Info (EERE)

GSHP as Alternative Energy for American Farmers Geothermal GSHP as Alternative Energy for American Farmers Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title Large Scale GSHP as Alternative Energy for American Farmers Project Type / Topic 1 Recovery Act - Geothermal Technologies Program: Ground Source Heat Pumps Project Type / Topic 2 Topic Area 1: Technology Demonstration Projects Project Description We propose a large scale demonstration of solar assisted GSHP systems on two poultry farms in mid-Missouri. The heating load of Farm A with 4 barns will be 510 tons and Farm B with 5 barns will be 440 tons. Solar assisted GSHP systems will be installed, and new utility business model will be applied to both farms. Farm A will be constructed with commercial products in order to bring immediate impact to the industry. Farm B will also have a thermal energy storage system installed, and improved solar collectors will be used. A comprehensive energy analysis and economic study will be conducted.

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141

Biomass DHP/ CHP benefits at local and regional level  

E-Print Network (OSTI)

Biomass DHP/ CHP ­ benefits at local and regional level Krzysztof Gierulski EC Baltic RenewableEnergy Workshop, Brussels 01.07.2002 http://www.managenergy.net/conference/ren0702/gierulski.pdf #12;Biomass DHP of conversion to biomass CHP at larger sites in PL", OPET) n Technical assistance (,,Feasibility

142

Exploiting multi-scale parallelism for large scale numerical modelling of laser wakefield accelerators  

E-Print Network (OSTI)

A new generation of laser wakefield accelerators, supported by the extreme accelerating fields generated in the interaction of PW-Class lasers and underdense targets, promises the production of high quality electron beams in short distances for multiple applications. Achieving this goal will rely heavily on numerical modeling for further understanding of the underlying physics and identification of optimal regimes, but large scale modeling of these scenarios is computationally heavy and requires efficient use of state-of-the-art Petascale supercomputing systems. We discuss the main difficulties involved in running these simulations and the new developments implemented in the OSIRIS framework to address these issues, ranging from multi-dimensional dynamic load balancing and hybrid distributed / shared memory parallelism to the vectorization of the PIC algorithm. We present the results of the OASCR Joule Metric program on the issue of large scale modeling of LWFA, demonstrating speedups of over 1 order of magni...

Fonseca, Ricardo A; Fiúza, Frederico; Davidson, Asher; Tsung, Frank S; Mori, Warren B; Silva, Luís O

2013-01-01T23:59:59.000Z

143

Large Scale Geothermal Exchange System for Residential, Office and Retail  

Open Energy Info (EERE)

Geothermal Exchange System for Residential, Office and Retail Geothermal Exchange System for Residential, Office and Retail Development Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title Large Scale Geothermal Exchange System for Residential, Office and Retail Development Project Type / Topic 1 Recovery Act - Geothermal Technologies Program: Ground Source Heat Pumps Project Type / Topic 2 Topic Area 1: Technology Demonstration Projects Project Description RiverHeath will be a new neighborhood, with residences, shops, restaurants, and offices. The design incorporates walking trails, community gardens, green roofs, and innovative stormwater controls. A major component of the project is our reliance on renewable energy. One legacy of the land's industrial past is an onsite hydro-electric facility which formerly powered the paper factories. The onsite hydro is being refurbished and will furnish 100% of the project's electricity demand.

144

Breakthrough Large-Scale Industrial Project Begins Carbon Capture and  

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

28, 2013 28, 2013 Breakthrough Large-Scale Industrial Project Begins Carbon Capture and Utilization DOE-Supported Project in Texas Demonstrates Viability of CCUS Technology Washington, D.C. - A breakthrough carbon capture, utilization, and storage (CCUS) project in Texas has begun capturing carbon dioxide (CO2) and piping it to an oilfield for use in enhanced oil recovery (EOR). MORE INFO Read the project factsheet The project at Air Products and Chemicals hydrogen production facility in Port Arthur, Texas, is significant for demonstrating both the effectiveness and commercial viability of CCUS technology as an option in helping mitigate atmospheric CO2 emissions. Funded in part through the American Recovery and Reinvestment Act (ARRA), the project is managed by the U.S.

145

Large-Scale Analyses of Glycosylation in Cellulases  

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

Article Article Large-Scale Analyses of Glycosylation in Cellulases Fengfeng Zhou 1,2 , Victor Olman 1,2 , and Ying Xu 1,2 * 1 Computational Systems Biology Laboratory, Department of Biochemistry and Molecular Biology / Institute of Bioinformatics, University of Georgia, Athens, GA 30602-7229, USA; 2 BioEnergy Science Center, Oak Ridge National Laboratory, Oak Ridge, TN 37830-8050, USA. *Corresponding author. E-mail: xyn@bmb.uga.edu DOI: 10.1016/S1672-0229(08)60049-2 Cellulases are important glycosyl hydrolases (GHs) that hydrolyze cellulose poly- mers into smaller oligosaccharides by breaking the cellulose β (1→4) bonds, and they are widely used to produce cellulosic ethanol from the plant biomass. N-linked and O-linked glycosylations were proposed to impact the catalytic ef f iciency, cel- lulose binding af f inity and the stability of cellulases based on observations

146

Cosmological Simulations for Large-Scale Sky Surveys | Argonne Leadership  

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

Instantaneous velocity magnitude in a flow through an open valve in a valve/piston assembly. Instantaneous velocity magnitude in a flow through an open valve in a valve/piston assembly. Instantaneous velocity magnitude in a flow through an open valve in a valve/piston assembly. Christos Altantzis, MIT, and Martin Schmitt, LAV. All the images were generated from their work at LAV. Cosmological Simulations for Large-Scale Sky Surveys PI Name: Christos Frouzakis PI Email: frouzakis@lav.mavt.ethz.ch Institution: Swiss Federal Institute of Technology Zurich Allocation Program: INCITE Allocation Hours at ALCF: 100 Million Year: 2014 Research Domain: Chemistry The combustion of coal and petroleum-based fuels supply most of the energy needed to meet the world's transportation and power generation demands. To address the anticipated petroleum shortage, along with increasing energy

147

A New Scalable Directory Architecture for Large-Scale Multiprocessors  

E-Print Network (OSTI)

The memory overhead introduced by directories constitutes a major hurdle in the scalability of cc-NUMA architectures, which makes the shared-memory paradigm unfeasible for very large-scale systems. This work is focused on improving the scalability of shared-memory multiprocessors by significantly reducing the size of the directory. We propose multilayer clustering as an effective approach to reduce the directory-entry width. Detailed evaluation for 64 processors shows that using this approach we can drastically reduce the memory overhead, while suffering a performance degradation very similar to previous compressed schemes (such as Coarse Vector). In addition, a novel two-level directory architecture is proposed in order to eliminate the penalty caused by these compressed directories. This organization consists of a small Full-Map firstlevel directory (which provides precise information for the most recently referenced lines) and a compressed secondlevel directory (which provides in-ex...

Manuel E. Acacio; José González; José M. García; José Duato

2001-01-01T23:59:59.000Z

148

CONSTRAINING PRIMORDIAL MAGNETIC FIELDS THROUGH LARGE-SCALE STRUCTURE  

Science Conference Proceedings (OSTI)

We study primordial magnetic field effects on the matter perturbations in the universe. We assume magnetic field generation prior to the big bang nucleosynthesis (BBN), i.e., during the radiation-dominated epoch of the universe expansion, but do not limit analysis by considering a particular magnetogenesis scenario. Contrary to previous studies, we limit the total magnetic field energy density and not the smoothed amplitude of the magnetic field at large (of the order of 1 Mpc) scales. We review several cosmological signatures, such as halo abundance, thermal Sunyaev-Zel'dovich effect, and Ly{alpha} data. For a cross-check, we compare our limits with that obtained through the cosmic microwave background faraday rotation effect and BBN. The limits range between 1.5 nG and 4.5 nG for n{sub B} in (- 3; -1.5).

Kahniashvili, Tina; Natarajan, Aravind; Battaglia, Nicholas [McWilliams Center for Cosmology and Department of Physics, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA 15213 (United States); Maravin, Yurii [Department of Physics, Kansas State University, 116 Cardwell Hall, Manhattan, KS 66506 (United States); Tevzadze, Alexander G., E-mail: tinatin@andrew.cmu.edu [Faculty of Exact and Natural Sciences, Javakhishvili Tbilisi State University, 3 Chavchavadze Avenue, Tbilisi 0128 (Georgia)

2013-06-10T23:59:59.000Z

149

Lightweight computational steering of very large scale molecular dynamics simulations  

Science Conference Proceedings (OSTI)

We present a computational steering approach for controlling, analyzing, and visualizing very large scale molecular dynamics simulations involving tens to hundreds of millions of atoms. Our approach relies on extensible scripting languages and an easy to use tool for building extensions and modules. The system is extremely easy to modify, works with existing C code, is memory efficient, and can be used from inexpensive workstations and networks. We demonstrate how we have used this system to manipulate data from production MD simulations involving as many as 104 million atoms running on the CM-5 and Cray T3D. We also show how this approach can be used to build systems that integrate common scripting languages (including Tcl/Tk, Perl, and Python), simulation code, user extensions, and commercial data analysis packages.

Beazley, D.M. [Univ. of Utah, Salt Lake City, UT (United States). Dept. of Computer Science; Lomdahl, P.S. [Los Alamos National Lab., NM (United States)

1996-09-01T23:59:59.000Z

150

Grid infrastructure to support science portals for large scale instruments.  

SciTech Connect

Soon, a new generation of scientific workbenches will be developed as a collaborative effort among various research institutions in the US. These scientific workbenches will be accessed in the Web via portals. Reusable components are needed to build such portals for different scientific disciplines, allowing uniform desktop access to remote resources. Such components will include tools and services enabling easy collaboration, job submission, job monitoring, component discovery, and persistent object storage. Based on experience gained from Grand Challenge applications for large-scale instruments, we demonstrate how Grid infrastructure components can be used to support the implementation of science portals. The availability of these components will simplify the prototype implementation of a common portal architecture.

von Laszewski, G.; Foster, I.

1999-09-29T23:59:59.000Z

151

Unified architecture for large-scale attested metering  

E-Print Network (OSTI)

We introduce a secure architecture called an attested meter for advanced metering that supports large-scale deployments, flexible configurations, and enhanced protection for consumer privacy and metering integrity. Our study starts with a threat analysis for advanced metering networks and formulates protection requirements for those threats. The attested meter satisfies these through a unified set of system interfaces based on virtual machines and attestation for the software agents of various parties that use the meter. We argue that this combination provides a well-adapted architecture for advanced metering and we take a step towards demonstrating its feasibility with a prototype implementation based on the Trusted Platform Module (TPM) and Xen Virtual Machine Monitor (VMM). This is the first effort use virtual machines and attestation in an advanced meter. 1.

Michael Lemay; George Gross; Carl A. Gunter; Sanjam Garg

2007-01-01T23:59:59.000Z

152

Modeling The Large Scale Bias of Neutral Hydrogen  

E-Print Network (OSTI)

We present analytical estimates of the large scale bias of neutral Hydrogen (HI) based on the Halo Occupation Distribution formalism. We use a simple, non-parametric model which monotonically relates the total mass of a halo with its HI mass at zero redshift; for earlier times we assume limiting models for the HI density parameter evolution, consistent with the data presently available, as well as two main scenarios for the evolution of our HI mass - Halo mass relation. We find that both the linear and the first non-linear bias terms exhibit a remarkable evolution with redshift, regardless of the specific limiting model assumed for the HI evolution. These analytical predictions are then shown to be consistent with measurements performed on the Millennium Simulation. Additionally, we show that this strong bias evolution does not sensibly affect the measurement of the HI Power Spectrum.

Marin, Felipe; Seo, Hee-Jong; Vallinotto, Alberto

2009-01-01T23:59:59.000Z

153

Hydrogen-combustion analyses of large-scale tests  

DOE Green Energy (OSTI)

This report uses results of the large-scale tests with turbulence performed by the Electric Power Research Institute at the Nevada Test Site to evaluate hydrogen burn-analysis procedures based on lumped-parameter codes like COMPARE-H2 and associated burn-parameter models. The test results: (1) confirmed, in a general way, the procedures for application to pulsed burning, (2) increased significantly our understanding of the burn phenomenon by demonstrating that continuous burning can occur, and (3) indicated that steam can terminate continuous burning. Future actions recommended include: (1) modification of the code to perform continuous-burn analyses, which is demonstrated, (2) analyses to determine the type of burning (pulsed or continuous) that will exist in nuclear containments and the stable location if the burning is continuous, and (3) changes to the models for estimating burn parameters.

Gido, R.G.; Koestel, A.

1986-01-01T23:59:59.000Z

154

Advanced coal gasifier designs using large-scale simulations  

Science Conference Proceedings (OSTI)

Porting of the legacy code MFIX to a high performance computer (HPC) and the use of high resolution simulations for the design of a coal gasifier are described here. MFIX is based on a continuum multiphase flow model that considers gas and solids to form interpenetrating continua. Low resolution simulations of a commercial scale gasifier with a validated MFIX model revealed interesting physical phenomena with implications on the gasifier design, which prompted the study reported here. To be predictive, the simulations need to model the spatiotemporal variations in gas and solids volume fractions, velocities, temperatures with any associated phase change and chemical reactions. These processes occur at various time- and length-scales requiring very high spatial resolution and large number of iterations with small time-steps. We were able to perform perhaps the largest known simulations of gas-solids reacting flows, providing detailed information about the gas-solids flow structure and the pressure, temperature and species distribution in the gasifier. One key finding is the new features of the coal jet trajectory revealed with the high spatial resolution, which provides information on the accuracy of the lower resolution simulations. Methodologies for effectively combining high and low resolution simulations for design studies must be developed. From a computational science perspective, we found that global communication has to be reduced to achieve scalability to 1000s of cores, hybrid parallelization is required to effectively utilize the multicore chips, and the wait time in the batch queue significantly increases the actual time-to-solution. From our experience, development is required in the following areas: efficient solvers for heterogeneous, massively parallel systems; data analysis tools to extract information from large data sets; and programming environments for easily porting legacy codes to HPC.

Syamlal, M [National Energy Technology Laboratory (NETL); Guenther, Chris [National Energy Technology Laboratory (NETL); Gel, Aytekin [Aeolus Research Inc.; Pannala, Sreekanth [ORNL

2009-01-01T23:59:59.000Z

155

Training a Large Scale Classifier with the Quantum Adiabatic Algorithm  

E-Print Network (OSTI)

In a previous publication we proposed discrete global optimization as a method to train a strong binary classifier constructed as a thresholded sum over weak classifiers. Our motivation was to cast the training of a classifier into a format amenable to solution by the quantum adiabatic algorithm. Applying adiabatic quantum computing (AQC) promises to yield solutions that are superior to those which can be achieved with classical heuristic solvers. Interestingly we found that by using heuristic solvers to obtain approximate solutions we could already gain an advantage over the standard method AdaBoost. In this communication we generalize the baseline method to large scale classifier training. By large scale we mean that either the cardinality of the dictionary of candidate weak classifiers or the number of weak learners used in the strong classifier exceed the number of variables that can be handled effectively in a single global optimization. For such situations we propose an iterative and piecewise approach in which a subset of weak classifiers is selected in each iteration via global optimization. The strong classifier is then constructed by concatenating the subsets of weak classifiers. We show in numerical studies that the generalized method again successfully competes with AdaBoost. We also provide theoretical arguments as to why the proposed optimization method, which does not only minimize the empirical loss but also adds L0-norm regularization, is superior to versions of boosting that only minimize the empirical loss. By conducting a Quantum Monte Carlo simulation we gather evidence that the quantum adiabatic algorithm is able to handle a generic training problem efficiently.

Hartmut Neven; Vasil S. Denchev; Geordie Rose; William G. Macready

2009-12-04T23:59:59.000Z

156

A LARGE-SCALE SHOCK SURROUNDING A POWERFUL RADIO GALAXY?  

Science Conference Proceedings (OSTI)

We report Chandra evidence for a 200 kpc scale shock in the cluster surrounding the powerful radio galaxy 3C 444. Our 20 ks observation allows us to identify a clear surface brightness drop around the outer edge of the radio galaxy, which is likely to correspond to a spheroidal shock propagating into the intracluster medium. We measure a temperature jump across this drop of a factor {approx}1.7, which corresponds to a Mach number of {approx}1.7. This is likely to be an underestimate due to the need to average over fairly large regions. We also detect clear cavities corresponding to the positions of the radio lobes, which is only the second such detection associated with an FRII radio galaxy. We estimate that the total energy transferred to the environment is >8.2 x 10{sup 60} erg, corresponding to a jet power >2.9 x 10{sup 45} erg s{sup -1}. Our results suggest that energy input from FRII radio galaxies is likely to exceed substantially estimates based on cluster cavity scaling relations.

Croston, J. H. [School of Physics and Astronomy, University of Southampton, Southampton, SO17 1BJ (United Kingdom); Hardcastle, M. J.; Mingo, B. [School of Physics, Astronomy and Mathematics, University of Hertfordshire, Hatfield, Hertfordshire, AL10 9AB (United Kingdom); Evans, D. A. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Dicken, D. [Department of Physics and Astronomy, Rochester Institute of Technology, 84 Lomb Memorial Drive, Rochester, NY 14623 (United States); Morganti, R. [Netherlands Institute for Radio Astronomy, Postbus 2, 7990 AA, Dwingeloo (Netherlands); Tadhunter, C. N., E-mail: J.Croston@soton.ac.uk [Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH (United Kingdom)

2011-06-20T23:59:59.000Z

157

Large-Angular-Scale Anisotropy in the Cosmic Background Radiation  

DOE R&D Accomplishments (OSTI)

We report the results of an extended series of airborne measurements of large-angular-scale anisotropy in the 3 K cosmic background radiation. Observations were carried out with a dual-antenna microwave radiometer operating at 33 GHz (.089 cm wavelength) flown on board a U-2 aircraft to 20 km altitude. In eleven flights, between December 1976 and May 1978, the radiometer measured differential intensity between pairs of directions distributed over most of the northern hemisphere with an rms sensitivity of 47 mK Hz{sup 1?}. The measurements how clear evidence of anisotropy that is readily interpreted as due to the solar motion relative to the sources of the radiation. The anisotropy is well fit by a first order spherical harmonic of amplitude 360{+ or -}50km sec{sup -1} toward the direction 11.2{+ or -}0.5 hours of right ascension and 19 {+ or -}8 degrees declination. A simultaneous fit to a combined hypotheses of dipole and quadrupole angular distributions places a 1 mK limit on the amplitude of most components of quadrupole anisotropy with 90% confidence. Additional analysis places a 0.5 mK limit on uncorrelated fluctuations (sky-roughness) in the 3 K background on an angular scale of the antenna beam width, about 7 degrees.

Gorenstein, M. V.; Smoot, G. F.

1980-05-00T23:59:59.000Z

158

Ferroelectric opening switches for large-scale pulsed power drivers.  

DOE Green Energy (OSTI)

Fast electrical energy storage or Voltage-Driven Technology (VDT) has dominated fast, high-voltage pulsed power systems for the past six decades. Fast magnetic energy storage or Current-Driven Technology (CDT) is characterized by 10,000 X higher energy density than VDT and has a great number of other substantial advantages, but it has all but been neglected for all of these decades. The uniform explanation for neglect of CDT technology is invariably that the industry has never been able to make an effective opening switch, which is essential for the use of CDT. Most approaches to opening switches have involved plasma of one sort or another. On a large scale, gaseous plasmas have been used as a conductor to bridge the switch electrodes that provides an opening function when the current wave front propagates through to the output end of the plasma and fully magnetizes the plasma - this is called a Plasma Opening Switch (POS). Opening can be triggered in a POS using a magnetic field to push the plasma out of the A-K gap - this is called a Magnetically Controlled Plasma Opening Switch (MCPOS). On a small scale, depletion of electron plasmas in semiconductor devices is used to affect opening switch behavior, but these devices are relatively low voltage and low current compared to the hundreds of kilo-volts and tens of kilo-amperes of interest to pulsed power. This work is an investigation into an entirely new approach to opening switch technology that utilizes new materials in new ways. The new materials are Ferroelectrics and using them as an opening switch is a stark contrast to their traditional applications in optics and transducer applications. Emphasis is on use of high performance ferroelectrics with the objective of developing an opening switch that would be suitable for large scale pulsed power applications. Over the course of exploring this new ground, we have discovered new behaviors and properties of these materials that were here to fore unknown. Some of these unexpected discoveries have lead to new research directions to address challenges.

Brennecka, Geoffrey L.; Rudys, Joseph Matthew; Reed, Kim Warren; Pena, Gary Edward; Tuttle, Bruce Andrew; Glover, Steven Frank

2009-11-01T23:59:59.000Z

159

Safety aspects of large-scale combustion of hydrogen  

DOE Green Energy (OSTI)

Recent hydrogen-safety investigations have studied the possible large-scale effects from phenomena such as the accumulation of combustible hydrogen-air mixtures in large, confined volumes. Of particular interest are safe methods for the disposal of the hydrogen and the pressures which can arise from its confined combustion. Consequently, tests of the confined combustion of hydrogen-air mixtures were conducted in a 2100 m/sup 3/ volume. These tests show that continuous combustion, as the hydrogen is generated, is a safe method for its disposal. It also has been seen that, for hydrogen concentrations up to 13 vol %, it is possible to predict maximum pressures that can occur upon ignition of premixed hydrogen-air atmospheres. In addition information has been obtained concerning the survivability of the equipment that is needed to recover from an accident involving hydrogen combustion. An accident that involved the inadvertent mixing of hydrogen and oxygen gases in a tube trailer gave evidence that under the proper conditions hydrogen combustion can transit to a detonation. If detonation occurs the pressures which can be experienced are much higher although short in duration.

Edeskuty, F.J.; Haugh, J.J.; Thompson, R.T.

1986-01-01T23:59:59.000Z

160

Planning and implementing a large-scale polymer flood  

Science Conference Proceedings (OSTI)

The motive for the Eliasville polymerflood originated while planning a waterflood in this light oil, limestone reservoir. Adverse reservoir waterflood characteristics were identified prior to unitization and laboratory work was undertaken to demonstrate the benefits of reducing water mobility by increasing water vicosity with several different polyacrylamides. Computer simulations incorporating polymer properties from laboratory work and known Caddo waterflood performance were used to design the polymerflood. Three injection tests were conducted to determine polymer injectivity. Pressure transient tests were used to measure the in-situ polymer viscosity. One of the injection tests included an off-pattern producing well which permitted an estimation of polymer retention and incremental oil recovery in a short time. Based on the injection tests and simulation work a large scale polymer project was implemented. The optimum slug size required 30,000,000 lb of emulsion polymer. Facilities used to mix and feed this large amount of polymer are described. A low-shear polymer flow control method was developed to insure maximum fluid viscosity at the formation perforations. Product specifications were verified prior to accepting delivery and injection fluid quality was monitored in laboratories constructed for the project. Early production response to field wide polymer injection is comparable to that observed at the off-pattern producing well during the injection test. While the early field response is encouraging, the effects of salt water injection on slug integrity and increased pattern size on oil recovery are still to be determined.

Weiss, W.W.; Baldwin, R.W.

1984-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "large scale chp" 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

Research, Development and Demonstration of Micro-CHP System for Residential Applications  

Science Conference Proceedings (OSTI)

ECR International and its joint venture company, Climate Energy, are at the forefront of the effort to deliver residential-scale combined heat and power (Micro-CHP) products to the USA market. Part of this substantial program is focused on the development of a new class of steam expanders that offers the potential for significantly lower costs for small-scale power generation technology. The heart of this technology is the scroll expander, a machine that has revolutionized the HVAC refrigerant compressor industry in the last 15 years. The liquid injected cogeneration (LIC) technology is at the core of the efforts described in this report, and remains an excellent option for low cost Micro-CHP systems. ECR has demonstrated in several prototype appliances that the concept for LIC can be made into a practical product. The continuing challenge is to identify economical scroll machine designs that will meet the performance and endurance requirements needed for a long life appliance application. This report describes the numerous advances made in this endeavor by ECR International. Several important advances are described in this report. Section 4 describes a marketing and economics study that integrates the technical performance of the LIC system with real-world climatic data and economic analysis to assess the practical impact that different factors have on the economic application of Micro-CHP in residential applications. Advances in the development of a working scroll steam expander are discussed in Section 5. A rigorous analytical assessment of the performance of scroll expanders, including the difficult to characterize impact of pocket to pocket flank leakage, is presented in Section 5.1. This is followed with an FEA study of the thermal and pressure induced deflections that would result from the normal operation of an advanced scroll expander. Section 6 describes the different scroll expanders and test fixtures developed during this effort. Another key technical challenge to the development of a long life LIC system is the development of a reliable and efficient steam generator. The steam generator and support equipment development is described in Section 7. Just one year ago, ECR International announced through its joint venture company, Climate Energy, that it was introducing to the USA market a new class of Micro-CHP product using the state-of-the-art Honda MCHP gas fired internal combustion (IC) engine platform. We now have installed Climate Energy Micro-CHP systems in 20 pilot demonstration sites for the 2005/2006 heating season. This breakthrough success with IC engine based systems paves the way for future advanced steam cycle Micro-CHP systems to be introduced.

Karl Mayer

2010-03-31T23:59:59.000Z

162

Large-Scale Data Challenges in Future Power Grids  

Science Conference Proceedings (OSTI)

This paper describes technical challenges in supporting large-scale real-time data analysis for future power grid systems and discusses various design options to address these challenges. Even though the existing U.S. power grid has served the nation remarkably well over the last 120 years, big changes are in the horizon. The widespread deployment of renewable generation, smart grid controls, energy storage, plug-in hybrids, and new conducting materials will require fundamental changes in the operational concepts and principal components. The whole system becomes highly dynamic and needs constant adjustments based on real time data. Even though millions of sensors such as phase measurement units (PMUs) and smart meters are being widely deployed, a data layer that can support this amount of data in real time is needed. Unlike the data fabric in cloud services, the data layer for smart grids must address some unique challenges. This layer must be scalable to support millions of sensors and a large number of diverse applications and still provide real time guarantees. Moreover, the system needs to be highly reliable and highly secure because the power grid is a critical piece of infrastructure. No existing systems can satisfy all the requirements at the same time. We examine various design options. In particular, we explore the special characteristics of power grid data to meet both scalability and quality of service requirements. Our initial prototype can improve performance by orders of magnitude over existing general-purpose systems. The prototype was demonstrated with several use cases from PNNL’s FPGI and was shown to be able to integrate huge amount of data from a large number of sensors and a diverse set of applications.

Yin, Jian; Sharma, Poorva; Gorton, Ian; Akyol, Bora A.

2013-03-25T23:59:59.000Z

163

CHP Integrated with Burners for Packaged Boilers  

SciTech Connect

The objective of this project was to engineer, design, fabricate, and field demonstrate a Boiler Burner Energy System Technology (BBEST) that integrates a low-cost, clean burning, gas-fired simple-cycle (unrecuperated) 100 kWe (net) microturbine (SCMT) with a new ultra low-NOx gas-fired burner (ULNB) into one compact Combined Heat and Power (CHP) product that can be retrofit on new and existing industrial and commercial boilers in place of conventional burners. The Scope of Work for this project was segmented into two principal phases: (Phase I) Hardware development, assembly and pre-test and (Phase II) Field installation and demonstration testing. Phase I was divided into five technical tasks (Task 2 to 6). These tasks covered the engineering, design, fabrication, testing and optimization of each key component of the CHP system principally, ULNB, SCMT, assembly BBEST CHP package, and integrated controls. Phase I work culminated with the laboratory testing of the completed BBEST assembly prior to shipment for field installation and demonstration. Phase II consisted of two remaining technical tasks (Task 7 and 8), which focused on the installation, startup, and field verification tests at a pre-selected industrial plant to document performance and attainment of all project objectives. Technical direction and administration was under the management of CMCE, Inc. Altex Technologies Corporation lead the design, assembly and testing of the system. Field demonstration was supported by Leva Energy, the commercialization firm founded by executives at CMCE and Altex. Leva Energy has applied for patent protection on the BBEST process under the trade name of Power Burner and holds the license for the burner currently used in the product. The commercial term Power Burner is used throughout this report to refer to the BBEST technology proposed for this project. The project was co-funded by the California Energy Commission and the Southern California Gas Company (SCG), a division of Sempra Energy. These match funds were provided via concurrent contracts and investments available via CMCE, Altex, and Leva Energy The project attained all its objectives and is considered a success. CMCE secured the support of GI&E from Italy to supply 100 kW Turbec T-100 microturbines for the project. One was purchased by the project’s subcontractor, Altex, and a second spare was purchased by CMCE under this project. The microturbines were then modified to convert from their original recuperated design to a simple cycle configuration. Replacement low-NOx silo combustors were designed and bench tested in order to achieve compliance with the California Air Resources Board (CARB) 2007 emission limits for NOx and CO when in CHP operation. The converted microturbine was then mated with a low NOx burner provided by Altex via an integration section that allowed flow control and heat recovery to minimize combustion blower requirements; manage burner turndown; and recover waste heat. A new fully integrated control system was designed and developed that allowed one-touch system operation in all three available modes of operation: (1) CHP with both microturbine and burner firing for boiler heat input greater than 2 MMBtu/hr; (2) burner head only (BHO) when the microturbine is under service; and (3) microturbine only when boiler heat input requirements fall below 2 MMBtu/hr. This capability resulted in a burner turndown performance of nearly 10/1, a key advantage for this technology over conventional low NOx burners. Key components were then assembled into a cabinet with additional support systems for generator cooling and fuel supply. System checkout and performance tests were performed in the laboratory. The assembled system and its support equipment were then shipped and installed at a host facility where final performance tests were conducted following efforts to secure fabrication, air, and operating permits. The installed power burner is now in commercial operation and has achieved all the performance goals.

Castaldini, Carlo; Darby, Eric

2013-09-30T23:59:59.000Z

164

PROPERTIES IMPORTANT TO MIXING FOR WTP LARGE SCALE INTEGRATED TESTING  

Science Conference Proceedings (OSTI)

Large Scale Integrated Testing (LSIT) is being planned by Bechtel National, Inc. to address uncertainties in the full scale mixing performance of the Hanford Waste Treatment and Immobilization Plant (WTP). Testing will use simulated waste rather than actual Hanford waste. Therefore, the use of suitable simulants is critical to achieving the goals of the test program. External review boards have raised questions regarding the overall representativeness of simulants used in previous mixing tests. Accordingly, WTP requested the Savannah River National Laboratory (SRNL) to assist with development of simulants for use in LSIT. Among the first tasks assigned to SRNL was to develop a list of waste properties that matter to pulse-jet mixer (PJM) mixing of WTP tanks. This report satisfies Commitment 5.2.3.1 of the Department of Energy Implementation Plan for Defense Nuclear Facilities Safety Board Recommendation 2010-2: physical properties important to mixing and scaling. In support of waste simulant development, the following two objectives are the focus of this report: (1) Assess physical and chemical properties important to the testing and development of mixing scaling relationships; (2) Identify the governing properties and associated ranges for LSIT to achieve the Newtonian and non-Newtonian test objectives. This includes the properties to support testing of sampling and heel management systems. The test objectives for LSIT relate to transfer and pump out of solid particles, prototypic integrated operations, sparger operation, PJM controllability, vessel level/density measurement accuracy, sampling, heel management, PJM restart, design and safety margin, Computational Fluid Dynamics (CFD) Verification and Validation (V and V) and comparison, performance testing and scaling, and high temperature operation. The slurry properties that are most important to Performance Testing and Scaling depend on the test objective and rheological classification of the slurry (i.e., Newtonian or non-Newtonian). The most important properties for testing with Newtonian slurries are the Archimedes number distribution and the particle concentration. For some test objectives, the shear strength is important. In the testing to collect data for CFD V and V and CFD comparison, the liquid density and liquid viscosity are important. In the high temperature testing, the liquid density and liquid viscosity are important. The Archimedes number distribution combines effects of particle size distribution, solid-liquid density difference, and kinematic viscosity. The most important properties for testing with non-Newtonian slurries are the slurry yield stress, the slurry consistency, and the shear strength. The solid-liquid density difference and the particle size are also important. It is also important to match multiple properties within the same simulant to achieve behavior representative of the waste. Other properties such as particle shape, concentration, surface charge, and size distribution breadth, as well as slurry cohesiveness and adhesiveness, liquid pH and ionic strength also influence the simulant properties either directly or through other physical properties such as yield stress.

Koopman, D.; Martino, C.; Poirier, M.

2012-04-26T23:59:59.000Z

165

Large-Scale Spray Releases: Initial Aerosol Test Results  

Science Conference Proceedings (OSTI)

One of the events postulated in the hazard analysis at the Waste Treatment and Immobilization Plant (WTP) and other U.S. Department of Energy (DOE) nuclear facilities is a breach in process piping that produces aerosols with droplet sizes in the respirable range. The current approach for predicting the size and concentration of aerosols produced in a spray leak involves extrapolating from correlations reported in the literature. These correlations are based on results obtained from small engineered spray nozzles using pure liquids with Newtonian fluid behavior. The narrow ranges of physical properties on which the correlations are based do not cover the wide range of slurries and viscous materials that will be processed in the WTP and across processing facilities in the DOE complex. Two key technical areas were identified where testing results were needed to improve the technical basis by reducing the uncertainty due to extrapolating existing literature results. The first technical need was to quantify the role of slurry particles in small breaches where the slurry particles may plug and result in substantially reduced, or even negligible, respirable fraction formed by high-pressure sprays. The second technical need was to determine the aerosol droplet size distribution and volume from prototypic breaches and fluids, specifically including sprays from larger breaches with slurries where data from the literature are scarce. To address these technical areas, small- and large-scale test stands were constructed and operated with simulants to determine aerosol release fractions and generation rates from a range of breach sizes and geometries. The properties of the simulants represented the range of properties expected in the WTP process streams and included water, sodium salt solutions, slurries containing boehmite or gibbsite, and a hazardous chemical simulant. The effect of anti-foam agents was assessed with most of the simulants. Orifices included round holes and rectangular slots. The round holes ranged in size from 0.2 to 4.46 mm. The slots ranged from (width × length) 0.3 × 5 to 2.74 × 76.2 mm. Most slots were oriented longitudinally along the pipe, but some were oriented circumferentially. In addition, a limited number of multi-hole test pieces were tested in an attempt to assess the impact of a more complex breach. Much of the testing was conducted at pressures of 200 and 380 psi, but some tests were conducted at 100 psi. Testing the largest postulated breaches was deemed impractical because of the large size of some of the WTP equipment. The purpose of this report is to present the experimental results and analyses for the aerosol measurements obtained in the large-scale test stand. The report includes a description of the simulants used and their properties, equipment and operations, data analysis methodology, and test results. The results of tests investigating the role of slurry particles in plugging of small breaches are reported in Mahoney et al. 2012a. The results of the aerosol measurements in the small-scale test stand are reported in Mahoney et al. (2012b).

Schonewill, Philip P.; Gauglitz, Phillip A.; Bontha, Jagannadha R.; Daniel, Richard C.; Kurath, Dean E.; Adkins, Harold E.; Billing, Justin M.; Burns, Carolyn A.; Davis, James M.; Enderlin, Carl W.; Fischer, Christopher M.; Jenks, Jeromy WJ; Lukins, Craig D.; MacFarlan, Paul J.; Shutthanandan, Janani I.; Smith, Dennese M.

2012-12-01T23:59:59.000Z

166

Fuel Cell Power Model for CHP and CHHP Economics and Performance Analysis (Presentation)  

DOE Green Energy (OSTI)

This presentation describes the fuel cell power model for CHP and CHHP economics and performance analysis.

Steward, D.; Penev, M.

2010-03-30T23:59:59.000Z

167

Linearly Scaling 3D Fragment Method for Large-Scale Electronic Structure Calculations  

Science Conference Proceedings (OSTI)

We present a new linearly scaling three-dimensional fragment (LS3DF) method for large scale ab initio electronic structure calculations. LS3DF is based on a divide-and-conquer approach, which incorporates a novel patching scheme that effectively cancels out the artificial boundary effects due to the subdivision of the system. As a consequence, the LS3DF program yields essentially the same results as direct density functional theory (DFT) calculations. The fragments of the LS3DF algorithm can be calculated separately with different groups of processors. This leads to almost perfect parallelization on tens of thousands of processors. After code optimization, we were able to achieve 35.1 Tflop/s, which is 39percent of the theoretical speed on 17,280 Cray XT4 processor cores. Our 13,824-atom ZnTeO alloy calculation runs 400 times faster than a direct DFTcalculation, even presuming that the direct DFT calculation can scale well up to 17,280 processor cores. These results demonstrate the applicability of the LS3DF method to material simulations, the advantage of using linearly scaling algorithms over conventional O(N3) methods, and the potential for petascale computation using the LS3DF method.

Wang, Lin-Wang; Lee, Byounghak; Shan, Hongzhang; Zhao, Zhengji; Meza, Juan; Strohmaier, Erich; Bailey, David H.

2008-07-01T23:59:59.000Z

168

Linear scaling 3D fragment method for large-scale electronic structure calculations  

Science Conference Proceedings (OSTI)

We present a new linearly scaling three-dimensional fragment (LS3DF) method for large scale ab initio electronic structure calculations. LS3DF is based on a divide-and-conquer approach, which incorporates a novel patching scheme that effectively cancels out the artificial boundary effects due to the subdivision of the system. As a consequence, the LS3DF program yields essentially the same results as direct density functional theory (DFT) calculations. The fragments of the LS3DF algorithm can be calculated separately with different groups of processors. This leads to almost perfect parallelization on tens of thousands of processors. After code optimization, we were able to achieve 35.1 Tflop/s, which is 39% of the theoretical speed on 17,280 Cray XT4 processor cores. Our 13,824-atom ZnTeO alloy calculation runs 400 times faster than a direct DFT calculation, even presuming that the direct DFT calculation can scale well up to 17,280 processor cores. These results demonstrate the applicability of the LS3DF method to material simulations, the advantage of using linearly scaling algorithms over conventional O(N{sup 3}) methods, and the potential for petascale computation using the LS3DF method.

Wang, Lin-Wang; Wang, Lin-Wang; Lee, Byounghak; Shan, HongZhang; Zhao, Zhengji; Meza, Juan; Strohmaier, Erich; Bailey, David

2008-07-11T23:59:59.000Z

169

NIChE Workshop on Materials for Large-Scale Energy ...  

Science Conference Proceedings (OSTI)

... Workshop on Materials for Large-Scale Energy Storage. Purpose: This workshop will delve into the end-use applications and market drivers for large ...

2010-10-05T23:59:59.000Z

170

DOE Awards $126.6 Million for Two More Large-Scale Carbon Sequestratio...  

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

126.6 Million for Two More Large-Scale Carbon Sequestration Projects DOE Awards 126.6 Million for Two More Large-Scale Carbon Sequestration Projects May 6, 2008 - 11:30am Addthis...

171

Energy Department Awards $66.7 Million for Large-Scale Carbon...  

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

66.7 Million for Large-Scale Carbon Sequestration Project Energy Department Awards 66.7 Million for Large-Scale Carbon Sequestration Project December 18, 2007 - 4:58pm Addthis...

172

The Distinction between Large-Scale and Mesoscale Contribution to Severe Convection: A Case Study Example  

Science Conference Proceedings (OSTI)

Using a case study of a relatively modest severe weather event as an example, a framework for understanding the large-scale-mesoscale interaction is developed and discussed. Large-scale processes are limited, by definition, to those which are ...

Charles A. Doswell III

1987-03-01T23:59:59.000Z

173

A New Scalable Directory Architecture for Large-Scale Multiprocessors  

E-Print Network (OSTI)

The memory overhead introduced by directories constitutes a major hurdle in the scalability of cc-NUMA architectures, which makes the shared-memory paradigm unfeasible for very large-scale systems. This work is focused on improving the scalability of shared-memory multiprocessors by significantly reducing the size of the directory. We propose multilayer clustering as an effective approach to reduce the directory-entry width. Detailed evaluation for 64 processors shows that using this approach we can drastically reduce the memory overhead, while suffering a performance degradation very similar to previous compressed schemes (such as Coarse Vector). In addition, a novel two-level directory architecture is proposed in order to eliminate the penalty caused by these compressed directories. This organization consists of a small Full-Map firstlevel directory (which provides precise information for the most recently referenced lines) and a compressed secondlevel directory (which provides in-excess information). Results show that a system with this directory architecture can achieve the same performance as a multiprocessor with a big and non-scalable Full-Map directory, with a very significant reduction of the memory overhead.

Manuel Acacio Jos; José González; José M. García

2001-01-01T23:59:59.000Z

174

LARGE SCALE METHOD FOR THE PRODUCTION AND PURIFICATION OF CURIUM  

DOE Patents (OSTI)

A large-scale process for production and purification of Cm/sup 242/ is described. Aluminum slugs containing Am are irradiated and declad in a NaOH-- NaHO/sub 3/ solution at 85 to 100 deg C. The resulting slurry filtered and washed with NaOH, NH/sub 4/OH, and H/sub 2/O. Recovery of Cm from filtrate and washings is effected by an Fe(OH)/sub 3/ precipitation. The precipitates are then combined and dissolved ln HCl and refractory oxides centrifuged out. These oxides are then fused with Na/sub 2/CO/sub 3/ and dissolved in HCl. The solution is evaporated and LiCl solution added. The Cm, rare earths, and anionic impurities are adsorbed on a strong-base anfon exchange resin. Impurities are eluted with LiCl--HCl solution, rare earths and Cm are eluted by HCl. Other ion exchange steps further purify the Cm. The Cm is then precipitated as fluoride and used in this form or further purified and processed. (T.R.H.)

Higgins, G.H.; Crane, W.W.T.

1959-05-19T23:59:59.000Z

175

Applications of large-scale computation to particle accelerators  

SciTech Connect

The rapid growth in the power of large-scale computers has had a revolutionary effect on the study of charged-particle accelerators that is similar to the impact of smaller computers on everyday life. Before an accelerator is built, it is now the absolute rule to simulate every component and subsystem by computer to establish modes of operation and tolerances. We will bypass the important and fruitful areas of control and operation, and consider only application to design and diagnostic interpretation. Applications of computers can be divided into separate categories including: component design, system design, stability studies, cost optimization, and operating condition simulation. For the purposes of this report, we will choose a few examples from the above categories to illustrate the methods used, and discuss the significance of the work to the project. We also briefly discuss the accelerator project itself. The examples that will be discussed are: The design of accelerator structures for electron-positron linear colliders and circular colliding beam systems, simulation of the wake fields from multibunch electron beams for linear colliders. Particle-in-cell simulation of space-charge dominated beams for an experimental linear induction accelerator for Heavy Ion Fusion.

Herrmannsfeldt, W.B.

1991-05-01T23:59:59.000Z

176

Bench-Scale Evaporation of a Large Hanford Envelope C Sample (Tank 241-AN-102)  

Science Conference Proceedings (OSTI)

This report contains the results of the Bench Scale evaporation of a large sample of pretreated Envelope C (AN102).

Crowder, M.L.

2001-07-13T23:59:59.000Z

177

Report number ex. Ris-R-1234(EN) 1 Local CHP Plants between the Natural Gas and  

E-Print Network (OSTI)

conversion capacity. In particular they supply a large share of the district heating networks with heat systems, viz., district heating, gas and electricity. 1 Introduction In Denmark, three energy systems form and district heating systems meet in combined heat and power (CHP) generation facilities, of which most

178

Combined Heat & Power (CHP) -A Clean Energy Solution for Industry  

E-Print Network (OSTI)

From the late 1970's to the early 1990's cogeneration or CHP saw enormous growth, especially in the process industries. By 1994, CHP provided 42 GW of electricity generation capacity -about 6 percent of the U.S. total. Three manufacturing industries (Pulp and paper -59 Twh; Chemicals -47 Twh; Petroleum refuting -IS Twh) accounted for 85% of all cogenerated electricity in 1994. But since the mid-1990s, installation of new CHP has slowed dramatically. This slow down is due to uncertainties and policies associated with electric utility restructuring and impending environmental regulations. By 1997, a group comprising CHP manufacturers and nonprofit groups had formed to identify these CHP barriers and to work to remove them. At the same time several studies on the role of energy efficiency in greenhouse gas emissions reductions identified CHP as one of the most promising options. These studies showed a key window of opportunity-many new or updated highly-efficient and lower-cost CHP systems will become available just when the industrial "boiler baby boom" retires. These technology opportunities take advantage of advances in materials, power electronics, and computer-aided design techniques have increased equipment efficiency and reliability dramatically, while reducing costs and emissions of pollutants. This next generation of turbines, fuel cells, and reciprocating engines is the result of intensive, collaborative research, development, and demonstration by government and industry. These have allowed for new configurations that reduce size yet increase output. Turbines are now cost-effective for systems down to 50 KW, the size of a small office or restaurant. Even smaller equipment is on the horizon. However, without rapid action, this opportune nexus of market, regulatory, and technology opportunities could dissipate. In fiscal year 1999, we launched the U. S. Department of Energy CHP Challenge program. By 2002 when the Challenge is complete, it should have substantially increased the use of CHP systems in industry and buildings. We estimate that efforts such as CHP Challenge could result in more than 50 MW of additional CHP electricity generation being installed at greater than 60 percent fuel-use efficiency (nearly double the average grid efficiency) by 2010. This paper will report on the first results of CHP Challenge and discuss future activities-especially in the industrial sector.

Parks, H.; Hoffman, P.; Kurtovich, M.

1999-05-01T23:59:59.000Z

179

chp.aceee.final.rev1.doc  

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

3739 3739 Carbon Emissions Reduction Potential in the US Chemicals and Pulp and Paper Industries by Applying CHP Technologies. Marta Khrushch, Ernst Worrell, Lynn Price, Nathan Martin, and Dan Einstein Environmental Energy Technologies Division June 1999 This work was supported by the Climate Protection Division, Office of Air and Radiation, U.S. Environmental Protection Agency through the U.S. Department of Energy under Contract No. DE-AC03-76SF00098. ERNEST ORLANDO LAWRENCE BERKELEY NATIONAL LABORATORY ii Disclaimer This document was prepared as an account of work sponsored by the United States Government. While this document is believed to contain correct information, neither the United States Government nor any agency thereof, nor The Regents of the University of California, nor any of their employees, makes

180

Advanced I/O for large-scale scientific applications.  

SciTech Connect

As scientific simulations scale to use petascale machines and beyond, the data volumes generated pose a dual problem. First, with increasing machine sizes, the careful tuning of IO routines becomes more and more important to keep the time spent in IO acceptable. It is not uncommon, for instance, to have 20% of an application's runtime spent performing IO in a 'tuned' system. Careful management of the IO routines can move that to 5% or even less in some cases. Second, the data volumes are so large, on the order of 10s to 100s of TB, that trying to discover the scientifically valid contributions requires assistance at runtime to both organize and annotate the data. Waiting for offline processing is not feasible due both to the impact on the IO system and the time required. To reduce this load and improve the ability of scientists to use the large amounts of data being produced, new techniques for data management are required. First, there is a need for techniques for efficient movement of data from the compute space to storage. These techniques should understand the underlying system infrastructure and adapt to changing system conditions. Technologies include aggregation networks, data staging nodes for a closer parity to the IO subsystem, and autonomic IO routines that can detect system bottlenecks and choose different approaches, such as splitting the output into multiple targets, staggering output processes. Such methods must be end-to-end, meaning that even with properly managed asynchronous techniques, it is still essential to properly manage the later synchronous interaction with the storage system to maintain acceptable performance. Second, for the data being generated, annotations and other metadata must be incorporated to help the scientist understand output data for the simulation run as a whole, to select data and data features without concern for what files or other storage technologies were employed. All of these features should be attained while maintaining a simple deployment for the science code and eliminating the need for allocation of additional computational resources.

Klasky, Scott (Oak Ridge National Laboratory, Oak Ridge, TN); Schwan, Karsten (Georgia Institute of Technology, Atlanta, GA); Oldfield, Ron A.; Lofstead, Gerald F., II (Georgia Institute of Technology, Atlanta, GA)

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "large scale chp" 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

Open Large-Scale Online Social Network Dyn  

E-Print Network (OSTI)

Online social networks have quickly become the most popular destination on the World Wide Web. These networks are still a fairly new form of online human interaction and have gained wide popularity only recently within the past three to four years. Few models or descriptions of the dynamics of these systems exist. This is largely due to the difficulty in gaining access to the data from these networks which is often viewed as very valuable. In these networks, members maintain list of friends with which they share content with by first uploading it to the social network service provider. The content is then distributed to members by the service provider who generates a feed for each member containing the content shared by all of the member's friends aggregated together. Direct access to dynamic linkage data for these large networks is especially difficult without a special relationship with the service provider. This makes it difficult for researchers to explore and better understand how humans interface with these systems. This dissertation examines an event driven sampling approach to acquire both dynamics link event data and blog content from the site known as LiveJournal. LiveJournal is one of the oldest online social networking sites whose features are very similar to sites such as Facebook and Myspace yet smaller in scale as to be practical for a research setting. The event driven sampling methodology and analysis of the resulting network model provide insights for other researchers interested in acquiring social network dynamics from LiveJournal or insight into what might be expected if an event driven sampling approach was applied to other online social networks. A detailed analysis of both the static structure and network dynamics of the resulting network model was performed. The analysis helped motivated work on a model of link prediction using both topological and content-based metrics. The relationship between topological and content-based metrics was explored. Factored into the link prediction analysis is the open nature of the social network data where new members are constantly joining and current members are leaving. The data used for the analysis spanned approximately two years.

Corlette, Daniel James

2011-05-01T23:59:59.000Z

182

GAS MIXING ANALYSIS IN A LARGE-SCALED SALTSTONE FACILITY  

SciTech Connect

Computational fluid dynamics (CFD) methods have been used to estimate the flow patterns mainly driven by temperature gradients inside vapor space in a large-scaled Saltstone vault facility at Savannah River site (SRS). The purpose of this work is to examine the gas motions inside the vapor space under the current vault configurations by taking a three-dimensional transient momentum-energy coupled approach for the vapor space domain of the vault. The modeling calculations were based on prototypic vault geometry and expected normal operating conditions as defined by Waste Solidification Engineering. The modeling analysis was focused on the air flow patterns near the ventilated corner zones of the vapor space inside the Saltstone vault. The turbulence behavior and natural convection mechanism used in the present model were benchmarked against the literature information and theoretical results. The verified model was applied to the Saltstone vault geometry for the transient assessment of the air flow patterns inside the vapor space of the vault region using the potential operating conditions. The baseline model considered two cases for the estimations of the flow patterns within the vapor space. One is the reference nominal case. The other is for the negative temperature gradient between the roof inner and top grout surface temperatures intended for the potential bounding condition. The flow patterns of the vapor space calculated by the CFD model demonstrate that the ambient air comes into the vapor space of the vault through the lower-end ventilation hole, and it gets heated up by the Benard-cell type circulation before leaving the vault via the higher-end ventilation hole. The calculated results are consistent with the literature information. Detailed results and the cases considered in the calculations will be discussed here.

Lee, S

2008-05-28T23:59:59.000Z

183

Metal ion implantation for large scale surface modification  

Science Conference Proceedings (OSTI)

Intense energetic beams of metal ions can be produced by using a metal vapor vacuum arc as the plasma discharge from which the ion beam is formed. We have developed a number of ion sources of this kind and have built a metal ion implantation facility which can produce repetitively pulsed ion beams with mean ion energy up to several hundred key, pulsed beam current of more than an ampere, and time averaged current of several tens of milliamperes delivered onto a downstream target. We've also done some preliminary work on scaling up this technology to very large size. For example, a 50-cm diameter (2000 cm[sup 2]) set of beam formation electrodes was used to produce a pulsed titanium beam with ion current over 7 amperes at a mean ion energy of 100 key. Separately, a dc embodiment has been used to produce a dc titanium ion beam with current over 600 mA, power supply limited in this work, and up to 6 amperes of dc plasma ion current was maintained for over an hour. In a related program we've developed a plasma immersion method for applying thin metallic and compound films in which the added species is atomically mixed to the substrate. By adding a gas flow to the process, well-bonded compound films can also be formed; metallic films and multilayers as well as oxides and nitrides with mixed transition zones some hundreds of angstroms thick have been synthesized. Here we outline these parallel metal-plasma-based research programs and describe the hardware that we've developed and some of the surface modification research that we've done with it.

Brown, I.G.

1992-10-01T23:59:59.000Z

184

Large Scale Computing and Storage Requirements for Nuclear Physics Research  

SciTech Connect

IThe National Energy Research Scientific Computing Center (NERSC) is the primary computing center for the DOE Office of Science, serving approximately 4,000 users and hosting some 550 projects that involve nearly 700 codes for a wide variety of scientific disciplines. In addition to large-scale computing resources NERSC provides critical staff support and expertise to help scientists make the most efficient use of these resources to advance the scientific mission of the Office of Science. In May 2011, NERSC, DOE’s Office of Advanced Scientific Computing Research (ASCR) and DOE’s Office of Nuclear Physics (NP) held a workshop to characterize HPC requirements for NP research over the next three to five years. The effort is part of NERSC’s continuing involvement in anticipating future user needs and deploying necessary resources to meet these demands. The workshop revealed several key requirements, in addition to achieving its goal of characterizing NP computing. The key requirements include: 1. Larger allocations of computational resources at NERSC; 2. Visualization and analytics support; and 3. Support at NERSC for the unique needs of experimental nuclear physicists. This report expands upon these key points and adds others. The results are based upon representative samples, called “case studies,” of the needs of science teams within NP. The case studies were prepared by NP workshop participants and contain a summary of science goals, methods of solution, current and future computing requirements, and special software and support needs. Participants were also asked to describe their strategy for computing in the highly parallel, “multi-core” environment that is expected to dominate HPC architectures over the next few years. The report also includes a section with NERSC responses to the workshop findings. NERSC has many initiatives already underway that address key workshop findings and all of the action items are aligned with NERSC strategic plans.

Gerber, Richard A.; Wasserman, Harvey J.

2012-03-02T23:59:59.000Z

185

Bayesian Uncertainty Quantification for Large Scale Spatial Inverse Problems  

E-Print Network (OSTI)

We considered a Bayesian approach to nonlinear inverse problems in which the unknown quantity is a high dimension spatial field. The Bayesian approach contains a natural mechanism for regularization in the form of prior information, can incorporate information from heterogeneous sources and provides a quantitative assessment of uncertainty in the inverse solution. The Bayesian setting casts the inverse solution as a posterior probability distribution over the model parameters. Karhunen-Lo'eve expansion and Discrete Cosine transform were used for dimension reduction of the random spatial field. Furthermore, we used a hierarchical Bayes model to inject multiscale data in the modeling framework. In this Bayesian framework, we have shown that this inverse problem is well-posed by proving that the posterior measure is Lipschitz continuous with respect to the data in total variation norm. The need for multiple evaluations of the forward model on a high dimension spatial field (e.g. in the context of MCMC) together with the high dimensionality of the posterior, results in many computation challenges. We developed two-stage reversible jump MCMC method which has the ability to screen the bad proposals in the first inexpensive stage. Channelized spatial fields were represented by facies boundaries and variogram-based spatial fields within each facies. Using level-set based approach, the shape of the channel boundaries was updated with dynamic data using a Bayesian hierarchical model where the number of points representing the channel boundaries is assumed to be unknown. Statistical emulators on a large scale spatial field were introduced to avoid the expensive likelihood calculation, which contains the forward simulator, at each iteration of the MCMC step. To build the emulator, the original spatial field was represented by a low dimensional parameterization using Discrete Cosine Transform (DCT), then the Bayesian approach to multivariate adaptive regression spline (BMARS) was used to emulate the simulator. Various numerical results were presented by analyzing simulated as well as real data.

Mondal, Anirban

2011-08-01T23:59:59.000Z

186

Large Scale Computing and Storage Requirements for High Energy Physics  

Science Conference Proceedings (OSTI)

The National Energy Research Scientific Computing Center (NERSC) is the leading scientific computing facility for the Department of Energy's Office of Science, providing high-performance computing (HPC) resources to more than 3,000 researchers working on about 400 projects. NERSC provides large-scale computing resources and, crucially, the support and expertise needed for scientists to make effective use of them. In November 2009, NERSC, DOE's Office of Advanced Scientific Computing Research (ASCR), and DOE's Office of High Energy Physics (HEP) held a workshop to characterize the HPC resources needed at NERSC to support HEP research through the next three to five years. The effort is part of NERSC's legacy of anticipating users needs and deploying resources to meet those demands. The workshop revealed several key points, in addition to achieving its goal of collecting and characterizing computing requirements. The chief findings: (1) Science teams need access to a significant increase in computational resources to meet their research goals; (2) Research teams need to be able to read, write, transfer, store online, archive, analyze, and share huge volumes of data; (3) Science teams need guidance and support to implement their codes on future architectures; and (4) Projects need predictable, rapid turnaround of their computational jobs to meet mission-critical time constraints. This report expands upon these key points and includes others. It also presents a number of case studies as representative of the research conducted within HEP. Workshop participants were asked to codify their requirements in this case study format, summarizing their science goals, methods of solution, current and three-to-five year computing requirements, and software and support needs. Participants were also asked to describe their strategy for computing in the highly parallel, multi-core environment that is expected to dominate HPC architectures over the next few years. The report includes a section that describes efforts already underway or planned at NERSC that address requirements collected at the workshop. NERSC has many initiatives in progress that address key workshop findings and are aligned with NERSC's strategic plans.

Gerber, Richard A.; Wasserman, Harvey

2010-11-24T23:59:59.000Z

187

The Linearly Scaling 3D Fragment Method for Large Scale Electronic Structure Calculations  

Science Conference Proceedings (OSTI)

The Linearly Scaling three-dimensional fragment (LS3DF) method is an O(N) ab initio electronic structure method for large-scale nano material simulations. It is a divide-and-conquer approach with a novel patching scheme that effectively cancels out the artificial boundary effects, which exist in all divide-and-conquer schemes. This method has made ab initio simulations of thousand-atom nanosystems feasible in a couple of hours, while retaining essentially the same accuracy as the direct calculation methods. The LS3DF method won the 2008 ACM Gordon Bell Prize for algorithm innovation. Our code has reached 442 Tflop/s running on 147,456 processors on the Cray XT5 (Jaguar) at OLCF, and has been run on 163,840 processors on the Blue Gene/P (Intrepid) at ALCF, and has been applied to a system containing 36,000 atoms. In this paper, we will present the recent parallel performance results of this code, and will apply the method to asymmetric CdSe/CdS core/shell nanorods, which have potential applications in electronic devices and solar cells.

Zhao, Zhengji; Meza, Juan; Lee, Byounghak; Shan, Hongzhang; Strohmaier, Erich; Bailey, David; Wang, Lin-Wang

2009-06-26T23:59:59.000Z

188

Large-scale Excited Electron Molecular Mechanics/Dynamics  

Science Conference Proceedings (OSTI)

Abstract Scope, To simulate large electronically excited systems, we have developed [at the Materials and Process Simulation Center at Caltech] a molecular ...

189

Exploiting separability in large-scale Support Vector Machine training  

E-Print Network (OSTI)

Aug 8, 2007 ... Abstract: Linear support vector machine training can be represented as a large quadratic program. We present an efficient and numerically ...

190

Online job provisioning for large scale science experiments over an optical grid infrastructure  

Science Conference Proceedings (OSTI)

Many emerging science experiments require that the massive data generated by big instruments be accessible and analyzed by a large number of geographically dispersed users. Such large scale science experiments are enabled by an Optical Grid infrastructure ... Keywords: WDM network, grid, job provisioning, large scale science experiment, resource co-scheduling

Xiang Yu; Chunming Qiao; Dantong Yu

2009-04-01T23:59:59.000Z

191

On the Order Optimality of Large-scale Underwater Networks  

E-Print Network (OSTI)

Capacity scaling laws are analyzed in an underwater acoustic network with $n$ regularly located nodes on a square, in which both bandwidth and received signal power can be limited significantly. A narrow-band model is assumed where the carrier frequency is allowed to scale as a function of $n$. In the network, we characterize an attenuation parameter that depends on the frequency scaling as well as the transmission distance. Cut-set upper bounds on the throughput scaling are then derived in both extended and dense networks having unit node density and unit area, respectively. It is first analyzed that under extended networks, the upper bound is inversely proportional to the attenuation parameter, thus resulting in a highly power-limited network. Interestingly, it is seen that the upper bound for extended networks is intrinsically related to the attenuation parameter but not the spreading factor. On the other hand, in dense networks, we show that there exists either a bandwidth or power limitation, or both, ac...

Shin, Won-Yong; Medard, Muriel; Stojanovic, Milica; Tarokh, Vahid

2011-01-01T23:59:59.000Z

192

Decomposition Methods for Large Scale LP Decoding - Optimization ...  

E-Print Network (OSTI)

decoding when implemented with standard LP solvers does not easily scale to the ... not automatically exploit the rich structure inherent to the linear program. ...... To show that (4.10) is satisfied is straightforward for the cases q ? r and q ? r+2. ...... behavior, in particular word-error-rate and execution-time statistics, as a

193

Comparing Large-Scale Hydrological Model Simulations to Observed Runoff Percentiles in Europe  

Science Conference Proceedings (OSTI)

Large-scale hydrological models describing the terrestrial water balance at continental and global scales are increasingly being used in earth system modeling and climate impact assessments. However, because of incomplete process understanding and ...

Lukas Gudmundsson; Lena M. Tallaksen; Kerstin Stahl; Douglas B. Clark; Egon Dumont; Stefan Hagemann; Nathalie Bertrand; Dieter Gerten; Jens Heinke; Naota Hanasaki; Frank Voss; Sujan Koirala

2012-04-01T23:59:59.000Z

194

Large-Scale Vertical and Horizontal Circulation in the North Atlantic Ocean  

Science Conference Proceedings (OSTI)

Observations of large-scale hydrography, air–sea forcing, and regional circulation from numerous studies are combined by inverse methods to determine the basin-scale circulation, average diapycnal mixing, and adjustments to air–sea forcing of the ...

Rick Lumpkin; Kevin Speer

2003-09-01T23:59:59.000Z

195

Improved Bounds for Large Scale Capacitated Arc Routing Problem  

E-Print Network (OSTI)

ply a modified Iterated Local Search procedure to Capacitated Vehicle .... ?(S) must be deadheaded because each vehicle entering the set S must leave ...... algorithm clearly outperformed, in terms of solution quality, those that dealt with large.

196

Large-Scale Parallel Computing of Cloud Resolving Storm Simulator  

Science Conference Proceedings (OSTI)

A sever thunderstorm is composed of strong convective clouds. In order to perform a simulation of this type of storms, a very finegrid system is necessary to resolve individual convective clouds within a large domain. Since convective clouds are highly ...

Kazuhisa Tsuboki; Atsushi Sakakibara

2002-05-01T23:59:59.000Z

197

Large scale production of syntactic annotations to move forward  

Science Conference Proceedings (OSTI)

This article presents the methodology of the PASSAGE project, aiming at syntactically annotating large corpora by composing annotations. It introduces the annotation format and the syntactic annotation specifications. It describes an important component ...

Patrick Paroubek; Anne Vilnat; Sylvain Loiseau; Olivier Hamon; Gil Francopoulo; Eric Villemonte de la Clergerie

2008-08-01T23:59:59.000Z

198

Feasibility of Large-Scale CO2 Ocean Sequestration  

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

dioxide (CO 2 ) and other greenhouse gas emissions, due in large part to the burning of fossil fuels for energy consumption, has spawned debate over global climate change and...

199

NETL: News Release - DOE Awards First Three Large-Scale Carbon...  

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

9, 2007 DOE Awards First Three Large-Scale Carbon Sequestration Projects U.S. Projects Total 318 Million and Further President Bush's Initiatives to Advance Clean Energy...

200

Large-scale solar projects in the United States have made great...  

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

the United States have made great progress in delivering competitively priced renewable electricity September 2013 The price at which electricity from large-scale solar power...

Note: This page contains sample records for the topic "large scale chp" 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

A Topological Framework for the Interactive Exploration of Large Scale Turbulent Combustion  

E-Print Network (OSTI)

comparison of terascale combustion simulation data. Mathe-premixed hydrogen ?ames. Combustion and Flame, [7] J. L.of Large Scale Turbulent Combustion Peer-Timo Bremer 1 ,

Bremer, Peer-Timo

2010-01-01T23:59:59.000Z

202

A Tractable Approach to Understanding the Results from Large-Scale 3D Transient  

E-Print Network (OSTI)

) problems or NASA's HPCC (High Performance Computing & Communication) grand challenges, can easily. Introduction Large-scale simulations of physical phenomena on high performance computing systems (often on mas

Peraire, Jaime

203

Technical R eport A practical method for solving large-scale TRS  

E-Print Network (OSTI)

R eport. University of Patras. Department of Mathematics. GR-265 04 Patras, Greece. http://www.math.upatras.gr/. A practical method for solving large-scale TRS.

204

Agent Based Modeling of large- scale socio-technical metal networks  

Science Conference Proceedings (OSTI)

17-02-10. Challenge the future. Delft. University of. Technology. Agent Based Modeling of large- scale socio-technical metal networks. Dr. Igor Nikolic, A.

205

ESS 2012 Peer Review - Nitrogen-Oxygen Battery for Large Scale...  

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

2012 Frank Delnick, David Ingersoll, Karen Waldrip, Peter Feibelman NitrogenOxygen Battery A Transformational Architecture for Large Scale Energy Storage Power Sources...

206

NREL: News - NREL Offers an Open-Source Solution for Large-Scale...  

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

Version News Release NR-3613 NREL Offers an Open-Source Solution for Large-Scale Energy Data Collection and Analysis June 18, 2013 The Energy Department's National...

207

System aspects of large scale implementation of a photovoltaic power plant.  

E-Print Network (OSTI)

?? In this thesis the static and dynamic behavior of large scale grid connected PV power plants are analyzed. A model of a 15 MW… (more)

Ruiz, Álvaro

2011-01-01T23:59:59.000Z

208

Market Assessment of Biomass Gasification and Combustion Technology for Small- and Medium-Scale Applications  

DOE Green Energy (OSTI)

This report provides a market assessment of gasification and direct combustion technologies that use wood and agricultural resources to generate heat, power, or combined heat and power (CHP) for small- to medium-scale applications. It contains a brief overview of wood and agricultural resources in the U.S.; a description and discussion of gasification and combustion conversion technologies that utilize solid biomass to generate heat, power, and CHP; an assessment of the commercial status of gasification and combustion technologies; a summary of gasification and combustion system economics; a discussion of the market potential for small- to medium-scale gasification and combustion systems; and an inventory of direct combustion system suppliers and gasification technology companies. The report indicates that while direct combustion and close-coupled gasification boiler systems used to generate heat, power, or CHP are commercially available from a number of manufacturers, two-stage gasification systems are largely in development, with a number of technologies currently in demonstration. The report also cites the need for a searchable, comprehensive database of operating combustion and gasification systems that generate heat, power, or CHP built in the U.S., as well as a national assessment of the market potential for the systems.

Peterson, D.; Haase, S.

2009-07-01T23:59:59.000Z

209

Large-scale clustering and complete facet and tag calculation  

Science Conference Proceedings (OSTI)

The State and University Library of Denmark is developing an integrated search system called Summa, and as part of the Summa project a clustering module and a facet module. Simple clusters have been created for a collection of more than six and a half ... Keywords: categorisation, clustering, faceted browsing, large data sets, library metadata

Bolette Ammitzbøll Madsen

2007-09-01T23:59:59.000Z

210

A Cutting Plane Algorithm for Large Scale Semidefinite Relaxations  

E-Print Network (OSTI)

Oct 10, 2001 ... pr o gramm i ng , s p ect ral b undle m et h o d , s u b grad ie n t m et h o d ... b y so lv i ng se v e ral larg e sc ale, un st ru ct ur e d 0 -1 li n e ar pr ...

211

Efficient packet marking for large-scale IP traceback  

Science Conference Proceedings (OSTI)

We present a new approach to IP traceback based on the probabilistic packet marking paradigm. Our approach, which we call randomize-and-link, uses large checksum cords to "link" message fragments in a way that is highly scalable, for the checksums serve ... Keywords: denial-of-service, packet marking, traceback

Michael T. Goodrich

2002-11-01T23:59:59.000Z

212

Probabilistic packet marking for large-scale IP traceback  

Science Conference Proceedings (OSTI)

This paper presents an approach to IP traceback based on the probabilistic packet marking paradigm. Our approach, which we call randomize-and-link, uses large checksum cords to "link" message fragments in a way that is highly scalable, for the checksums ... Keywords: IP, associate addresses, checksum cords, denial of service (DDOS), distributed, probabilistic packet marking, traceback

Michael T. Goodrich

2008-02-01T23:59:59.000Z

213

A Demonstration That Large-Scale Warming Is Not Urban  

Science Conference Proceedings (OSTI)

On the premise that urban heat islands are strongest in calm conditions but are largely absent in windy weather, daily minimum and maximum air temperatures for the period 1950–2000 at a worldwide selection of land stations are analyzed separately ...

David E. Parker

2006-06-01T23:59:59.000Z

214

Scale-free, self-organizing very large sensor networks  

Science Conference Proceedings (OSTI)

In this paper we introduce SFSN, an algorithm for self-organization of Very Large Sensor Networks (VLSN). The 10^6 or more tiny and inexpensive sensors of a VLSN are indistinguishable from one another; they do not have either a physical or a logical ... Keywords: Anonymous nodes, Collision resolution algorithm, Event, Multiple access, Self-organization, Sensor networks

Dan C. Marinescu; Chen Yu; Gabriela M. Marinescu

2010-05-01T23:59:59.000Z

215

Accelerating large-scale data exploration through data diffusion  

Science Conference Proceedings (OSTI)

Data-intensive applications often require exploratory analysis of large datasets. If analysis is performed on distributed resources, data locality can be crucial to high throughput and performance. We propose a "data diffusion" approach that acquires ... Keywords: Falkon, Swift, data caching, data diffusion, data management, data-aware scheduling, data-intensive applications, grid

Ioan Raicu; Yong Zhao; Ian T. Foster; Alex Szalay

2008-06-01T23:59:59.000Z

216

Identifying web strategies for large-scale firms  

Science Conference Proceedings (OSTI)

The World Wide Web has become increasingly important in helping businesses stay competitive. Hence, in the current business environment, it is essential for large firms in established industries to take advantage of the Web and all it has to offer in ... Keywords: integration, internet, organizational goals, strategy, web

Tuncay Bayrak

2008-07-01T23:59:59.000Z

217

A virtual infrastructure for large-scale wireless sensor networks  

Science Conference Proceedings (OSTI)

The primary goal of a wireless sensor network is to collect useful information from the network. Most wireless sensor networks are assumed that the number of nodes are very large and they should operate with confined resources. Consequently it is important ... Keywords: Data collection, Railroad, Topology, Wireless sensor networks

Jeong-Hun Shin; Daeyeon Park

2007-10-01T23:59:59.000Z

218

Estimating Large-Scale Precipitation Minus Evapotranspiration from GRACE Satellite Gravity Measurements  

Science Conference Proceedings (OSTI)

Currently, observations of key components of the earth's large-scale water and energy budgets are sparse or even nonexistent. One key component, precipitation minus evapotranspiration (P ? ET), remains largely unmeasured due to the absence of ...

Sean Swenson; John Wahr

2006-04-01T23:59:59.000Z

219

Large-Scale Atmospheric Forcing by Southeast Pacific Boundary Layer Clouds: A Regional Model Study  

Science Conference Proceedings (OSTI)

A regional model is used to study the radiative effect of boundary layer clouds over the southeast Pacific on large-scale atmosphere circulation during August–October 1999. With the standard settings, the model simulates reasonably well the large-...

Yuqing Wang; Shang-Ping Xie; Bin Wang; Haiming Xu

2005-04-01T23:59:59.000Z

220

Large-Eddy Simulation of Air Parcels in Stratocumulus Clouds: Time Scales and Spatial Variability  

Science Conference Proceedings (OSTI)

Large ensembles of air parcel trajectories driven by the (large-eddy simulation) LES-generated velocity fields from simulations of stratocumulus clouds were analyzed, focusing on statistics of air parcel in-cloud time scales, as well as their ...

Yefim L. Kogan

2006-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "large scale chp" 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

MEMPHYS:A large scale water Cerenkov detector at Fréjus  

E-Print Network (OSTI)

A water \\v{C}erenkov detector project, of megaton scale, to be installed in the Fr\\'ejus underground site and dedicated to nucleon decay, neutrinos from supernovae, solar and atmospheric neutrinos, as well as neutrinos from a super-beam and/or a beta-beam coming from CERN, is presented and compared with competitor projects in Japan and in the USA. The performances of the European project are discussed, including the possibility to measure the mixing angle $\\theta_{13}$ and the CP-violating phase $\\delta$.

A. de Bellefon; J. Bouchez; J. Busto; J. -E. Campagne; C. Cavata; J. Dolbeau; J. Dumarchez; P. Gorodetzky; S. Katsanevas; M. Mezzetto; L. Mosca; T. Patzak; P. Salin; A. Tonazzo; C. Volpe

2006-07-17T23:59:59.000Z

222

Monitoring and Commissioning Verification Algorithms for CHP Systems  

Science Conference Proceedings (OSTI)

This document provides the algorithms for CHP system performance monitoring and commissioning verification (CxV). It starts by presenting system-level and component-level performance metrics, followed by descriptions of algorithms for performance monitoring and commissioning verification, using the metric presented earlier. Verification of commissioning is accomplished essentially by comparing actual measured performance to benchmarks for performance provided by the system integrator and/or component manufacturers. The results of these comparisons are then automatically interpreted to provide conclusions regarding whether the CHP system and its components have been properly commissioned and where problems are found, guidance is provided for corrections. A discussion of uncertainty handling is then provided, which is followed by a description of how simulations models can be used to generate data for testing the algorithms. A model is described for simulating a CHP system consisting of a micro-turbine, an exhaust-gas heat recovery unit that produces hot water, a absorption chiller and a cooling tower. The process for using this model for generating data for testing the algorithms for a selected set of faults is described. The next section applies the algorithms developed to CHP laboratory and field data to illustrate their use. The report then concludes with a discussion of the need for laboratory testing of the algorithms on a physical CHP systems and identification of the recommended next steps.

Brambley, Michael R.; Katipamula, Srinivas; Jiang, Wei

2008-03-31T23:59:59.000Z

223

ELECTRIC VEHICLE BASED BATTERY STORAGES FOR LARGE SCALE WIND POWER INTEGRATION  

E-Print Network (OSTI)

Coherent Energy and Environment System Analysis CHP Combined Heat and Power CPP Condensing Power Plant DPL system and the thermal based power systems of Europe through Germany. The Western part of Denmark includes 6500MW of wind power plants (4000MW from distributed onshore wind farms and 2500MW from offshore

Pillai, Jayakrishnan Radhakrishna

224

A Bootstrap Technique for Testing the Relationship between Local-Scale Radar Observations of Cloud Occurrence and Large-Scale Atmospheric Fields  

Science Conference Proceedings (OSTI)

A classification scheme is created to map the synoptic-scale (large scale) atmospheric state to distributions of local-scale cloud properties. This mapping is accomplished by a neural network that classifies 17 months of synoptic-scale initial ...

Roger Marchand; Nathaniel Beagley; Sandra E. Thompson; Thomas P. Ackerman; David M. Schultz

2006-11-01T23:59:59.000Z

225

Inflationary susceptibilities, duality and large-scale magnetic fields generation  

E-Print Network (OSTI)

We investigate what can be said about the interaction of scalar fields with Abelian gauge fields during a quasi-de Sitter phase of expansion and under the assumption that the electric and the magnetic susceptibilities do not coincide. The duality symmetry, transforming the magnetic susceptibility into the inverse of the electric susceptibility, exchanges the magnetic and electric power spectra. The mismatch between the two susceptibilities determines an effective refractive index affecting the evolution of the canonical fields. The constraints imposed by the duration of the inflationary phase and by the magnetogenesis requirements pin down the rate of variation of the susceptibilities that is consistent with the observations of the magnetic field strength over astrophysical and cosmological scales but avoids back-reaction problems. The parameter space of this magnetogenesis scenario is wider than in the case when the susceptibilities are equal, as it happens when the inflaton or some other spectator field is solely coupled to the standard gauge kinetic term.

Massimo Giovannini

2013-10-07T23:59:59.000Z

226

Incentive systems for large-scale energy projects  

Science Conference Proceedings (OSTI)

The potential benefits to be obtained and costs incurred from imposing an incentive rate of return system on a project which is government subsidized or is being considered by a regulated utility are described. The logical and procedural steps for measuring cost performance and determining the reward/penalty function for such a system are developed. An important certainty-enhancing feature is discussed. Then two real incentive return systems for large construction projects currently in place are critically appraised in light of criteria previously developed. 24 references, 4 figures, 3 tables.

Hass, J.E.

1984-01-01T23:59:59.000Z

227

Solar and CHP Sales Tax Exemption (Florida) | Department of Energy  

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

and CHP Sales Tax Exemption (Florida) and CHP Sales Tax Exemption (Florida) Solar and CHP Sales Tax Exemption (Florida) < Back Eligibility Agricultural Commercial General Public/Consumer Residential Savings Category Commercial Heating & Cooling Manufacturing Buying & Making Electricity Solar Heating & Cooling Swimming Pool Heaters Water Heating Heating Maximum Rebate No limit Program Info Start Date 07/01/1997 State Florida Program Type Sales Tax Incentive Rebate Amount All Provider Florida Department of Revenue Solar energy systems have been exempt from Florida's sales and use tax since July 1, 1997. The term "solar energy system" means the equipment and requisite hardware that provide and are used for collecting, transferring, converting, storing or using incidental solar energy for water heating,

228

Level-of-detail rendering of large-scale irregular volume datasets using particles  

Science Conference Proceedings (OSTI)

This paper describes a level-of-detail rendering technique for large-scale irregular volume datasets. It is well known that the memory bandwidth consumed by visibility sorting becomes the limiting factor when carrying out volume rendering of such datasets. ... Keywords: large-scale irregular volume, level-of-detail, volume rendering of unstructured meshes

Takuma Kawamura; Naohisa Sakamoto; Koji Koyamada

2010-09-01T23:59:59.000Z

229

An adaptive clustering-based resource discovery scheme for large scale MANETs  

Science Conference Proceedings (OSTI)

An increasing number of smart mobile devices offering the ability to perform various types of ubiquitous computation are emerging as large computer networks with an unprecedented scale. Large Scale Mobile Ad Hoc Networks (MANETs) place strong challenges ... Keywords: adaptive network clustering, distributed algorithms, mobile ad hoc networks, multi-hop head-based non-overlapping clustering, network resource discovery

Saad Al-Ahmadi; Abdullah Al-Dhelaan

2012-04-01T23:59:59.000Z

230

Structural fatigue assessment and management of large-scale port logistics equipments  

Science Conference Proceedings (OSTI)

With the advances of port enterprises, much intensive research has been gradually involved in the structural fatigue assessment and management of port logistics equipments. However, relevant work on large-scale port logistics equipments is still ... Keywords: S-N curve, crack formation, crack propagation life, fatigue assessment, fracture mechanics, gantry cranes, large-scale port logistics equipment, structural safety assessment

Yuan Liu; Weijian Mi; Huiqiang Zheng

2008-11-01T23:59:59.000Z

231

A time management optimization framework for large-scale distributed hardware-in-the-loop simulation  

Science Conference Proceedings (OSTI)

Large-scale distributed HIL(Hardware-In-The-Loop) simulation is an important and indispensable method for testing and verifying complex engineering systems. An important necessary condition for realizing HIL simulation is that the speedup ratio of full-speed ... Keywords: hardware-in-the-loop simulation, large-scale distributed simulation, optimization framework, speedup ratio of simulation, time management

Wei Dong

2013-05-01T23:59:59.000Z

232

A Topological Framework for the Interactive Exploration of Large Scale Turbulent Combustion  

E-Print Network (OSTI)

A Topological Framework for the Interactive Exploration of Large Scale Turbulent Combustion Peer a new topological framework for the analysis of large scale, time-varying, turbulent combustion consumption thresh- olds for an entire time-dependent combustion simulation. By computing augmented merge

Tierny, Julien

233

Large scale continuous visual event recognition using max-margin Hough transformation framework  

Science Conference Proceedings (OSTI)

In this paper we propose a novel method for continuous visual event recognition (CVER) on a large scale video dataset using max-margin Hough transformation framework. Due to high scalability, diverse real environmental state and wide scene variability ... Keywords: Continuous visual event, Event detection, Large scale, Max-margin Hough transform

Bhaskar Chakraborty, Jordi Gonzílez, F. Xavier Roca

2013-10-01T23:59:59.000Z

234

A study of dynamic meta-learning for failure prediction in large-scale systems  

Science Conference Proceedings (OSTI)

Despite years of study on failure prediction, it remains an open problem, especially in large-scale systems composed of vast amount of components. In this paper, we present a dynamic meta-learning framework for failure prediction. It intends to not only ... Keywords: Blue Gene, Dynamic techniques, Failure prediction, Large-scale systems, Meta-learning

Zhiling Lan; Jiexing Gu; Ziming Zheng; Rajeev Thakur; Susan Coghlan

2010-06-01T23:59:59.000Z

235

Remote visualization of large scale data for ultra-high resolution display environments  

Science Conference Proceedings (OSTI)

ParaView is one of the most widely used scientific tools that support parallel visualization of large scale data. The Scalable Adaptive Graphics Environment (SAGE) is a graphics middleware that enables real-time streaming of ultra-high resolution visual ... Keywords: ParaView, SAGE, large-scale data, remote visualization, ultra-high resolution visualization

Sungwon Nam; Byungil Jeong; Luc Renambot; Andrew Johnson; Kelly Gaither; Jason Leigh

2009-11-01T23:59:59.000Z

236

The Roles of Mean Meridional Motions and Large-Scale Eddies in Zonally Averaged Circulations  

Science Conference Proceedings (OSTI)

A hierarchy of zonally averaged atmospheric models is used to study the role of mean meridional motions and large-scale eddies in determining the zonal climate. Five models are developed: a radiative-convective equilibrium model (no large-scale ...

Karl E. Taylor

1980-01-01T23:59:59.000Z

237

Large-Scale Integration of Deferrable Demand and Renewable Energy Sources  

E-Print Network (OSTI)

1 Large-Scale Integration of Deferrable Demand and Renewable Energy Sources Anthony Papavasiliou model for assessing the impacts of the large-scale integration of renewable energy sources. In order to accurately assess the impacts of renewable energy integration and demand response integration

Oren, Shmuel S.

238

U.S. Energy Infrastructure Investment: Large-Scale Integrated Smart Grid  

E-Print Network (OSTI)

U.S. Energy Infrastructure Investment: Large-Scale Integrated Smart Grid Solutions with High: LargeScale Integrated Smart Grid Solutions with High Penetration of Renewable Resources, Dispersed- ing electricity grid. Much attention is being given to smart grid development in the U.S. and around

239

Large-Scale Hybrid Dynamic Simulation Employing Field Measurements  

Science Conference Proceedings (OSTI)

Simulation and measurements are two primary ways for power engineers to gain understanding of system behaviors and thus accomplish tasks in system planning and operation. Many well-developed simulation tools are available in today's market. On the other hand, large amount of measured data can be obtained from traditional SCADA systems and currently fast growing phasor networks. However, simulation and measurement are still two separate worlds. There is a need to combine the advantages of simulation and measurements. In view of this, this paper proposes the concept of hybrid dynamic simulation which opens up traditional simulation by providing entries for measurements. A method is presented to implement hybrid simulation with PSLF/PSDS. Test studies show the validity of the proposed hybrid simulation method. Applications of such hybrid simulation include system event playback, model validation, and software validation.

Huang, Zhenyu; Guttromson, Ross T.; Hauer, John F.

2004-06-30T23:59:59.000Z

240

Large-scale Renewable Energy Projects (Larger than 10 MWs) | Department of  

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

Large-scale Renewable Energy Projects (Larger than 10 MWs) Large-scale Renewable Energy Projects (Larger than 10 MWs) Large-scale Renewable Energy Projects (Larger than 10 MWs) October 7, 2013 - 9:32am Addthis Renewable energy projects larger than 10 megawatts (MW) are complex and typically require private-sector financing. The Federal Energy Management Program (FEMP) developed a guide to help Federal agencies, and the developers and financiers that work with them, to successfully install these projects at Federal facilities. The Large-Scale Renewable Energy Guide: Developing Renewable Energy Projects Larger than 10 MWs at Federal Facilities: A Practical Guide to Getting Large-Scale Renewable Energy Projects Financed with Private Capital provides a framework to allow the Federal Government, private developers, and financiers to work in a

Note: This page contains sample records for the topic "large scale chp" 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

Hungary-Employment Impacts of a Large-Scale Deep Building Retrofit  

Open Energy Info (EERE)

Hungary-Employment Impacts of a Large-Scale Deep Building Retrofit Hungary-Employment Impacts of a Large-Scale Deep Building Retrofit Programme Jump to: navigation, search Name Hungary-Employment Impacts of a Large-Scale Deep Building Retrofit Programme Agency/Company /Organization European Climate Foundation Sector Energy Focus Area Energy Efficiency, Buildings, - Building Energy Efficiency Topics Co-benefits assessment, Background analysis Resource Type Publications Website http://3csep.ceu.hu/sites/defa Country Hungary UN Region Eastern Europe References Hungary-Employment Impacts of a Large-Scale Deep Building Retrofit Programme[1] Hungary-Employment Impacts of a Large-Scale Deep Building Retrofit Programme Screenshot "The goal of the present research was to gauge the net employment impacts of a largescale deep building energy-efficiency renovation programme in

242

Strategies to Finance Large-Scale Deployment of Renewable Energy Projects:  

Open Energy Info (EERE)

Strategies to Finance Large-Scale Deployment of Renewable Energy Projects: Strategies to Finance Large-Scale Deployment of Renewable Energy Projects: An Economic Development and Infrastructure Approach Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Strategies to Finance Large-Scale Deployment of Renewable Energy Projects: An Economic Development and Infrastructure Approach Agency/Company /Organization: International Energy Agency (IEA) Sector: Energy Focus Area: Renewable Energy Topics: Finance, Implementation, Policies/deployment programs Resource Type: Publications Website: iea-retd.org/archives/publications/finance-re Cost: Free Language: English Strategies to Finance Large-Scale Deployment of Renewable Energy Projects: An Economic Development and Infrastructure Approach Screenshot References: Strategies to Finance Large-Scale Deployment of Renewable Energy Projects: An Economic Development and Infrastructure Approach[1]

243

Hybrid CH&P PON-11-507 Page 1 of 19  

E-Print Network (OSTI)

Hybrid CH&P PON-11-507 Page 1 of 19 GRANT SOLICITATION CALIFORNIA ENERGY COMMISSION PON-11 and Power (DG/CHP/CCHP) Systems Research, Development and Demonstration PIER Renewable Energy and Advanced Generation APPLICATIONPACKAGE Date: January, 2012 EDMUND G. BROWN JR., Governor #12;Hybrid CH&P PON-11

244

CHP REGIONAL APPLICATION CENTERS: ACTIVITIES AND SELECTED RESULTS  

SciTech Connect

Between 2001 and 2005, the U.S. Department of Energy (DOE) created a set of eight Regional Application Centers (RACs) to facilitate the development and deployment of Combined Heat and Power (CHP) technologies. By utilizing the thermal energy that is normally wasted when electricity is produced at central generating stations, Combined Heat and Power installations can save substantial amounts of energy compared to more traditional technologies. In addition, the location of CHP facilities at or near the point of consumption greatly reduces or eliminates electric transmission and distribution losses. The regional nature of the RACs allows each one to design and provide services that are most relevant to the specific economic and market conditions in its particular geographic area. Between them, the eight RACs provide services to all 50 states and the District of Columbia. Through the end of the federal 2009 fiscal year (FY 2009), the primary focus of the RACs was on providing CHP-related information to targeted markets, encouraging the creation and adoption of public policies and incentives favorable to CHP, and providing CHP users and prospective users with technical assistance and support on specific projects. Beginning with the 2010 fiscal year, the focus of the regional centers broadened to include district energy and waste heat recovery and these entities became formally known as Clean Energy Application Centers, as required by the Energy Independence and Security Act (EISA) of 2007. In 2007, ORNL led a cooperative effort to establish metrics to quantify the RACs accomplishments. That effort began with the development of a detailed logic model describing RAC operations and outcomes, which provided a basis for identifying important activities and accomplishments to track. A data collection spreadsheet soliciting information on those activities for FY 2008 and all previous years of RAC operations was developed and sent to the RACs in the summer of 2008. This represents the first systematic attempt at RAC program measurement in a manner consistent with approaches used for other efforts funded by DOE's Industrial Technologies Program (ITP). In addition, data on CHP installations and associated effects were collected for the same years from a state-by-state database maintained for DOE by ICF international. A report documenting the findings of that study was produced in September, 2009. The purpose of the current report is to present the findings from a new study of RAC activities and accomplishments which examined what the Centers did in FY 2009, the last year in which they concentrated exclusively on CHP technologies. This study focused on identifying and describing RAC activities and was not designed to measure how those efforts influenced CHP installations or other outcomes.

Schweitzer, Martin [ORNL

2010-08-01T23:59:59.000Z

245

Modern Sorters for Soil Segregation on Large Scale Remediation Projects  

Science Conference Proceedings (OSTI)

In the mid-1940's, Dr. C. Lapointe developed a Geiger tube based uranium ore scanner and picker to replace hand-cobbing. In the 1990's, a modern version of the Lapointe Picker for soil sorting was developed around the need to clean the Johnston Atoll of plutonium. It worked well with sand, but these systems are ineffective with soil, especially with wet conditions. Additionally, several other constraints limited throughput. Slow moving belts and thin layers of material on the belt coupled with the use of multiple small detectors and small sorting gates make these systems ineffective for high throughput. Soil sorting of clay-bearing soils and building debris requires a new look at both the material handling equipment, and the radiation detection methodology. A new class of Super-Sorters has attained throughput of one hundred times that of the old designs. Higher throughput means shorter schedules which reduce costs substantially. The planning, cost, implementation, and other site considerations for these new Super-Sorters are discussed. Modern soil segregation was developed by Ed Bramlitt of the Defense Nuclear Agency for clean up at Johnston Atoll. The process eventually became the Segmented Gate System (SGS). This system uses an array of small sodium iodide (NaI) detectors, each viewing a small volume (segment), that control a gate. The volume in the gate is approximately one kg. This system works well when the material to be processed is sand; however, when the material is wet and sticky (soils with clays) the system has difficulty moving the material through the gates. Super-Sorters are a new class of machine designed to take advantage of high throughput aggregate processing conveyors, large acquisition volumes, and large NaI detectors using gamma spectroscopy. By using commercially available material handling equipment, the system can attain processing rates of up to 400 metric tons/hr with spectrum acquisition approximately every 0.5 sec, so the acquisition volume is 50 kilograms or less. Smaller sorting volumes can be obtained with lower throughput or by re-sorting the diverted material. This equipment can also handle large objects. The use of spectroscopy systems allows several regions of- interest to be set. Super-Sorters can bring waste processing charges down to less than $30/ metric ton on smaller jobs and can save hundreds of dollars per metric ton in disposal charges. The largest effect on the overall project cost occurs during planning and implementation. The overall goal is reduction of the length of the project, which dictates the most efficient soil processing. With all sorting systems the parameters that need to be accounted for are matrix type, soil feed rate, soil pre-processing, site conditions, and regulatory issues. The soil matrix and its ability to flow are extremely crucial to operations. It is also important to consider that as conditions change (i.e., moisture), the flowability of the soil matrix will change. Many soil parameters have to be considered: cohesive strength, internal and wall friction, permeability, and bulk density as a function of consolidating pressure. Clay bearing soils have very low permeability and high cohesive strength which makes them difficult to process, especially when wet. Soil feed speed is dependent on the equipment present and the ability to move the soil in the Super-Sorter processing area. When a Super-Sorter is running at 400 metric tons per hour it is difficult to feed the system. As an example, front-end loaders with large buckets would move approximately 5-10 metric tons of material, and 400 metric tons per hour would require 50-100 bucket-loads per hour to attain. Because the flowability of the soil matrix is important, poor material is often pre-processed before it is added to the feed hopper of the 'survey' conveyor. This pre-processing can consist of a 'grizzly' to remove large objects from the soil matrix, followed screening plant to prepare the soil so that it feeds well. Hydrated lime can be added to improve material properties. Site conditions (site

Shonka, J.J.; Kelley, J.E.; O'Brien, J.M. [Shonka Research Associates, Inc., 4939 Lower Roswell Road, Suite 106, Marietta, Georgia 3006 (United States)

2008-01-15T23:59:59.000Z

246

Energy storage technology-environmental implications of large scale utilization  

SciTech Connect

Environmental impacts for several energy storage technologies have been identified. State-of-the-art control technology options were similarly identified. Recommendations for research and development on new control technology were made where present controls were either deemed inadequate or non-existent. Specifically, the energy storage technologies under study included: advanced lead-acid battery, compressed air, underground pumped hydroelectric, flywheel, superconducting magnet and various thermal systems (sensible, latent heat and reversible chemical reaction). In addition, a preliminary study was conducted on fuel cell technology. Although not strictly classified as an energy storage system, fuel cells in conjunction with product recycling units can serve an energy storage function. A very large number of potential environmental impacts can be identified for all of these technologies. However, not all are of primary importance. Detailed discussions of a number of environmental impacts from the latest LASL study as they relate to primarily operational situations are emphasized. In addition, a brief discussion on new application for energy storage technologies and the additional costs of controls to be used for mitigation of specific impacts are also presented.

Krupka, M.C.; Moore, J.E.; Keller, W.E.; Baca, G.A.; Brasier, R.I.; Bennett, W.S.

1979-01-01T23:59:59.000Z

247

Energy Department Awards $66.7 Million for Large-Scale Carbon Sequestration  

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

66.7 Million for Large-Scale Carbon 66.7 Million for Large-Scale Carbon Sequestration Project Energy Department Awards $66.7 Million for Large-Scale Carbon Sequestration Project December 18, 2007 - 4:58pm Addthis Regional Partner to Demonstrate Safe and Permanent Storage of One Million Tons of CO2 at Illinois Site WASHINGTON, DC - Following closely on the heels of three recent awards through the Department of Energy's (DOE) Regional Carbon Sequestration Partnership Program, DOE today awarded $66.7 million to the Midwest Geological Sequestration Consortium (MGSC) for the Department's fourth large-scale carbon sequestration project. The Partnership led by the Illinois State Geological Survey will conduct large volume tests in the Illinois Basin to demonstrate the ability of a geologic formation to

248

DOE Awards $126.6 Million for Two More Large-Scale Carbon Sequestration  

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

$126.6 Million for Two More Large-Scale Carbon $126.6 Million for Two More Large-Scale Carbon Sequestration Projects DOE Awards $126.6 Million for Two More Large-Scale Carbon Sequestration Projects May 6, 2008 - 11:30am Addthis Projects in California and Ohio Join Four Others in Effort to Drastically Reduce Greenhouse Gas Emissions WASHINGTON, DC - The U.S. Department of Energy (DOE) today announced awards of more than $126.6 million to the West Coast Regional Carbon Sequestration Partnership (WESTCARB) and the Midwest Regional Carbon Sequestration Partnership (MRCSP) for the Department's fifth and sixth large-scale carbon sequestration projects. These industry partnerships, which are part of DOE's Regional Carbon Sequestration Partnership, will conduct large volume tests in California and Ohio to demonstrate the ability of a geologic

249

First U.S. Large-Scale CO2 Storage Project Advances | Department of Energy  

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

First U.S. Large-Scale CO2 Storage Project Advances First U.S. Large-Scale CO2 Storage Project Advances First U.S. Large-Scale CO2 Storage Project Advances April 6, 2009 - 1:00pm Addthis Washington, DC - Drilling nears completion for the first large-scale carbon dioxide (CO2) injection well in the United States for CO2 sequestration. This project will be used to demonstrate that CO2 emitted from industrial sources - such as coal-fired power plants - can be stored in deep geologic formations to mitigate large quantities of greenhouse gas emissions. The Archer Daniels Midland Company (ADM) hosted an event April 6 for a CO2 injection test at their Decatur, Ill. ethanol facility. The injection well is being drilled into the Mount Simon Sandstone to a depth more than a mile beneath the surface. This is the first drilling into the sandstone geology

250

Method for large-scale fabrication of atomic-scale structures on material surfaces using surface vacancies  

DOE Patents (OSTI)

A method for forming atomic-scale structures on a surface of a substrate on a large-scale includes creating a predetermined amount of surface vacancies on the surface of the substrate by removing an amount of atoms on the surface of the material corresponding to the predetermined amount of the surface vacancies. Once the surface vacancies have been created, atoms of a desired structure material are deposited on the surface of the substrate to enable the surface vacancies and the atoms of the structure material to interact. The interaction causes the atoms of the structure material to form the atomic-scale structures.

Lim, Chong Wee (Urbana, IL); Ohmori, Kenji (Urbana, IL); Petrov, Ivan Georgiev (Champaign, IL); Greene, Joseph E. (Champaign, IL)

2004-07-13T23:59:59.000Z

251

The role of large-scale, extratropical dynamics in climate change  

SciTech Connect

The climate modeling community has focused recently on improving our understanding of certain processes, such as cloud feedbacks and ocean circulation, that are deemed critical to climate-change prediction. Although attention to such processes is warranted, emphasis on these areas has diminished a general appreciation of the role played by the large-scale dynamics of the extratropical atmosphere. Lack of interest in extratropical dynamics may reflect the assumption that these dynamical processes are a non-problem as far as climate modeling is concerned, since general circulation models (GCMs) calculate motions on this scale from first principles. Nevertheless, serious shortcomings in our ability to understand and simulate large-scale dynamics exist. Partly due to a paucity of standard GCM diagnostic calculations of large-scale motions and their transports of heat, momentum, potential vorticity, and moisture, a comprehensive understanding of the role of large-scale dynamics in GCM climate simulations has not been developed. Uncertainties remain in our understanding and simulation of large-scale extratropical dynamics and their interaction with other climatic processes, such as cloud feedbacks, large-scale ocean circulation, moist convection, air-sea interaction and land-surface processes. To address some of these issues, the 17th Stanstead Seminar was convened at Bishop`s University in Lennoxville, Quebec. The purpose of the Seminar was to promote discussion of the role of large-scale extratropical dynamics in global climate change. Abstracts of the talks are included in this volume. On the basis of these talks, several key issues emerged concerning large-scale extratropical dynamics and their climatic role. Individual records are indexed separately for the database.

Shepherd, T.G. [ed.

1994-02-01T23:59:59.000Z

252

Strong effect of weak diffusion on scalar turbulence at large scales  

E-Print Network (OSTI)

Passive scalar turbulence forced steadily is characterized by the velocity correlation scale, $L$, injection scale, $l$, and diffusive scale, $r_d$. The scales are well separated if the diffusivity is small, $r_d\\ll l,L$, and one normally says that effects of diffusion are confined to smaller scales, $r\\ll r_d$. However, if the velocity is single scale one finds that a weak dependence of the scalar correlations on the molecular diffusivity persists to even larger scales, e.g. $l\\gg r\\gg r_d$ \\cite{95BCKL}. We consider the case of $L\\gg l$ and report a counter-intuitive result -- the emergence of a new range of large scales, $L\\gg r\\gg l^2/r_d$, where the diffusivity shows a strong effect on scalar correlations.

M. Chertkov; I. Kolokolov; V. Lebedev

2007-06-20T23:59:59.000Z

253

Approaches to large scale unsaturated flow in heterogeneous, stratified, and fractured geologic media  

Science Conference Proceedings (OSTI)

This report develops a broad review and assessment of quantitative modeling approaches and data requirements for large-scale subsurface flow in radioactive waste geologic repository. The data review includes discussions of controlled field experiments, existing contamination sites, and site-specific hydrogeologic conditions at Yucca Mountain. Local-scale constitutive models for the unsaturated hydrodynamic properties of geologic media are analyzed, with particular emphasis on the effect of structural characteristics of the medium. The report further reviews and analyzes large-scale hydrogeologic spatial variability from aquifer data, unsaturated soil data, and fracture network data gathered from the literature. Finally, various modeling strategies toward large-scale flow simulations are assessed, including direct high-resolution simulation, and coarse-scale simulation based on auxiliary hydrodynamic models such as single equivalent continuum and dual-porosity continuum. The roles of anisotropy, fracturing, and broad-band spatial variability are emphasized. 252 refs.

Ababou, R.

1991-08-01T23:59:59.000Z

254

Observed Large-Scale Structures and Diabatic Heating and Drying Profiles during TWP-ICE  

Science Conference Proceedings (OSTI)

This study documents the characteristics of the large-scale structures and diabatic heating and drying profiles observed during the Tropical Warm Pool–International Cloud Experiment (TWP-ICE), which was conducted in January–February 2006 in ...

Shaocheng Xie; Timothy Hume; Christian Jakob; Stephen A. Klein; Renata B. McCoy; Minghua Zhang

2010-01-01T23:59:59.000Z

255

Horizontal Structure and Seasonality of Large-Scale Circulations Associated with Submonthly Tropical Convection  

Science Conference Proceedings (OSTI)

The relationship between deep tropical convection and large-scale atmospheric circulation in the 6–30-day period range is examined. Regression relationships between filtered outgoing longwave radiation at various locations in the Tropics and 200- ...

George N. Kiladis; Klaus M. Weickmann

1997-09-01T23:59:59.000Z

256

Conjugate-Gradient Methods for Large-Scale Minimization in Meteorology  

Science Conference Proceedings (OSTI)

During the last few years new meteorological variational analysis methods have evolved, requiring large-scale minimization of a nonlinear objective function described in terms of discrete variables. The conjugate-gradient method was found to ...

I. M. Navon; David M. Legler

1987-08-01T23:59:59.000Z

257

How Well Do Large-Scale Models Reproduce Regional Hydrological Extremes in Europe?  

Science Conference Proceedings (OSTI)

This paper presents a new methodology for assessing the ability of gridded hydrological models to reproduce large-scale hydrological high and low flow events (as a proxy for hydrological extremes) as described by catalogues of historical droughts [...

Christel Prudhomme; Simon Parry; Jamie Hannaford; Douglas B. Clark; Stefan Hagemann; Frank Voss

2011-12-01T23:59:59.000Z

258

DOE's Office of Science Seeks Proposals for Expanded Large-Scale Scientific  

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

Seeks Proposals for Expanded Large-Scale Seeks Proposals for Expanded Large-Scale Scientific Computing DOE's Office of Science Seeks Proposals for Expanded Large-Scale Scientific Computing May 16, 2005 - 12:47pm Addthis WASHINGTON, D.C. -- Secretary of Energy Samuel W. Bodman announced today that DOE's Office of Science is seeking proposals to support innovative, large-scale computational science projects to enable high-impact advances through the use of advanced computers not commonly available in academia or the private sector. Projects currently funded are helping to reduce engine pollution and to improve our understanding of the stars and solar systems and human genetics. Successful proposers will be given the use of substantial computer time and data storage at the department's scientific

259

DOE's Office of Science Seeks Proposals for Expanded Large-Scale Scientific  

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

DOE's Office of Science Seeks Proposals for Expanded Large-Scale DOE's Office of Science Seeks Proposals for Expanded Large-Scale Scientific Computing DOE's Office of Science Seeks Proposals for Expanded Large-Scale Scientific Computing May 16, 2005 - 12:47pm Addthis WASHINGTON, D.C. -- Secretary of Energy Samuel W. Bodman announced today that DOE's Office of Science is seeking proposals to support innovative, large-scale computational science projects to enable high-impact advances through the use of advanced computers not commonly available in academia or the private sector. Projects currently funded are helping to reduce engine pollution and to improve our understanding of the stars and solar systems and human genetics. Successful proposers will be given the use of substantial computer time and data storage at the department's scientific

260

Large-Scale Residential Energy Efficiency Programs Based on CFLs | Open  

Open Energy Info (EERE)

Large-Scale Residential Energy Efficiency Programs Based on CFLs Large-Scale Residential Energy Efficiency Programs Based on CFLs Jump to: navigation, search Tool Summary Name: Large-Scale Residential Energy Efficiency Programs Based on CFLs Agency/Company /Organization: Energy Sector Management Assistance Program of the World Bank Sector: Energy Focus Area: Energy Efficiency, Buildings Topics: Implementation, Policies/deployment programs Website: www.esmap.org/filez/pubs/216201021421_CFL_Toolkit_Web_Version_021610_R References: Large-Scale Residential Energy Efficiency Programs Based on CFLs[1] Overview "The World Bank Group and its Energy Sector Management Assitance Progamme (ESMAP) have produced a toolkit for efficient lighting programmes, based on compact fluorescent lamps, that compiles and shares operational (design,

Note: This page contains sample records for the topic "large scale chp" 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

ARM - PI Product - Large Scale Ice Water Path and 3-D Ice Water Content  

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

ProductsLarge Scale Ice Water Path and 3-D Ice Water ProductsLarge Scale Ice Water Path and 3-D Ice Water Content Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send PI Product : Large Scale Ice Water Path and 3-D Ice Water Content Site(s) SGP TWP General Description Cloud ice water concentration is one of the most important, yet poorly observed, cloud properties. Developing physical parameterizations used in general circulation models through single-column modeling is one of the key foci of the ARM program. In addition to the vertical profiles of temperature, water vapor and condensed water at the model grids, large-scale horizontal advective tendencies of these variables are also required as forcing terms in the single-column models. Observed horizontal advection of condensed water has not been available because the

262

The Nonlinear Response of the Atmosphere to Large-Scale Mechanical and Thermal Forcing  

Science Conference Proceedings (OSTI)

The subject of large-scale mountain waves is reviewed briefly. Existing mountain wave theory based on a linear system is shown to give an inadequate description of the balance of angular momentum. The response of the atmosphere to mechanical ...

Guo-Xiong Wu

1984-08-01T23:59:59.000Z

263

On-demand computation of policy based routes for large-scale network simulation  

Science Conference Proceedings (OSTI)

Routing table storage demands pose a significant obstacle for large-scale network simulation. On-demand computation of routes can alleviate those problems for models that do not require representation of routing dynamics. However, policy based routes, ...

Michael Liljenstam; David M. Nicol

2004-12-01T23:59:59.000Z

264

Impact of Large Scale Energy Efficiency Programs On Consumer Tariffs and Utility Finances in India  

E-Print Network (OSTI)

and are added to the utility’s rate base. Large-scale EE2009a, 2009b, 2009c). utility’s rate base, and the utilityto the grid at a higher rate if the utility does not face

Abhyankar, Nikit

2011-01-01T23:59:59.000Z

265

Sensitivity of Tropical Convection to Sea Surface Temperature in the Absence of Large-Scale Flow  

Science Conference Proceedings (OSTI)

The response of convection to changing sea surface temperature (SST) in the absence of large-scale flow is examined, using a three-dimensional cloud resolving model. The model includes a five-category bulk microphysical scheme representing snow, ...

Adrian M. Tompkins; George C. Craig

1999-02-01T23:59:59.000Z

266

Potential Climatic Impacts and Reliability of Very Large-Scale Wind Farms  

E-Print Network (OSTI)

Meeting future world energy needs while addressing climate change requires large-scale deployment of low or zero greenhouse gas (GHG) emission technologies such as wind energy. The widespread availability of wind power has ...

Wang, Chien

267

A case study in meta-simulation design and performance analysis for large-scale networks  

Science Conference Proceedings (OSTI)

Simulation and emulation techniques are fundamental to aid the process of large-scale protocol design and network operations. However, the results from these techniques are often view with a great deal of skepticism from the networking community. Criticisms ...

David Bauer; Garrett Yaun; Christopher D. Carothers; Murat Yuksel; Shivkumar Kalyanaraman

2004-12-01T23:59:59.000Z

268

Tropical Instability Wave Variability in the Pacific and Its Relation to Large-Scale Currents  

Science Conference Proceedings (OSTI)

Shipboard acoustic Doppler current profiler (ADCP)-derived zonal currents from 170° to 110°W are assembled into composite seasonal and ENSO cycles to produce detailed representations of large-scale ocean flow regimes that favor tropical ...

Eric S. Johnson; Jeffrey A. Proehl

2004-10-01T23:59:59.000Z

269

On the Completeness of Multi-Variate Optimum Interpolation for Large-Scale Meteorological Analysis  

Science Conference Proceedings (OSTI)

The Baer-Tribbia nonlinear modal initialization method implies that large-scale meteorological analyses should focus on analysis of slow mode fields. An idealized multi-variate optimum interpolation analysis is shown to produce grid point results ...

Norman A. Phillips

1982-10-01T23:59:59.000Z

270

A Hybrid Kalman Filter Algorithm for Large-Scale Atmospheric Chemistry Data Assimilation  

Science Conference Proceedings (OSTI)

In the past, a number of algorithms have been introduced to solve data assimilation problems for large-scale applications. Here, several Kalman filters, coupled to the European Operational Smog (EUROS) atmospheric chemistry transport model, are ...

R. G. Hanea; G. J. M. Velders; A. J. Segers; M. Verlaan; A. W. Heemink

2007-01-01T23:59:59.000Z

271

Energy Transmission by Barotropic Rossby Waves across Large-Scale Topography  

Science Conference Proceedings (OSTI)

An analytical study investigates the energy transmission by free, barotropic, linear Rossby waves across a large scale bottom topography when topographic and beta-effects have the same order of magnitude. In open ocean regions which are not ...

Bernard Barnier

1984-02-01T23:59:59.000Z

272

Large-Scale Environmental Parameters Associated with Tropical Cyclone Formations in the Western North Pacific  

Science Conference Proceedings (OSTI)

The local environmental conditions associated with 405 tropical cyclone (TC) formations in the western North Pacific during 1990–2001 are examined in this study. Six large-scale parameters are obtained and computed from the NCEP reanalyses with ...

Kevin K. W. Cheung

2004-02-01T23:59:59.000Z

273

Aerosols in Amazonia: Natural biogenic particles and large scale biomass burning impacts  

Science Conference Proceedings (OSTI)

The Large Scale Biosphere Atmosphere Experiment in Amazonia (LBA) is a long term (20 years) research effort aimed at the understanding of the functioning of the Amazonian ecosystem. In particular

2013-01-01T23:59:59.000Z

274

On the Identification of the Large-Scale Properties of Tropical Convection using Cloud Regimes  

Science Conference Proceedings (OSTI)

The use of cloud regimes in identifying tropical convection and the associated large-scale atmospheric properties is investigated. The regimes are derived by applying cluster analysis to satellite retrievals of daytime-averaged frequency ...

Jackson Tan; Christian Jakob; Todd P. Lane

275

National large-scale Urban True Orthophoto Mapping and its standard initiative  

Science Conference Proceedings (OSTI)

This document would highlight the current project activities, published or unpublished research contributions, success and challenges from March 2005 through December 2005 and plane for the coming years on the project, entitled "National Large-Scale ...

Guoqing Zhou; Wenhan Xie; Susan Benjamin; Robin G. Fegeas; John Simmers; Hap Cluff; Y. Lei; Jeanne Foust

2006-05-01T23:59:59.000Z

276

A Parallel Euler Approach for Large-Scale Biological Sequence Assembly  

Science Conference Proceedings (OSTI)

Biological sequence assembly is an essential step for sequencing the genomes of organisms. Sequence assembly is very computing intensive especially for the large-scale sequence assembly. Parallel computing is an effective way to reduce the computing ...

2005-07-01T23:59:59.000Z

277

Large Scale Soft X-ray Loops And Their Magnetic Chirality In Both Hemispheres  

E-Print Network (OSTI)

The magnetic chirality in solar atmosphere has been studied based on the soft X-ray and magnetic field observations. It is found that some of large-scale twisted soft X-ray loop systems occur for several months in the solar atmosphere, before the disappearance of the corresponding background large-scale magnetic field. It provides the observational evidence of the helicity of the large-scale magnetic field in the solar atmosphere and the reverse one relative to the helicity rule in both hemispheres with solar cycles. The transfer of the magnetic helicity from the subatmosphere is consistent with the formation of large-scale twisted soft X-ray loops in the both solar hemispheres.

Zhang, Hongqi; Gao, Yu; Su, Jiangtao; Sokoloff, D D; Kuzanyan, K

2010-01-01T23:59:59.000Z

278

Impact of Large Scale Energy Efficiency Programs On Consumer Tariffs and Utility Finances in India  

E-Print Network (OSTI)

as sources of low-cost baseload power. 4.6.3 Large­Scale EE b is the variable cost of baseload power purchases, and L isbut simply avoids baseload power purchases. Utilities that

Abhyankar, Nikit

2011-01-01T23:59:59.000Z

279

Summertime Precipitation Variability over South America: Role of the Large-Scale Circulation  

Science Conference Proceedings (OSTI)

The observed large-scale circulation mechanisms associated with summertime precipitation variability over South America are investigated. Particular attention is paid to the Altiplano where a close relationship has been observed between rainfall ...

J. D. Lenters; K. H. Cook

1999-03-01T23:59:59.000Z

280

Sensitivity Study of Regional Climate Model Simulations to Large-Scale Nudging Parameters  

Science Conference Proceedings (OSTI)

Previous studies with nested regional climate models (RCMs) have shown that large-scale spectral nudging (SN) seems to be a powerful method to correct RCMs’ weaknesses such as internal variability, intermittent divergence in phase space (IDPS), ...

Adelina Alexandru; Ramon de Elia; René Laprise; Leo Separovic; Sébastien Biner

2009-05-01T23:59:59.000Z

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


281

Interannual Variability of Tropical Cyclones in the Australian Region: Role of Large-Scale Environment  

Science Conference Proceedings (OSTI)

This study investigates the role of large-scale environmental factors, notably sea surface temperature (SST), low-level relative vorticity, and deep-tropospheric vertical wind shear, in the interannual variability of November–April tropical ...

Hamish A. Ramsay; Lance M. Leslie; Peter J. Lamb; Michael B. Richman; Mark Leplastrier

2008-03-01T23:59:59.000Z

282

In-situ sampling of a large-scale particle simulation for interactive visualization and analysis  

Science Conference Proceedings (OSTI)

We describe a simulation-time random sampling of a large-scale particle simulation, the RoadRunner Universe MC3 cosmological simulation, for interactive post-analysis and visualization. Simulation data generation rates will continue to be ...

J. Woodring; J. Ahrens; J. Figg; J. Wendelberger; S. Habib; K. Heitmann

2011-06-01T23:59:59.000Z

283

LARGE SCALE PERMEABILITY TEST OF THE GRANITE IN THE STRIPA MINE AND THERMAL CONDUCTIVITY TEST  

E-Print Network (OSTI)

No.2 LARGE SCALE PERMEABILITY TEST OF THE GRANITE' IN THEMINE AND, THERMAL CONDUCTIVITY TEST Lars Lundstrom and HakanSUMMARY REPORT Background TEST SITE Layout of test places

Lundstrom, L.

2011-01-01T23:59:59.000Z

284

Anisotropic mesoscopic traffic simulation approach to support large-scale traffic and logistic modeling and analysis  

Science Conference Proceedings (OSTI)

Large-scale traffic and transportation logistics analysis requires a realistic depiction of network traffic condition in a dynamic manner. In the past decades, vehicular traffic simulation approaches have been increasingly developed and applied to describe ...

Ye Tian; Yi-Chang Chiu

2011-12-01T23:59:59.000Z

285

The Dynamics of Large-Scale Cyclogenesis over the North Pacific Ocean  

Science Conference Proceedings (OSTI)

Earlier studies of persistent large-scale flow anomalies have been extended, with the aim of identifying the primary mechanisms for persistent anomaly development. In this study the focus is on wintertime cases of persistent cyclonic flow ...

Robert X. Black; Randall M. Dole

1993-02-01T23:59:59.000Z

286

Model-constrained optimization methods for reduction of parameterized large-scale systems  

E-Print Network (OSTI)

Most model reduction techniques employ a projection framework that utilizes a reduced-space basis. The basis is usually formed as the span of a set of solutions of the large-scale system, which are computed for selected ...

Bui-Thanh, Tan

2007-01-01T23:59:59.000Z

287

On the Ocean’s Large-Scale Circulation near the Limit of No Vertical Mixing  

Science Conference Proceedings (OSTI)

By convention, the ocean’s large-scale circulation is assumed to be a thermohaline overturning driven by the addition and extraction of buoyancy at the surface and vertical mixing in the interior. Previous work suggests that the overturning ...

J. R. Toggweiler; B. Samuels

1998-09-01T23:59:59.000Z

288

Some Correlations between the Large-Scale Meridional Eddy Momentum Transport and Zonal Mean Quantities  

Science Conference Proceedings (OSTI)

An empirical study has been made which compares the large-scale meridional eddy momentum transport with some selected zonal mean quantities by calculating correlations between them as a function of time lag and latitude. The basic dataset was the ...

Anne Leach

1984-01-01T23:59:59.000Z

289

Influence of Forced Large-Scale Atmospheric Patterns on Surface Air Temperature in China  

Science Conference Proceedings (OSTI)

The seasonality of the influence of the tropical Pacific sea surface temperature (SST)-forced large-scale atmospheric patterns on the surface air temperature (SAT) over China is investigated for the period from 1969 to 2001. Both observations and ...

Xiaojing Jia; Hai Lin

2011-03-01T23:59:59.000Z

290

Explosive Cyclogenesis and Large-Scale Circulation Changes: Implications for Atmospheric Blocking  

Science Conference Proceedings (OSTI)

Large-scale circulation changes attending explosive surface cyclogenesis are quantitatively examined in two cases selected from recent winter seasons. Both cases feature a rapidly deepening surface cyclone over the western Atlantic Ocean, but ...

Stephen J. Colucci

1985-12-01T23:59:59.000Z

291

Tropical Cyclone Track Characteristics as a Function of Large-Scale Circulation Anomalies  

Science Conference Proceedings (OSTI)

Factors that contribute to intraseasonal variability in western North Pacific tropical cyclone track types are investigated. It is hypothesized that the 700-mb large-scale circulation can affect tropical cyclone track characteristics by enhancing ...

Patrick A. Harr; Russell L. Elsberry

1991-06-01T23:59:59.000Z

292

Agent Based Dynamic Service Synthesis in Large-Scale Open Environments: Experiences from the Agentcities Testbed  

Science Conference Proceedings (OSTI)

The notion of autonomous agents populating large-scale open environments, such as the public Internet, that are able to dynamically discover one another, interact and synthesise new software applications or results has become one of the key technology ...

Steven Willmott; Simon Thompson; David Bonnefoy; Patricia Charlton; Ion Constantinescu; Jonathan Dale; Tianning Zhang

2004-07-01T23:59:59.000Z

293

Large-Scale Heat and Moisture Budgets over the ASTEX Region  

Science Conference Proceedings (OSTI)

Rawinsonde data collected from the Atlantic Stratocumulus Transition Experiment (ASTEX) were used to investigate the mean and temporal characteristics of large-scale heat and moisture budgets for a 2-week period in June 1992. During this period a ...

Paul E. Ciesielski; Wayne H. Schubert; Richard H. Johnson

1999-09-01T23:59:59.000Z

294

Dependence of Large-Scale Precipitation Climatologies on Temporal and Spatial Sampling  

Science Conference Proceedings (OSTI)

Large-scale observed precipitation climatologies are needed for a variety of purposes in the fields of climate and environmental modeling. Although new satellite-derived precipitation estimates offer the prospect of near-global climatologies ...

Mike Hulme; Mark New

1997-05-01T23:59:59.000Z

295

Aerosol-Induced Large-Scale Variability in Precipitation over the Tropical Atlantic  

Science Conference Proceedings (OSTI)

Multiyear satellite observations are used to document a relationship between the large-scale variability in precipitation over the tropical Atlantic and aerosol traced to African sources. During boreal winter and spring there is a significant ...

Jingfeng Huang; Chidong Zhang; Joseph M. Prospero

2009-10-01T23:59:59.000Z

296

An Idealized Prototype for Large-Scale Land–Atmosphere Coupling  

Science Conference Proceedings (OSTI)

A process-based, semianalytic prototype model for understanding large-scale land–atmosphere coupling is developed here. The metric for quantifying the coupling is the sensitivity of precipitation P to soil moisture W, . For a range of prototype ...

Benjamin R. Lintner; Pierre Gentine; Kirsten L. Findell; Fabio D’Andrea; Adam H. Sobel; Guido D. Salvucci

2013-04-01T23:59:59.000Z

297

Built-in data-flow integration testing in large-scale component-based systems  

Science Conference Proceedings (OSTI)

Modern large-scale component-based applications and service ecosystems are built following a number of different component models and architectural styles, such as the data-flow architectural style. In this style, each building block receives data from ...

Éric Piel; Alberto Gonzalez-Sanchez; Hans-Gerhard Gross

2010-11-01T23:59:59.000Z

298

Large-Scale Vertical Eddy Diffusion in the Main Pycnocline of the Central North Pacific  

Science Conference Proceedings (OSTI)

Indirect procedures are used to estimate the latitudinal distribution of the large-scale vertical eddy diffusivity coefficient in the main pycnocline from the interannual change in T?, ?? structure of the water column in the central midlatitude ...

Warren White; Robert Bernstein

1981-04-01T23:59:59.000Z

299

Nuclear EMP simulation for large-scale urban environments. FDTD for electrically large problems.  

SciTech Connect

In case of a terrorist nuclear attack in a metropolitan area, EMP measurement could provide: (1) a prompt confirmation of the nature of the explosion (chemical or nuclear) for emergency response; and (2) and characterization parameters of the device (reaction history, yield) for technical forensics. However, urban environment could affect the fidelity of the prompt EMP measurement (as well as all other types of prompt measurement): (1) Nuclear EMP wavefront would no longer be coherent, due to incoherent production, attenuation, and propagation of gamma and electrons; and (2) EMP propagation from source region outward would undergo complicated transmission, reflection, and diffraction processes. EMP simulation for electrically-large urban environment: (1) Coupled MCNP/FDTD (Finite-difference time domain Maxwell solver) approach; and (2) FDTD tends to be limited to problems that are not 'too' large compared to the wavelengths of interest because of numerical dispersion and anisotropy. We use a higher-order low-dispersion, isotropic FDTD algorithm for EMP propagation.

Smith, William S. [Los Alamos National Laboratory; Bull, Jeffrey S. [Los Alamos National Laboratory; Wilcox, Trevor [Los Alamos National Laboratory; Bos, Randall J. [Los Alamos National Laboratory; Shao, Xuan-Min [Los Alamos National Laboratory; Goorley, John T. [Los Alamos National Laboratory; Costigan, Keeley R. [Los Alamos National Laboratory

2012-08-13T23:59:59.000Z

300

Design of large-scale agricultural wireless sensor networks: email from the vineyard  

Science Conference Proceedings (OSTI)

We describe the design and implementation of a large-scale Wireless Sensor Network (WSN) for agriculture monitoring. As a part of validation we have deployed a prototype of 64 sensors to monitor a commercial vineyard. The system provides ... Keywords: WSN testbed, agricultural WSNs, agriculture monitoring, commercial vineyards, data collection, data storage, geographical coverage, large-scale WSNs, spatial resolution, vineyeard monitoring, wireless networks, wireless sensor networks

Christine Jardak; Krisakorn Rerkrai; Aleksandar Kovacevic; Janne Riihijarvi; Petri Mahonen

2010-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "large scale chp" 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

LogGOPSim: simulating large-scale applications in the LogGOPS model  

Science Conference Proceedings (OSTI)

We introduce LogGOPSim---a fast simulation framework for parallel algorithms at large-scale. LogGOPSim utilizes a slightly extended version of the well-known LogGPS model in combination with full MPI message matching semantics and detailed simulation ... Keywords: LogGOPS model, LogGP, LogGPS, LogP, collective operations, large-scale performance, message passing interface, simulation

Torsten Hoefler; Timo Schneider; Andrew Lumsdaine

2010-06-01T23:59:59.000Z

302

Structuring of Large-scale Complex Hybrid Systems: from Illustrative Analysis toward Modelization  

Science Conference Proceedings (OSTI)

System structuring is paramount to the development of large-scale complex hybrid systems (LCHS). However, there is no well-established and effective methodology for the structuring of LCHS. Using the approach of illustrating and abstracting, this paper ... Keywords: autonomous system, block-diagram-based model, distributed system, hierarchical system, large-scale complex hybrid system (LCHS), multiple gradation, nested system, nesting, perception–decision link, system geometry, system modelization, system structuring

Huaglory Tianfield

2001-02-01T23:59:59.000Z

303

Large-scale byzantine fault tolerance: safe but not always live  

Science Conference Proceedings (OSTI)

The overall correctness of large-scale systems composed of many groups of replicas executing BFT protocols scales poorly with the number of groups. This is because the probability of at least one group being compromised (more than 1/3 faulty replicas) ...

Rodrigo Rodrigues; Petr Kouznetsov; Bobby Bhattacharjee

2007-06-01T23:59:59.000Z

304

Large-Eddy Simulations of Radiatively Driven Convection: Sensitivities to the Representation of Small Scales  

Science Conference Proceedings (OSTI)

Large-eddy simulations of a smoke cloud are examined with respect to their sensitivity to small scales as manifest in either the grid spacing or the subgrid-scale (SGS) model. Calculations based on a Smagorinsky SGS model are found to be more ...

Bjorn Stevens; Chin-Hoh Moeng; Peter P. Sullivan

1999-12-01T23:59:59.000Z

305

Performance modeling of hybrid MPI/OpenMP scientific applications on large-scale multicore supercomputers  

Science Conference Proceedings (OSTI)

In this paper, we present a performance modeling framework based on memory bandwidth contention time and a parameterized communication model to predict the performance of OpenMP, MPI and hybrid applications with weak scaling on three large-scale multicore ... Keywords: Hybrid MPI/OpenMP, Memory bandwidth contention time, Multicore supercomputers, Performance modeling

Xingfu Wu, Valerie Taylor

2013-12-01T23:59:59.000Z

306

Large-Scale Software Unit Testing on the Grid Yaohang Li, 2  

E-Print Network (OSTI)

-scale and cost-efficient computational grid resources as a software testing test bed to support automated. Grid computing is characterized by large-scale sharing and cooperation of dynamically distributed a grid-based software testing framework to facilitate the automated process of utilizing the grid

Li, Yaohang

307

Variability of Load and Net Load in Case of Large Scale Distributed Wind Power  

Science Conference Proceedings (OSTI)

Large scale wind power production and its variability is one of the major inputs to wind integration studies. This paper analyses measured data from large scale wind power production. Comparisons of variability are made across several variables: time scale (10-60 minute ramp rates), number of wind farms, and simulated vs. modeled data. Ramp rates for Wind power production, Load (total system load) and Net load (load minus wind power production) demonstrate how wind power increases the net load variability. Wind power will also change the timing of daily ramps.

Holttinen, H.; Kiviluoma, J.; Estanqueiro, A.; Gomez-Lazaro, E.; Rawn, B.; Dobschinski, J.; Meibom, P.; Lannoye, E.; Aigner, T.; Wan, Y. H.; Milligan, M.

2011-01-01T23:59:59.000Z

308

Hierarchical visibility for guaranteed search in large-scale outdoor terrain  

Science Conference Proceedings (OSTI)

Searching for moving targets in large environments is a challenging task that is relevant in several problem domains, such as capturing an invader in a camp, guarding security facilities, and searching for victims in large-scale search and rescue scenarios. ... Keywords: Exploration, Guaranteed search, HRI, Human---robot-interaction, Moving target search, Path planning, Pursuit-evasion, Task allocation

A. Kleiner; A. Kolling; M. Lewis; K. Sycara

2013-01-01T23:59:59.000Z

309

Determining the Mean, Large-Scale Circulation of the Atlantic with the Adjoint Method  

Science Conference Proceedings (OSTI)

A new model approach based on the adjoint formalism and aimed at assimilating large sets of hydrographic data is presented. The goal of the model calculations is to obtain the mean, large-scale ocean circulation together with coefficients of iso- ...

Reiner Schlitzer

1993-09-01T23:59:59.000Z

310

DRAM errors in the wild: a large-scale field study  

Science Conference Proceedings (OSTI)

Errors in dynamic random access memory (DRAM) are a common form of hardware failure in modern compute clusters. Failures are costly both in terms of hardware replacement costs and service disruption. While a large body of work exists on DRAM in laboratory ... Keywords: data corruption, dimm, dram, dram reliability, ecc, empirical study, hard error, large-scale systems, memory, soft error

Bianca Schroeder; Eduardo Pinheiro; Wolf-Dietrich Weber

2009-06-01T23:59:59.000Z

311

An assessment of accountability policies for large-scale distributed computing systems  

Science Conference Proceedings (OSTI)

Grid computing systems offer resources to solve large-scale computational problems and are thus widely used in a large variety of domains, including computational sciences, energy management, and defense. Accountability in these application domains is ... Keywords: accountability, distributed systems, grid, policies, scalability

Wonjun Lee; Anna C. Squicciarini; Elisa Bertino

2009-04-01T23:59:59.000Z

312

TOPOLOGY OF A LARGE-SCALE STRUCTURE AS A TEST OF MODIFIED GRAVITY  

SciTech Connect

The genus of the isodensity contours is a robust measure of the topology of a large-scale structure, and it is relatively insensitive to nonlinear gravitational evolution, galaxy bias, and redshift-space distortion. We show that the growth of density fluctuations is scale dependent even in the linear regime in some modified gravity theories, which opens a new possibility of testing the theories observationally. We propose to use the genus of the isodensity contours, an intrinsic measure of the topology of the large-scale structure, as a statistic to be used in such tests. In Einstein's general theory of relativity, density fluctuations grow at the same rate on all scales in the linear regime, and the genus per comoving volume is almost conserved as structures grow homologously, so we expect that the genus-smoothing-scale relation is basically time independent. However, in some modified gravity models where structures grow with different rates on different scales, the genus-smoothing-scale relation should change over time. This can be used to test the gravity models with large-scale structure observations. We study the cases of the f(R) theory, DGP braneworld theory as well as the parameterized post-Friedmann models. We also forecast how the modified gravity models can be constrained with optical/IR or redshifted 21 cm radio surveys in the near future.

Wang Xin; Chen Xuelei [Key Laboratory of Optical Astronomy, National Astronomical ObservatoriesChinese Academy of Sciences, Beijing 100012 (China); Park, Changbom [Korea Institute for Advanced Study, Dongdaemun-gu, Seoul 130-722 (Korea, Republic of)

2012-03-01T23:59:59.000Z

313

Ultra high energy cosmic rays and the large scale structure of the galactic magnetic field  

E-Print Network (OSTI)

We study the deflection of ultra high energy cosmic ray protons in different models of the regular galactic magnetic field. Such particles have gyroradii well in excess of 1 kpc and their propagation in the galaxy reflects only the large scale structure of the galactic magnetic field. A future large experimental statistics of cosmic rays of energy above 10$^{19}$ eV could be used for a study of the large scale structure of the galactic magnetic field if such cosmic rays are indeed charged nuclei accelerated at powerful astrophysical objects and if the distribution of their sources is not fully isotropic.

Todor Stanev

1996-07-17T23:59:59.000Z

314

Measuring and tuning energy efficiency on large scale high performance computing platforms.  

Science Conference Proceedings (OSTI)

Recognition of the importance of power in the field of High Performance Computing, whether it be as an obstacle, expense or design consideration, has never been greater and more pervasive. While research has been conducted on many related aspects, there is a stark absence of work focused on large scale High Performance Computing. Part of the reason is the lack of measurement capability currently available on small or large platforms. Typically, research is conducted using coarse methods of measurement such as inserting a power meter between the power source and the platform, or fine grained measurements using custom instrumented boards (with obvious limitations in scale). To collect the measurements necessary to analyze real scientific computing applications at large scale, an in-situ measurement capability must exist on a large scale capability class platform. In response to this challenge, we exploit the unique power measurement capabilities of the Cray XT architecture to gain an understanding of power use and the effects of tuning. We apply these capabilities at the operating system level by deterministically halting cores when idle. At the application level, we gain an understanding of the power requirements of a range of important DOE/NNSA production scientific computing applications running at large scale (thousands of nodes), while simultaneously collecting current and voltage measurements on the hosting nodes. We examine the effects of both CPU and network bandwidth tuning and demonstrate energy savings opportunities of up to 39% with little or no impact on run-time performance. Capturing scale effects in our experimental results was key. Our results provide strong evidence that next generation large-scale platforms should not only approach CPU frequency scaling differently, but could also benefit from the capability to tune other platform components, such as the network, to achieve energy efficient performance.

Laros, James H., III

2011-08-01T23:59:59.000Z

315

A Sequential Cooperative Game Theoretic Approach to Storage-Aware Scheduling of Multiple Large-Scale Workflow Applications in Grids  

Science Conference Proceedings (OSTI)

Scheduling large-scale applications in heterogeneous Grid and Cloud systems is a fundamental NP-complete problem for obtaining good performance and execution costs. We address the problem of scheduling an important class of large-scale Grid applications ...

Rubing Duan; Radu Prodan; Xiaorong Li

2012-09-01T23:59:59.000Z

316

Distributed Generation Study/Patterson Farms CHP System Using Renewable  

Open Energy Info (EERE)

Farms CHP System Using Renewable Farms CHP System Using Renewable Biogas < Distributed Generation Study Jump to: navigation, search Study Location Auburn, New York Site Description Agricultural Study Type Field Test Technology Internal Combustion Engine Prime Mover Caterpillar G379 Heat Recovery Systems Built-in Fuel Biogas System Installer Martin Machinery System Enclosure Dedicated Shelter System Application Combined Heat and Power Number of Prime Movers 1 Stand-alone Capability None Power Rating 200 kW0.2 MW 200,000 W 200,000,000 mW 2.0e-4 GW 2.0e-7 TW Nominal Voltage (V) 480 Heat Recovery Rating (BTU/hr) 1366072 Cooling Capacity (Refrig/Tons) Origin of Controller 3rd Party Custom Made Component Integration Customer Assembled Start Date 2007/05/02 Monitoring Termination Date 2007/05/26

317

Solar Power in the Desert: Are the current large-scale solar developments really improving California’s environment?  

E-Print Network (OSTI)

from large-scale solar steam generator systems Persistenceof water as steam power generators. The largest of these

Allen, Michael F.; McHughen, Alan

2011-01-01T23:59:59.000Z

318

Common Effects of Acidic Activators on Large-Scale Chromatin Structure and Transcription  

E-Print Network (OSTI)

Large-scale chromatin decondensation has been observed after the targeting of certain acidic activators to heterochromatic chromatin domains. Acidic activators are often modular, with two or more separable transcriptional activation domains. Whether these smaller regions are sufficient for all functions of the activators has not been demonstrated. We adapted an inducible heterodimerization system to allow systematic dissection of the function of acidic activators, individual subdomains within these activators, and short acidic-hydrophobic peptide motifs within these subdomains. Here, we demonstrate that large-scale chromatin decondensation activity is a general property of acidic activators. Moreover, this activity maps to the same acidic activator subdomains and acidic-hydrophobic peptide motifs that are responsible for transcriptional activation. Two copies of a mutant peptide motif of VP16 (viral protein 16) possess large-scale chromatin decondensation activity but minimal transcriptional activity, and a synthetic acidic-hydrophobic peptide motif had large-scale chromatin decondensation activity comparable to the strongest full-length acidic activator but no transcriptional activity. Therefore, the general property of large-scale chromatin decondensation shared by most acidic activators is not simply a direct result of transcription per se but is most likely the result of the concerted action of coactivator proteins recruited by the activators ’ short acidic-hydrophobic peptide motifs. Several transcriptional activators contain two or more distinct

Anne E. Carpenter; Sevinci Memedula; Matthew J. Plutz; Andrew S. Belmont

2004-01-01T23:59:59.000Z

319

VP 100: New Facility in Boston to Test Large-Scale Wind Blades | Department  

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

VP 100: New Facility in Boston to Test Large-Scale Wind Blades VP 100: New Facility in Boston to Test Large-Scale Wind Blades VP 100: New Facility in Boston to Test Large-Scale Wind Blades July 23, 2010 - 1:19pm Addthis Boston's Wind Technology Testing Center, funded in part with Recovery Act funds, will be first in U.S. to test blades up to 300 feet long. | Photo Courtesy of Massachusetts Clean Energy Center Boston's Wind Technology Testing Center, funded in part with Recovery Act funds, will be first in U.S. to test blades up to 300 feet long. | Photo Courtesy of Massachusetts Clean Energy Center Stephen Graff Former Writer & editor for Energy Empowers, EERE America's first-of-its-kind wind blade testing facility - capable of testing a blade as long as a football field - almost never was. Because of funding woes, the Massachusetts Clean Energy Center (MassCEC),

320

Total Cost Per MwH for all common large scale power generation sources |  

Open Energy Info (EERE)

Total Cost Per MwH for all common large scale power generation sources Total Cost Per MwH for all common large scale power generation sources Home > Groups > DOE Wind Vision Community In the US DOEnergy, are there calcuations for real cost of energy considering the negative, socialized costs of all commercial large scale power generation soruces ? I am talking about the cost of mountain top removal for coal mined that way, the trip to the power plant, the sludge pond or ash heap, the cost of the gas out of the stack, toxificaiton of the lakes and streams, plant decommision costs. For nuclear yiou are talking about managing the waste in perpetuity. The plant decomission costs and so on. What I am tring to get at is the 'real cost' per MWh or KWh for the various sources ? I suspect that the costs commonly quoted for fossil fuels and nucelar are

Note: This page contains sample records for the topic "large scale chp" 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

Regional climate consequences of large-scale cool roof and photovoltaic array deployment  

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

climate consequences of large-scale cool roof and photovoltaic array deployment climate consequences of large-scale cool roof and photovoltaic array deployment This article has been downloaded from IOPscience. Please scroll down to see the full text article. 2011 Environ. Res. Lett. 6 034001 (http://iopscience.iop.org/1748-9326/6/3/034001) Download details: IP Address: 98.204.49.123 The article was downloaded on 01/07/2011 at 12:38 Please note that terms and conditions apply. View the table of contents for this issue, or go to the journal homepage for more Home Search Collections Journals About Contact us My IOPscience IOP PUBLISHING ENVIRONMENTAL RESEARCH LETTERS Environ. Res. Lett. 6 (2011) 034001 (9pp) doi:10.1088/1748-9326/6/3/034001 Regional climate consequences of large-scale cool roof and photovoltaic array deployment Dev Millstein and Surabi Menon Lawrence

322

U.S. Signs International Fusion Energy Agreement; Large-Scale, Clean Fusion  

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

U.S. Signs U.S. Signs International Fusion Energy Agreement; Large-Scale, Clean Fusion Energy Project to Begin Construction 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 11.21.06 U.S. Signs International Fusion Energy Agreement; Large-Scale, Clean Fusion Energy Project to Begin Construction Print Text Size: A A A Subscribe FeedbackShare Page Large-Scale, Clean Fusion Energy Project to Begin Construction November 21, 2006 PARIS, FRANCE - Representing the United States, Dr. Raymond L. Orbach, Under Secretary for Science of the U.S. Department of Energy (DOE), today joined counterparts from China, the European Union, India, Japan, the

323

Energy Department Loan Guarantee Would Support Large-Scale Rooftop Solar  

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

Loan Guarantee Would Support Large-Scale Rooftop Loan Guarantee Would Support Large-Scale Rooftop Solar Power for U.S. Military Housing Energy Department Loan Guarantee Would Support Large-Scale Rooftop Solar Power for U.S. Military Housing September 7, 2011 - 2:10pm Addthis Washington D.C. - U.S. Energy Secretary Steven Chu today announced the offer of a conditional commitment for a partial guarantee of a $344 million loan that will support the SolarStrong Project, which is expected to be a record expansion of residential rooftop solar power in the United States. Under the SolarStrong Project, SolarCity Corporation will install, own and operate up to 160,000 rooftop solar installations on as many as 124 U.S. military bases in up to 33 states. SolarCity expects the project to fund approximately 750 construction jobs over five years and 28 full time

324

Dark energy, integrated Sachs-Wolfe effect and large-scale magnetic fields  

E-Print Network (OSTI)

The impact of large-scale magnetic fields on the interplay between the ordinary and integrated Sachs-Wolfe effects is investigated in the presence of a fluctuating dark energy component. The modified initial conditions of the Einstein-Boltzmann hierarchy allow for the simultaneous inclusion of dark energy perturbations and of large-scale magnetic fields. The temperature and polarization angular power spectra are compared with the results obtained in the magnetized version of the (minimal) concordance model. Purported compensation effects arising at large scales are specifically investigated. The fluctuating dark energy component modifies, in a computable manner, the shapes of the 1- and 2-$\\sigma$ contours in the parameter space of the magnetized background. The allowed spectral indices and magnetic field intensities turn out to be slightly larger than those determined in the framework of the magnetized concordance model where the dark energy fluctuations are absent.

Massimo Giovannini

2009-07-18T23:59:59.000Z

325

No large scale curvature perturbations during the waterfall phase transition of hybrid inflation  

Science Conference Proceedings (OSTI)

In this paper the possibility of generating large scale curvature perturbations induced from the entropic perturbations during the waterfall phase transition of the standard hybrid inflation model is studied. We show that whether or not appreciable amounts of large scale curvature perturbations are produced during the waterfall phase transition depends crucially on the competition between the classical and the quantum mechanical backreactions to terminate inflation. If one considers only the classical evolution of the system, we show that the highly blue-tilted entropy perturbations induce highly blue-tilted large scale curvature perturbations during the waterfall phase transition which dominate over the original adiabatic curvature perturbations. However, we show that the quantum backreactions of the waterfall field inhomogeneities produced during the phase transition dominate completely over the classical backreactions. The cumulative quantum backreactions of very small scale tachyonic modes terminate inflation very efficiently and shut off the curvature perturbation evolution during the waterfall phase transition. This indicates that the standard hybrid inflation model is safe under large scale curvature perturbations during the waterfall phase transition.

Abolhasani, Ali Akbar [Department of Physics, Sharif University of Technology, Tehran (Iran, Islamic Republic of); School of Physics, Institute for Research in Fundamental Sciences (IPM), P.O. Box 19395-5531, Tehran (Iran, Islamic Republic of); Firouzjahi, Hassan [School of Physics, Institute for Research in Fundamental Sciences (IPM), P.O. Box 19395-5531, Tehran (Iran, Islamic Republic of)

2011-03-15T23:59:59.000Z

326

Observation of femtosecond laser-induced nanostructure-covered large scale waves on metals  

SciTech Connect

Following femtosecond (fs) laser pulse irradiation, we produce a type of periodic surface structure with a period tens of times greater than the laser wavelength and densely covered by an iterating pattern that consists of stripes of nanostructures and microscale cellular structures. The morphology of this large scale wave pattern crucially depends on laser fluence and the number of laser pulses, but not on the laser wavelength. Our study suggests that this large scale wave is initiated by fs laser induced surface unevenness followed by periodically distributed nonuniform surface heating from fs pulse irradiation.

Hwang, Taek Yong; Guo Chunlei [Institute of Optics, University of Rochester, Rochester, New York 14627 (United States)

2011-04-15T23:59:59.000Z

327

Software System Design for Large Scale, Spatially-explicit Agroecosystem Modeling  

SciTech Connect

Recently, site-based agroecosystem model has been applied at regional and state level to enable comprehensive analyses of environmental sustainability of food and biofuel production. Those large-scale, spatially-explicit simulations present computational challenges in software systems design. Herein, we describe our software system design for large-scale, spatially-explicit agroecosystem modeling and data analysis. First, we describe the software design principles in three major phases: data preparation, high performance simulation, and data management and analysis. Then, we use a case study at a regional intensive modeling area (RIMA) to demonstrate our system implementation and capability.

Wang, Dali [ORNL; Nichols, Dr Jeff A [ORNL; Kang, Shujiang [ORNL; Post, Wilfred M [ORNL; Liu, Sumang [ORNL

2012-01-01T23:59:59.000Z

328

A micro-COOLING, HEATING, AND POWER (m-CHP) INSTRUCTIONAL MODULE.  

E-Print Network (OSTI)

??Cooling, Heating, and Power (CHP) is an emerging category of energy systems consisting of power generation equipment coupled with thermally activated components. The application of… (more)

Oliver, Jason Ryan

2005-01-01T23:59:59.000Z

329

Data Analysis and Visualization Environments for Large Scale Simulation as presented by  

E-Print Network (OSTI)

Sandia National Laboratories has been researching data analysis and visualization through several approaches. They have been research partners on several large open source projects as well as commercial and classified projects. Current research is centered around cluster solutions based largely on consumer hardware. Constantine Pavlakos outlined the historical research and the motivating problems behind the modern visualization efforts underway at SNL. The basic problem is that the data produced by large scale simulations is far too large to be handled sloppily. The data sets Mr. Pavlakos presented as examples were often on the order of half a petabyte in size. To address many of the issues associated with data sets of this scale Sandia has pursued cluster based solutions. I have a personal interest in this solution, and have experimented with the power wall that the UNM CS department

Constantine Pavlakos; Christopher E. Davis

2004-01-01T23:59:59.000Z

330

Shear-current effect in a turbulent convection with a large-scale shear  

E-Print Network (OSTI)

The shear-current effect in a nonrotating homogeneous turbulent convection with a large-scale constant shear is studied. The large-scale velocity shear causes anisotropy of turbulent convection, which produces the mean electromotive force $\\bec{\\cal E}^{(W)} \\propto {\\bf W} {\\bf \\times} {\\bf J}$ and the mean electric current along the original mean magnetic field, where ${\\bf W}$ is the background mean vorticity due to the shear and ${\\bf J}$ is the mean electric current. This results in a large-scale dynamo even in a nonrotating and nonhelical homogeneous sheared turbulent convection, whereby the $\\alpha$ effect vanishes. It is found that turbulent convection promotes the shear-current dynamo instability, i.e., the heat flux causes positive contribution to the shear-current effect. However, there is no dynamo action due to the shear-current effect for small hydrodynamic and magnetic Reynolds numbers even in a turbulent convection, if the spatial scaling for the turbulent correlation time is $\\tau(k) \\propto k^{-2}$, where $k$ is the small-scale wave number.

I. Rogachevskii; N. Kleeorin

2007-02-24T23:59:59.000Z

331

Supporting ad-hoc re-planning and shareability at large-scale events  

Science Conference Proceedings (OSTI)

In this paper we present results from a research and development project focusing on the use of mobile phones at a music festival. Our aim is to explore how the festival experience can be enhanced with the introduction of mobile services. Two questions ... Keywords: coordination, ethnography, festival, groups, interaction design, large-scale event, mobile service, mobility, planning

Sarah Lindström; Mårten Pettersson

2010-11-01T23:59:59.000Z

332

IDO: intelligent data outsourcing with improved RAID reconstruction performance in large-scale data centers  

Science Conference Proceedings (OSTI)

Dealing with disk failures has become an increasingly common task for system administrators in the face of high disk failure rates in large-scale data centers consisting of hundreds of thousands of disks. Thus, achieving fast recovery from disk failures ...

Suzhen Wu; Hong Jiang; Bo Mao

2012-12-01T23:59:59.000Z

333

Investigating self-similarity and heavy-tailed distributions on a large-scale experimental facility  

Science Conference Proceedings (OSTI)

After the seminal work by Taqqu et al. relating self-similarity to heavy-tailed distributions, a number of research articles verified that aggregated Internet traffic time series show self-similarity and that Internet attributes, like Web file sizes ... Keywords: heavy-tailed distributions, large-scale experiments, monitoring, network traffic, self-similarity

Patrick Loiseau; Paulo Gonçalves; Guillaume Dewaele; Pierre Borgnat; Patrice Abry; Pascale Vicat-Blanc Primet

2010-08-01T23:59:59.000Z

334

Using Markov chain analysis to study dynamic behaviour in large-scale grid systems  

Science Conference Proceedings (OSTI)

In large-scale grid systems with decentralized control, the interactions of many service providers and consumers will likely lead to emergent global system behaviours that result in unpredictable, often detrimental, outcomes. This possibility argues ... Keywords: discrete Markov chain, grid computing, perturbation analysis, piece-wise homogenous Markov chain

Christopher Dabrowski; Fern Hunt

2009-01-01T23:59:59.000Z

335

Emergence of learning in computer-supported, large-scale collective dynamics: a research agenda  

Science Conference Proceedings (OSTI)

Seen through the lens of complexity theory, past CSCL research may largely be characterized as small-scale (i.e., small-group) collective dynamics. While this research tradition is substantive and meaningful in its own right, we propose a line of inquiry ...

Manu Kapur; David Hung; Michael Jacobson; John Voiklis; Charles K. Kinzer; Chen Der-Thanq Victor

2007-07-01T23:59:59.000Z

336

Synthesis and control on large scale multi-touch sensing displays  

Science Conference Proceedings (OSTI)

In this paper, we describe our experience in musical interface design for a large scale, high-resolution, multi-touch display surface. We provide an overview of historical and present-day context in multi-touch audio interaction, and describe our approach ... Keywords: bi-manual, dynamic patching, multi-touch, multi-user, synthesis, tactile, touch

Philip L. Davidson; Jefferson Y. Han

2006-06-01T23:59:59.000Z

337

Lessons Learned from Large-Scale User Studies: Using Android Market as a Source of Data  

Science Conference Proceedings (OSTI)

User studies with mobile devices have typically been cumbersome, since researchers have had to recruit participants, hand out or configure devices, and offer incentives and rewards. The increasing popularity of application stores has allowed researchers ... Keywords: Application Stores, Computer Science, Large-Scale Study, Mobile Computing, Mobile Devices, Ubiquitous Computing

Denzil Ferreira; Vassilis Kostakos; Anind K. Dey

2012-07-01T23:59:59.000Z

338

An Analysis of Klemp–Wilhelmson Schemes as Applied to Large-Scale Wave Modes  

Science Conference Proceedings (OSTI)

The use of Klemp–Wilhelmson (KW) time splitting for large-scale and global modeling is assessed through a series of von Neumann accuracy and stability analyses. Two variations of the KW splitting are evaluated in particular: the original acoustic-...

Kevin C. Viner; Craig C. Epifanio

2008-12-01T23:59:59.000Z

339

Efficient data management in a large-scale epidemiology research project  

Science Conference Proceedings (OSTI)

This article describes the concept of a ''Central Data Management'' (CDM) and its implementation within the large-scale population-based medical research project ''Personalized Medicine''. The CDM can be summarized as a conjunction of data capturing, ... Keywords: Central Data Management, Electronic Case Report Forms, Electronic Data Capture, Individualized medicine, Personalized Medicine

Jens Meyer; Stefan Ostrzinski; Daniel Fredrich; Christoph Havemann; Janina Krafczyk; Wolfgang Hoffmann

2012-09-01T23:59:59.000Z

340

Overlay networks for task allocation and coordination in large-scale networks of cooperative agents  

Science Conference Proceedings (OSTI)

This paper proposes a novel method for scheduling and allocating atomic and complex tasks in large-scale networks of homogeneous or heterogeneous cooperative agents. Our method encapsulates the concepts of searching, task allocation and scheduling seamlessly ... Keywords: Cooperation, Cooperative agents, Coordination, Distributed constraint processing, Task and resource allocation

Panagiotis Karagiannis; George Vouros; Kostas Stergiou; Nikolaos Samaras

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "large scale chp" 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

Proceedings of the First International Workshop on Data Dissemination for Large Scale Complex Critical Infrastructures  

Science Conference Proceedings (OSTI)

Welcome to Valencia and to the first edition of the workshop on Data Distribution for Large-scale Complex Critical Infrastructures (DD4LCCI 2010). This workshop aims at providing a forum for researchers and engineers in academia and industry to foster ...

Christian Esposito; Aniruddha Gokhale; Domenico Cotroneo; Douglas C. Schmidt

2010-04-01T23:59:59.000Z

342

A practical ontology for the large-scale modeling of scholarly artifacts and their usage  

Science Conference Proceedings (OSTI)

The large-scale analysis of scholarly artifact usage is constrained primarily by current practices in usage data archiving, privacy issues concerned with the dissemination of usage data, and the lack of a practical ontology for modeling the usage domain. ... Keywords: resource description framework and schema, semantic networks, web ontology language

Marko A. Rodriguez; Johan Bollen; Herbert Van de Sompel

2007-06-01T23:59:59.000Z

343

Benchmarking parallel i/o performance for a large scale scientific application on the teragrid  

Science Conference Proceedings (OSTI)

This paper is a report on experiences in benchmarking I/O performance on leading computational facilities on the NSF TeraGrid network with a large scale scientific application. Instead of focusing only on the raw file I/O bandwidth provided by different ...

Frank Löffler; Jian Tao; Gabrielle Allen; Erik Schnetter

2009-08-01T23:59:59.000Z

344

Large-scale pattern growth of graphene films for stretchable transparent electrodes  

E-Print Network (OSTI)

of these highly conducting and transparent electrodes in flexible, stretchable, foldable electronics8,9 . Graphene growth provides high-quality multilayer graphene samples interacting strongly with their substrates method to grow and transfer high-quality stretchable graphene films on a large scale using CVD on nickel

Kim, Philip

345

PIV Studies of Large Scale Structures in the Near Field of Small Aspect Ratio Elliptic Jets  

Science Conference Proceedings (OSTI)

The near flow field of small aspect ratio elliptic turbulent free jets (issuing from nozzle and orifice) was experimentally studied using a 2D PIV. Two point velocity correlations in these jets revealed the extent and orientation of the large scale structures ... Keywords: Axis switching, Elliptic jet, PIV, Spatial filtering, Two point correlation

G. Ramesh; L. Venkatakrishnan; A. Prabhu

2006-01-01T23:59:59.000Z

346

Sensory experience modifies spontaneous state dynamics in a large-scale barrel cortical model  

Science Conference Proceedings (OSTI)

Experimental evidence suggests that spontaneous neuronal activity may shape and be shaped by sensory experience. However, we lack information on how sensory experience modulates the underlying synaptic dynamics and how such modulation influences the ... Keywords: Barrel cortex, Large-scale model, STDP, Spontaneous dynamics

Elena Phoka; Mark Wildie; Simon R. Schultz; Mauricio Barahona

2012-10-01T23:59:59.000Z

347

Statistical Characteristics of the Large-Scale Response of Coastal Sea Level to Atmospheric Forcing  

Science Conference Proceedings (OSTI)

As part of a study of the large-scale response of coastal sea level to atmospheric forcing along the west coast of North America during June–September 1973, Halliwell and Allen calculate space- and time-lagged cross-correlation coefficients R?? ...

J. S. Allen; D. W. Denbo

1984-06-01T23:59:59.000Z

348

A sequential cooperative game theoretic approach to scheduling multiple large-scale applications in grids  

Science Conference Proceedings (OSTI)

Scheduling large-scale applications in heterogeneous distributed computing systems is a fundamental NP-complete problem that is critical to obtaining good performance and execution cost. In this paper, we address the scheduling problem of an important ... Keywords: Economic cost, Game theory, Grid computing, Performance, Scheduling, Storage

Rubing Duan, Radu Prodan, Xiaorong Li

2014-01-01T23:59:59.000Z

349

Tunable Fano resonance in large scale polymer-dielectric slab photonic crystals  

Science Conference Proceedings (OSTI)

Using interference lithography and deposition technique we have fabricated large scale quasi one dimensional polymer-dielectric photonic crystal that provides sharp and deep Fano resonance in the transmission spectrum of the PC at normal incidence. Due ... Keywords: Interference lithography, Optical switch, Photonic crystals, Polymer, Tunable filter

Reza Asadi; Shahin Bagheri; Mahdi Khaje; Mohammad Malekmohammad; Mohammad-Taghi Tavassoly

2012-09-01T23:59:59.000Z

350

Large-Scale Dynamics of the Meiyu-Baiu Rainband: Environmental Forcing by the Westerly Jet  

Science Conference Proceedings (OSTI)

Meiyu-baiu is the major rainy season from central China to Japan brought by a zonally elongated rainband from June to mid-July. Large-scale characteristics and environmental forcing of this important phenomenon are investigated based on a ...

Takeaki Sampe; Shang-Ping Xie

2010-01-01T23:59:59.000Z

351

Time efficient fabrication of ultra large scale nano dot arrays using electron beam lithography  

Science Conference Proceedings (OSTI)

An astonishingly simple yet versatile alternative method for the creation of ultra large scale nano dot arrays [1-3] utilising the fact that exposure in electron beam lithography (EBL) is performed by addressing single pixels with defined distances is ... Keywords: Electron beam lithography, Nano dot, Patterning, Photonic crystal, Plasmonics

Jochen Grebing; JüRgen FaíBender; Artur Erbe

2012-09-01T23:59:59.000Z

352

Large-scale Probabilistic Forecasting in Energy Systems using Sparse Gaussian Conditional Random Fields  

E-Print Network (OSTI)

pricing. Although it is known that probabilistic forecasts (which give a distribution over possible futureLarge-scale Probabilistic Forecasting in Energy Systems using Sparse Gaussian Conditional Random Fields Matt Wytock and J. Zico Kolter Abstract-- Short-term forecasting is a ubiquitous practice

Kolter, J. Zico

353

Hurricane Climatic Fluctuations. Part II: Relation to Large-Scale Circulation  

Science Conference Proceedings (OSTI)

Correlations are computed between interannual fluctuations of hurricane incidence in the Atlantic basin and large-scale patterns of seasonally-averaged sea-level pressure (SLP; 1899–1978), sea-surface temperature (SST; 1899–1967), and 500 mb ...

Lloyd J. Shapiro

1982-08-01T23:59:59.000Z

354

Computing and Data Infrastructure for Large-Scale Science NERSC and the DOE Science Grid  

E-Print Network (OSTI)

-bandwidth connectivity end to end (high-speed links from site systems to ESnet gateways) ­ Storage resources: four ­ Collaboration with ESnet for security and directory services #12;Initial Science Grid Configuration NERSC Supercomputing & Large-Scale Storage PNNL LBNL ANL ESnet Europe DOE Science Grid ORNL ESNet MDS CA Grid Managed

355

An automatic water management system for large-scale rice paddy fields  

Science Conference Proceedings (OSTI)

An automatic water management system for large-scale paddy fields has been developed. The purposes of that are to supply the paddy fields with water or drain water from that automatically, to decrease water consumption, and to have a good harvest. To ... Keywords: estimating mean water level, optimal water allocation, paddy field, predict field consumption, prediction of growth stages, water level control

Teruji Sekozawa

2010-10-01T23:59:59.000Z

356

An Integrated Docking Pipeline for the Prediction of Large-Scale Protein-Protein Interactions  

E-Print Network (OSTI)

An Integrated Docking Pipeline for the Prediction of Large-Scale Protein-Protein Interactions Xin. In this study, we developed a protein-protein docking pipeline (PPDP) that integrates a variety of state studies. In this study, we developed a protein-protein docking pipeline by integrat

357

Interactive remote large-scale data visualization via prioritized multi-resolution streaming  

Science Conference Proceedings (OSTI)

The simulations that run on petascale and future exascale supercomputers pose a difficult challenge for scientists to visualize and analyze their results remotely. They are limited in their ability to interactively visualize their data mainly due to ... Keywords: data intensive supercomputing, distance visualization, large scale data, remote visualization, visualization systems

James P. Ahrens; Jonathan Woodring; David E. DeMarle; John Patchett; Mathew Maltrud

2009-11-01T23:59:59.000Z

358

An analytical framework for particle and volume data of large-scale combustion simulations  

Science Conference Proceedings (OSTI)

This paper presents a framework to enable parallel data analyses and visualizations that combine both Lagrangian particle data and Eulerian field data of large-scale combustion simulations. Our framework is characterized by a new range query based design ... Keywords: data transformation and representation, feature extraction and tracking, scalability issues

Franz Sauer, Hongfeng Yu, Kwan-Liu Ma

2013-11-01T23:59:59.000Z

359

MicroTCA implementation of synchronous Ethernet-Based DAQ systems for large scale experiments  

E-Print Network (OSTI)

the form of a tank filled with liquid Argon maintained at about 87 °K by a cryogenic system. An electric the calculation of the track coordinates in 2 dimensions. The third dimension is given by the measurement software. Proposals of such very large scale Liquid Argon Detector foresee the use of Liquefied Natural Gas

Paris-Sud XI, Université de

360

Fountain Codes Based Distributed Storage Algorithms for Large-Scale Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

We consider large-scale networks with n nodes, out of which k are in possession, (e.g., have sensed or collected in some other way) k information packets. In the scenarios in which network nodes are vulnerable because of, for example, limited energy ...

Salah A. Aly; Zhenning Kong; Emina Soljanin

2008-04-01T23:59:59.000Z

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


361

Large-Scale Conditions Favorable for the Development of Heavy Rainfall during TAMEX IOP 3  

Science Conference Proceedings (OSTI)

The large-scale processes responsible for development of heavy precipitation during 20–23 May 1987 along the southeastern China coast are studied. There are two distinct rainfall peaks around 0000 UTC 20 May and 0000 UTC 22 May. Prior to the ...

Yi-Leng Chen; Jun Li

1995-10-01T23:59:59.000Z

362

China's changing landscape during the 1990s: Large-scale land transformations estimated with satellite data  

E-Print Network (OSTI)

China's changing landscape during the 1990s: Large-scale land transformations estimated January 2005. [1] Land-cover changes in China are being powered by demand for food for its growing increased by 2.99 million hectares and urban areas increased by 0.82 million hectares. In northern China

363

FEM Aided Prestress Design for Large-scale Ultra-low-temperature LNG Tank  

Science Conference Proceedings (OSTI)

A large-scale low-temperature aboveground LNG storage tank design is described in detail, especially the process of prestressing tendons configuration using finite element method (FEM). Considering the LNG storage tanks working conditions and corresponding ... Keywords: FEM, LNG, optimize design, prestressing design

Fang-yuan Li; Jin-bao Han

2010-06-01T23:59:59.000Z

364

Large-Scale Urban Modeling by Combining Ground Level Panoramic and Aerial Imagery  

E-Print Network (OSTI)

from the United States Ge- ographic Survey. One aerial image is shown in Fig. 1(a). Another inherentLarge-Scale Urban Modeling by Combining Ground Level Panoramic and Aerial Imagery Lu Wang, Suya You a high resolution orthorecti- fied aerial image to provide the building footprints. Users draw

Shahabi, Cyrus

365

Towards Ontology-based Data Quality Inference in Large-Scale Sensor Networks  

Science Conference Proceedings (OSTI)

This paper presents an ontology-based approach for data quality inference on streaming observation data originating from large-scale sensor networks. We evaluate this approach in the context of an existing river basin monitoring program called the Intelligent ... Keywords: Wireless Sensor Networks, Semantic Web, Distributed Computing

Sam Esswein; Sebastien Goasguen; Chris Post; Jason Hallstrom; David White; Gene Eidson

2012-05-01T23:59:59.000Z

366

Large-scale hybrid poplar production economics: 1995 Alexandria, Minnesota establishment cost and management  

DOE Green Energy (OSTI)

The purpose of this project was to track and monitor costs of planting, maintaining, and monitoring large scale commercial plantings of hybrid poplar in Minnesota. These costs assists potential growers and purchasers of this resource to determine the ways in which supply and demand may be secured through developing markets.

Downing, M. [Oak Ridge National Lab., TN (United States); Langseth, D. [WesMinn Resource Conservation and Development District, Alexandria, MN (United States); Stoffel, R. [Minnesota Dept. of Natural Resources, Alexandria, MN (United States); Kroll, T. [Minnesota Dept. of Natural Resources, St. Paul, MN (United States). Forestry Div.

1996-12-31T23:59:59.000Z

367

The Impact of Initial Condition Uncertainty on Numerical Simulations of Large-scale Explosive Cyclogenesis  

Science Conference Proceedings (OSTI)

The impact of initial condition uncertainty on short-range (up to 48 h) forecasts of large-scale explosive cyclogenesis is examined. Predictability experiments are conducted on 11 cases of rapid oceanic cyclogenesis that occurred in a long-term, ...

Steven L. Mullen; David P. Baumhefner

1989-12-01T23:59:59.000Z

368

The Association of Large-Scale Climate Variability and Teleconnections on Wind Energy Resource  

E-Print Network (OSTI)

The Association of Large-Scale Climate Variability and Teleconnections on Wind Energy Resource over on Wind Energy Resource over Europe and its Intermittency Pascal Kriesche* and Adam Schlosser* Abstract In times of increasing importance of wind power in the world's energy mix, this study focuses on a better

369

Squidball: an experiment in large-scale motion capture and game design  

Science Conference Proceedings (OSTI)

This paper describes Squidball, a new large-scale motion capture based game. It was tested on up to 4000 player audiences last summer at SIGGRAPH 2004. It required the construction of the world's largest motion capture space at the time, and many ...

Christoph Bregler; Clothilde Castiglia; Jessica DeVincezo; Roger Luke DuBois; Kevin Feeley; Tom Igoe; Jonathan Meyer; Michael Naimark; Alexandru Postelnicu; Michael Rabinovich; Sally Rosenthal; Katie Salen; Jeremi Sudol; Bo Wright

2005-11-01T23:59:59.000Z

370

NETL: News Release - First U.S. Large-Scale CO2 Storage Project Advances  

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

April 6, 2009 April 6, 2009 First U.S. Large-Scale CO2 Storage Project Advances One Million Metric Tons of Carbon to be Injected at Illinois Site Washington, DC -Drilling nears completion for the first large-scale carbon dioxide (CO2) injection well in the United States for CO2 sequestration. This project will be used to demonstrate that CO2 emitted from industrial sources - such as coal-fired power plants - can be stored in deep geologic formations to mitigate large quantities of greenhouse gas emissions. MORE INFO Link to the Midwest Geological Sequestration Consortium web site The Archer Daniels Midland Company (ADM) hosted an event April 6 for a CO2 injection test at their Decatur, Ill. ethanol facility. The injection well is being drilled into the Mount Simon Sandstone to a depth more than a mile

371

NAMD - The Engine for Large-Scale Classical MD Simulations of Biomolecular  

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

NAMD NAMD NAMD - The Engine for Large-Scale Classical MD Simulations of Biomolecular Systems Based on a Polarizable Force Field PI Name: Benoit Roux PI Email: roux@uchicago.edu Institution: Argonne National Laboratory & University of Chicago Allocation Program: ESP Allocation Hours at ALCF: 80 Million Year: 2010 to 2013 Research Domain: Biological Sciences Biology, at the atomic and molecular level, is governed by complex interactions involving a large number of key constituents, including water, ions, proteins, nucleic acids, and lipid membranes. The goal of this project is to develop new technologies to simulate virtual models of biomolecular systems with an unprecedented accuracy. Large-scale molecular dynamics (MD) simulations based on atomic models play an increasingly

372

Large-Scale Wind Integration Studies in the United States: Preliminary Results  

DOE Green Energy (OSTI)

The National Renewable Energy Laboratory, under the sponsorship of the U.S. Department of Energy, is managing two large-scale wind integration studies. The Western Wind and Solar Integration Study (WWSIS) covers the footprint of WestConnect, a group of transmission owners that covers most of Colorado, New Mexico, Arizona, Nevada, and Wyoming. The Eastern Wind Integration and Transmission Study (EWITS) covers a large part of the Eastern Interconnection, and leverages a large-scale transmission study known as the Joint Coordinated System Plan (JCSP). Both studies analyze the impact of 20-30% wind energy penetration within the study footprint based on energy. This paper discusses key results that have emerged so far from each study, focusing primarily on simulation results based on hourly production simulations. Results from both studies show that high wind penetrations can be successfully integrated into the power system, but depend on sufficient transmission and significant changes in operations.

Milligan, M.; Lew, D.; Corbus, D.; Piwko, R.; Miller, N.; Clark, K.; Jordan, G.; Freeman, L.; Zavadil, B.; Schuerger, M.

2009-01-01T23:59:59.000Z

373

Gauss-Bonnet Quintessence: Background Evolution, Large Scale Structure and Cosmological Constraints  

E-Print Network (OSTI)

We investigate a string-inspired dark energy scenario featuring a scalar field with a coupling to the Gauss-Bonnet invariant. Such coupling can trigger the onset of late dark energy domination after a scaling matter era. The universe may then cross the phantom divide and perhaps also exit from the acceleration. We discuss extensively the cosmological and astrophysical implications of the coupled scalar field. Data from the Solar system, supernovae Ia, cosmic microwave background radiation, large scale structure and big bang nucleosynthesis is used to constrain the parameters of the model. A good Newtonian limit may require to fix the coupling. With all the data combined, there appears to be some tension with the nucleosynthesis bound, and the baryon oscillation scale seems to strongly disfavor the model. These possible problems might be overcome in more elaborate models. In addition, the validity of these constraints in the present context is not strictly established. Evolution of fluctuations in the scalar field and their impact to clustering of matter is studied in detail and more model-independently. Small scale limit is derived for the perturbations and their stability is addressed. A divergence is found and discussed. The general equations for scalar perturbations are also presented and solved numerically, confirming that the Gauss-Bonnet coupling can be compatible with the observed spectrum of cosmic microwave background radiation as well as the matter power spectrum inferred from large scale surveys.

Tomi Koivisto; David F. Mota

2006-09-22T23:59:59.000Z

374

An Evaluation of the Network Simulators in Large-Scale Distributed Simulations  

Science Conference Proceedings (OSTI)

This is a survey paper about the state-of-the-art in large-scale network simulation. Networks for the smart grids are characterized by millions of sensor nodes exchanging information about the status of the grid. This information exchange must be realized reliably and efficiently due to the mission critical nature of the power grid. Hence, the applications and the network protocols developed for the smart grid need go through rigorous testing and analysis before deployment. Developers usually do not have access to such a large-scale network that can be used as a controlled test-bed; therefore, network simulation becomes an essential tool for testing. Network simulation is a well studied problem in the literature and there are various widely used network simulators. These simulators can be adopted for testing applications and protocols of the smart grid. Due to the scale of these networks, parallel/distributed simulations need to be conducted. Even though most network simulators support distributed simulations, generating a large-scale network model to simulate can still be a cumbersome task. In this survey, we describe a selection of commonly used network simulators and evaluate them with respect to the following features that can aid users in distributed simulations of large-scale networks: transparency of setting up distributed simulation, automated topology generation, information hiding, lightweight routing protocols, network error simulation, evaluation of the network model during simulation and trace analysis tools. As a complementary result, we identify two issues with network simulators that can be addressed with runtime steering methods.

Ciraci, Selim; Akyol, Bora A.

2011-11-13T23:59:59.000Z

375

On scale and magnitude of pressure build-up induced by large-scale geologic storage of CO2  

SciTech Connect

The scale and magnitude of pressure perturbation and brine migration induced by geologic carbon sequestration is discussed assuming a full-scale deployment scenario in which enough CO{sub 2} is captured and stored to make relevant contributions to global climate change mitigation. In this scenario, the volumetric rates and cumulative volumes of CO{sub 2} injection would be comparable to or higher than those related to existing deep-subsurface injection and extraction activities, such as oil production. Large-scale pressure build-up in response to the injection may limit the dynamic storage capacity of suitable formations, because over-pressurization may fracture the caprock, may drive CO{sub 2}/brine leakage through localized pathways, and may cause induced seismicity. On the other hand, laterally extensive sedimentary basins may be less affected by such limitations because (i) local pressure effects are moderated by pressure propagation and brine displacement into regions far away from the CO{sub 2} storage domain; and (ii) diffuse and/or localized brine migration into overlying and underlying formations allows for pressure bleed-off in the vertical direction. A quick analytical estimate of the extent of pressure build-up induced by industrial-scale CO{sub 2} storage projects is presented. Also discussed are pressure perturbation and attenuation effects simulated for two representative sedimentary basins in the USA: the laterally extensive Illinois Basin and the partially compartmentalized southern San Joaquin Basin in California. These studies show that the limiting effect of pressure build-up on dynamic storage capacity is not as significant as suggested by Ehlig-Economides and Economides, who considered closed systems without any attenuation effects.

Zhou, Q.; Birkholzer, J. T.

2011-05-01T23:59:59.000Z

376

Opportunities for Utility-Owned CHP at Dry-Mill Fuel Ethanol Plants  

Science Conference Proceedings (OSTI)

This report quantifies opportunities to co-locate natural-gas-fueled combined heat and power (CHP) facilities with corn dry-mill fuel ethanol plants in the upper Midwest. It also evaluates the opportunity to generate renewable power by fueling the CHP plants with biogas produced by anaerobic digestion of the byproducts of the corn wet-milling process.

2008-09-23T23:59:59.000Z

377

NETL: News Release - Projects Selected to Address Challenges of Large-Scale  

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

3, 2008 3, 2008 Projects Selected to Address Challenges of Large-Scale Hydrogen Production from Coal and Coal-Biomass WASHINGTON, D. C. - The U.S. Department of Energy (DOE) announced today the selection of six projects that will address challenges facing the large-scale production of hydrogen from coal and coal-biomass mixtures. The ability of hydrogen to fuel transportation, power generation and industrial processes with only water as a by-product makes it an efficient and clean fuel to meet growing U.S. energy demands while assuring energy security. The National Academies affirmed in a 2004 report that hydrogen could fundamentally transform U.S. energy systems, but coal must be a significant component for making very large amounts of the gas. To address the challenges of large-scale production of hydrogen from coal, the Hydrogen Fuel Initiative was launched in 2003, announcing a $1.2 billion commitment to a hydrogen economy that minimizes America's dependence on foreign oil and reduces greenhouse gas emissions. The Presidential initiative also provides funding for hydrogen research and development (R&D).

378

Approaching the exa-scale: a real-world evaluation of rendering extremely large data sets  

Science Conference Proceedings (OSTI)

Extremely large scale analysis is becoming increasingly important as supercomputers and their simulations move from petascale to exascale. The lack of dedicated hardware acceleration for rendering on today's supercomputing platforms motivates our detailed evaluation of the possibility of interactive rendering on the supercomputer. In order to facilitate our understanding of rendering on the supercomputing platform, we focus on scalability of rendering algorithms and architecture envisioned for exascale datasets. To understand tradeoffs for dealing with extremely large datasets, we compare three different rendering algorithms for large polygonal data: software based ray tracing, software based rasterization and hardware accelerated rasterization. We present a case study of strong and weak scaling of rendering extremely large data on both GPU and CPU based parallel supercomputers using Para View, a parallel visualization tool. Wc use three different data sets: two synthetic and one from a scientific application. At an extreme scale, algorithmic rendering choices make a difference and should be considered while approaching exascale computing, visualization, and analysis. We find software based ray-tracing offers a viable approach for scalable rendering of the projected future massive data sizes.

Patchett, John M [Los Alamos National Laboratory; Ahrens, James P [Los Alamos National Laboratory; Lo, Li - Ta [Los Alamos National Laboratory; Browniee, Carson S [Los Alamos National Laboratory; Mitchell, Christopher J [Los Alamos National Laboratory; Hansen, Chuck [UNIV OF UTAH

2010-10-15T23:59:59.000Z

379

A Statistical Framework to Identify the Influence of Large-Scale Weather Events on Regional Air Pollution  

Science Conference Proceedings (OSTI)

Regional air pollution episodes occur as a result of increased emissions and prevalence of conducive meteorological conditions. The frequency of occurrence of such favorable conditions on a regional scale may be influenced by large-scale climatic ...

Angadh Singh; Ahmet Palazoglu

2011-12-01T23:59:59.000Z

380

Combined Heat and Power (CHP): Is It Right For Your Facility?  

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

Partnership with the US DOE Partnership with the US DOE Combined Heat and Power (CHP) Is It Right For Your Facility U.S. DOE Industrial Technologies Program Webcast Series May 14 th , 2009 John J. Cuttica Cliff Haefke 312/996-4382 312/355-3476 cuttica@uic.edu chaefk1@uic.edu In Partnership with the US DOE Mid Atlantic www.chpcenterma.org Midwest www.chpcentermw.org Pacific www.chpcenterpr.org Northwest Region www.chpcenternw.org Northeast www.northeastchp.org Intermountain www.IntermountainCHP.org Gulf Coast www.GulfCoastCHP.org Southeastern www.chpcenterse.org In Partnership with the US DOE CHP Decision Making Process Presented by Ted Bronson & Joe Orlando Webcast Series January 8, 2009 CHP Regional Application Centers Walkthrough STOP Average Costs Typical Performance Yes No Energy Rates Profiles

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381

Large-scale Ocean-based or Geothermal Power Plants by Thermoelectric Effects  

E-Print Network (OSTI)

Heat resources of small temperature difference are easily accessible, free and unlimited on earth. Thermoelectric effects provide the technology for converting these heat resources directly into electricity. We present designs of electricity generators based on thermoelectric effects and using heat resources of small temperature difference, e.g., ocean water at different depths and geothermal sources, and conclude that large-scale power plants based on thermoelectric effects are feasible and economically competitive. The key observation is that the power factor of thermoelectric materials, unlike the figure of merit, can be improved by orders of magnitude upon laminating good conductors and good thermoelectric materials. The predicted large-scale power plants based on thermoelectric effects, if validated, will have a global economic and social impact for its scalability, and the renewability, free and unlimited supply of heat resources of small temperature difference on earth.

Liu, Liping

2012-01-01T23:59:59.000Z

382

Structure Discovery in Large Semantic Graphs Using Extant Ontological Scaling and Descriptive Statistics  

Science Conference Proceedings (OSTI)

As semantic datasets grow to be very large and divergent, there is a need to identify and exploit their inherent semantic structure for discovery and optimization. Towards that end, we present here a novel methodology to identify the semantic structures inherent in an arbitrary semantic graph dataset. We first present the concept of an extant ontology as a statistical description of the semantic relations present amongst the typed entities modeled in the graph. This serves as a model of the underlying semantic structure to aid in discovery and visualization. We then describe a method of ontological scaling in which the ontology is employed as a hierarchical scaling filter to infer different resolution levels at which the graph structures are to be viewed or analyzed. We illustrate these methods on three large and publicly available semantic datasets containing more than one billion edges each. Keywords-Semantic Web; Visualization; Ontology; Multi-resolution Data Mining;

al-Saffar, Sinan; Joslyn, Cliff A.; Chappell, Alan R.

2011-07-18T23:59:59.000Z

383

A PRACTICAL ONTOLOGY FOR THE LARGE-SCALE MODELING OF SCHOLARLY ARTIFACTS AND THEIR USAGE  

SciTech Connect

The large-scale analysis of scholarly artifact usage is constrained primarily by current practices in usage data archiving, privacy issues concerned with the dissemination of usage data, and the lack of a practical ontology for modeling the usage domain. As a remedy to the third constraint, this article presents a scholarly ontology that was engineered to represent those classes for which large-scale bibliographic and usage data exists, supports usage research, and whose instantiation is scalable to the order of 50 million articles along with their associated artifacts (e.g. authors and journals) and an accompanying 1 billion usage events. The real world instantiation of the presented abstract ontology is a semantic network model of the scholarly community which lends the scholarly process to statistical analysis and computational support. They present the ontology, discuss its instantiation, and provide some example inference rules for calculating various scholarly artifact metrics.

RODRIGUEZ, MARKO A. [Los Alamos National Laboratory; BOLLEN, JOHAN [Los Alamos National Laboratory; VAN DE SOMPEL, HERBERT [Los Alamos National Laboratory

2007-01-30T23:59:59.000Z

384

Molecular Dynamics Simulations from SNL's Large-scale Atomic/Molecular Massively Parallel Simulator (LAMMPS)  

DOE Data Explorer (OSTI)

LAMMPS (http://lammps.sandia.gov/index.html) stands for Large-scale Atomic/Molecular Massively Parallel Simulator and is a code that can be used to model atoms or, as the LAMMPS website says, as a parallel particle simulator at the atomic, meso, or continuum scale. This Sandia-based website provides a long list of animations from large simulations. These were created using different visualization packages to read LAMMPS output, and each one provides the name of the PI and a brief description of the work done or visualization package used. See also the static images produced from simulations at http://lammps.sandia.gov/pictures.html The foundation paper for LAMMPS is: S. Plimpton, Fast Parallel Algorithms for Short-Range Molecular Dynamics, J Comp Phys, 117, 1-19 (1995), but the website also lists other papers describing contributions to LAMMPS over the years.

Plimpton, Steve; Thompson, Aidan; Crozier, Paul

385

Solving Large Scale Nonlinear Eigenvalue Problem in Next-Generation Accelerator Design  

SciTech Connect

A number of numerical methods, including inverse iteration, method of successive linear problem and nonlinear Arnoldi algorithm, are studied in this paper to solve a large scale nonlinear eigenvalue problem arising from finite element analysis of resonant frequencies and external Q{sub e} values of a waveguide loaded cavity in the next-generation accelerator design. They present a nonlinear Rayleigh-Ritz iterative projection algorithm, NRRIT in short and demonstrate that it is the most promising approach for a model scale cavity design. The NRRIT algorithm is an extension of the nonlinear Arnoldi algorithm due to Voss. Computational challenges of solving such a nonlinear eigenvalue problem for a full scale cavity design are outlined.

Liao, Ben-Shan; Bai, Zhaojun; /UC, Davis; Lee, Lie-Quan; Ko, Kwok; /SLAC

2006-09-28T23:59:59.000Z

386

A Climatology of Tropical Anvil and Its Relationship to the Large-Scale Circulation  

E-Print Network (OSTI)

This dissertation uses multiple tools to investigate tropical anvil, i.e., thick, non-precipitating cloud associated with deep convection with the main objectives to provide a climatology of tropics-wide anvil properties and a better understanding of anvil formation, and to provide a more realistic assessment of the radiative impact of tropical anvil on the large-scale circulation. Based on 10 years (1998-2007) of observations, anvil observed by the Tropical Rainfall Measuring Mission (TRMM) Precipitation (PR) shows significant geographical variations, which can be linked to variations in the parent convection. Strong upper level wind shear appears to assist the generation of anvil and may further explain the different anvil statistics over land and ocean. Variations in the large-scale environment appear to play a more important role in anvil production in regions where convection regularly attains heights greater than 7 km. For regions where convection is less deep, variations in the depth of the convection and the large-scale environment likely contribute more equally to anvil generation. Anvil radiative heating profiles are estimated by extrapolating millimeter cloud radar (MMCR) radiative properties from Manus to the 10-year TRMM PR record. When the unconditional anvil areal coverage is taken into account, the anvil radiative heating becomes quite weak, increasing the PR latent heating profile by less than 1 percent at mid and upper levels. Stratiform rain and cirrus radiative heating contributions increase the upper level latent heating by 12 percent. This tropical radiative heating only slightly enhances the latent heating driven model response throughout the tropics, but more significantly over the East Pacific. These modest circulation changes suggest that previous studies may have overemphasized the importance of radiative heating in terms of Walker and Hadley circulation variations. Further, the relationship of cloud radiative heating to latent heating needs to be taken into account for more realistic studies of cloud radiative forcing on the large-scale circulation.

Li, Wei

2009-12-01T23:59:59.000Z

387

A ranking and exploration service based on large-scale usage data  

SciTech Connect

This poster presents the architecture and user interface of a prototype service that was designed to allow end-users to explore the s tructure of science and perform assessments of scholarly impact on the basis of large-scale usage data. The underlying usage data set was constructed by the NIESUR project which collected 1 billion usage events from a wide range of publishers, aggregators and institutional consortia.

Bollen, Johan [Los Alamos National Laboratory; Van De Sompel, Herbert L [Los Alamos National Laboratory; Balakireva, Lyudmila L [Los Alamos National Laboratory; Chute, Ryan M [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

388

The Effects of Human Resource Development on Operational and Financial Performance of Manufacturing Companies: A Large-Scale, Longitudinal Analysis  

E-Print Network (OSTI)

of Manufacturing Companies: A Large-Scale, Longitudinalfrom 207 manufacturing companies at three time points over aestimated that American companies spend approximately $134

Young Sung, Sun; Choi, Jin Nam

2011-01-01T23:59:59.000Z

389

Design of Heat Exchanger for Heat Recovery in CHP Systems  

E-Print Network (OSTI)

The objective of this research is to review issues related to the design of heat recovery unit in Combined Heat and Power (CHP) systems. To meet specific needs of CHP systems, configurations can be altered to affect different factors of the design. Before the design process can begin, product specifications, such as steam or water pressures and temperatures, and equipment, such as absorption chillers and heat exchangers, need to be identified and defined. The Energy Engineering Laboratory of the Mechanical Engineering Department of the University of Louisiana at Lafayette and the Louisiana Industrial Assessment Center has been donated an 800kW diesel turbine and a 100 ton absorption chiller from industries. This equipment needs to be integrated with a heat exchanger to work as a Combined Heat and Power system for the University which will supplement the chilled water supply and electricity. The design constraints of the heat recovery unit are the specifications of the turbine and the chiller which cannot be altered.

Kozman, T. A.; Kaur, B.; Lee, J.

2009-05-01T23:59:59.000Z

390

Best Practices and Tools for Large-scale Deployment of Renewable Energy and  

Open Energy Info (EERE)

Best Practices and Tools for Large-scale Deployment of Renewable Energy and Best Practices and Tools for Large-scale Deployment of Renewable Energy and Energy Efficiency Techniques Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Best Practices and Tools for Large-scale Deployment of Renewable Energy and Energy Efficiency Techniques in ESCWA Agency/Company /Organization: United Nations Economic and Social Commission for Western Asia Focus Area: Energy Efficiency, Renewable Energy, Solar, Wind Topics: Implementation, Policies/deployment programs, Background analysis Resource Type: Lessons learned/best practices Website: www.escwa.un.org/information/publications/edit/upload/sdpd-09-TP3.pdf Country: Bahrain, Egypt, Iraq, Jordan, Kuwait, Lebanon, Oman, Qatar, Saudi Arabia, Sudan, Syria, United Arab Emirates, Yemen UN Region: "Western Asia & North Africa" is not in the list of possible values (Eastern Africa, Middle Africa, Northern Africa, Southern Africa, Western Africa, Caribbean, Central America, South America, Northern America, Central Asia, Eastern Asia, Southern Asia, South-Eastern Asia, Western Asia, Eastern Europe, Northern Europe, Southern Europe, Western Europe, Australia and New Zealand, Melanesia, Micronesia, Polynesia, Latin America and the Caribbean) for this property.

391

Mechanism for the suppression of quantum noise at large scales on expanding space  

E-Print Network (OSTI)

We present an exactly-solvable model for the suppression of quantum noise at large scales on expanding space. The suppression arises naturally in the de Broglie-Bohm pilot-wave formulation of quantum theory, according to which the Born probability rule has a dynamical origin. For a scalar field on a radiation-dominated background we construct the exact solution for the time-evolving wave functional and study properties of the associated field trajectories. It is shown that the time evolution of a field mode on expanding space is mathematically equivalent to that of a standard harmonic oscillator with a 'retarded time' that depends on the wavelength of the mode. In the far super-Hubble regime the equivalent oscillator evolves over only one Hubble time, yielding a simple mechanism whereby relaxation to the Born rule can be suppressed on very large scales. We present numerical simulations illustrating how the expansion of space can cause a retardation of relaxation in the super-Hubble regime. Given these results it is natural to expect a suppression of quantum noise at super-Hubble wavelengths. Such suppression could have taken place in a pre-inflationary era, resulting in a large-scale power deficit in the cosmic microwave background.

Samuel Colin; Antony Valentini

2013-06-07T23:59:59.000Z

392

Statistical Relationships of the Tropical Rainfall Measurement Mission (TRMM) Precipitation and Large-scale Flow  

E-Print Network (OSTI)

The relationship between precipitation and large-flow is important to understand and characterize in the climate system. We examine statistical relationships between the Tropical Rainfall Measurement Mission (TRMM) 3B42 gridded precipitation and large-scale ow variables in the Tropics for 2000{2007. These variables include NCEP/NCAR Re-analysis sea surface temperatures (SSTs), vertical temperature pro files, omega, and moist static energy, as well as Atmospheric Infrared Sounder (AIRS) vertical temperatures and QuikSCAT surface divergence. We perform correlation analysis, empirical orthogonal function analysis, and logistic regression analysis on monthly, pentad, daily and near-instantaneous time scales. Logistic regression analysis is able to incorporate the non-linear nature of precipitation in the relation- ship. Flow variables are interpolated to the 0.25 degrees TRMM 3B42 grid and examined separately for each month to o set the effects of the seasonal cycle. January correlations of NCEP/NCAR Re-analysis SSTs and TRMM 3B42 precipitation have a coherent area of positive correlations in the Western and Central Tropical Pacific on all time scales. These areas correspond with the South Pacific Convergence Zone (SPCZ) and the Inter Tropical Convergence Zone (ITCZ). 500mb omega is negatively correlated with TRMM 3B42 precipitation across the Tropics on all time scales. QuikSCAT divergence correlations with precipitation have a band of weak and noisy correlations along the ITCZ on monthly time scales in January. Moist static energy, calculated from NCEP/NCAR Re-analysis has a large area of negative correlations with precipitation in the Central Tropical Pacific on all four time scales. The first few Empirical Orthogonal Functions (EOFs) of vertical temperature profiles in the Tropical Pacific have similar structure on monthly, pentad, and daily timescales. Logistic regression fit coefficients are large for SST and precipitation in four regions located across the Tropical Pacific. These areas show clear thresholded behavior. Logistic regression results for other variables and precipitation are less clear. The results from SST and precipitation logistic regression analysis indicate the potential usefulness of logistic regression as a non-linear statistic relating precipitation and certain ow variables.

Borg, Kyle

2010-05-01T23:59:59.000Z

393

Understanding the Impact of Large-Scale Penetration of Micro Combined Heat & Power Technologies within Energy Systems  

E-Print Network (OSTI)

increase with the incorporation of additional features such as a hot water storage unit integrated ........................................................................................................ 30 FIGURE 2.2.4: FUEL CELL BASIC OPERATION............................................................................................................ 32 FIGURE 3.1.1: RESIDENTIAL HEATING & ELECTRIC SYSTEM USING A MICRO-CHP UNIT UNDER A HOT

Rudnick, Hugh

394

Large-scale Gadolinium-doped Water Cerenkov Detector for Non-Proliferation  

E-Print Network (OSTI)

Fission events from Special Nuclear Material (SNM), such as highly enriched uranium or plutonium, can produce simultaneous emission of multiple neutrons and high energy gamma-rays. The observation of time correlations between any of these particles is a significant indicator of the presence of fissionable material. Cosmogenic processes can also mimic these types of correlated signals. However, if the background is sufficiently low and fully characterized, significant changes in the correlated event rate in the presence of a target of interest constitutes a robust signature of the presence of SNM. Since fission emissions are isotropic, adequate sensitivity to these multiplicities requires a high efficiency detector with a large solid angle with respect to the target. Water Cerenkov detectors are a cost-effective choice when large solid angle coverage is required. In order to characterize the neutron detection performance of large-scale water Cerenkov detectors, we have designed and built a 3.5 kL water Cerenko...

Sweany, M; Bowden, N S; Dazeley, S; Keefer, G; Svoboda, R; Tripathi, M

2011-01-01T23:59:59.000Z

395

Formation of large-scale structures in ablative Kelvin-Helmholtz instability  

SciTech Connect

In this research, we studied numerically nonlinear evolutions of the Kelvin-Helmholtz instability (KHI) with and without thermal conduction, aka, the ablative KHI (AKHI) and the classical KHI (CKHI). The second order thermal conduction term with a variable thermal conductivity coefficient is added to the energy equation in the Euler equations in the AKHI to investigate the effect of thermal conduction on the evolution of large and small scale structures within the shear layer which separate the fluids with different velocities. The inviscid hyperbolic flux of Euler equation is computed via the classical fifth order weighted essentially nonoscillatory finite difference scheme and the temperature is solved by an implicit fourth order finite difference scheme with variable coefficients in the second order parabolic term to avoid severe time step restriction imposed by the stability of the numerical scheme. As opposed to the CKHI, fine scale structures such as the vortical structures are suppressed from forming in the AKHI due to the dissipative nature of the second order thermal conduction term. With a single-mode sinusoidal interface perturbation, the results of simulations show that the growth of higher harmonics is effectively suppressed and the flow is stabilized by the thermal conduction. With a two-mode sinusoidal interface perturbation, the vortex pairing is strengthened by the thermal conduction which would allow the formation of large-scale structures and enhance the mixing of materials. In summary, our numerical studies show that thermal conduction can have strong influence on the nonlinear evolutions of the KHI. Thus, it should be included in applications where thermal conduction plays an important role, such as the formation of large-scale structures in the high energy density physics and astrophysics.

Wang, L. F. [SMCE, China University of Mining and Technology, Beijing 100083 (China); CAPT, Peking University, Beijing 100871 (China) and LCP, Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China); Department of Mathematics, Hong Kong Baptist University, Kowloon Tong (Hong Kong); Ye, W. H.; He, X. T. [CAPT, Peking University, Beijing 100871 (China) and LCP, Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China); Department of Physics, Zhejiang University, Hangzhou 310027 (China); Don, Wai-Sun [Department of Mathematics, Hong Kong Baptist University, Kowloon Tong (Hong Kong); Sheng, Z. M. [Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, CAS, Beijing 100190 (China) and Department of Physics, Shanghai Jiao Tong University, Shanghai 200240 (China); Li, Y. J. [SMCE, China University of Mining and Technology, Beijing 100083 (China)

2010-12-15T23:59:59.000Z

396

LARGE-SCALE HYDROGEN PRODUCTION FROM NUCLEAR ENERGY USING HIGH TEMPERATURE ELECTROLYSIS  

DOE Green Energy (OSTI)

Hydrogen can be produced from water splitting with relatively high efficiency using high-temperature electrolysis. This technology makes use of solid-oxide cells, running in the electrolysis mode to produce hydrogen from steam, while consuming electricity and high-temperature process heat. When coupled to an advanced high temperature nuclear reactor, the overall thermal-to-hydrogen efficiency for high-temperature electrolysis can be as high as 50%, which is about double the overall efficiency of conventional low-temperature electrolysis. Current large-scale hydrogen production is based almost exclusively on steam reforming of methane, a method that consumes a precious fossil fuel while emitting carbon dioxide to the atmosphere. Demand for hydrogen is increasing rapidly for refining of increasingly low-grade petroleum resources, such as the Athabasca oil sands and for ammonia-based fertilizer production. Large quantities of hydrogen are also required for carbon-efficient conversion of biomass to liquid fuels. With supplemental nuclear hydrogen, almost all of the carbon in the biomass can be converted to liquid fuels in a nearly carbon-neutral fashion. Ultimately, hydrogen may be employed as a direct transportation fuel in a “hydrogen economy.” The large quantity of hydrogen that would be required for this concept should be produced without consuming fossil fuels or emitting greenhouse gases. An overview of the high-temperature electrolysis technology will be presented, including basic theory, modeling, and experimental activities. Modeling activities include both computational fluid dynamics and large-scale systems analysis. We have also demonstrated high-temperature electrolysis in our laboratory at the 15 kW scale, achieving a hydrogen production rate in excess of 5500 L/hr.

James E. O'Brien

2010-08-01T23:59:59.000Z

397

Summary of Large-and Small-Scale Unreinforced Masonry Test Program  

Science Conference Proceedings (OSTI)

A five-year, large- and small-scale, static and dynamic experimental research program, in which more than 700 tests were conducted, has demonstrated that unreinforced masonry infills are more ductile and resist lateral loads more effectively than anticipated by conventional code procedures. The tests were conducted both in the laboratory and on existing structures at the Department of Energy's Y-12 National Security Complex. The experimental data indicate that the combination of a steel frame and infill material efficiently resists lateral loads--the infilling provides significant lateral stiffness while the surrounding frame adds ductility and confinement to the overall system. The results from approximately 25 moderate- and full-scale tests on infills showed that with simulated seismic loads, the frames confined the masonry, and the load-carrying capacity of the infill was considerably above the load that caused initial cracking. This finding was a significant departure from classical code approaches that assumed first cracking to be failure of an unreinforced masonry wall. The experimental program, performed for the US Department of Energy, consisted of the following large-scale tests on infills: in situ airbag pressure testing, shake-table tests, and the application of quasi-static in-plane and out-of-plane drift loads. This paper provides a summary of the overall experimental methodology and results.

Fricke, K.E.

2002-06-28T23:59:59.000Z

398

On the Velocity in the Effective Field Theory of Large Scale Structures  

E-Print Network (OSTI)

We compute the renormalized two-point functions of density, divergence and vorticity of the velocity in the Effective Field Theory of Large Scale Structures. We show that the mass-weighted velocity, as opposed to the volume-weighted velocity, is the natural variable to use. We then prove that, Because of momentum and mass conservation, the corrections from short scales to the large-scale power spectra of density, divergence and vorticity must start at order $k^{4}$. For the vorticity this constitutes the leading term. Exact (approximated) self-similarity of an Einstein-de Sitter ($\\Lambda$CDM) background fixes the time dependence so that the vorticity power spectrum at leading order is uniquely determined, up to a normalization, by the symmetries of the problem. Focusing on density and velocity divergence, we show that the current formulation of the theory does not have enough counterterms to cancel all divergences. At the lowest order, the missing terms are a new stochastic noise and a heat conduction term in the continuity equation. For an Einstein de Sitter universe, we show that all three renormalized cross- and auto-correlation functions have the same structure but different numerical coefficients, which we compute. Using momentum instead of velocity, one can re-absorb the new terms and work with an uncorrected continuity equation but at the cost of having uncancelled IR divergences in equal-time correlators and a more complicated perturbation theory.

Lorenzo Mercolli; Enrico Pajer

2013-07-11T23:59:59.000Z

399

Large-scale functional models of visual cortex for remote sensing  

SciTech Connect

Neuroscience has revealed many properties of neurons and of the functional organization of visual cortex that are believed to be essential to human vision, but are missing in standard artificial neural networks. Equally important may be the sheer scale of visual cortex requiring {approx}1 petaflop of computation. In a year, the retina delivers {approx}1 petapixel to the brain, leading to massively large opportunities for learning at many levels of the cortical system. We describe work at Los Alamos National Laboratory (LANL) to develop large-scale functional models of visual cortex on LANL's Roadrunner petaflop supercomputer. An initial run of a simple region VI code achieved 1.144 petaflops during trials at the IBM facility in Poughkeepsie, NY (June 2008). Here, we present criteria for assessing when a set of learned local representations is 'complete' along with general criteria for assessing computer vision models based on their projected scaling behavior. Finally, we extend one class of biologically-inspired learning models to problems of remote sensing imagery.

Brumby, Steven P [Los Alamos National Laboratory; Kenyon, Garrett [Los Alamos National Laboratory; Rasmussen, Craig E [Los Alamos National Laboratory; Swaminarayan, Sriram [Los Alamos National Laboratory; Bettencourt, Luis [Los Alamos National Laboratory; Landecker, Will [PORTLAND STATE UNIV.

2009-01-01T23:59:59.000Z

400

A membrane-free lithium/polysulfide semi-liquid battery for large-scale energy storage  

E-Print Network (OSTI)

A membrane-free lithium/polysulfide semi-liquid battery for large-scale energy storage Yuan Yang develop a new lithium/ polysulfide (Li/PS) semi-liquid battery for large-scale energy storage, with lithium polysulfide (Li2S8) in ether solvent as a catholyte and metallic lithium as an anode. Unlike

Cui, Yi

Note: This page contains sample records for the topic "large scale chp" 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

BUILDING UNDERWATER AD-HOC NETWORKS AND SENSOR NETWORKS FOR LARGE SCALE REAL-TIME AQUATIC APPLICATIONS  

E-Print Network (OSTI)

BUILDING UNDERWATER AD-HOC NETWORKS AND SENSOR NETWORKS FOR LARGE SCALE REAL-TIME AQUATIC, CT 06269 Gainesville, FL 32611 Abstract-- Large-scale Underwater Ad-hoc Networks (UANET) and Underwater Sensor Networks (UWSN) are novel networking paradigms to explore the uninhabited oceans. How- ever

Cui, Jun-Hong

402

Temperature effect on the small-to-large crossover length-scale of hydrophobic hydration  

E-Print Network (OSTI)

The thermodynamics of hydration changes gradually from entropic for small solutes to enthalpic for large ones. The small-to-large crossover lengthscale of hydrophobic hydration depends on the thermodynamic conditions of the solvent such as temperature, pressure, presence of additives, etc... We attempt to shed some light on the temperature dependence of the crossover lengthscale by using a probabilistic approach to water hydrogen bonding that allows one to obtain an analytic expression for the number of bonds per water molecule as a function of both its distance to a solute and solute radius. Incorporating that approach into the density functional theory, one can examine the solute size effects on its hydration over the entire small-to-large lengthscale range at different temperatures. Knowing the dependence of the hydration free energy on temperature and solute size, one can obtain its enthalpic and entropic contributions as functions of temperature and solute size. These function can provide interesting insight into the temperature dependence of the crossover lengthscale of hydrophobic hydration. The model was applied to the hydration of spherical particles of various radii in water in the temperature range from T=293.15 K to T=333.15 K. The model predictions for the temperature dependence of the hydration free energy of small hydrophobes are consistent with the experimental and simulational data. Three alternative definitions for the small-to-large crossover length-scale of hydrophobic hydration are proposed, and their temperature dependence is obtained. Depending on the definition and temperature, the small-to-large crossover in the hydration mechanism is predicted to occur for hydrophobes of radii from one to several nanometers. Independent of its definition, the crossover length-scale is predicted to decrease with increasing temperature.

Yuri S. Djikaev; Eli Ruckenstein

2013-03-19T23:59:59.000Z

403

Accelerating Satellite Image Based Large-Scale Settlement Detection with GPU  

Science Conference Proceedings (OSTI)

Computer vision algorithms for image analysis are often computationally demanding. Application of such algorithms on large image databases\\---- such as the high-resolution satellite imagery covering the entire land surface, can easily saturate the computational capabilities of conventional CPUs. There is a great demand for vision algorithms running on high performance computing (HPC) architecture capable of processing petascale image data. We exploit the parallel processing capability of GPUs to present a GPU-friendly algorithm for robust and efficient detection of settlements from large-scale high-resolution satellite imagery. Feature descriptor generation is an expensive, but a key step in automated scene analysis. To address this challenge, we present GPU implementations for three different feature descriptors\\-- multiscale Historgram of Oriented Gradients (HOG), Gray Level Co-Occurrence Matrix (GLCM) Contrast and local pixel intensity statistics. We perform extensive experimental evaluations of our implementation using diverse and large image datasets. Our GPU implementation of the feature descriptor algorithms results in speedups of 220 times compared to the CPU version. We present an highly efficient settlement detection system running on a multiGPU architecture capable of extracting human settlement regions from a city-scale sub-meter spatial resolution aerial imagery spanning roughly 1200 sq. kilometers in just 56 seconds with detection accuracy close to 90\\%. This remarkable speedup gained by our vision algorithm maintaining high detection accuracy clearly demonstrates that such computational advancements clearly hold the solution for petascale image analysis challenges.

Patlolla, Dilip Reddy [ORNL; Cheriyadat, Anil M [ORNL; Weaver, Jeanette E [ORNL; Bright, Eddie A [ORNL

2012-01-01T23:59:59.000Z

404

Conceptual Framework and Levels of Abstraction for a Complex Large-Scale System  

SciTech Connect

A conceptual framework and levels of abstraction are created to apply across all potential threats. Bioterrorism is used as a complex example to describe the general framework. Bioterrorism is unlimited with respect to the use of a specific agent, mode of dissemination, and potential target. Because the threat is open-ended, there is a strong need for a common, systemic understanding of attack scenarios related to bioterrorism. In recognition of this large-scale complex problem, systems are being created to define, design and use the proper level of abstraction and conceptual framework in bioterrorism. The wide variety of biological agents and delivery mechanisms provide an opportunity for dynamic scale changes by the linking or interlinking of existing threat components. Concurrent impacts must be separated and evaluated in terms of a given environment and/or ‘abstraction framework.’

Simpson, Mary J.

2005-03-23T23:59:59.000Z

405

MODELING THE DIFFUSION OF MICRO-CHP IN A RESIDENTIAL AREA  

E-Print Network (OSTI)

A thesis presented on the diffusion of micro-CHP in a residential area consisting of houses with multiple owners, currently using condensing boilers. The thesis shows that micro-CHP will not reach 50 % of the market in less than 20 years. Furthermore it analyses the impact of the heat demands, the gas electricity and feedback prices as well as the subsidies on the speed and time of adoption of micro-CHP. ii DECLARATION I declare that: this work has been prepared by myself, all literal or content based quotations are clearly pointed out,

Christian Chemaly; Technische Universität Hamburg; Christian Chemaly

2009-01-01T23:59:59.000Z

406

Disk Accretion Flow Driven by Large-Scale Magnetic Fields: Solutions with Constant Specific Energy  

E-Print Network (OSTI)

(Abridged) We study the dynamical evolution of a stationary, axisymmetric, and perfectly conducting cold accretion disk containing a large-scale magnetic field around a Kerr black hole, trying to understand the relation between accretion and the transportation of angular momentum and energy. We solve the radial momentum equation for solutions corresponding to an accretion flow that starts from a subsonic state at infinity, smoothly passes the fast critical point, then supersonically falls into the horizon of the black hole. The solutions always have the following features: 1) The specific energy of fluid particles remains constant but the specific angular momentum is effectively removed by the magnetic field. 2) At large radii, where the disk motion is dominantly rotational, the energy density of the magnetic field is equipartitioned with the rotational energy density of the disk. 3) Inside the fast critical point, where radial motion becomes important, the ratio of the electromagnetic energy density to the kinetic energy density drops quickly. The results indicate that: 1) Disk accretion does not necessarily imply energy dissipation since magnetic fields do not have to transport or dissipate a lot of energy as they effectively transport angular momentum. 2) When resistivity is small, the large-scale magnetic field is amplified by the shearing rotation of the disk until the magnetic energy density is equipartitioned with the rotational energy density, ending up with a geometrically thick disk. This is in contrast with the evolution of small-scale magnetic fields where if the resistivity is nonzero the magnetic energy density is likely to be equipartitioned with the kinetic energy density associated with local random motions (e.g., turbulence), making a thin Keplerian disk possible.

Li-Xin Li

2002-12-20T23:59:59.000Z

407

Synthesis of ordered large-scale ZnO nanopore arrays  

SciTech Connect

An effective approach is demonstrated for growing ordered large-scale ZnO nanopore arrays through radio-frequency magnetron sputtering deposition on porous alumina membranes (PAMs). The realization of highly ordered hexagonal ZnO nanopore arrays benefits from the unique properties of ZnO (hexagonal structure, polar surfaces, and preferable growth directions) and PAMs (controllable hexagonal nanopores and localized negative charges). Further evidence has been shown through the effects of nanorod size and thermal treatment of PAMs on the yielded morphology of ZnO nanopore arrays. This approach opens the possibility of creating regular semiconducting nanopore arrays for the application of filters, sensors, and templates.

Ding, G.Q.; Shen, W.Z.; Zheng, M.J.; Fan, D.H. [Laboratory of Condensed Matter Spectroscopy and Opto-Electronic Physics, Department of Physics, Shanghai Jiao Tong University, 1954 Hua Shan Road, Shanghai 200030 (China)

2006-03-06T23:59:59.000Z

408

Non-linearity of large-scale structure formation in the Universe  

E-Print Network (OSTI)

In the standard picture of cosmological structure formation, the Universe we see today is evolved under the gravitational instability from tiny random fluctuations. In this talk I discuss the onset of non-linearity in the large scale structure formation of the Universe when the linear perturbation theory break downs. Using 1D Zel'dovich Approximation which provides an exact solution for density evolution, I illustrate two effects: mode spawning and mode merging and their connection to mode coupling. Those mode couplings (quadratic, cubic >...etc.) from gravitational clustering are in fact what the polyspectra (bispectrum, trispectrum...etc.) are meant to measure.

Lung-Yih Chiang

2005-08-17T23:59:59.000Z

409

Non-linearity of large-scale structure formation in the Universe  

E-Print Network (OSTI)

In the standard picture of cosmological structure formation, the Universe we see today is evolved under the gravitational instability from tiny random fluctuations. In this talk I discuss the onset of non-linearity in the large scale structure formation of the Universe when the linear perturbation theory break downs. Using 1D Zel'dovich Approximation which provides an exact solution for density evolution, I illustrate two effects: mode spawning and mode merging and their connection to mode coupling. Those mode couplings (quadratic, cubic >...etc.) from gravitational clustering are in fact what the polyspectra (bispectrum, trispectrum...etc.) are meant to measure.

Chiang, L Y

2005-01-01T23:59:59.000Z

410

Ultra-large distance modification of gravity from Lorentz symmetry breaking at the Planck scale  

E-Print Network (OSTI)

We present an extension of the Randall--Sundrum model in which, due to spontaneous Lorentz symmetry breaking, graviton mixes with bulk vector fields and becomes quasilocalized. The masses of KK modes comprising the four-dimensional graviton are naturally exponentially small. This allows to push the Lorentz breaking scale to as high as a few tenth of the Planck mass. The model does not contain ghosts or tachyons and does not exhibit the van Dam--Veltman--Zakharov discontinuity. The gravitational attraction between static point masses becomes gradually weaker with increasing of separation and gets replaced by repulsion (antigravity) at exponentially large distances.

D. S. Gorbunov; S. M. Sibiryakov

2005-06-08T23:59:59.000Z

411

Development and Analysis of Prognostic Equations for Mesoscale Kinetic Energy and Mesoscale (Subgrid Scale) Fluxes for Large-Scale Atmospheric Models  

Science Conference Proceedings (OSTI)

Mesoscale circulations generated by landscape discontinuities (e.g., sea breezes) are likely to have a significant impact on the hydrologic cycle, the climate, and the weather. However, these processes are not represented in large-scale ...

Roni Avissar; Fei Chen

1993-11-01T23:59:59.000Z

412

Short-Term Basin-Scale Streamflow Forecasting Using Large-Scale Coupled Atmospheric–Oceanic Circulation and Local Outgoing Longwave Radiation  

Science Conference Proceedings (OSTI)

This paper investigates the use of large-scale circulation patterns (El Niño–Southern Oscillation and the equatorial Indian Ocean Oscillation), local outgoing longwave radiation (OLR), and previous streamflow information for short-term (weekly) ...

Rajib Maity; S. S. Kashid

2010-04-01T23:59:59.000Z

413

Environmental Consequences of Large-Scale Deployment of New Energy Systems  

SciTech Connect

This project's scientific goal was to achieve better understanding of where land cover change may mitigate climate change, accounting for both direct climate effects as well as the impacts on the global carbon cycle. As tools for investigating this problem, several models of different complexities were used: an offline land model, a standard coupled climate model, and a model in which coupled carbon-climate interactions were explicitly represented. Results from all model simulations were qualitatively similar: climate mitigation projects involving large-scale re-growth of forests are predicted to be beneficial in mitigating future CO{sub 2}-induced global warming if these are carried out in the tropical latitudes, to be largely ineffectual if conducted in temperate latitudes, and to be counterproductive if implemented at high latitudes. Details of the quantitative differences in these predictions which are exhibited by the chosen climate models also are discussed.

Phillips, T J

2007-02-23T23:59:59.000Z

414

Large scale dynamics of the Persistent Turning Walker model of fish behavior  

E-Print Network (OSTI)

This paper considers a new model of individual displacement, based on fish motion, the so-called Persistent Turning Walker (PTW) model, which involves an Ornstein-Uhlenbeck process on the curvature of the particle trajectory. The goal is to show that its large time and space scale dynamics is of diffusive type, and to provide an analytic expression of the diffusion coefficient. Two methods are investigated. In the first one, we compute the large time asymptotics of the variance of the individual stochastic trajectories. The second method is based on a diffusion approximation of the kinetic formulation of these stochastic trajectories. The kinetic model is a Fokker-Planck type equation posed in an extended phase-space involving the curvature among the kinetic variables. We show that both methods lead to the same value of the diffusion constant. We present some numerical simulations to illustrate the theoretical results.

Pierre Degond; Sébastien Motsch

2007-10-26T23:59:59.000Z

415

Modulational instability, wave breaking and formation of large scale dipoles in the atmosphere  

E-Print Network (OSTI)

In the present Letter we use the Direct Numerical Simulation (DNS) of the Navier-Stokes equation for a two-phase flow (water and air) to study the dynamics of the modulational instability of free surface waves and its contribution to the interaction between ocean and atmosphere. If the steepness of the initial wave is large enough, we observe a wave breaking and the formation of large scale dipole structures in the air. Because of the multiple steepening and breaking of the waves under unstable wave packets, a train of dipoles is released and propagate in the atmosphere at a height comparable with the wave length. The amount of energy dissipated by the breaker in water and air is considered and, contrary to expectations, we observe that the energy dissipation in air is larger than the one in the water. Possible consequences on the wave modelling and on the exchange of aerosols and gases between air and water are discussed.

Iafrati, A; Onorato, M

2012-01-01T23:59:59.000Z

416

Modulational instability, wave breaking and formation of large scale dipoles in the atmosphere  

E-Print Network (OSTI)

In the present Letter we use the Direct Numerical Simulation (DNS) of the Navier-Stokes equation for a two-phase flow (water and air) to study the dynamics of the modulational instability of free surface waves and its contribution to the interaction between ocean and atmosphere. If the steepness of the initial wave is large enough, we observe a wave breaking and the formation of large scale dipole structures in the air. Because of the multiple steepening and breaking of the waves under unstable wave packets, a train of dipoles is released and propagate in the atmosphere at a height comparable with the wave length. The amount of energy dissipated by the breaker in water and air is considered and, contrary to expectations, we observe that the energy dissipation in air is larger than the one in the water. Possible consequences on the wave modelling and on the exchange of aerosols and gases between air and water are discussed.

A. Iafrati; A. Babanin; M. Onorato

2012-08-27T23:59:59.000Z

417

Detecting and mitigating abnormal events in large scale networks: budget constrained placement on smart grids  

Science Conference Proceedings (OSTI)

Several scenarios exist in the modern interconnected world which call for an efficient network interdiction algorithm. Applications are varied, including various monitoring and load shedding applications on large smart energy grids, computer network security, preventing the spread of Internet worms and malware, policing international smuggling networks, and controlling the spread of diseases. In this paper we consider some natural network optimization questions related to the budget constrained interdiction problem over general graphs, specifically focusing on the sensor/switch placement problem for large-scale energy grids. Many of these questions turn out to be computationally hard to tackle. We present a particular form of the interdiction question which is practically relevant and which we show as computationally tractable. A polynomial-time algorithm will be presented for solving this problem.

Santhi, Nandakishore [Los Alamos National Laboratory; Pan, Feng [Los Alamos National Laboratory

2010-10-19T23:59:59.000Z

418

BCS MPI: N new approach i the system software design for large-scale parallel computers  

SciTech Connect

Buffered Co-Scheduled (BCS) MPI proposes a new approach to design the communication libraries for large-scale parallel machines. The emphasis of BCS MPI is on the global coordination of a large number of processes rather than in the traditional optimization of the local performance of a pair of communicating processes. BCS MPI delays the interprocessor communication in order to schedule globally the communication pattern and it is designed on top of a minimal set of collective communication primitives. In this paper we describe a prototype implementation of BCS MDI and its Communication protocols. The experimental results, executed on a set of scientific applications representative of the ASCI workload, show that BCS MPI is only marginally slower than the production-level MPI, but much simpler to implement, debug and analyze.

Fernández, J. C. (Juan C.); Petrini, F. (Fabrizio); Frachtenberg, E. (Eitan)

2003-01-01T23:59:59.000Z

419

BCS MPI: a new approach in the software design for large-scale parallel computers  

SciTech Connect

BCS MPI proposes a new approach to design the communication libraries for large scale parallel machines. The emphasis of BCS MPI is on the global coordination of the potentially large number of processes and in the reduction of the non determinism rather than in the traditional optimization of the local performance of a pair of communicating processes. BCS MPI delays the interprocessor communication in order to schedule globally the communication pattern and it is designed on top of a minimal set of collective communication primitives. In this paper we describe a prototype implementation of BCS MPI and its communication protocols. The experimental results, executed on a set of scientific applications representative of the ASCI workload, show that BCS MPI is only marginally slower than the production-level MPI, but much simpler to implement, debug and analyze.

Peinador, J. F. (Juan Fernandez); Petrini, F. (Fabrizio)

2003-01-01T23:59:59.000Z

420

Environmental Consequences of Large-Scale Deployment of New Energy Systems  

DOE Green Energy (OSTI)

This project's scientific goal was to achieve better understanding of where land cover change may mitigate climate change, accounting for both direct climate effects as well as the impacts on the global carbon cycle. As tools for investigating this problem, several models of different complexities were used: an offline land model, a standard coupled climate model, and a model in which coupled carbon-climate interactions were explicitly represented. Results from all model simulations were qualitatively similar: climate mitigation projects involving large-scale re-growth of forests are predicted to be beneficial in mitigating future CO{sub 2}-induced global warming if these are carried out in the tropical latitudes, to be largely ineffectual if conducted in temperate latitudes, and to be counterproductive if implemented at high latitudes. Details of the quantitative differences in these predictions which are exhibited by the chosen climate models also are discussed.

Phillips, T J

2007-02-23T23:59:59.000Z

Note: This page contains sample records for the topic "large scale chp" 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

Large scale integration based, signal processor-its application and possible evolution  

Science Conference Proceedings (OSTI)

The micro-vector processor (MVP) is designed for applications ranging from expendable single-processor weapons and buoys to large multiprocessor federated systems. Multiple applications, easy reprogrammability, and low-power operation were achieved with an architecture that provides high throughput at moderate clock rates and maximum use of lsi circuts. The MVP software design includes support for both application programming in high-level language and implementation of signal-processing algorithms in a symbolic microprogramming language. These two programmability levels reduce software costs for new applications and for changing requirements. Two examples are used to illustrate MVP applications: cruise missile guidance and a multichannel acoustic beamformer. The MVP architecture, or some close derivative, is considered suitable for reimplementation in very large-scale integration. 2 references.

Harland, W.L.; Carvell, R. Jr.

1981-01-01T23:59:59.000Z

422

The effect of a fifth large-scale space-time dimension on orbital dynamics  

E-Print Network (OSTI)

A model based on simple assumptions about 4-dimensional space-time being closed and isotropic, and embedded in a 5th large-scale dimension, r, representing the radius of curvature of space-time, has been used in an application of Newton's Second Law to describe a system with angular momentum. It has been found that the equations of MOND used to explain the rotation curves of galaxies appear as a limit within this derivation and that there is a universal acceleration constant, ao, with a value, again consistent with that used by MOND. This approach does not require modification of Newtonian dynamics, only its extension into a fifth large-scale dimension. The transition from the classical Newtonian dynamics to the MOND regime emerges naturally and without the introduction of arbitrary fitting functions, if this 5-dimensional model is adopted. The paper also includes the derivation of an effect in 5-dimensional orbital dynamics which is in reasonable agreement with the observed Pioneer Anomaly.

M. B. Gerrard; T. J. Sumner

2006-05-12T23:59:59.000Z

423

pGraph: Efficient Parallel Construction of Large-Scale Protein Sequence Homology Graphs  

Science Conference Proceedings (OSTI)

Detecting sequence homology between protein sequences is a fundamental problem in computational molecular biology, with a pervasive application in nearly all analyses that aim to structurally and functionally characterize protein molecules. While detecting the homology between two protein sequences is relatively inexpensive, detecting pairwise homology for a large number of protein sequences can become computationally prohibitive for modern inputs, often requiring millions of CPU hours. Yet, there is currently no robust support to parallelize this kernel. In this paper, we identify the key characteristics that make this problemparticularly hard to parallelize, and then propose a new parallel algorithm that is suited for detecting homology on large data sets using distributed memory parallel computers. Our method, called pGraph, is a novel hybrid between the hierarchical multiple-master/worker model and producer-consumer model, and is designed to break the irregularities imposed by alignment computation and work generation. Experimental results show that pGraph achieves linear scaling on a 2,048 processor distributed memory cluster for a wide range of inputs ranging from as small as 20,000 sequences to 2,560,000 sequences. In addition to demonstrating strong scaling, we present an extensive report on the performance of the various system components and related parametric studies.

Wu, Changjun; Kalyanaraman, Anantharaman; Cannon, William R.

2012-09-15T23:59:59.000Z

424

First Large Scale Production of Low Radioactivity Argon From Underground Sources  

E-Print Network (OSTI)

We report on the first large-scale production of low radioactivity argon from underground gas wells. Low radioactivity argon is of general interest, in particular for the construction of large scale WIMP dark matter searches and detectors of reactor neutrinos for non-proliferation efforts. Atmospheric argon has an activity of about 1 Bq/kg from the decays of 39Ar; the concentration of 39Ar in the underground argon we are collecting is at least a factor of 100 lower than this value. The argon is collected from a stream of gas from a CO2 well in southwestern Colorado with a Vacuum Pressure Swing Adsorption (VPSA) plant. The gas from the well contains argon at a concentration of 400-600 ppm, and the VPSA plant produces an output stream with an argon concentration at the level of 30,000-50,000 ppm (3-5%) in a single pass. This gas is sent for further processing to Fermilab where it is purified by cryogenic distillation. The argon production rate is presently 0.5 kg/day.

Back, Henning O; Condon, Christopher; de Haas, Ernst; Ford, Richard; Galbiati, Cristiano; Goretti, Augusto; Hohman, Tristan; Inanni, Andrea; Loer, Ben; Montanari, David; Nelson, Allan; Pocar, Andrea

2012-01-01T23:59:59.000Z

425

LARGE-SCALE PRODUCTION OF HYDROGEN BY NUCLEAR ENERGY FOR THE HYDROGEN ECONOMY  

DOE Green Energy (OSTI)

OAK B202 LARGE-SCALE PRODUCTION OF HYDROGEN BY NUCLEAR ENERGY FOR THE HYDROGEN ECONOMY. The ''Hydrogen Economy'' will reduce petroleum imports and greenhouse gas emissions. However, current commercial hydrogen production processes use fossil fuels and releases carbon dioxide. Hydrogen produced from nuclear energy could avoid these concerns. The authors have recently completed a three-year project for the US Department of Energy whose objective was to ''define an economically feasible concept for production of hydrogen, by nuclear means, using an advanced high-temperature nuclear reactor as the energy source''. Thermochemical water-splitting, a chemical process that accomplishes the decomposition of water into hydrogen and oxygen, met this objective. The goal of the first phase of this study was to evaluate thermochemical processes which offer the potential for efficient, cost-effective, large-scale production of hydrogen and to select one for further detailed consideration. The authors selected the Sulfur-Iodine cycle, In the second phase, they reviewed all the basic reactor types for suitability to provide the high temperature heat needed by the selected thermochemical water splitting cycle and chose the helium gas-cooled reactor. In the third phase they designed the chemical flowsheet for the thermochemical process and estimated the efficiency and cost of the process and the projected cost of producing hydrogen. These results are summarized in this paper.

SCHULTZ,KR; BROWN,LC; BESENBRUCH,GE; HAMILTON,CJ

2003-02-01T23:59:59.000Z

426

Mechanism for the suppression of quantum noise at large scales on expanding space  

E-Print Network (OSTI)

We present an exactly-solvable model for the suppression of quantum noise at large scales on expanding space. The suppression arises naturally in the de Broglie-Bohm pilot-wave formulation of quantum theory, according to which the Born probability rule has a dynamical origin. For a scalar field on a radiation-dominated background we construct the exact solution for the time-evolving wave functional and study properties of the associated field trajectories. It is shown that the time evolution of a field mode on expanding space is mathematically equivalent to that of a standard harmonic oscillator with a 'retarded time' that depends on the wavelength of the mode. In the far super-Hubble regime the equivalent oscillator evolves over only one Hubble time, yielding a simple mechanism whereby relaxation to the Born rule can be suppressed on very large scales. We present numerical simulations illustrating how the expansion of space can cause a retardation of relaxation in the super-Hubble regime. Given these results...

Colin, Samuel

2013-01-01T23:59:59.000Z

427

PowerGrid - A Computation Engine for Large-Scale Electric Networks  

Science Conference Proceedings (OSTI)

This Final Report discusses work on an approach for analog emulation of large scale power systems using Analog Behavioral Models (ABMs) and analog devices in PSpice design environment. ABMs are models based on sets of mathematical equations or transfer functions describing the behavior of a circuit element or an analog building block. The ABM concept provides an efficient strategy for feasibility analysis, quick insight of developing top-down design methodology of large systems and model verification prior to full structural design and implementation. Analog emulation in this report uses an electric circuit equivalent of mathematical equations and scaled relationships that describe the states and behavior of a real power system to create its solution trajectory. The speed of analog solutions is as quick as the responses of the circuit itself. Emulation therefore is the representation of desired physical characteristics of a real life object using an electric circuit equivalent. The circuit equivalent has within it, the model of a real system as well as the method of solution. This report presents a methodology of the core computation through development of ABMs for generators, transmission lines and loads. Results of ABMs used for the case of 3, 6, and 14 bus power systems are presented and compared with industrial grade numerical simulators for validation.

Chika Nwankpa

2011-01-31T23:59:59.000Z

428

Testing of Large-Scale ICV Glasses with Hanford LAW Simulant  

SciTech Connect

Preliminary glass compositions for immobilizing Hanford low-activity waste (LAW) by the in-container vitrification (ICV) process were initially fabricated at crucible- and engineering-scale, including simulants and actual (radioactive) LAW. Glasses were characterized for vapor hydration test (VHT) and product consistency test (PCT) responses and crystallinity (both quenched and slow-cooled samples). Selected glasses were tested for toxicity characteristic leach procedure (TCLP) responses, viscosity, and electrical conductivity. This testing showed that glasses with LAW loading of 20 mass% can be made readily and meet all product constraints by a far margin. Glasses with over 22 mass% Na2O can be made to meet all other product quality and process constraints. Large-scale testing was performed at the AMEC, Geomelt Division facility in Richland. Three tests were conducted using simulated LAW with increasing loadings of 12, 17, and 20 mass% Na2O. Glass samples were taken from the test products in a manner to represent the full expected range of product performance. These samples were characterized for composition, density, crystalline and non-crystalline phase assemblage, and durability using the VHT, PCT, and TCLP tests. The results, presented in this report, show that the AMEC ICV product with meets all waste form requirements with a large margin. These results provide strong evidence that the Hanford LAW can be successfully vitrified by the ICV technology and can meet all the constraints related to product quality. The economic feasibility of the ICV technology can be further enhanced by subsequent optimization.

Hrma, Pavel R.; Kim, Dong-Sang; Vienna, John D.; Matyas, Josef; Smith, Donald E.; Schweiger, Michael J.; Yeager, John D.

2005-03-01T23:59:59.000Z

429

A Topological Framework for the Interactive Exploration of Large Scale Turbulent Combustion  

SciTech Connect

The advent of highly accurate, large scale volumetric simulations has made data analysis and visualization techniques an integral part of the modern scientific process. To develop new insights from raw data, scientists need the ability to define features of interest in a flexible manner and to understand how changes in the feature definition impact the subsequent analysis of the data. Therefore, simply exploring the raw data is not sufficient. This paper presents a new topological framework for the analysis of large scale, time-varying, turbulent combustion simulations. It allows the scientists to explore interactively the complete parameter space of fuel consumption thresholds for an entire time-dependent combustion simulation. By computing augmented merge trees and their corresponding data segmentations, the system allows the user complete flexibility to segment, select, and track burning cells through time thanks to a linked view interface. We developed this technique in the context of low-swirl turbulent pre-mixed flame simulation analysis, where the topological abstractions enable an efficient tracking through time of the burning cells and provide new qualitative and quantitative insights into the dynamics of the combustion process.

Bremer, P; Weber, G; Tierny, J; Pascucci, V; Day, M; Bell, J

2009-09-29T23:59:59.000Z

430

Parallel supercomputing: Advanced methods, algorithms, and software for large-scale linear and nonlinear problems  

SciTech Connect

The program outlined here is directed to research on methods, algorithms, and software for distributed parallel supercomputers. Of particular interest are finite element methods and finite difference methods together with sparse iterative solution schemes for scientific and engineering computations of very large-scale systems. Both linear and nonlinear problems will be investigated. In the nonlinear case, applications with bifurcation to multiple solutions will be considered using continuation strategies. The parallelizable numerical methods of particular interest are a family of partitioning schemes embracing domain decomposition, element-by-element strategies, and multi-level techniques. The methods will be further developed incorporating parallel iterative solution algorithms with associated preconditioners in parallel computer software. The schemes will be implemented on distributed memory parallel architectures such as the CRAY MPP, Intel Paragon, the NCUBE3, and the Connection Machine. We will also consider other new architectures such as the Kendall-Square (KSQ) and proposed machines such as the TERA. The applications will focus on large-scale three-dimensional nonlinear flow and reservoir problems with strong convective transport contributions. These are legitimate grand challenge class computational fluid dynamics (CFD) problems of significant practical interest to DOE. The methods developed and algorithms will, however, be of wider interest.

Carey, G.F.; Young, D.M.

1993-12-31T23:59:59.000Z

431

Combined Climate and Carbon-Cycle Effects of Large-Scale Deforestation  

DOE Green Energy (OSTI)

The prevention of deforestation and promotion of afforestation have often been cited as strategies to slow global warming. Deforestation releases CO{sub 2} to the atmosphere, which exerts a warming influence on Earth's climate. However, biophysical effects of deforestation, which include changes in land surface albedo, evapotranspiration, and cloud cover also affect climate. Here we present results from several large-scale deforestation experiments performed with a three-dimensional coupled global carbon-cycle and climate model. These are the first such simulations performed using a fully three-dimensional model representing physical and biogeochemical interactions among land, atmosphere, and ocean. We find that global-scale deforestation has a net cooling influence on Earth's climate, since the warming carbon-cycle effects of deforestation are overwhelmed by the net cooling associated with changes in albedo and evapotranspiration. Latitude-specific deforestation experiments indicate that afforestation projects in the tropics would be clearly beneficial in mitigating global-scale warming, but would be counterproductive if implemented at high latitudes and would offer only marginal benefits in temperate regions. While these results question the efficacy of mid- and high-latitude afforestation projects for climate mitigation, forests remain environmentally valuable resources for many reasons unrelated to climate.

Bala, G; Caldeira, K; Wickett, M; Phillips, T J; Lobell, D B; Delire, C; Mirin, A

2006-10-17T23:59:59.000Z

432

Consistency test of general relativity from large scale structure of the Universe  

E-Print Network (OSTI)

We construct a consistency test of General Relativity (GR) on cosmological scales. This test enables us to distinguish between the two alternatives to explain the late-time accelerated expansion of the universe, that is, dark energy models based on GR and modified gravity models without dark energy. We derive the consistency relation in GR which is written only in terms of observables - the Hubble parameter, the density perturbations, the peculiar velocities and the lensing potential. The breakdown of this consistency relation implies that the Newton constant which governs large-scale structure is different from that in the background cosmology, which is a typical feature in modified gravity models. We propose a method to perform this test by reconstructing the weak lensing spectrum from measured density perturbations and peculiar velocities. This reconstruction relies on Poisson's equation in GR to convert the density perturbations to the lensing potential. Hence any inconsistency between the reconstructed lensing spectrum and the measured lensing spectrum indicates the failure of GR on cosmological scales. The difficulties in performing this test using actual observations are discussed.

Yong-Seon Song; Kazuya Koyama

2008-02-26T23:59:59.000Z

433

Distributed Generation as Combined Heat and Power (DG-CHP) (New...  

Open Energy Info (EERE)

Edit with form History Share this page on Facebook icon Twitter icon Distributed Generation as Combined Heat and Power (DG-CHP) (New York) This is the approved revision of...

434

Hybrid CH&P PON-11-507 Page 1 of 1  

E-Print Network (OSTI)

Highly Efficient Production of Electricity and Syngas Using a Natural-Gas Fuel Cell Low Emissions Exhaust with Coal- and Biomass-Derived Syngas Waste Vegetable Oil Driven CHP for Fast Food Restaurants #12;

435

Hybrid CH&P PON-11-507 Page 1 of 1  

E-Print Network (OSTI)

Hybrid CH&P PON-11-507 Page 1 of 1 ATTACHMENT I Prevailing Wage Special Condition Template Public this Agreement, the Recipient shall submit to the Energy Commission a certificate signed by the Recipient and all

436

Connecting the Physical Properties of Galaxies with the Overdensity and Tidal Shear of the Large-Scale Environment  

E-Print Network (OSTI)

We have examined the correlations between the large-scale environment of galaxies and their physical properties, using a sample of 28,354 nearby galaxies drawn from the Sloan Digital Sky Survey, and the large-scale tidal field reconstructed in real space from the 2Mass Redshift Survey and smoothed over a radius of $\\sim 6 h^{-1}$Mpc. The large-scale environment is expressed in terms of the overdensity, the ellipticity of the shear and the type of the large-scale structure. The physical properties analyzed include $r$-band absolute magnitude $M_{^{0.1}r}$, stellar mass $M_\\ast$, $g-r$ colour, concentration parameter $R_{90}/R_{50}$ and surface stellar mass density $\\mu_\\ast$. Both luminosity and stellar mass are found to be statistically linked to the large-scale environment, regardless of how the environment is quantified. More luminous (massive) galaxies reside preferentially in the regions with higher densities, lower ellipticities and halo-like structures. At fixed luminosity, the large-scale overdensity depends strongly on parameters related to the recent star formation history, that is colour and D(4000), but is almost independent of the structural parameters $R_{90}/R_{50}$ and $\\mu_\\ast$. All the physical properties are statistically linked to the shear of the large-scale environment even when the large-scale density is constrained to a narrow range. This statistical link has been found to be most significant in the quasi-linear regions where the large-scale density approximates to an order of unity, but no longer significant in highly nonlinear regimes with $\\delta_{\\rm LS}\\gg 1$.

Jounghun Lee; Cheng Li

2008-03-12T23:59:59.000Z

437

Large-scale Gadolinium-doped Water Cerenkov Detector for Non-Proliferation  

E-Print Network (OSTI)

Fission events from Special Nuclear Material (SNM), such as highly enriched uranium or plutonium, can produce simultaneous emission of multiple neutrons and high energy gamma-rays. The observation of time correlations between any of these particles is a significant indicator of the presence of fissionable material. Cosmogenic processes can also mimic these types of correlated signals. However, if the background is sufficiently low and fully characterized, significant changes in the correlated event rate in the presence of a target of interest constitutes a robust signature of the presence of SNM. Since fission emissions are isotropic, adequate sensitivity to these multiplicities requires a high efficiency detector with a large solid angle with respect to the target. Water Cerenkov detectors are a cost-effective choice when large solid angle coverage is required. In order to characterize the neutron detection performance of large-scale water Cerenkov detectors, we have designed and built a 3.5 kL water Cerenkov-based gamma-ray and neutron detector, and modeled the detector response in Geant4 [1]. We report the position-dependent neutron detection efficiency and energy response of the detector, as well as the basic characteristics of the simulation.

M. Sweany; A. Bernstein; N. S. Bowden; S. Dazeley; G. Keefer; R. Svoboda; M. Tripathi

2011-05-11T23:59:59.000Z

438

Large-scale three-dimensional geothermal reservoir simulation on PCs  

DOE Green Energy (OSTI)

TOUGH2, Lawrence Berkeley Laboratory`s general purpose simulator for mass and heat flow and transport was enhanced with the addition of a set of preconditioned conjugate gradient solvers and ported to a PC. The code was applied to a number of large 3-D geothermal reservoir problems with up to 10,000 grid blocks. Four test problems were investigated. The first two involved a single-phase liquid system, and a two-phase system with regular Cartesian grids. The last two involved a two-phase field problem with irregular gridding with production from and injection into a single porosity reservoir, and a fractured reservoir. The code modifications to TOUGH2 and its setup in the PC environment are described. Algorithms suitable for solving large matrices that are generally non-symmetric and non-positive definite are reviewed. Computational work per time step and CPU time requirements are reported as function of problem size. The excessive execution time and storage requirements of the direct solver in TOUGH2 limits the size of manageable 3-D reservoir problems to a few hundred grid blocks. The conjugate gradient solvers significantly reduced the execution time and storage requirements making possible the execution of considerably larger problems (10,000 + grid blocks). It is concluded that the current PCs provide an economical platform for running large-scale geothermal field simulations that just a few years ago could only be executed on mainframe computers.

Antunez, E.; Moridis, G.; Pruess, K.

1994-01-01T23:59:59.000Z

439

In-situ sampling of a large-scale particle simulation for interactive visualization and analysis  

SciTech Connect

We propose storing a random sampling of data from large scale particle simulations, such as the Roadrunner Universe MC{sup 3} cosmological simulation, to be used for interactive post-analysis and visualization. Simulation data generation rates will continue to be far greater than storage bandwidth rates and other limiting technologies by many orders of magnitude. This implies that only a very small fraction of data generated by the simulation can ever be stored and subsequently post-analyzed. The limiting technology in this situation is analogous to the problem in many population surveys: there aren't enough human resources to query a large population. To cope with the lack of resources, statistical sampling techniques are used to create a representative data set of a large population. Mirroring that situation, we propose to store a simulation-time random sampling of the particle data to cope with the bOlllenecks and support interactive, exploratory post-analysis. The particle samples are immediately stored in a level-ol-detail format for post-visualization and analysis, which amortizes the cost of post-processing for interactive visualization. Additionally, we incorporate a system for recording and visualizing sample approximation error information for confidence and importance highlighting.

Woodring, Jonathan L [Los Alamos National Laboratory; Ahrens, James P [Los Alamos National Laboratory; Heitmann, Katrin [Los Alamos National Laboratory

2010-12-09T23:59:59.000Z

440

Large-scale three-dimensional geothermal reservoir simulation on PCs  

Science Conference Proceedings (OSTI)

TOUGH2, Lawrence Berkeley Laboratory's general purpose simulator for mass and heat flow and transport was enhanced with the addition of a set of preconditioned conjugate gradient solvers and ported to a PC. The code was applied to a number of large 3-D geothermal reservoir problems with up to 10,000 grid blocks. Four test problems were investigated. The first two involved a single-phase liquid system, and a two-phase system with regular Cartesian grids. The last two involved a two-phase field problem with irregular gridding with production from and injection into a single porosity reservoir, and a fractured reservoir. The code modifications to TOUGH2 and its setup in the PC environment are described. Algorithms suitable for solving large matrices that are generally non-symmetric and non-positive definite are reviewed. Computational work per time step and CPU time requirements are reported as function of problem size. The excessive execution time and storage requirements of the direct solver in TOUGH2 limits the size of manageable 3-D reservoir problems to a few hundred grid blocks. The conjugate gradient solvers significantly reduced the execution time and storage requirements making possible the execution of considerably larger problems (10,000+ grid blocks). It is concluded that the current PCs provide an economical platform for running large-scale geothermal field simulations that just a few years ago could only be executed on mainframe computers.

Antunez, Emilio; Moridis, George; Pruess, Karsten

1994-01-20T23:59:59.000Z

Note: This page contains sample records for the topic "large scale chp" 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

A Preliminary Study on Designing Combined Heat and Power (CHP) System for the University Environment  

E-Print Network (OSTI)

Combined heat and power (CHP) systems are an evolving technology that is at the front of the energy conservation movement. With the reduction in energy consumption and green house gas emissions, CHP systems are improving the efficiency of power generation. Our goal for this research is to develop a specification for a CHP System that will improve the University of Louisiana at Lafayette’s operating efficiency. This system will reduce the operating cost of the university and provide reliable, clean energy to the College of Engineering and surrounding buildings. If this system is implemented correctly, it has the ability to meet the economic and reliability needs of the university. CHP systems are the combination of various forms of equipment to meet the electrical and thermal needs from one single fuel source. Major steps involved in the development of a CHP system including data collection and analysis, system calculations and system specifications will be discussed. This research also examines the barriers that CHP systems encounter with environmental regulations and grid interconnection.

Kozman, T. A.; Reynolds, C. M.; Lee, J.

2008-01-01T23:59:59.000Z

442

Regional climate consequences of large-scale cool roof and photovoltaic  

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

climate consequences of large-scale cool roof and photovoltaic climate consequences of large-scale cool roof and photovoltaic array deployment Title Regional climate consequences of large-scale cool roof and photovoltaic array deployment Publication Type Journal Article Year of Publication 2011 Authors Millstein, Dev, and Surabi Menon Journal Environmental Research Letters Volume 6 Start Page 1 Pagination 9 Date Published 07/2011 Keywords co2 offsets, cool roofs, photovoltaics, radiative forcing, urban environment Abstract Modifications to the surface albedo through the deployment of cool roofs and pavements (reflective materials) and photovoltaic arrays (low reflection) have the potential to change radiative forcing, surface temperatures, and regional weather patterns. In this work we investigate the regional climate and radiative effects of modifying surface albedo to mimic massive deployment of cool surfaces (roofs and pavements) and, separately, photovoltaic arrays across the United States. We use a fully coupled regional climate model, the Weather Research and Forecasting (WRF) model, to investigate feedbacks between surface albedo changes, surface temperature, precipitation and average cloud cover. With the adoption of cool roofs and pavements, domain-wide annual average outgoing radiation increased by 0.16 ± 0.03 W m-2 (mean ± 95% C.I.) and afternoon summertime temperature in urban locations was reduced by 0.11-0.53 "C, although some urban areas showed no statistically significant temperature changes. In response to increased urban albedo, some rural locations showed summer afternoon temperature increases of up to +0.27 "C and these regions were correlated with less cloud cover and lower precipitation. The emissions offset obtained by this increase in outgoing radiation is calculated to be 3.3 ± 0.5 Gt CO2 (mean ± 95% C.I.). The hypothetical solar arrays were designed to be able to produce one terawatt of peak energy and were located in the Mojave Desert of California. To simulate the arrays, the desert surface albedo was darkened, causing local afternoon temperature increases of up to +0.4 "C. Due to the solar arrays, local and regional wind patterns within a 300 km radius were affected. Statistically significant but lower magnitude changes to temperature and radiation could be seen across the domain due to the introduction of the solar arrays. The addition of photovoltaic arrays caused no significant change to summertime outgoing radiation when averaged over the full domain, as interannual variation across the continent obscured more consistent local forcing.

443

Regional climate consequences of large-scale cool roof and photovoltaic  

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

climate consequences of large-scale cool roof and photovoltaic climate consequences of large-scale cool roof and photovoltaic array deployment Title Regional climate consequences of large-scale cool roof and photovoltaic array deployment Publication Type Journal Article Year of Publication 2011 Authors Millstein, Dev, and Surabi Menon Journal Environmental Research Letters Volume 6 Start Page 1 Pagination 9 Date Published 07/2011 Keywords co2 offsets, cool roof, photovoltaics, radiative forcing, urban environment Abstract Modifications to the surface albedo through the deployment of cool roofs and pavements (reflective materials) and photovoltaic arrays (low reflection) have the potential to change radiative forcing, surface temperatures, and regional weather patterns. In this work we investigate the regional climate and radiative effects of modifying surface albedo to mimic massive deployment of cool surfaces (roofs and pavements) and, separately, photovoltaic arrays across the United States. We use a fully coupled regional climate model, the Weather Research and Forecasting (WRF) model, to investigate feedbacks between surface albedo changes, surface temperature, precipitation and average cloud cover. With the adoption of cool roofs and pavements, domain-wide annual average outgoing radiation increased by 0.16 ± 0.03 W m-2 (mean ± 95% C.I.) and afternoon summertime temperature in urban locations was reduced by 0.11-0.53 "C, although some urban areas showed no statistically significant temperature changes. In response to increased urban albedo, some rural locations showed summer afternoon temperature increases of up to +0.27 "C and these regions were correlated with less cloud cover and lower precipitation. The emissions offset obtained by this increase in outgoing radiation is calculated to be 3.3 ± 0.5 Gt CO2 (mean ± 95% C.I.). The hypothetical solar arrays were designed to be able to produce one terawatt of peak energy and were located in the Mojave Desert of California. To simulate the arrays, the desert surface albedo was darkened, causing local afternoon temperature increases of up to +0.4 "C. Due to the solar arrays, local and regional wind patterns within a 300 km radius were affected. Statistically significant but lower magnitude changes to temperature and radiation could be seen across the domain due to the introduction of the solar arrays. The addition of photovoltaic arrays caused no significant change to summertime outgoing radiation when averaged over the full domain, as interannual variation across the continent obscured more consistent local forcing.

444

ANL/ALCF/ESP-13/14 NAMD - The Engine for Large-Scale Classical MD  

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

4 4 NAMD - The Engine for Large-Scale Classical MD Simulations of Biomolecular Systems Based on a Polarizable Force Field ALCF-2 Early Science Program Technical Report Argonne Leadership Computing Facility About Argonne National Laboratory Argonne is a U.S. Department of Energy laboratory managed by UChicago Argonne, LLC under contract DE-AC02-06CH11357. The Laboratory's main facility is outside Chicago, at 9700 South Cass Avenue, Argonne, Illinois 60439. For information about Argonne and its pioneering science and technology programs, see www.anl.gov. Availability of This Report This report is available, at no cost, at http://www.osti.gov/bridge. It is also available on paper to the U.S. Department of Energy and its contractors, for a processing fee, from:

445

A review of large-scale LNG spills : experiment and modeling.  

SciTech Connect

The prediction of the possible hazards associated with the storage and transportation of liquefied natural gas (LNG) by ship has motivated a substantial number of experimental and analytical studies. This paper reviews the experimental and analytical work performed to date on large-scale spills of LNG. Specifically, experiments on the dispersion of LNG, as well as experiments of LNG fires from spills on water and land are reviewed. Explosion, pool boiling, and rapid phase transition (RPT) explosion studies are described and discussed, as well as models used to predict dispersion and thermal hazard distances. Although there have been significant advances in understanding the behavior of LNG spills, technical knowledge gaps to improve hazard prediction are identified. Some of these gaps can be addressed with current modeling and testing capabilities. A discussion of the state of knowledge and recommendations to further improve the understanding of the behavior of LNG spills on water is provided.

Luketa-Hanlin, Anay Josephine

2005-04-01T23:59:59.000Z

446

ESS 2012 Peer Review - Nitrogen-Oxygen Battery for Large Scale Energy Storage - Frank Delnick, SNL  

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

US DOE Energy Storage Systems Research Program US DOE Energy Storage Systems Research Program Peer Review, Washington, DC Sept. 26-28, 2012 Frank Delnick, David Ingersoll, Karen Waldrip, Peter Feibelman Nitrogen/Oxygen Battery A Transformational Architecture for Large Scale Energy Storage Power Sources Technology Group Sandia National Laboratories Albuquerque, NM SAND2012-7881P N 2 /O 2 Battery Project Overview  Air/Air battery.  N 2 electrochemistry enables the redefinition of a gas (diffusion) electrode and the three phase interface.  Operated as redox flow battery.  Provide a very high energy density, very low cost, environmentally benign electrochemical platform for load leveling and for grid-integrated storage of energy generated by wind, solar and other sustainable but intermittent sources.

447

Large-scale three-dimensional geothermal reservoir simulation on small computer systems  

DOE Green Energy (OSTI)

The performance of TOUGH2, Lawrence Berkeley Laboratory`s general purpose simulator for mass and heat flow and transport enhanced with the addition of a set of preconditioned conjugate gradient solvers, was tested on three PCs (486-33, 486-66, Pentium-90), a MacIntosh Quadra 800, and a workstation IBM RISC 6000. A two-phase, single porosity, 3-D geothermal reservoir model with 1,411 irregular grid blocks, with production from and injection into the reservoir was used as the test model. The code modifications to TOUGH2 and its setup in each machine environment are described. Computational work per time step and CPU time requirements are reported for each of the machines used. It is concluded that the current PCs provide the best price/performance platform for running large-scale geothermal field simulations that just a few years ago could only be executed on mainframe computers and high-end workstations.

Antunez, E.; Moridis, G.; Pruess, K.

1995-05-01T23:59:59.000Z

448

A characterization of the diffuse Galactic emissions at large angular scales using the Tenerife data  

E-Print Network (OSTI)

The Anomalous microwave emission (AME) has been proved to be an important component of the Galactic diffuse emission in the range from 20 to 60 GHz. To discriminate between different models of AME low frequency microwave data from 10 to 20 GHz are needed. We present here a re-analysis of published and un-published Tenerife data from 10 to 33 GHz at large angular scales (from 5 to 15 degrees). We cross-correlate the Tenerife data to templates of the main Galactic diffuse emissions: synchrotron, free-free and thermal dust. We find evidence of dust correlated emission in the Tenerife data that could be explained as spinning dust grain emission.

Macías-Pérez, J F; Watson, R; Gutierrez, C M; Rebolo, R

2013-01-01T23:59:59.000Z

449

Large scale fluctuations and dynamics of the Bullard - von K\\'arm\\'an dynamo  

E-Print Network (OSTI)

A synthetic fluid dynamo built in the spirit of the Bullard device [E. C. Bullard, Proc. Camb. Phil. Soc., 51, 744 (1955)] is investigated. It is a two-step dynamo in which one process stems from the fluid turbulence, while the other part is an alpha effect achieved by a linear amplification of currents in external coils [M. Bourgoin et al., New J. Phys., 8, 329 (2006)]. Modifications in the forcing are introduced in order to change the dynamics of the flow, and hence the dynamo behavior. Some features, such as on-off intermittency at onset of dynamo action, are very robust. Large scales fluctuations have a significant impact on the resulting dynamo, in particular in the observation of magnetic field reversals.

Verhille, Gautier; Fanjat, Grégory; Volk, Romain; Bourgoin, Mickael; Pinton, Jean-François

2009-01-01T23:59:59.000Z

450

Computation in Large-Scale Scientific and Internet Data Applications is a Focus of MMDS 2010  

E-Print Network (OSTI)

The 2010 Workshop on Algorithms for Modern Massive Data Sets (MMDS 2010) was held at Stanford University, June 15--18. The goals of MMDS 2010 were (1) to explore novel techniques for modeling and analyzing massive, high-dimensional, and nonlinearly-structured scientific and Internet data sets; and (2) to bring together computer scientists, statisticians, applied mathematicians, and data analysis practitioners to promote cross-fertilization of ideas. MMDS 2010 followed on the heels of two previous MMDS workshops. The first, MMDS 2006, addressed the complementary perspectives brought by the numerical linear algebra and theoretical computer science communities to matrix algorithms in modern informatics applications; and the second, MMDS 2008, explored more generally fundamental algorithmic and statistical challenges in modern large-scale data analysis.

Mahoney, Michael W

2010-01-01T23:59:59.000Z

451

Large parallel and perpendicular electric fields on electron spatial scales in the terrestrial bow shock  

E-Print Network (OSTI)

Large parallel ($\\leq$ 100 mV/m) and perpendicular ($\\leq$ 600 mV/m) electric fields were measured in the Earth's bow shock by the vector electric field experiment on the Polar satellite. These are the first reported direct measurements of parallel electric fields in a collisionless shock. These fields exist on spatial scales comparable to or less than the electron skin depth (a few kilometers) and correspond to magnetic field-aligned potentials of tens of volts and perpendicular potentials up to a kilovolt. The perpendicular fields are amongst the largest ever measured in space, with energy densities of $\\epsilon_0 E^2/ n k_b T_e$ of order 10%. The measured parallel electric field implies that the electrons can be demagnetized, which may result in stochastic (rather than coherent) electron heating.

S. D. Bale; F. S. Mozer

2007-03-08T23:59:59.000Z

452

Improving Performance of Power Systems with Large-scale Variable Generation Additions  

Science Conference Proceedings (OSTI)

A power system with large-scale renewable resources, like wind and solar generation, creates significant challenges to system control performance and reliability characteristics because of intermittency and uncertainties associated with variable generation. It is important to quantify these uncertainties, and then incorporate this information into decision-making processes and power system operations. This paper presents three approaches to evaluate the flexibility needed from conventional generators and other resources in the presence of variable generation as well as provide this flexibility from a non-traditional resource – wide area energy storage system. These approaches provide operators with much-needed information on the likelihood and magnitude of ramping and capacity problems, and the ability to dispatch available resources in response to such problems.

Makarov, Yuri V.; Etingov, Pavel V.; Samaan, Nader A.; Lu, Ning; Ma, Jian; Subbarao, Krishnappa; Du, Pengwei; Kannberg, Landis D.

2012-07-22T23:59:59.000Z

453

Large scale shell model calculations for even-even $^{62-66}$Fe isotopes  

E-Print Network (OSTI)

The recently measured experimental data of Legnaro National Laboratories on neutron rich even isotopes of $^{62-66}$Fe with A=62,64,66 have been interpreted in the framework of large scale shell model. Calculations have been performed with a newly derived effective interaction GXPF1A in full $\\it{fp}$ space without truncation. The experimental data is very well explained for $^{62}$Fe, satisfactorily reproduced for $^{64}$Fe and poorly fitted for $^{66}$Fe. The increasing collectivity reflected in experimental data when approaching N=40 is not reproduced in calculated values. This indicates that whereas the considered valence space is adequate for $^{62}$Fe, inclusion of higher orbits from $\\it{sdg}$ shell is required for describing $^{66}$Fe.

P. C. Srivastava; I. Mehrotra

2009-07-23T23:59:59.000Z

454

Large scale test simulations using the Virtual Environment for Test Optimization (VETO)  

SciTech Connect

The Virtual Environment for Test Optimization (VETO) is a set of simulation tools under development at Sandia to enable test engineers to do computer simulations of tests. The tool set utilizes analysis codes and test information to optimize design parameters and to provide an accurate model of the test environment which aides in the maximization of test performance, training, and safety. Previous VETO effort has included the development of two structural dynamics simulation modules that provide design and optimization tools for modal and vibration testing. These modules have allowed test engineers to model and simulate complex laboratory testing, to evaluate dynamic response behavior, and to investigate system testability. Further development of the VETO tool set will address the accurate modeling of large scale field test environments at Sandia. These field test environments provide weapon system certification capabilities and have different simulation requirements than those of laboratory testing.

Klenke, S.E.; Heffelfinger, S.R.; Bell, H.J.; Shierling, C.L.

1997-10-01T23:59:59.000Z

455

Volcanic Eruptions, Large-Scale Modes in the Northern Hemisphere, and the El Niño–Southern Oscillation  

Science Conference Proceedings (OSTI)

The author analyzes the impact of 13 major stratospheric aerosol producing volcanic eruptions since 1870 on the large-scale variability modes of sea level pressure in the Northern Hemisphere winter. The paper focuses on the Arctic Oscillation (AO)...

Bo Christiansen

2008-03-01T23:59:59.000Z

456

The Association of Large-Scale Climate Variability and Teleconnections on Wind Energy Resource over Europe and its Intermittency  

E-Print Network (OSTI)

In times of increasing importance of wind power in the world’s energy mix, this study focuses on a better understanding of the influences of large-scale climate variability on wind power resource over Europe. The impact ...

Kriesche, Pascal

457

A Poisson Regression Index for Tropical Cyclone Genesis and the Role of Large-Scale Vorticity in Genesis  

Science Conference Proceedings (OSTI)

A Poisson regression between the observed climatology of tropical cyclogenesis (TCG) and large-scale climate variables is used to construct a TCG index. The regression methodology is objective and provides a framework for the selection of the ...

Michael K. Tippett; Suzana J. Camargo; Adam H. Sobel

2011-05-01T23:59:59.000Z

458

Influence of Large-Scale Flow Regimes on Cool-Season Precipitation in the Northeastern United States  

Science Conference Proceedings (OSTI)

The influence of large-scale flow regimes on cool-season (November–April) northeastern U.S. (Northeast) precipitation is investigated for the period 1948–2003 from statistical and synoptic perspectives. These perspectives are addressed through (i)...

Heather M. Archambault; Lance F. Bosart; Daniel Keyser; Anantha R. Aiyyer

2008-08-01T23:59:59.000Z

459

On the Effects of Large-Scale Environment and Surface Types on Convective Cloud Characteristics over Darwin, Australia  

Science Conference Proceedings (OSTI)

Two seasons of Darwin, Australia, C-band polarimetric (CPOL) research radar, radiosoundings, and lightning data are examined to study the relative influence of the large-scale atmospheric regimes and the underlying surface types on tropical ...

Vickal V. Kumar; Alain Protat; Peter T. May; Christian Jakob; Guillaume Penide; Sushil Kumar; Laura Davies

2013-04-01T23:59:59.000Z

460

Interannual Variability of Rhine River Streamflow and Its Relationship with Large-Scale Anomaly Patterns in Spring and Autumn  

Science Conference Proceedings (OSTI)

Interannual-to-decadal variability of Rhine River streamflow and their relationship with large-scale climate anomaly patterns for spring [March–May (MAM)] and autumn [September–November (SON)] are investigated through a statistical analysis of ...

Monica Ionita; Gerrit Lohmann; Norel Rimbu; Silvia Chelcea

2012-02-01T23:59:59.000Z

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


461

The Role of the state in large-scale hydropower development perspectives from Chile, Ecuador, and Perú  

E-Print Network (OSTI)

In recent years, governments in South America have turned to large-scale hydropower as a cost-effective way to improve livelihoods while addressing the energy 'trilemma': ensuring that future energy technologies provide ...

Zambrano-Barragán, Patricio Xavier

2012-01-01T23:59:59.000Z

462

Generation of acoustic-gravity waves in ionospheric HF heating experiments : simulating large-scale natural heat sources  

E-Print Network (OSTI)

In this thesis, we investigate the potential role played by large-scale anomalous heat sources (e.g. prolonged heat wave events) in generating acoustic-gravity waves (AGWs) that might trigger widespread plasma turbulence ...

Pradipta, Rezy

2012-01-01T23:59:59.000Z

463

Underwater photomosaic system $40,000 Sandin is working to develop a new tool to take large-scale  

E-Print Network (OSTI)

Underwater photomosaic system $40,000 Sandin is working to develop a new tool to take large-scale photographs of the underwater environment. The effort comes in capturing many hi-resolution images

Russell, Lynn

464

Comparison between the Large-Scale Environments of Moderate and Intense Precipitating Systems in the Mediterranean Region  

Science Conference Proceedings (OSTI)

A characterization of the large-scale environment associated with precipitating systems in the Mediterranean region, based mainly on NOAA-16 Advanced Microwave Sounding Unit (AMSU) observations from 2001 to 2007, is presented. Channels 5, 7, and ...

Beatriz M. Funatsu; Chantal Claud; Jean-Pierre Chaboureau

2009-11-01T23:59:59.000Z

465

The Role of Large-Scale Atmospheric Circulation in the Relationship between Tropical Convection and Sea Surface Temperature  

Science Conference Proceedings (OSTI)

In this paper, the authors study the influence of the large-scale atmospheric circulation on the relationship between sea surface temperature (SST) and tropical convection inferred from outgoing longwave radiation (OLR). They find that under ...

K-M. Lau; H-T. Wu; S. Bony

1997-03-01T23:59:59.000Z

466

Copyright 2013 IEEE. Reprinted, with permission from: CERTS Microgrid Demonstration with Large-Scale Energy Storage and  

E-Print Network (OSTI)

improving system reliability and optimizing the use of on-site generation to reduce energy costs) with new large- scale energy storage (2-MW, 4-MWh battery), static disconnect switch (12 kV, 300 Amps

467

Large Scale, Low Frequency Variability of the 1979 FGGE Surface Buoy Drifts and Winds over the Southern Hemisphere  

Science Conference Proceedings (OSTI)

The surface response of the Southern Hemisphere's oceans to the large spatial scale, interseasonal changes in wind forcing during the FGGE year of 1979 is investigated. The primary data are the analyzed daily wind fields, and the trajectories of ...

W. G. Large; H. Van Loon

1989-02-01T23:59:59.000Z

468

Lee vorticity Production by Large-Scale Tropical Mountain Ranges. Part I: Eastern North Pacific Tropical Cyclogenesis  

Science Conference Proceedings (OSTI)

Numerical simulations using the Penn State University/NCAR MM4 model are performed to examine a dry, stably stratified, zonal easterly flow past a large-scale three-dimensional mountain range in a rotating, initially barotropic, atmosphere. ...

Joel B. Mozer; Joseph A. Zehnder

1996-02-01T23:59:59.000Z

469

Solar Power in the Desert: Are the current large-scale solar developments really improving California’s environment?  

E-Print Network (OSTI)

D EVELOPMENT I SSUES Solar Power in the Desert: Are the2 Most of the large-scale solar power projects utilize largethat will be affected by solar power facilities. There are

Allen, Michael F.; McHughen, Alan

2011-01-01T23:59:59.000Z

470

Agile project dynamics : a strategic project management approach to the study of large-scale software development using system dynamics  

E-Print Network (OSTI)

Large-scale software engineering organizations have traditionally used plan-driven, heavyweight, waterfall-style approaches for the planning, execution, and monitoring of software development efforts. This approach often ...

Glaiel, Firas (Firas S.)

2012-01-01T23:59:59.000Z

471

Surface Layer Transport of Sulfate Particles in the Western United States by the Large-Scale Wind Field  

Science Conference Proceedings (OSTI)

The transport patterns of fine sulfur aerosols in the western United States are shown. The large-scale resultant horizontal flux was computed in terms of that contributed by the mean flux versus that contributed by a turbulence, or eddy, ...

Lowell L. Ashbaugh; Leonard O. Myrup; Robert G. Flocchini

1984-05-01T23:59:59.000Z

472

Large-Scale Atlantic Salinity Changes over the Last Half-Century: A Model–Observation Comparison  

Science Conference Proceedings (OSTI)

Large-scale freshening of the northern Atlantic, and concurrent salinity increases in the low-latitude Atlantic upper layers, have been widely reported for the second half of the twentieth century. The role of anthropogenic and/or unforced ...

Anne Pardaens; Michael Vellinga; Peili Wu; Bruce Ingleby

2008-04-01T23:59:59.000Z

473

Sea Surface Temperature and Large-Scale Circulation Influences on Tropical Greenhouse Effect and Cloud Radiative Forcing  

Science Conference Proceedings (OSTI)

Two independent sets of meteorological reanalyses are used to investigate relationships between the tropical sea surface temperature (SST) and the large-scale vertical motion of the atmosphere for spatial and seasonal variations, as well as for ...

S. Bony; K-M. Lau; Y. C. Sud

1997-08-01T23:59:59.000Z

474

Model As-of Right Zoning Ordinance or Bylaw: Allowing Use of Large-Scale Solar Energy Facilities  

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

Note: This model ordinance was designed to provide guidance to local governments seeking to develop siting rules for large-scale, ground-mounted solar (250 kW and above). While it was developed as...

475

Large-Scale Structure of the June–July 1996 Marine Boundary Layer along California and Oregon  

Science Conference Proceedings (OSTI)

Data from surface stations, profilers, long-range aircraft surveys, and satellites were used to characterize the large-scale structure of the marine boundary layer off of California and Oregon during June and July 1996. To supplement these ...

C. E. Dorman; T. Holt; D. P. Rogers; K. Edwards

2000-06-01T23:59:59.000Z

476

Large-Scale Flow Patterns and Their Influence on the Intensification Rates of Western North Pacific Tropical Storms  

Science Conference Proceedings (OSTI)

NCEP–NCAR reanalysis data are used to identify large-scale environmental flow patterns around western North Pacific tropical storms with the goal of finding a signal for those most favorable for rapid intensification, based on the hypothesis that ...

Justin D. Ventham; Bin Wang

2007-03-01T23:59:59.000Z

477

Spatial and Annual Variations in the Diurnal Cycle of Large-Scale Tropical Convective Cloudiness and Precipitation  

Science Conference Proceedings (OSTI)

Three years of three-hourly infrared satellite data from the American geostationary satellites were used to determine the large-scale spatial and temporal variations in the diurnal cycle of tropical convective precipitation. The region examined ...

Bernard N. Meisner; Phillip A. Arkin

1987-09-01T23:59:59.000Z

478

On the Potential Impact of Irrigated Areas in North America on Summer Rainfall Caused by Large-Scale Systems  

Science Conference Proceedings (OSTI)

The potential impact of the increase in irrigated areas in North America during the past 100 years on summer rainfall associated with medium- to large-scale precipitation systems is evaluated conceptually and by several illustrative numerical ...

M. Segal; Z. Pan; R. W. Turner; E. S. Takle

1998-03-01T23:59:59.000Z

479

Impact of potential large-scale irrigation on the West African Monsoon and its dependence on location of irrigated area  

Science Conference Proceedings (OSTI)

This study investigates the impact of potential large-scale irrigation on the West African Monsoon using the MIT Regional Climate Model (MRCM). A new irrigation module is implemented to assess the impact of location and scheduling of irrigation on ...

Eun-Soon Im; Marc P. Marcella; Elfatih A. B. Eltahir

480

PATHWAYS OF LARGE-SCALE MAGNETIC COUPLINGS BETWEEN SOLAR CORONAL EVENTS  

SciTech Connect

The high-cadence, comprehensive view of the solar corona by SDO/AIA shows many events that are widely separated in space while occurring close together in time. In some c