Sample records for higher efficiencies assumed

  1. States & Energy Efficiency in Higher Education

    Broader source: Energy.gov [DOE]

    This presentation, given through the DOE's Technical Assitance Program (TAP), provides information on States & Energy Efficiency in Higher Education.

  2. Higher Efficiency HVAC Motors | Department of Energy

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33Frequently Asked Questions for DOE FYAffairs,Assessment HazleDepartment of EnergyHigher

  3. Thermal management concepts for higher efficiency heavy vehicles.

    SciTech Connect (OSTI)

    Wambsganss, M. W.

    1999-05-19T23:59:59.000Z

    Thermal management is a cross-cutting technology that directly or indirectly affects engine performance, fuel economy, safety and reliability, aerodynamics, driver/passenger comfort, materials selection, emissions, maintenance, and component life. This review paper provides an assessment of thermal management for large trucks, particularly as it impacts these features. Observations arrived at from a review of the state of the art for thermal management for over-the-road trucks are highlighted and commented on. Trends in the large truck industry, pertinent engine truck design and performance objectives, and the implications of these relative to thermal management, are presented. Finally, new thermal management concepts for high efficiency vehicles are described.

  4. Optimizing Architectural and Structural Aspects of Buildings towards Higher Energy Efficiency

    E-Print Network [OSTI]

    Boyer, Edmond

    Optimizing Architectural and Structural Aspects of Buildings towards Higher Energy Efficiency, intelligent building design, energy efficiency, construction costs, multi-objective optimization. 1 for the optimization of buildings, in terms of sustainable development, is the reduction of energy use (while also

  5. Building Address Locations -Assumes entire

    E-Print Network [OSTI]

    Guenther, Frank

    Building Address Locations - Assumes entire building unless noted Designation Submit through* 560, 4 BU Crosstown Center 801 Massachusetts Ave Floor 1, 2 BMC BCD Building 800 Harrison Avenue BCD BMC Biosquare III 670 Albany Floors 2, 3, 6, 7 BMC Biosquare III 670 Albany Floors 1, 4, 5, 8 BU Building

  6. inverters, offering less weight, higher efficiency, and lower-cost installations.

    E-Print Network [OSTI]

    Johnson, Eric E.

    inverters, offering less weight, higher efficiency, and lower- cost installations. The electrical. These locking connectors will also soon appear on most, if not all, PV modules--although they are only required when the PV array wiring is operating above 30 volts and is readily accessible. Another 2008 NEC

  7. Efficiency of energy funneling in the photosystem II supercomplex of higher plants

    E-Print Network [OSTI]

    Kreisbeck, Christoph

    2015-01-01T23:59:59.000Z

    The investigation of energy transfer properties in photosynthetic multi-protein networks gives insight into their underlying design principles.Here, we discuss excitonic energy transfer mechanisms of the photosystem II (PS-II) C$_2$S$_2$M$_2$ supercomplex, which is the largest isolated functional unit of the photosynthetic apparatus of higher plants.Despite the lack of a decisive energy gradient in C$_2$S$_2$M$_2$, we show that the energy transfer is directed by relaxation to low energy states. C$_2$S$_2$M$_2$ is not organized to form pathways with strict energetic downhill transfer, which has direct consequences on the transfer efficiency, transfer pathways and transfer limiting steps. The exciton dynamics is sensitive to small structural changes, which, for instance, are induced by the reorganization of vibrational coordinates. In order to incorporate the reorganization process in our numerical simulations, we go beyond rate equations and use the hierarchically coupled equation of motion approach (HEOM). Wh...

  8. Efficiency of energy funneling in the photosystem II supercomplex of higher plants

    E-Print Network [OSTI]

    Christoph Kreisbeck; Alán Aspuru-Guzik

    2015-02-08T23:59:59.000Z

    The investigation of energy transfer properties in photosynthetic multi-protein networks gives insight into their underlying design principles.Here, we discuss excitonic energy transfer mechanisms of the photosystem II (PS-II) C$_2$S$_2$M$_2$ supercomplex, which is the largest isolated functional unit of the photosynthetic apparatus of higher plants.Despite the lack of a decisive energy gradient in C$_2$S$_2$M$_2$, we show that the energy transfer is directed by relaxation to low energy states. C$_2$S$_2$M$_2$ is not organized to form pathways with strict energetic downhill transfer, which has direct consequences on the transfer efficiency, transfer pathways and transfer limiting steps. The exciton dynamics is sensitive to small structural changes, which, for instance, are induced by the reorganization of vibrational coordinates. In order to incorporate the reorganization process in our numerical simulations, we go beyond rate equations and use the hierarchically coupled equation of motion approach (HEOM). While transfer from the peripherical antenna to the proteins in proximity to the reaction center occurs on a faster time scale, the final step of the energy transfer to the RC core is rather slow, and thus the limiting step in the transfer chain. Our findings suggest that the structure of the PS-II supercomplex guarantees photoprotection rather than optimized efficiency.

  9. Implementation of higher-order methods for robust and efficient compositional simulation

    E-Print Network [OSTI]

    Firoozabadi, Abbas

    and Physical Engineering, Department of Mathematics, Trojanova 13, 120 00 Prague, Czech Republic a r t i c l e media. Despite powerful features, these methods have inherent limitations when applied to fractured of Computational Physics journal homepage: www.elsevier.com/locate/jcp #12;higher-order method for complex

  10. Increased efficiency of ion acceleration by using femtosecond laser pulses at higher harmonic frequency

    SciTech Connect (OSTI)

    Psikal, J., E-mail: jan.psikal@fjfi.cvut.cz [FNSPE, Czech Technical University in Prague, 11519 Prague (Czech Republic); Klimo, O. [FNSPE, Czech Technical University in Prague, 11519 Prague (Czech Republic); ELI-Beamlines Project, Institute of Physics of the ASCR, 18221 Prague (Czech Republic); Weber, S.; Margarone, D. [ELI-Beamlines Project, Institute of Physics of the ASCR, 18221 Prague (Czech Republic)

    2014-07-15T23:59:59.000Z

    The influence of laser frequency on laser-driven ion acceleration is investigated by means of two-dimensional particle-in-cell simulations. When ultrashort intense laser pulse at higher harmonic frequency irradiates a thin solid foil, the target may become re lativistically transparent for significantly lower laser pulse intensity compared with irradiation at fundamental laser frequency. The relativistically induced transparency results in an enhanced heating of hot electrons as well as increased maximum energies of accelerated ions and their numbers. Our simulation results have shown the increase in maximum proton energy and increase in the number of high-energy protons by a factor of 2 after the interaction of an ultrashort laser pulse of maximum intensity 7?×?10{sup 21?}W/cm{sup 2} with a fully ionized plastic foil of realistic density and of optimal thickness between 100?nm and 200?nm when switching from the fundamental frequency to the third harmonics.

  11. Elevated Temperature Materials for Power Generation and Propulsion The energy industry is designing higher-efficiency land-based turbines for natural gas-fired

    E-Print Network [OSTI]

    Li, Mo

    Elevated Temperature Materials for Power Generation and Propulsion The energy industry is designing higher-efficiency land-based turbines for natural gas-fired power generation systems. The high inlet materials for these aggressive environments. For example, Ni-base superalloys are used to fabricate blades

  12. Linton Brooks Assumes Post as Deputy Administrator for NNSA Defense...

    National Nuclear Security Administration (NNSA)

    Administrator for NNSA Defense Nuclear Nonproliferation Office Press Release Oct 30, 2001 Linton Brooks Assumes Post as Deputy Administrator for NNSA Defense Nuclear...

  13. A Unified Framework for Designing Optimal STSA Estimators Assuming Maximum

    E-Print Network [OSTI]

    Alwan, Abeer

    ) estimators for speech enhancement assuming phase equivalence of speech and noise. By assuming additive measure [34], when applied to the Noizeus database [28]. Although single-channel speech enhancement;2 Speech Enhancement, Noise Suppression, Short-Time Spectral Amplitude Estimation, Generalized Gamma

  14. BomB ThreaT Assume threat is real

    E-Print Network [OSTI]

    Alpay, S. Pamir

    Call 911 BomB ThreaT · Assume threat is real · Evacuate area explosion/ Fire · Activate fire alarm or office, do not let the person in · Do not block person's access to an exit · Move away from the threat

  15. This new system will allow researchers to much more rapidly screen large numbers of samples and identify the most promising biomass feedstocks for higher efficiency and lower cost bio-

    E-Print Network [OSTI]

    of samples and identify the most promising biomass feedstocks for higher efficiency and lower cost bio- fuels conversion processes. NREL will be screening thousands of variants of different biomass feedstocks to link to develop the next generation of low-cost, easily convert- ible biomass feedstocks. To identify superior

  16. Effects of assumed tow architecture on the predicted moduli and stresses in woven composites

    E-Print Network [OSTI]

    Chapman, Clinton Dane

    1993-01-01T23:59:59.000Z

    This study deals with the effect of assumed tow architecture on the elastic material properties and stress distributions of plain weave woven composites. Specifically, the examination of how a cross-section is assumed to sweep-out the tows...

  17. Higher Education

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOnItem NotEnergy,ARMFormsGasReleaseSpeechesHallNot Logged3Education » Higher Education

  18. Higher Efficiency HVAC Motors | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy ChinaofSchaefer To:Department of EnergySeacrist, SeniorVolume 6Department

  19. Life in the Solar System Assume we need energy, liquid water, and organic materials.

    E-Print Network [OSTI]

    Shirley, Yancy

    high pressure, no sunlight, high temperature. Not much chance of life there. Gas Giants #12;The moonsLife in the Solar System Assume we need energy, liquid water, and organic materials. #12;Size N2 Titan Thick atmo Thick atmo Thin atmo #12;Small rocky bodies are unlikely to host life: too hot

  20. ECE 103 Solid State Electronics Master Exam 2012 Assume silicon, room temperature, complete ionization.

    E-Print Network [OSTI]

    Wang, Deli

    ECE 103 Solid State Electronics Master Exam 2012 Assume silicon, room temperature, complete ionization. (q=1.6×10-19 C, ox=3.9×8.85×10-14 F/cm, si=11.7×8.85×10-14 F/cm, kT/q=0.0259 V, Eg=1.12 e

  1. Calculating Routes A Long a Line Assumes that lines exist as a shapefile

    E-Print Network [OSTI]

    Brownstone, Rob

    Calculating Routes A Long a Line Assumes that lines exist as a shapefile Step 1 ­ Create a Route from the Line Shapefile Go to ArcToolBox ­ Linear Referencing Tools ­ Create Route. Fill in Fields;Step 4 ­ Convert to Shapefile Make the event file permanent. Right click on the event table

  2. High Efficiency of Gamma-Ray Bursts Revisited

    E-Print Network [OSTI]

    Y. C. Zou A; Z. G. Dai B

    2007-01-01T23:59:59.000Z

    efficiency of gamma-ray bursts by assuming that the ejecta from the central engine are equally massive and

  3. How much do helioseismological inferences depend upon the assumed reference model?

    E-Print Network [OSTI]

    Sarbani Basu; M. H. Pinsonneault; John N. Bahcall

    1999-09-14T23:59:59.000Z

    We investigate systematic uncertainties in determining the profiles of the solar sound speed, density, and adiabatic index by helioseismological techniques. We find that rms uncertainties-averaged over the sun of ~ 0.2%-0.4% are contributed to the sound speed profile by each of three sources: 1)the choice of assumed reference model, 2) the width of the inversion kernel, and 3) the measurements errors. The density profile is about an order of magnitude less well determined by the helioseismological measurements. The profile of the adiabatic index is determined to an accuracy of about 0.2% . We find that even relatively crude reference models yield reasonably accurate solar parameters.

  4. Configuring Entourage 2008 w/ Exchange Web Services. Note: These instruction assume that the Exchange Web Services (EWS) Update

    E-Print Network [OSTI]

    Blackwell, Keith

    Configuring Entourage 2008 w/ Exchange Web Services. Note: These instruction assume that the Exchange Web Services (EWS) Update , also known as Entourage 13.0, has already been

  5. Engineering evaluation of alternatives: Managing the assumed leak from single-shell Tank 241-T-101

    SciTech Connect (OSTI)

    Brevick, C.H. [ICF Kaiser Hanford Co., Richland, WA (United States); Jenkins, C. [Westinghouse Hanford Co., Richland, WA (United States)

    1996-02-01T23:59:59.000Z

    At mid-year 1992, the liquid level gage for Tank 241-T-101 indicated that 6,000 to 9,000 gal had leaked. Because of the liquid level anomaly, Tank 241-T-101 was declared an assumed leaker on October 4, 1992. SSTs liquid level gages have been historically unreliable. False readings can occur because of instrument failures, floating salt cake, and salt encrustation. Gages frequently self-correct and tanks show no indication of leak. Tank levels cannot be visually inspected and verified because of high radiation fields. The gage in Tank 241-T-101 has largely corrected itself since the mid-year 1992 reading. Therefore, doubt exists that a leak has occurred, or that the magnitude of the leak poses any immediate environmental threat. While reluctance exists to use valuable DST space unnecessarily, there is a large safety and economic incentive to prevent or mitigate release of tank liquid waste into the surrounding environment. During the assessment of the significance of the Tank 241-T-101 liquid level gage readings, Washington State Department of Ecology determined that Westinghouse Hanford Company was not in compliance with regulatory requirements, and directed transfer of the Tank 241-T-101 liquid contents into a DST. Meanwhile, DOE directed WHC to examine reasonable alternatives/options for safe interim management of Tank 241-T-101 wastes before taking action. The five alternatives that could be used to manage waste from a leaking SST are: (1) No-Action, (2) In-Tank Stabilization, (3) External Tank Stabilization, (4) Liquid Retrieval, and (5) Total Retrieval. The findings of these examinations are reported in this study.

  6. On higher spin partition functions

    E-Print Network [OSTI]

    M. Beccaria; A. A. Tseytlin

    2015-06-05T23:59:59.000Z

    We observe that the partition function of the set of all free massless higher spins s=0,1,2,3,... in flat space is equal to one: the ghost determinants cancel against the "physical" ones or, equivalently, the (regularized) total number of degrees of freedom vanishes. This reflects large underlying gauge symmetry and suggests analogy with supersymmetric or topological theory. The Z=1 property extends also to the AdS background, i.e. the 1-loop vacuum partition function of Vasiliev theory is equal to 1 (assuming a particular regularization of the sum over spins); this was noticed earlier as a consistency requirement for the vectorial AdS/CFT duality. We find that Z=1 is also true in the conformal higher spin theory (with higher-derivative d^{2s} kinetic terms) expanded near flat or conformally flat S^4 background. We also consider the partition function of free conformal theory of symmetric traceless rank s tensor field which has 2-derivative kinetic term but only scalar gauge invariance in flat 4d space. This non-unitary theory has a Weyl-invariant action in curved background and corresponds to "partially massless" field in AdS_5. We discuss in detail the special case of s=2 (or "conformal graviton"), compute the corresponding conformal anomaly coefficients and compare them with previously found expressions for generic representations of conformal group in 4 dimensions.

  7. On higher spin partition functions

    E-Print Network [OSTI]

    Beccaria, M

    2015-01-01T23:59:59.000Z

    We observe that the partition function of the set of all free massless higher spins s=0,1,2,3,... in flat space is equal to one: the ghost determinants cancel against the "physical" ones or, equivalently, the (regularized) total number of degrees of freedom vanishes. This reflects large underlying gauge symmetry and suggests analogy with supersymmetric or topological theory. The Z=1 property extends also to the AdS background, i.e. the 1-loop vacuum partition function of Vasiliev theory is equal to 1 (assuming a particular regularization of the sum over spins); this was noticed earlier as a consistency requirement for the vectorial AdS/CFT duality. We find that Z=1 is also true in the conformal higher spin theory (with higher-derivative d^{2s} kinetic terms) expanded near flat or conformally flat S^4 background. We also consider the partition function of free conformal theory of symmetric traceless rank s tensor field which has 2-derivative kinetic term but only scalar gauge invariance in flat space. This non...

  8. Reaction rate prediction for elementary reactions in binary mixed solvents assuming an additive solvation of reactant(s)

    E-Print Network [OSTI]

    Van Woert, Howard Clark

    1976-01-01T23:59:59.000Z

    REACTION RATE PREDICTION FOR ELEMENTARY REACTIONS IN BINARY MIXED SOLVENTS ASSUMING AN ADDITIVE SOLVATION OF REACTANT(S) A Thesis by HOWARD CLARK VAN WOERT, JR. Submitted to the Graduate College of Texas AkN University in partial fulfillment... of the requirement for the degree of MASTER OF SCIENCE August 1976 Major Subject: Chemistry REACTION RATE PREDICTION FOR ELEMENTARY REACTIONS IN BINARY MIXED SOLVENTS ASSUMING AN ADDITIVE SOLVATION OF REACTANT(S) A Thesis HOWARD CLARK VAN WOERT, JR. Approved...

  9. assumed, with no inter-district transport.) If the conventional technology coal-fired power plant is used

    E-Print Network [OSTI]

    assumed, with no inter-district transport.) If the conventional technology coal-fired power plant-fired power plant is used for comparison, then lower SO2, NOx or particulate emissions can be expected in 9. A final option considered was to retrofit emission controls for captive power plants at an additional cost

  10. 6. Multiple sequence alignment methods In Chapter 5, we assumed that a reasonable multiple sequence alignment was already

    E-Print Network [OSTI]

    Xie, Jun

    6. Multiple sequence alignment methods In Chapter 5, we assumed that a reasonable multiple sequence sequences. Biologists produce high quality multiple sequence alignments by hand using expert knowledge of protein sequence evolution. Importance factors include: specific sorts of columns in alignments

  11. Boiler Efficiency--Consider All the Angles

    E-Print Network [OSTI]

    Blakeley, C. P.

    1981-01-01T23:59:59.000Z

    COMBUSTION EFFICIENCY (Assuming constant radiation and other unaccounted-for losses) As is Reading Corrected Reading From an To an increased combustion efficiency of: original efficiency of: 55% 60% 65% 70% 75% 80% 85% 90% 95% 50% $9.10 16.70 23...

  12. Higher Education Masterof Education

    E-Print Network [OSTI]

    Rock, Chris

    .ttu.edu Effective Fall 2013, Updated 12/09/13 #12;3 Higher Education Masters of Education Program Overview2 Higher Education Masterof Education (M.Ed.) Program Handbook College of Education Graduate Education and Research Texas Tech University

  13. Microwave-Assisted Ignition for Improved Internal Combustion Engine Efficiency

    E-Print Network [OSTI]

    DeFilippo, Anthony Cesar

    2013-01-01T23:59:59.000Z

    internal combustion engine applications. Advanced engines can achieve higher efficiencies and reduced emissions

  14. Evaluating High Efficiency Motor Retrofit 

    E-Print Network [OSTI]

    Evans, T. A.

    1984-01-01T23:59:59.000Z

    OPERATING COST Although It would seem that most peoPlel un derstand the re I atlonsh I p beneen the fIrst cost and operating cost for motors, that's not the case. The purchase price of a standard efficIency 50 HP enclosed motor I s about $2000. Operatl...Ife, the energy efficIent motor will save about $7100 - assum f ng power costs grow as forecasted. That's why the co nom J cs of Energy $aver motors are so attractIve. The savIngs, assuming continuous operatIon at a 5i/kWh power cost, range from $300 per year...

  15. Relations between Points and Subsets Assume given a metric or topological space X and any subset A X. We discuss

    E-Print Network [OSTI]

    Boardman, J. Michael

    Relations between Points and Subsets Assume given a metric or topological space X and any subset - A of A. We call x an exterior point of A. Since x N, these points never lie in A. They form the exterior exterior 2. x has a neighborhood N with x A Int limit non-empty N - x A. x A Fr limit 3. x has

  16. FERC allows higher rate of return for independent projects: the Ocean State power project

    SciTech Connect (OSTI)

    Not Available

    1987-06-01T23:59:59.000Z

    The Federal Energy Regulatory Commission ruling last February to allow a private owners of a powerplant to receive a higher rate of return than normal electric utilities if they assumed the risks of cogeneration without qualifying under the Public Utility Regulatory Policies Act also leaves an out for unusual situations. The key to the decisions was an acknowledgement that those assuming higher risk deserve higher compensation. The incentive package is unique in the way it handles cost recovery and availability contracts.

  17. Fast and efficient transport of large ion clouds

    E-Print Network [OSTI]

    Kamsap, Marius Romuald; Champenois, Caroline; Guyomarc'H, Didier; Houssin, Marie; Knoop, Martina

    2015-01-01T23:59:59.000Z

    The manipulation of trapped charged particles by electric fields is an accurate, robust and reliable technique for many applications or experiments in high-precision spectroscopy. The transfer of the ion sample between multiple traps allows the use of a tailored environment in quantum information, cold chemistry, or frequency metrology experiments. In this article, we experimentally study the transport of ion clouds of up to 50 000 ions. The design of the trap makes ions very sensitive to any mismatch between the assumed electric potential and the actual local one. Nevertheless, we show that being fast (100 $\\mu$s to transfer over more than 20 mm) increases the transport efficiency to values higher than 90 %, even with a large number of ions. For clouds of less than 2000 ions, a 100 % transfer efficiency is observed.

  18. Developing Information on Energy Savings and Associated Costs and Benefits of Energy Efficient Emerging Technologies Applicable in California

    E-Print Network [OSTI]

    Xu, Tengfang

    2011-01-01T23:59:59.000Z

    Efficiency & Industrial Boiler Efficiency: An Industryapproach to increase boiler efficiency focused on the flue‘Super Boiler' achieves higher efficiency through the

  19. Water Efficiency

    Energy Savers [EERE]

    Water Efficiency Hosted by: FEDERAL UTILITY PARTNERSHIP WORKING GROUP SEMINAR November 5-6, 2014 Cape Canaveral, Florida WATER EFFICIENCY Federal Utility Partnership Working Group...

  20. Silicon Ink Technology Offers Path to Higher Efficiency Solar...

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

    equity investments. The Incubator program provides early-stage assistance to help startup companies cross technological barriers to commercialization while encouraging private...

  1. DOE Proposes Higher Efficiency Standards for Refrigerators | Department of

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613PortsmouthBartlesvilleAbout »Department of2 DOEDepartment ofPosting

  2. Molecular Engineering of Conjugated Polymers to Reach Higher Efficiency

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC)Integrated Codes |IsLove Your1 SECTION A.Model Verification

  3. ION-BY-ION COOLING EFFICIENCIES

    SciTech Connect (OSTI)

    Gnat, Orly [Theoretical Astrophysics, California Institute of Technology, MC 350-17, Pasadena, CA 91125 (United States) and Racah Institute of Physics, Hebrew University, 91904 Jerusalem (Israel); Ferland, Gary J., E-mail: orlyg@tapir.caltech.edu [Department of Physics and Astronomy, University of Kentucky, Lexington, KY 40506 (United States)

    2012-03-01T23:59:59.000Z

    We present ion-by-ion cooling efficiencies for low-density gas. We use Cloudy (version 10.00) to estimate the cooling efficiencies for each ion of the first 30 elements (H-Zn) individually. We present results for gas temperatures between 10{sup 4} and 10{sup 8} K, assuming low densities and optically thin conditions. When nonequilibrium ionization plays a significant role the ionization states deviate from those that obtain in collisional ionization equilibrium (CIE), and the local cooling efficiency at any given temperature depends on specific nonequilibrium ion fractions. The results presented here allow for an efficient estimate of the total cooling efficiency for any ionic composition. We also list the elemental cooling efficiencies assuming CIE conditions. These can be used to construct CIE cooling efficiencies for non-solar abundance ratios or to estimate the cooling due to elements not included in any nonequilibrium computation. All the computational results are listed in convenient online tables.

  4. Molecular Engineering of Conjugated Polymers to Reach Higher...

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

    Engineering of Conjugated Polymers to Reach Higher Efficiency "Plastic" Solar Cells November 12, 2010 at 3pm36-428 Wei You University of North Carolina you.wei001 abstract: The...

  5. Application Guidelines for Energy Efficient Motors

    E-Print Network [OSTI]

    Cowern, E. H.

    1983-01-01T23:59:59.000Z

    , higher costs and marginal improvements in overall plant efficiency. This paper offers some general guidelines that can be used to help the ultimate user put energy efficient drives on those applications where the greatest results can be achieved....

  6. Increasing Energy Efficiency and Reducing Emissions from China's Cement Kilns: Audit Report of Two Cement Plants in Shandong Province, China

    E-Print Network [OSTI]

    Price, Lynn

    2013-01-01T23:59:59.000Z

    transfer in boiler Boiler efficiency Heat used in boiler *hr. Assuming boiler heat recovery efficiency of 90%, totalEfficiency Improvement An analysis of the performance of the heat recovery components (boilers,

  7. Energy Efficiency Upgrades

    SciTech Connect (OSTI)

    Roby Williams

    2012-03-29T23:59:59.000Z

    The energy efficiency upgrades project at Hardin County General Hospital did not include research nor was it a demonstration project. The project enabled the hospital to replace outdated systems with modern efficient models. Hardin County General Hospital is a 501c3, nonprofit hospital and the sole community provider for Hardin and Pope Counties of Illinois. This project provided much needed equipment and facility upgrades that would not have been possible through locally generated funding. Task 1 was a reroofing of the hospital. The hospital architect designed the replacement to increase the energy efficiency of the hospital roof/ceiling structure. Task 2 was replacement and installation of a new more efficient CT scanner for the hospital. Included in the project was replacement of HVAC equipment for the entire radiological suite. Task 5 was a replacement and installation of a new higher capacity diesel-fueled emergency generator for the hospital replacing a 50+ year old gas-fired generator. Task 7 was the replacement of 50+ year-old walk-in cooler/freezer with a newer, energy efficient model. Task 8 was the replacement of 10+ year-old washing machines in the hospital laundry with higher capacity, energy efficient models. Task 9 was replacement of 50-year old single pane curtain window system with double-pane insulated windows. Additionally, insulation was added around ventilation systems and the curtain wall system.

  8. Theorem 1. L Act is realizable if and only if L is closed under |=. =. Assume L is realizable. Thus, there exists a weak CFM A (a CFM

    E-Print Network [OSTI]

    Ábrahám, Erika

    . Let w Act, be well-formed, and assume L |= w. By definition of |=, this means that for every process p there exists a word vp L such that vp p = w p. We show that w L. (Then it follows that L" receipts. Thus w L. =. Assume L is closed under |=. As |= is only defined for well-formed words, each word

  9. Higher Education Tuition Assistance And

    E-Print Network [OSTI]

    Mohaghegh, Shahab

    and West Virginia Higher Education Grant Recipients October 2009 Revised: November 2009 Prepared ..................................5 3. Work Participation And Wages For W.Va. Public Higher Education Graduates Receiving PROMISE........................................................................11 5. Work Participation In 2008 Of Graduates From West Virginia Public Higher Education Institutions

  10. Public Health Benefits of End-Use Electrical Energy Efficiency in California: An Exploratory Study

    E-Print Network [OSTI]

    McKone, Thomas E.

    2011-01-01T23:59:59.000Z

    coal-powered electricity generating plants located in rural counties (primarily the Mohave coal power plant).power plant efficiencies assumed in the estimates. Because value ranges for efficiencies of coal- powered

  11. Acceleration Rates and Injection Efficiencies in Oblique Shocks

    E-Print Network [OSTI]

    D. C. Ellison; M. G. Baring; F. C. Jones

    1995-06-12T23:59:59.000Z

    The rate at which particles are accelerated by the first-order Fermi mechanism in shocks depends on the angle, \\teq{\\Tbone}, that the upstream magnetic field makes with the shock normal. The greater the obliquity the greater the rate, and in quasi-perpendicular shocks rates can be hundreds of times higher than those seen in parallel shocks. In many circumstances pertaining to evolving shocks (\\eg, supernova blast waves and interplanetary traveling shocks), high acceleration rates imply high maximum particle energies and obliquity effects may have important astrophysical consequences. However, as is demonstrated here, the efficiency for injecting thermal particles into the acceleration mechanism also depends strongly on obliquity and, in general, varies inversely with \\teq{\\Tbone}. The degree of turbulence and the resulting cross-field diffusion strongly influences both injection efficiency and acceleration rates. The test particle \\mc simulation of shock acceleration used here assumes large-angle scattering, computes particle orbits exactly in shocked, laminar, non-relativistic flows, and calculates the injection efficiency as a function of obliquity, Mach number, and degree of turbulence. We find that turbulence must be quite strong for high Mach number, highly oblique shocks to inject significant numbers of thermal particles and that only modest gains in acceleration rates can be expected for strong oblique shocks over parallel ones if the only source of seed particles is the thermal background.

  12. Energy Efficient Adaptation of Multicast Protocols in Power Controlled Wireless Ad Hoc Networks

    E-Print Network [OSTI]

    Prasanna, Viktor K.

    on energy efficiency in ad hoc networks. In this paper, we assume a more practical model for power controlEnergy Efficient Adaptation of Multicast Protocols in Power Controlled Wireless Ad Hoc Networks to power controlled networks is presented. Wireless nodes are assumed to have transmis- sion power control

  13. West Virginia Higher Education Graduate

    E-Print Network [OSTI]

    Mohaghegh, Shahab

    West Virginia Higher Education Graduate Employment And Wage Trends: 2003-2010 Summary Results October 2011 Prepared for the West Virginia Higher Education Policy Commission By George W. Hammond and Economic Research College of Business and Economics West Virginia University © Copyright 2011 WVU Research

  14. West Virginia Higher Education Graduate

    E-Print Network [OSTI]

    Mohaghegh, Shahab

    West Virginia Higher Education Graduate Employment By Industry 2009 July 2010 Prepared for the West Research Assistant Bureau of Business and Economic Research College of Business and Economics West Virginia 1. Work Participation And Annualized Wages Of West Virginia Public Higher Education Graduates From

  15. Efficiency Exchange Conference Highlights Energy Efficiency Innovation...

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

    Efficiency Exchange Conference Highlights Energy Efficiency Innovations and Trends Northwest electric power industry connects on the latest energy efficiency programs and...

  16. Efficiency Exchange highlights energy efficiency innovations...

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

    Efficiency Exchange highlights energy efficiency innovations and trends Northwest electric power industry connects on the latest energy efficiency programs and strategies Portland,...

  17. Formation of Porous Layers by Electrochemical Etching of Germanium and Gallium Arsenide for Cleave Engineered Layer Transfer (CELT) Application in High Efficiency Multi-Junction Solar Cells

    E-Print Network [OSTI]

    Fong, David Michael

    2012-01-01T23:59:59.000Z

    film photovoltaics [1]. This roughly doubling of efficiencyMJ photovoltaics. MJ solar cells achieve higher efficiencies

  18. Energy Efficiency in Chilling Plants

    E-Print Network [OSTI]

    Wang, X.

    2006-01-01T23:59:59.000Z

    1 Energy Efficiency in Chilling Plants Xin Wang????PhD. CandidateBuilding Energy Research Centre, Tsinghua University2006.10.11 2 Index ? Improve COP of chillers ? Increase load ratio? Decrease cooling water temperature? Increase chilled water... temperature ? Reduce energy use of pumps ? Avoid unexpected bypass flow? Keep Working on higher efficiency point? Optimized VFD control Report of On-site Survey, 2005, 20063 1.1 Improve load ratio ? Characteristic of the centrifugal chillers Decrease...

  19. Off-Campus Housing Resource Center DISCLAIMER: Please keep in mind that the University assumes no responsibility for contracts/leases between individuals. The

    E-Print Network [OSTI]

    Kounaves, Samuel P.

    Off-Campus Housing Resource Center DISCLAIMER: Please keep in mind that the University assumes no responsibility for contracts/leases between individuals. The Off-Campus Housing Resource Center is not responsible or liable for the consequences of any off-campus student housing arrangement. In addition, Tufts

  20. Wireless connection instructions -Mac This document outlines the procedure for setting up Apple OS X to use the College wireless network. It assumes that you

    E-Print Network [OSTI]

    Goldschmidt, Christina

    X to use the College wireless network. It assumes that you have already connected your computer connection pack from the Computer Office before proceeding. Connect your computer to the wireless network your wireless connection Click on the Apply for access to Murray Edwards College Network link Please

  1. Wireless connection instructions -Windows This document outlines the procedure for setting up Windows7, Vista or XP to use the College wireless network. It assumes

    E-Print Network [OSTI]

    Goldschmidt, Christina

    Windows7, Vista or XP to use the College wireless network. It assumes that you have already connected your network Double click the wireless connection icon at the bottom right hand corner of your screen. Click View Wireless Networks. Select Academic MurrayEdwards and click the Connect button. Close the View

  2. Discovery Park's Birck Nanotechnology Center (BNC) has assumed a leadership role in K-12 STEM activities. Faculty, administrators, and graduate students work together to provide K-12

    E-Print Network [OSTI]

    Ginzel, Matthew

    Discovery Park's Birck Nanotechnology Center (BNC) has assumed a leadership role in K-12 STEM that are fun, interactive and educational. Birck Nanotechnology Center led a workshop for K-12 teachers in 2009, the Birck Nanotechnology Center continued to build this relationship by hosting NanoDays, a nationwide

  3. Efficiencies of Quantum Optical Detectors

    E-Print Network [OSTI]

    Daniel Hogg; Dominic W. Berry; A. I. Lvovsky

    2014-12-15T23:59:59.000Z

    We propose a definition for the efficiency that can be universally applied to all classes of quantum optical detectors. This definition is based on the maximum amount of optical loss that a physically plausible device can experience while still replicating the properties of a given detector. We prove that detector efficiency cannot be increased using linear optical processing. That is, given a set of detectors, as well as arbitrary linear optical elements and ancillary light sources, it is impossible to construct detection devices that would exhibit higher efficiencies than the initial set.

  4. Iron efficiency in sorghum 

    E-Print Network [OSTI]

    Esty, James Craig

    1979-01-01T23:59:59.000Z

    . DeKoch (28) indicated that the total amount of Fe in the roots of plants bears little relation to chlorosis, as roots of chlorotic plants may contain a higher percentage of Fe than roots of healthy plants. Fe was internally inactivated in soybeans...) developed a technique to de- termine Fe efficiency in plants, they stated that some control of pH was needed in the growth medium and they + accomplished this by using NO 3 nitrogen and NH 4 nitrogen in nutrient solutions. A decrease in pH of the growth...

  5. Complex higher order derivative theories

    SciTech Connect (OSTI)

    Margalli, Carlos A.; Vergara, J. David [Instituto de Ciencias Nucleares, Universidad Nacional Autonoma de Mexico, Apartado Postal 70-543, Mexico 04510 DF (Mexico)

    2012-08-24T23:59:59.000Z

    In this work is considered a complex scalar field theory with higher order derivative terms and interactions. A procedure is developed to quantize consistently this system avoiding the presence of negative norm states. In order to achieve this goal the original real scalar high order field theory is extended to a complex space attaching a complex total derivative to the theory. Next, by imposing reality conditions the complex theory is mapped to a pair of interacting real scalar field theories without the presence of higher derivative terms.

  6. Deconstructing unparticles in higher dimensions

    SciTech Connect (OSTI)

    Lee, Jong-Phil [Korea Institute for Advanced Study, Seoul 130-722 (Korea, Republic of)

    2009-04-01T23:59:59.000Z

    Unparticles are realized by deconstruction in higher extra dimensions. It is shown that in this framework when the scale invariance is broken, the corresponding spectral function of the unparticle is shifted by an amount of the breaking scale. The result strongly supports the conventional ansatz for the spectral function of the unparticle in the literature.

  7. Efficiency Improvements

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOnItem NotEnergy,ARMFormsGasRelease Date:research community --EducationEfficiency

  8. Energy Efficiency

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadapInactiveVisitingContractElectron-StateEnergyHeavy Duty VehicleNuclearEnergy-Efficiency Sign In

  9. Photovoltaic cell efficiency at elevated temperatures

    E-Print Network [OSTI]

    Ray, Katherine Leung

    2010-01-01T23:59:59.000Z

    In order to determine what type of photovoltaic solar cell could best be used in a thermoelectric photovoltaic hybrid power generator, we tested the change in efficiency due to higher temperatures of three types of solar ...

  10. Dynamic workload characterization for energy efficient computing

    E-Print Network [OSTI]

    Dhiman, Gaurav

    2011-01-01T23:59:59.000Z

    a novel, energy efficient hybrid main memory system based onthe hybrid system achieves around 30% energy savings forenergy savings for the uniform system is higher (around 49%) than hybrid

  11. Twist operators in higher dimensions

    E-Print Network [OSTI]

    Ling-Yan Hung; Robert C. Myers; Michael Smolkin

    2014-07-24T23:59:59.000Z

    We study twist operators in higher dimensional CFT's. In particular, we express their conformal dimension in terms of the energy density for the CFT in a particular thermal ensemble. We construct an expansion of the conformal dimension in power series around n=1, with n being replica parameter. We show that the coefficients in this expansion are determined by higher point correlations of the energy-momentum tensor. In particular, the first and second terms, i.e. the first and second derivatives of the scaling dimension, have a simple universal form. We test these results using holography and free field theory computations, finding agreement in both cases. We also consider the `operator product expansion' of spherical twist operators and finally, we examine the behaviour of correlators of twist operators with other operators in the limit n ->1.

  12. application agronomic efficiency: Topics by E-print Network

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

    of operations commonly applied in state Seinstra, Frank J. 4 Application Guidelines for Energy Efficient Motors Texas A&M University - TxSpace Summary: , higher costs and...

  13. Energy Efficiency Block Grant Approved Funds --Direct Purchase California Energy Commission

    E-Print Network [OSTI]

    in streetlights with higher efficiency options including induction or light emitting diodes. 4/7/2010 CITY

  14. California Appliance Efficiency Database for Consumers

    E-Print Network [OSTI]

    several products that use electricity or water, including: · Airconditioners,heaters)--the higher the SEER, the more efficient the air conditioner is. A water heater's energy factor determines its efficiency, so look for the water heater with the highest energy factor. Every type of product listed has its

  15. Efficiency United (Gas)- Residential Efficiency Program

    Broader source: Energy.gov [DOE]

    The Efficiency United program is intended to provide assistance and incentives to customers who employ energy efficient measures. Programs offer rebates on natural gas water heaters, clothes...

  16. Efficiency-A Pump Engineering Nemesis?

    E-Print Network [OSTI]

    McGuire, J. T.

    EFFICIENCY - A PUMP ENGINEERING NEMESIS? J. T. McGUIRE ENGINEERING MANAGER DRESSER PUMP DIVISION, DRESSER INDUSTRIES, INC. HARRISON, N. J. ABSTRACT Higher pump efficiency, a most worthy objective, is being pursued with increasing vigour... as energy costs rise. There are signs, however, that the pursuit occasionally loses its perspective. To try to eliminate these lapses, the paper restates the objective, looks at the importance of system design, then discusses pump efficiency and its...

  17. Counterfactual quantum key distribution with high efficiency

    SciTech Connect (OSTI)

    Sun Ying [State Key Laboratory of Networking and SwitchingTechnology, Beijing University of Posts and Telecommunications, Beijing 100876 (China); Beijing Electronic Science and Technology Institute, Beijing 100070 (China); Wen Qiaoyan [State Key Laboratory of Networking and SwitchingTechnology, Beijing University of Posts and Telecommunications, Beijing 100876 (China)

    2010-11-15T23:59:59.000Z

    In a counterfactual quantum key distribution scheme, a secret key can be generated merely by transmitting the split vacuum pulses of single particles. We improve the efficiency of the first quantum key distribution scheme based on the counterfactual phenomenon. This scheme not only achieves the same security level as the original one but also has higher efficiency. We also analyze how to achieve the optimal efficiency under various conditions.

  18. Energy efficient data centers

    E-Print Network [OSTI]

    Tschudi, William; Xu, Tengfang; Sartor, Dale; Koomey, Jon; Nordman, Bruce; Sezgen, Osman

    2004-01-01T23:59:59.000Z

    Report on Energy Efficient Data Centers - A Rocky MountainReport on Energy Efficient Data Centers - A Rocky MountainEnergy Efficient Data Centers Prepared by William Tschudi,

  19. Energy Efficiency Loan Program

    Broader source: Energy.gov [DOE]

    The Keystone HELP Energy Efficiency Loan Program is designed to help homeowners improve energy efficiency with special financing for high-efficiency heating, air conditioning, insulation, windows,...

  20. Business Case for Energy Efficiency in Support of Climate Change Mitigation, Economic and Societal Benefits in India

    SciTech Connect (OSTI)

    McNeil, Michael A.; Ke, Jing; Can, Stephane de la Rue du; Letschert, Virginie E.; McMahon, James E.

    2011-12-02T23:59:59.000Z

    This study seeks to provide policymakers and other stakeholders with actionable information towards a road map for reducing energy consumption cost-effectively. We focus on individual end use equipment types (hereafter referred to as appliance groups) that might be the subject of policies - such as labels, energy performance standards, and incentives - to affect market transformation in the short term, and on high-efficiency technology options that are available today. the high efficiency or Business Case scenario is constructed around a model of cost-effective efficiency improvement. Our analysis demonstrates that a significant reduction in energy consumption and emissions is achievable at net negative cost, that is, as a profitable investment for consumers. Net savings are calculated assuming no additional costs to energy consumption such as carbon taxes. Savings relative to the base case as calculated in this way is often referred to as “economic savings potential”. So far, the Indian market has responded favorably to government efficiency initiatives, with Indian manufacturers producing a higher fraction of high-efficiency equipment than before program implementation. This study highlights both the financial benefit and the scope of potential impact for adopting this equipment, all of which is already readily available on the market. The approach of the study is to assess the impact of short-term actions on long-term impacts. “Short-term” market transformation is assumed to occur by 2015, while “long-term” energy demand reduction impacts are assessed in 2030. In the intervening years, most but not all of the equipment studied will turn over completely. The Business Case concentrates on technologies for which cost-effectiveness can be clearly demonstrated.

  1. PDSF Job Efficiency

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

    Optimization Running Jobs Efficiently Running Jobs Efficiently Job Efficiency A job's efficiency is the ratio of its CPU time to the actual time it took to run, i.e., cputime ...

  2. Enhanced Efficiency of Internal Combustion Engines By Employing Spinning Gas

    SciTech Connect (OSTI)

    Geyko, Vasily; Fisch, Nathaniel

    2014-02-27T23:59:59.000Z

    The efficiency of the internal combustion engine might be enhanced by employing spinning gas. A gas spinning at near sonic velocities has an effectively higher heat capacity, which allows practical fuel cycles, which are far from the Carnot efficiency, to approach more closely the Carnot efficiency. A gain in fuel efficiency of several percent is shown to be theoretically possible for the Otto and Diesel cycles. The use of a flywheel, in principle, could produce even greater increases in the efficiency.

  3. The higher spin Laplace operator

    E-Print Network [OSTI]

    Hendrik De Bie; David Eelbode; Matthias Roels

    2015-01-24T23:59:59.000Z

    This paper deals with a certain class of second-order conformally invariant operators acting on functions taking values in particular (finite-dimensional) irreducible representations of the orthogonal group. These operators can be seen as a generalisation of the Laplace operator to higher spin as well as a second order analogue of the Rarita-Schwinger operator. To construct these operators, we will use the framework of Clifford analysis, a multivariate function theory in which arbitrary irreducible representations for the orthogonal group can be realised in terms of polynomials satisfying a system of differential equations. As a consequence, the functions on which this particular class of operators act are functions taking values in the space of harmonics homogeneous of degree k. We prove the ellipticity of these operators and use this to investigate their kernel, focusing on both polynomial solutions and the fundamental solution.

  4. From Higher Education To Work In West

    E-Print Network [OSTI]

    Mohaghegh, Shahab

    From Higher Education To Work In West Virginia 2009 Summary Results For Work Participation Virginia Higher Education Policy Commission By George W. Hammond, Associate Director Adam Hoffer, Graduate Virginia Higher Education Policy Commission. Opinions expressed herein are the responsibility

  5. Global Compact for Higher Education Institutions

    E-Print Network [OSTI]

    Global Compact for Higher Education Institutions Communicating on Progress for Université Laval Guide to the United Nations Global Compact for Higher Education Institutions: Implementing the Global to the United Nations Global Compact for Higher Education Institutions: Implementing the Global Compact

  6. Realized and Projected Impacts of U.S. Energy Efficiency Standards for Residential and Commercial Appliances

    E-Print Network [OSTI]

    Meyers, Stephen P.

    2008-01-01T23:59:59.000Z

    conducted as part of DOE’s standards rulemaking process.used by DOE and assumed that the standards did cause someDocuments for DOE Energy Efficiency Standards 1. U.S.

  7. Efficient Network Structures with Separable Heterogeneous Connection Costs

    E-Print Network [OSTI]

    Heydari, Babak; Dalili, Kia

    2015-01-01T23:59:59.000Z

    We introduce a heterogeneous connection model for network formation to capture the effect of cost heterogeneity on the structure of efficient networks. In the proposed model, connection costs are assumed to be separable, which means the total connection cost for each agent is uniquely proportional to its degree. For these sets of networks, we provide the analytical solution for the efficient network and discuss stability impli- cations. We show that the efficient network exhibits a core-periphery structure, and for a given density, we find a lower bound for clustering coefficient of the efficient network.

  8. High Efficiency of Gamma-Ray Bursts Revisited

    E-Print Network [OSTI]

    Y. C. Zou; Z. G. Dai

    2007-03-07T23:59:59.000Z

    Using the conservation of energy and momentum during collisions of any two shells, we consider the efficiency of gamma-ray bursts by assuming that the ejecta from the central engine are equally massive and have the same Lorentz factors. We calculate the efficiency and the final Lorentz factor of the merged whole shell for different initial diversities of Lorentz factors and for different microscopic radiative efficiency. As a result, a common high efficiency in the range of 0.1 to 0.9 is considerable, and a very high value near 100% is also reachable if the diversity of the Lorentz factors is large enough.

  9. Efficiency United (Gas)- Commercial Efficiency Program

    Broader source: Energy.gov [DOE]

    The Efficiency United Program, administered by CLEAResult Consulting, provides commercial gas incentives for the following Michigan utilities:

  10. Efficient Generation of Generic Entanglement

    E-Print Network [OSTI]

    R. Oliveira; O. C. O. Dahlsten; M. B. Plenio

    2007-04-03T23:59:59.000Z

    We find that generic entanglement is physical, in the sense that it can be generated in polynomial time from two-qubit gates picked at random. We prove as the main result that such a process generates the average entanglement of the uniform (Haar) measure in at most $O(N^3)$ steps for $N$ qubits. This is despite an exponentially growing number of such gates being necessary for generating that measure fully on the state space. Numerics furthermore show a variation cut-off allowing one to associate a specific time with the achievement of the uniform measure entanglement distribution. Various extensions of this work are discussed. The results are relevant to entanglement theory and to protocols that assume generic entanglement can be achieved efficiently.

  11. On the Higher-Order MoM-PO Electromagnetic Modeling of Vehicles

    E-Print Network [OSTI]

    Notaros, Branislav M.

    vehicles (cars, airplanes, helicopters, spacecraft, etc.). From the electromagnetic point of view and accurate higher-order, large-domain hybrid computational technique based on the method of moments (Mo the efficiency and accuracy of the hybrid higher-order computational technique and its advantages over

  12. 2007NaturePublishingGrouphttp://www.nature.com/naturemethods Higher-energy C-trap

    E-Print Network [OSTI]

    Cai, Long

    be efficiently fragmented by high-accuracy and full-mass-range tandem mass spectrometry (MS/MS) via higher-energy©2007NaturePublishingGrouphttp://www.nature.com/naturemethods Higher-energy C-trap dissociation Horning2 & Matthias Mann1 Peptide sequencing is the basis of mass spectrometry­driven proteomics. Here we

  13. Energy Efficient Digital Networks

    E-Print Network [OSTI]

    Lanzisera, Steven

    2014-01-01T23:59:59.000Z

    2007. Enabling an Energy-Efficient Future Internet ThroughIEEE 802.3az: The Road to Energy Efficient Ethernet. IEEEPHY Compliant With New Energy Efficient Ethernet Guidelines;

  14. Compressed Air Supply Efficiency

    E-Print Network [OSTI]

    Joseph, B.

    2004-01-01T23:59:59.000Z

    This project, under contract from California Energy Commission, developed the CASE (Compressed Air Supply Efficiency) Index as a stand-alone value for compressor central plant efficiency. This Index captures the overall efficiency of a compressed...

  15. Energy Efficient Radio Resource

    E-Print Network [OSTI]

    Yanikomeroglu, Halim

    Energy Efficient Radio Resource Management in a Coordinated Multi-Cell Distributed Antenna System Omer HALILOGLU Introduction System Model Performance Evaluation Conclusion References Energy Efficient Hacettepe University 5 September 2014 Omer HALILOGLU (Hacettepe University) Energy Efficient Radio Resource

  16. Energy efficient data centers

    E-Print Network [OSTI]

    Tschudi, William; Xu, Tengfang; Sartor, Dale; Koomey, Jon; Nordman, Bruce; Sezgen, Osman

    2004-01-01T23:59:59.000Z

    Varone. 2002a. Energy- and Eco-Efficiency of Data Centres. ANew Buildings S Energy- and Eco-Efficiency of Data Centres:FC Source: Energy- and Eco-Efficiency of Data Centres: A

  17. Energy Efficiency -- Home Page

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

    If you are having trouble, call 202-586-8800 for help. Home >Energy Users EEnergy Efficiency Page Energy-Efficiency Measurement MEASUREMENT DISCUSSION: Measures and Policy Issues...

  18. Data Center Energy Efficiency

    Broader source: Energy.gov [DOE]

    The Federal Energy Management Program (FEMP) supports data center efficiency initiatives by encouraging Federal agencies to adopt best practices and construct energy-efficient data centers.

  19. Energy Efficient Motors

    E-Print Network [OSTI]

    Hoffmeyer, W.

    1982-01-01T23:59:59.000Z

    , and how to interpret efficiency data. A perspective is given from which to evaluate available energy efficient motor offerings for a given application....

  20. Definition of Energy Efficiency

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

    from energy-intensive industries. See "Energy-Efficiency Measurement: Discussion". bluenext.gif (2052 bytes) Energy-Efficiency Measurement line divider For specific questions...

  1. Water Efficiency Goal Guidance

    Broader source: Energy.gov [DOE]

    The Council on Environmental Quality (CEQ) issued water efficiency goal guidance in Federal Agency Implementation of Water Efficiency and Management Provisions of Executive Order 13514. This...

  2. Energy-Efficient Mortgages

    Broader source: Energy.gov [DOE]

    Homeowners can take advantage of energy efficient mortgages (EEM) to either finance energy efficiency improvements to existing homes, including renewable energy technologies, or to increase their...

  3. Computationally Efficient Modeling of High-Efficiency Clean Combustion...

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

    & Publications Computationally Efficient Modeling of High-Efficiency Clean Combustion Engines Computationally Efficient Modeling of High-Efficiency Clean Combustion Engines...

  4. Efficiency Nova Scotia Releases Energy Efficiency Mobile App...

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

    Efficiency Nova Scotia Releases Energy Efficiency Mobile App Efficiency Nova Scotia Releases Energy Efficiency Mobile App Graphic of the inside of a house, with table and chairs,...

  5. County Employment Of West Virginia Higher

    E-Print Network [OSTI]

    Mohaghegh, Shahab

    County Employment Of West Virginia Higher Education Graduates 2009 December 2010 Prepared for the West Virginia Higher Education Policy Commission By George W. Hammond, Associate Director Adam Hoffer with the West Virginia Higher Education Policy Commission. Opinions expressed herein are the responsibility

  6. TWISTING COCHAINS AND HIGHER TORSION KIYOSHI IGUSA

    E-Print Network [OSTI]

    Igusa, Kiyoshi

    of them is a higher algebraic K-theory class measured by higher FR torsion. Flat superconnections are also-theory 8 4. Higher FR torsion 10 5. Flat superconnections 12 6. Forms as operators 15 7. Chen's iterated) It is a combinatorial flat Z graded superconnection. 2000 Mathematics Subject Classification. Primary 57R22, Secondary

  7. Firm Size And Higher Education Graduate

    E-Print Network [OSTI]

    Mohaghegh, Shahab

    Firm Size And Higher Education Graduate Employment In West Virginia 2010 Summary Results For Work 2012 Prepared for the West Virginia Higher Education Policy Commission By George W. Hammond, Associate Corporation Funding for this research was provided by the West Virginia Higher Education Policy Commission

  8. From Higher Education To Work In West

    E-Print Network [OSTI]

    Mohaghegh, Shahab

    From Higher Education To Work In West Virginia 2008 Summary Results For Work Participation Achievement, Tuition Assistance, and Nearby States March 2010 Prepared for the West Virginia Higher Education Higher Education Policy Commission. Opinions expressed herein are the responsibility of the authors. #12

  9. From Higher Education To Work In West

    E-Print Network [OSTI]

    Mohaghegh, Shahab

    From Higher Education To Work In West Virginia 2007 Summary Results For Work Participation Prepared for the West Virginia Higher Education Policy Commission By George W. Hammond, Associate Director This research was conducted under contract with the West Virginia Higher Education Policy Commission. Opinions

  10. High Efficiency Engine Technologies Program

    SciTech Connect (OSTI)

    Rich Kruiswyk

    2010-07-13T23:59:59.000Z

    Caterpillar's Product Development and Global Technology Division carried out a research program on waste heat recovery with support from DOE (Department of Energy) and the DOE National Energy Technology Laboratory. The objective of the program was to develop a new air management and exhaust energy recovery system that would demonstrate a minimum 10% improvement in thermal efficiency over a base heavy-duty on-highway diesel truck engine. The base engine for this program was a 2007 C15 15.2L series-turbocharged on-highway truck engine with a LPL (low-pressure loop) exhaust recirculation system. The focus of the program was on the development of high efficiency turbomachinery and a high efficiency turbocompound waste heat recovery system. The focus of each area of development was as follows: (1) For turbine stages, the focus was on investigation and development of technologies that would improve on-engine exhaust energy utilization compared to the conventional radial turbines in widespread use today. (2) For compressor stages, the focus was on investigating compressor wheel design parameters beyond the range typically utilized in production, to determine the potential efficiency benefits thereof. (3) For turbocompound, the focus was on the development of a robust bearing system that would provide higher bearing efficiencies compared to systems used in turbocompound power turbines in production. None of the turbocharger technologies investigated involved addition of moving parts, actuators, or exotic materials, thereby increasing the likelihood of a favorable cost-value tradeoff for each technology. And the turbocompound system requires less hardware addition than competing bottoming cycle technologies, making it a more attractive solution from a cost and packaging standpoint. Main outcomes of the program are as follows: (1) Two turbine technologies that demonstrated up to 6% improvement in turbine efficiency on gas stand and 1-3% improvement in thermal efficiency in on-engine testing. (2) A compressor technology that demonstrated 1.5% improvement in compressor efficiency on gas stand compared to production available compressors. (3) A power turbine with high efficiency bearing system that demonstrated excellent rotordynamic stability throughout the required speed range, up to 60,000 rpm. (4) A predicted improvement (using engine simulation) in engine thermal efficiency of 7% at the peak torque design point, when combining the technologies developed in this program.

  11. Maryland Efficiency Program Options

    Broader source: Energy.gov [DOE]

    Maryland Efficiency Program Options, from the Tool Kit Framework: Small Town University Energy Program (STEP).

  12. Generalized structure of higher order nonclassicality

    E-Print Network [OSTI]

    Amit Verma; Anirban Pathak

    2009-01-21T23:59:59.000Z

    A generalized notion of higher order nonclassicality (in terms of higher order moments) is introduced. Under this generalized framework of higher order nonclassicality, conditions of higher order squeezing and higher order subpoissonian photon statistics are derived. A simpler form of the Hong-Mandel higher order squeezing criterion is derived under this framework by using an operator ordering theorem introduced by us in [J. Phys. A. 33 (2000) 5607]. It is also generalized for multi-photon Bose operators of Brandt and Greenberg. Similarly, condition for higher order subpoissonian photon statistics is derived by normal ordering of higher powers of number operator. Further, with the help of simple density matrices, it is shown that the higher order antibunching (HOA) and higher order subpoissonian photon statistics (HOSPS) are not the manifestation of the same phenomenon and consequently it is incorrect to use the condition of HOA as a test of HOSPS. It is also shown that the HOA and HOSPS may exist even in absence of the corresponding lower order phenomenon. Binomial state, nonlinear first order excited squeezed state (NLESS) and nonlinear vacuum squeezed state (NLVSS) are used as examples of quantum state and it is shown that these states may show higher order nonclssical characteristics. It is observed that the Binomial state which is always antibunched, is not always higher order squeezed and NLVSS which shows higher order squeezing does not show HOSPS and HOA. The opposite is observed in NLESS and consequently it is established that the HOSPS and HOS are two independent signatures of higher order nonclassicality

  13. Duality Groups, Automorphic Forms and Higher Derivative Corrections

    E-Print Network [OSTI]

    Neil Lambert; Peter West

    2007-02-21T23:59:59.000Z

    We study the higher derivative corrections that occur in type II superstring theories in ten dimensions or less. Assuming invariance under a discrete duality group G(Z) we show that the generic functions of the scalar fields that occur can be identified with automorphic forms. We then give a systematic method to construct automorphic forms from a given group G(Z) together with a chosen subgroup H and a linear representation of G(Z). This construction is based on the theory of non-linear realizations and we find that the automorphic forms contain the weights of G. We also carry out the dimensional reduction of the generic higher derivative corrections of the IIB theory to three dimensions and find that the weights of E_8 occur generalizing previous results of the authors on M-theory. Since the automorphic forms of this theory contain the weights of E_8 we can interpret the occurrence of weights in the dimensional reduction as evidence for an underlying U-duality symmetry.

  14. Lower Cost, Higher Performance Carbon Fiber

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

    of Energy Presentationname Questions for Today Materials How can the cost of carbon fiber suitable for higher performance applications (H 2 Storage) be developed? H 2...

  15. Building Energy Efficient Schools

    E-Print Network [OSTI]

    McClure, J. D.; Estes, J. M.

    1985-01-01T23:59:59.000Z

    Many new school buildings consume only half the energy required by similar efficient structures designed without energy performance as a design criterion. These are comfortable and efficient while construction costs remain about the same as those...

  16. Energy Efficiency Resource Standard

    Broader source: Energy.gov [DOE]

    In 2008, New Mexico enacted H.B. 305, the Efficient Use of Energy Act, which created an Energy Efficiency Resource Standard (EERS) for New Mexico’s electric utilities, and a requirement that all ...

  17. Energy Efficiency Strategies 

    E-Print Network [OSTI]

    Dillingham, G.

    2012-01-01T23:59:59.000Z

    their energy consumption to stay competitive. An alternative to reduced energy consumption is to put in place an energy efficiency strategy. However, while most plastic manufactures are aware of the energy efficiency opportunities in their facilities...

  18. Energy Efficiency Fund

    Broader source: Energy.gov [DOE]

    Note: The 2013 Three Year Efficiency Plans have not yet been approved. The process is underway. For the latest draft plan, review the Massachusetts Energy Efficiency Advisory Council [http://www.ma...

  19. Energy Efficiency Goals

    Broader source: Energy.gov [DOE]

    In 2009, Missouri enacted the Missouri Energy Efficiency Investment Act, creating energy efficiency sales and peak reduction goals to be met through investment in demand side management. The goals...

  20. On the Efficiency of Onetime Digital Signatures Daniel Bleichenbacher 1 and Ueli Maurer 2

    E-Print Network [OSTI]

    Maurer, Ueli

    On the Efficiency of One­time Digital Signatures Daniel Bleichenbacher 1 and Ueli Maurer 2 1 Bell based on trapdoor one­way functions such as the RSA system: higher efficiency and much more freedom. Several results on the achievable efficiency of such schemes are proved, where the efficiency of a scheme

  1. Advanced Organic Vapor Cycles for Improving Thermal Conversion Efficiency in Renewable Energy Systems

    E-Print Network [OSTI]

    Ho, Tony

    2012-01-01T23:59:59.000Z

    and higher efficiency photovoltaic systems. However, forphotovoltaic system such that reasonable solar-to-electric conversion efficienciesphotovoltaic co-generation scheme could have potentially very high solar-to-electric efficiency.

  2. Emerging National Concerns for Higher Education

    E-Print Network [OSTI]

    Emerging National Concerns for Higher Education (and Welcome Back) 2014 Annual Faculty Conference old news The STEM tide has been kind to us The Energy boom plays to our strengths #12;7 Public debt capacity for campuses July 2014, Moody's "negative outlook for US Higher Education What

  3. Distillation: The Efficient Workhorse

    E-Print Network [OSTI]

    Steinmeyer, D.

    DISTILLATION: THE EFFICIENT WORKHORSE Dan Steinmeyer Monsanto Company St. Louis, Missouri Distillation is inherently highly efficient: phase separation is clean it is relatively easy to build a mUltistage countercurrent device equilibrium... is closely approached on each stage Given the right perspective; the right application; and the right design - distillation is difficult to beat from an efficiency standpoint. ? The right perspective is that efficiency is the ratio of the work...

  4. Energy Efficiency Program Overview

    E-Print Network [OSTI]

    Mutiso,S.

    2014-01-01T23:59:59.000Z

    Energy Efficiency Program Overview Clean Air Through Energy Efficiency CATEE Conference November 18-20, 2014 Dallas, TX ESL-KT-14-11-02 CATEE 2014: Clean Air Through Efficiency Conference, Dallas, Texas Nov. 18-20 General Overview • State of Texas... enacted legislation requiring Transmission and Distribution utilities (TDUs) achieve annual goals for energy efficiency • Public Utility Commission of Texas (PUCT) implemented rules and guidelines for consistency among the TDU programs • Texas TDUs...

  5. Energy Efficiency Financing

    Office of Energy Efficiency and Renewable Energy (EERE)

    Information and examples of state financing for energy efficiency programs, with descriptions on implementation methods and concerns.

  6. Entergy Arkansas- CitySmart Quick Start Energy Efficiency Program

    Broader source: Energy.gov [DOE]

    The CitySmart Program is an energy efficiency program designed to provide financial incentives to public sector, K-12 schools, and higher education customers for the installation of a wide range of...

  7. Holographic Representation of Higher Spin Gauge Fields

    E-Print Network [OSTI]

    Debajyoti Sarkar; Xiao Xiao

    2014-11-17T23:59:59.000Z

    Extending the results of \\cite{Heem}, \\cite{KLRS} on the holographic representation of local gauge field operators in anti de Sitter space, here we construct the bulk operators for higher spin gauge fields in the leading order of $\\frac{1}{N}$ expansion. Working in holographic gauge for higher spin gauge fields, we show that gauge field operators with integer spin $s>1$ can be represented by an integration over a ball region, which is the interior region of the spacelike bulk lightcone on the boundary. The construction is shown to be AdS-covariant up to gauge transformations, and the two-point function between higher spin gauge fields and boundary higher spin current exhibit singularities on both bulk and boundary lightcones. We also comment on possible extension to the level of three-point functions and carry out a causal construction for higher spin fields in de Sitter spacetime.

  8. Particle acceleration efficiencies in astrophysical shear flows

    E-Print Network [OSTI]

    F. M. Rieger; P. Duffy

    2005-02-04T23:59:59.000Z

    The acceleration of energetic particles in astrophysical shear flows is analyzed. We show that in the presence of a non-relativistic gradual velocity shear, power law particle momentum distributions $f(p) \\propto p^{-(3+\\alpha)}$ may be generated, assuming a momentum-dependent scattering time $\\tau \\propto p^{\\alpha}$, with $\\alpha > 0$. We consider possible acceleration sites in astrophysical jets and study the conditions for efficient acceleration. It is shown, for example, that in the presence of a gradual shear flow and a gyro-dependent particle mean free path, synchrotron radiation losses no longer stop the acceleration once it has started to work efficiently. This suggests that shear acceleration may naturally account for a second, non-thermal population of energetic particles in addition to a shock-accelerated one. The possible relevance of shear acceleration is briefly discussed with reference to the relativistic jet in the quasar 3C 273.

  9. Managing Energy Efficiency Improvement

    E-Print Network [OSTI]

    Almaguer, J.

    2006-01-01T23:59:59.000Z

    efficiency opportunities as well as promote the use of energy efficient methodologies and technologies. If, as program results suggest, 15% to 20% of the gas that is now consumed at by plant operations can be saved through efficiencies, it would save $500...

  10. OPTIONS for ENERGY EFFICIENCY

    E-Print Network [OSTI]

    OPTIONS for ENERGY EFFICIENCY in EXISTING BUILDINGS December 2005 CEC-400-2005-039-CMF.B. Blevins Executive Director Valerie Hall Deputy Director Efficiency, Renewables and Demand Analysis Elaine Hussey Contract Manager #12;Acknowledgments The Efficiency Committee expresses its gratitude

  11. ENTRY LOBBY ENERGY EFFICIENCY

    E-Print Network [OSTI]

    Escher, Christine

    ENTRY LOBBY ENERGY EFFICIENCY Clerestory windows provide natural day-lighting.· Exterior roof SUSTAINABILITY FEATURES #12;ADMINISTRATION ENERGY EFFICIENCY High performance window glazing· minimizes heat gain. Skylights provide natural day-lighting.· High-efficiency lighting reduces energy· costs and heat gain

  12. Glowing Bacteria: Transformation Efficiency

    E-Print Network [OSTI]

    Rose, Michael R.

    1 Glowing Bacteria: Transformation Efficiency Purpose: To determine how well your E. coli cells took up and expressed GFP after transformation. Background: Transformation efficiency is a quantitative)______ (Fraction of DNA spread on plate) = ______ µg plasmid DNA spread on plate #12;2 5. Transformation efficiency

  13. Buildings Energy Efficiency Policy

    E-Print Network [OSTI]

    Oak Ridge National Laboratory

    Efficiency Wind Biomass Natural Gas Combined Cycle Nuclear Coal IGCC Photovoltaics RangeofBuildings Energy Efficiency Policy ­ A Brief History Steven Nadel Executive Director American Council for an Energy- Efficient Economy #12;U.S. Energy Use in Relation to GDP 1970-2008 0.0 50.0 100

  14. Efficiency bounds for nonequilibrium heat engines

    E-Print Network [OSTI]

    Pankaj Mehta; Anatoli Polkovnikov

    2013-01-22T23:59:59.000Z

    We analyze the efficiency of thermal engines (either quantum or classical) working with a single heat reservoir like atmosphere. The engine first gets an energy intake, which can be done in arbitrary non-equilibrium way e.g. combustion of fuel. Then the engine performs the work and returns to the initial state. We distinguish two general classes of engines where the working body first equilibrates within itself and then performs the work (ergodic engine) or when it performs the work before equilibrating (non-ergodic engine). We show that in both cases the second law of thermodynamics limits their efficiency. For ergodic engines we find a rigorous upper bound for the efficiency, which is strictly smaller than the equivalent Carnot efficiency. I.e. the Carnot efficiency can be never achieved in single reservoir heat engines. For non-ergodic engines the efficiency can be higher and can exceed the equilibrium Carnot bound. By extending the fundamental thermodynamic relation to nonequilibrium processes, we find a rigorous thermodynamic bound for the efficiency of both ergodic and non-ergodic engines and show that it is given by the relative entropy of the non-equilibrium and initial equilibrium distributions.These results suggest a new general strategy for designing more efficient engines. We illustrate our ideas by using simple examples.

  15. Assessing the efficiency of US electricity markets

    SciTech Connect (OSTI)

    Arciniegas, I. E. (Ismael E.); Barrett, C. L. (Christopher L.); Marathe, A. (Achla)

    2001-01-01T23:59:59.000Z

    The recent California's energy crisis has raised doubts about the benefits of energy deregulation. While it is true that the California electricity market is in turmoil, other electricity markets like the Pennsylvania-New Jersey-Maryland (PJM) are doing fine. This paper assesses the mark of efficiency reached by the electricity markets in California, New York, and PJM. It also compares the degree of efficiency across markets (forward vs. real time) and across time. In terms of market efficiency no significant differences between the California and PJM electricity markets were discovered in the year of California's energy crisis (2000). This research suggests that differences in price behavior between these two markets during 2000 did not arise from differences in efficiency. According to our analysis and measure of efficiency, PJM and California electricity markets are more efficient than the New York market. Also, as these markets become more mature over time, their efficiency goes up. We also found evidence that multi-settlement scheduling system leads to higher efficiency.

  16. Improved Dye-Sensitized Solar Cell (DSSC) for Higher Energy Conversion Efficiency

    Energy Innovation Portal (Marketing Summaries) [EERE]

    2013-10-17T23:59:59.000Z

    A University of Colorado research group led by Rich Noble has developed a novel approach to dye-sensitized solar cells that increases solar-to-electrical energy conversion....

  17. Anti-reflection zinc oxide nanocones for higher efficiency thin-film silicon solar cells

    E-Print Network [OSTI]

    Mailoa, Jonathan P

    2012-01-01T23:59:59.000Z

    Thin film silicon solar cells, which are commonly made from microcrystalline silicon ([mu]c-Si) or amorphous silicon (a-Si), have been considered inexpensive alternatives to thick polycrystalline silicon (polysilicon) solar ...

  18. Silicon Ink Technology Offers Path to Higher Efficiency Solar Cells at

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onYouTube YouTube Note: Since the.pdfBreakingMay 2015ParentsMiddle|SecurityDepartmentShawn Wang About UsShirleyLower Cost

  19. Silicon Ink Technology Offers Path to Higher Efficiency Solar Cells at

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative JC3 RSS September 9,AwardGrads &AlternativeDepartmentServicesScienceSign Up for

  20. Energy-Efficient Lighting The typical American family spends more

    E-Print Network [OSTI]

    Energy-Efficient Lighting The typical American family spends more than $1,500 a year on household their energy efficiency is taken into account. CFLs last 8­10 times longer than standard incandescent bulbs energy bills--and many households spend considerably more. Costs could climb even higher in the future

  1. Unmasking online reflective practices in higher education 

    E-Print Network [OSTI]

    Ross, Jennifer

    2012-06-29T23:59:59.000Z

    Online reflective practices that are high-stakes – summatively assessed, or used as evidence for progression or membership in a professional body – are increasingly prevalent in higher education, especially in professional ...

  2. The Deng algorithm in higher dimensions

    E-Print Network [OSTI]

    Y. Nyonyi; S. D. Maharaj; K. S. Govinder

    2014-12-28T23:59:59.000Z

    We extend an algorithm of Deng in spherically symmetric spacetimes to higher dimensions. We show that it is possible to integrate the generalised condition of pressure isotropy and generate exact solutions to the Einstein field equations for a shear-free cosmological model with heat flow in higher dimensions. Three new metrics are identified which contain results of four dimensions as special cases. We show graphically that the matter variables are well behaved and the speed of sound is causal.

  3. Holographic Superconductors and Higher Curvature Corrections

    E-Print Network [OSTI]

    Massimo Siani

    2011-11-14T23:59:59.000Z

    We study a fully backreacted holographic model of a four-dimensional superconductor by including a higher curvature interaction in the bulk action. We study how the critical temperature and the field theory condensate vary in this model and conclude that positive higher curvature couplings make the condensation harder. We also compute the conductivity, finding significant deviations from the conjectured universal frequency gap to critical temperature ratio.

  4. Energy Efficiency Indicators Methodology Booklet

    E-Print Network [OSTI]

    Sathaye, Jayant

    2010-01-01T23:59:59.000Z

    Tracking Industrial Eneergy Efficiency and Co2 Emissions”.2000 NRCAN, 2006. Energy Efficiency Trends in Canada 1990 toCanada’s Office of Energy Efficiency, Ottawa. NRCAN, 2009.

  5. Energy Efficiency: A Priority 

    E-Print Network [OSTI]

    Patenaude, R.

    2013-01-01T23:59:59.000Z

    Energy Efficiency: A Priority October 9th 2013 2 Energy efficiency: a priority NBC profile (April 30th, 2013) 1st financial institution in Quebec 19 920 employees 451 branches in Canada 2,4 million individual clients 3 Energy efficiency: a... priority Energenia?s profile Consulting firm specializing exclusively in energy efficency Founded by Robert Patenaude in 2003 National Bank?s main partner for the development, implementation and supervision of the energy efficiciency program since...

  6. Energy Efficiency: A Priority

    E-Print Network [OSTI]

    Patenaude, R.

    2013-01-01T23:59:59.000Z

    Energy Efficiency: A Priority October 9th 2013 2 Energy efficiency: a priority NBC profile (April 30th, 2013) 1st financial institution in Quebec 19 920 employees 451 branches in Canada 2,4 million individual clients 3 Energy efficiency: a... priority Energenia?s profile Consulting firm specializing exclusively in energy efficency Founded by Robert Patenaude in 2003 National Bank?s main partner for the development, implementation and supervision of the energy efficiciency program since...

  7. Bearwall Energy Efficient Solutions

    E-Print Network [OSTI]

    Sovero,M.

    2014-01-01T23:59:59.000Z

    CATEE Conference November 20, 2014 ENERGY EFFICIENT SOLUTIONS ESL-KT-14-11-06 CATEE 2014: Clean Air Through Efficiency Conference, Dallas, Texas Nov. 18-20 Brief History of Bearwall… Who We Are: ? Manuel Sovero ? Luis Osorio Energy Conservation... Experience: ESL-KT-14-11-06 CATEE 2014: Clean Air Through Efficiency Conference, Dallas, Texas Nov. 18-20 Energy Programs… ESL-KT-14-11-06 CATEE 2014: Clean Air Through Efficiency Conference, Dallas, Texas Nov. 18-20 Bearwall Methodology… Introduction...

  8. Appliance Efficiency Regulations

    Broader source: Energy.gov [DOE]

    Note: The federal government has imposed and updated appliance efficiency standards through several legislative acts,* and now has standards in place or under development for 30 classes of...

  9. Energy Efficiency Links

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

    to research, develop, and use advanced energy efficiency, renewable energy, pollution prevention technologies for industrial customers. The site includes information on...

  10. Energy Efficiency Product Standards

    Broader source: Energy.gov [DOE]

    '' Note: The federal government has imposed and updated appliance efficiency standards through several legislative acts,* and now has standards in place or under development for 30 classes of...

  11. Efficient Water Use & Management

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

    Water Use Goal 4: Efficient Water Use & Management Aware of the arid climate of northern New Mexico, water reduction and conservation remains a primary concern at LANL. Energy...

  12. Efficiency Maine Trust

    Broader source: Energy.gov [DOE]

    Maine's public benefits fund for energy efficiency was authorized originally in 1997 by the state's electric-industry restructuring legislation. Under the initial arrangement, the administration of...

  13. Energy Efficiency Fund

    Broader source: Energy.gov [DOE]

    Connecticut's original electric-industry restructuring legislation (Public Act 98-28), enacted in April 1998, created separate funds to support energy efficiency and renewable energy.* The...

  14. PROGRESS IN ENERGY EFFICIENT BUILDINGS

    E-Print Network [OSTI]

    Wall, L.W.

    2009-01-01T23:59:59.000Z

    the case for building energy-efficiency labels. 3.1 Trendsenergy efficiency. Building energy efficiency labels are anThe use of building energy efficiency labels may be the

  15. High Efficiency Solar Integrated Roof Membrane Product

    SciTech Connect (OSTI)

    Partyka, Eric; Shenoy, Anil

    2013-05-15T23:59:59.000Z

    This project was designed to address the Solar Energy Technology Program objective, to develop new methods to integrate photovoltaic (PV) cells or modules within a building-integrated photovoltaic (BIPV) application that will result in lower installed cost as well as higher efficiencies of the encapsulated/embedded PV module. The technology assessment and development focused on the evaluation and identification of manufacturing technologies and equipment capable of producing such low-cost, high-efficiency, flexible BIPV solar cells on single-ply roofing membranes.

  16. Off-Campus Housing Resource Center DISCLAIMER: Please keep in mind that the University assumes no responsibility for contracts/leases between individuals. The Off-Campus Housing Resource Center is not responsible

    E-Print Network [OSTI]

    Kounaves, Samuel P.

    Off-Campus Housing Resource Center DISCLAIMER: Please keep in mind that the University assumes no responsibility for contracts/leases between individuals. The Off-Campus Housing Resource Center is not responsible or liable for the consequences of any off-campus student housing arrangement. In addition, Tufts

  17. Efficiency in Quantum Key Distribution Protocols using entangled Gaussian states

    E-Print Network [OSTI]

    Carles Rodó

    2010-05-14T23:59:59.000Z

    Efficiency is a key issue in any real implementation of a cryptographic protocol since the physical resources are not unlimited. We will first show that Quantum Key Distribution is possible with an "Entanglement based" scheme with NPPT symmetric Gaussian states in spite of the fact that these systems cannot be distilled with Gaussian operations (they are all bound entangled). In this work we analyze the secrecy properties of Gaussian states under Gaussian operations. Although such operations are useless for quantum distillation, we prove that it is possible to distill efficiently a secret key secure against finite coherent attacks from sufficiently entangled Gaussian states with non-positive partial transposition. Moreover, all such states allow for efficient key distillation, when the eavesdropper is assumed to perform individual attacks before in an efficient way.

  18. Belief space planning assuming maximum likelihood observations

    E-Print Network [OSTI]

    Lozano-Perez, Tomas

    observations are modelled as Gaussian noise. Given this model of the dynamics, two planning and control methods-locating the sensors with the contacts this way complicates planning and control because it forces the system to trade of the partially observable control problem, often modeled as a partially observable Markov decision process (POMDP

  19. Westinghouse TRU Solutions LLC Assumes WIPP Operations

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over OurThe Iron SpinPrincetonUsing Maps1DOETHEWeekly ReportsWenjunTRUOffersEddy

  20. Group manifold approach to higher spin theory

    E-Print Network [OSTI]

    Hu, Shan

    2015-01-01T23:59:59.000Z

    We consider the group manifold approach to higher spin theory. The deformed higher spin transformation is realized as the diffeomorphism transformation on group manifold $\\textbf{M}$. With the suitable rheonomy condition and the torsion constraint imposed, the unfolded equation can be obtained from the Bianchi identity, by solving which, fields on $\\textbf{M}$ is determined by the multiplet at one point, or equivalently, by $(W^{[a(s-1),b(0)]}_{\\mu},H)$ on $AdS_{4}\\subset \\textbf{M}$. Although the space is extended to $\\textbf{M}$ to get the geometrical formulation, the dynamical degrees of freedom is still in $AdS_{4}$. We also discuss the theory with the global higher spin symmetry, which is in parallel with the WZ model in supersymmetry.

  1. Spinning particles and higher spin field equations

    E-Print Network [OSTI]

    Bastianelli, Fiorenzo; Corradini, Olindo; Latini, Emanuele

    2015-01-01T23:59:59.000Z

    Relativistic particles with higher spin can be described in first quantization using actions with local supersymmetry on the worldline. First, we present a brief review of these actions and their use in first quantization. In a Dirac quantization scheme the field equations emerge as Dirac constraints on the Hilbert space, and we outline how they lead to the description of higher spin fields in terms of the more standard Fronsdal-Labastida equations. Then, we describe how these actions can be extended so that the propagating particle is allowed to take different values of the spin, i.e. carry a reducible representation of the Poincar\\'e group. This way one may identify a four dimensional model that carries the same degrees of freedom of the minimal Vasiliev's interacting higher spin field theory. Extensions to massive particles and to propagation on (A)dS spaces are also briefly commented upon.

  2. The efficiency of resonant relaxation around a massive black hole

    E-Print Network [OSTI]

    Ehud Eilon; Gábor Kupi; Tal Alexander

    2008-07-09T23:59:59.000Z

    Resonant relaxation (RR) is a rapid relaxation process that operates in the nearly-Keplerian potential near a massive black hole (MBH). RR dominates the dynamics of compact remnants that inspiral into a MBH and emit gravitational waves (extreme mass ratio inspiral events, EMRIs). RR can either increase the EMRI rate, or strongly suppress it, depending on its still poorly-determined efficiency. We use small-scale Newtonian N-body simulations to measure the RR efficiency and to explore its possible dependence on the stellar number density profile around the MBH, and the mass-ratio between the MBH and a star (a single-mass stellar population is assumed). We develop an efficient and robust procedure for detecting and measuring RR in N-body simulations. We present a suite of simulations with a range of stellar density profiles and mass-ratios, and measure the mean RR efficiency in the near-Keplerian limit. We do not find a statistically significant dependence on the density profile or the mass-ratio. Our numerical determination of the RR efficiency in the Newtonian, single-mass population approximations, suggests that RR will likely enhance the EMRI rate by a factor of a few over the rates predicted assuming only slow stochastic two-body relaxation.

  3. Anisotropic higher derivative gravity and inflationary universe

    E-Print Network [OSTI]

    W. F. Kao

    2006-05-21T23:59:59.000Z

    Stability analysis of the Kantowski-Sachs type universe in pure higher derivative gravity theory is studied in details. The non-redundant generalized Friedmann equation of the system is derived by introducing a reduced one dimensional generalized KS type action. This method greatly reduces the labor in deriving field equations of any complicate models. Existence and stability of inflationary solution in the presence of higher derivative terms are also studied in details. Implications to the choice of physical theories are discussed in details in this paper.

  4. Scalable, efficient epidemiological simulation

    SciTech Connect (OSTI)

    Eubank, S. G. (Stephen G.)

    2001-01-01T23:59:59.000Z

    We describe the design and implementation of a system for simulating the spread of disease among individuals in a large urban population over the course of several weeks, In contrast to traditional approaches, we do not assume uniform mixing among large sub-populations or split the population into spatial or demographic subpopulations determined a priori. Instead, we rely on empirical estimates of the social network, or contact patterns, that are produced by TRANSIMS, a large-scale simulation of transportation systems.

  5. Dashboards in Higher UMACRAO/WACRAO Joint

    E-Print Network [OSTI]

    Wisconsin at Madison, University of

    Dashboards in Higher Education UMACRAO/WACRAO Joint Conference November 1-3, 2006 Phil Hull charts, pie charts and gauges are usually set in a portal-like environment that is often role for Short Term Decision Making Transactional Current, Unit Record Level Data Used for Daily Operational

  6. Higher Derivative D-brane Couplings

    E-Print Network [OSTI]

    Guo, Guangyu

    2012-10-19T23:59:59.000Z

    supersymmetry. In the third part, we obtain the higher derivative D-brane action by using both linearized T-duality and string disc amplitude computation. We evaluate disc amplitude of one R-R field C^(p-3) and two NS-NS fields in the presence of a single Dp...

  7. Regulation XVIII: GENERAL REGULATIONS FOR HIGHER DEGREES,

    E-Print Network [OSTI]

    Regulation XVIII: GENERAL REGULATIONS FOR HIGHER DEGREES, POSTGRADUATE DIPLOMAS AND POSTGRADUATE CERTIFICATES SCOPE OF THESE REGULATIONS 1. These Regulations apply to the Degree of PhD in all Faculties in all Faculties Postgraduate Certificates in all Faculties. 2. These Regulations are subject

  8. HIGHER EDUCATION FACILITIES MANAGEMENT: READY FOR INTERNATIONALIZATION?

    E-Print Network [OSTI]

    Aizuddin, N.; Yahya, M.

    and it equipment, furniture and fixtures to improve the organization’s ability to compete successfully in a fast changing world. The facilities of a Higher Education Institution (HEI) like Universiti Teknologi Malaysia are one of its most valuable assets and must...

  9. Construction of Higher Order Finite Element with

    E-Print Network [OSTI]

    Kern, Michel

    ' & $ % Construction of Higher Order Finite Element with Mass Lumping Using Computer Algebra. (3D, combinatorial analysis, new third order element) 2 #12; ' & $ % Guidelines for the construction of nodes must be ~ P k unisolvent. 2. Finite element must be continuous. 3. Quadrature formula must satisfy

  10. Broadband, Higher Education and Rural New Mexico

    E-Print Network [OSTI]

    Maccabe, Barney

    Broadband, Higher Education and Rural New Mexico Gil Gonzales, Ph.D., Chief Information Officer University of New Mexico, Albuquerque, NM 87131 E mail: gonzgil@unm.edu Background UNM students enjoy the country do. New Mexico is also home to two national laboratories in Los Alamos (Los Alamos National

  11. The Efficient Windows Collaborative

    SciTech Connect (OSTI)

    Petermann, Nils

    2006-03-31T23:59:59.000Z

    The Efficient Windows Collaborative (EWC) is a coalition of manufacturers, component suppliers, government agencies, research institutions, and others who partner to expand the market for energy efficient window products. Funded through a cooperative agreement with the U.S. Department of Energy, the EWC provides education, communication and outreach in order to transform the residential window market to 70% energy efficient products by 2005. Implementation of the EWC is managed by the Alliance to Save Energy, with support from the University of Minnesota and Lawrence Berkeley National Laboratory.

  12. Efficiently Controllable Graphs

    E-Print Network [OSTI]

    Can Gokler; Kevin Thompson; Peter Shor; Seth Lloyd

    2015-03-18T23:59:59.000Z

    We show that universal quantum computation can be performed efficiently on quantum networks while the fraction of controlled subsystems vanishes as the network grows larger. We provide examples of quantum spin network families admitting polynomial quantum gate complexity with a vanishing fraction of controlled spins. We define a new family of graphs, the efficiently controllable family, which admits efficient computation with vanishing fraction of controls. We explore generalizations to percolation clusters, fractals and random graphs. We show that the classical computational complexity of estimating the ground state of Hamiltonians described by controllable graphs is polynomial in the number of subsystems/qubits.

  13. ABJ Theory in the Higher Spin Limit

    E-Print Network [OSTI]

    Shinji Hirano; Masazumi Honda; Kazumi Okuyama; Masaki Shigemori

    2015-04-27T23:59:59.000Z

    We study the conjecture made by Chang, Minwalla, Sharma, and Yin on the duality between the N=6 Vasiliev higher spin theory on AdS_4 and the N=6 Chern-Simons-matter theory, so-called ABJ theory, with gauge group U(N) x U(N+M). Building on our earlier results on the ABJ partition function, we develop the systematic 1/M expansion, corresponding to the weak coupling expansion in the higher spin theory, and compare the leading 1/M correction, with our proposed prescription, to the one-loop free energy of the N=6 Vasiliev theory. We find an agreement between the two sides up to an ambiguity that appears in the bulk one-loop calculation.

  14. Higher modulus compositions incorporating particulate rubber

    DOE Patents [OSTI]

    Bauman, Bernard D. (Emmaus, PA); Williams, Mark A. (Souderton, PA); Bagheri, Reza (Bethlehem, PA)

    1997-12-02T23:59:59.000Z

    Rubber particles, to be used as fillers or extenders for various composite polymer systems, are chlorinated by a gas-solid phase reaction with a chlorine-containing gas. A composite polymer containing the chlorinated rubber fillers or extenders exhibits a higher flexural modulus than if prepared using an unchlorinated rubber filler or extender. Chlorination of the rubber particles is carried out by contacting the finely divided rubber particles with a chlorine-containing gas comprising at least about 5 volume percent chlorine. Advantageously, the chlorine can be diluted with air, nitrogen or other essentially inert gases and may contain minor amounts of fluorine. Improved performance is obtained with nitrogen dilution of the chlorine gas over air dilution. Improved polymer composite systems having higher flexural modulus result from the use of the chlorinated rubber particles as fillers instead of unchlorinated rubber particles.

  15. Higher modulus compositions incorporating particulate rubber

    DOE Patents [OSTI]

    McInnis, E.L.; Scharff, R.P.; Bauman, B.D.; Williams, M.A.

    1995-01-17T23:59:59.000Z

    Rubber particles, to be used as fillers or extenders for various composite polymer systems, are chlorinated by a gas-solid phase reaction with a chlorine-containing gas. A composite polymer containing the chlorinated rubber fillers or extenders exhibits a higher flexural modulus than if prepared using an unchlorinated rubber filler or extender. Chlorination of the rubber particles is carried out by contacting the finely divided rubber particles with a chlorine-containing gas comprising at least about 5 volume percent chlorine. Advantageously, the chlorine can be diluted with air, nitrogen or other essentially inert gases and may contain minor amounts of fluorine. Improved performance is obtained with nitrogen dilution of the chlorine gas over air dilution. Improved polymer composite systems having higher flexural modulus result from the use of the chlorinated rubber particles as fillers instead of unchlorinated rubber particles. 2 figures.

  16. Higher modulus compositions incorporating particulate rubber

    SciTech Connect (OSTI)

    McInnis, Edwin L. (Allentown, PA); Scharff, Robert P. (Louisville, KY); Bauman, Bernard D. (Emmaus, PA); Williams, Mark A. (Souderton, PA)

    1995-01-01T23:59:59.000Z

    Rubber particles, to be used as fillers or extenders for various composite polymer systems, are chlorinated by a gas-solid phase reaction with a chlorine-containing gas. A composite polymer containing the chlorinated rubber fillers or extenders exhibits a higher flexural modulus than if prepared using an unchlorinated rubber filler or extender. Chlorination of the rubber particles is carried out by contacting the finely divided rubber particles with a chlorine-containing gas comprising at least about 5 volume percent chlorine. Advantageously, the chlorine can be diluted with air, nitrogen or other essentially inert gases and may contain minor amounts of fluorine. Improved performance is obtained with nitrogen dilution of the chlorine gas over air dilution. Improved polymer composite systems having higher flexural modulus result from the use of the chlorinated rubber particles as fillers instead of unchlorinated rubber particles.

  17. Higher modulus compositions incorporating particulate rubber

    SciTech Connect (OSTI)

    Bauman, B.D.; Williams, M.A.; Bagheri, R.

    1997-12-02T23:59:59.000Z

    Rubber particles, to be used as fillers or extenders for various composite polymer systems, are chlorinated by a gas-solid phase reaction with a chlorine-containing gas. A composite polymer containing the chlorinated rubber fillers or extenders exhibits a higher flexural modulus than if prepared using an unchlorinated rubber filler or extender. Chlorination of the rubber particles is carried out by contacting the finely divided rubber particles with a chlorine-containing gas comprising at least about 5 volume percent chlorine. Advantageously, the chlorine can be diluted with air, nitrogen or other essentially inert gases and may contain minor amounts of fluorine. Improved performance is obtained with nitrogen dilution of the chlorine gas over air dilution. Improved polymer composite systems having higher flexural modulus result from the use of the chlorinated rubber particles as fillers instead of unchlorinated rubber particles. 2 figs.

  18. Higher modulus compositions incorporating particulate rubber

    SciTech Connect (OSTI)

    McInnis, Edwin L. (Allentown, PA); Bauman, Bernard D. (Emmaus, PA); Williams, Mark A. (Souderton, PA)

    1996-04-09T23:59:59.000Z

    Rubber particles, to be used as fillers or extenders for various composite polymer systems, are chlorinated by a gas-solid phase reaction with a chlorine-containing gas. A composite polymer containing the chlorinated rubber fillers or extenders exhibits a higher flexural modulus than if prepared using an unchlorinated rubber filler or extender. Chlorination of the rubber particles is carried out by contacting the finely divided rubber particles with a chlorine-containing gas comprising at least about 5 volume percent chlorine. Advantageously, the chlorine can be diluted with air, nitrogen or other essentially inert gases and may contain minor amounts of fluorine. Improved performance is obtained with nitrogen dilution of the chlorine gas over air dilution. Improved polymer composite systems having higher flexural modulus result from the use of the chlorinated rubber particles as fillers instead of unchlorinated rubber particles.

  19. Higher modulus compositions incorporating particulate rubber

    DOE Patents [OSTI]

    McInnis, E.L.; Bauman, B.D.; Williams, M.A.

    1996-04-09T23:59:59.000Z

    Rubber particles, to be used as fillers or extenders for various composite polymer systems, are chlorinated by a gas-solid phase reaction with a chlorine-containing gas. A composite polymer containing the chlorinated rubber fillers or extenders exhibits a higher flexural modulus than if prepared using an unchlorinated rubber filler or extender. Chlorination of the rubber particles is carried out by contacting the finely divided rubber particles with a chlorine-containing gas comprising at least about 5 volume percent chlorine. Advantageously, the chlorine can be diluted with air, nitrogen or other essentially inert gases and may contain minor amounts of fluorine. Improved performance is obtained with nitrogen dilution of the chlorine gas over air dilution. Improved polymer composite systems having higher flexural modulus result from the use of the chlorinated rubber particles as fillers instead of unchlorinated rubber particles. 2 figs.

  20. Enhanced Coset Symmetries and Higher Derivative Corrections

    E-Print Network [OSTI]

    Neil Lambert; Peter West

    2006-08-17T23:59:59.000Z

    After dimensional reduction to three dimensions, the lowest order effective actions for pure gravity, M-theory and the Bosonic string admit an enhanced symmetry group. In this paper we initiate study of how this enhancement is affected by the inclusion of higher derivative terms. In particular we show that the coefficients of the scalar fields associated to the Cartan subalgebra are given by weights of the enhanced symmetry group.

  1. Premium Efficient Motors

    E-Print Network [OSTI]

    Moser, P. R.

    1984-01-01T23:59:59.000Z

    Premium efficient motors are available which convert electrical energy into mechanical energy with fewer losses than the more standard motors. The fewer losses in these motors are due to changes in the motor design and improved manufacturing methods...

  2. Energy Efficiency Resource Standard

    Broader source: Energy.gov [DOE]

    The California Legislature emphasized the importance of energy efficiency and established broad goals with the enactment of Assembly Bill 2021 of 2006. The bill calls for a 10% reduction in forec...

  3. Improving Fired Heater Efficiency 

    E-Print Network [OSTI]

    Shriver, J. E.

    1983-01-01T23:59:59.000Z

    1982. 2, Fehervari, Willi, "Gas Measurement and Control for Pipeline Systems," The Foxboro Company. 3. Shriver, James, "CO/02 Boiler Control: Point Is Vi tal," POWER, October 1982. Set 1\\. Dukelow, Samuel, "Improving Boiler Efficiency...

  4. Energy Efficiency Resource Standard

    Broader source: Energy.gov [DOE]

    The California Legislature emphasized the importance of energy efficiency and established broad goals with the enactment of [http://docs.cpuc.ca.gov/word_pdf/FINAL_DECISION/85995.pdf Assembly Bill...

  5. Compressed Air Supply Efficiency 

    E-Print Network [OSTI]

    Joseph, B.

    2004-01-01T23:59:59.000Z

    COMPRESSED AIR SUPPLY EFFICENCY Babu Joseph, Ph.D., P.E. Engineer Southern California Edison Irwindale, CA ABSTRACT This project, under contract from California Energy Commission, developed the CASE (Compressed Air Supply Efficiency...

  6. Hardware/Software Co-design for Energy-Efficient Seismic Modeling

    E-Print Network [OSTI]

    Hardware/Software Co-design for Energy-Efficient Seismic Modeling Jens Krueger , David Donofrio of conventional cluster technology has prompted investigation of architectural alternatives that offer higher computational efficiency. In this work, we compare the per- formance and energy efficiency of three

  7. Energy-Efficient Modulation Design for Reliable Communication in Wireless Networks

    E-Print Network [OSTI]

    Gursoy, Mustafa Cenk

    Energy-Efficient Modulation Design for Reliable Communication in Wireless Networks Qing Chen transmit power scenarios. We have noted that variable power schemes can attain higher energy-efficiencies. The analysis of energy-efficient modulation design is also conducted in multi- hop linear networks

  8. The efficiency of mitochondrial electron transport chain is increased in the long-lived mrg19

    E-Print Network [OSTI]

    Babu, M. Madan

    The efficiency of mitochondrial electron transport chain is increased in the long-lived mrg19 mtROS and contribute to longevity. This increased mitochondrial efficiency (i.e. low mtROS generated the observed higher mito- chondrial efficiency in the long-lived mrg19 mutant of Saccharomyces cerevisiae

  9. High-Efficiency Solar Cells for Large-Scale Electricity Generation

    SciTech Connect (OSTI)

    Kurtz, S.; Olson, J.; Geisz, J.; Friedman, D.; McMahon, W.; Ptak, A.; Wanlass, M.; Kibbler, A.; Kramer, C.; Bertness, K.; Ward, S.; Duda, A.; Young, M.; Carapella, J.; Steiner, M.

    2008-09-26T23:59:59.000Z

    One strategy for helping the solar industry to grow faster is to use very high efficiency cells under concentrating optics. By using lenses or mirrors to concentrate the light, very small solar cells can be used, reducing the amount of semiconductor material and allowing use of higher efficiency cells, which are now >40% efficient.

  10. Efficient Windows Collaborative

    SciTech Connect (OSTI)

    Nils Petermann

    2010-02-28T23:59:59.000Z

    The project goals covered both the residential and commercial windows markets and involved a range of audiences such as window manufacturers, builders, homeowners, design professionals, utilities, and public agencies. Essential goals included: (1) Creation of 'Master Toolkits' of information that integrate diverse tools, rating systems, and incentive programs, customized for key audiences such as window manufacturers, design professionals, and utility programs. (2) Delivery of education and outreach programs to multiple audiences through conference presentations, publication of articles for builders and other industry professionals, and targeted dissemination of efficient window curricula to professionals and students. (3) Design and implementation of mechanisms to encourage and track sales of more efficient products through the existing Window Products Database as an incentive for manufacturers to improve products and participate in programs such as NFRC and ENERGY STAR. (4) Development of utility incentive programs to promote more efficient residential and commercial windows. Partnership with regional and local entities on the development of programs and customized information to move the market toward the highest performing products. An overarching project goal was to ensure that different audiences adopt and use the developed information, design and promotion tools and thus increase the market penetration of energy efficient fenestration products. In particular, a crucial success criterion was to move gas and electric utilities to increase the promotion of energy efficient windows through demand side management programs as an important step toward increasing the market share of energy efficient windows.

  11. Efficiency enhancement of a two-beam free-electron laser

    SciTech Connect (OSTI)

    Rouhani, M. H.; Maraghechi, B.; Saberi, H. [Department of Physics, Amirkabir University of Technology, 15875-4413 Tehran (Iran, Islamic Republic of)

    2009-12-15T23:59:59.000Z

    A local and nonlinear simulation of two-beam and tapered free-electron laser (FEL) is presented self-consistently. The slippage of the electromagnetic wave with respect to the electron beam is ignored and the relativistic electron beams are assumed to be cold. The fundamental resonance and the third harmonic radiation of the beam with lower energy are considered, in which the third harmonic is at the fundamental resonance of the beam with higher energy. The wiggler field is set to decrease linearly when the radiation of the third harmonic saturates. The optimum starting point of tapering and the slope of the reduction in the amplitude of wiggler are found by successive run of the code. Using the slowly varying envelope approximation, a set of nonlinear equations is derived which describes this system. These equations are solved numerically by the Runge-Kutta method. This method can be used to improve the efficiency of the two-beam FEL in the extreme ultraviolet and x-ray regions of spectrum.

  12. Eco-efficiency Indicators: Measuring Resource-use Efficiency...

    Open Energy Info (EERE)

    efficiency Indicators: Measuring Resource-use Efficiency and the Impact of Economic Activities on the Environment Jump to: navigation, search Tool Summary LAUNCH TOOL Name:...

  13. Green Light-Emitting Diode Makes Highly Efficient White Light; The Spectrum of Clean Energy Innovation (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2010-06-01T23:59:59.000Z

    Fact sheet describing NREL's green light emitting diode that can lead to higher efficiency white light used in indoor lighting applications.

  14. High Efficiency, Clean Combustion

    SciTech Connect (OSTI)

    Donald Stanton

    2010-03-31T23:59:59.000Z

    Energy use in trucks has been increasing at a faster rate than that of automobiles within the U.S. transportation sector. According to the Energy Information Administration (EIA) Annual Energy Outlook (AEO), a 23% increase in fuel consumption for the U.S. heavy duty truck segment is expected between 2009 to 2020. The heavy duty vehicle oil consumption is projected to grow between 2009 and 2050 while light duty vehicle (LDV) fuel consumption will eventually experience a decrease. By 2050, the oil consumption rate by LDVs is anticipated to decrease below 2009 levels due to CAFE standards and biofuel use. In contrast, the heavy duty oil consumption rate is anticipated to double. The increasing trend in oil consumption for heavy trucks is linked to the vitality, security, and growth of the U.S. economy. An essential part of a stable and vibrant U.S. economy is a productive U.S. trucking industry. Studies have shown that the U.S. gross domestic product (GDP) is strongly correlated to freight transport. Over 90% of all U.S. freight tonnage is transported by diesel power and over 75% is transported by trucks. Given the vital role that the trucking industry plays in the economy, improving the efficiency of the transportation of goods was a central focus of the Cummins High Efficient Clean Combustion (HECC) program. In a commercial vehicle, the diesel engine remains the largest source of fuel efficiency loss, but remains the greatest opportunity for fuel efficiency improvements. In addition to reducing oil consumption and the dependency on foreign oil, this project will mitigate the impact on the environment by meeting US EPA 2010 emissions regulations. Innovation is a key element in sustaining a U.S. trucking industry that is competitive in global markets. Unlike passenger vehicles, the trucking industry cannot simply downsize the vehicle and still transport the freight with improved efficiency. The truck manufacturing and supporting industries are faced with numerous challenges to reduce oil consumption and greenhouse gases, meet stringent emissions regulations, provide customer value, and improve safety. The HECC program successfully reduced engine fuel consumption and greenhouse gases while providing greater customer valve. The US EPA 2010 emissions standard poses a significant challenge for developing clean diesel powertrains that meet the DoE Vehicle Technologies Multi-Year Program Plan (MYPP) for fuel efficiency improvement while remaining affordable. Along with exhaust emissions, an emphasis on heavy duty vehicle fuel efficiency is being driven by increased energy costs as well as the potential regulation of greenhouse gases. An important element of the success of meeting emissions while significantly improving efficiency is leveraging Cummins component technologies such as fuel injection equipment, aftertreatment, turbomahcinery, electronic controls, and combustion systems. Innovation in component technology coupled with system integration is enabling Cummins to move forward with the development of high efficiency clean diesel products with a long term goal of reaching a 55% peak brake thermal efficiency for the engine plus aftertreatment system. The first step in developing high efficiency clean products has been supported by the DoE co-sponsored HECC program. The objectives of the HECC program are: (1) To design and develop advanced diesel engine architectures capable of achieving US EPA 2010 emission regulations while improving the brake thermal efficiency by 10% compared to the baseline (a state of the art 2007 production diesel engine). (2) To design and develop components and subsystems (fuel systems, air handling, controls, etc) to enable construction and development of multi-cylinder engines. (3) To perform an assessment of the commercial viability of the newly developed engine technology. (4) To specify fuel properties conducive to improvements in emissions, reliability, and fuel efficiency for engines using high-efficiency clean combustion (HECC) technologies. To demonstrate the technology is compatible with B2

  15. Cast Stone Formulation At Higher Sodium Concentrations

    SciTech Connect (OSTI)

    Fox, K. M.; Roberts, K. A.; Edwards, T. B.

    2014-02-28T23:59:59.000Z

    A low temperature waste form known as Cast Stone is being considered to provide supplemental Low Activity Waste (LAW) immobilization capacity for the Hanford site. Formulation of Cast Stone at high sodium concentrations is of interest since a significant reduction in the necessary volume of Cast Stone and subsequent disposal costs could be achieved if an acceptable waste form can be produced with a high sodium molarity salt solution combined with a high water to premix (or dry blend) ratio. The objectives of this study were to evaluate the factors involved with increasing the sodium concentration in Cast Stone, including production and performance properties and the retention and release of specific components of interest. Three factors were identified for the experimental matrix: the concentration of sodium in the simulated salt solution, the water to premix ratio, and the blast furnace slag portion of the premix. The salt solution simulants used in this study were formulated to represent the overall average waste composition. The cement, blast furnace slag, and fly ash were sourced from a supplier in the Hanford area in order to be representative. The test mixes were prepared in the laboratory and fresh properties were measured. Fresh density increased with increasing sodium molarity and with decreasing water to premix ratio, as expected given the individual densities of these components. Rheology measurements showed that all of the test mixes produced very fluid slurries. The fresh density and rheology data are of potential value in designing a future Cast Stone production facility. Standing water and density gradient testing showed that settling is not of particular concern for the high sodium compositions studied. Heat of hydration measurements may provide some insight into the reactions that occur within the test mixes, which may in turn be related to the properties and performance of the waste form. These measurements showed that increased sodium concentration in the salt solution reduced the time to peak heat flow, and reducing the amount of slag in the premix increased the time to peak heat flow. These observations may help to describe some of the cured properties of the samples, in particular the differences in compressive strength observed after 28 and 90 days of curing. Samples were cured for at least 28 days at ambient temperature in the laboratory prior to cured properties analyses. The low activity waste form for disposal at the Hanford Site is required to have a compressive strength of at least 500 psi. After 28 days of curing, several of the test mixes had mean compressive strengths that were below the 500 psi requirement. Higher sodium concentrations and higher water to premix ratios led to reduced compressive strength. Higher fly ash concentrations decreased the compressive strength after 28 days of curing. This may be explained in that the cementitious phases matured more quickly in the mixes with higher concentrations of slag, as evidenced by the data for the time to peak heat generation. All of the test mixes exhibited higher mean compressive strengths after 90 days of curing, with only one composition having a mean compressive strength of less than 500 psi. Leachability indices were determined for the test mixes for contaminants of interest. The leaching performance of the mixes evaluated in this study was not particularly sensitive to the factors used in the experimental design. This may be beneficial in demonstrating that the performance of the waste form is robust with respect to changes in the mix composition. The results of this study demonstrate the potential to achieve significantly higher waste loadings in Cast Stone and other low temperature, cementitious waste forms. Additional work is needed to elucidate the hydration mechanisms occurring in Cast Stone formulated with highly concentrated salt solutions since these reactions are responsible for determining the performance of the cured waste form. The thermal analyses completed in this study provide some preliminary insight, although the l

  16. Cast Stone Formulation At Higher Sodium Concentrations

    SciTech Connect (OSTI)

    Fox, K. M.; Roberts, K. A.; Edwards, T. B.

    2013-09-17T23:59:59.000Z

    A low temperature waste form known as Cast Stone is being considered to provide supplemental Low Activity Waste (LAW) immobilization capacity for the Hanford site. Formulation of Cast Stone at high sodium concentrations is of interest since a significant reduction in the necessary volume of Cast Stone and subsequent disposal costs could be achieved if an acceptable waste form can be produced with a high sodium molarity salt solution combined with a high water to premix (or dry blend) ratio. The objectives of this study were to evaluate the factors involved with increasing the sodium concentration in Cast Stone, including production and performance properties and the retention and release of specific components of interest. Three factors were identified for the experimental matrix: the concentration of sodium in the simulated salt solution, the water to premix ratio, and the blast furnace slag portion of the premix. The salt solution simulants used in this study were formulated to represent the overall average waste composition. The cement, blast furnace slag, and fly ash were sourced from a supplier in the Hanford area in order to be representative. The test mixes were prepared in the laboratory and fresh properties were measured. Fresh density increased with increasing sodium molarity and with decreasing water to premix ratio, as expected given the individual densities of these components. Rheology measurements showed that all of the test mixes produced very fluid slurries. The fresh density and rheology data are of potential value in designing a future Cast Stone production facility. Standing water and density gradient testing showed that settling is not of particular concern for the high sodium compositions studied. Heat of hydration measurements may provide some insight into the reactions that occur within the test mixes, which may in turn be related to the properties and performance of the waste form. These measurements showed that increased sodium concentration in the salt solution reduced the time to peak heat flow, and reducing the amount of slag in the premix increased the time to peak heat flow. These observations may help to describe some of the cured properties of the samples, in particular the differences in compressive strength observed after 28 and 90 days of curing. Samples were cured for at least 28 days at ambient temperature in the laboratory prior to cured properties analyses. The low activity waste form for disposal at the Hanford Site is required to have a compressive strength of at least 500 psi. After 28 days of curing, several of the test mixes had mean compressive strengths that were below the 500 psi requirement. Higher sodium concentrations and higher water to premix ratios led to reduced compressive strength. Higher fly ash concentrations decreased the compressive strength after 28 days of curing. This may be explained in that the cementitious phases matured more quickly in the mixes with higher concentrations of slag, as evidenced by the data for the time to peak heat generation. All of the test mixes exhibited higher mean compressive strengths after 90 days of curing, with only one composition having a mean compressive strength of less than 500 psi. Leach indices were determined for the test mixes for contaminants of interest. The leaching performance of the mixes evaluated in this study was not particularly sensitive to the factors used in the experimental design. This may be beneficial in demonstrating that the performance of the waste form is robust with respect to changes in the mix composition. The results of this study demonstrate the potential to achieve significantly higher waste loadings in Cast Stone and other low temperature, cementitious waste forms. Additional work is needed to elucidate the hydration mechanisms occurring in Cast Stone formulated with highly concentrated salt solutions since these reactions are responsible for determining the performance of the cured waste form. The thermal analyses completed in this study provide some preliminary insight, although the limited

  17. Cast Stone Formulation At Higher Sodium Concentrations

    SciTech Connect (OSTI)

    Fox, K. M.; Edwards, T. A.; Roberts, K. B.

    2013-10-02T23:59:59.000Z

    A low temperature waste form known as Cast Stone is being considered to provide supplemental Low Activity Waste (LAW) immobilization capacity for the Hanford site. Formulation of Cast Stone at high sodium concentrations is of interest since a significant reduction in the necessary volume of Cast Stone and subsequent disposal costs could be achieved if an acceptable waste form can be produced with a high sodium molarity salt solution combined with a high water to premix (or dry blend) ratio. The objectives of this study were to evaluate the factors involved with increasing the sodium concentration in Cast Stone, including production and performance properties and the retention and release of specific components of interest. Three factors were identified for the experimental matrix: the concentration of sodium in the simulated salt solution, the water to premix ratio, and the blast furnace slag portion of the premix. The salt solution simulants used in this study were formulated to represent the overall average waste composition. The cement, blast furnace slag, and fly ash were sourced from a supplier in the Hanford area in order to be representative. The test mixes were prepared in the laboratory and fresh properties were measured. Fresh density increased with increasing sodium molarity and with decreasing water to premix ratio, as expected given the individual densities of these components. Rheology measurements showed that all of the test mixes produced very fluid slurries. The fresh density and rheology data are of potential value in designing a future Cast Stone production facility. Standing water and density gradient testing showed that settling is not of particular concern for the high sodium compositions studied. Heat of hydration measurements may provide some insight into the reactions that occur within the test mixes, which may in turn be related to the properties and performance of the waste form. These measurements showed that increased sodium concentration in the salt solution reduced the time to peak heat flow, and reducing the amount of slag in the premix increased the time to peak heat flow. These observations may help to describe some of the cured properties of the samples, in particular the differences in compressive strength observed after 28 and 90 days of curing. Samples were cured for at least 28 days at ambient temperature in the laboratory prior to cured properties analyses. The low activity waste form for disposal at the Hanford Site is required to have a compressive strength of at least 500 psi. After 28 days of curing, several of the test mixes had mean compressive strengths that were below the 500 psi requirement. Higher sodium concentrations and higher water to premix ratios led to reduced compressive strength. Higher fly ash concentrations decreased the compressive strength after 28 days of curing. This may be explained in that the cementitious phases matured more quickly in the mixes with higher concentrations of slag, as evidenced by the data for the time to peak heat generation. All of the test mixes exhibited higher mean compressive strengths after 90 days of curing, with only one composition having a mean compressive strength of less than 500 psi. Leach indices were determined for the test mixes for contaminants of interest. The leaching performance of the mixes evaluated in this study was not particularly sensitive to the factors used in the experimental design. This may be beneficial in demonstrating that the performance of the waste form is robust with respect to changes in the mix composition. The results of this study demonstrate the potential to achieve significantly higher waste loadings in Cast Stone and other low temperature, cementitious waste forms. Additional work is needed to elucidate the hydration mechanisms occurring in Cast Stone formulated with highly concentrated salt solutions since these reactions are responsible for determining the performance of the cured waste form. The thermal analyses completed in this study provide some preliminary insight, although the limited

  18. PROGRESS IN ENERGY EFFICIENT BUILDINGS

    E-Print Network [OSTI]

    Wall, L.W.

    2009-01-01T23:59:59.000Z

    Seven recent energy-efficient U.S. office buildings areSeven recent energy-efficient U.S. office buildings are18, 1983. PROGRESS IN ENERGY EFFICIENT BUILDINGS Leonard W.

  19. Sandia Energy - Enabling Energy Efficiency

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

    Enabling Energy Efficiency Home Energy Research EFRCs Solid-State Lighting Science EFRC Enabling Energy Efficiency Enabling Energy EfficiencyTara Camacho-Lopez2015-03-26T16:33:50+0...

  20. Energy Efficiency Indicators Methodology Booklet

    E-Print Network [OSTI]

    Sathaye, Jayant

    2010-01-01T23:59:59.000Z

    2000 NRCAN, 2006. Energy Efficiency Trends in Canada 1990 toResources Canada’s Office of Energy Efficiency, Ottawa.NRCAN, 2009. Energy Efficiency Trends in Canada 1990 to

  1. On conformal higher spin wave operators

    E-Print Network [OSTI]

    Teake Nutma; Massimo Taronna

    2014-07-08T23:59:59.000Z

    We analyze free conformal higher spin actions and the corresponding wave operators in arbitrary even dimensions and backgrounds. We show that the wave operators do not factorize in general, and identify the Weyl tensor and its derivatives as the obstruction to factorization. We give a manifestly factorized form for them on (A)dS backgrounds for arbitrary spin and on Einstein backgrounds for spin 2. We are also able to fix the conformal wave operator in d=4 for s=3 up to linear order in the Riemann tensor on generic Bach-flat backgrounds.

  2. Inflationary Universe in Higher Derivative Induced Gravity

    E-Print Network [OSTI]

    W. F. Kao

    2000-06-27T23:59:59.000Z

    In an induced-gravity model, the stability condition of an inflationary slow-rollover solution is shown to be $\\phi_0 \\partial_{\\phi_0}V(\\phi_0)=4V(\\phi_0)$. The presence of higher derivative terms will, however, act against the stability of this expanding solution unless further constraints on the field parameters are imposed. We find that these models will acquire a non-vanishing cosmological constant at the end of inflation. Some models are analyzed for their implication to the early universe.

  3. Department of Energy Idaho - Higher Education Links

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadapInactiveVisitingContract Management FermiDavid Turner David3 |AProgramLinks > Local Higher

  4. Improving the Contribution of Economic Models in Evaluating Industrial Energy Efficiency Improvements 

    E-Print Network [OSTI]

    Laitner, J. A.

    2007-01-01T23:59:59.000Z

    Traditional representation of improved end-use efficiency in the manufacturing sector has tended to assume “a net cost” perspective. In other words, the assumption for many models is that any change within the energy end-use patterns must imply a...

  5. Efficient Learning of Generalized Linear and Single Index Models with Isotonic Regression

    E-Print Network [OSTI]

    Efficient Learning of Generalized Linear and Single Index Models with Isotonic Regression Sham M) provide powerful generalizations of linear regression, where the target variable is assumed to be a (possibly unknown) 1-dimensional function of a linear predictor. In gen- eral, these problems entail non

  6. To facilitate returning graded problems more efficiently, please write on your submitted problem sets

    E-Print Network [OSTI]

    Kammen, Daniel M.

    CO2 (in $/ton CO2) over time. Assume a GHG emission rate of 530g CO2/kWh from the natural gas power CO2 for the society (as represented by these four entities) on an annual basis. A net benefit200/PP284 Topics covered: NPV, Energy efficiency, Electricity grid, Learning curve 1. Comparing

  7. Delay-Constrained Energy-Efficient Scheduling over a Multihop Link

    E-Print Network [OSTI]

    Neely, Michael J.

    on delay-constrained energy- efficient packet transmission over a static multihop link. Optimal offline scheduling (vis-`a-vis total transmission energy), assuming information of all packet arrivals before transmission energy and average packet delay are analyzed and characterized. It is demonstrated that energy

  8. Brief review on higher spin black holes

    E-Print Network [OSTI]

    Alfredo Perez; David Tempo; Ricardo Troncoso

    2014-05-12T23:59:59.000Z

    We review some relevant results in the context of higher spin black holes in three-dimensional spacetimes, focusing on their asymptotic behaviour and thermodynamic properties. For simplicity, we mainly discuss the case of gravity nonminimally coupled to spin-3 fields, being nonperturbatively described by a Chern-Simons theory of two independent sl(3,R) gauge fields. Since the analysis is particularly transparent in the Hamiltonian formalism, we provide a concise discussion of their basic aspects in this context; and as a warming up exercise, we briefly analyze the asymptotic behaviour of pure gravity, as well as the BTZ black hole and its thermodynamics, exclusively in terms of gauge fields. The discussion is then extended to the case of black holes endowed with higher spin fields, briefly signaling the agreements and discrepancies found through different approaches. We conclude explaining how the puzzles become resolved once the fall off of the fields is precisely specified and extended to include chemical potentials, in a way that it is compatible with the asymptotic symmetries. Hence, the global charges become completely identified in an unambiguous way, so that different sets of asymptotic conditions turn out to contain inequivalent classes of black hole solutions being characterized by a different set of global charges.

  9. Residential Energy Efficiency Rebate Programs

    Broader source: Energy.gov [DOE]

    Efficiency Vermont provides financial incentives for its residential customers to install energy efficient equipment in their homes. Eligible Energy Star equipment includes dehumidifiers (seasonal...

  10. Energy Efficiency Investment Fund Rebates

    Broader source: Energy.gov [DOE]

    Specific efficiency requirements for rebates are available at  the Energy Efficiency Investment Fund Website in applications for Lighting and Lighting Control Rebates, Natural Gas and Water Heati...

  11. Sandia National Laboratories: Energy Efficiency

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

    Down the Costs of Efficient LED Lighting On February 14, 2013, in Energy, Energy Efficiency, Materials Science, Partnership, Research & Capabilities, Solid-State Lighting Solid...

  12. Energy Efficiency of Future Networks Energy Efficient Transmission in

    E-Print Network [OSTI]

    Ulukus, Sennur

    Energy Efficiency of Future Networks Part 1: Energy Efficient Transmission in Classical Wireless #12;Goals Energy Efficiency: What it meant last decade; what it means today From a communication network design perspective what should we care about for energy efficient design of cellular

  13. Efficiency Improvement of an IPMSM using Maximum Efficiency Operating Strategy

    E-Print Network [OSTI]

    Paderborn, Universität

    Efficiency Improvement of an IPMSM using Maximum Efficiency Operating Strategy Daniel Pohlenz. These are characterized by high efficiency and high torque as well as power density. The generation of reference currents that the MTPC method deviates considerably from the best efficiency under certain boundary conditions. The use

  14. Commercial Buildings Partnerships - Overview of Higher Education Projects

    SciTech Connect (OSTI)

    Parrish, Kristen; Robinson, Alastair; Regnier, Cindy

    2013-02-01T23:59:59.000Z

    The Commercial Building Partnership (CBP), a public/private, cost-shared program sponsored by the U.S. Department of Energy (DOE), paired selected commercial building owners and operators with representatives of DOE, its national laboratories, and private-sector technical experts. These teams explored energy-saving measures across building systems – including some considered too costly or technologically challenging – and used advanced energy modeling to achieve peak whole-building performance. Modeling results were then included in new construction or retrofit designs to achieve significant energy reductions. CBP design goals aimed to achieve 50 percent energy savings compared to ANSI/ASHRAE/IES Standard 90.1-2004 for new construction, while retrofits are designed to consume at least 30 percent less energy than either Standard 90.1-2004 or current consumption. After construction and commissioning of the project, laboratory staff continued to work with partners to collect and analyze data for verification of the actual energy reduction. CBP projects represent diverse building types in commercial real estate, including lodging, grocery, retail, higher education, office, and warehouse/storage facilities. Partners also commit to replicating low-energy technologies and strategies from their CBP projects throughout their building portfolios. As a result of CBP projects, five sector overviews (Lodging, Food Sales, General Merchandise, Higher Education, Offices) were created to capture successful strategies and recommended energy efficiency measures that could broadly be applied across these sectors. These overviews are supplemented with individual case studies providing specific details on the decision criteria, modeling results, and lessons learned on specific projects. Sector overviews and CBP case studies will also be updated to reflect verified data and replication strategies as they become available.

  15. Ashland puts emphasis on higher technology

    SciTech Connect (OSTI)

    Not Available

    1980-12-03T23:59:59.000Z

    It is reported that Ashland will be switching away from commodity-type petroleum projects, such as gasoline, and toward high-technology items, such as synthetic fuels, lubricants and speciality petrochemicals. New projects involved in the shift toward higher technology include a 5,000 bbl/day lubricating-oil plant at Rabigh, Saudi Arabia, the startup of the big new ethanol plant at South Point, Ohio, and the proposed $260 million acquisition of U.S. Filter. Ashland plans to sell some of the ethanol to be produced in the 3,500 bbl/day corn-based plant in Ohio, but will use the ethanol as an octane-boosting component in premium unleaded gasoline.

  16. Naked Singularities in Higher Dimensional Gravitational Collapse

    E-Print Network [OSTI]

    Asit Banerjee; Ujjal Debnath; Subenoy Chakraborty

    2003-02-28T23:59:59.000Z

    Spherically symmetric inhomogeneous dust collapse has been studied in higher dimensional space-time and the factors responsible for the appearance of a naked singularity are analyzed in the region close to the centre for the marginally bound case. It is clearly demonstrated that in the former case naked singularities do not appear in the space-time having more than five dimension, which appears to a strong result. The non-marginally bound collapse is also examined in five dimensions and the role of shear in developing naked singularities in this space-time is discussed in details. The five dimensional space-time is chosen in the later case because we have exact solution in closed form only in five dimension and not in any other case.

  17. Entanglement entropy in higher derivative holography

    E-Print Network [OSTI]

    Arpan Bhattacharyya; Apratim Kaviraj; Aninda Sinha

    2013-08-16T23:59:59.000Z

    We consider holographic entanglement entropy in higher derivative gravity theories. Recently Lewkowycz and Maldacena arXiv:1304.4926 have provided a method to derive the equations for the entangling surface from first principles. We use this method to compute the entangling surface in four derivative gravity. Certain interesting differences compared to the two derivative case are pointed out. For Gauss-Bonnet gravity, we show that in the regime where this method is applicable, the resulting equations coincide with proposals in the literature as well as with what follows from considerations of the stress tensor on the entangling surface. Finally we demonstrate that the area functional in Gauss-Bonnet holography arises as a counterterm needed to make the Euclidean action free of power law divergences.

  18. Phase Structure of Higher Spin Black Holes

    E-Print Network [OSTI]

    Abhishek Chowdhury; Arunabha Saha

    2015-02-12T23:59:59.000Z

    We revisit the study of the phase structure of higher spin black holes carried out in arXiv$:1210.0284$ using the "canonical formalism". In particular we study the low as well as high temperature regimes. We show that the Hawking-Page transition takes place in the low temperature regime. The thermodynamically favoured phase changes from conical surplus to black holes and then again to conical surplus as we increase temperature. We then show that in the high temperature regime the diagonal embedding gives the appropriate description. We also give a map between the parameters of the theory near the IR and UV fixed points. This makes the "good" solutions near one end map to the "bad" solutions near the other end and vice versa.

  19. Generalized Holographic Superconductors with Higher Derivative Couplings

    E-Print Network [OSTI]

    Anshuman Dey; Subhash Mahapatra; Tapobrata Sarkar

    2014-06-13T23:59:59.000Z

    We introduce and study generalized holographic superconductors with higher derivative couplings between the field strength tensor and a complex scalar field, in four dimensional AdS black hole backgrounds. We study this theory in the probe limit, as well as with backreaction. There are multiple tuning parameters in the theory, and with two non-zero parameters, we show that the theory has a rich phase structure, and in particular, the transition from the normal to the superconducting phase can be tuned to be of first order or of second order within a window of one of these. This is established numerically as well as by computing the free energy of the boundary theory. We further present analytical results for the critical temperature of the model, and compare these with numerical analysis. Optical properties of this system are also studied numerically in the probe limit, and our results show evidence for negative refraction at low frequencies.

  20. Record External Quantum Efficiency in Blue OLED Device

    Broader source: Energy.gov [DOE]

    Scientists at Pacific Northwest National Laboratory (PNNL) have created a blue organic light emitting diode (OLED) with an external quantum efficiency (EQE) of 11% at 800 cd/m2, exceeding their previous record EQE of 8%. The EQE of blue OLEDs is a major challenge in OLED technology development. This achievement is particularly notable since it was accomplished at a much lower operating voltage (6.2V) than previous demonstrations using similar structures, revealing the potential for much higher power efficiencies.

  1. High Energy Efficiency Air Conditioning

    SciTech Connect (OSTI)

    Edward McCullough; Patrick Dhooge; Jonathan Nimitz

    2003-12-31T23:59:59.000Z

    This project determined the performance of a new high efficiency refrigerant, Ikon B, in a residential air conditioner designed to use R-22. The refrigerant R-22, used in residential and small commercial air conditioners, is being phased out of production in developed countries beginning this year because of concerns regarding its ozone depletion potential. Although a replacement refrigerant, R-410A, is available, it operates at much higher pressure than R-22 and requires new equipment. R-22 air conditioners will continue to be in use for many years to come. Air conditioning is a large part of expensive summer peak power use in many parts of the U.S. Previous testing and computer simulations of Ikon B indicated that it would have 20 - 25% higher coefficient of performance (COP, the amount of cooling obtained per energy used) than R-22 in an air-cooled air conditioner. In this project, a typical new R-22 residential air conditioner was obtained, installed in a large environmental chamber, instrumented, and run both with its original charge of R-22 and then with Ikon B. In the environmental chamber, controlled temperature and humidity could be maintained to obtain repeatable and comparable energy use results. Tests with Ikon B included runs with and without a power controller, and an extended run for several months with subsequent analyses to check compatibility of Ikon B with the air conditioner materials and lubricant. Baseline energy use of the air conditioner with its original R-22 charge was measured at 90 deg F and 100 deg F. After changeover to Ikon B and a larger expansion orifice, energy use was measured at 90 deg F and 100 deg F. Ikon B proved to have about 19% higher COP at 90 deg F and about 26% higher COP at 100 deg F versus R-22. Ikon B had about 20% lower cooling capacity at 90 deg F and about 17% lower cooling capacity at 100 deg F versus R-22 in this system. All results over multiple runs were within 1% relative standard deviation (RSD). All of these values agree well with previous results and computer simulations of Ikon B performance versus R-22. The lower cooling capacity of Ikon B is not a concern unless a particular air conditioner is near its maximum cooling capacity in application. Typically, oversized A/C systems are installed by contractors to cover contingencies. In the extended run with Ikon B, which lasted about 4.5 months at 100 deg F ambient temperature and 68% compressor on time, the air conditioner performed well with no significant loss of energy efficiency. Post-run analysis of the refrigerant, compressor lubricant oil, compressor, compressor outlet tubing, and the filter/dryer showed minor effects but nothing that was considered significant. The project was very successful. All objectives were achieved, and the performance of Ikon B indicates that it can easily be retrofitted into R-22 air conditioners to give 15 - 20% energy savings and a 1 - 3 year payback of retrofit costs depending on location and use. Ikon B has the potential to be a successful commercial product.

  2. Techno-Economic Feasibility of Highly Efficient Cost-Effective Thermoelectric-SOFC Hybrid Power Generation Systems

    SciTech Connect (OSTI)

    Jifeng Zhang; Jean Yamanis

    2007-09-30T23:59:59.000Z

    Solid oxide fuel cell (SOFC) systems have the potential to generate exhaust gas streams of high temperature, ranging from 400 to 800 C. These high temperature gas streams can be used for additional power generation with bottoming cycle technologies to achieve higher system power efficiency. One of the potential candidate bottoming cycles is power generation by means of thermoelectric (TE) devices, which have the inherent advantages of low noise, low maintenance and long life. This study was to analyze the feasibility of combining coal gas based SOFC and TE through system performance and cost techno-economic modeling in the context of multi-MW power plants, with 200 kW SOFC-TE module as building blocks. System and component concepts were generated for combining SOFC and TE covering electro-thermo-chemical system integration, power conditioning system (PCS) and component designs. SOFC cost and performance models previously developed at United Technologies Research Center were modified and used in overall system analysis. The TE model was validated and provided by BSST. The optimum system in terms of energy conversion efficiency was found to be a pressurized SOFC-TE, with system efficiency of 65.3% and cost of $390/kW of manufacturing cost. The pressurization ratio was approximately 4 and the assumed ZT of the TE was 2.5. System and component specifications were generated based on the modeling study. The major technology and cost barriers for maturing the system include pressurized SOFC stack using coal gas, the high temperature recycle blowers, and system control design. Finally, a 4-step development roadmap is proposed for future technology development, the first step being a 1 kW proof-of-concept demonstration unit.

  3. Efficiencies of Low-Mass Star and Star Cluster Formation

    E-Print Network [OSTI]

    Christopher D. Matzner; Christopher F. McKee

    2000-07-25T23:59:59.000Z

    Using a quantitative model for bipolar outflows driven by hydromagnetic protostellar winds, we calculate the efficiency of star formation assuming that available gas is either converted into stars or ejected in outflows. We estimate the efficiency of a single star formation event in a protostellar core, finding 25%-70% for cores with various possible degrees of flattening. The core mass function and the stellar initial mass function have similar slopes, because the efficiency is not sensitive to its parameters. We then consider the disruption of gas from a dense molecular clump in which a cluster of young stars is being born. In both cases, we present analytical formulae for the efficiencies that compare favorably against observations and, for clusters, against numerical simulations. We predict efficiencies in the range 30%-50% for the regions that form clusters of low-mass stars. In our model, star formation and gas dispersal happen concurrently. We neglect the destructive effects of massive stars: our results are therefore upper limits to the efficiency in regions more massive than about 3000 Msun.

  4. Energy Efficiency & Renewable Energy

    E-Print Network [OSTI]

    , domestic resources. Stationary Power (including CHP & backup power) Auxiliary & Portable Power) Benefits · Efficiencies can be 60% (electrical) and 85% (with CHP) · > 90% reduction in criteria pollutants Commercial CHP $4.9M $3.4M Portable Power Backup Power $20.4M Residential and Small Commercial CHP $4.9M $3

  5. Energy Efficiency Revitalization

    E-Print Network [OSTI]

    Kelly, R. L.

    To set the tone for my remarks I will start by saying- today, energy efficiency is a tough sell. In General Motors, our plant engineering people, faced with headcount deductions, budget cuts, and capital spending constraints are up to their “you...

  6. Energy Efficiency & Renewable Energy

    E-Print Network [OSTI]

    In the United States: > 200 fuel cell vehicles > 20 fuel cell buses ~ 60 fueling stations Production & Delivery biomass & solar). · Potential U.S. employment from fuel cell and hydrogen industries of up to 925,000 jobsEnergy Efficiency & Renewable Energy DOE Hydrogen & Fuel Cell Overview Dr. Sunita Satyapal Program

  7. Energy Efficiency & Renewable Energy

    E-Print Network [OSTI]

    Transportation Benefits · Efficiencies can be 60% (electrical) and 85% (with CHP) · > 90% reduction in criteria's portfolio of transportation technologies will reduce emissions of greenhouse gases and oil consumption. DOE levels--by 2050. Key Findings Include: Estimated Government Cost to Support a Transition to FCVs Systems

  8. Energy Efficiency & Renewable Energy

    E-Print Network [OSTI]

    National Harbor #12;U.S. Energy Consumption U.S. Primary Energy Consumption by Source and Sector 2 #12 · Efficiencies can be 60% (electrical) and 85% (with CHP) · > 90% reduction in criteria pollutants U.S. Department of Energy #12;7 Market Transformation Government acquisitions could significantly reduce the cost

  9. ENERGY EFFICIENT LAUNDRY PROCESS

    SciTech Connect (OSTI)

    Tim Richter

    2005-04-01T23:59:59.000Z

    With the rising cost of energy and increased concerns for pollution and greenhouse gas emissions from power generation, increased focus is being put on energy efficiency. This study looks at several approaches to reducing energy consumption in clothes care appliances by considering the appliances and laundry chemistry as a system, rather than individually.

  10. SEPTEMBER 2009 ENERGY EFFICIENCY &

    E-Print Network [OSTI]

    Kammen, Daniel M.

    Desert, California 16 Boulder County, Colorado 17 Babylon, New York 18 Case Study Comparison Chart 19 5SEPTEMBER 2009 GUIDE TO ENERGY EFFICIENCY & RENEWABLE ENERGY FINANCING DISTRICTS FOR LOCAL GOVERNMENTS PREPARED BY RENEWABLE AND APPROPRIATE ENERGY LABORATORY (RAEL) UNIVERSITY OF CALIFORNIA, BERKELEY

  11. Energy Efficiency & Renewable Energy

    E-Print Network [OSTI]

    Federal buildings which begin the planning process by 2020 to achieve zero-net energy by 2030 PotentialEnergy Efficiency & Renewable Energy Overview of Hydrogen and Fuel Cell Activities Dr. Sunita of Energy Military Energy and Alternative Fuels Conference March 17-18, 2010 San Diego, CA #12;2 1. Overview

  12. Water Efficiency Improvements at Various Environmental Protection...

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

    Water Efficiency Improvements at Various Environmental Protection Agency Sites Water Efficiency Improvements at Various Environmental Protection Agency Sites Water Efficiency...

  13. Cleanroom Energy Efficiency: Metrics and Benchmarks

    E-Print Network [OSTI]

    Mathew, Paul A.

    2012-01-01T23:59:59.000Z

    peak load, boiler efficiency (%), pumping efficiency (hp/to evaluate the efficiency of chiller and boiler systems

  14. Optimal and Efficient Parametric Auctions

    E-Print Network [OSTI]

    Azar, Pablo

    2013-01-01T23:59:59.000Z

    Consider a seller who seeks to provide service to a collection of interested parties, subject to feasibility constraints on which parties may be simultaneously served. Assuming that a distribution is known on the value of ...

  15. ENERGY EFFICIENCY STANDARDS FOR RESIDENTIALAND

    E-Print Network [OSTI]

    , Manager EFFICIENCYSTANDARDS OFFICE E. Ross Deter. De~utvDirector ENERGY EFFICIENCY DIVISION Kent Smith

  16. Energy Efficient Nanoelectronic System Design

    E-Print Network [OSTI]

    Mohanty, Saraju P.

    ://www.newairplane.com One 787 Battery: 12 Cells / 32 V DC 05/21/2013 6 #12;Why Energy Efficient Design ? Environmental energy-efficient designs. How to perform high-yield, energy efficient designs. How to perform effortless, high-yield, energy efficient designs. Gate Gate Gate Source D rain Graphene Layer 05/21/2013 14

  17. actual higher education: Topics by E-print Network

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

    counterfactual Danforth, Bryan Nicholas 126 Application for Higher Education Internship City: Zip Code Mathematics Websites Summary: Application for Higher Education Internship...

  18. african higher education: Topics by E-print Network

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

    counterfactual Danforth, Bryan Nicholas 134 Application for Higher Education Internship City: Zip Code Mathematics Websites Summary: Application for Higher Education Internship...

  19. ashe higher education: Topics by E-print Network

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

    counterfactual Danforth, Bryan Nicholas 126 Application for Higher Education Internship City: Zip Code Mathematics Websites Summary: Application for Higher Education Internship...

  20. attending higher education: Topics by E-print Network

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

    Organizations in Higher Education Education TechQual+ Project 4 Project Coordinators for Texas A&M University 5 Higher Education Tech 138 A knowledge management approach for...

  1. Recovery Act: Wind Energy Consortia between Institutions of Higher...

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

    Recovery Act: Wind Energy Consortia between Institutions of Higher Learning and Industry Recovery Act: Wind Energy Consortia between Institutions of Higher Learning and Industry A...

  2. A comparison of two energy efficient motors

    SciTech Connect (OSTI)

    Kueck, J.D.; Casada, D.A.; Otaduy, P.J. [Oak Ridge National Lab., TN (United States)

    1998-06-01T23:59:59.000Z

    Limited testing provides evidence that a particular energy efficient motor (EEM) appears to have a unique susceptibility to reduced negative sequence impedance. The effect of the reduction in negative sequence impedance is to allow a higher negative sequence current flow under conditions of voltage unbalance or negative sequence harmonic distortion in the bus voltage. This higher current flow results in additional heating of the rotor and 120 Hz vibration, and may combine with other conditions to cause premature failure. In addition, energy efficient motors operate at slightly higher speeds, and may sometimes cause the driven loads to require more horsepower from the motor causing further overheating. Existing industry guidance for the application of three phase motors in poor power quality environments may be inadequate because this guidance does not consider the combined effect of such conditions as voltage unbalance, harmonic distortion and over voltage. A specific application of an EEM is studied in this paper; the motor may be failing due to a combination of over voltage, voltage unbalance, harmonic distortion and loading the motor to full rated load, while the motor has a Service Factor of 1.0.

  3. Water Efficiency Case Studies | Department of Energy

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

    Efficiency Water Efficiency Case Studies Water Efficiency Case Studies These case studies feature examples of water-efficiency projects implemented by Federal agencies. They are...

  4. Energy Efficient Mortgages | Department of Energy

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

    Financing Financing Structures Energy Efficient Mortgages Energy Efficient Mortgages Energy efficient mortgages (EEMs) encourage energy efficiency by giving buyers a better...

  5. Adaptive approximation of higher order posterior statistics

    SciTech Connect (OSTI)

    Lee, Wonjung, E-mail: leew@maths.ox.ac.uk

    2014-02-01T23:59:59.000Z

    Filtering is an approach for incorporating observed data into time-evolving systems. Instead of a family of Dirac delta masses that is widely used in Monte Carlo methods, we here use the Wiener chaos expansion for the parametrization of the conditioned probability distribution to solve the nonlinear filtering problem. The Wiener chaos expansion is not the best method for uncertainty propagation without observations. Nevertheless, the projection of the system variables in a fixed polynomial basis spanning the probability space might be a competitive representation in the presence of relatively frequent observations because the Wiener chaos approach not only leads to an accurate and efficient prediction for short time uncertainty quantification, but it also allows to apply several data assimilation methods that can be used to yield a better approximate filtering solution. The aim of the present paper is to investigate this hypothesis. We answer in the affirmative for the (stochastic) Lorenz-63 system based on numerical simulations in which the uncertainty quantification method and the data assimilation method are adaptively selected by whether the dynamics is driven by Brownian motion and the near-Gaussianity of the measure to be updated, respectively.

  6. Field Demonstration of a High-Efficiency Packaged Rooftop Air Conditioning Unit at Fort Gordon, Augusta, GA

    SciTech Connect (OSTI)

    Armstrong, Peter R.; Sullivan, Gregory P.; Parker, Graham B.

    2006-03-31T23:59:59.000Z

    As part of a larger program targeting the market transformation of packaged rooftop air conditioning, five high-efficiency rooftop air conditioning products were selected in 2002 by the U.S. Department of Energy (DOE) under the Unitary Air Conditioner (UAC) Technology Procurement (http://www.pnl.gov/uac). In February 2003, Fort Gordon in Augusta, Georgia was chosen as the demonstration site. With the goal of validating the field performance and operation of one of the awarded products, a 10-ton high-efficiency packaged rooftop unit (RTU) manufactured by Global Energy Group (GEG) was installed at Fort Gordon in October 2003. Following equipment installation, power metering, air- and refrigerant-side instrumentation was installed on the GEG RTU and a 4-year old typical-efficiency 20-ton RTU manufactured by AAON . The GEG and AAON units were instrumented identically and operated May through July, 2005, to observe performance under a range of conditions. Based on the data collected as part of this demonstration, the GEG equipment performed at least 8% better in stage-1 (single compressor running) cooling and at least 16% better in stage-2 (both compressors running) than the baseline AAON equipment. Performance comparisons are based on what we call application EER normalized to equivalent specific fan power. The full-load, specific-fan-power-normalized application EERs at ARI design conditions were 10.48 Btu/Wh for the GEG and 9.00 Btu/Wh for the baseline machine. With a cost premium of nearly 50%, and slightly higher maintenance costs, the life-cycle cost analysis shows that the GEG technology pays for itself--a positive net-present value (NPV)--only in climates and buildings with long cooling seasons. Manufacture of this equipment on a larger scale can be expected to reduce costs to the point where it is more broadly cost-effective. The assumed 10-ton baseline and new-technology unit costs are $3824.00 and $5525.00 respectively. If the new technology cost is assumed to drop as sales increase to $4674.50 for a 10-ton unit (i.e. the original cost difference is halved), the life-cycle costs improve. A grid of first cost, annual maintenance cost and electricity price is enumerated and the results presented in the report show the sensitivity of life cycle cost to these three financial parameters in each of eight different climates.

  7. Higher-order adaptive finite-element methods for Kohn–Sham density functional theory

    SciTech Connect (OSTI)

    Motamarri, P. [Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109 (United States)] [Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109 (United States); Nowak, M.R. [Department of Electrical Engineering, University of Michigan, Ann Arbor, MI 48109 (United States)] [Department of Electrical Engineering, University of Michigan, Ann Arbor, MI 48109 (United States); Leiter, K.; Knap, J. [U.S. Army Research Labs, Aberdeen Proving Ground, Aberdeen, MD 21001 (United States)] [U.S. Army Research Labs, Aberdeen Proving Ground, Aberdeen, MD 21001 (United States); Gavini, V., E-mail: vikramg@umich.edu [Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109 (United States)

    2013-11-15T23:59:59.000Z

    We present an efficient computational approach to perform real-space electronic structure calculations using an adaptive higher-order finite-element discretization of Kohn–Sham density-functional theory (DFT). To this end, we develop an a priori mesh-adaption technique to construct a close to optimal finite-element discretization of the problem. We further propose an efficient solution strategy for solving the discrete eigenvalue problem by using spectral finite-elements in conjunction with Gauss–Lobatto quadrature, and a Chebyshev acceleration technique for computing the occupied eigenspace. The proposed approach has been observed to provide a staggering 100–200-fold computational advantage over the solution of a generalized eigenvalue problem. Using the proposed solution procedure, we investigate the computational efficiency afforded by higher-order finite-element discretizations of the Kohn–Sham DFT problem. Our studies suggest that staggering computational savings—of the order of 1000-fold—relative to linear finite-elements can be realized, for both all-electron and local pseudopotential calculations, by using higher-order finite-element discretizations. On all the benchmark systems studied, we observe diminishing returns in computational savings beyond the sixth-order for accuracies commensurate with chemical accuracy, suggesting that the hexic spectral-element may be an optimal choice for the finite-element discretization of the Kohn–Sham DFT problem. A comparative study of the computational efficiency of the proposed higher-order finite-element discretizations suggests that the performance of finite-element basis is competing with the plane-wave discretization for non-periodic local pseudopotential calculations, and compares to the Gaussian basis for all-electron calculations to within an order of magnitude. Further, we demonstrate the capability of the proposed approach to compute the electronic structure of a metallic system containing 1688 atoms using modest computational resources, and good scalability of the present implementation up to 192 processors.

  8. A general higher-order remap algorithm for ALE calculations

    SciTech Connect (OSTI)

    Chiravalle, Vincent P [Los Alamos National Laboratory

    2011-01-05T23:59:59.000Z

    A numerical technique for solving the equations of fluid dynamics with arbitrary mesh motion is presented. The three phases of the Arbitrary Lagrangian Eulerian (ALE) methodology are outlined: the Lagrangian phase, grid relaxation phase and remap phase. The Lagrangian phase follows a well known approach from the HEMP code; in addition the strain rate andflow divergence are calculated in a consistent manner according to Margolin. A donor cell method from the SALE code forms the basis of the remap step, but unlike SALE a higher order correction based on monotone gradients is also added to the remap. Four test problems were explored to evaluate the fidelity of these numerical techniques, as implemented in a simple test code, written in the C programming language, called Cercion. Novel cell-centered data structures are used in Cercion to reduce the complexity of the programming and maximize the efficiency of memory usage. The locations of the shock and contact discontinuity in the Riemann shock tube problem are well captured. Cercion demonstrates a high degree of symmetry when calculating the Sedov blast wave solution, with a peak density at the shock front that is similar to the value determined by the RAGE code. For a flyer plate test problem both Cercion and FLAG give virtually the same velocity temporal profile at the target-vacuum interface. When calculating a cylindrical implosion of a steel shell, Cercion and FLAG agree well and the Cercion results are insensitive to the use of ALE.

  9. NEW HIGHER PERFORMANCE LOW COST SELECTIVE SOLAR RADIATION CONTROL COATINGS

    SciTech Connect (OSTI)

    Timothy Ellison; Buddie Dotter; David Tsu

    2003-10-28T23:59:59.000Z

    Energy Conversion Devices, Inc., ECD, has developed a new high-speed low-cost process for depositing high quality dielectric optical coatings--Microwave Plasma Enhanced Chemical Vapor Deposition (MPECVD). This process can deposit SiO{sub x} about 10 times faster than the state-of-the-art conventional technology, magnetron sputtering, at about 1/10th the cost. This process is also being optimized for depositing higher refractive index materials such as Si{sub 3}N{sub 4} and TiO{sub 2}. In this program ECD, in collaboration with Southwall Technologies, Inc. (STI), demonstrated that this process can be used to fabricate high performance low cost Selective Solar Radiation Control (SSRC) films for use in the automotive industry. These coatings were produced on thin (2 mil thick) PET substrates in ECD's pilot roll-to-roll pilot MPECVD deposition machine. Such film can be laminated with PVB in a vehicle's windows. This process can also be used to deposit the films directly onto the glass. Such highly selective films, with a visible transmission (T{sub vis}) of > 70% and a shading coefficient of < 60% can significantly reduce the heat entering a car from solar radiation. Consequently, passenger comfort is increased and the energy needed to operate air conditioning (a/c) systems is reduced; consequently smaller a/c systems can be employed resulting in improved vehicle fuel efficiency.

  10. Nanowire array photovoltaics: Radial disorder versus design for optimal efficiency

    E-Print Network [OSTI]

    Sturmberg, Björn C P; Botten, Lindsay C; Asatryan, Ara A; Poulton, Christopher G; McPhedran, Ross C; de Sterke, C Martijn

    2014-01-01T23:59:59.000Z

    Solar cell designs based on disordered nanostructures tend to have higher efficiencies than structures with uniform absorbers, though the reason is poorly understood. To resolve this, we use a semi-analytic approach to determine the physical mechanism leading to enhanced efficiency in arrays containing nanowires with a variety of radii. We use our findings to systematically design arrays that outperform randomly composed structures. An ultimate efficiency of 23.75% is achieved with an array containing 30% silicon, an increase of almost 10% over a homogeneous film of equal thickness.

  11. Efficient Quantum Ratchet

    E-Print Network [OSTI]

    Chuan-Feng Li; Rong-Chun Ge; Guang-Can Guo

    2012-06-16T23:59:59.000Z

    Quantum resonance is one of the main characteristics of the quantum kicked rotor, which has been used to induce accelerated ratchet current of the particles with a generalized asymmetry potential. Here we show that by desynchronizing the kicked potentials of the flashing ratchet [Phys. Rev. Lett. 94, 110603 (2005)], new quantum resonances are stimulated to conduct directed currents more efficiently. Most distinctly, the missed resonances $\\kappa=1.0\\pi$ and $\\kappa=3.0\\pi$ are created out to induce even larger currents. At the same time, with the help of semiclassical analysis, we prove that our result is exact rather than phenomenon induced by errors of the numerical simulation. Our discovery may be used to realize directed transport efficiently, and may also lead to a deeper understanding of symmetry breaking for the dynamical evolution.

  12. Highly Efficient Silicon Light Emitting Diode

    E-Print Network [OSTI]

    Leminh Holleman Wallinga; P. Leminh; J. Holleman; H. Wallinga

    2000-01-01T23:59:59.000Z

    In this paper, we describe the fabrication, using standard silicon processing techniques, of silicon light-emitting diodes (LED) that efficiently emit photons with energy around the silicon bandgap. The improved efficiency had been explained by the spatial confinement of charge carriers due to a local strain field that is formed by dislocation loop arrays. The dependence of device electroluminescent properties on the annealing conditions is carefully examined as a high temperature process has profound influence on these dislocations. Increased luminescent intensity at higher device temperature, together with pure diffusion current conduction mechanism evidently shows the influence of the dislocation loops. The electrical properties of the diode are reasonable with low leakage reverse current.

  13. Managing Energy Efficiency Improvement 

    E-Print Network [OSTI]

    Almaguer, J.

    2006-01-01T23:59:59.000Z

    results has been the utilization of Six Sigma methodology to identify and seize opportunities to improve our performance and to better meet customer needs. Since its implementation in 1999, Six Sigma has proven to be a breakthrough process that can... take Dow to the next level of performance for all our key stakeholders. The Six Sigma methodology has been especially successful in improving energy efficiency and reducing energy costs and is the primary methodology used by technology center...

  14. High efficiency incandescent lighting

    DOE Patents [OSTI]

    Bermel, Peter; Ilic, Ognjen; Chan, Walker R.; Musabeyoglu, Ahmet; Cukierman, Aviv Ruben; Harradon, Michael Robert; Celanovic, Ivan; Soljacic, Marin

    2014-09-02T23:59:59.000Z

    Incandescent lighting structure. The structure includes a thermal emitter that can, but does not have to, include a first photonic crystal on its surface to tailor thermal emission coupled to, in a high-view-factor geometry, a second photonic filter selected to reflect infrared radiation back to the emitter while passing visible light. This structure is highly efficient as compared to standard incandescent light bulbs.

  15. Calculating Fired Heater Efficiency

    E-Print Network [OSTI]

    Harriz, J. T.; Ritter, E. L.

    bills. A review of the Heat Loss and Input/Output methods of efficiency analyses is presented, along with a discussion of their relative accuracy. Examples cited include refinery mixed fuel gas, coal, and chemical recovery fueled applications, using.... 75 percent excess 02 (dry basis) -- a respectable operation. Eva luate boi ler effieiency when burning mixed refinery gas (at an oil refinery), coa1 (at a central power station) and black liquor (at a paper mill). The practical definition of LHV...

  16. Integrated Energy Efficiency

    E-Print Network [OSTI]

    Heins, S.

    Integrated Energy Efficiency Steve Heins VP Communications and Government Affairs Orion Energy Systems, Inc. 2 MegaTrend Convergence We need companies to commercialize technologies that use less energy without compromise to operations. Energy... Environment US electricity consumption growing 43% by 2030 Power generation expected to account for 50% of CO 2 emission increases 3 How Electricity Is Used 24 Hour Operation Midnight 6 a.m. Noon 6 p.m. Midnight kW 4 Lighting is a Major Component...

  17. Algebra+Homotopy=Higher structures Operadic homotopical algebra

    E-Print Network [OSTI]

    Vallette, Bruno

    Algebra+Homotopy=Higher structures Operadic homotopical algebra Rewriting method Higher Algebra via-Louis Curien (Venezia, September 10, 2013) Bruno Vallette (Universit´e Nice Sophia-Antipolis) Higher Algebra via Rewriting of Trees #12;Algebra+Homotopy=Higher structures Operadic homotopical algebra Rewriting

  18. Energy efficient alternatives to halogen torchieres

    SciTech Connect (OSTI)

    Siminovitch, M.; Marr, L.; Mitchell, J.; Page, E.

    1997-03-01T23:59:59.000Z

    A series of novel energy efficient torchiere systems have been developed using compact fluorescent lamps (CFLs). These systems were studied photometrically and compared with the performance of traditional commercially available tungsten halogen sources. Gonio-photometric data and power assessments indicate that significant lighting energy savings can be obtained by utilizing CFL sources instead of standard tungsten halogen sources. This energy savings is jointly due to the higher source efficacy of the CFLs and the surprisingly poor performance of the imported 300 Watt halogen lamps. Experimental data shows that a 50 to 60 Watt CFL will effectively lumen match a variety of 300 Watt tungsten halogen sources with 5 to 10 times the efficacy. CFL torchieres have additional benefits of higher power quality and cooler lamp operating temperature, making them safer fixtures.

  19. Computationally Efficient Modeling of High-Efficiency Clean Combustion...

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

    Meeting, June 7-11, 2010 -- Washington D.C. ace012aceves2010o.pdf More Documents & Publications Computationally Efficient Modeling of High-Efficiency Clean Combustion Engines...

  20. High Efficiency Fans and High Efficiency Electrical Motors

    E-Print Network [OSTI]

    Breedlove, C. W.

    Replacing nominal efficient electrical motors with premium efficiency can save on electrical power costs in cotton gins. Connected horsepower load on industrial air fans is approximately 60% of the total horsepower in a typical cotton gin...

  1. Intelligent Efficiency: the Next Generation of Energy Efficiency 

    E-Print Network [OSTI]

    Trombley,D.; Molina, M.; Elliot, R. N.

    2012-01-01T23:59:59.000Z

    of buildings, an entire city, or the electric power grid, allow a scaling up of intelligent efficiency, amplifying the benefits by coordinating all systems. Through intelligent efficiency, smart grids, cities, transportation systems, and communications..., there is another aspect of intelligent efficiency that is the key to realizing its potential: intelligent infrastructure. Intelligent efficiency enables more integrated, smarter, and more reliable infrastructure, such as smart power grids, cities...

  2. Intelligent Efficiency: the Next Generation of Energy Efficiency

    E-Print Network [OSTI]

    Trombley,D.; Molina, M.; Elliot, R. N.

    2012-01-01T23:59:59.000Z

    of buildings, an entire city, or the electric power grid, allow a scaling up of intelligent efficiency, amplifying the benefits by coordinating all systems. Through intelligent efficiency, smart grids, cities, transportation systems, and communications..., there is another aspect of intelligent efficiency that is the key to realizing its potential: intelligent infrastructure. Intelligent efficiency enables more integrated, smarter, and more reliable infrastructure, such as smart power grids, cities...

  3. Energy Efficiency and Pollution Prevention: Industrial Efficiency Strategies 

    E-Print Network [OSTI]

    Pye, M.; Elliott, R. N.

    1998-01-01T23:59:59.000Z

    successfully combined energy efficiency and pollution prevention technologies and strategies to enhance the environment, productivity and the bottom line....

  4. Making Efficiency a More Efficient Business | Department of Energy

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

    workforce development and incentive initiatives for energy efficiency professionals. The Business Models Guide helps professionals expand their services, establish business...

  5. LEDs_3LEDs_3 current efficiency

    E-Print Network [OSTI]

    Pulfrey, David L.

    efficiencySec. 8.2 From our toolbox Current efficiency #12;4 Light extraction efficiencyLight extraction extraction efficiencyDesign to improve extraction efficiencySec. 8.4 What are the features of this LED from;6 Various efficienciesVarious efficienciesSecs. 8.4, 8.5 Present record is 56%Wall-plug efficiency Wall

  6. Gas Turbines Increase the Energy Efficiency of Industrial Processes

    E-Print Network [OSTI]

    Banchik, I. N.; Bohannan, W. R.; Stork, K.; McGovern, L. J.

    1981-01-01T23:59:59.000Z

    It is a well known fact that the gas turbine in a combined cycle has a higher inherent Carnot efficiency than the steam cycle which has been more generally accepted by industry. Unlike steam turbines, gas turbines do not require large boiler feed...

  7. Leveraging Multiple Heterogeneous Radios for Energy-efficient Routing

    E-Print Network [OSTI]

    Kravets, Robin

    /low- rate radio) and presented a dual-radio communication protocol that manages the transitions of the high-power/n. To calculate the anticipated delay, each node mon- Power Source Dual Power Dual Radio MonitorPower Meter Figure efficiency than these lower-power radios due to their higher bit rates, the larger idle costs make them less

  8. Viscosity dependence of geminate recombination efficiency after bimolecular charge separation

    E-Print Network [OSTI]

    Burshtein, Anatoly

    Viscosity dependence of geminate recombination efficiency after bimolecular charge separation A. A viscosity dependence. As a result the latter becomes nonmonotonous, provided the kinetic controlled ionization gives way to a diffusional one, creating the more remote ions the higher the solvent viscosity

  9. Higher Order Squeezing and Higher Order Subpoissonian Photon Statistics in Intermediate States

    E-Print Network [OSTI]

    Amit Verma; Anirban Pathak

    2010-04-10T23:59:59.000Z

    Recently simpler criteria for the Hong-Mandel higher order squeezing (HOS) and higher order subpossonian photon statistics (HOSPS) are provided by us [Phys. Lett. A 374 (2010) 1009]. Here we have used these simplified criteria to study the possibilities of observing HOSPS and HOS in different intermediate states, such as generalized binomial state, hypergeometric state, negative binomial state and photon added coherent state. It is shown that these states may satisfy the condition of HOS and HOSPS. It is also shown that the depth and region of nonclassicality can be controlled by controlling various parameters related to intermediate states. Further, we have analyzed the mutual relationship between different signatures of higher order nonclassicality with reference to these intermediate states. We have observed that the generalized binomial state may show signature of HOSPS in absence of HOS. Earlier we have shown that NLVSS shows HOS in absence of HOSPS. Consequently it is established that the HOSPS and HOS of same order are independent phenomenon.

  10. Engineering Fundamentals of Energy Efficiency

    E-Print Network [OSTI]

    Cullen, Jonathan M

    2010-03-16T23:59:59.000Z

    Using energy more efficiently is essential if carbon emissions are to be reduced. According to the International Energy Agency (IEA), energy efficiency improvements represent the largest and least costly savings in carbon emissions, even when...

  11. Modelling energy efficiency for computation

    E-Print Network [OSTI]

    Reams, Charles

    2012-11-13T23:59:59.000Z

    In the last decade, efficient use of energy has become a topic of global significance, touching almost every area of modern life, including computing. From mobile to desktop to server, energy efficiency concerns are now ubiquitous. However...

  12. Energy efficiency in office technology

    E-Print Network [OSTI]

    Dandridge, Cyane Bemiss

    1994-01-01T23:59:59.000Z

    This thesis, directed toward a wide variety of persons interested in energy efficiency issues with office technology, explores several issues relating to reducing energy use and improving energy efficiency of office ...

  13. Energy efficient data centers

    SciTech Connect (OSTI)

    Tschudi, William; Xu, Tengfang; Sartor, Dale; Koomey, Jon; Nordman, Bruce; Sezgen, Osman

    2004-03-30T23:59:59.000Z

    Data Center facilities, prevalent in many industries and institutions are essential to California's economy. Energy intensive data centers are crucial to California's industries, and many other institutions (such as universities) in the state, and they play an important role in the constantly evolving communications industry. To better understand the impact of the energy requirements and energy efficiency improvement potential in these facilities, the California Energy Commission's PIER Industrial Program initiated this project with two primary focus areas: First, to characterize current data center electricity use; and secondly, to develop a research ''roadmap'' defining and prioritizing possible future public interest research and deployment efforts that would improve energy efficiency. Although there are many opinions concerning the energy intensity of data centers and the aggregate effect on California's electrical power systems, there is very little publicly available information. Through this project, actual energy consumption at its end use was measured in a number of data centers. This benchmark data was documented in case study reports, along with site-specific energy efficiency recommendations. Additionally, other data center energy benchmarks were obtained through synergistic projects, prior PG&E studies, and industry contacts. In total, energy benchmarks for sixteen data centers were obtained. For this project, a broad definition of ''data center'' was adopted which included internet hosting, corporate, institutional, governmental, educational and other miscellaneous data centers. Typically these facilities require specialized infrastructure to provide high quality power and cooling for IT equipment. All of these data center types were considered in the development of an estimate of the total power consumption in California. Finally, a research ''roadmap'' was developed through extensive participation with data center professionals, examination of case study findings, and participation in data center industry meetings and workshops. Industry partners enthusiastically provided valuable insight into current practice, and helped to identify areas where additional public interest research could lead to significant efficiency improvement. This helped to define and prioritize the research agenda. The interaction involved industry representatives with expertise in all aspects of data center facilities, including specialized facility infrastructure systems and computing equipment. In addition to the input obtained through industry workshops, LBNL's participation in a three-day, comprehensive design ''charrette'' hosted by the Rocky Mountain Institute (RMI) yielded a number of innovative ideas for future research.

  14. ADEPT: Efficient Power Conversion

    SciTech Connect (OSTI)

    None

    2011-01-01T23:59:59.000Z

    ADEPT Project: In today’s increasingly electrified world, power conversion—the process of converting electricity between different currents, voltage levels, and frequencies—forms a vital link between the electronic devices we use every day and the sources of power required to run them. The 14 projects that make up ARPA-E’s ADEPT Project, short for “Agile Delivery of Electrical Power Technology,” are paving the way for more energy efficient power conversion and advancing the basic building blocks of power conversion: circuits, transistors, inductors, transformers, and capacitors.

  15. Efficiency of stripping mechanisms

    E-Print Network [OSTI]

    F. Combes

    2003-08-18T23:59:59.000Z

    There are several physical processes to remove gas from galaxies in clusters, with subsequent starvation and star formation quenching: tidal interactions between galaxies, or tidal stripping from the cluster potential itself, interactions with the hot intra-cluster medium (ICM) through ram pressure, turbulent or viscous stripping, or also outflows from star formation of nuclear activity, We review the observational evidence for all processes, and numerical simulations of galaxies in clusters which support the respective mechanisms. This allows to compare their relative efficiencies, all along cluster formation.

  16. Oncor Energy Efficiency Programs

    E-Print Network [OSTI]

    Betts, C.

    2014-01-01T23:59:59.000Z

    calculations take credit for 7% line losses * Based on current forecast. Subject to change prior to EEPR filing 3 ESL-KT-14-11-04 CATEE 2014: Clean Air Through Efficiency Conference, Dallas, Texas Nov. 18-20 050,000 100,000 150,000 Portfolio 2012 2013 2014... 2015 2012 - 2015 Savings Comparison k W • 2015 – CLM reduced to 55 MW from 60 MW in 2014 • Impact of commercial lighting and air conditioning Federal Standard changes are reflected in the 2015 Commercial portfolio For Oncor Internal Use Only 4 0 50...

  17. Iron efficiency in sorghum

    E-Print Network [OSTI]

    Esty, James Craig

    1979-01-01T23:59:59.000Z

    ) James Craig Esty, B, S. , Panhandle State College Co-Chairmen of Advisory Committee: Dr. Arthur B. Onken Dr. Lloyd R. Hossner R tt *ht ' d f * ' g * gh L~Sh bicolor (L. ) Moenchj parental lines and Fl hybrids indicate varying degrees of iron (Fe...) utilization. Visual ratings after seven days of Fe stress indicated only one hybrid, ATx 378 x RTx 2536, to be green or Fe efficient. Hybrids or parental lines rated partially chlorotic were: ATx 378 x RTx 415 and RTx 2536. Those sorghums rated chlorotic...

  18. Efficient Repeated Implementation

    E-Print Network [OSTI]

    Lee, J; Sabourian, Hamid

    , outcome a˜i ? A used in the construction of Si above satisfies (4). Then, for any ? ? ??(R?), t, ?(t) and ?t, we have: (i) g?(t)(?,R?) = g?; (ii) m?(t),? t i (?,R ?) = (·, 0) for all i; (iii) a?(t),? t (?,R?) ? f(?). Proof. First we establish two claims... , for each i, outcome a˜i ? A used in the construction of Si above satisfies (4). Then, for any ? ? ??(R?), pi?(t)i (?,R ?) = vi(f) for any i, t > 1 and ?(t). Proof. Suppose not; then f is efficient in the range but there exist some ? ? ??(R?), t > 1 and ?...

  19. High efficiency photoionization detector

    DOE Patents [OSTI]

    Anderson, David F. (3055 Trinity, Los Alamos, NM 87544)

    1984-01-01T23:59:59.000Z

    A high efficiency photoionization detector using tetraaminoethylenes in a gaseous state having a low ionization potential and a relative photoionization cross section which closely matches the emission spectrum of xenon gas. Imaging proportional counters are also disclosed using the novel photoionization detector of the invention. The compound of greatest interest is TMAE which comprises tetrakis(dimethylamino)ethylene which has a measured ionization potential of 5.36.+-.0.02 eV, and a vapor pressure of 0.35 torr at 20.degree. C.

  20. High Efficiency Recoil

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville PowerCherries 82981-1cn SunnybankD.jpgHanfordDepartmentInnovation Portal 130221326|Efficiency

  1. BPA Energy Efficiency Plan

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadapInactiveVisiting the TWP TWPAlumniComplex historian ...BES UserDOE -BPA Energy Efficiency

  2. Energy Efficiency Calendar

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadapInactiveVisitingContractElectron-StateEnergyHeavy Duty VehicleNuclearEnergy-Efficiency Sign

  3. Soraa Is Optimizing the Use of Non-Polar and Semi-Polar Substrates to Improve Emitter Efficiency Under High-Current Operation

    Broader source: Energy.gov [DOE]

    One of the biggest remaining technological hurdles for LED lighting, efficiency droop is the term given to the rapid drop-off in efficiency as the driving current is increased. Since higher...

  4. Water-Efficiency Program Prioritization

    Broader source: Energy.gov [DOE]

    Presentation outlines water-efficiency program requirements and priorities as presented to Federal agencies by the Federal Energy Management Program.

  5. Sandia National Laboratories: Energy Efficiency

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

    Mobile Lighting Applications On March 29, 2013, in Capabilities, CRF, Energy, Energy Efficiency, Facilities, Partnership, Research & Capabilities, Transportation Energy Highway...

  6. Energy Efficiency Best Practice Guide©

    E-Print Network [OSTI]

    Rouse, S.

    ENERGY EFFICIENCY BEST PRACTICE GUIDE@ Scott Rouse Manager Energy Efficiency Department Ontario Power Generation Inc. Toronto, Ontario, Canada (416) 592-8044 srouse@ontariopowergeneration.com ABSTRACT 'Setting the bar above mere... mediocrity!' The goal of the Energy Efficiency (EE) Best Practice Guide is to help business units meet and exceed their energy efficiency targets through continuous improvement using seven key criteria. The objectives are threefold: - to provide an easy...

  7. Energy Efficiency Improvement and Cost Saving Opportunities for the Dairy Processing Industry

    E-Print Network [OSTI]

    Brush, Adrian

    2012-01-01T23:59:59.000Z

    Characterization: Gas Turbines. Arlington, Virginia.is higher than that of a gas turbine-based CHP system (74%electrical efficiency of a gas turbine-based CHP system is

  8. ENI Renewable and Non-conventional Energy Prize 2012 High-efficiency solar cells based on nanophotonic design

    E-Print Network [OSTI]

    Polman, Albert

    new solar cell designs that enable both a higher photovoltaic conversion efficiency and reduced) Photonic design principles for ultrahigh-efficiency photovoltaics, A. Polman and H.A. Atwater, Nature MaterENI Renewable and Non-conventional Energy Prize 2012 High-efficiency solar cells based

  9. Energy Efficiency and Channel Allocation in Huaizhou SHI, Vijay S Rao, R. Venkatesha Prasad, I.G.M.M. Niemegeers

    E-Print Network [OSTI]

    Kuzmanov, Georgi

    Energy Efficiency and Channel Allocation in P2PWRAN Huaizhou SHI, Vijay S Rao, R. Venkatesha Prasad capacity signifi- cantly, reducing the total energy consumption is a challenge.The energy efficiency to the BS is relatively static. P2PWRAN enables to achieve higher energy efficiency through better

  10. Impact of Storage Time on the Needed Capture Efficiency for Volatile Radionuclides - 13369

    SciTech Connect (OSTI)

    Jubin, R.T.; Ilas, G. [Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, TN 37849 (United States)] [Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, TN 37849 (United States); Soelberg, N.R. [Idaho National Laboratory (United States)] [Idaho National Laboratory (United States); Strachan, D.M. [Pacific Northwest National Laboratory (United States)] [Pacific Northwest National Laboratory (United States)

    2013-07-01T23:59:59.000Z

    During the processing of used nuclear fuel (UNF), volatile radionuclides will be discharged from the facility stack if no recovery processes are in place to limit their release. The volatile radionuclides of concern are {sup 3}H, {sup 14}C, {sup 85}Kr, and {sup 129}I. There are three key regulations that address the release of these radionuclides to the environment- 40 CFR 61, 40 CFR 190, and 10 CFR 20. These regulations apply to the total radionuclide release and establish dose limits for the maximum exposed individual (MEI) in the public both in terms of whole body dose and dose to specific organs such as the thyroid. Each radionuclide released to the environment contributes to the total dose to some degree. In this paper we attempt to evaluate the efficiency requirements for the capture processes to limit the doses to the MEI to regulatory levels. Since the total amount of each volatile radionuclide present in the UNF changes with the age of the fuel, the respective capture requirements also change with time. Specifically, we are interested in the impact of the decreasing contribution of {sup 3}H and {sup 85}Kr, which have relatively short half-lives, 12.32 y and 10.76 y, respectively, with the increasing age of the fuel (i.e., time between when the UNF is removed from the reactor and the time it is processed) on the capture requirements. In this paper we examine the capture requirements for these four radionuclides for three fuel types (pressurized water reactor [PWR] with uranium oxide fuel [UOX], PWR with mixed oxide fuel [MOX], and an advanced high temperature gas-cooled reactor [AHTGR]), several burnup values, and time out of reactor extending to 200 y. We calculate doses to the MEI with the EPA code CAP-88 and look at two dose contribution cases. In the first case, we assume that the total allowable dose is attributed to only the four volatile radionuclides. This establishes the lowest capture efficiency value possible. Since this is unrealistic, because it assumes zero dose contribution from all other radionuclides, we also examine a second case, where only 10% of the allowable dose is assigned to the four volatile radionuclides. We calculate the required decontamination factors (DFs) for both of these cases for the three fuel types, multiple fuel burnups, and fuel ages and determine whether or not the dose to the whole body or to the thyroid that drives the capture requirements would require additional effluent controls for the shorter half-life volatile radionuclides based on dose considerations. This analysis indicates that the principal isotopes of concern are generally {sup 3}H and {sup 129}I, the latter requiring the highest DFs. The maximum DF value for {sup 129}I is 8000 for the evaluated cases and assumptions used. ?60 for fresh fuels. The DF for {sup 14}C could be as high as 30 for certain fuels. These values are based on just meeting the regulatory limits, and additional engineering margins (perhaps 3x to 10x or higher) should be applied to provide a safety factor for compliance. However, by assuming less conservative dose allocations, taller stacks, different radionuclide speciation, fuel aging, and other reprocessing facility design and location parameters, the DF requirements could be significantly reduced. (authors)

  11. 2008 BUILDING ENERGY EFFICIENCY STANDARDS

    E-Print Network [OSTI]

    2008 BUILDING ENERGY EFFICIENCY STANDARDS C A L I F O R N I A E N E RGY CO M M I S S I O N Buildings and Appliances Office #12;Acknowledgments The Building Energy Efficiency Standards (Standards and consultants. Valerie Hall, Deputy Director of the Energy Efficiency and Renewable Division provided policy

  12. The Economics of Energy Efficiency

    E-Print Network [OSTI]

    California at Davis, University of

    The Economics of Energy Efficiency Winter 2013 Why does Comcast give you set-top boxes that use the adoption of more energy- efficient technologies. This course will mostly not cover the "big picture landlord insulate the attic? What makes an investment in energy efficiency attractive? How does a company

  13. CCPPolicyBriefing Efficiency, TFP,

    E-Print Network [OSTI]

    Feigon, Brooke

    CCPPolicyBriefing May 2009 Efficiency, TFP, Catch-Up and Innovation and Mobile Telecoms Reform W to efficiency, total factor productivity, catch-up and innovation, and mobile telecommunications reform (1995 in the mobile telecommunications sector. The efficiency and total factor productivity of 22 mobile carriers

  14. U.S. Energy Information Administration (EIA) - Sector

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

    lower costs, and higher efficiencies assumed for more advanced equipment. Building shell efficiencies for new construction meet ENERGY STAR requirements after 2015....

  15. Superefficient Refrigerators: Opportunities and Challenges for Efficiency Improvement Globally

    SciTech Connect (OSTI)

    Shah, Nihar; Park, Won Young; Bojda, Nicholas; McNeil, Michael A.

    2014-08-01T23:59:59.000Z

    As an energy-intensive mainstream product, residential refrigerators present a significant opportunity to reduce electricity consumption through energy efficiency improvements. Refrigerators expend a considerable amount of electricity during normal use, typically consuming between 100 to 1,000 kWh of electricity per annum. This paper presents the results of a technical analysis done for refrigerators in support of the Super-efficient Equipment and Appliance Deployment (SEAD) initiative. Beginning from a base case representative of the average unit sold in India, we analyze efficiency improvement options and their corresponding costs to build a cost-versus-efficiency relationship. We then consider design improvement options that are known to be the most cost effective and that can improve efficiency given current design configurations. We also analyze and present additional super-efficient options, such as vacuum-insulated panels. We estimate the cost of conserved electricity for the various options, allowing flexible program design for market transformation programs toward higher efficiency. We estimate ~;;160TWh/year of energy savings are cost effective in 2030, indicating significant potential for efficiency improvement in refrigerators in SEAD economies and China.

  16. Energy Efficiency and Energy Policy 

    E-Print Network [OSTI]

    Claridge, D.

    2014-01-01T23:59:59.000Z

    Energy Efficiency and Energy Policy David E. Claridge, Director Energy Systems Laboratory November 19, 2014 ESL-KT-14-11-17 CATEE 2014: Clean Air Through Efficiency Conference, Dallas, Texas Nov. 18-20 50 Years of Automobile Improvements ? 1960s...: Clean Air Through Efficiency Conference, Dallas, Texas Nov. 18-20 Impact of Auto/Truck Efficiency Increases ? Autos/light trucks used energy = Energy Imports in 2012 ? AUTO/TRUCK EFFICIENCY IMPROVEMENTS have CUT U.S. ENERGY IMPORTS IN HALF ESL...

  17. Energy Efficiency and Energy Policy

    E-Print Network [OSTI]

    Claridge, D.

    2014-01-01T23:59:59.000Z

    Energy Efficiency and Energy Policy David E. Claridge, Director Energy Systems Laboratory November 19, 2014 ESL-KT-14-11-17 CATEE 2014: Clean Air Through Efficiency Conference, Dallas, Texas Nov. 18-20 50 Years of Automobile Improvements ? 1960s...: Clean Air Through Efficiency Conference, Dallas, Texas Nov. 18-20 Impact of Auto/Truck Efficiency Increases ? Autos/light trucks used energy = Energy Imports in 2012 ? AUTO/TRUCK EFFICIENCY IMPROVEMENTS have CUT U.S. ENERGY IMPORTS IN HALF ESL...

  18. Refines Efficiency Improvement

    SciTech Connect (OSTI)

    WRI

    2002-05-15T23:59:59.000Z

    Refinery processes that convert heavy oils to lighter distillate fuels require heating for distillation, hydrogen addition or carbon rejection (coking). Efficiency is limited by the formation of insoluble carbon-rich coke deposits. Heat exchangers and other refinery units must be shut down for mechanical coke removal, resulting in a significant loss of output and revenue. When a residuum is heated above the temperature at which pyrolysis occurs (340 C, 650 F), there is typically an induction period before coke formation begins (Magaril and Aksenova 1968, Wiehe 1993). To avoid fouling, refiners often stop heating a residuum before coke formation begins, using arbitrary criteria. In many cases, this heating is stopped sooner than need be, resulting in less than maximum product yield. Western Research Institute (WRI) has developed innovative Coking Index concepts (patent pending) which can be used for process control by refiners to heat residua to the threshold, but not beyond the point at which coke formation begins when petroleum residua materials are heated at pyrolysis temperatures (Schabron et al. 2001). The development of this universal predictor solves a long standing problem in petroleum refining. These Coking Indexes have great potential value in improving the efficiency of distillation processes. The Coking Indexes were found to apply to residua in a universal manner, and the theoretical basis for the indexes has been established (Schabron et al. 2001a, 2001b, 2001c). For the first time, a few simple measurements indicates how close undesired coke formation is on the coke formation induction time line. The Coking Indexes can lead to new process controls that can improve refinery distillation efficiency by several percentage points. Petroleum residua consist of an ordered continuum of solvated polar materials usually referred to as asphaltenes dispersed in a lower polarity solvent phase held together by intermediate polarity materials usually referred to as resins. The Coking Indexes focus on the amount of these intermediate polarity species since coke formation begins when these are depleted. Currently the Coking Indexes are determined by either titration or solubility measurements which must be performed in a laboratory. In the current work, various spectral, microscopic, and thermal techniques possibly leading to on-line analysis were explored for measuring the Coking Indexes.

  19. High Efficiency Integrated Package

    SciTech Connect (OSTI)

    Ibbetson, James

    2013-09-15T23:59:59.000Z

    Solid-state lighting based on LEDs has emerged as a superior alternative to inefficient conventional lighting, particularly incandescent. LED lighting can lead to 80 percent energy savings; can last 50,000 hours – 2-50 times longer than most bulbs; and contains no toxic lead or mercury. However, to enable mass adoption, particularly at the consumer level, the cost of LED luminaires must be reduced by an order of magnitude while achieving superior efficiency, light quality and lifetime. To become viable, energy-efficient replacement solutions must deliver system efficacies of ? 100 lumens per watt (LPW) with excellent color rendering (CRI > 85) at a cost that enables payback cycles of two years or less for commercial applications. This development will enable significant site energy savings as it targets commercial and retail lighting applications that are most sensitive to the lifetime operating costs with their extended operating hours per day. If costs are reduced substantially, dramatic energy savings can be realized by replacing incandescent lighting in the residential market as well. In light of these challenges, Cree proposed to develop a multi-chip integrated LED package with an output of > 1000 lumens of warm white light operating at an efficacy of at least 128 LPW with a CRI > 85. This product will serve as the light engine for replacement lamps and luminaires. At the end of the proposed program, this integrated package was to be used in a proof-of-concept lamp prototype to demonstrate the component’s viability in a common form factor. During this project Cree SBTC developed an efficient, compact warm-white LED package with an integrated remote color down-converter. Via a combination of intensive optical, electrical, and thermal optimization, a package design was obtained that met nearly all project goals. This package emitted 1295 lm under instant-on, room-temperature testing conditions, with an efficacy of 128.4 lm/W at a color temperature of ~2873K and 83 CRI. As such, the package’s performance exceeds DOE’s warm-white phosphor LED efficacy target for 2013. At the end of the program, we assembled an A19 sized demonstration bulb housing the integrated package which met Energy Star intensity variation requirements. With further development to reduce overall component cost, we anticipate that an integrated remote converter package such as developed during this program will find application in compact, high-efficacy LED-based lamps, particularly those requiring omnidirectional emission.

  20. SUPERCONNECTIONS AND HIGHER INDEX THEORY Department of Mathematics

    E-Print Network [OSTI]

    Lott, John

    SUPERCONNECTIONS AND HIGHER INDEX THEORY John Lott Department of Mathematics University of Michigan of the "higher" index of a Dirac-type operator on M. Using superconnections, we give a heat equation proof

  1. Assessment of the Emissions Behavior of Higher Mileage Class...

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

    the Emissions Behavior of Higher Mileage Class-8 Trucks and Engines Assessment of the Emissions Behavior of Higher Mileage Class-8 Trucks and Engines Study of in-use emission...

  2. Development of Large Format Lithium Ion Cells with Higher Energy...

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

    Large Format Lithium Ion Cells with Higher Energy Density Exceeding 500WhL Development of Large Format Lithium Ion Cells with Higher Energy Density Exceeding 500WhL 2012 DOE...

  3. Higher Derivative Corrections to O-Plane Actions 

    E-Print Network [OSTI]

    Wang, Zhao

    2014-11-17T23:59:59.000Z

    Higher derivative corrections to effective actions are very important and of great interest in string theory. The aim of this dissertation is to develop a method to constrain the higher derivative corrections to O-plane ...

  4. Higher order antibunching is not a rare phenomenon

    E-Print Network [OSTI]

    Prakash Gupta; Pratap Narayan Pandey; Anirban Pathak

    2005-08-08T23:59:59.000Z

    Since the introduction of higher order nonclassical effects, higher order squeezing has been reported in a number of different physical systems but higher order antibunching is predicted only in three particular cases. In the present work, we have shown that the higher order antibunching is not a rare phenomenon rather it can be seen in many simple optical processes. To establish our claim, we have shown it in six wave mixing process, four wave mixing process and in second harmonic generation process.

  5. Energy efficient distillation apparatus

    SciTech Connect (OSTI)

    Melton, J.D.

    1982-08-17T23:59:59.000Z

    An energy efficient distillation method is provided which is particularly adapted for use on a dairy farm, and which comprises a distilland evaporating receptacle, a distillate condensing receptacle, and a conduit interconnecting the evaporating receptacle and the condensing receptacle. A vacuum pump is provided for drawing a partial vacuum within the evaporating receptacle, and a vapor compression refrigeration system is provided which includes condenser coils disposed to heat and vaporize the distilland while it is within the evaporating receptacle, and evaporator coils for cooling and condensing the vaporized distilland in the condensing receptacle. A cooling distribution system is also provided whereby a variable portion of the cooling potential of the refrigeration system may be selectively directed to each of the condensing receptacle, a distillate receiver tank, or to a bulk milk container as utilized on a dairy farm or the like.

  6. Implications of Low Particulate Matter Emissions on System Fuel Efficiency for High Efficiency Clean Combustion

    SciTech Connect (OSTI)

    Parks, II, James E [ORNL; Prikhodko, Vitaly Y [ORNL] [ORNL

    2009-01-01T23:59:59.000Z

    Advanced diesel combustion regimes such as High Efficiency Clean Combustion (HECC) offer the benefits of reduced engine out NOX and particulate matter (PM) emissions. Lower PM emissions during advanced combustion reduce the demand on diesel particulate filters (DPFs) and can, thereby, reduce the fuel penalty associated with DPF regeneration. In this study, a SiC DPF was loaded and regenerated on a 1.7-liter 4-cylinder diesel engine operated in conventional and advanced combustion modes at different speed and load conditions. A diesel oxidation catalyst (DOC) and a lean NOX trap (LNT) were also installed in the exhaust stream. Five steady-state speed and load conditions were weighted to estimate Federal Test Procedure (FTP) fuel efficiency. The DPF was loaded using lean-rich cycling with frequencies that resulted in similar levels of NOX emissions downstream of the LNT. The pressure drop across the DPF was measured at a standard point (1500 rpm, 5.0 bar) before and after loading, and a P rise rate was determined for comparison between conventional and advanced combustion modes. Higher PM emissions in conventional combustion resulted in a higher rate of backpressure rise across the DPF at all of the load points leading to more frequent DPF regenerations and higher fuel penalty. The fuel penalty during conventional combustion was 4.2% compared with 3.1% for a mixture of conventional and advanced modes.

  7. UPGRADING THE CEBAF INJECTOR WITH A NEW BOOSTER, HIGHER VOLTAGE GUN, AND HIGHER FINAL ENERGY

    SciTech Connect (OSTI)

    Reza Kazimi, Arne Freyberger, Alicia Hofler, Andrew Hutton, Fay Hannon

    2012-07-01T23:59:59.000Z

    The Continuous Electron Beam Accelerator Facility (CEBAF) accelerator at Jefferson Lab will be upgraded from 6 GeV to 12 GeV in the next few years. To meet the requirement of the new machine and to take the opportunity to improve the beam quality, the CEBAF injector will be upgraded with a higher voltage gun, a new booster, and a new accelerating RF module. The CEBAF injector creates and accelerates three beams at different currents simultaneously. The beams are interleaved, each at one third of the RF frequency, traveling through the same beam line. The higher voltage gun will lower the space charge effects. The new booster with optimized beam dynamics will complete the bunching process and provide initial acceleration matched to the new gun voltage. Using our latest SRF design, the new booster has significantly lower x/y coupling effects that should improve our beam setup and operation for the highly sensitive parity experiments scheduled for the CEBAF's future. Finally, the new accelerating RF module will roughly double the injector final energy to match the rest of the 12 GeV accelerator. In this paper we will provide more detail about this upgrade.

  8. STATE OF COLORADO DEPARTMENT OF HIGHER EDUCATION John Hickenlooper

    E-Print Network [OSTI]

    STATE OF COLORADO DEPARTMENT OF HIGHER EDUCATION John Hickenlooper Governor Lt. Gov. Joseph A-YEAR INSTITUTIONS OF HIGHER EDUCATION Colorado State University-Ft Collins Metropolitan State University of Denver number of credits designated by the Colorado Commission on Higher Education. The guarantees

  9. STATE OF COLORADO DEPARTMENT OF HIGHER EDUCATION John Hickenlooper

    E-Print Network [OSTI]

    STATE OF COLORADO DEPARTMENT OF HIGHER EDUCATION John Hickenlooper Governor Lt. Gov. Joseph A-YEAR INSTITUTIONS OF HIGHER EDUCATION Colorado State University-Ft Collins Fort Lewis College Metropolitan State Commission on Higher Education. The guarantees and limitations below describe the minimum requirements

  10. Fresh Water Increased temperature means higher proportion of water

    E-Print Network [OSTI]

    Houston, Paul L.

    Fresh Water Increased temperature means higher proportion of water falling on surface higher evaporation higher rainfall greater intensity of floods and droughts. Water use has grown four on How much storage compared to average flow Demand as percentage of supply How much ground water is used

  11. Quantum Gravity in Three Dimensions from Higher-Spin Holography

    E-Print Network [OSTI]

    Tan, Hai Siong

    2013-01-01T23:59:59.000Z

    Higher Spin Anti-de Sitter Gravity,” JHEP 1012, 007 (2010)gravity in three dimensions from the per- spective of higher-spin holography in anti-gravity in three dimen- sions in the framework of higher-spin holography in anti-

  12. Investigation into the Emissions and Efficiency of Low Temperature Diesel Combustion

    E-Print Network [OSTI]

    Knight, Bryan Michael

    2011-10-21T23:59:59.000Z

    to reduce green house gas emissions and increase the fuel efficiency of our vehicles. A particular solution to this problem is the diesel engine, with its inherently fuel-lean combustion, which gives rise to low CO2 production and higher efficiencies than...

  13. Context-aware energy-efficient wireless sensor architecture for body activity recognition

    E-Print Network [OSTI]

    Boyer, Edmond

    conditions [13], [15], [16], and the usage of devices with higher computing, storage and energy capabilitiesContext-aware energy-efficient wireless sensor architecture for body activity recognition Tifenn 60205 Compiègne, France Abstract--In this paper, we present EEWAA, a new Energy- Efficient Wireless

  14. Investigation into the Emissions and Efficiency of Low Temperature Diesel Combustion 

    E-Print Network [OSTI]

    Knight, Bryan Michael

    2011-10-21T23:59:59.000Z

    to reduce green house gas emissions and increase the fuel efficiency of our vehicles. A particular solution to this problem is the diesel engine, with its inherently fuel-lean combustion, which gives rise to low CO2 production and higher efficiencies than...

  15. Effects of Higher Carbohydrate or Higher Protein Diets with Exercise on Individual Risk Factors of Metabolic Syndrome in Women 

    E-Print Network [OSTI]

    Lockard, Brittanie

    2014-03-18T23:59:59.000Z

    Blood Pressure DEXA Dual Energy X-Ray Absorptiometry ESNL Exercise and Sport Nutrition Lab FFM Fat Free Mass FM Fat Mass HC Higher Carbohydrate Diet HDL High Density Lipoprotein HP Higher Protein Diet IDF International Diabetes Foundation LDL...

  16. Medium dependence of asphaltene agglomeration inhibitor efficiency

    E-Print Network [OSTI]

    Mariana Barcenas; Pedro Orea; Eduardo Buenrostro-Gonzalez; Luis S. Zamudio-Rivera; Yurko Duda

    2007-10-05T23:59:59.000Z

    Applying chemical additives (molecule inhibitors or dispersants) is one of the common ways to control asphaltene agglomeration and precipitation. However, it is not clear why at some conditions the synthetic flocculation inhibitors as well as resins not only do not inhibit the asphaltene agglomeration,, they may also promote it, and why the increasing of the additive concentration may lead to the diminishing of their efficacy. To clarify this issue, in the present work we have performed a set of vapor preassure osmometry experiments investigating the asphaltene agglomeration inhibition by commercial and new inhibitor molecules in toluene and o-diclorobenzene. Monte Carlo computer modeling has been applied to interpret some unexpected trends of molar mass of the Puerto Ceiba asphaltene clusters at different concentrations of inhibitor, assuming that inhibitors efficiency is directly related to their adsorption on the surface of asphaltene or its complexes. It has been found that a self-assembly of inhibitor molecules, induced by relative lyophilic or lyophobic interactions, may be a reason of the inhibitor efficacy declining.

  17. Productivity benefits of industrial energy efficiency measures

    E-Print Network [OSTI]

    Worrell, Ernst

    2011-01-01T23:59:59.000Z

    linkage between energy efficiency and productivity. Energyand increased energy efficiency in integrated paper andand Office of Energy Efficiency and Renewable Energy, 1997.

  18. Productivity benefits of industrial energy efficiency measures

    E-Print Network [OSTI]

    Worrell, Ernst

    2011-01-01T23:59:59.000Z

    the linkage between energy efficiency and productivity.and increased energy efficiency in integrated paper andand Office of Energy Efficiency and Renewable Energy, 1997.

  19. Coordination of Energy Efficiency and Demand Response

    E-Print Network [OSTI]

    Goldman, Charles

    2010-01-01T23:59:59.000Z

    California Long-term Energy Efficiency Strategic Plan. B-2 Coordination of Energy Efficiency and Demand Response> B-4 Coordination of Energy Efficiency and Demand Response

  20. Coordination of Energy Efficiency and Demand Response

    E-Print Network [OSTI]

    Goldman, Charles

    2010-01-01T23:59:59.000Z

    in peak demand. This definition of energy efficiency makesthe following definitions are used: Energy efficiency refersThis definition implicitly distinguishes energy efficiency

  1. Southeast Energy Efficiency Alliance Data Dashboard | Department...

    Energy Savers [EERE]

    Southeast Energy Efficiency Alliance Data Dashboard Southeast Energy Efficiency Alliance Data Dashboard The data dashboard for Southeast Energy Efficiency Alliance, a partner in...

  2. Sandia National Laboratories: Enabling Energy Efficiency

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

    ClimateEnabling Energy Efficiency Enabling Energy Efficiency videobanner Enabling Energy Efficiency Sp eakers: George Wang (EFRC Thrust Leader) and Tania Henry(Researcher) Date:...

  3. Energy Efficiency in Regulated and Deregulated Markets

    E-Print Network [OSTI]

    Rotenberg, Edan

    2005-01-01T23:59:59.000Z

    establishing what energy efficiency, regulation, and der-policy justifications for energy efficiency regulations. Thesector. ENERGY EFFICIENCY UNDER REGULATION This section

  4. Energy Efficiency Fund (Gas)- Commercial and Industrial Energy Efficiency Programs

    Broader source: Energy.gov [DOE]

    Through the Connecticut Energy Efficiency Fund, rebates are available for commercial, industrial or municipal customers of Connecticut Natural Gas Corporation, Southern Connecticut Gas Company, or...

  5. Computationally Efficient Modeling of High-Efficiency Clean Combustion...

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

    Peer Evaluation ace012aceves2011o.pdf More Documents & Publications Simulation of High Efficiency Clean Combustion Engines and Detailed Chemical Kinetic Mechanisms Development...

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

    SciTech Connect (OSTI)

    None

    2010-10-01T23:59:59.000Z

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

  7. Method and apparatus for improved efficiency in a pulse-width-modulated alternating current motor drive

    DOE Patents [OSTI]

    Konrad, C.E.; Boothe, R.W.

    1996-01-23T23:59:59.000Z

    A scheme for optimizing the efficiency of an AC motor drive operated in a pulse-width-modulated mode provides that the modulation frequency of the power furnished to the motor is a function of commanded motor torque and is higher at lower torque requirements than at higher torque requirements. 6 figs.

  8. Method and apparatus for improved efficiency in a pulse-width-modulated alternating current motor drive

    DOE Patents [OSTI]

    Konrad, C.E.; Boothe, R.W.

    1994-02-15T23:59:59.000Z

    A scheme for optimizing the efficiency of an AC motor drive operated in a pulse-width-modulated mode provides that the modulation frequency of the power furnished to the motor is a function of commanded motor torque and is higher at lower torque requirements than at higher torque requirements. 6 figures.

  9. Method and apparatus for improved efficiency in a pulse-width-modulated alternating current motor drive

    DOE Patents [OSTI]

    Konrad, Charles E. (Roanoke, VA); Boothe, Richard W. (Roanoke, VA)

    1994-01-01T23:59:59.000Z

    A scheme for optimizing the efficiency of an AC motor drive operated in a pulse-width-modulated mode provides that the modulation frequency of the power furnished to the motor is a function of commanded motor torque and is higher at lower torque requirements than at higher torque requirements.

  10. Method and apparatus for improved efficiency in a pulse-width-modulated alternating current motor drive

    DOE Patents [OSTI]

    Konrad, Charles E. (Roanoke, VA); Boothe, Richard W. (Roanoke, VA)

    1996-01-01T23:59:59.000Z

    A scheme for optimizing the efficiency of an AC motor drive operated in a pulse-width-modulated mode provides that the modulation frequency of the power furnished to the motor is a function of commanded motor torque and is higher at lower torque requirements than at higher torque requirements.

  11. Alternative Financing for Energy Efficiency 

    E-Print Network [OSTI]

    Trevino, E.

    2013-01-01T23:59:59.000Z

    Alternative Financing for Energy Efficiency • Eddy Trevino • Matt Golden – – Investor Confidence Project • Josh Briggs – QECBs • Michael Flores – High Performance New Construction • Denise Malloy – Performance Contracting for Public Sector... Improvement Projects ESL-KT-13-12-37 CATEE 2013: Clean Air Through Energy Efficiency Conference, San Antonio, Texas Dec. 16-18 Texas LoanSTAR Program 12/18/13 Maximizing Energy Efficiency while Protecting the Environment ESL-KT-13-12-37 CATEE 2013: Clean Air...

  12. Alternative Financing for Energy Efficiency

    E-Print Network [OSTI]

    Trevino, E.

    2013-01-01T23:59:59.000Z

    Alternative Financing for Energy Efficiency • Eddy Trevino • Matt Golden – – Investor Confidence Project • Josh Briggs – QECBs • Michael Flores – High Performance New Construction • Denise Malloy – Performance Contracting for Public Sector... Improvement Projects ESL-KT-13-12-37 CATEE 2013: Clean Air Through Energy Efficiency Conference, San Antonio, Texas Dec. 16-18 Texas LoanSTAR Program 12/18/13 Maximizing Energy Efficiency while Protecting the Environment ESL-KT-13-12-37 CATEE 2013: Clean Air...

  13. Optimisation of the Management of Higher Activity Waste in the UK - 13537

    SciTech Connect (OSTI)

    Walsh, Ciara; Buckley, Matthew [Nuclear Decommissioning Authority, Building 587, Curie Avenue, Harwell Oxford, Didcot, Oxfordshire, OX11 0RH (United Kingdom)] [Nuclear Decommissioning Authority, Building 587, Curie Avenue, Harwell Oxford, Didcot, Oxfordshire, OX11 0RH (United Kingdom)

    2013-07-01T23:59:59.000Z

    The Upstream Optioneering project was created in the Nuclear Decommissioning Authority (UK) to support the development and implementation of significant opportunities to optimise activities across all the phases of the Higher Activity Waste management life cycle (i.e. retrieval, characterisation, conditioning, packaging, storage, transport and disposal). The objective of the Upstream Optioneering project is to work in conjunction with other functions within NDA and the waste producers to identify and deliver solutions to optimise the management of higher activity waste. Historically, optimisation may have occurred on aspects of the waste life cycle (considered here to include retrieval, conditioning, treatment, packaging, interim storage, transport to final end state, which may be geological disposal). By considering the waste life cycle as a whole, critical analysis of assumed constraints may lead to cost savings for the UK Tax Payer. For example, it may be possible to challenge the requirements for packaging wastes for disposal to deliver an optimised waste life cycle. It is likely that the challenges faced in the UK are shared in other countries. It is therefore likely that the opportunities identified may also apply elsewhere, with the potential for sharing information to enable value to be shared. (authors)

  14. Note on the Existence of Hydrogen Atoms in Higher Dimensional Euclidean Spaces

    E-Print Network [OSTI]

    Francisco Caruso; Jordan Martins; Vitor Oguri

    2013-01-23T23:59:59.000Z

    The question of whether hydrogen atoms can exist or not in spaces with a number of dimensions greater than 3 is revisited, considering higher dimensional Euclidean spaces. Previous results which lead to different answers to this question are briefly reviewed. The scenario where not only the kinematical term of Schr\\"odinger equation is generalized to a D-dimensional space but also the electric charge conservation law (expressed here by the Poisson law) should actually remains valid is assumed. In this case, the potential energy in the Schr\\"odinger equation goes like 1/r^{D-2}. The lowest quantum mechanical bound states and the corresponding wave functions are determined by applying the Numerov numerical method to solve Schr\\"odinger's eigenvalue equation. States for different angular momentum quantum number (l = 0; 1) and dimensionality (5 \\leq D \\leq 10) are considered. One is lead to the result that hydrogen atoms in higher dimensions could actually exist. For the same range of the dimensionality D, the energy eigenvalues and wave functions are determined for l = 1. The most probable distance between the electron and the nucleus are then computed as a function of D showing the possibility of tiny bound states.

  15. Public Sector Electric Efficiency Programs

    Broader source: Energy.gov [DOE]

    The Illinois Department of Commerce and Economic Opportunity (DCEO) Bureau of Energy and Recycling administers the public sector energy efficiency programs required by the Illinois Energy...

  16. Light Duty Efficient Clean Combustion

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

    Efficient Clean Combustion February 27, 2008 Tim Frazier Research & Technology 2008 Semi-Mega Merit Review Agenda Project Goals and Objectives Project Partners Technical...

  17. Enabling High Efficiency Clean Combustion

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

    Efficiency Clean Combustion 2008 Semi-Mega Merit Review Donald Stanton Research & Technology February 26 th , 2008 This presentation does not contain any proprietary or...

  18. PROGRESS IN ENERGY EFFICIENT BUILDINGS

    E-Print Network [OSTI]

    Wall, L.W.

    2009-01-01T23:59:59.000Z

    I Figure 21. Sample building energy use label expressed inanalyses of actual buildings energy consumption data confirm1983. PROGRESS IN ENERGY EFFICIENT BUILDINGS Leonard W. Wall

  19. Energy Efficiency Standards for Appliances

    Broader source: Energy.gov [DOE]

    '' Note: The federal government has imposed and updated appliance efficiency standards through several legislative acts,* and now has standards in place or under development for 30 classes of...

  20. Appliance and Equipment Efficiency Standards

    Broader source: Energy.gov [DOE]

    '' Note: The federal government has imposed and updated appliance efficiency standards through several legislative acts,* and now has standards in place or under development for 30 classes of...

  1. NYSEG (Gas)- Residential Efficiency Program

    Broader source: Energy.gov [DOE]

    NYSEG is offering residential natural gas customers rebates for installing energy efficient equipment. Customers can complete one rebate application for multiple pieces of equipment as long as...

  2. Improve Your Boiler's Combustion Efficiency

    SciTech Connect (OSTI)

    Not Available

    2006-01-01T23:59:59.000Z

    This revised ITP tip sheet on boiler combustion efficiency provides how-to advice for improving industrial steam systems using low-cost, proven practices and technologies.

  3. Sandia National Laboratories: Energy Efficiency

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

    Energy Efficiency Vehicle Technologies On November 9, 2010, in Vehicle Technology programs at Sandia share a common goal: reducing dependence on petroleum-based fuels and...

  4. Energy Efficiency Program for Schools

    Broader source: Energy.gov [DOE]

    In an effort to encourage the design and construction of more energy efficient, sustainable schools, Executive Order EO 2006-1297 was signed on October 12, 2006.

  5. Unitil- Residential Energy Efficiency Programs

    Broader source: Energy.gov [DOE]

    Unitil offers New Hampshire residential customers a number of programs to encourage more energy efficient homes. The Energy Star Appliance Program provides rebates for clothes washers, air...

  6. Home Energy Efficiency Twitter Chat

    Broader source: Energy.gov [DOE]

    Did you miss our home energy efficiency Twitter Chat? We compiled the discussion so you can learn ways to save energy and money at home.

  7. Efficiency Projects and Water Reuse

    E-Print Network [OSTI]

    Pannell, B.

    2011-01-01T23:59:59.000Z

    Efficiency In A Small Utility Bill Pannell bill.pannell@cleburne.net City of Cleburne ESL-KT-11-11-36 ?Efficiency In A Small Utility Are We As Efficient As We Can Be?? Reduce Water ?Loss? Thru Better Auditing And Metering Improvements... Saving $$$ With Efficient Aeration Question And Answer Session Water Loss Energy Q&A Reuse Expanding Water System Capacity By Creative Reuse Water Development ESL-KT-11-11-36 ? What is ?Loss?? ? What is ?Real loss?? ? ?Apparent Loss...

  8. Commercial Energy Efficiency Rebate Program

    Broader source: Energy.gov [DOE]

    Hawaii Energy is a ratepayer-funded conservation and efficiency program administered by Leidos Engineering, LLC under contract with the Hawaii Public Utilities Commission serving the islands of...

  9. Improving Solar-Cell Efficiency

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

    2003 | 2002 2001 | 2000 | 1998 | Subscribe to APS Science Highlights rss feed Improving Solar Cell Efficiency October 7, 2014 Bookmark and Share The two-dimensional grazing...

  10. Citizens Gas- Residential Efficiency Rebates

    Broader source: Energy.gov [DOE]

    Citizens Gas of Indiana offers rebates to its residential customers for the installation of several types of efficient natural gas appliances. Rebates are generally available for residential homes...

  11. National Grid Energy Efficiency Plans

    Broader source: Energy.gov [DOE]

    Presentation covers the National Grid Energy Efficiency plans and is given at the Spring 2010 Federal Utility Partnership Working Group (FUPWG) meeting in Providence, Rhode Island.

  12. Sandia National Laboratories: Energy Efficiency

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

    understanding of the competing physical processes that determine light-emission efficiency of InGaN materials and heterostructures. With such understanding, new routes to...

  13. Pareto Efficiency in Robust Optimization

    E-Print Network [OSTI]

    2012-09-14T23:59:59.000Z

    This paper formalizes and adapts the well known concept of Pareto efficiency in the context of the popular robust optimization (RO) methodology. We argue that ...

  14. Sandia National Laboratories: Energy Efficiency

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

    Dots that Increases the Quantum Yield to 95.5% On May 23, 2013, in Energy, Energy Efficiency, Materials Science, News, News & Events, Office of Science, Research & Capabilities,...

  15. Sandia National Laboratories: Energy Efficiency

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

    Energy Efficiency Publications, Presentations, Videos On February 3, 2012, in EFRC Selected Publications Dai, Qi; Shan, Qifeng; Cho, Jaehee; Schubert, E. Fred; Crawford, Mary H.;...

  16. National Grid Energy Efficiency Programs

    Broader source: Energy.gov [DOE]

    Presentation covers the National Grid Energy Efficiency programs and is given at the Spring 2010 Federal Utility Partnership Working Group (FUPWG) meeting in Providence, Rhode Island.

  17. Electrofuels: More Efficient Than Photosynthesis

    Broader source: Energy.gov [DOE]

    The Advanced Research Projects Agency -- Energy (ARPA-E) has funded successful programs with OPXBIO, NC State and others to create hyper efficient processes for manufacturing biofuels and...

  18. Enabling High Efficiency Clean Combustion

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

    penalty associated with aftertreatment 3% improvement in open cycle efficiency (turbo, EGR system, etc.) 8 This presentation does not contain any proprietary or...

  19. Energy Efficiency Tax Credits (Personal)

    Broader source: Energy.gov [DOE]

    In April 2008, Kentucky enacted legislation allowing a 30% state income tax credit for taxpayers who install certain energy efficiency measures on their principal residence or residential rental...

  20. SPAR Model Structural Efficiencies

    SciTech Connect (OSTI)

    John Schroeder; Dan Henry

    2013-04-01T23:59:59.000Z

    The Nuclear Regulatory Commission (NRC) and the Electric Power Research Institute (EPRI) are supporting initiatives aimed at improving the quality of probabilistic risk assessments (PRAs). Included in these initiatives are the resolution of key technical issues that are have been judged to have the most significant influence on the baseline core damage frequency of the NRC’s Standardized Plant Analysis Risk (SPAR) models and licensee PRA models. Previous work addressed issues associated with support system initiating event analysis and loss of off-site power/station blackout analysis. The key technical issues were: • Development of a standard methodology and implementation of support system initiating events • Treatment of loss of offsite power • Development of standard approach for emergency core cooling following containment failure Some of the related issues were not fully resolved. This project continues the effort to resolve outstanding issues. The work scope was intended to include substantial collaboration with EPRI; however, EPRI has had other higher priority initiatives to support. Therefore this project has addressed SPAR modeling issues. The issues addressed are • SPAR model transparency • Common cause failure modeling deficiencies and approaches • Ac and dc modeling deficiencies and approaches • Instrumentation and control system modeling deficiencies and approaches

  1. Northeast Energy Efficiency Partnerships: Advanced Lighting Controls...

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

    Northeast Energy Efficiency Partnerships: Advanced Lighting Controls - 2015 Peer Review Northeast Energy Efficiency Partnerships: Advanced Lighting Controls - 2015 Peer Review...

  2. Overcoming Common Pitfalls: Energy Efficient Lighting Projects...

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

    Overcoming Common Pitfalls: Energy Efficient Lighting Projects Overcoming Common Pitfalls: Energy Efficient Lighting Projects Transcript Presentation More Documents & Publications...

  3. Stretch Efficiency - Thermodynamic Analysis of New Combustion...

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

    Stretch Efficiency - Thermodynamic Analysis of New Combustion Regimes (Agreement 10037) Stretch Efficiency - Thermodynamic Analysis of New Combustion Regimes (Agreement 10037)...

  4. Administering Nonprofit Energy Efficiency Programs | Department...

    Energy Savers [EERE]

    Administering Nonprofit Energy Efficiency Programs Administering Nonprofit Energy Efficiency Programs Better Buildings Neighborhood Program Peer Exchange Call: Administering...

  5. Quadrennial Technology Review Vehicle Efficiency and Electrification...

    Energy Savers [EERE]

    Quadrennial Technology Review Vehicle Efficiency and Electrification Workshop Documents Quadrennial Technology Review Vehicle Efficiency and Electrification Workshop Documents QTR...

  6. Complementary State Policies for Energy Efficiency Programs ...

    Energy Savers [EERE]

    for Energy Efficiency Programs Better Buildings Residential Network Program Sustainability Peer Exchange Call: Complementary State Policies for Energy Efficiency Programs,...

  7. Energy Efficiency and Renewable Energy Postdoctoral Research...

    Office of Environmental Management (EM)

    Postdoctoral Research Awards Energy Efficiency and Renewable Energy Postdoctoral Research Awards Contacts Energy Efficiency and Renewable Energy Postdoctoral Research Awards...

  8. Concentrating Solar Power: Efficiently Leveraging Equilibrium...

    Office of Environmental Management (EM)

    Concentrating Solar Power: Efficiently Leveraging Equilibrium Mechanisms for Engineering New Thermochemical Storage Concentrating Solar Power: Efficiently Leveraging Equilibrium...

  9. Efficiency Considerations of Diesel Premixed Charge Compression...

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

    Efficiency Considerations of Diesel Premixed Charge Compression Ignition Combustion Efficiency Considerations of Diesel Premixed Charge Compression Ignition Combustion Poster...

  10. Renewable Energy & Energy Efficiency Projects: Loan Guarantee...

    Energy Savers [EERE]

    Renewable Energy & Energy Efficiency Projects: Loan Guarantee Solicitation Renewable Energy & Energy Efficiency Projects: Loan Guarantee Solicitation Plenary III: Project Finance...

  11. Coordinating Energy Efficiency with Other Disaster Resiliency...

    Energy Savers [EERE]

    Coordinating Energy Efficiency with Other Disaster Resiliency Services Coordinating Energy Efficiency with Other Disaster Resiliency Services Better Buildings Residential Network...

  12. National Residential Efficiency Measures Database Webinar Slides...

    Energy Savers [EERE]

    National Residential Efficiency Measures Database Webinar Slides National Residential Efficiency Measures Database Webinar Slides Presentation slides for the Building Technologies...

  13. Coordinating Energy Efficiency With Water Conservation Services...

    Energy Savers [EERE]

    Coordinating Energy Efficiency With Water Conservation Services Coordinating Energy Efficiency With Water Conservation Services Better Buildings Residential Network Program...

  14. Incorporating Energy Efficiency into Disaster Recovery Efforts...

    Energy Savers [EERE]

    Incorporating Energy Efficiency into Disaster Recovery Efforts Incorporating Energy Efficiency into Disaster Recovery Efforts Better Buildings Residential Network Program...

  15. Clean Energy Manufacturing Initiative Industrial Efficiency and...

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

    Industrial Efficiency and Energy Productivity Video Clean Energy Manufacturing Initiative Industrial Efficiency and Energy Productivity Video Addthis Description Industrial...

  16. Conference Agenda: Residential Energy Efficiency Solutions 2012...

    Energy Savers [EERE]

    Conference Agenda: Residential Energy Efficiency Solutions 2012 Conference Agenda: Residential Energy Efficiency Solutions 2012 Presents conference agenda including a general...

  17. Efficiency First - Contractor Outreach: Design & Implementation...

    Energy Savers [EERE]

    Efficiency First - Contractor Outreach: Design & Implementation for Residential Retrofit Programs Efficiency First - Contractor Outreach: Design & Implementation for Residential...

  18. Dynamic workload characterization for energy efficient computing

    E-Print Network [OSTI]

    Dhiman, Gaurav

    2011-01-01T23:59:59.000Z

    overall energy efficiency and performance. The basic premiseenergy efficiency and performance in terms of instruction throughput. The basic premise

  19. Applying thermodynamics constraints to the model achieves higher growth rates and flux efficiency while still adhering to

    E-Print Network [OSTI]

    Barthelat, Francois

    -added biomateri- als from wastewater (bioplastics and biofuels) Genome-scale metabolic model of Rhodococcus jostii

  20. Scientists at the National Renewable Energy Laboratory (NREL) invent a deep green LED that can lead to higher-efficiency

    E-Print Network [OSTI]

    Scientists at the National Renewable Energy Laboratory (NREL) invent a deep green LED that can lead by the so-called "green gap:"the inability to develop light in the green spectrum that can be combined with red and blue to produce white light. NREL researchers conceptualized a green emission by taking

  1. Improvement of Sweep Efficiency in Gasflooding

    SciTech Connect (OSTI)

    Kishore Mohanty

    2008-12-31T23:59:59.000Z

    Miscible and near-miscible gasflooding has proven to be one of the few cost effective enhance oil recovery techniques in the past twenty years. As the scope of gas flooding is being expanded to medium viscosity oils in shallow sands in Alaska and shallower reservoirs in the lower 48, there are questions about sweep efficiency in near-miscible regions. The goal of this research is to evaluate sweep efficiency of various gas flooding processes in a laboratory model and develop numerical tools to estimate their effectiveness in the field-scale. Quarter 5-spot experiments were conducted at reservoir pressure to evaluate the sweep efficiency of gas, WAG and foam floods. The quarter 5-spot model was used to model vapor extraction (VAPEX) experiments at the lab scale. A streamline-based compositional simulator and a commercial simulator (GEM) were used to model laboratory scale miscible floods and field-scale pattern floods. An equimolar mixture of NGL and lean gas is multicontact miscible with oil A at 1500 psi; ethane is a multicontact miscible solvent for oil B at pressures higher than 607 psi. WAG improves the microscopic displacement efficiency over continuous gas injection followed by waterflood in corefloods. WAG improves the oil recovery in the quarter 5-spot over the continuous gas injection followed by waterflood. As the WAG ratio increases from 1:2 to 2:1, the sweep efficiency in the 5-spot increases, from 39.6% to 65.9%. A decrease in the solvent amount lowers the oil recovery in WAG floods, but significantly higher amount of oil can be recovered with just 0.1 PV solvent injection over just waterflood. Use of a horizontal production well lowers the oil recovery over the vertical production well during WAG injection phase in this homogeneous 5-spot model. Estimated sweep efficiency decreases from 61.5% to 50.5%. In foam floods, as surfactant to gas slug size ratio increases from 1:10 to 1:1, oil recovery increases. In continuous gasflood VAPEX processes, as the distance between the injection well and production well decreases, the oil recovery and rate decreases in continuous gasflood VAPEX processes. Gravity override is observed for gas injection simulations in vertical (X-Z) cross-sections and 3-D quarter five spot patterns. Breakthrough recovery efficiency increases with the viscous-to-gravity ratio in the range of 1-100. The speed up for the streamline calculations alone is almost linear with the number of processors. The overall speed up factor is sub-linear because of the overhead time spent on the finite-difference calculation, inter-processor communication, and non-uniform processor load. Field-scale pattern simulations showed that recovery from gas and WAG floods depends on the vertical position of high permeability regions and k{sub v}/k{sub h} ratio. As the location of high permeability region moves down and k{sub v}/k{sub h} ratio decreases, oil recovery increases. There is less gravity override. The recovery from the field model is lower than that from the lab 5-spot model, but the effect of WAG ratio is similar.

  2. Design and Analysis of Digitally Modulated Transmitters for Efficiency Enhancement

    E-Print Network [OSTI]

    YE, LU

    2013-01-01T23:59:59.000Z

    Measured efficient improvements with drain impedance11]. . . . . . . . . . . . . . . . Efficiency enhancementand drain efficiency versus frequency. . . . . . . . . . .

  3. Considerations for efficient airflow design in cleanrooms

    SciTech Connect (OSTI)

    Xu, Tengfang

    2004-07-29T23:59:59.000Z

    A high-performance cleanroom should provide efficient energy performance in addition to effective contamination control. Energy-efficient designs can yield capital and operational cost savings, and can be part of a strategy to improve productivity in the cleanroom industry. Based upon in-situ measurement data from ISO Class 5 clean rooms, this article discusses key factors affecting cleanroom air system performance and benefits of efficient airflow design in clean rooms. Cleanroom HVAC systems used in the semiconductor, pharmaceutical, and healthcare industries are very energy intensive, requiring large volumes of cleaned air to remove or dilute contaminants for satisfactory operations. There is a tendency, however, to design excessive airflow rates into cleanroom HVAC systems, due to factors such as design conservatism, lack of thorough understanding of airflow requirements, concerns about cleanliness reliability, and potential design and operational liabilities. Energy use of cleanroom environmental systems varies with system type and design, cleanroom functions, and the control of critical parameters such as temperature and humidity. In particular, cleanroom cleanliness requirements specified by cleanliness class have an impact on overall energy use. A previous study covering Europe and the US reveals annual cleanroom electricity usage for cooling and fan energy varies significantly depending on cleanliness class, and may account for up to three-quarters of total annual operating costs. A study on a semiconductor cleanroom in Japan found air delivery systems account for more than 30% of total power consumption. It is evident that the main factors dictating cleanroom operation energy include airflow rates and HVAC system efficiency. Improving energy efficiency in clean rooms may potentially contribute to significant savings in the initial costs of the facilities as well as operation and maintenance costs. For example, energy consumption by a typical chip manufacturer can be cut 40% or more, and the associated greenhouse emissions even more. Cleanroom HVAC systems provide huge opportunities for energy savings in the semiconductor industry. In addition to direct cost reductions in cleanroom investment and operation, energy-efficient designs can reduce maintenance costs, increase power reliability, improve time-to-market in cleanroom production, and improve environmental quality. Companies that use energy efficiency to lower costs and increase productivity can gain a competitive advantage and achieve a higher return on investment. In addition, energy-efficient cleanroom systems conserve energy and natural resources, heightening the company's reputation as an environmentally conscious leader in the community and the industry. A significant portion of energy use in cleanroom environmental systems is associated with recirculating air systems. We will review and analyze design factors and operational performance of airflow systems in ISO Class 5 clean rooms. We will also discuss benefits of efficient cleanroom airflow designs in conjunction with effective cleanroom contamination control. We will consider the following common recirculating air system designs: fan-tower (FT) with pressurized-plenum; distributed air handler unit (AHU); and fan-filter unit (FFU).

  4. affects higher education: Topics by E-print Network

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

    Mathematics Websites Summary: Application for Higher Education Internship Name: Address: City: Zip Code: Country: Phone Number: E supervising faculty? Name: E-mail: Phone Number:...

  5. Sandia National Laboratories: higher-performance spar cap

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

    higher-performance spar cap Sandia Participated in AMII to Support American-Made Wind-Turbine Blades On December 3, 2014, in Computational Modeling & Simulation, Energy, Materials...

  6. Elucidating the Higher Stability of Vanadium (V) Cations in Mixed...

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

    Elucidating the Higher Stability of Vanadium (V) Cations in Mixed Acid Based Redox Flow Battery Electrolytes. Abstract: The Vanadium (V) cation structures in mixed acid based...

  7. Developing a Lower Cost and Higher Energy Density Alternative...

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

    Protected Lithium Electrodes for Advanced Batteries ADVANCED MANUFACTURING OFFICE Developing a Lower Cost and Higher Energy Density Alternative to Lithium-Ion Batteries...

  8. Flato-Fronsdal theorem for higher-order singletons

    E-Print Network [OSTI]

    Thomas Basile; Xavier Bekaert; Nicolas Boulanger

    2014-10-28T23:59:59.000Z

    We prove a generalised Flato-Fronsdal theorem for higher-order, scalar and spinor, singletons. In the resulting infinite tower of bulk higher-spin fields, we point out the occurrence of partially-massless fields of all depths. This leads us to conjecture a holographic duality between a higher-spin gravity theory around $AdS_{d+1}$ with the aforementioned spectrum of fields, and a free $CFT_d$ of fundamental (higher-order) scalar and spinor singletons. As a first check of this conjecture, we find that the total Casimir energy vanishes at one loop.

  9. Excitons, biexcitons, and higher-order correlations: Direct observatio...

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

    nelson abstract: Much is known about the ultrafast dynamics of excitons in semiconductors and organic molecular systems. Far less is understood about higher-order...

  10. Bandgap Engineering in High-Efficiency Multijunction Concentrator Cells

    SciTech Connect (OSTI)

    King, R. R.; Sherif, R. A.; Kinsey, G. S.; Kurtz, S.; Fetzer, C. M.; Edmondson, K. M.; Law, D. C.; Cotal, H. L.; Krut, D. D.; Ermer, J. H.; Karam, N. H.

    2005-08-01T23:59:59.000Z

    This paper discusses semiconductor device research paths under investigation with the aim of reaching the milestone efficiency of 40%. A cost analysis shows that achieving very high cell efficiencies is crucial for the realization of cost-effective photovoltaics, because of the strongly leveraging effect of efficiency on module packaging and balance-of systems costs. Lattice-matched (LM) GaInP/ GaInAs/ Ge 3-junction cells have achieved the highest independently confirmed efficiency at 175 suns, 25?C, of 37.3% under the standard AM1.5D, low-AOD terrestrial spectrum. Lattice-mismatched, or metamorphic (MM), materials offer still higher potential efficiencies, if the crystal quality can be maintained. Theoretical efficiencies well over 50% are possible for a MM GaInP/ 1.17-eV GaInAs/ Ge 3-junction cell limited by radiative recombination at 500 suns. The bandgap - open circuit voltage offset, (Eg/q) - Voc, is used as a valuable theoretical and experimental tool to characterize multijunction cells with subcell bandgaps ranging from 0.7 to 2.1 eV. Experimental results are presented for prototype 6-junction cells employing an active {approx}1.1-eV dilute nitride GaInNAs subcell, with active-area efficiency greater than 23% and over 5.3 V open-circuit voltage under the 1-sun AM0 space spectrum. Such cell designs have theoretical efficiencies under the terrestrial spectrum at 500 suns concentration exceeding 55% efficiency, even for lattice-matched designs.

  11. Improving Gas Flooding Efficiency

    SciTech Connect (OSTI)

    Reid Grigg; Robert Svec; Zheng Zeng; Alexander Mikhalin; Yi Lin; Guoqiang Yin; Solomon Ampir; Rashid Kassim

    2008-03-31T23:59:59.000Z

    This study focuses on laboratory studies with related analytical and numerical models, as well as work with operators for field tests to enhance our understanding of and capabilities for more efficient enhanced oil recovery (EOR). Much of the work has been performed at reservoir conditions. This includes a bubble chamber and several core flood apparatus developed or modified to measure interfacial tension (IFT), critical micelle concentration (CMC), foam durability, surfactant sorption at reservoir conditions, and pressure and temperature effects on foam systems.Carbon dioxide and N{sub 2} systems have been considered, under both miscible and immiscible conditions. The injection of CO2 into brine-saturated sandstone and carbonate core results in brine saturation reduction in the range of 62 to 82% brine in the tests presented in this paper. In each test, over 90% of the reduction occurred with less than 0.5 PV of CO{sub 2} injected, with very little additional brine production after 0.5 PV of CO{sub 2} injected. Adsorption of all considered surfactant is a significant problem. Most of the effect is reversible, but the amount required for foaming is large in terms of volume and cost for all considered surfactants. Some foams increase resistance to the value beyond what is practical in the reservoir. Sandstone, limestone, and dolomite core samples were tested. Dissolution of reservoir rock and/or cement, especially carbonates, under acid conditions of CO2 injection is a potential problem in CO2 injection into geological formations. Another potential change in reservoir injectivity and productivity will be the precipitation of dissolved carbonates as the brine flows and pressure decreases. The results of this report provide methods for determining surfactant sorption and can be used to aid in the determination of surfactant requirements for reservoir use in a CO{sub 2}-foam flood for mobility control. It also provides data to be used to determine rock permeability changes during CO{sub 2} flooding due to saturation changes, dissolution, and precipitation.

  12. The Effects of Fuel Composition and Compression Ratio on Thermal Efficiency in an HCCI Engine

    SciTech Connect (OSTI)

    Szybist, James P [ORNL; Bunting, Bruce G [ORNL

    2007-01-01T23:59:59.000Z

    The effects of variable compression ratio (CR) and fuel composition on thermal efficiency were investigated in a homogeneous charge compression ignition (HCCI) engine using blends of n-heptane and toluene with research octane numbers (RON) of 0 to 88. Experiments were conducted by performing CR sweeps at multiple intake temperatures using both unthrottled operation, and constant equivalence ratio conditions by throttling to compensate for varying air density. It was found that CR is effective at changing and controlling HCCI combustion phasing midpoint, denoted here as CA 50. Thermal efficiency was a strong function of CA 50, with overly advanced CA 50 leading to efficiency decreases. Increases in CR at a constant CA 50 for a given fuel composition did, in most cases, increase efficiency, but the relationship was weaker than the dependence of efficiency on CA 50. The increase in efficiency with higher CR was fuel-dependent, so that the fuels requiring a higher CR to achieve ignition did not gain a proportionate efficiency increase. For example, n-heptane achieved an indicated thermal efficiency (ITE) of 38% at a CR of 9:1, whereas a 50 wt% blend of toluene with n-heptane required a CR of 12:1 to achieve the same ITE. A simple heat balance around the engine showed that higher toluene content fuels had higher cooling losses. The high toluene fuels exhibited higher rates of maximum pressure rise than the lower octane fuels. The increased cooling losses can be attributed to the higher pressure rise rates, which are a driving force for heat transfer.

  13. STATE OF COLORADO DEPARTMENT OF HIGHER EDUCATION John Hickenlooper

    E-Print Network [OSTI]

    STATE OF COLORADO DEPARTMENT OF HIGHER EDUCATION John Hickenlooper Governor Lt. Gov. Joseph A OF HIGHER EDUCATION Colorado State University-Ft Collins #12;FINAL Statewide Transfer Articulation Agreement Education. The guarantees and limitations below describe the minimum requirements to which all participating

  14. Terrace housing : providing quality in higher-density housing

    E-Print Network [OSTI]

    Atthakor, Songpol

    1992-01-01T23:59:59.000Z

    The higher demand of higher-density housing in Bangkok due to the rapid growth of the economy and the use of high-performance materials and modern construction methods has changed the forms of housing from low-rise buildings ...

  15. Termination and Reduction Checking for HigherOrder Logic Programs

    E-Print Network [OSTI]

    Pientka, Brigitte

    Termination and Reduction Checking for Higher­Order Logic Programs Brigitte Pientka Department, we present a syntax­directed termination and reduction checker for higher­order logic programs and output of well­moded predicates. These reduction con­ straints are exploited during termination checking

  16. Termination and Reduction Checking for Higher-Order Logic Programs

    E-Print Network [OSTI]

    Pientka, Brigitte

    Termination and Reduction Checking for Higher-Order Logic Programs Brigitte Pientka Department, we present a syntax-directed termination and reduction checker for higher-order logic programs and output of well-moded predicates. These reduction con- straints are exploited during termination checking

  17. Metrics and Benchmarks for Energy Efficiency in Laboratories

    SciTech Connect (OSTI)

    Mathew, Paul

    2007-10-26T23:59:59.000Z

    A wide spectrum of laboratory owners, ranging from universities to federal agencies, have explicit goals for energy efficiency in their facilities. For example, the Energy Policy Act of 2005 (EPACT 2005) requires all new federal buildings to exceed ASHRAE 90.1-2004 1 by at least 30 percent. The University of California Regents Policy requires all new construction to exceed California Title 24 2 by at least 20 percent. A new laboratory is much more likely to meet energy efficiency goals if quantitative metrics and targets are explicitly specified in programming documents and tracked during the course of the delivery process. If efficiency targets are not explicitly and properly defined, any additional capital costs or design time associated with attaining higher efficiencies can be difficult to justify. The purpose of this guide is to provide guidance on how to specify and compute energy efficiency metrics and benchmarks for laboratories, at the whole building as well as the system level. The information in this guide can be used to incorporate quantitative metrics and targets into the programming of new laboratory facilities. Many of these metrics can also be applied to evaluate existing facilities. For information on strategies and technologies to achieve energy efficiency, the reader is referred to Labs21 resources, including technology best practice guides, case studies, and the design guide (available at www.labs21century.gov/toolkit).

  18. Higher Spin Currents in Wolf Space: Part III

    E-Print Network [OSTI]

    Changhyun Ahn

    2015-04-01T23:59:59.000Z

    The large N=4 linear superconformal algebra (generated by four spin-1/2 currents, seven spin-1 currents, four spin-3/2 currents and one spin-2 current) found by Sevrin, Troost and Van Proeyen (and other groups) was realized in the N=4 superconformal coset SU(5)/SU(3) theory previously. The lowest 16 higher spin currents of spins (1, 3/2, 3/2, 2), (3/2, 2, 2, 5/2), (3/2, 2, 2, 5/2) and (2, 5/2, 5/2, 3) are obtained by starting with the operator product expansions (OPEs) between the four spin-3/2 currents from the above large N=4 linear superconformal algebra and the lowest higher spin-1 current which is the same as the one in the Wolf space coset SU(5)/[SU(3) x SU(2) x U(1)] theory. These OPEs determine the four higher spin-3/2 currents and the next six higher spin-2 currents are obtained from the OPEs between the above four spin-3/2 currents associated with the N=4 supersymmetry and these four higher spin-3/2 currents. The four higher spin-5/2 currents can be determined by calculating the OPEs between the above four spin-3/2 currents and the higher spin-2 currents. Similarly, the higher spin-3 current is obtained from the OPEs between the four spin-3/2 currents and the higher spin-5/2 currents. The explicit relations between the above 16 higher spin currents and the corresponding 16 higher spin currents which were found in the extension of large N=4 nonlinear superconformal algebra previously are given. By examining the OPEs between the 16 currents from the large N=4 linear superconformal algebra and the 16 higher spin currents, the match with the findings of Beccaria, Candu and Gaberdiel is also given. The next 16 higher spin currents of spins (2, 5/2, 5/2, 3), (5/2, 3, 3, 7/2), (5/2, 3, 3, 7/2) and (3, 7/2, 7/2, 4) occur from the OPEs between the above lowest 16 higher spin currents.

  19. High efficiency carbonate fuel cell/turbine hybrid power cycle

    SciTech Connect (OSTI)

    Steinfeld, G.; Maru, H.C. [Energy Research Corp., Danbury, CT (United States); Sanderson, R.A. [Sanderson (Robert) and Associates, Wethersfield, CT (United States)

    1996-07-01T23:59:59.000Z

    The hybrid power cycle studies were conducted to identify a high efficiency, economically competitive system. A hybrid power cycle which generates power at an LHV efficiency > 70% was identified that includes an atmospheric pressure direct carbonate fuel cell, a gas turbine, and a steam cycle. In this cycle, natural gas fuel is mixed with recycled fuel cell anode exhaust, providing water for reforming fuel. The mixed gas then flows to a direct carbonate fuel cell which generates about 70% of the power. The portion of the anode exhaust which is not recycled is burned and heat transferred through a heat exchanger (HX) to the compressed air from a gas turbine. The heated compressed air is then heated further in the gas turbine burner and expands through the turbine generating 15% of the power. Half the exhaust from the turbine provides air for the anode exhaust burner. All of the turbine exhaust eventually flows through the fuel cell cathodes providing the O2 and CO2 needed in the electrochemical reaction. Exhaust from the cathodes flows to a steam system (heat recovery steam generator, staged steam turbine generating 15% of the cycle power). Simulation of a 200 MW plant with a hybrid power cycle had an LHV efficiency of 72.6%. Power output and efficiency are insensitive to ambient temperature, compared to a gas turbine combined cycle; NOx emissions are 75% lower. Estimated cost of electricity for 200 MW is 46 mills/kWh, which is competitive with combined cycle where fuel cost is > $5.8/MMBTU. Key requirement is HX; in the 200 MW plant studies, a HX operating at 1094 C using high temperature HX technology currently under development by METC for coal gassifiers was assumed. A study of a near term (20 MW) high efficiency direct carbonate fuel cell/turbine hybrid power cycle has also been completed.

  20. Energy Efficiency Fund (Electric and Gas)- Residential Energy Efficiency Financing

    Broader source: Energy.gov [DOE]

    Connecticut homeowners and customers of Connecticut Light and Power Company (CL&P), and United Illuminating Company (UI) may apply for up to 100% financing for eligible energy efficiency...

  1. The efficiency and eco-efficiency of manufacturing

    E-Print Network [OSTI]

    Gutowski, Timothy G.

    2010-01-01T23:59:59.000Z

    In this paper, we review the efficiency of both manufacturing processes and systems over recent decades and compare nano-materials technologies in this context. To a first approximation, nano-materials processes appear to ...

  2. Energy Efficiency Services Sector: Workforce Size and Expectations for Growth

    E-Print Network [OSTI]

    Goldman, Charles

    2010-01-01T23:59:59.000Z

    Clean Energy Fund Job Type Green Jobs (direct) Energy Efficiency Energy Efficiency (efficiency premium) Energy Efficiency (direct) Energy Efficiency Total Investment (

  3. The Value Proposition of Industrial Energy Efficiency Programs 

    E-Print Network [OSTI]

    Rogers, E.

    2015-01-01T23:59:59.000Z

    therefore have a very difficult task in convincing businesses to participate in their programs. And yet lack of business sector participation in utility sector efficiency programs has been proven to result in higher energy prices for all customer...’ energy waste and thereby reduce monthly energy expenses. (2) Programs reduce customer demand, or load, which lowers wholesale energy prices, particularly in the short and medium term. (3) Programs increase the volume of resources bid...

  4. Energy Efficiency and Pollution Prevention: Industrial Efficiency Strategies

    E-Print Network [OSTI]

    Pye, M.; Elliott, R. N.

    . Beginning in the late 1980s, some in the industrial energy efficiency arena recognized that significant energy savings could be realized from P2 programs. Notable program examples are EPRI's (Electric Power Research Institute)2 Partnership... for Industrial Competitiveness program, and DOE's Industrial Assessment Center (lAC) program. EPRI's Partnership for Industrial Competitiveness (EPIC) program focuses on maximizing energy efficiency, pollution prevention and industrial competitiveness...

  5. Orthogonal Polynomial Approximation in Higher Dimensions: Applications in Astrodynamics

    E-Print Network [OSTI]

    Bani Younes, Ahmad H.

    2013-08-05T23:59:59.000Z

    harmonic series by a family of locally precise orthogonal polynomial approximations for efficient computation. A method is introduced which adapts the approximation degree radially, compatible with the truth that the highest degree approximations (to...

  6. Broadband Quantum Efficiency Enhancement in High Index Nanowires Resonators

    E-Print Network [OSTI]

    Yang, Yiming; Hyatt, Steven; Yu, Dong

    2015-01-01T23:59:59.000Z

    Light trapping in sub-wavelength semiconductor nanowires (NWs) offers a promising approach to simultaneously reducing material consumption and enhancing photovoltaic performance. Nevertheless, the absorption efficiency of a NW, defined by the ratio of optical absorption cross section to the NW diameter, lingers around 1 in existing NW photonic devices, and the absorption enhancement suffers from a narrow spectral width. Here, we show that the absorption efficiency can be significantly improved in NWs with higher refractive indices, by an experimental observation of up to 350% external quantum efficiency (EQE) in lead sulfide (PbS) NW resonators, a 3-fold increase compared to Si NWs. Furthermore, broadband absorption enhancement is achieved in single tapered NWs, where light of various wavelengths is absorbed at segments with different diameters analogous to a tandem solar cell. Overall, the single NW Schottky junction solar cells benefit from optical resonance, near bandgap open circuit voltage, and long mino...

  7. Highly efficient light management for perovskite solar cells

    E-Print Network [OSTI]

    Wang, Dong-Lin; Hou, Guo-Jiao; Zhu, Zhen-Gang; Yan, Qing-Bo; Su, Gang

    2015-01-01T23:59:59.000Z

    Organic-inorganic halide perovskite solar cells have enormous potential to impact the existing photovoltaic industry. As realizing a higher conversion efficiency of the solar cell is still the most crucial task, a great number of schemes were proposed to minimize the carrier loss by optimizing the electrical properties of the perovskite solar cells. Here, we focus on another significant aspect that is to minimize the light loss by optimizing the light management to gain a high efficiency for perovskite solar cells. In our scheme, the slotted and inverted prism structured SiO2 layers are adopted to trap more light into the solar cells, and a better transparent conducting oxide layer is employed to reduce the parasitic absorption. For such an implementation, the efficiency and the serviceable angle of the perovskite solar cell can be promoted impressively. This proposal would shed new light on developing the high-performance perovskite solar cells.

  8. The Value of End-Use Energy Efficiency in Mitigation of U.S. Carbon Emissions

    SciTech Connect (OSTI)

    Kyle, G. Page; Smith, Steven J.; Clarke, Leon E.; Kim, Son H.; Wise, Marshall A.

    2007-11-27T23:59:59.000Z

    This report documents a scenario analysis exploring the value of advanced technologies in the U.S. buildings, industrial, and transportation sectors in stabilizing atmospheric greenhouse gas concentrations. The analysis was conducted by staff members of Pacific Northwest National Laboratory (PNNL), working at the Joint Global Change Research Institute (JGCRI) in support of the strategic planning process of the U.S. Department of Energy (U.S. DOE) Office of Energy Efficiency and Renewable Energy (EERE). The conceptual framework for the analysis is an integration of detailed buildings, industrial, and transportation modules into MiniCAM, a global integrated assessment model. The analysis is based on three technology scenarios, which differ in their assumed rates of deployment of new or presently available energy-saving technologies in the end-use sectors. These technology scenarios are explored with no carbon policy, and under two CO2 stabilization policies, in which an economic price on carbon is applied such that emissions follow prescribed trajectories leading to long-term stabilization of CO2 at roughly 450 and 550 parts per million by volume (ppmv). The costs of meeting the emissions targets prescribed by these policies are examined, and compared between technology scenarios. Relative to the reference technology scenario, advanced technologies in all three sectors reduce costs by 50% and 85% for the 450 and 550 ppmv policies, respectively. The 450 ppmv policy is more stringent and imposes higher costs than the 550 ppmv policy; as a result, the magnitude of the economic value of energy efficiency is four times greater for the 450 ppmv policy than the 550 ppmv policy. While they substantially reduce the costs of meeting emissions requirements, advanced end-use technologies do not lead to greenhouse gas stabilization without a carbon policy. This is due mostly to the effects of increasing service demands over time, the high consumption of fossil fuels in the electricity sector, and the use of unconventional feedstocks in the liquid fuel refining sector. Of the three end-use sectors, advanced transportation technologies have the greatest potential to reduce costs of meeting carbon policy requirements. Services in the buildings and industrial sectors can often be supplied by technologies that consume low-emissions fuels such as biomass or, in policy cases, electricity. Passenger transportation, in contrast, is especially unresponsive to climate policies, as the fuel costs are small compared to the time value of transportation and vehicle capital and operating costs. Delaying the transition from reference to advanced technologies by 15 years increases the costs of meeting 450 ppmv stabilization emissions requirements by 21%, but the costs are still 39% lower than the costs assuming reference technology. The report provides a detailed description of the end-use technology scenarios and provides a thorough analysis of the results. Assumptions are documented in the Appendix.

  9. Citizens Gas- Commercial Efficiency Rebates

    Broader source: Energy.gov [DOE]

    Citizens Gas of Indiana offers rebates to commercial customers for the installation of several types of efficient natural gas appliances, as well as certain equipment upgrades and tune-up services....

  10. Center for Energy Efficient Design

    High Performance Buildings Database

    Rocky Mount, VA As the first Passivhaus public school in North America, the Center for Energy Efficient Design (CEED) in Rocky Mount, Virginia, is a national model for green school construction. An extension of The Leonard A.

  11. Energy Efficient Schools Initiative- Grants

    Broader source: Energy.gov [DOE]

    The Energy Efficient Schools Initiative was created in May 2008 to provide grants and [http://www.dsireusa.org/incentives/incentive.cfm?Incentive_Code=TN57F&re... loans] to Tennessee school...

  12. Energy Efficient Schools Initiative- Loans

    Broader source: Energy.gov [DOE]

    '''''Applications are now being considered on a case-by-case basis. School districts interested in applying for loans should contact Ron Graham, Executive Director of the Energy Efficient Schools...

  13. Office of Energy Efficiency & Renewable...

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

    of Energy Efficiency & Renewable Energy DOE Zero Energy Ready Home February 2015 A note from Sam Rashkin: "If you don't tell your story, you give it away." These are great words of...

  14. Efficient Use of Energy Act

    Broader source: Energy.gov [DOE]

    The Efficient Use of Energy Act of 2005 allows public electric and natural gas utilities to implement cost-effective energy-reduction programs. The programs may be funded through a tariff rider for...

  15. Operating Efficiency Comes From Teamwork

    E-Print Network [OSTI]

    Relyea, D. L.; Stone, A.

    A group of operating and planning personnel formed the INter Plant Utilities Team [INPUT] to improve energy efficiency and reliability for Exxon's Baytown, Texas, refinery and chemical plants complex. The Team coordinates the day-to-day operations...

  16. Efficiency Maine Residential Lighting Program

    Broader source: Energy.gov [DOE]

    In addition, in partnership with Maine Libraries, Efficiency Maine has made free electricity monitor loaners available for Maine residents to borrow from all of Maine’s libraries. The monitors pl...

  17. Efficiency Maine Appliance Rebate Program

    Broader source: Energy.gov [DOE]

    Efficiency Maine offers rebates for the purchase of ENERGY STAR certified room air purifiers, clothes washers, and dehumidifiers. Purchases must be made between November 1, 2014 and June 30, 2015....

  18. Energy-Efficient Commercial Technologies

    Broader source: Energy.gov [DOE]

    Presentation—given at the April 2012 Federal Utility Partnership Working Group (FUPWG) meeting—discusses energy-efficient technologies such as boilers, air conditioners, heat pumps, humidity controls, combined heat and power (CHP), and more.

  19. State Energy Efficiency Design Program

    Broader source: Energy.gov [DOE]

    Oregon's State Energy Efficiency Design Program (SEED) was originally established in 1991. This program, codified in state law, directs state agencies to work with the Oregon Department of Energy...

  20. Electrofuels: More Efficient Than Photosynthesis

    ScienceCinema (OSTI)

    Toone, Eric; Eggert, Chas; Lynch, Mike; Roberts, Bill

    2013-05-29T23:59:59.000Z

    The Advanced Research Projects Agency -- Energy (ARPA-E) has funded successful programs with OPXBIO, NC State and others to create hyper efficient processes for manufacturing biofuels and electrofuels, which can be used in the existing transportation infrastructure.

  1. Energy Efficiency Tax Credits (Corporate)

    Broader source: Energy.gov [DOE]

    In April 2008, Kentucky enacted legislation establishing a 30% state income tax credit for taxpayers that install certain energy efficiency measures on commercial property. The 30% credit (up to ...

  2. Energy Efficiency Indicators Methodology Booklet

    E-Print Network [OSTI]

    Sathaye, Jayant

    2010-01-01T23:59:59.000Z

    specific energy consumption targets, to evaluate trends andexplain trends in total energy consumption. The developmentenergy consumption by efficiency class. This type of analysis allowed an assessment of the implied technology trends

  3. Highly Efficient Coherent Raman Generation 

    E-Print Network [OSTI]

    Hua, Xia

    2014-08-04T23:59:59.000Z

    explore detection and sensing applications, and achieve further improvement of efficiency by using field enhancement due to surface plasmon resonances in aggregates of gold nanoparticles. By scanning the time delay of the probe pulse, we demonstrate a new...

  4. Energy Efficiency Exchange 2015 Schedule

    Broader source: Energy.gov [DOE]

    The schedule for Energy Efficiency Exchange 2015 is now available. Attendees will have the option of attending a variety of training sessions offered within 10 tracks during the times listed below....

  5. DRAFT STAFF PAPER EFFICIENCY PROGRAMS

    E-Print Network [OSTI]

    . Keywords: Efficiency, demand side management, naturally occurring savings, building and appliance ACTIVITIES INTO ENERGY COMMISSION DEMAND FORECASTS Chris Kavalec Don Schultz Demand Analysis Office. This uncertainty, along with other issues related to impact measurement, has been debated in recent Demand

  6. Options for Generating Steam Efficiently

    E-Print Network [OSTI]

    Ganapathy, V.

    This paper describes how plant engineers can efficiently generate steam when there are steam generators and Heat Recovery Steam Generators in their plant. The process consists of understanding the performance characteristics of the various equipment...

  7. Efficiency measurements of TPV cells

    SciTech Connect (OSTI)

    Broman, L.; Jarefors, K. [Solar Energy Research Center, Hoegskolan Dalarna, S-781 88 Borlaenge (Sweden); Marks, J. [Department of Operational Efficiency, Swedish University of Agricultural Sciences, Box 7060, S-750 07 Uppsala (Sweden); Wanlass, M. [National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, Colorado 80401-3393 (United States of America)

    1997-03-01T23:59:59.000Z

    An apparatus for measuring TPV cell efficiencies at different radiation intensities and for different graybody emitter temperatures has been constructed. The apparatus has been used for measuring V-I characteristics, efficiencies and fill factors for several InGaAs TPV cells. Measured results are used to determine how cells may function together with edge filters, and those results are compared with theory. {copyright} {ital 1997 American Institute of Physics.}

  8. "Imagine An Energy Efficient Campus:

    E-Print Network [OSTI]

    Imagine An Energy Efficient Campus: Benchmarking Energy Use through ENERGY STAR Are you frustrated by rising energy costs? Are your campus buildings operating efficiently? How can you benchmark your portfolio?s energy consumption? We will show... you how you can use the ENERGY STAR?s free online Portfolio Program to benchmark your buildings? energy performance across your campus. Establishing a baseline for energy use throughout your portfolio of buildings will allow you to prioritize energy...

  9. Do Solar system tests permit higher dimensional general relativity?

    E-Print Network [OSTI]

    F. Rahaman; Saibal Ray; M. Kalam; M. Sarker

    2007-07-07T23:59:59.000Z

    We perform a survey whether higher dimensional Schwarzschild space-time is compatible with some of the solar system phenomena. As a test we examine five well known solar system effects, viz., (1) Perihelion shift, (2) Bending of light, (3) Gravitational redshift, (4) Gravitational time delay and (5) Motion of test particle in the framework of general relativity with higher dimensions. It is shown that the results related to all these physical phenomena are mostly incompatible with the higher dimensional version of general relativity except that of Motion of test particle. We compare all these results with the available data in the literature.

  10. Energy Efficiency Improvement and Cost Saving Opportunities for the Pharmaceutical Industry. An ENERGY STAR Guide for Energy and Plant Managers

    E-Print Network [OSTI]

    Galitsky, Christina

    2008-01-01T23:59:59.000Z

    Characterization: Gas Turbines. Arlington, VA. February.is higher than that of a gas turbine-based CHP system (74%,electrical efficiency of a gas turbine-based CHP system is

  11. Transformer Efficiency Assessment - Okinawa, Japan

    SciTech Connect (OSTI)

    Thomas L. Baldwin; Robert J. Turk; Kurt S. Myers; Jake P. Gentle; Jason W. Bush

    2012-05-01T23:59:59.000Z

    The US Army Engineering & Support Center, Huntsville (USAESCH), and the US Marine Corps Base (MCB), Okinawa, Japan retained Idaho National Laboratory (INL) to conduct a Transformer Efficiency Assessment of “key” transformers located at multiple military bases in Okinawa, Japan. The purpose of this assessment is to support the Marine Corps Base, Okinawa in evaluating medium voltage distribution transformers for potential efficiency upgrades. The original scope of work included the MCB providing actual transformer nameplate data, manufacturer’s factory test sheets, electrical system data (kWh), demand data (kWd), power factor data, and electricity cost data. Unfortunately, the MCB’s actual data is not available and therefore making it necessary to de-scope the original assessment. Note: Any similar nameplate data, photos of similar transformer nameplates, and basic electrical details from one-line drawings (provided by MCB) are not a replacement for actual load loss test data. It is recommended that load measurements are performed on the high and low sides of transformers to better quantify actual load losses, demand data, and power factor data. We also recommend that actual data, when available, be inserted by MCB Okinawa where assumptions have been made and then the LCC analysis updated. This report covers a generalized assessment of modern U.S. transformers in a three level efficiency category, Low-Level efficiency, Medium-Level efficiency, and High-Level efficiency.

  12. Transformer Efficiency Assessment - Okinawa, Japan

    SciTech Connect (OSTI)

    Thomas L. Baldwin; Robert J. Turk; Kurt S. Myers; Jake P. Gentle; Jason W. Bush

    2012-08-01T23:59:59.000Z

    The US Army Engineering & Support Center, Huntsville (USAESCH), and the US Marine Corps Base (MCB), Okinawa, Japan retained Idaho National Laboratory (INL) to conduct a Transformer Efficiency Assessment of “key” transformers located at multiple military bases in Okinawa, Japan. The purpose of this assessment is to support the Marine Corps Base, Okinawa in evaluating medium voltage distribution transformers for potential efficiency upgrades. The original scope of work included the MCB providing actual transformer nameplate data, manufacturer’s factory test sheets, electrical system data (kWh), demand data (kWd), power factor data, and electricity cost data. Unfortunately, the MCB’s actual data is not available and therefore making it necessary to de-scope the original assessment. Note: Any similar nameplate data, photos of similar transformer nameplates, and basic electrical details from one-line drawings (provided by MCB) are not a replacement for actual load loss test data. It is recommended that load measurements are performed on the high and low sides of transformers to better quantify actual load losses, demand data, and power factor data. We also recommend that actual data, when available, be inserted by MCB Okinawa where assumptions have been made and then the LCC analysis updated. This report covers a generalized assessment of modern U.S. transformers in a three level efficiency category, Low-Level efficiency, Medium-Level efficiency, and High-Level efficiency.

  13. Melting efficiency in fusion welding

    SciTech Connect (OSTI)

    Fuerschbach, P.W.

    1991-01-01T23:59:59.000Z

    Basic to our knowledge of the science of welding is an understanding of the melting efficiency, which indicates how much of the heat deposited by the welding process is used to produce melting. Recent calorimetric studies of GTAW, PAW, and LBW processes have measured the net heat input to the part thereby quantifying the energy transfer efficiency and in turn permitting an accurate determination of the melting efficiency. It is indicated that the weld process variables can dramatically affect the melting efficiency. This limiting value is shown to depend on the weld heat flow geometry as predicted by analytical solutions to the heat flow equation and as demonstrated by the recent empirical data. A new dimensionless parameter is used to predict the melting efficiency and is shown to correlate extremely well with recent empirical data. This simple prediction methodology is notable because it requires only a knowledge of the weld schedule and the material properties in order to estimate melting efficiency. 22 refs., 16 figs.

  14. Efficiency of Local Search Johann Hurink

    E-Print Network [OSTI]

    Al Hanbali, Ahmad

    Efficiency of Local Search Johann Hurink University of Twente BETA Mini Cour Efficiency of Local Search #12;Overview of the Talk · Efficiency of local search · Scheduling problems ­ Definition for P|| wjCj BETA Mini Cour Efficiency of Local Search #12;Efficiency of Local Search -1- Basic

  15. Efficiency and maximal CP-asymmetry of scalar triplet leptogenesis

    E-Print Network [OSTI]

    Thomas Hambye; Martti Raidal; Alessandro Strumia

    2006-05-16T23:59:59.000Z

    We study thermal leptogenesis induced by decays of a scalar SU(2)_L triplet. Despite the presence of gauge interactions, unexpected features of the Boltzmann equations make the efficiency close to maximal in most of the parameter space. We derive the maximal CP asymmetry in triplet decays, assuming that it is generated by heavier sources of neutrino masses: in this case successful leptogenesis needs a triplet heavier than 2.8 10^{10} GeV and does not further restrict its couplings, allowing detectable mu --> e gamma, tau --> mu gamma rates in the context of supersymmetric models. Triplet masses down to the TeV scale are viable in presence of extra sources of CP-violation.

  16. Increased Efficiency in SI Engine with Air Replaced by Oxygen in Argon Mixture

    SciTech Connect (OSTI)

    Killingsworth, N J; Rapp, V H; Flowers, D L; Aceves, S M; Chen, J; Dibble, R

    2010-01-13T23:59:59.000Z

    Basic engine thermodynamics predicts that spark ignited engine efficiency is a function of both the compression ratio of the engine and the specific heat ratio of the working fluid. In practice the compression ratio of the engine is often limited due to knock. Both higher specific heat ratio and higher compression ratio lead to higher end gas temperatures and increase the likelihood of knock. In actual engine cycles, heat transfer losses increase at higher compression ratios and limit efficiency even when the knock limit is not reached. In this paper we investigate the role of both the compression ratio and the specific heat ratio on engine efficiency by conducting experiments comparing operation of a single-cylinder variable-compression-ratio engine with both hydrogen-air and hydrogen-oxygen-argon mixtures. For low load operation it is found that the hydrogen-oxygen-argon mixtures result in higher indicated thermal efficiencies. Peak efficiency for the hydrogen-oxygen-argon mixtures is found at compression ratio 5.5 whereas for the hydrogen-air mixture with an equivalence ratio of 0.24 the peak efficiency is found at compression ratio 13. We apply a three-zone model to help explain the effects of specific heat ratio and compression ratio on efficiency. Operation with hydrogen-oxygen-argon mixtures at low loads is more efficient because the lower compression ratio results in a substantially larger portion of the gas to reside in the adiabatic core rather than in the boundary layer and in the crevices, leading to less heat transfer and more complete combustion.

  17. Economic Impact of West Virginia Higher Education Institutions

    E-Print Network [OSTI]

    Mohaghegh, Shahab

    of the Higher Education Policy Commission and the governing board of West Virginia University. #12;i Executive (consumer sales and use, personal income, corporate net income, and business franchise) resulting from

  18. HIGHER EDUCATION OPPORTUNITY ACT REPORTING University of Delaware

    E-Print Network [OSTI]

    Firestone, Jeremy

    ;HIGHER EDUCATION OPPORTUNITY ACT REPORTING D. Policies on portable electrical appliances, smoking outages of heat). E. Use of extension cords. F. Tampering with or blocking any fire protection equipment

  19. Application of Mass Lumped Higher Order Finite Elements

    SciTech Connect (OSTI)

    Chen, J.; Strauss, H. R.; Jardin, S. C.; Park, W.; Sugiyama, L. E.; Fu., G.; Breslau, J.

    2005-11-01T23:59:59.000Z

    There are many interesting phenomena in extended-MHD such as anisotropic transport, mhd, 2-fluid effects stellarator and hot particles. Any one of them challenges numerical analysts, and researchers are seeking for higher order methods, such as higher order finite difference, higher order finite elements and hp/spectral elements. It is true that these methods give more accurate solution than their linear counterparts. However, numerically they are prohibitively expensive. Here we give a successful solution of this conflict by applying mass lumped higher order finite elements. This type of elements not only keep second/third order accuracy but also scale closely to linear elements by doing mass lumping. This is especially true for second order lump elements. Full M3D and anisotropic transport models are studied.

  20. Spherically Symmetric Considerations for a Higher Order Theory of Gravitation

    E-Print Network [OSTI]

    S. N. Pandey; B. K. Sinha

    2009-11-03T23:59:59.000Z

    A higher order theory of gravitation is considered which is obtained by modifying Einstein field equations. The Lagrange used to modify this in the form a polynomial in (scalar curvature) R. In this equation we have studied spherical symmetric metric.

  1. Trinity College Graduation Information (M.A. & Higher)

    E-Print Network [OSTI]

    Lasenby, Joan

    Trinity College Graduation Information (M.A. & Higher) Contents Congregations of the Regent House ....................................................................................................................................................... 7 #12;2 | P a g e Congregations of the Regent House Any member of Trinity College who has fulfilled

  2. Searching for higher dimensional wormholes with noncommutative geometry

    E-Print Network [OSTI]

    Farook Rahaman; P. K. F. Kuhfittig; Saibal Ray; Safiqul Islam

    2012-11-29T23:59:59.000Z

    Noncommutative geometry, an offshoot of string theory, replaces point-like structures with smeared objects and has recently been extended to higher dimensions. The purpose of this letter is to obtain wormhole solutions with this extended noncommutative geometry as a background. It is found through this investigation that wormhole solutions exist in the usual four, as well as in five dimensions, but they do not exist in higher-dimensional spacetimes.

  3. Violation of no signaling in higher order quantum measure theories

    E-Print Network [OSTI]

    Karthik S. Joshi; R. Srikanth; Urbasi Sinha

    2013-08-28T23:59:59.000Z

    More general probability sum-rules for describing interference than found in quantum mechanics (QM) were formulated by Sorkin in a hierarchy of such rules. The additivity of classical measure theory corresponds to the second sum-rule. QM violates this rule, but satisfies the third and higher sum-rules. This evokes the question of whether there are physical principles that forbid their violation. We show that under certain assumptions, violation of higher sum-rules allows for superluminal signaling.

  4. Fermion localization and flavour hierarchy in higher curvature spacetime

    E-Print Network [OSTI]

    Choudhury, Sayantan; SenGupta, Soumitra

    2015-01-01T23:59:59.000Z

    Fermion localization in a braneworld model in presence of dilaton coupled higher curvature Gauss-Bonnet bulk gravity is discussed. It is shown that the left handed fermionic modes can be localized on the visible brane due to the dilaton coupled higher curvature term without the necessity of any external localizing bulk field. This offers a natural resolution of the flavour hierarchy problem in Standard Model.

  5. High Efficiency Colloidal Quantum Dot Phosphors

    SciTech Connect (OSTI)

    Kahen, Keith

    2013-12-31T23:59:59.000Z

    The project showed that non-Cd containing, InP-based nanocrystals (semiconductor materials with dimensions of ~6 nm) have high potential for enabling next-generation, nanocrystal-based, on chip phosphors for solid state lighting. Typical nanocrystals fall short of the requirements for on chip phosphors due to their loss of quantum efficiency under the operating conditions of LEDs, such as, high temperature (up to 150 °C) and high optical flux (up to 200 W/cm2). The InP-based nanocrystals invented during this project maintain high quantum efficiency (>80%) in polymer-based films under these operating conditions for emission wavelengths ranging from ~530 to 620 nm. These nanocrystals also show other desirable attributes, such as, lack of blinking (a common problem with nanocrystals which limits their performance) and no increase in the emission spectral width from room to 150 °C (emitters with narrower spectral widths enable higher efficiency LEDs). Prior to these nanocrystals, no nanocrystal system (regardless of nanocrystal type) showed this collection of properties; in fact, other nanocrystal systems are typically limited to showing only one desirable trait (such as high temperature stability) but being deficient in other properties (such as high flux stability). The project showed that one can reproducibly obtain these properties by generating a novel compositional structure inside of the nanomaterials; in addition, the project formulated an initial theoretical framework linking the compositional structure to the list of high performance optical properties. Over the course of the project, the synthetic methodology for producing the novel composition was evolved to enable the synthesis of these nanomaterials at a cost approximately equal to that required for forming typical conventional nanocrystals. Given the above results, the last major remaining step prior to scale up of the nanomaterials is to limit the oxidation of these materials during the tens of thousands of hours of LED operation. Once the LED phosphor lifetime specifications are met, these nanocrystals will enable white LEDs for solid state lighting to simultaneously have increased efficiency and improved light quality, in addition to enabling the creation of custom light spectrums. These improvements to white LEDs will help accelerate the adoption of SSL, leading to large savings in US and worldwide energy costs.

  6. Higher Spin Currents in Wolf Space: Part III

    E-Print Network [OSTI]

    Ahn, Changhyun

    2015-01-01T23:59:59.000Z

    The large N=4 linear superconformal algebra (generated by four spin-1/2 currents, seven spin-1 currents, four spin-3/2 currents and one spin-2 current) found by Sevrin, Troost and Van Proeyen (and other groups) was realized in the N=4 superconformal coset SU(5)/SU(3) theory previously. The lowest 16 higher spin currents of spins (1, 3/2, 3/2, 2), (3/2, 2, 2, 5/2), (3/2, 2, 2, 5/2) and (2, 5/2, 5/2, 3) are obtained by starting with the operator product expansions (OPEs) between the four spin-3/2 currents from the above large N=4 linear superconformal algebra and the lowest higher spin-1 current which is the same as the one in the Wolf space coset SU(5)/[SU(3) x SU(2) x U(1)] theory. These OPEs determine the four higher spin-3/2 currents and the next six higher spin-2 currents are obtained from the OPEs between the above four spin-3/2 currents associated with the N=4 supersymmetry and these four higher spin-3/2 currents. The four higher spin-5/2 currents can be determined by calculating the OPEs between the abo...

  7. Setting the Standard for Industrial Energy Efficiency

    E-Print Network [OSTI]

    McKane, Aimee; Williams, Robert; Perry, Wayne; Li, Tienan

    2008-01-01T23:59:59.000Z

    Voluntary Agreements for Energy Efficiency or GHG EmissionsACEEE Summer Study on Energy Efficiency in Industry, WestStandard for Industrial Energy Efficiency A. McKane 1 , R.

  8. RADON DAUGHTER EXPOSURES IN ENERGY EFFICIENT BUILDINGS

    E-Print Network [OSTI]

    Nero, A.V.

    2010-01-01T23:59:59.000Z

    DAUGHTER EXPOSURES IN ENERGY-EFFICIENT BUILDINGS A.V. Nero,DAUGHTER EXPOSURES IN ENERGY-EFFICIENT BUILDINGS A.V. Nero,vs. VENTILATION IN ENERGY EFFICIENT HOUSES Air change rate(

  9. Industrial Energy Efficiency Programs: Development and Trends

    E-Print Network [OSTI]

    Chittum, A.; Kaufman, N.; Elliot, N.

    2010-01-01T23:59:59.000Z

    As more states establish Energy Efficiency Resource Standards (EERS), goals for energy efficiency savings are increasing across the country. Increasingly, states are relying on their industrial energy efficiency programs to find and help implement...

  10. Healthcare Energy Efficiency Research and Development

    E-Print Network [OSTI]

    Lanzisera,, Judy Lai, Steven M.

    2012-01-01T23:59:59.000Z

    of panels. Steam boiler efficiency Electrical includedto BTU equivalents. Boiler efficiency can be monitored as aGenerators Heating water boiler efficiency kBtu out/ kBtu in

  11. Efficiency loss in resource allocation games

    E-Print Network [OSTI]

    Xu, Yunjian

    2012-01-01T23:59:59.000Z

    The overarching goals of this thesis are to quantify the efficiency loss due to market participant strategic behavior, and to design proper pricing mechanisms that reduce the efficiency loss. The concept of efficiency loss ...

  12. Northwest Energy Efficiency Taskforce Executive Committee

    E-Print Network [OSTI]

    #12;Northwest Energy Efficiency Taskforce Executive Committee Chairs Tom Karier, Washington Member, Northwest Energy Efficiency Alliance Bill Gaines, Director/Chief Executive Officer, Tacoma Public Utilities, Cowlitz County Public Utility District Cal Shirley, Vice President for Energy Efficiency Service, Puget

  13. Dynamic workload characterization for energy efficient computing

    E-Print Network [OSTI]

    Dhiman, Gaurav

    2011-01-01T23:59:59.000Z

    environments, energy efficient design is key to reduction ofreasons have made energy efficient design an active area ofDesign, 2006. xvi ABSTRACT OF THE DISSERTATION Dynamic Workload Characterization for Energy Efficient

  14. Information efficiency in hyperspectral imaging systems

    E-Print Network [OSTI]

    Reichenbach, Stephen E.

    Information efficiency in hyperspectral imaging systems Stephen E. Reichenbach University develop a method for assessing the in- formation density and efficiency of hyperspectral imaging systems width can efficiently gather information about a scene by allocating bandwidth among the bands according

  15. Fort Collins Utilities- Home Efficiency Program

    Broader source: Energy.gov [DOE]

    Fort Collins Utilities (FCU) provides rebates for customers living in existing single-family homes who pursue energy efficiency projects. Either the Efficiency Audit or Efficiency Audit Plus is a...

  16. Industrial Energy Efficiency Programs: Development and Trends 

    E-Print Network [OSTI]

    Chittum, A.; Kaufman, N.; Elliot, N.

    2010-01-01T23:59:59.000Z

    As more states establish Energy Efficiency Resource Standards (EERS), goals for energy efficiency savings are increasing across the country. Increasingly, states are relying on their industrial energy efficiency programs ...

  17. Zeaxanthin Radical Cation Formation in Minor Light-Harvesting Complexes of Higher Plant Antenna

    SciTech Connect (OSTI)

    Avenson, Thomas H.; Ahn, Tae Kyu; Zigmantas, Donatas; Niyogi, Krishna K.; Li, Zhirong; Ballottari, Matteo; Bassi, Roberto; Fleming, Graham R.

    2008-01-31T23:59:59.000Z

    Previous work on intact thylakoid membranes showed that transient formation of a zeaxanthin radical cation was correlated with regulation of photosynthetic light-harvesting via energy-dependent quenching. A molecular mechanism for such quenching was proposed to involve charge transfer within a chlorophyll-zeaxanthin heterodimer. Using near infrared (880-1100 nm) transient absorption spectroscopy, we demonstrate that carotenoid (mainly zeaxanthin) radical cation generation occurs solely in isolated minor light-harvesting complexes that bind zeaxanthin, consistent with the engagement of charge transfer quenching therein. We estimated that less than 0.5percent of the isolated minor complexes undergo charge transfer quenching in vitro, whereas the fraction of minor complexes estimated to be engaged in charge transfer quenching in isolated thylakoids was more than 80 times higher. We conclude that minor complexes which bind zeaxanthin are sites of charge transfer quenching in vivo and that they can assume Non-quenching and Quenching conformations, the equilibrium LHC(N)<--> LHC(Q) of which is modulated by the transthylakoid pH gradient, the PsbS protein, and protein-protein interactions.

  18. Ultra-Compact High-Efficiency Luminaire for General Illumination

    SciTech Connect (OSTI)

    Ted Lowes

    2012-04-08T23:59:59.000Z

    Cree has developed a new ultra-compact light emitting diode (LED) luminaire capable of providing high efficacy with excellent color quality that can lead to significant energy savings in todayâ??s commercial and retail applications. This success was based on an integrated development effort tailoring the LED component characteristics, optics, thermal management and driver design for the small footprint to achieve an overall system efficiency of â?¥ 70%. A new LED component was designed to provide high brightness and efficacy in a form factor that allowed for a small directional beam with a luminaire housing design able to dissipate the heat effectively using a small physical envelope. A very compact, 90% efficient driver was developed to meet the system performance while not taking away any thermal mass from the heat sink. A 91% efficient secondary optics was designed to maximize efficiency while providing a smooth beam. The reliability of the new LED component was robust under accelerated testing conditions. Luminaires were assembled integrating the novel LED component, secondary optics, heat sink and driver technology to demonstrate the system improvement. Cree has successfully completed this project by developing an ultra-compact LED luminaire that provided 380 lumens at a correlated color temperature (CCT) of 2822 K and color rendering index (CRI) of 94 with an efficacy of 94 lumens per watt (LPW) when operating at 4 W input power (steady state) with an overall system efficiency of 81%. At a higher input power of 9 Watts, the lamp provided 658 lumens at 71 LPW.

  19. Scalable Routes to Efficient Thermoelectric Materials

    E-Print Network [OSTI]

    Feser, Joseph Patrick

    2010-01-01T23:59:59.000Z

    A High-Efficiency Solution-Deposited Thin-Film PhotovoltaicGunawan, "12% Efficiency CuIn(Se,S)(2) Photovoltaic Device

  20. Water Efficiency Improvements at Various Environmental Protection...

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

    Water Efficiency Improvements at Various Environmental Protection Agency Sites: Best Management Practices Case Study 12-LaboratoryMedical Equipment Water Efficiency Improvements...

  1. AN EFFICIENT AND ACCURATE SPECTRAL METHOD FOR ...

    E-Print Network [OSTI]

    2009-01-20T23:59:59.000Z

    Abstract. An efficient and accurate method for solving the two-dimensional Helmholtz ... has proven to be very efficient for obstacles that can be considered as a ...

  2. Building America Residential Energy Efficiency Stakeholders Meeting...

    Energy Savers [EERE]

    Energy Efficiency Stakeholders Meeting: March 2011 Building America Residential Energy Efficiency Stakeholders Meeting: March 2011 On this page, you may link to the summary report...

  3. Building America Residential Energy Efficiency Technical Update...

    Energy Savers [EERE]

    Residential Energy Efficiency Technical Update Meeting: August 2011 Building America Residential Energy Efficiency Technical Update Meeting: August 2011 On this page, you may link...

  4. Building America Residential Energy Efficiency Research Planning...

    Energy Savers [EERE]

    Building America Residential Energy Efficiency Research Planning Meeting: October 2011 Building America Residential Energy Efficiency Research Planning Meeting: October 2011 On...

  5. Industrial Energy Efficiency Projects Improve Competitiveness...

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

    Energy Efficiency Projects Improve Competitiveness and Protect Jobs Industrial Energy Efficiency Projects Improve Competitiveness and Protect Jobs U.S. Department of Energy (DOE)...

  6. Residential Energy Efficiency Customer Service Best Practices...

    Energy Savers [EERE]

    Residential Energy Efficiency Customer Service Best Practices Residential Energy Efficiency Customer Service Best Practices Better Buildings Residential Network Peer Exchange Call...

  7. LANL computer model boosts engine efficiency

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

    LANL computer model boosts engine efficiency LANL computer model boosts engine efficiency The KIVA model has been instrumental in helping researchers and manufacturers understand...

  8. Better Buildings Neighborhood Program: Energy Efficiency Market...

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

    Program: Energy Efficiency Market Sustainable Business Planning Better Buildings Neighborhood Program: Energy Efficiency Market Sustainable Business Planning U.S. Department of...

  9. Building America Residential Buildings Energy Efficiency Meeting...

    Energy Savers [EERE]

    Building America Residential Buildings Energy Efficiency Meeting: July 2010 Building America Residential Buildings Energy Efficiency Meeting: July 2010 On this page, you may link...

  10. Energy Efficiency and Conservation Block Grant Program

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

    3) construct new climate neutral public facility with installation of solar photovoltaic, solar heating, energy efficiency HVAC, energy efficiency lighting and energy star...

  11. Emerging energy-efficient technologies for industry

    E-Print Network [OSTI]

    2004-01-01T23:59:59.000Z

    J. , Nadel, S. , 2000. “Emerging Energy-Efficient IndustrialThorne, J. , 1998. “Emerging Energy-Saving Technologies andand Policy Implications of Energy and Material Efficiency

  12. Emerging energy-efficient technologies for industry

    E-Print Network [OSTI]

    2001-01-01T23:59:59.000Z

    J. , Nadel, S. , 2000. “Emerging Energy-Efficient IndustrialThorne, J. , 1998. “Emerging Energy-Saving Technologies andand Policy Implications of Energy and Material Efficiency

  13. Emerging Energy-Efficient Technologies for Industry

    E-Print Network [OSTI]

    2005-01-01T23:59:59.000Z

    Thorne, J. , 1998. “Emerging Energy-Saving Technologies andand Policy Implications of Energy and Material EfficiencyD. Ed. 1999. “Industrial Energy Efficiency Policies:

  14. Southeast Energy Efficiency Alliance's Building Energy Codes...

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

    Southeast Energy Efficiency Alliance's Building Energy Codes Project Southeast Energy Efficiency Alliance's Building Energy Codes Project Building Codes Project for the 2013...

  15. Business of Energy Efficiency Workshop presentation | Department...

    Energy Savers [EERE]

    Business of Energy Efficiency Workshop presentation Business of Energy Efficiency Workshop presentation A presentation by Dr. Kathleen Hogan, Deputy Assistant Secretary for Energy...

  16. Emerging energy-efficient technologies for industry

    E-Print Network [OSTI]

    2001-01-01T23:59:59.000Z

    1998. “Emerging Energy-Saving Technologies and Practices for2000. “Emerging Energy-Efficient Industrial Technologies,”Emerging Energy-Efficient Technologies for Industry Ernst

  17. Emerging Energy-Efficient Technologies for Industry

    E-Print Network [OSTI]

    2005-01-01T23:59:59.000Z

    1998. “Emerging Energy-Saving Technologies and Practices for200 emerging energy-efficient technologies in industry, of2000. “Emerging Energy-Efficient Industrial Technologies,”

  18. Emerging energy-efficient technologies for industry

    E-Print Network [OSTI]

    2004-01-01T23:59:59.000Z

    1998. “Emerging Energy-Saving Technologies and Practices for2000. “Emerging Energy-Efficient Industrial Technologies,”Emerging Energy-Efficient Technologies for Industry Ernst

  19. DOE Continues Aggressive Energy Efficiency Enforcement Effort...

    Energy Savers [EERE]

    Continues Aggressive Energy Efficiency Enforcement Effort with Nearly 30 New Proposed Penalties DOE Continues Aggressive Energy Efficiency Enforcement Effort with Nearly 30 New...

  20. Consumers Energy (Electric)- Commercial Energy Efficiency Program

    Broader source: Energy.gov [DOE]

    Prescriptive incentives are available for energy efficiency equipment upgrades and are paid based on the quantity, size and efficiency of the equipment. Custom incentives are available to...

  1. Guide for Benchmarking Residential Energy Efficiency Program...

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

    Guide for Benchmarking Residential Energy Efficiency Program Progress as part of the DOE Better Buildings Program. Guide for Benchmarking Residential Energy Efficiency Program...

  2. Sustainable Business Models - Utilities and Efficiency Partnerships...

    Energy Savers [EERE]

    Sustainable Business Models - Utilities and Efficiency Partnerships Sustainable Business Models - Utilities and Efficiency Partnerships Provides an overview and lessons learned on...

  3. Cascade Natural Gas- Commercial Efficiency Rebate Program

    Broader source: Energy.gov [DOE]

    Incentives are only valid if the new equipment provides a significant efficiency increase over existing equipment. Customers requesting site-specific energy efficiency measures must submit...

  4. Berkshire Gas- Commercial Energy Efficiency Rebate Program

    Broader source: Energy.gov [DOE]

    Berkshire Gas Company (BCG) provides rebates for its commercial and industrial customers to pursue energy efficient improvements to their facilities. As a part of their energy efficiency program,...

  5. Regional Energy Efficiency Programs | Department of Energy

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

    Programs Regional Energy Efficiency Programs This presentation covers regional industrial energy efficiency programs in the Midwest, Southeast, and Southwest. Regional Energy...

  6. Roaring Fork Valley- Energy Efficient Appliance Program

    Broader source: Energy.gov [DOE]

    The Aspen Community Office for Resource Efficiency (CORE) promotes renewable energy, energy efficiency and green building techniques in western Colorado's Roaring Fork Valley. For customers who...

  7. Categorical Exclusion Determinations: Office of Energy Efficiency...

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

    Energy Efficiency and Renewable Energy Categorical Exclusion Determinations: Office of Energy Efficiency and Renewable Energy Categorical Exclusion Determinations issued by Energy...

  8. Residential Energy Efficiency Research Planning Meeting Summary...

    Energy Savers [EERE]

    Residential Energy Efficiency Research Planning Meeting Summary Report Residential Energy Efficiency Research Planning Meeting Summary Report This report summarizes key findings...

  9. Industrial Energy Efficiency: Designing Effective State Programs...

    Energy Savers [EERE]

    Industrial Energy Efficiency: Designing Effective State Programs for the Industrial Sector Industrial Energy Efficiency: Designing Effective State Programs for the Industrial...

  10. Worldwide Energy Efficiency Action through Capacity Building...

    Open Energy Info (EERE)

    and Training (WEACT) Jump to: navigation, search Logo: Worldwide Energy Efficiency Action through Capacity Building and Training (WEACT) Name Worldwide Energy Efficiency Action...

  11. Efficiency Maine Data Dashboard | Department of Energy

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

    Data Dashboard Efficiency Maine Data Dashboard The data dashboard for Efficiency Maine, a partner in the Better Buildings Neighborhood Program. bbnpbban0003560pmcdashboardy13...

  12. El Paso Electric Company- Commercial Efficiency Program

    Broader source: Energy.gov [DOE]

    The El Paso Electric (EPE) Commercial Efficiency Program pays incentives to commercial and industrial customers who install energy efficiency measures in facilities located within EPE's New Mexico...

  13. CPS Energy- Commercial Energy Efficiency Rebates

    Broader source: Energy.gov [DOE]

    CPS Energy, San Antonio's municipal electric utility, offers energy efficiency rebates for commercial electric customers. Rebates are available for several defined energy efficiency improvements,...

  14. Sandia National Laboratories: increased photovoltaic efficiency

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

    increased photovoltaic efficiency Combining 'Tinkertoy' Materials with Solar Cells for Increased Photovoltaic Efficiency On December 4, 2014, in Energy, Materials Science, News,...

  15. Residential Energy Efficiency Customer Service Best Practices...

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

    Residential Energy Efficiency Customer Service Best Practices Peer Exchange Call Residential Energy Efficiency Customer Service Best Practices Peer Exchange Call January 22, 2015...

  16. SRP- Residential Energy Efficiency Rebate Program

    Broader source: Energy.gov [DOE]

    SRP's Residential Energy Efficiency Rebate Program is designed to encourage residential SRP customers to utilize energy efficient appliances and measures at home. Rebates and discounts are...

  17. Empire District Electric- Residential Energy Efficiency Rebate

    Broader source: Energy.gov [DOE]

    The Empire District Electric Company offers rebates for customers who construct highly efficient homes and purchase efficient central air conditioners. Eligible customers include residential...

  18. IID Energy- Residential Energy Efficiency Rebate Program

    Broader source: Energy.gov [DOE]

    Imperial Irrigation District Energy offers incentives to residential customers to encourage energy efficiency. This incentive takes the form of rebates offered for qualifying energy efficient...

  19. Idaho Power- Irrigation Efficiency Rewards Rebate Program

    Broader source: Energy.gov [DOE]

    Through Idaho Power's Irrigation Efficiency Rewards program, agricultural irrigation customers qualify to receive an incentive for a portion of the cost to install a new, more efficient irrigation...

  20. Randolph EMC- Energy Efficient Home Discount Program

    Broader source: Energy.gov [DOE]

    Randolph Electric Membership Corporation offers a special electric bill discount to members who increase the energy efficiency of homes through the Energy Efficient Home Discount Program. Members...