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


1

DESIGN AND DEVELOPMENT TESTING OF AN IMPROVED (1 HIGH-EFFICIENCY WATER HEATER  

E-Print Network [OSTI]

#12;DESIGN AND DEVELOPMENT TESTING OF AN IMPROVED (1 HIGH-EFFICIENCY WATER HEATER (2} (3) (21 icense in and to any copyright covering the drticle. This paper describes a high-efficiency water heater which uses a design approach quite different from the conventional center-flue water heater. While high

Oak Ridge National Laboratory

2

Highly efficient 6-stroke engine cycle with water injection  

DOE Patents [OSTI]

A six-stroke engine cycle having improved efficiency. Heat is recovered from the engine combustion gases by using a 6-stroke engine cycle in which combustion gases are partially vented proximate the bottom-dead-center position of the fourth stroke cycle, and water is injected proximate the top-dead-center position of the fourth stroke cycle.

Szybist, James P; Conklin, James C

2012-10-23T23:59:59.000Z

3

NASA's Marshall Space Flight Center Saves Water With High-Efficiency...  

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

NASA's Marshall Space Flight Center Saves Water With High-Efficiency Toilet and Urinal Program: Best Management Practice Case Study 6 - Toilets and Urinals (Fact Sheet), Federal...

4

High Efficiency R-744 Commercial Heat Pump Water Heaters  

SciTech Connect (OSTI)

The project investigated the development and improvement process of a R744 (CO2) commercial heat pump water heater (HPWH) package of approximately 35 kW. The improvement process covered all main components of the system. More specific the heat exchangers (Internal heat exchanger, Evaporator, Gas cooler) as well as the expansion device and the compressor were investigated. In addition, a comparison to a commercially available baseline R134a unit of the same capacity and footprint was made in order to compare performance as well as package size reduction potential.

Elbel, Dr. Stefan W.; Petersen, Michael

2013-04-25T23:59:59.000Z

5

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...

6

Life cycle assessment of buildings technologies: High-efficiency commercial lighting and residential water heaters  

SciTech Connect (OSTI)

In this study the life cycle emissions and energy use are estimated for two types of energy technologies. The first technology evaluated is the sulfur lamp, a high-efficiency lighting system under development by the US Department of Energy (DOE) and Fusion Lighting, the inventor of the technology. The sulfur lamp is compared with conventional metal halide high-intensity discharge lighting systems. The second technology comparison is between standard-efficiency and high-efficiency gas and electric water heaters. In both cases the life cycle energy use and emissions are presented for the production of an equivalent level of service by each of the technologies. For both analyses, the energy use and emissions from the operation of the equipment are found to dominate the life cycle profile. The life cycle emissions for the water heating systems are much more complicated. The four systems compared include standard- and high-efficiency gas water heaters, standard electric resistance water heaters, and heat pump water heaters.

Freeman, S.L.

1997-01-01T23:59:59.000Z

7

Research and development of a high efficiency gas-fired water heater. Volume 2. Task reports  

SciTech Connect (OSTI)

Design and development of a cost-effective high efficiency gas-fired water heater to attain a service efficiency of 70% (including the effect of exfiltration) and a service efficiency of 78% (excluding exfiltration) for a 75 GPD draw at a 90/sup 0/F temperature rise, with a stored water to conditioned air temperature difference of 80/sup 0/F, are described in detail. Based on concept evaluation, a non-powered natural draft water heater was chosen as the most cost-effective design to develop. The projected installed cost is $374 compared to $200 for a conventional unit. When the project water heater is compared to a conventional unit, it has a payback of 3.7 years and life cycle savings of $350 to the consumer. A prototype water heater was designed, constructed, and tested. When operated with sealed combustion, the unit has a service efficiency of 66.4% (including the effect of exfiltration) below a burner input of 32,000 Btu/h. In the open combustion configuration, the unit operated at a measured efficiency of 66.4% Btu/h (excluding exfiltration). This compares with a service efficiency of 51.3% for a conventional water heater and 61% for a conventional high efficiency unit capable of meeting ASHRAE 90-75. Operational tests showed the unit performed well with no evidence of stacking or hot spots. It met or exceeded all capacity or usage tests specified in the program test plan and met all emission goals. Future work will concentrate on designing, building, and testing pre-production units. It is anticipated that both sealed combustion and open draft models will be pursued.

Vasilakis, A.D.; Pearson, J.F.; Gerstmann, J.

1980-01-01T23:59:59.000Z

8

Efficient Water Use & Management  

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

Goals 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....

9

Water/Wastewater Engineering Report (High Efficiency Pump/Motor Replacement - M2 Model)  

E-Print Network [OSTI]

Pumping water or wastewater is the largest use of electricity for a municipal water supply or wastewater treatment plant. Increasing the overall efficiency of the pumping system can achieve significant energy savings. Overall pump system...

Liu, Z.; Brumbelow, K.; Haberl, J. S.

2006-10-30T23:59:59.000Z

10

Development of High Efficiency Carbon Dioxide Commercial Heat Pump Water Heater  

SciTech Connect (OSTI)

Although heat pump water heaters are today widely accepted in both Japan and Europe, where energy costs are high and government incentives for their use exist, acceptance of such products in the US has been limited. While this trend is slowly changing with the introduction of heat pump water heaters into the residential market, but acceptance remains low in the commercial sector. The objective of the presented work is the development of a high efficiency R744 heat pump water heater for commercial applications with effective utilization of the cooling capability for air conditioning and/or refrigeration. The ultimate goal is to achieve total system COP of up to 8. This unit will be targeted at commercial use where some cooling load is typically needed year round, such as restaurants, hotels, nursing homes, and hospitals. This paper presents the performance results from the development of four R744 commercial heat pump water heater packages of approximately 35 kW and comparison to a commercially available baseline R134a unit of the same capacity and footprint. In addition, the influences of an internal heat exchanger and an enhanced evaporator on the system performance are described and recommendations are made for further improvements of the R744 system.

Michael PETERSEN; Chad D. BOWERS; Stefan ELBEL; Pega HRNJAK

2012-07-01T23:59:59.000Z

11

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...

12

Water Efficiency Case Studies | Department of Energy  

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

demonstrating technologies, and creating specifications for high-efficiency fixtures. Boiler Upgrades and Decentralizing Steam Systems Save Water and Energy at Naval Air Station...

13

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...

14

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.

15

Program Sustainability: Coordinating Energy Efficiency with Water...  

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

Program Sustainability: Coordinating Energy Efficiency with Water Conservation Services Peer Exchange Call Program Sustainability: Coordinating Energy Efficiency with Water...

16

Energy-efficient water heating  

SciTech Connect (OSTI)

This fact sheet describes how to reduce the amount of hot water used in faucets and showers, automatic dishwashers, and washing machines; how to increase water-heating system efficiency by lowering the water heater thermostat, installing a timer and heat traps, and insulating hot water pipes and the storage tank; and how to use off-peak power to heat water. A resource list for further information is included.

NONE

1995-01-01T23:59:59.000Z

17

Columbia Water and Light- HVAC and Lighting Efficiency Rebates  

Broader source: Energy.gov [DOE]

Columbia Water and Light (CWL) offers rebates to its commercial and industrial customers for the purchase of high efficiency HVAC installations and efficient lighting. Incentives for certain...

18

High Efficiency Generation of Hydrogen Fuels Using Solar Thermochemical Splitting of Water  

SciTech Connect (OSTI)

The objective of this work is to identify economically feasible concepts for the production of hydrogen from water using solar energy. The ultimate project objective was to select one or more competitive concepts for pilot-scale demonstration using concentrated solar energy. Results of pilot scale plant performance would be used as foundation for seeking public and private resources for full-scale plant development and testing. Economical success in this venture would afford the public with a renewable and limitless source of energy carrier for use in electric power load-leveling and as a carbon-free transportation fuel. The Solar Hydrogen Generation Research (SHGR) project embraces technologies relevant to hydrogen research under the Office of Hydrogen Fuel Cells and Infrastructure Technology (HFCIT) as well as concentrated solar power under the Office of Solar Energy Technologies (SET). Although the photoelectrochemical work is aligned with HFCIT, some of the technologies in this effort are also consistent with the skills and technologies found in concentrated solar power and photovoltaic technology under the Office of Solar Energy Technologies (SET). Hydrogen production by thermo-chemical water-splitting is a chemical process that accomplishes the decomposition of water into hydrogen and oxygen using only heat or a combination of heat and electrolysis instead of pure electrolysis and meets the goals for hydrogen production using only water and renewable solar energy as feed-stocks. Photoelectrochemical hydrogen production also meets these goals by implementing photo-electrolysis at the surface of a semiconductor in contact with an electrolyte with bias provided by a photovoltaic source. Here, water splitting is a photo-electrolytic process in which hydrogen is produced using only solar photons and water as feed-stocks. The thermochemical hydrogen task engendered formal collaborations among two universities, three national laboratories and two private sector entities. The photoelectrochemical hydrogen task included formal collaborations with three universities and one national laboratory. The formal participants in these two tasks are listed above. Informal collaborations in both projects included one additional university (the University of Nevada, Reno) and two additional national laboratories (Lawrence Livermore National Laboratory and Lawrence Berkeley National Laboratory).

Heske, Clemens; Moujaes, Samir; Weimer, Alan; Wong, Bunsen; Siegal, Nathan; McFarland, Eric; Miller, Eric; Lewis, Michele; Bingham, Carl; Roth, Kurth; Sabacky, Bruce; Steinfeld, Aldo

2011-09-29T23:59:59.000Z

19

High Efficiency Hydrogen Production from Nuclear Energy: Laboratory Demonstration of S-I Water-Splitting  

SciTech Connect (OSTI)

The objective of the French CEA, US-DOE INERI project is to perform a lab scale demonstration of the sulfur iodine (S-I) water splitting cycle, and assess the potential of this cycle for application to nuclear hydrogen production. The project will design, construct and test the three major component reaction sections that make up the S-I cycle. The CEA will design and test the prime (Bunsen) reaction section. General Atomics will develop and test the HI decomposition section, and SNL will develop and test the H2SO4 decomposition section. Activities for this period included initial program coordination and information exchange, the development of models and analyses that will support the design of the component sections, and preliminary designs for the component reaction sections. The sections are being designed to facilitate integration into a closed loop demonstration in a later stage of the program.

Buckingham, R.; Russ, B.; Brown, L.; Besenbruch, G.E.; Gelbard, F.; Pickard F.S.; Leybros, J.; Le Duigou, A.; Borgard, J.M.

2004-11-30T23:59:59.000Z

20

Efficiency Projects and Water Reuse  

E-Print Network [OSTI]

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...? are extremely important to a successful audit - Be very careful with estimates! ? Reduction in Real Loss of 201,550,239 gallons ? Savings to the Utility of Approx. $765,890.91 ?Reduce Water ?Loss? Thru Better Auditing And Metering Improvements ? A...

Pannell, B.

2011-01-01T23:59:59.000Z

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


21

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...

22

High efficiency incandescent lighting  

DOE Patents [OSTI]

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.

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

23

High Efficiency, Clean Combustion  

SciTech Connect (OSTI)

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

Donald Stanton

2010-03-31T23:59:59.000Z

24

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...

25

Water Conservation and Water Use Efficiency (Wisconsin)  

Broader source: Energy.gov [DOE]

Wisconsin has several statutes that promote water conservation and controlled water use, and this legislation establishes mandatory and voluntary programs in water conservation and water use...

26

High Efficiency Integrated Package  

SciTech Connect (OSTI)

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.

Ibbetson, James

2013-09-15T23:59:59.000Z

27

Water Use Reduction and Efficiency | Department of Energy  

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

Water Use Reduction and Efficiency Water Use Reduction and Efficiency Water Use Reduction and Efficiency The Federal Energy Management Program (FEMP) provides agencies with...

28

Water Use Reduction and Efficiency Case Studies | Department...  

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

Program Areas Water Use Reduction Water Use Reduction and Efficiency Case Studies Water Use Reduction and Efficiency Case Studies These case studies feature examples of water...

29

High Efficiency Integrated Space Conditioning, Water Heating and Air Distribution System for HUD-Code Manufactured Housing  

SciTech Connect (OSTI)

Recognizing the need for new space conditioning and water heating systems for manufactured housing, DeLima Associates assembled a team to develop a space conditioning system that would enhance comfort conditions while also reducing energy usage at the systems level. The product, Comboflair® was defined as a result of a needs analysis of project sponsors and industry stakeholders. An integrated system would be developed that would combine a packaged airconditioning system with a small-duct, high-velocity air distribution system. In its basic configuration, the source for space heating would be a gas water heater. The complete system would be installed at the manufactured home factory and would require no site installation work at the homesite as is now required with conventional split-system air conditioners. Several prototypes were fabricated and tested before a field test unit was completed in October 2005. The Comboflair® system, complete with ductwork, was installed in a 1,984 square feet, double-wide manufactured home built by Palm Harbor Homes in Austin, TX. After the home was transported and installed at a Palm Harbor dealer lot in Austin, TX, a data acquisition system was installed for remote data collection. Over 60 parameters were continuously monitored and measurements were transmitted to a remote site every 15 minutes for performance analysis. The Comboflair® system was field tested from February 2006 until April 2007. The cooling system performed in accordance with the design specifications. The heating system initially could not provide the needed capacity at peak heating conditions until the water heater was replaced with a higher capacity standard water heater. All system comfort goals were then met. As a result of field testing, we have identified improvements to be made to specific components for incorporation into production models. The Comboflair® system will be manufactured by Unico, Inc. at their new production facility in St. Louis, MO. The product will be initially launched in the hot-humid climates of the southern U.S.

Henry DeLima; Joe Akin; Joseph Pietsch

2008-09-14T23:59:59.000Z

30

The Energy-Water Nexus: Implications for Energy Efficiency  

E-Print Network [OSTI]

THE ENERGY-WATER NEXUS: IMPLICATIONS FOR ENERGY EFFICIENCY Michael R. Muller Center for Advanced Energy Systems, Rutgers University Piscataway, NJ John F. Gardner Director, CAES Energy Efficiency Research Institute Boise State University... cooling towers!!!! • High cost of treatment added to water costs – Result = dry cooling towers • Reduction in energy efficiency accepted ESL-IE-14-05-21 Proceedings of the Thrity-Sixth Industrial Energy Technology Conference New Orleans, LA. May 20...

Muller, M. R.; Gardiner, J.; Muller, M. B.; Shrestha, D.

2014-01-01T23:59:59.000Z

31

Water Efficiency Improvements at Various U.S. Environmental Protection...  

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

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

32

Smart Schools: Water Use Efficiency  

E-Print Network [OSTI]

Occupan cy (ppl/unit) Landscap ing Area Single-Family Residence 1 2.5 830 ft2 Multifamily Complex 540 3.5 #12;Baseline water use and zero-net water use goals UC Davis West Village Case Study Site Site Area.065 Multifamily Complex 20 acres 9.24 51.9 Overall Community 220 acres 102.1 154.3 #12;Indoor water use duration

California at Davis, University of

33

Light Water Reactor Sustainability Program BWR High-Fluence Material Project: Assessment of the Role of High-Fluence on the Efficiency of HWC Mitigation on SCC Crack Growth Rates  

SciTech Connect (OSTI)

As nuclear power plants age, the increasing neutron fluence experienced by stainless steels components affects the materials resistance to stress corrosion cracking and fracture toughness. The purpose of this report is to identify any new issues that are expected to rise as boiling water reactor power plants reach the end of their initial life and to propose a path forward to study such issues. It has been identified that the efficiency of hydrogen water chemistry mitigation technology may decrease as fluence increases for high-stress intensity factors. This report summarizes the data available to support this hypothesis and describes a program plan to determine the efficiency of hydrogen water chemistry as a function of the stress intensity factor applied and fluence. This program plan includes acquisition of irradiated materials, generation of material via irradiation in a test reactor, and description of the test plan. This plan offers three approaches, each with an estimated timetable and budget.

Sebastien Teysseyre

2014-04-01T23:59:59.000Z

34

3D branched nanowire heterojunction photoelectrodes for high-efficiency solar water splitting and H2 generation  

E-Print Network [OSTI]

, it is essential to find a cost-effective and clean method for mass production of hydrogen.6 Techniques for directly con- verting water to hydrogen using solar energy, known as photo- electrolysis, are receiving dimensional branched ZnO/Si heterojunction nanowire array by a two-step, wafer-scale, low-cost, solution

Wang, Deli

35

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

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

428114 Computationally Efficient Modeling of High-Efficiency Clean Combustion Engines Daniel Flowers (PI), Salvador Aceves, Nicholas Killingsworth, Matthew McNenly, Thomas...

36

High Efficiency Engine Technologies Program  

SciTech Connect (OSTI)

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.

Rich Kruiswyk

2010-07-13T23:59:59.000Z

37

Enabling High Efficiency Ethanol Engines  

SciTech Connect (OSTI)

Delphi Automotive Systems and ORNL established this CRADA to explore the potential to improve the energy efficiency of spark-ignited engines operating on ethanol-gasoline blends. By taking advantage of the fuel properties of ethanol, such as high compression ratio and high latent heat of vaporization, it is possible to increase efficiency with ethanol blends. Increasing the efficiency with ethanol-containing blends aims to remove a market barrier of reduced fuel economy with E85 fuel blends, which is currently about 30% lower than with petroleum-derived gasoline. The same or higher engine efficiency is achieved with E85, and the reduction in fuel economy is due to the lower energy density of E85. By making ethanol-blends more efficient, the fuel economy gap between gasoline and E85 can be reduced. In the partnership between Delphi and ORNL, each organization brought a unique and complementary set of skills to the project. Delphi has extensive knowledge and experience in powertrain components and subsystems as well as overcoming real-world implementation barriers. ORNL has extensive knowledge and expertise in non-traditional fuels and improving engine system efficiency for the next generation of internal combustion engines. Partnering to combine these knowledge bases was essential towards making progress to reducing the fuel economy gap between gasoline and E85. ORNL and Delphi maintained strong collaboration throughout the project. Meetings were held regularly, usually on a bi-weekly basis, with additional reports, presentations, and meetings as necessary to maintain progress. Delphi provided substantial hardware support to the project by providing components for the single-cylinder engine experiments, engineering support for hardware modifications, guidance for operational strategies on engine research, and hardware support by providing a flexible multi-cylinder engine to be used for optimizing engine efficiency with ethanol-containing fuels.

Szybist, J.; Confer, K. (Delphi Automotive Systems)

2011-03-01T23:59:59.000Z

38

NASA's Marshall Space Flight Center Saves Water With High-Efficiency Toilet and Urinal Program: Best Management Practice Case Study #6 - Toilets and Urinals (Fact Sheet)  

SciTech Connect (OSTI)

The National Aeronautics and Space Administration's (NASA) Marshall Space Flight Center (MSFC) has a longstanding, successful sustainability program that focuses on energy and water efficiency as well as environmental protection. Because MSFC was built in the 1960s, most of the buildings house outdated, inefficient restroom fixtures. The facility engineering team at MSFC developed an innovative efficiency model for replacing these older toilets and urinals.

Not Available

2011-02-01T23:59:59.000Z

39

Energy -- and Water -- Efficiency in the DOE Zero Energy Ready...  

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

Energy -- and Water -- Efficiency in the DOE Zero Energy Ready Home Program Webinar (Text Version) Energy -- and Water -- Efficiency in the DOE Zero Energy Ready Home Program...

40

Efficient Residential Water Heaters Webinar | Department of Energy  

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

Weatherization Assistance Program Pilot Projects Efficient Residential Water Heaters Webinar Efficient Residential Water Heaters Webinar On Feb. 22, 2011, Jerone Gagliano,...

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


41

Best Management Practices for Water Efficiency | Department of...  

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

Practices for Water Efficiency Best Management Practices for Water Efficiency The Federal Energy Management Program (FEMP) worked with the U.S. Environmental Protection Agency...

42

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...

43

Optimizing Water Efficiency in Distributed Data Centers Shaolei Ren  

E-Print Network [OSTI]

embarrassing lack of attention to the enormity of data center water consumption despite its emergenceOptimizing Water Efficiency in Distributed Data Centers Shaolei Ren School of Computing water efficiency. We first identify two characteristics of data center water efficiency: water

Ren, Shaolei

44

High Efficiency Fans and High Efficiency Electrical Motors  

E-Print Network [OSTI]

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...

Breedlove, C. W.

45

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...

46

HIGH EFFICIENCY GENERATION OF HYDROGEN FUELS  

E-Print Network [OSTI]

) · Solar (Solar thermal, Photovoltaic) · Renewables (Hydropower, Geothermal, Wind, Biomass) Nuclear power power generation ­ Electrolysis · Overall efficiency approximately 25-30% (efficiency of electric power · Splits water at moderate temperatures (~700-900°C vs ~5,000°C for thermolysis) · Plant efficiencies

47

Muscatine Power and Water- Commercial and Industrial Energy Efficiency Rebates  

Broader source: Energy.gov [DOE]

Muscatine Power and Water (MP&W) offers rebates for energy efficient upgrades to commercial and industrial customers. Rebates are available for commercial lighting retrofits, energy efficient...

48

Rising Above the Water: New Orleans Implements Energy Efficiency...  

Energy Savers [EERE]

Rising Above the Water: New Orleans Implements Energy Efficiency and Sustainability Practices Following Hurricanes Katrina and Rita (Fact Sheet) Rising Above the Water: New Orleans...

49

Chapter 23 - Environment, Energy and Water Efficiency, Renewable...  

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

Chapter 23 - Environment, Energy and Water Efficiency, Renewable Energy Technologies, Occupational Safety, and Drug-free Workplace. Chapter 23 - Environment, Energy and Water...

50

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...

51

City Water Light and Power- Commercial Energy Efficiency Rebate Programs  

Broader source: Energy.gov [DOE]

City Water Light and Power (CWLP) offers rebates to help commercial customers increase the energy efficiency of participating facilities. Energy efficient air-to-air, geothermal and water-loop...

52

Kitchen Appliance Upgrades Improve Water Efficiency at DOD Exchange Facilities  

Broader source: Energy.gov [DOE]

Case study details the Exchange (formerly the Army and Air Force Exchange Service), which took a leadership role in kitchen appliance upgrades to improve water efficiency by integrating water efficiency concepts into the organization's overall sustainability plan and objectives.

53

High efficiency turbine blade coatings.  

SciTech Connect (OSTI)

The development of advanced thermal barrier coatings (TBCs) of yttria stabilized zirconia (YSZ) that exhibit lower thermal conductivity through better control of electron beam - physical vapor deposition (EB-PVD) processing is of prime interest to both the aerospace and power industries. This report summarizes the work performed under a two-year Lab-Directed Research and Development (LDRD) project (38664) to produce lower thermal conductivity, graded-layer thermal barrier coatings for turbine blades in an effort to increase the efficiency of high temperature gas turbines. This project was sponsored by the Nuclear Fuel Cycle Investment Area. Therefore, particular importance was given to the processing of the large blades required for industrial gas turbines proposed for use in the Brayton cycle of nuclear plants powered by high temperature gas-cooled reactors (HTGRs). During this modest (~1 full-time equivalent (FTE)) project, the processing technology was developed to create graded TBCs by coupling ion beam-assisted deposition (IBAD) with substrate pivoting in the alumina-YSZ system. The Electron Beam - 1200 kW (EB-1200) PVD system was used to deposit a variety of TBC coatings with micron layered microstructures and reduced thermal conductivity below 1.5 W/m.K. The use of IBAD produced fully stoichiometric coatings at a reduced substrate temperature of 600 oC and a reduced oxygen background pressure of 0.1 Pa. IBAD was also used to successfully demonstrate the transitioning of amorphous PVD-deposited alumina to the -phase alumina required as an oxygen diffusion barrier and for good adhesion to the substrate Ni2Al3 bondcoat. This process replaces the time consuming thermally grown oxide formation required before the YSZ deposition. In addition to the process technology, Direct Simulation Monte Carlo plume modeling and spectroscopic characterization of the PVD plumes were performed. The project consisted of five tasks. These included the production of layered periodic microstructures in the coating, the Direct Simulation Monte Carlo (DSMC) modeling of particle transport in the PVD plume, functional graded layer development, the deposition of all layers to form a complete coating, and materials characterization including thermal testing. Ion beam-assisted deposition, beam sharing through advanced digital rastering, substrate pivoting, hearth calorimetry, infrared imaging, fiber optic-enabled optical emission spectroscopy and careful thermal management were used to achieve all the milestones outlined in the FY02 LDRD proposal.

Youchison, Dennis L.; Gallis, Michail A.

2014-06-01T23:59:59.000Z

54

Enabling High Efficiency Clean Combustion  

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

for Efficiency Improvement Controls Variable Valve Actuation Variable Intake Swirl Turbo Technology Electrically Driven Components Aftertreatment Phase 2 0 2 4 6 8 0 0.2 0.4...

55

High Energy Efficiency Air Conditioning  

SciTech Connect (OSTI)

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.

Edward McCullough; Patrick Dhooge; Jonathan Nimitz

2003-12-31T23:59:59.000Z

56

High Efficiency, High Performance Clothes Dryer  

SciTech Connect (OSTI)

This program covered the development of two separate products; an electric heat pump clothes dryer and a modulating gas dryer. These development efforts were independent of one another and are presented in this report in two separate volumes. Volume 1 details the Heat Pump Dryer Development while Volume 2 details the Modulating Gas Dryer Development. In both product development efforts, the intent was to develop high efficiency, high performance designs that would be attractive to US consumers. Working with Whirlpool Corporation as our commercial partner, TIAX applied this approach of satisfying consumer needs throughout the Product Development Process for both dryer designs. Heat pump clothes dryers have been in existence for years, especially in Europe, but have not been able to penetrate the market. This has been especially true in the US market where no volume production heat pump dryers are available. The issue has typically been around two key areas: cost and performance. Cost is a given in that a heat pump clothes dryer has numerous additional components associated with it. While heat pump dryers have been able to achieve significant energy savings compared to standard electric resistance dryers (over 50% in some cases), designs to date have been hampered by excessively long dry times, a major market driver in the US. The development work done on the heat pump dryer over the course of this program led to a demonstration dryer that delivered the following performance characteristics: (1) 40-50% energy savings on large loads with 35 F lower fabric temperatures and similar dry times; (2) 10-30 F reduction in fabric temperature for delicate loads with up to 50% energy savings and 30-40% time savings; (3) Improved fabric temperature uniformity; and (4) Robust performance across a range of vent restrictions. For the gas dryer development, the concept developed was one of modulating the gas flow to the dryer throughout the dry cycle. Through heat modulation in a gas dryer, significant time and energy savings, combined with dramatically reduced fabric temperatures, was achieved in a cost-effective manner. The key design factor lay in developing a system that matches the heat input to the dryer with the fabrics ability to absorb it. The development work done on the modulating gas dryer over the course of this program led to a demonstration dryer that delivered the following performance characteristics: (1) Up to 25% reduction in energy consumption for small and medium loads; (2) Up to 35% time savings for large loads with 10-15% energy reduction and no adverse effect on cloth temperatures; (3) Reduced fabric temperatures, dry times and 18% energy reduction for delicate loads; and, (4) Robust performance across a range of vent restrictions.

Peter Pescatore; Phil Carbone

2005-03-31T23:59:59.000Z

57

Webinar: Highly Efficient Solar Thermochemical Reaction Systems  

Broader source: Energy.gov [DOE]

Video recording and text version of the Fuel Cell Technologies Office webinar titled "Highly Efficient Solar Thermochemical Reaction Systems," originally presented on January 13, 2015.

58

High efficiency Brayton cycles using LNG  

DOE Patents [OSTI]

A modified, closed-loop Brayton cycle power conversion system that uses liquefied natural gas as the cold heat sink media. When combined with a helium gas cooled nuclear reactor, achievable efficiency can approach 68 76% (as compared to 35% for conventional steam cycle power cooled by air or water). A superheater heat exchanger can be used to exchange heat from a side-stream of hot helium gas split-off from the primary helium coolant loop to post-heat vaporized natural gas exiting from low and high-pressure coolers. The superheater raises the exit temperature of the natural gas to close to room temperature, which makes the gas more attractive to sell on the open market. An additional benefit is significantly reduced costs of a LNG revaporization plant, since the nuclear reactor provides the heat for vaporization instead of burning a portion of the LNG to provide the heat.

Morrow, Charles W. (Albuquerque, NM)

2006-04-18T23:59:59.000Z

59

High-Efficiency Steam Electrolyzer  

SciTech Connect (OSTI)

A hydrogen economy will require readily available and affordable hydrogen fuel. Current methods of hydrogen production do not fulfill these requirements. We are working on an electrolyzer system that can provide distributed hydrogen production while taking advantage of the nation's existing natural gas infrastructure. Electrolysis is a promising hydrogen production technology both because of its ability to produce pure hydrogen from water and because it does not require large, centralized plants. Unlike other technologies, the cost of hydrogen production scales well from larger to smaller systems. Electrolysis units could be widely distributed and scaled to meet the hydrogen requirements of different users such as individual households, local fueling stations and industrial facilities. A significant drawback to traditional electrolysis is the large electricity consumption required to convert water to hydrogen and oxygen. The electricity requirements mean such systems are expensive to operate. In addition, if the electricity is provided from coal or gas-fired power plants, electrolytic hydrogen production does not mitigate greenhouse gas emissions. The concept described in this report is intended to resolve some of the problems associated with electrolytic hydrogen production. By utilizing natural gas in place of air in the anode compartment in a solid oxide electrolyzer, the electricity requirements of the system are greatly reduced. The system has the capability to produce pure hydrogen, or hydrogen humidified to levels appropriate for direct use in a PEM fuel cell. With inherent electrochemical compression, the requirement for external compression for pressurization could be reduced. This technology offers numerous advantages for distributed hydrogen production of stationary and transportation hydrogen fuel cells. Our preliminary calculations indicate that using this concept, hydrogen could be produced at a cost competitive with gasoline (on a per gallon equivalent basis) while also lowering carbon dioxide emissions.

Vance, A L; Trent, J W; See, E F; Glass, R S

2003-06-30T23:59:59.000Z

60

Thermal Strategies for High Efficiency Thermoelectric Power Generation...  

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

Thermal Strategies for High Efficiency Thermoelectric Power Generation Thermal Strategies for High Efficiency Thermoelectric Power Generation Developing integrated TE system...

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


61

Efficient high density train operations  

DOE Patents [OSTI]

The present invention provides methods for preventing low train voltages and managing interference, thereby improving the efficiency, reliability, and passenger comfort associated with commuter trains. An algorithm implementing neural network technology is used to predict low voltages before they occur. Once voltages are predicted, then multiple trains can be controlled to prevent low voltage events. Further, algorithms for managing inference are presented in the present invention. Different types of interference problems are addressed in the present invention such as "Interference. During Acceleration", "Interference Near Station Stops", and "Interference During Delay Recovery." Managing such interference avoids unnecessary brake/acceleration cycles during acceleration, immediately before station stops, and after substantial delays. Algorithms are demonstrated to avoid oscillatory brake/acceleration cycles due to interference and to smooth the trajectories of closely following trains. This is achieved by maintaining sufficient following distances to avoid unnecessary braking/accelerating. These methods generate smooth train trajectories, making for a more comfortable ride, and improve train motor reliability by avoiding unnecessary mode-changes between propulsion and braking. These algorithms can also have a favorable impact on traction power system requirements and energy consumption.

Gordon, Susanna P. (Oakland, CA); Evans, John A. (Hayward, CA)

2001-01-01T23:59:59.000Z

62

Cedarburg Light and Water Utility- Commercial Energy Efficiency Rebate Program  

Broader source: Energy.gov [DOE]

Cedarburg Light and Water Utility provides incentives for commercial, industrial and agricultural customers to increase the energy efficiency of eligible facilities. Upon request, Cedarburg Light...

63

Kitchen Appliance Upgrades Improve Water Efficiency at DOD Exchange...  

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

Kitchen Appliance Upgrades Improve Water Efficiency at DOD Exchange Facilities Case study details the U.S. Department of Defense (DOD) Exchange (formerly the Army and Air Force...

64

Best Management Practice #5: Water-Efficient Irrigation  

Broader source: Energy.gov [DOE]

Water efficiency must be considered from the initial irrigation system design phase through installation to ensure optimal performance. Consistent management and maintenance is also essential....

65

Kitchen Appliance Upgrades Improve Water Efficiency at DOD Exchange...  

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

Kitchen Appliance Upgrades Improve Water Efficiency at DOD Exchange Facilities: Best Management Practice Case Study 11: Commercial Kitchen Equipment (Brochure), Federal Energy...

66

City Water Light and Power- Residential Energy Efficiency Rebate Programs  

Broader source: Energy.gov [DOE]

City Water Light and Power (CWLP) offers rebates to Springfield residential customers for increasing the energy efficiency of participating homes. Rebates are available for geothermal heat pumps,...

67

Rising Above the Water: New Orleans Implements Energy Efficiency...  

Energy Savers [EERE]

Rising Above the Water: New Orleans Implements Energy Efficiency and Sustainability Practices Following Hurricanes Katrina and Rita On August 29, 2005, Hurricane Katrina, the...

68

Boiler System Efficiency Improves with Effective Water Treatment  

E-Print Network [OSTI]

Water treatment is an important aspect of boiler operation which can affect efficiency or result in damage if neglected. Without effective water treatment, scale can form on boiler tubes, reducing heat transfer, and causing a loss of boiler...

Bloom, D.

69

Technology Development for Light Duty High Efficient Diesel Engines...  

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

Light Duty High Efficient Diesel Engines Technology Development for Light Duty High Efficient Diesel Engines Improve the efficiency of diesel engines for light duty applications...

70

Technology Development for High Efficiency Clean Diesel Engines...  

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

Technology Development for High Efficiency Clean Diesel Engines and a Pathway to 50% Thermal Efficiency Technology Development for High Efficiency Clean Diesel Engines and a...

71

Annual Performance Report -2011 Water Use Efficiency  

E-Print Network [OSTI]

,802,005Total Water Produced and Purchased (TP) ­ Annual Volume Distribution System Leakage Summary: Note the reporting period listed above, WSU total water produced was 465.8 million gallons which is 106.5 million, service meters recorded 123.3 MilGal of water usage, which accounts for 26.5% of water produced

Collins, Gary S.

72

Very High Efficiency Solar Cell Modules  

SciTech Connect (OSTI)

The Very High Efficiency Solar Cell (VHESC) program is developing integrated optical system - PV modules for portable applications that operate at greater than 50% efficiency. We are integrating the optical design with the solar cell design, and have entered previously unoccupied design space. Our approach is driven by proven quantitative models for the solar cell design, the optical design, and the integration of these designs. Optical systems efficiency with an optical efficiency of 93% and solar cell device results under ideal dichroic splitting optics summing to 42.7 {+-} 2.5% are described.

Barnett, A.; Kirkpatrick, D.; Honsberg, C.; Moore, D.; Wanlass, M.; Emery, K.; Schwartz, R.; Carlson, D.; Bowden, S.; Aiken, D.; Gray, A.; Kurtz, S.; Kazmerski, L., et al

2009-01-01T23:59:59.000Z

73

Webinar: Highly Efficient Solar Thermochemical Reaction Systems  

Broader source: Energy.gov [DOE]

The Fuel Cell Technologies Office will present a live webinar titled "Highly Efficient Solar Thermochemical Reaction Systems" on Tuesday, January 13, from 12:00 to 1:00 p.m. Eastern Standard Time.

74

Highly Efficient Solar Thermochemical Reaction Systems  

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

Highly Efficient, Solar Thermochemical Reaction Systems (2014 R&D 100 Award Winner) U.S. Department of Energy Fuel Cell Technologies Office 2 Question and Answer * Please type your...

75

Managing Insect Pests of Cacti and Other Succulents in Water-Efficient Landscapes  

E-Print Network [OSTI]

-efficient landscape plants. There is also a chart listing water-efficient ornamentals native to Texas....

Drees, Bastiaan M.

2008-11-06T23:59:59.000Z

76

Multicolor, High Efficiency, Nanotextured LEDs  

SciTech Connect (OSTI)

We report on research results in this project which synergize advanced material science approaches with fundamental optical physics concepts pertaining to light-matter interaction, with the goal of solving seminal problems for the development of very high performance light emitting diodes (LEDs) in the blue and green for Solid State Lighting applications. Accomplishments in the duration of the contract period include (i) heteroepitaxy of nitrogen-polar LEDs on sapphire, (ii) heteroepitaxy of semipolar (11{bar 2}2) green LEDs on sapphire, (iii) synthesis of quantum-dot loaded nanoporous GaN that emits white light without phosphor conversion, (iv) demonstration of the highest quality semipolar (11{bar 2}2) GaN on sapphire using orientation-controlled epitaxy, (v) synthesis of nanoscale GaN and InGaN medium, and (vi) development of a novel liftoff process for manufacturing GaN thin-film vertical LEDs. The body of results is presented in this report shows how a solid foundation has been laid, with several noticeable accomplishments, for innovative research, consistent with the stated milestones.

Jung Han; Arto Nurmikko

2011-09-30T23:59:59.000Z

77

Annual Performance Report -2010 Water Use Efficiency  

E-Print Network [OSTI]

Consumption (AC) ­ Annual Volume 459,480,000Total Water Produced and Purchased (TP) ­ Annual Volume listed above, WSU total water produced was 459.5 million gallons which is 101.5 million gallons less than.2% of water produced. Customer (Demand Side) Goal Progress: Additional Information Regarding Supply and Demand

Collins, Gary S.

78

An International Survey of Electric Storage Tank Water Heater Efficiency and Standards  

E-Print Network [OSTI]

Survey of Electric Storage Tank Water Heater Efficiency andSurvey of Electric Storage Tank Water Heater Efficiency andby electric resistance storage tank water heaters (geysers),

Johnson, Alissa

2013-01-01T23:59:59.000Z

79

Measure Guideline: High Efficiency Natural Gas Furnaces  

SciTech Connect (OSTI)

This Measure Guideline covers installation of high-efficiency gas furnaces. Topics covered include when to install a high-efficiency gas furnace as a retrofit measure, how to identify and address risks, and the steps to be used in the selection and installation process. The guideline is written for Building America practitioners and HVAC contractors and installers. It includes a compilation of information provided by manufacturers, researchers, and the Department of Energy as well as recent research results from the Partnership for Advanced Residential Retrofit (PARR) Building America team.

Brand, L.; Rose, W.

2012-10-01T23:59:59.000Z

80

DOE Zero Energy Ready Home Efficient Hot Water Distribution I...  

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

I -- What's At Stake Webinar (Text Version) DOE Zero Energy Ready Home Efficient Hot Water Distribution I -- What's At Stake Webinar (Text Version) Below is the text version of the...

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


81

DOE Zero Energy Ready Home Efficient Hot Water Distribution II...  

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

-- How to Get it Right Webinar (Text Version) DOE Zero Energy Ready Home Efficient Hot Water Distribution II -- How to Get it Right Webinar (Text Version) Below is the text...

82

DOE ZERH Webinar: Efficient Hot Water Distribution II: How to...  

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

II: How to Get it Right DOE ZERH Webinar: Efficient Hot Water Distribution II: How to Get it Right Watch the video or view the presentation slides below Zero Energy Ready Homes...

83

Northwest Energy Efficiency Alliance- Smart Water Heat Rebate Program (Montana)  

Broader source: Energy.gov [DOE]

The Northwest Energy Efficiency Alliance (NEEA) is offering a rebate program for homeowners who purchase and install an eligible heat pump water heater. A rebate of $750 is offered for qualifying...

84

Northwest Energy Efficiency Alliance- Smart Water Heat Rebate Program (Idaho)  

Broader source: Energy.gov [DOE]

The Northwest Energy Efficiency Alliance (NEEA) is offering a rebate program for homeowners who purchase and install an eligible heat pump water heater. A rebate of $750 is offered for qualifying...

85

Northwest Energy Efficiency Alliance- Smart Water Heat Rebate Program (Oregon)  

Broader source: Energy.gov [DOE]

The Northwest Energy Efficiency Alliance (NEEA) is offering a rebate program for homeowners who purchase and install an eligible heat pump water heater. A rebate of $750 is offered for qualifying...

86

Northwest Energy Efficiency Alliance- Smart Water Heat Rebate Program (Washington)  

Broader source: Energy.gov [DOE]

The Northwest Energy Efficiency Alliance (NEEA) is offering a rebate program for homeowners who purchase and install an eligible heat pump water heater. A rebate of $750 is offered for qualifying...

87

Unregulated Emissions from High-Efficiency Clean Combustion Modes...  

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

Unregulated Emissions from High-Efficiency Clean Combustion Modes - ORNL-FEERC Unregulated Emissions from High-Efficiency Clean Combustion Modes - ORNL-FEERC Poster presentation at...

88

Integrated Solar Thermochemical Reaction System for High Efficiency...  

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

Integrated Solar Thermochemical Reaction System for High Efficiency Production of Electricity Integrated Solar Thermochemical Reaction System for High Efficiency Production of...

89

High Efficiency GDI Engine Research, with Emphasis on Ignition...  

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

High Efficiency GDI Engine Research, with Emphasis on Ignition Systems High Efficiency GDI Engine Research, with Emphasis on Ignition Systems 2013 DOE Hydrogen and Fuel Cells...

90

Tailored Materials for High Efficiency CIDI Engines (Caterpillar...  

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

High Efficiency CIDI Engines (Caterpillar CRADA) Tailored Materials for High Efficiency CIDI Engines (Caterpillar CRADA) 2009 DOE Hydrogen Program and Vehicle Technologies Program...

91

Vehicle Technologies Office: Materials for High-Efficiency Combustion...  

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

High-Efficiency Combustion Engines Vehicle Technologies Office: Materials for High-Efficiency Combustion Engines The Vehicle Technologies Office (VTO) is supporting work to improve...

92

Energy Efficiency Opportunities in Federal High Performance Computing...  

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

Energy Efficiency Opportunities in Federal High Performance Computing Data Centers Energy Efficiency Opportunities in Federal High Performance Computing Data Centers Case study...

93

Los Alamos develops new technique for growing high-efficiency...  

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

Growing high-efficiency perovskite solar cells Los Alamos develops new technique for growing high-efficiency perovskite solar cells Researchers reveal a new solution-based...

94

Development of a High-Efficiency Zonal Thermoelectric HVAC System...  

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

a High-Efficiency Zonal Thermoelectric HVAC System for Automotive Applications Development of a High-Efficiency Zonal Thermoelectric HVAC System for Automotive Applications...

95

Progress toward Development of a High-Efficiency Zonal Thermoelectric...  

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

toward Development of a High-Efficiency Zonal Thermoelectric HVAC System for Automotive Applications Progress toward Development of a High-Efficiency Zonal Thermoelectric HVAC...

96

Challenging Conventional Wisdom: A Clean and Highly Efficient...  

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

Challenging Conventional Wisdom: A Clean and Highly Efficient Opposed-Piston Two-Stroke Engine Challenging Conventional Wisdom: A Clean and Highly Efficient Opposed-Piston...

97

High Efficiency Microturbine with Integral Heat Recovery - Presentatio...  

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

High Efficiency Microturbine with Integral Heat Recovery - Presentation by Capstone Turbine Corporation, June 2011 High Efficiency Microturbine with Integral Heat Recovery -...

98

Heavy-Duty Engine Combustion Optimization for High Thermal Efficiency...  

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

Combustion Optimization for High Thermal Efficiency Targeting EPA 2010 Emissions Heavy-Duty Engine Combustion Optimization for High Thermal Efficiency Targeting EPA 2010 Emissions...

99

Energy-Efficient Melting and Direct Delivery of High Quality...  

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

Energy-Efficient Melting and Direct Delivery of High Quality Molten Aluminum Energy-Efficient Melting and Direct Delivery of High Quality Molten Aluminum itmdelivery.pdf More...

100

Highly Energy Efficient Directed Green Liquor Utilization (D...  

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

Highly Energy Efficient Directed Green Liquor Utilization (D-GLU) Pulping Highly Energy Efficient Directed Green Liquor Utilization (D-GLU) Pulping This factsheet describes a...

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


101

Electrical and Thermal Transport Optimization of High Efficient...  

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

Electrical and Thermal Transport Optimization of High Efficient n-type Skutterudites Electrical and Thermal Transport Optimization of High Efficient n-type Skutterudites Work on...

102

Vehicle Technologies Office Merit Review 2014: High Efficiency...  

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

High Efficiency, Low EMI and Positioning Tolerant Wireless Charging of EVs Vehicle Technologies Office Merit Review 2014: High Efficiency, Low EMI and Positioning Tolerant Wireless...

103

Development of Enabling Technologies for High Efficiency, Low...  

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

for High Efficiency, Low Emissions Homogeneous Charge Compression Ignition (HCCI) Engines Development of Enabling Technologies for High Efficiency, Low Emissions Homogeneous...

104

High-Efficiency Clean Combustion Design for Compression Ignition...  

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

High-Efficiency Clean Combustion Design for Compression Ignition Engines High-Efficiency Clean Combustion Design for Compression Ignition Engines Presentation given at DEER 2006,...

105

Syngas Enhanced High Efficiency Low Temperature Combustion for...  

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

Enhanced High Efficiency Low Temperature Combustion for Clean Diesel Engines Syngas Enhanced High Efficiency Low Temperature Combustion for Clean Diesel Engines A significant...

106

Low Temperature Combustion Demonstrator for High Efficiency Clean...  

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

Low Temperature Combustion Demonstrator for High Efficiency Clean Combustion Low Temperature Combustion Demonstrator for High Efficiency Clean Combustion 2009 DOE Hydrogen Program...

107

Low Temperature Combustion Demonstrator for High Efficiency Clean...  

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

Low Temperature Combustion Demonstrator for High Efficiency Clean Combustion Low Temperature Combustion Demonstrator for High Efficiency Clean Combustion Presentation from the U.S....

108

Low-Temperature Combustion Demonstrator for High-Efficiency Clean...  

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

Low-Temperature Combustion Demonstrator for High-Efficiency Clean Combustion Low-Temperature Combustion Demonstrator for High-Efficiency Clean Combustion 2010 DOE Vehicle...

109

High-Efficiency Clean Combustion Engine Designs for Compression...  

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

High-Efficiency Clean Combustion Engine Designs for Compression Ignition Engines High-Efficiency Clean Combustion Engine Designs for Compression Ignition Engines Presentation from...

110

Advanced Combustion Technology to Enable High Efficiency Clean...  

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

Combustion Technology to Enable High Efficiency Clean Combustion Advanced Combustion Technology to Enable High Efficiency Clean Combustion Summary of advanced combustion research...

111

Technology and System Level Demonstration of Highly Efficient...  

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

Technology and System Level Demonstration of Highly Efficient and Clean, Diesel Powered Class 8 Trucks Technology and System Level Demonstration of Highly Efficient and Clean,...

112

Glass-like thermal conductivity in high efficiency thermoelectric...  

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

Glass-like thermal conductivity in high efficiency thermoelectric materials Glass-like thermal conductivity in high efficiency thermoelectric materials Discusses strategies to...

113

The Energy-Water Nexus: State and Local Roles in Efficiency & Water and Wastewater Treatment Plants  

Broader source: Energy.gov [DOE]

This presentation, given through the DOE's Technical Assitance Program (TAP), provides information on the Energy-Water Nexus: State and Local Roles in Efficiency & Water and Wastewater Treatment Plants.

114

High Efficiency Solar Integrated Roof Membrane Product  

SciTech Connect (OSTI)

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.

Partyka, Eric; Shenoy, Anil

2013-05-15T23:59:59.000Z

115

Increasing Federal Office Building Water Efficiency, Federal Energy Management Program (FEMP) (Fact Sheet)  

SciTech Connect (OSTI)

Quick guide to increasing Federal office building water efficiency, water management planning, performing a water audit, calculating a water balance, and best management practices.

Not Available

2010-04-01T23:59:59.000Z

116

High-efficiency silicon concentrator cell commercialization  

SciTech Connect (OSTI)

This report summarizes the first phase of a forty-one month program to develop a commercial, high-efficiency concentrator solar cell and facility for manufacturing it. The period covered is November 1, 1990 to December 31, 1991. This is a joint program between the Electric Power Research Institute (EPRI) and Sandia National Laboratories. (This report is also published by EPRI as EPRI report number TR-102035.) During the first year of the program, SunPower accomplished the following major objectives: (1) a new solar cell fabrication facility, which is called the Cell Pilot Line (CPL), (2) a baseline concentrator cell process has been developed, and (3) a cell testing facility has been completed. Initial cell efficiencies are about 23% for the baseline process. The long-range goal is to improve this efficiency to 27%.

Sinton, R.A.; Swanson, R.M. [SunPower Corp., Sunnyvale, CA (US)

1993-05-01T23:59:59.000Z

117

Management of Trickle Irrigated Orchards for Increased Water Use Efficiency  

E-Print Network [OSTI]

Trickle irrigation is the most efficient method of irrigating peach orchards in Texas. With a trickle irrigation system, a producer may make full use of a limited or low-volume water supply to apply precise amounts of water to the root zones...

Punthakey, J. F.; McFarland, M. J.; Rodrigue, P. B.; Worthington, J. W.

118

High Efficiency Engine Technologies | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional Subject:Ground Hawaii CleanHeatinHigh Efficiency

119

How to Make Appliance Standards Work: Improving Energy and Water Efficiency Test Procedures  

E-Print Network [OSTI]

Hill. 1996. “Energy test procedures for appliances. ” EnergyWater Efficiency Test Procedures Jim Lutz, Peter Biermayer,Water Efficiency Test Procedures Jim Lutz, Peter Biermayer,

Lutz, Jim

2012-01-01T23:59:59.000Z

120

High Efficiency Colloidal Quantum Dot Phosphors  

SciTech Connect (OSTI)

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.

Kahen, Keith

2013-12-31T23:59:59.000Z

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


121

Grundfos HVAC OEM Efficient water hydraulics  

E-Print Network [OSTI]

Compact Hydro Block for Heat Pumps Hydraulic solution for small Heat Pump Systems p condensor Heating Future opportunities for heat pumps Grundfos Compact Hydro block Composite Design for Heat Pumps hydraulics Available today: Compact Hydro Block for integration High degree of pre-design Most important

Oak Ridge National Laboratory

122

Highly Efficient Silicon Light Emitting Diode  

E-Print Network [OSTI]

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.

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

2000-01-01T23:59:59.000Z

123

Charge Trapping in High Efficiency Alternating Copolymers: Implication...  

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

Charge Trapping in High Efficiency Alternating Copolymers: Implications in Organic Photovoltaic Device Efficiency Home > Research > ANSER Research Highlights > Charge Trapping in...

124

High Efficiency Clean Combustion Engine Designs for Gasoline...  

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

Efficiency Clean Combustion Engine Designs for Gasoline and Diesel Engines High Efficiency Clean Combustion Engine Designs for Gasoline and Diesel Engines 2009 DOE Hydrogen Program...

125

High-efficiency turquoise-blue electrophosphorescence from a...  

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

efficiency turquoise-blue electrophosphorescence from a Pt(II)-pyridyltriazolate complex in phosphine oxide host. High-efficiency turquoise-blue electrophosphorescence from a...

126

High efficiency and low roll-off blue phosphorescent organic...  

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

efficiency and low roll-off blue phosphorescent organic light-emitting devices using mixed host architecture. High efficiency and low roll-off blue phosphorescent organic...

127

Advanced High Efficiency Clean Diesel Combustion with Low Cost...  

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

Efficiency Clean Diesel Combustion with Low Cost for Hybrid Engines Advanced High Efficiency Clean Diesel Combustion with Low Cost for Hybrid Engines Clean, in-cylinder combustion...

128

FORSCOM installation characterization and ranking for water efficiency improvement  

SciTech Connect (OSTI)

On March 11, 1994, President Clinton signed Executive Order 12902-Energy Efficiency and Water Conservation at Federal Facilities. Section 302 of the Executive Order calls for energy and water prioritization surveys of federal facilities to be conducted. The surveys will be used to establish priorities for conducting comprehensive facility audits. In response to the requirements of the Executive Order, the U.S. Army Forces Command (FORSCOM) has tasked Pacific Northwest Laboratory (PNL) to initiate a broad study of the water savings potential at each of its major installations. This report provides an assessment of the water, sewer, energy (for hot water production and pumping), and associated cost savings potential at ten of the major FORSCOM installations. This assessment is meant to be a {open_quotes}first pass{close_quotes} estimate of the water savings potential, to assist FORSCOM in prioritizing installations for detailed water audits and potential water efficient retrofits. In addition, the end uses (toilets, sinks, showerheads, irrigation, etc.) with the greatest water savings potential are identified at each installation. This report is organized in the following manner. Following this Introduction, Section 2 provides important background information pertaining to the water analysis. Section 3 describes the methodology employed in the analysis, and Section 4 summarizes the study results. Section 5 prioritizes the installations based on both water/sewer savings and cost associated with water, sewer, and energy savings. Section 6 provides recommendations on where to start detailed water audits, as well as other recommendations. References are listed in Section 7. The appendices provide specific information on the analysis results and methodology, along with a discussion of special issues.

Fitzpatrick, Q.K.; McMordie, K.L.; Di Massa, F.V. [and others

1995-05-01T23:59:59.000Z

129

High Efficiency Low Emission Refrigeration System  

Energy Savers [EERE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of Inspector General Office0-72.pdfGeorge Waldmann GeorgeLogging| DepartmentScience EducationHeyHigh Efficiency

130

High Efficiency Cold Climate Heat Pump  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional Subject:Ground Hawaii CleanHeatinHigh Efficiency Cold Climate

131

High-efficiency concentrator silicon solar cells  

SciTech Connect (OSTI)

This report presents results from extensive process development in high-efficiency Si solar cells. An advanced design for a 1.56-cm{sup 2} cell with front grids achieved 26% efficiency at 90 suns. This is especially significant since this cell does not require a prismatic cover glass. New designs for simplified backside-contact solar cells were advanced from a status of near-nonfunctionality to demonstrated 21--22% for one-sun cells in sizes up to 37.5 cm{sup 2}. An efficiency of 26% was achieved for similar 0.64-cm{sup 2} concentrator cells at 150 suns. More fundamental work on dopant-diffused regions is also presented here. The recombination vs. various process and physical parameters was studied in detail for boron and phosphorous diffusions. Emitter-design studies based solidly upon these new data indicate the performance vs design parameters for a variety of the cases of most interest to solar cell designers. Extractions of p-type bandgap narrowing and the surface recombination for p- and n-type regions from these studies have a generality that extends beyond solar cells into basic device modeling. 68 refs., 50 figs.

Sinton, R.A.; Cuevas, A.; King, R.R.; Swanson, R.M. (Stanford Univ., CA (USA). Solid-State Electronics Lab.)

1990-11-01T23:59:59.000Z

132

High Efficiency, Illumination Quality OLEDs for Lighting  

SciTech Connect (OSTI)

The goal of the program was to demonstrate a 45 lumen per watt white light device based upon the use of multiple emission colors through the use of solution processing. This performance level is a dramatic extension of the team's previous 15 LPW large area illumination device. The fundamental material system was based upon commercial polymer materials. The team was largely able to achieve these goals, and was able to deliver to DOE a 90 lumen illumination source that had an average performance of 34 LPW a 1000 cd/m{sup 2} with peak performances near 40LPW. The average color temperature is 3200K and the calculated CRI 85. The device operated at a brightness of approximately 1000cd/m{sup 2}. The use of multiple emission colors particularly red and blue, provided additional degrees of design flexibility in achieving white light, but also required the use of a multilayered structure to separate the different recombination zones and prevent interconversion of blue emission to red emission. The use of commercial materials had the advantage that improvements by the chemical manufacturers in charge transport efficiency, operating life and material purity could be rapidly incorporated without the expenditure of additional effort. The program was designed to take maximum advantage of the known characteristics of these material and proceeded in seven steps. (1) Identify the most promising materials, (2) assemble them into multi-layer structures to control excitation and transport within the OLED, (3) identify materials development needs that would optimize performance within multilayer structures, (4) build a prototype that demonstrates the potential entitlement of the novel multilayer OLED architecture (5) integrate all of the developments to find the single best materials set to implement the novel multilayer architecture, (6) further optimize the best materials set, (7) make a large area high illumination quality white OLED. A photo of the final deliverable is shown. In 2003, a large area, OLED based illumination source was demonstrated that could provide light with a quality, quantity, and efficiency on par with what can be achieved with traditional light sources. The demonstration source was made by tiling together 16 separate 6-inch x 6-inch blue-emitting OLEDs. The efficiency, total lumen output, and lifetime of the OLED based illumination source were the same as what would be achieved with an 80 watt incandescent bulb. The devices had an average efficacy of 15 LPW and used solution-processed OLEDs. The individual 6-inch x 6-inch devices incorporated three technology strategies developed specifically for OLED lighting -- downconversion for white light generation, scattering for outcoupling efficiency enhancement, and a scalable monolithic series architecture to enable large area devices. The downconversion approach consists of optically coupling a blue-emitting OLED to a set of luminescent layers. The layers are chosen to absorb the blue OLED emission and then luminescence with high efficiency at longer wavelengths. The composition and number of layers are chosen so that the unabsorbed blue emission and the longer wavelength re-emission combine to make white light. A downconversion approach has the advantage of allowing a wide variety of colors to be made from a limited set of blue emitters. In addition, one does not have to carefully tune the emission wavelength of the individual electro-luminescent species within the OLED device in order to achieve white light. The downconversion architecture used to develop the 15LPW large area light source consisted of a polymer-based blue-emitting OLED and three downconversion layers. Two of the layers utilized perylene based dyes from BASF AG of Germany with high quantum efficiency (>98%) and one of the layers consisted of inorganic phosphor particles (Y(Gd)AG:Ce) with a quantum efficiency of {approx}85%. By independently varying the optical density of the downconversion layers, the overall emission spectrum could be adjusted to maximize performance for lighting (e.g. blackbody temp

Joseph Shiang; James Cella; Kelly Chichak; Anil Duggal; Kevin Janora; Chris Heller; Gautam Parthasarathy; Jeffery Youmans; Joseph Shiang

2008-03-31T23:59:59.000Z

133

Energy Use and Irrigation Scheduling for Efficient Water Use  

E-Print Network [OSTI]

. Agricultural Water Management 96 (2009) 1698-1704. Piccinni, G., J. Ko, T. Marek and D. Leskovar. 2009. Crop coefficients specific to multiple phenological stages for evapotranspiration?based irrigation management of onion and spinach. Hort. Science 44... COLLEGE OF AGRICULTURE AND LIFE SCIENCES TR-393 2010 Energy Use and Irrigation Scheduling for Efficient Water Use By Thomas Marek, P.E. Senior Research Engineer Texas AgriLife Research Amarillo, Texas and Dr...

Marek, Thomas; Porter, Dana

134

HIGH EFFICIENCY GENERATION OF HYDROGEN FUELS USING NUCLEAR POWER  

SciTech Connect (OSTI)

OAK B202 HIGH EFFICIENCY GENERATION OF HYDROGEN FUELS USING NUCLEAR POWER. Combustion of fossil fuels, used to power transportation, generate electricity, heat homes and fuel industry provides 86% of the world's energy. Drawbacks to fossil fuel utilization include limited supply, pollution, and carbon dioxide emissions. Carbon dioxide emissions, thought to be responsible for global warming, are now the subject of international treaties. Together, these drawbacks argue for the replacement of fossil fuels with a less-polluting potentially renewable primary energy such as nuclear energy. Conventional nuclear plants readily generate electric power but fossil fuels are firmly entrenched in the transportation sector. Hydrogen is an environmentally attractive transportation fuel that has the potential to displace fossil fuels. Hydrogen will be particularly advantageous when coupled with fuel cells. Fuel cells have higher efficiency than conventional battery/internal combustion engine combinations and do not produce nitrogen oxides during low-temperature operation. Contemporary hydrogen production is primarily based on fossil fuels and most specifically on natural gas. When hydrogen is produced using energy derived from fossil fuels, there is little or no environmental advantage. There is currently no large scale, cost-effective, environmentally attractive hydrogen production process available for commercialization, nor has such a process been identified. The objective of this work is to find an economically feasible process for the production of hydrogen, by nuclear means, using an advanced high-temperature nuclear reactor as the primary energy source. Hydrogen production by thermochemical water-splitting (Appendix A), a chemical process that accomplishes the decomposition of water into hydrogen and oxygen using only heat or, in the case of a hybrid thermochemical process, by a combination of heat and electrolysis, could meet these goals. Hydrogen produced from fossil fuels has trace contaminants (primarily carbon monoxide) that are detrimental to precious metal catalyzed fuel cells, as is now recognized by many of the world's largest automobile companies. Thermochemical hydrogen will not contain carbon monoxide as an impurity at any level. Electrolysis, the alternative process for producing hydrogen using nuclear energy, suffers from thermodynamic inefficiencies in both the production of electricity and in electrolytic parts of the process. The efficiency of electrolysis (electricity to hydrogen) is currently about 80%. Electric power generation efficiency would have to exceed 65% (thermal to electrical) for the combined efficiency to exceed the 52% (thermal to hydrogen) calculated for one thermochemical cycle. Thermochemical water-splitting cycles have been studied, at various levels of effort, for the past 35 years. They were extensively studied in the late 70s and early 80s but have received little attention in the past 10 years, particularly in the U.S. While there is no question about the technical feasibility and the potential for high efficiency, cycles with proven low cost and high efficiency have yet to be developed commercially. Over 100 cycles have been proposed, but substantial research has been executed on only a few. This report describes work accomplished during a three-year project whose objective is to ''define an economically feasible concept for production of hydrogen, by nuclear means, using an advanced high temperature nuclear reactor as the energy source.'' The emphasis of the first phase was to evaluate thermochemical processes which offer the potential for efficient, cost-effective, large-scale production of hydrogen from water in which the primary energy input is high temperature heat from an advanced nuclear reactor and to select one (or, at most three) for further detailed consideration. During Phase 1, an exhaustive literature search was performed to locate all cycles previously proposed. The cycles located were screened using objective criteria to determine which could benefit, in terms of efficien

BROWN,LC; BESENBRUCH,GE; LENTSCH,RD; SCHULTZ,KR; FUNK,JF; PICKARD,PS; MARSHALL,AC; SHOWALTER,SK

2003-06-01T23:59:59.000Z

135

Large Plate Lysimeter Efficiency for Collecting Water Transported from Soil to Ground Water  

SciTech Connect (OSTI)

A large, zero-tension, plate lysimeter (3.05 x 2.13 m) was installed to intercept percolating soil water at Bikini Atoll (11 35'N, 165 25'E), a former nuclear test-site. In two experiments controlled amounts of irrigation water were applied over the lysimeter and leachate water was collected. Evapotranspiration (ET) calculations were made using the Penman-Monteith equation and climate data collected at the atoll. The efficiency of the lysimeter was essentially 100% in contrast to low efficiencies reported for smaller plate lysimeters. Lysimeter design, installation, and water balance results are discussed.

Robison, W; Stone, E L; Hamilton, T

2004-04-14T23:59:59.000Z

136

WATER TRANSPORT IN VESSELLESS ANGIOSPERMS: CONDUCTING EFFICIENCY AND CAVITATION SAFETY  

E-Print Network [OSTI]

WATER TRANSPORT IN VESSELLESS ANGIOSPERMS: CONDUCTING EFFICIENCY AND CAVITATION SAFETY U. G. Hacke. Second, vesselless wood ought to be exceptionally safe from cavitation if the small cumulative area woods averaged a cavitation pressure of Ã?3:4 6 0:3 MPa, which is low for their wet habitats

Hacke, Uwe

137

Highly Efficient Silicon Light Emitting Diode  

E-Print Network [OSTI]

silicon light-emitting diodes (LED) that efficiently emit photons with energy around the silicon bandgap

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

2000-01-01T23:59:59.000Z

138

High-Efficiency Receivers for Supercritical Carbon Dioxide Cycles...  

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

More Documents & Publications High-Efficiency Low-Cost Solar Receiver for Use in a Supercritical CO2 Recompression Cycle - FY13 Q1 High-Efficiency Receivers for Supercritical...

139

A University Consortium on Efficient and Clean High-Pressure...  

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

Efficient and Clean High-Pressure, Lean Burn (HPLB) Engines A University Consortium on Efficient and Clean High-Pressure, Lean Burn (HPLB) Engines 2010 DOE Vehicle Technologies and...

140

Vehicle Technologies Office Merit Review 2014: High Efficiency...  

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

High Efficiency Clean Combustion in Multi-Cylinder Light-Duty Engines Vehicle Technologies Office Merit Review 2014: High Efficiency Clean Combustion in Multi-Cylinder Light-Duty...

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


141

High efficiency carbonate fuel cell/turbine hybrid power cycle  

SciTech Connect (OSTI)

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.

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

142

High Efficiency Organic Light Emitting Devices for Lighting  

SciTech Connect (OSTI)

Incorporate internal scattering layers and microlens arrays in high efficiency OLED to achieve up to 70% EQE.

So, Franky; Tansu, Nelson; Gilchrist, James

2013-06-30T23:59:59.000Z

143

Simulation of High Efficiency Clean Combustion Engines and Detailed...  

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

ongoing work exploring fuel chemistry, analysis of and improving simulation methodologies for high efficiency clean combustion regimes, and computational performance...

144

White LED with High Package Extraction Efficiency  

SciTech Connect (OSTI)

The goal of this project is to develop a high efficiency phosphor converting (white) Light Emitting Diode (pcLED) 1-Watt package through an increase in package extraction efficiency. A transparent/translucent monolithic phosphor is proposed to replace the powdered phosphor to reduce the scattering caused by phosphor particles. Additionally, a multi-layer thin film selectively reflecting filter is proposed between blue LED die and phosphor layer to recover inward yellow emission. At the end of the project we expect to recycle approximately 50% of the unrecovered backward light in current package construction, and develop a pcLED device with 80 lm/W{sub e} using our technology improvements and commercially available chip/package source. The success of the project will benefit luminous efficacy of white LEDs by increasing package extraction efficiency. In most phosphor-converting white LEDs, the white color is obtained by combining a blue LED die (or chip) with a powdered phosphor layer. The phosphor partially absorbs the blue light from the LED die and converts it into a broad green-yellow emission. The mixture of the transmitted blue light and green-yellow light emerging gives white light. There are two major drawbacks for current pcLEDs in terms of package extraction efficiency. The first is light scattering caused by phosphor particles. When the blue photons from the chip strike the phosphor particles, some blue light will be scattered by phosphor particles. Converted yellow emission photons are also scattered. A portion of scattered light is in the backward direction toward the die. The amount of this backward light varies and depends in part on the particle size of phosphors. The other drawback is that yellow emission from phosphor powders is isotropic. Although some backward light can be recovered by the reflector in current LED packages, there is still a portion of backward light that will be absorbed inside the package and further converted to heat. Heat generated in the package may cause a deterioration of encapsulant materials, affecting the performance of both the LED die and phosphor, leading to a decrease in the luminous efficacy over lifetime. Recent studies from research groups at Rensselaer Polytechnic Institute found that, under the condition to obtain a white light, about 40% of the light is transmitted outward of the phosphor layer and 60% of the light is reflected inward.1,2 It is claimed that using scattered photon extraction (SPE) technique, luminous efficacy is increased by 60%. In this project, a transparent/translucent monolithic phosphor was used to replace the powdered phosphor layer. In the normal pcLED package, the powdered phosphor is mixed with silicone either to be deposited on the top of LED die forming a chip level conversion (CLC) white LED or to be casted in the package forming a volume conversion white LED. In the monolithic phosphors there are no phosphor powder/silicone interfaces so it can reduce the light scattering caused by phosphor particles. Additionally, a multi-layer thin film selectively reflecting filter is inserted in the white LED package between the blue LED die and phosphor layer. It will selectively transmit the blue light from the LED die and reflect the phosphor's yellow inward emission outward. The two technologies try to recover backward light to the outward direction in the pcLED package thereby improving the package extraction efficiency.

Yi Zheng; Matthew Stough

2008-09-30T23:59:59.000Z

145

Tailored Materials for High Efficiency CIDI Engines  

SciTech Connect (OSTI)

The overall goal of the project, Tailored Materials for High Efficiency Compression Ignition Direct Injection (CIDI) Engines, is to enable the implementation of new combustion strategies, such as homogeneous charge compression ignition (HCCI), that have the potential to significantly increase the energy efficiency of current diesel engines and decrease fuel consumption and environmental emissions. These strategies, however, are increasing the demands on conventional engine materials, either from increases in peak cylinder pressure (PCP) or from increases in the temperature of operation. The specific objective of this project is to investigate the application of a new material processing technology, friction stir processing (FSP), to improve the thermal and mechanical properties of engine components. The concept is to modify the surfaces of conventional, low-cost engine materials. The project focused primarily on FSP in aluminum materials that are compositional analogs to the typical piston and head alloys seen in small- to mid-sized CIDI engines. Investigations have been primarily of two types over the duration of this project: (1) FSP of a cast hypoeutectic Al-Si-Mg (A356/357) alloy with no introduction of any new components, and (2) FSP of Al-Cu-Ni alloys (Alloy 339) by physically stirring-in various quantities of carbon nanotubes/nanofibers or carbon fibers. Experimental work to date on aluminum systems has shown significant increases in fatigue lifetime and stress-level performance in aluminum-silicon alloys using friction processing alone, but work to demonstrate the addition of carbon nanotubes and fibers into aluminum substrates has shown mixed results due primarily to the difficulty in achieving porosity-free, homogeneous distributions of the particulate. A limited effort to understand the effects of FSP on steel materials was also undertaken during the course of this project. Processed regions were created in high-strength, low-alloyed steels up to 0.5 in. deep that showed significant grain refinement and homogeneous microstructures favorable to increased fracture toughness and fatigue performance. The final tasks of the project demonstrated that the FSP concept can be applied to a relevant part geometry by fabricating diesel piston crowns with FSP regions applied selectively to the edge of the bowl rim. This area of the piston typically suffers from conditions at high PCP that cause severe thermal fatigue issues. It is expected that, given the data from coupon testing, the durability of pistons modified by FSP will allow much higher fatigue lifetime and potentially also greater resistance to elevated stress-level effects on fatigue.

Grant, G.J.; Jana, S.

2012-03-30T23:59:59.000Z

146

Graphene-Polypyrrole Nanocomposite as a Highly Efficient and...  

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

Graphene-Polypyrrole Nanocomposite as a Highly Efficient and Low Cost Electrically Switched Ion Exchanger for Removing ClO4- Graphene-Polypyrrole Nanocomposite as a Highly...

147

Technology and System Level Demonstration of Highly Efficient...  

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

Merit Review 2014: Technology and System Level Demonstration of Highly Efficient and Clean, Diesel Powered Class 8 Trucks Technology and System Level Demonstration of Highly...

148

High SO2 Removal Efficiency Testing  

SciTech Connect (OSTI)

This document provides a discussion of the technical progress on DOE/PETC project number DE-AC22-92PC91338, "High Efficiency SO2 Removal Testing", for the time period 1 January through 31 March 1997. The project involves testing at six full-scale utility flue gas desulfurization (FGD) systems, to evaluate low capital cost upgrades that may allow these systems to achieve up to 98% SO2 removal efficiency. The upgrades being evaluated mostly involve using performance additives in the FGD systems. The "base" project involved testing at the Tampa Electric Company?s Big Bend Station. All five potential options to the base program have been exercised by DOE, involving testing at Hoosier Energy?s Merom Station (Option I), Southwestern Electric Power Company?s Pirkey Station (Option II), PSI Energy?s Gibson Station (Option III), Duquesne Light?s Elrama Station (Option IV), and New York State Electric and Gas Corporation?s (NYSEG) Kintigh Station (Option V). The originally planned testing has been completed for all six sites. However, additional testing is planned at the Big Bend Station. The remainder of this document is divided into four sections. Section 2, Project Summary, provides a brief overview of the status of technical efforts on this project. Section 3, Results, summarizes the outcome from technical efforts during the quarter, or results from prior quarters that have not been previously reported. In Section 4, Plans for the Next Reporting Period, an overview is provided of the technical efforts that are anticipated for the second quarter of calendar year 1997. Section 5 contains a brief acknowledgement.

Gary Blythe

1997-04-23T23:59:59.000Z

149

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

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

Volvo; multi-zone cycle simulation, OpenFOAM model development Bosch; High Performance Computing of HCCISI transition Delphi; direct injection GE Research; new...

150

In-Plant Testing of High-Efficiency Hydraulic Separators  

SciTech Connect (OSTI)

Hydraulic separators are commonly used for particle size classification and gravity concentration of minerals and coal. Unfortunately, the efficiency of these processes can be quite low due to poor equipment design and variations in feed consistency. To help alleviate these problems, an industry-driven R&D program has been undertaken to develop a new generation of hydraulic separators that are more efficient and less costly to operate and maintain. These units, which are commercially called the CrossFlow separator and HydroFloat separator, have the potential to improve performance (separation efficiency and throughput) and reduce operating costs (power consumption, water and reagent usage). In Phase I of this project, laboratory and pilot-scale test units were evaluated at various industrial sites in both the coal and mineral industries. Based on promising results obtained from Phase I, full-scale prototypes were purchased and installed by a major U.S. phosphate producer and a large eastern U.S. coal company. The test data obtained from these sites demonstrate that significant performance improvements can be realized through the application of these high-efficiency separators.

G. H. Luttrell; R. Q. Honaker; R. C. Bratton; T. C. Westerfield; J. N. Kohmuench

2006-06-30T23:59:59.000Z

151

IN-PLANT TESTING OF HIGH-EFFICIENCY HYDRAULIC SEPARATORS  

SciTech Connect (OSTI)

Hydraulic separators are commonly used for particle size classification and gravity concentration of minerals and coal. Unfortunately, the efficiency of these processes can be quite low due to poor equipment design and variations in feed consistency. To help alleviate these problems, an industry-driven R&D program has been undertaken to develop a new generation of hydraulic separators that are more efficient and less costly to operate and maintain. These units, which are commercially called the CrossFlow separator and HydroFloat separator, have the potential to improve performance (separation efficiency and throughput) and reduce operating costs (power consumption, water and reagent usage). In Phase I of this project, laboratory and pilot-scale test units were evaluated at various industrial sites in both the coal and mineral industries. Based on promising results obtained from Phase I, full-scale prototypes were purchased and installed by a major U.S. phosphate producer and a large eastern U.S. coal company. The test data obtained from these sites demonstrate that significant performance improvements can be realized through the application of these high-efficiency separators.

G.H. Luttrell; R.Q. Honaker; R.C. Bratton; T.C. Westerfield; J.N. Kohmuench

2006-05-22T23:59:59.000Z

152

MIXED PHASE COMPRESSION HIGH EFFICIENCY HEAT PUMP.  

E-Print Network [OSTI]

??The objective of this thesis is the design and realization of a higher efficiency air source heat pump. The improved pump???s operating cost must rival… (more)

Chan, WenYen

2014-01-01T23:59:59.000Z

153

High Efficiency Organic Multilayer Photodetectors based on Singlet Fission ....................................................................................................................................................................................  

E-Print Network [OSTI]

.........................................................................................................................PH.14 High-efficiency, Low-cost Photovoltaics using III-V on Silicon Tandem CellsPhotonics High Efficiency Organic Multilayer Photodetectors based on Singlet Fission.........................................................................................................................PH.2 Efficiently Coupling Light to Superconducting Nanowire Single-photon Detectors

Reif, Rafael

154

How to Make Appliance Standards Work: Improving Energy and Water Efficiency Test Procedures  

E-Print Network [OSTI]

efficiency of commercial water heaters and hot water supplyheat pump water heaters). http://edocket.access.gpo.gov/2004/CSA 4.3- 2004 Gas Water Heaters - Volume III, Storage

Lutz, Jim

2012-01-01T23:59:59.000Z

155

Design of high efficiency Mid IR QCL lasers  

E-Print Network [OSTI]

The proposed research is a study of designing high-efficiency Mid-IR quantum cascade lasers (QCL). This thesis explores "injector-less" designs for achieving lower voltage defects and improving wall plug efficiencies through ...

Hsu, Allen Long

2008-01-01T23:59:59.000Z

156

Case Studies of High Efficiency Electric Motor Applicability  

E-Print Network [OSTI]

Much has been written about the advantages and disadvantages of high efficiency electric motors. For a given motor application it is possible to find literature that enables a plant engineer to make an informed choice between a standard efficiency...

Wagner, J. R.

157

High efficiency pulse motor drive for robotic propulsion  

E-Print Network [OSTI]

The goal of this research is to improve the power efficiency of robotic locomotion through the use of series elastic actuation, with a focus on swimming motion. To achieve high efficiency, electromechanical drives need to ...

Sun, Zhen, M.S. Massachusetts Institute of Technology

2013-01-01T23:59:59.000Z

158

High efficiency quasi-monochromatic infrared emitter  

SciTech Connect (OSTI)

Incandescent radiation sources are widely used as mid-infrared emitters owing to the lack of alternative for compact and low cost sources. A drawback of miniature hot systems such as membranes is their low efficiency, e.g., for battery powered systems. For targeted narrow-band applications such as gas spectroscopy, the efficiency is even lower. In this paper, we introduce design rules valid for very generic membranes demonstrating that their energy efficiency for use as incandescent infrared sources can be increased by two orders of magnitude.

Brucoli, Giovanni; Besbes, Mondher; Benisty, Henri, E-mail: henri.benisty@institutoptique.fr; Greffet, Jean-Jacques [Laboratoire Charles Fabry, UMR 8501, Institut d’Optique, CNRS, Université Paris-Sud 11, 2, Avenue Augustin Fresnel, 91127 Palaiseau Cedex (France); Bouchon, Patrick; Haïdar, Riad [Office National d’Études et de Recherches Aérospatiales, Chemin de la Hunière, 91761 Palaiseau (France)

2014-02-24T23:59:59.000Z

159

DOE ZERH Webinar: Efficient Hot Water Distribution II: How to Get it Right  

Broader source: Energy.gov [DOE]

Zero Energy Ready Homes include critical systems to ensure both energy efficiency and performance.  Hot water distribution is one of these critical systems – affecting energy use , water...

160

DOE ZERH Webinar: Efficient Hot Water Distribution I: What's at Stake  

Broader source: Energy.gov [DOE]

Zero Energy Ready Homes include critical systems to ensure both energy efficiency and performance.  Hot water distribution is one of these critical systems – affecting energy use , water...

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


161

Analysis of highly-efficient electric residential HPWHs  

SciTech Connect (OSTI)

A scoping level analysis was conducted to identify electric HPWH concepts that have the potential to achieve or exceed 30% source energy savings compared to a gas tankless water heater (GTWH) representative of the type represented in version 0.9.5.2 beta of the BEopt software developed by the National Renewable Energy Laboratory. The analysis was limited to evaluation of options to improve the energy efficiency of electric HPWH product designs currently on the market in the US. The report first defines the baseline GTWH system and determines its efficiency (source-energy-based adjusted or derated EF of ~0.71). High efficiency components (compressors, pumps, fans, heat exchangers, etc.) were identified and applied to current US HPWH products and analyzed to determine the viability of reaching the target EF. The target site-based energy factor (EF) required for an electric HPWH necessary to provide 30% source energy savings compared to the GTWH baseline unit is then determined to be ~3.19.

Baxter, Van D [ORNL; Murphy, Richard W [ORNL; Rice, C Keith [ORNL; Shen, Bo [ORNL; Gao, Zhiming [ORNL

2011-09-01T23:59:59.000Z

162

What Have You Done to Ensure Your Water Pipes are Efficient and...  

Energy Savers [EERE]

What Have You Done to Ensure Your Water Pipes are Efficient and Safe? What Have You Done to Ensure Your Water Pipes are Efficient and Safe? March 17, 2011 - 7:30am Addthis This...

163

Comment submitted by the Alliance for Water Efficiency (AWE) regarding the Energy Star Verification Testing Program  

Broader source: Energy.gov [DOE]

This document is a comment submitted by the Alliance for Water Efficiency (AWE) regarding the Energy Star Verification Testing Program

164

High-Temperature Water Splitting | Department of Energy  

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

Temperature Water Splitting High-Temperature Water Splitting High-temperature water splitting (a "thermochemical" process) is a long-term technology in the early stages of...

165

Recent Progress in the Development of High Efficiency Thermoelectrics...  

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

More Documents & Publications High-Efficiency Quantum-Well Thermoelectrics for Waste Heat Power Generation Quantum Well Thermoelectrics and Waste Heat Recovery Scale Up of Si...

166

Materials-Enabled High-Efficiency Diesel Engines (CRADA with...  

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

Engines (CRADA with Caterpillar) Materials-Enabled High-Efficiency Diesel Engines (CRADA with Caterpillar) 2009 DOE Hydrogen Program and Vehicle Technologies Program Annual Merit...

167

Project Profile: Development and Productization of High-Efficiency...  

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

Low-Cost Building-Integrated PV Shingles Using Monocrystalline Silicon Thin-Film Solar Cells Project Profile: Development and Productization of High-Efficiency, Low-Cost...

168

Energy Savings Potential and Opportunities for High-Efficiency...  

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

sponsored this assignment and provided comments on draft versions of the report. iii Energy Savings Potential and Opportunities for High-Efficiency Electric Motors in Residential...

169

Advanced CFD Models for High Efficiency Compression Ignition...  

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

for high efficiency compression-ignition engines can be used to show how turbulence-chemistry interactions influence autoignition and combustion. p-19raja.pdf More Documents &...

170

advanced high efficiency: Topics by E-print Network  

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

to 100 devices, including memory and logic. Josephson junctions are widely used in superconduct- ing quantum Nadgorny, Boris 65 Design of Efficient Java Communications for High...

171

Field Demonstration of High Efficiency Ultra-Low-Temperature...  

Energy Savers [EERE]

Field Demonstration of High Efficiency Gas Heaters Comparison of Real World Energy Consumption to Models and DOE Test Procedures Building Science "Power Words"...

172

Evaluation of High Efficiency Clean Combustion (HECC) Strategies...  

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

Combustion (HECC) Strategies for Meeting Future Emissions Regulations in Light-Duty Engines Evaluation of High Efficiency Clean Combustion (HECC) Strategies for Meeting Future...

173

High Efficiency Engine Systems Development and Evaluation | Department...  

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

High Efficiency Engine Systems Development and Evaluation 2011 DOE Hydrogen and Fuel Cells Program, and Vehicle Technologies Program Annual Merit Review and Peer Evaluation...

174

Screw pumps provide high efficiency in transport of Orinoco bitumen  

SciTech Connect (OSTI)

One of the world`s largest known deposits of extra natural bitumen is located in the Orinoco River basin of eastern Venezuela. Production and transportation of an emulsion of bitumen and water is one of the major projects being directed by Petroleos de Venezuela S.A. This paper reviews the pump selection options considered in transporting this bitumen to a viable processing facility. The three pump types evaluated were centrifugal, reciprocating, or rotary screw. Performance and cost parameters are evaluated and the screw pump was determined to be the most economical, high performance choice. The paper goes on to describe the installation of the main transport lines and efficiency of these new pumps.

Brennan, J.R. [IMO Industries, Inc., Monroe, NC (United States)

1995-03-01T23:59:59.000Z

175

High Efficiency Fuel Reactivity Controlled Compression Ignition...  

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

0.1 0.2 0.3 0.4 0.5 0.6 PM gbhp-hr NOx gbhp-hr 1988 1991 2004 2007 2010 * SI gasoline engine with 3-Way Catalyst: Thermal Efficiency 30% * Diesel engines are the most...

176

Achieving Water Use Efficiency in Irrigation Districts Ronald C. Griffin1  

E-Print Network [OSTI]

policy. Introduction Rising water scarcity in the western United States has spotlighted irrigationAchieving Water Use Efficiency in Irrigation Districts Ronald C. Griffin1 Abstract: Irrigation districts are challenging places to achieve efficient water use when the ultimate water users do

Griffin, Ronald

177

Experimental study of a high efficiency gyrotron oscillator  

E-Print Network [OSTI]

High power, high frequency gyrotrons used in plasma heating must achieve the highest possible efficiency in order to reduce system size and cost and to minimize thermal and mechanical problems. This thesis presents an ...

Choi, Eunmi, Ph. D. Massachusetts Institute of Technology

2007-01-01T23:59:59.000Z

178

Climate Change: High Water Impacts and Adaptation  

E-Print Network [OSTI]

Climate Change: High Water Impacts and Adaptation David S. Liebl and Kenneth W. Potter Co of global climate change­ WICCI Stormwater Working Group #12;Projected Climate Change 200-2100 What Global

Sheridan, Jennifer

179

High Efficiency, Low Emissions Homogeneous Charge Compression Ignition (HCCI) Engines  

SciTech Connect (OSTI)

This is the final report of the High Efficiency Clean Combustion (HECC) Research Program for the U.S. Department of Energy. Work under this co-funded program began in August 2005 and finished in July 2010. The objective of this program was to develop and demonstrate a low emission, high thermal efficiency engine system that met 2010 EPA heavy-duty on-highway truck emissions requirements (0.2g/bhp-hr NOx, 0.14g/bhp-hr HC and 0.01g/bhp-hr PM) with a thermal efficiency of 46%. To achieve this goal, development of diesel homogenous charge compression ignition (HCCI) combustion was the chosen approach. This report summarizes the development of diesel HCCI combustion and associated enabling technologies that occurred during the HECC program between August 2005 and July 2010. This program showed that although diesel HCCI with conventional US diesel fuel was not a feasible means to achieve the program objectives, the HCCI load range could be increased with a higher volatility, lower cetane number fuel, such as gasoline, if the combustion rate could be moderated to avoid excessive cylinder pressure rise rates. Given the potential efficiency and emissions benefits, continued research of combustion with low cetane number fuels and the effects of fuel distillation are recommended. The operation of diesel HCCI was only feasible at part-load due to a limited fuel injection window. A 4% fuel consumption benefit versus conventional, low-temperature combustion was realized over the achievable operating range. Several enabling technologies were developed under this program that also benefited non-HCCI combustion. The development of a 300MPa fuel injector enabled the development of extended lifted flame combustion. A design methodology for minimizing the heat transfer to jacket water, known as precision cooling, will benefit conventional combustion engines, as well as HCCI engines. An advanced combustion control system based on cylinder pressure measurements was developed. A Well-to-wheels analysis of the energy flows in a mobile vehicle system and a 2nd Law thermodynamic analysis of the engine system were also completed under this program.

None

2011-01-31T23:59:59.000Z

180

Synthesis of Highly Efficient Flame Retardant High-Density Polyethylene Nanocomposites with Inorgano-Layered Double  

E-Print Network [OSTI]

Synthesis of Highly Efficient Flame Retardant High-Density Polyethylene Nanocomposites, Harbin 150080, P. R. China ABSTRACT: High-density polyethylene (HDPE) polymer nanocomposites containing. INTRODUCTION High density polyethylene (HDPE) has good electrical proper- ties, high stiffness, and tensile

Guo, John Zhanhu

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


181

Low Cost, High Efficiency Reversible Fuel Cell Systems  

E-Print Network [OSTI]

Low Cost, High Efficiency Reversible Fuel Cell Systems DE-FC36-99GO-10455 POC: Doug Hooker Dr Approach: System Concept Fuel Cell Subsystem Battery Subsystem Converter Electrolyzer Subsystem Inverter, -- (216) 541(216) 541--10001000 Slide 5 Approach: Challenges ·Electrolyzer Subsystem Efficiency ·Fuel Cell

182

Design Strategies for Ultra-high Efficiency Photovoltaics  

E-Print Network [OSTI]

Design Strategies for Ultra-high Efficiency Photovoltaics Thesis by Emily Cathryn Warmann, who reminds me that this is fun and interesting. iv #12;Abstract While concentrator photovoltaic cells, the over all module efficiency drops to only 34 to 36%. T

Winfree, Erik

183

DEVELOPMENT OF A HIGH EFFICIENCY, AUTOMATIC DEFROSTING REFRIGERATOR-FREEZER  

E-Print Network [OSTI]

#12;DEVELOPMENT OF A HIGH EFFICIENCY, AUTOMATIC DEFROSTING REFRIGERATOR-FREEZER Richard F. Topping-efficient refrigerator- freezer prototype involving the Department of Energy's Oak Ridge National Laboratory, Arthur D refrigerator-freezers. The resulting 16 cubic foot prototype uses significantly less energy than the most

Oak Ridge National Laboratory

184

High Efficiency Burners by Retrofit - A Simple Inexpensive Way to Improve Combustion Efficiency  

E-Print Network [OSTI]

Existing direct fired process heaters and steam boilers can have their efficiencies remarkably improved, and thus cut the fuel bill, by conversion from conventional type natural draft burners to high intensity, "forced draft" type burners...

Rogers, W. T.

1980-01-01T23:59:59.000Z

185

III-V High-Efficiency Multijunction Photovoltaics (Fact Sheet)  

SciTech Connect (OSTI)

Capabilities fact sheet that includes scope, core competencies and capabilities, and contact/web information for III-V High-Efficiency Multijunction Photovoltaics at the National Center for Photovoltaics.

Not Available

2011-06-01T23:59:59.000Z

186

Study of Highly Selective and Efficient Thiol Derivatization...  

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

derived from living cells by MS method. Citation: Xu K, YW Zhang, B Tang, J Laskin, PJ Roach, and H Chen.2010."Study of Highly Selective and Efficient Thiol Derivatization using...

187

Emerging High-Efficiency Low-Cost Solar Cell Technologies  

E-Print Network [OSTI]

. A Manufacturing Cost Analysis Relevant to Photovoltaic Cells Fabricated with IIIEmerging High-Efficiency Low-Cost Solar Cell Technologies Mike McGehee Materials Science and Engineering Center for Advanced Molecular Photovoltaics Bay Area Photovoltaic Consortium Precourt Institute

McGehee, Michael

188

Compact and highly efficient laser pump cavity  

DOE Patents [OSTI]

A new, compact, side-pumped laser pump cavity design which uses non-conventional optics for injection of laser-diode light into a laser pump chamber includes a plurality of elongated light concentration channels. In one embodiment, the light concentration channels are compound parabolic concentrators (CPC) which have very small exit apertures so that light will not escape from the pumping chamber and will be multiply reflected through the laser rod. This new design effectively traps the pump radiation inside the pump chamber that encloses the laser rod. It enables more uniform laser pumping and highly effective recycle of pump radiation, leading to significantly improved laser performance. This new design also effectively widens the acceptable radiation wavelength of the diodes, resulting in a more reliable laser performance with lower cost.

Chang, Jim J. (Dublin, CA); Bass, Isaac L. (Castro Valley, CA); Zapata, Luis E. (Livermore, CA)

1999-01-01T23:59:59.000Z

189

Feasibility study of broadband efficient ''water window'' source  

SciTech Connect (OSTI)

We demonstrate a table-top broadband emission water window source based on laser-produced high-Z plasmas. Resonance emission from multiply charged ions merges to produce intense unresolved transition arrays (UTAs) in the 2-4 nm region, extending below the carbon K edge (4.37 nm). Arrays resulting from n=4-n=4 transitions are overlaid with n=4-n=5 emission and shift to shorter wavelength with increasing atomic number. An outline of a microscope design for single-shot live cell imaging is proposed based on a bismuth plasma UTA source, coupled to multilayer mirror optics.

Higashiguchi, Takeshi; Yugami, Noboru [Department of Advanced Interdisciplinary Sciences, Center for Optical Research and Education (CORE), and Optical Technology Innovation Center (OpTIC), Utsunomiya University, Yoto 7-1-2, Utsunomiya, Tochigi 321-8585 (Japan); Japan Science and Technology Agency, CREST, 4-1-8 Honcho, Kanagawa, Saitama 332-0012 (Japan); Otsuka, Takamitsu [Department of Advanced Interdisciplinary Sciences, Center for Optical Research and Education (CORE), and Optical Technology Innovation Center (OpTIC), Utsunomiya University, Yoto 7-1-2, Utsunomiya, Tochigi 321-8585 (Japan); Jiang Weihua [Department of Electrical Engineering, Nagaoka University of Technology, Kami-tomiokamachi 1603-1, Nagaoka, Niigata 940-2188 (Japan); Endo, Akira [Research Institute for Science and Engineering, Waseda University, Okubo 3-4-1, Shinjuku, Tokyo 169-8555 (Japan); Li Bowen; Dunne, Padraig; O'Sullivan, Gerry [School of Physics, University College Dublin, Belfield, Dublin 4 (Ireland)

2012-01-02T23:59:59.000Z

190

High pressure water jet mining machine  

DOE Patents [OSTI]

A high pressure water jet mining machine for the longwall mining of coal is described. The machine is generally in the shape of a plowshare and is advanced in the direction in which the coal is cut. The machine has mounted thereon a plurality of nozzle modules each containing a high pressure water jet nozzle disposed to oscillate in a particular plane. The nozzle modules are oriented to cut in vertical and horizontal planes on the leading edge of the machine and the coal so cut is cleaved off by the wedge-shaped body.

Barker, Clark R. (Rolla, MO)

1981-05-05T23:59:59.000Z

191

Webinar: ENERGY STAR Hot Water Systems for High Performance Homes...  

Energy Savers [EERE]

Webinar: ENERGY STAR Hot Water Systems for High Performance Homes Webinar: ENERGY STAR Hot Water Systems for High Performance Homes This presentation is from the Building America...

192

Loveland Water and Power- Commercial and Industrial Energy Efficiency Rebate Program  

Broader source: Energy.gov [DOE]

Loveland Water and Power, in conjunction with the Platte River Power Authority provides businesses incentives for new construction projects and existing building retrofits. The Electric Efficiency...

193

McMinnville Water and Light- Residential Energy Efficiency Rebate Program  

Broader source: Energy.gov [DOE]

McMinnville Water and Light (MWL) offers rebates on energy efficient homes, appliances and equipment to their residential customers. Rebates are valid on refrigerators, freezers, clothes washer,...

194

Efficient Hydraulic State Estimation Technique Using Reduced Models of Urban Water Networks  

E-Print Network [OSTI]

This paper describes and demonstrates an efficient method for online hydraulic state estimation in urban water networks. The proposed method employs an online predictor-corrector (PC) procedure for forecasting future water ...

Preis, Ami

195

Water Use Efficiency in Plant Growth and Ambient Carbon Dioxide Level  

E-Print Network [OSTI]

TR-42 1972 Water Use Efficiency in Plant Growth and Ambient Carbon Dioxide Level C.H. M. van Bavel Texas Water Resources Institute Texas A&M University ...

van Bavel, C. H. M.

196

Water Efficiency Improvements at Various Environmental Protection Agency Sites  

Broader source: Energy.gov [DOE]

Case study discusses the U.S. Environmental Protection Agency's (EPA) successful water conservation program, which reduced potable water use through a series of initiatives at EPA laboratories.

197

High temperature hot water systems: A primer  

SciTech Connect (OSTI)

The fundamental principles of high temperature water (HTW) system technology and its advantages for thermal energy distribution are presented. Misconceptions of this technology are also addressed. The paper describes design principles, applications, HTW properties, HTW system advantages, selecting the engineer, load diversification, design temperatures, system pressurization, pump considerations, constant vs. VS pumps, HTW generator types, and burners and controls.

Govan, F.A. [NMD and Associates, Cincinnati, OH (United States)

1998-01-01T23:59:59.000Z

198

Optimization of Water Use Efficiency Through Trickle Irrigation and the Stress Day Index  

E-Print Network [OSTI]

by water deficits occurring during the boot-to-bloom growth period. Water use efficiency was increased when water deficits were carefully managed by applying small, frequent applications of water and avoiding large deficits during the boot-to-bloom period...

Wilke, O.C.; Hiler, E. A.

199

Best Practices for Energy Efficient Cleanrooms: Control of Chilled Water System  

E-Print Network [OSTI]

supply temperatures may improve the efficiency while meeting cooling requirements for cleanroom for cleanrooms and their adjacent spaces. Chillers 39% Cooling Towers 7% Pumps 17% MUAH + RCU Fans 9% Hot Water;chilled water pumps, secondary loop chilled water pumps, condenser water pumps, and cooling towers

200

New US Ultra High Efficiency R&D Programme  

E-Print Network [OSTI]

Very high efficiency is an important characteristic of the value proposition for solar to electric conversion. High efficiency is the shortest path to cost-effective commercial applications and leads to new high value applications such as portable battery charging. The Defense Advanced Research Projects Agency has initiated the Very High Efficiency Solar Cell (VHESC) program to address the critical need of the soldier for power in the field. Very High Efficiency Solar Cells for portable applications1,2 that operate at greater than 55 percent efficiency in the laboratory and 50 percent in production are being developed. We are integrating the optical design with the solar cell design, and have entered previously unoccupied design space that leads to a new architecture paradigm. An integrated team effort is now underway that requires us to invent, develop and transfer to production these new solar cells. Our approach is driven by proven quantitative models for the solar cell design, the optical design and the integration of these designs. We start with a very high performance crystalline silicon solar cell platform. Examples will be presented. Initial solar cell device results are shown for devices fabricated in geometries designed for this VHESC Program.

Allen Barnett Douglas Kirkpatrick

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


201

High-Efficiency Nitride-Based Photonic Crystal Light Sources  

Broader source: Energy.gov [DOE]

The University of California Santa Barbara (UCSB) is maximizing the efficiency of a white LED by enhancing the external quantum efficiency using photonic crystals to extract light that would normally be confined in a conventional structure. Ultimate efficiency can only be achieved by looking at the internal structure of light. To do this, UCSB is focusing on maximizing the light extraction efficiency and total light output from light engines driven by Gallium Nitride (GaN)-based LEDs. The challenge is to engineer large overlap (interaction) between modes and photonic crystals. The project is focused on achieving high extraction efficiency in LEDs, controlled directionality of emitted light, integrated design of vertical device structure, and nanoscale patterning of lateral structure.

202

Evaluating the potential for high thermoelectric efficiency of silver selenide  

E-Print Network [OSTI]

to the exceptionally high mobility, higher than other optimized thermoelectric materials. Although zT decreases at high refrigerants.1 Increasing the efficiency of a thermoelectric material necessitates increasing the gure of merit contribution and an electronic contribution. Thermoelectric materials used in practice have zT near 1. One

Martin, Alain

203

High temperature hot water distribution system study  

SciTech Connect (OSTI)

The existing High Temperature Hot Water (HTHW) Distribution System has been plagued with design and construction deficiencies since startup of the HTHW system, in October 1988. In October 1989, after one year of service, these deficiencies were outlined in a technical evaluation. The deficiencies included flooded manholes, sump pumps not hooked up, leaking valves, contaminated HTHW water, and no cathodic protection system. This feasibility study of the High Temperature Hot Water (HTHW) Distribution System was performed under Contract No. DACA0l-94-D-0033, Delivery Order 0013, Modification 1, issued to EMC Engineers, Inc. (EMC), by the Norfolk District Corps of Engineers, on 25 April 1996. The purpose of this study was to determine the existing conditions of the High Temperature Hot Water Distribution System, manholes, and areas of containment system degradation. The study focused on two areas of concern, as follows: * Determine existing conditions and areas of containment system degradation (leaks) in the underground carrier pipes and protective conduit. * Document the condition of underground steel and concrete manholes. To document the leaks, a site survey was performed, using state-of-the-art infrared leak detection equipment and tracer gas leak detection equipment. To document the condition of the manholes, color photographs were taken of the insides of 125 manholes, and notes were made on the condition of these manholes.

NONE

1996-12-01T23:59:59.000Z

204

High Efficiency Solar Power via Separated Photo and Voltaic Pathways  

SciTech Connect (OSTI)

This project demonstrates a novel nanostructured solar cell architecture capable of achieving high efficiency levels that is relatively simple and inexpensive to manufacture. The high efficiency will be achieved by the novel structure that separates the path of the photons from the path of the generated charge carriers. In this way, the photon path can be long for maximum light absorption, while the path for carriers can be short for maximum electronic energy harvesting. The combination of maximum light absorption coupled with maximum carrier harvesting is the basis for the expected high efficiency. The project will develop high efficiency solar cell prototypes utilizing this unique nanostructured architecture. The project addresses the fundamental limitation inherent in all current solar cell designs, and which opens a pathway to development for high efficiency solar cells at low cost. Realizing this goal will result in a levelized cost of electricity in the range of 10¢/kWh, which would achieve the long-sought goal of making photovoltaic electricity cost competitive with fossil-fuel generated electricity without any governmental subsidies. This breakthrough would spur the already rapid growth in the photovoltaic industry to an explosive pace, with significant, widespread benefit to the national economy and the nation’s energy security. The initial target of the program is to develop single-junction solar cells using ultrathin amorphous silicon with the performance approaching that of single crystal silicon cells.

Michael J. Naughton

2009-02-17T23:59:59.000Z

205

High Efficiency Gas Turbines Overcome Cogeneration Project Feasibility Hurdles  

E-Print Network [OSTI]

HIGH EFFICIENCY GAS TlJR1HNES OVERCOME COGENFRATION PROJECT FEASIBILITY HURDLES JIM KING Gas Turbine Perfonumce Engineer STEVART &: STEVENSON SERVICES. INC. Houston. TelUlS ABSTRACT Cogeneration project feasibility sometimes fails... during early planning stages due to an electrical cycle efficiency which could be improved through the use of aeroderivative gas turbine engines. The aeroderivative engine offers greater degrees of freedom in terms of power augmentation through...

King, J.

206

Kieffer Paper Mill's Recycled Fiber Mill and PSI Energy's High Efficiency Motors Plan  

E-Print Network [OSTI]

efficiency would yield significant energy savings. PSI Energy was able to help Kieffer examine the economics of high efficiency motors, and through the PSI Energy High Efficiency Motors Plan encouraged Kieffer Paper Mills to purchase energy efficient motors...

Myers, J. A.

207

High Efficiency and High Rate Deposited Amorphous Silicon-Based Solar Cells  

E-Print Network [OSTI]

. Figure 3-1 IV curve of a UT fabricated triple cell, showing 12.7% initial, active-area efficiency. Figure1 High Efficiency and High Rate Deposited Amorphous Silicon-Based Solar Cells PHASE I Annual-junction a-Si Solar Cells with Heavily Doped Thin Interface Layers at the Tunnel Junctions Section 4 High

Deng, Xunming

208

High efficiency III-nitride light-emitting diodes  

DOE Patents [OSTI]

Tailored doping of barrier layers enables balancing of the radiative recombination among the multiple-quantum-wells in III-Nitride light-emitting diodes. This tailored doping enables more symmetric carrier transport and uniform carrier distribution which help to reduce electron leakage and thus reduce the efficiency droop in high-power III-Nitride LEDs. Mitigation of the efficiency droop in III-Nitride LEDs may enable the pervasive market penetration of solid-state-lighting technologies in high-power lighting and illumination.

Crawford, Mary; Koleske, Daniel; Cho, Jaehee; Zhu, Di; Noemaun, Ahmed; Schubert, Martin F; Schubert, E. Fred

2013-05-28T23:59:59.000Z

209

New Braunfels Utilities- Energy Efficiency and Water Conservation Rebate Programs  

Broader source: Energy.gov [DOE]

New Braunfels Utilities offer a variety of programs encouraging its customers to make their homes more energy efficiency. Rebates are available for washing machines, air conditioners, heat pumps,...

210

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

SciTech Connect (OSTI)

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

None

2010-10-01T23:59:59.000Z

211

THERMODYNAMIC CONSIDERATIONS FOR THERMAL WATER SPLITTING PROCESSES AND HIGH TEMPERATURE ELECTROLYSIS  

SciTech Connect (OSTI)

A general thermodynamic analysis of hydrogen production based on thermal water splitting processes is presented. Results of the analysis show that the overall efficiency of any thermal water splitting process operating between two temperature limits is proportional to the Carnot efficiency. Implications of thermodynamic efficiency limits and the impacts of loss mechanisms and operating conditions are discussed as they pertain specifically to hydrogen production based on high-temperature electrolysis. Overall system performance predictions are also presented for high-temperature electrolysis plants powered by three different advanced nuclear reactor types, over their respective operating temperature ranges.

J. E. O'Brien

2008-11-01T23:59:59.000Z

212

Ultra-high pressure water jet: Baseline report  

SciTech Connect (OSTI)

The ultra-high pressure waterjet technology was being evaluated at Florida International University (FIU) as a baseline technology. In conjunction with FIU`s evaluation of efficiency and cost, this report covers the evaluation conducted for safety and health issues. It is a commercially available technology and has been used for various projects at locations throughout the country. The ultra-high pressure waterjet technology acts as a cutting tool for the removal of surface substrates. The Husky{trademark} pump feeds water to a lance that directs the high pressure water at the surface to be removed. The safety and health evaluation during the testing demonstration focused on two main areas of exposure. These were dust and noise. The dust exposure was found to be minimal, which would be expected due to the wet environment inherent in the technology, but noise exposure was at a significant level. Further testing for noise is recommended because of the outdoor environment where the testing demonstration took place. In addition, other areas of concern found were arm-hand vibration, ergonomics, heat stress, tripping hazards, electrical hazards, lockout/tagout, fall hazards, slipping hazards, hazards associated with the high pressure water, and hazards associated with air pressure systems.

NONE

1997-07-31T23:59:59.000Z

213

Bandgap Engineering in High-Efficiency Multijunction Concentrator Cells  

SciTech Connect (OSTI)

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.

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

214

High Efficiency Clean Combustion in Multi-Cylinder Light-Duty...  

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

& Publications High-Efficiency Clean Combustion in Light-Duty Multi-Cylinder Diesel Engines High Efficiency Clean Combustion in Multi-Cylinder Light-Duty Engines High Efficiency...

215

Toward high-energy-density, high-efficiency, and moderate-temperature chip-scale thermophotovoltaics  

E-Print Network [OSTI]

The challenging problem of ultra-high-energy-density, high-efficiency, and small-scale portable power generation is addressed here using a distinctive thermophotovoltaic energy conversion mechanism and chip-based system ...

Pilawa-Podgurski, R. C. N.

216

I/O-Efficient Computation of Water Flow Across a Terrain University of Aarhus  

E-Print Network [OSTI]

of the terrain. In reality, water does collect in the terrain's basins, particularly during heavy rainfallI/O-Efficient Computation of Water Flow Across a Terrain Lars Arge MADALGO University of Aarhus. Over time, water collects in the basins of T , forming lakes that spill into ad- jacent basins. Our

Zeh, Norbert

217

DOH Form #331-376 Page 1 July 2007 Annual Water Use Efficiency  

E-Print Network [OSTI]

Summary: Total Water Produced and Purchased ­ Annual Volume 479 millions of gallons* gallons* Distribution Percent of Distribution System Leakage (DSL) Total Water Produced and Purchased (TP) AuthorizedDOH Form #331-376 Page 1 July 2007 Annual Water Use Efficiency Performance Report Form Please refer

Collins, Gary S.

218

Determination of efficiency of anechoic or decoupling hull coatings using water tank acoustic measurements  

E-Print Network [OSTI]

Determination of efficiency of anechoic or decoupling hull coatings using water tank acoustic and radiated noise, respectively. Measurement of test panels in a water tank gives only the reflection in a water tank has already been presented in a previous paper [2]. The purpose of the present paper

Paris-Sud XI, Université de

219

Basic studies of 3-5 high efficiency cell components  

SciTech Connect (OSTI)

This project's objective is to improve our understanding of the generation, recombination, and transport of carriers within III-V homo- and heterostructures. The research itself consists of fabricating and characterizing solar cell building blocks'' such as junctions and heterojunctions as well as basic measurements of material parameters. A significant effort is also being directed at characterizing loss mechanisms in high-quality, III-V solar cells fabricated in industrial research laboratories throughout the United States. The project's goal is to use our understanding of the device physics of high-efficiency cell components to maximize cell efficiency. A related goal is the demonstration of new cell structures fabricated by molecular beam epitaxy (MBE). The development of measurement techniques and characterization methodologies is also a project objective. This report describes our progress during the fifth and final year of the project. During the past five years, we've teamed a great deal about heavy doping effects in p[sup +] and n[sup +] GaAs and have explored their implications for solar cells. We have developed an understanding of the dominant recombination losses in present-day, high-efficiency cells. We've learned to appreciated the importance of recombination at the perimeter of the cell and have developed techniques for chemically passivating such edges. Finally, we've demonstrated that films grown by molecular beam epitaxy are suitable for high-efficiency cell research.

Lundstrom, M.S.; Melloch, M.R.; Pierret, R.F.; Carpenter, M.S.; Chuang, H.L.; Dodd, P.E.; Keshavarzi, A.; Klausmeier-Brown, M.E.; Lush, G.B.; Stellwag, T.B. (Purdue Univ., Lafayette, IN (United States))

1993-01-01T23:59:59.000Z

220

LOW COST, HIGH EFFICIENCY REVERSIBLE FUEL CELL SYSTEMS  

E-Print Network [OSTI]

common hydrocarbon fuels (e.g., natural gas, propane, and bio-derived fuel) as well as hydrogenLOW COST, HIGH EFFICIENCY REVERSIBLE FUEL CELL SYSTEMS Dr. Christopher E. Milliken, Materials Group Boulevard Cleveland, Ohio 44108 216-541-1000 Abstract Fuel cell technologies are described in the 2001 DOE

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


221

DOE ZERH Webinar: Efficient Hot Water Distribution I: What's...  

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

water plumbing systems including the key performance metrics to understand, and how piping, pumps, and fixtures come together to create a good (or bad) system. View the...

222

Low Cost, High Efficiency, High Pressure Hydrogen Storage  

SciTech Connect (OSTI)

A technical and design evaluation was carried out to meet DOE hydrogen fuel targets for 2010. These targets consisted of a system gravimetric capacity of 2.0 kWh/kg, a system volumetric capacity of 1.5 kWh/L and a system cost of $4/kWh. In compressed hydrogen storage systems, the vast majority of the weight and volume is associated with the hydrogen storage tank. In order to meet gravimetric targets for compressed hydrogen tanks, 10,000 psi carbon resin composites were used to provide the high strength required as well as low weight. For the 10,000 psi tanks, carbon fiber is the largest portion of their cost. Quantum Technologies is a tier one hydrogen system supplier for automotive companies around the world. Over the course of the program Quantum focused on development of technology to allow the compressed hydrogen storage tank to meet DOE goals. At the start of the program in 2004 Quantum was supplying systems with a specific energy of 1.1-1.6 kWh/kg, a volumetric capacity of 1.3 kWh/L and a cost of $73/kWh. Based on the inequities between DOE targets and Quantum’s then current capabilities, focus was placed first on cost reduction and second on weight reduction. Both of these were to be accomplished without reduction of the fuel system’s performance or reliability. Three distinct areas were investigated; optimization of composite structures, development of “smart tanks” that could monitor health of tank thus allowing for lower design safety factor, and the development of “Cool Fuel” technology to allow higher density gas to be stored, thus allowing smaller/lower pressure tanks that would hold the required fuel supply. The second phase of the project deals with three additional distinct tasks focusing on composite structure optimization, liner optimization, and metal.

Mark Leavitt

2010-03-31T23:59:59.000Z

223

Energy Efficiency Design Options for Residential Water Heaters: Economic Impacts on Consumers  

SciTech Connect (OSTI)

The U.S. Department of Energy (DOE) recently completed a rulemaking process in which it amended the existing energy efficiency standards for residential water heaters. A key factor in DOE?s consideration of new standards is the economic impacts on consumers. Determining such impacts requires a comparison of the additional first cost of energy efficiency design options with the savings in operating costs. This paper describes the method used to conduct the life-cycle cost (LCC) and payback period analysis for gas and electric storage water heaters. It presents the estimated change in LCC associated with more energy-efficient equipment, including heat pump electric water heaters and condensing gas water heaters, for a representative sample of U.S. homes. The study included a detailed accounting of installation costs for the considered design options, with a focus on approaches for accommodating the larger dimensions of more efficient water heaters. For heat pump water heaters, the study also considered airflow requirements, venting issues, and the impact of these products on the indoor environment. The results indicate that efficiency improvement relative to the baseline design reduces the LCC in the majority of homes for both gas and electric storage water heaters, and heat pump electric water heaters and condensing gas water heaters provide a lower LCC for homes with large rated volume water heaters.

Lekov, Alex; Franco, Victor; Meyers, Steve; Thompson, Lisa; Letschert, Virginie

2010-11-24T23:59:59.000Z

224

Ultra-Compact High-Efficiency Luminaire for General Illumination  

SciTech Connect (OSTI)

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.

Ted Lowes

2012-04-08T23:59:59.000Z

225

High-Efficiency Quantum-Well Thermoelectrics for Waste Heat Power...  

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

High-Efficiency Quantum-Well Thermoelectrics for Waste Heat Power Generation High-Efficiency Quantum-Well Thermoelectrics for Waste Heat Power Generation 2005 Diesel Engine...

226

Integration of High Efficiency Solar Cells on Carriers for Concentrating System Applications .  

E-Print Network [OSTI]

??High efficiency multi-junction (MJ) solar cells were packaged onto receiver systems. The efficiency change of concentrator cells under continuous high intensity illumination was done. Also,… (more)

Chow, Simon Ka Ming

2011-01-01T23:59:59.000Z

227

High-Efficiency Solar Cogeneration with TPV & Fiber-Optic Daylighting...  

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

High-Efficiency Solar Cogeneration with TPV & Fiber-Optic Daylighting High-Efficiency Solar Cogeneration with TPV & Fiber-Optic Daylighting Lead Performer: Creative Light Source,...

228

SwRI's HEDGE Technology for High Efficiency, Low Emissions Gasoline...  

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

SwRI's HEDGE Technology for High Efficiency, Low Emissions Gasoline Engines SwRI's HEDGE Technology for High Efficiency, Low Emissions Gasoline Engines Presentation given at the...

229

High Efficiency LED Lamp for Solid-State Lighting  

SciTech Connect (OSTI)

This report contains a summary of technical achievements during a three-year project to demonstrate high efficiency, solid-state lamps based on gallium nitride/silicon carbide light-emitting diodes. Novel chip designs and fabrication processes are described for a new type of nitride light-emitting diode with the potential for very high efficiency. This work resulted in the demonstration of blue light-emitting diodes in the one watt class that achieved up to 495 mW of light output at 350 mA drive current, corresponding to quantum and wall plug efficiencies of 51% and 45%, respectively. When combined with a phosphor in Cree's 7090 XLamp package, these advanced blue-emitting devices resulted in white light-emitting diodes whose efficacy exceeded 85 lumens per watt. In addition, up to 1040 lumens at greater than 85 lumens per watt was achieved by combining multiple devices to make a compact white lamp module with high optical efficiency.

James Ibbetson

2006-12-31T23:59:59.000Z

230

High Quality Down Lighting Luminaire with 73% Overall System Efficiency  

SciTech Connect (OSTI)

This report summarizes work to develop a high flux, high efficiency LED-based downlight at OSRAM SYLVANIA under US Department of Energy contract DE-FC26-08NT01582. A new high power LED and electronic driver were developed for these downlights. The LED achieved 100 lumens per watt efficacy and 1700 lumen flux output at a correlated color temperature of 3500K. The driver had 90% electrical conversion efficiency while maintaining excellent power quality with power factor >0.99, and total harmonic distortion <10%. Two styles of downlights using the LED and driver were shown to exceed the project targets for steady-state luminous efficacy and flux of 70 lumens per watt and 1300 lumens, respectively. Compared to similar existing downlights using compact fluorescent or LED sources, these downlights had much higher efficacy at nearly the same luminous flux.

Robert Harrison; Steven C. Allen; Joseph Bernier; Robert Harrison

2010-08-31T23:59:59.000Z

231

A Perspective on the Future of High Efficiency Engines  

SciTech Connect (OSTI)

New fuel economy standards and emissions regulations are accelerating the development of new engine technologies, sensors, and on-board computing. These developments will enable unprecedented engine control, which will in turn enable real-world implementations of low temperature combustion, high-speed controls, and other high efficiency engine technologies. With this expanded flexibility in engine design and control, the challenge will now be the exponential increase in the design and calibration space and the need for the development of new simulations, optimization methods, and self-learning control methodologies. This manuscript provides historical and future perspectives on the opportunities and challenges of this unparalleled technology growth on the next generation of high efficiency engines.

Wagner, Robert M [ORNL] [ORNL; Curran, Scott [ORNL] [ORNL; Green Jr, Johney Boyd [ORNL] [ORNL

2013-01-01T23:59:59.000Z

232

Efficient Use of Water in the Garden and Landscape.  

E-Print Network [OSTI]

situations: ? Growth stops ? Minerals are not absorbed ? Leaves turn yellow and remain small ? Roots begin to die A guide for young tree irrigation follows. Table 2. Average weekly water requirements in gallons per tree. April May June July August I... of clean water which flows at a rate of at least 2 to 5 gallons per minute with at least 30 to 40 pounds pressure is needed. Clean water is essential for successful drip irrigation because sand, silt, organic material and other foreign material can...

Parson, Jerry; Cotner, Sam; Roberts, Ronald

1985-01-01T23:59:59.000Z

233

Best Management Practice #4: Water-Efficient Landscaping  

Broader source: Energy.gov [DOE]

Traditional landscapes require supplemental water to thrive in most locations. Kentucky bluegrass, for example, is native to regions that receive in excess of 40 inches per year of precipitation,...

234

Energy- and Water- Efficiency in the DOE ZERH  

Broader source: Energy.gov [DOE]

Description:In recent years, challenges such as an aging infrastructure and drought have led to rapidly rising water rates and an increased focus on (sometimes strict) conservation measures. In...

235

Advanced Klystrons for High Efficiency Accelerator Systems - Final Report  

SciTech Connect (OSTI)

This program explored tailoring of RF pulses used to drive accelerator cavities. Simulations indicated that properly shaping the pulse risetime to match accelerator cavity characteristics reduced reflected power and increased total efficiency. Tailoring the pulse requires a high power, gridded, klystron to shape the risetime while also controlling the beam current. The Phase I program generated a preliminary design of a gridded electron gun for a klystron producing 5-10 MW of RF power. This required design of a segmented cathode using Controlled Porosity Reservoir cathodes to limit power deposition on the grid. The program was successful in computationally designing a gun producing a high quality electron beam with grid control. Additional analysis of pulse tailoring indicated that technique would only be useful for cavity drive pulses that were less than approximately 2-3 times the risetime. Otherwise, the efficiency gained during the risetime of the pulse became insignificant when considering the efficiency over the entire pulse. Consequently, it was determined that a Phase II program would not provide sufficient return to justify the cost. Never the less, other applications for a high power gridded gun are currently being pursued. This klystron, for example, would facilitate development inverse Comptom x-ray sources by providing a high repetition rate (10 -100 kHz) RF source.

Read, Michael; Ives, Robert Lawrence

2014-03-26T23:59:59.000Z

236

Test Program for High Efficiency Gas Turbine Exhaust Diffuser  

SciTech Connect (OSTI)

This research relates to improving the efficiency of flow in a turbine exhaust, and thus, that of the turbine and power plant. The Phase I SBIR project demonstrated the technical viability of “strutlets” to control stalls on a model diffuser strut. Strutlets are a novel flow-improving vane concept intended to improve the efficiency of flow in turbine exhausts. Strutlets can help reduce turbine back pressure, and incrementally improve turbine efficiency, increase power, and reduce greenhouse gas emmission. The long-term goal is a 0.5 percent improvement of each item, averaged over the US gas turbine fleet. The strutlets were tested in a physical scale model of a gas turbine exhaust diffuser. The test flow passage is a straight, annular diffuser with three sets of struts. At the end of Phase 1, the ability of strutlets to keep flow attached to struts was demonstrated, but the strutlet drag was too high for a net efficiency advantage. An independently sponsored followup project did develop a highly-modified low-drag strutlet. In combination with other flow improving vanes, complicance to the stated goals was demonstrated for for simple cycle power plants, and to most of the goals for combined cycle power plants using this particular exhaust geometry. Importantly, low frequency diffuser noise was reduced by 5 dB or more, compared to the baseline. Appolicability to other diffuser geometries is yet to be demonstrated.

Norris, Thomas R.

2009-12-31T23:59:59.000Z

237

High-efficiency solar cell and method for fabrication  

DOE Patents [OSTI]

A high-efficiency 3- or 4-junction solar cell is disclosed with a theoretical AM0 energy conversion efficiency of about 40%. The solar cell includes p-n junctions formed from indium gallium arsenide nitride (InGaAsN), gallium arsenide (GaAs) and indium gallium aluminum phosphide (InGaAlP) separated by n-p tunnel junctions. An optional germanium (Ge) p-n junction can be formed in the substrate upon which the other p-n junctions are grown. The bandgap energies for each p-n junction are tailored to provide substantially equal short-circuit currents for each p-n junction, thereby eliminating current bottlenecks and improving the overall energy conversion efficiency of the solar cell. Additionally, the use of an InGaAsN p-n junction overcomes super-bandgap energy losses that are present in conventional multi-junction solar cells. A method is also disclosed for fabricating the high-efficiency 3- or 4-junction solar cell by metal-organic chemical vapor deposition (MOCVD).

Hou, Hong Q. (Albuquerque, NM); Reinhardt, Kitt C. (Albuquerque, NM)

1999-01-01T23:59:59.000Z

238

High-efficiency solar cell and method for fabrication  

DOE Patents [OSTI]

A high-efficiency 3- or 4-junction solar cell is disclosed with a theoretical AM0 energy conversion efficiency of about 40%. The solar cell includes p-n junctions formed from indium gallium arsenide nitride (InGaAsN), gallium arsenide (GaAs) and indium gallium aluminum phosphide (InGaAlP) separated by n-p tunnel junctions. An optional germanium (Ge) p-n junction can be formed in the substrate upon which the other p-n junctions are grown. The bandgap energies for each p-n junction are tailored to provide substantially equal short-circuit currents for each p-n junction, thereby eliminating current bottlenecks and improving the overall energy conversion efficiency of the solar cell. Additionally, the use of an InGaAsN p-n junction overcomes super-bandgap energy losses that are present in conventional multi-junction solar cells. A method is also disclosed for fabricating the high-efficiency 3- or 4-junction solar cell by metal-organic chemical vapor deposition (MOCVD). 4 figs.

Hou, H.Q.; Reinhardt, K.C.

1999-08-31T23:59:59.000Z

239

High Water Heating Bills on Lockdown at Idaho Jail | Department...  

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

High Water Heating Bills on Lockdown at Idaho Jail High Water Heating Bills on Lockdown at Idaho Jail August 19, 2010 - 12:05pm Addthis The Blaine County Public Safety Facility...

240

High-Efficiency Solar Cell Concepts: Physics, Materials, and Devices  

SciTech Connect (OSTI)

Over the past three decades, significant progress has been made in the area of high-efficiency multijunction solar cells, with the effort primarily directed at current-matched solar cells in tandem. The key materials issues here have been obtaining semiconductors with the required bandgaps for sequential absorption of light in the solar spectrum and that are lattice matched to readily available substrates. The GaInP/GaAs/Ge cell is a striking example of success achieved in this area. Recently, several new approaches for high-efficiency solar cell design have emerged, that involve novel methods for tailoring alloy bandgaps, as well as alternate technologies for hetero-epitaxy of III-V's on Si. The advantages and difficulties expected to be encountered with each approach will be discussed, addressing both the materials issues and device physics whilst contrasting them with other fourth-generation solar cell concepts.

Mascarenhas, A.; Francoeur, S.; Seong, M. J.; Fluegel, B.; Zhang, Y.; Wanlass, M. W.

2005-01-01T23:59:59.000Z

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


241

Memphis Light, Gas and Water (Electric)- Commercial Efficiency Advice and Incentives Program  

Broader source: Energy.gov [DOE]

Memphis Light, Gas and Water (MLGW), in partnership with the Tennessee Valley Authority (TVA), offers a variety of energy efficient incentives to non-residential customers. The program provides...

242

McMinnville Water and Light- Commercial Energy Efficiency Rebate Programs  

Broader source: Energy.gov [DOE]

McMinnville Water and Light Company offers a variety of rebates for commercial and industrial customers to make energy efficient improvements to eligible facilities. MW&L offers rebates in...

243

Gibson Electric Membership Corporation- Residential Energy Efficient Water Heater Loan Program  

Broader source: Energy.gov [DOE]

Gibson Electric Membership Corporation provides loans to its residential customers to finance new, energy efficient water heaters. The loans are interest-free and can be paid off in as many as 3...

244

Tri-County Electric Cooperative- Energy Efficient Water Heater Rebate Program  

Broader source: Energy.gov [DOE]

Tri-County Electric Cooperative offers a $75 rebate on the purchase of energy-efficient electric water heaters. The rebate is valid for new or replacement units which have an Energy Factor Rating...

245

Chemical beam epitaxy for high efficiency photovoltaic devices  

SciTech Connect (OSTI)

InP-based multijunction tandem solar cells show great promise for the conversion efficiency (eta) and high radiation resistance. InP and its related ternary and quanternary compound semiconductors such as InGaAs and InGaAsP offer desirable combinations for energy bandgap values which are very suitable for multijunction tandem solar cell applications. The monolithically integrated InP/In(0.53)Ga(0.47)As tandem solar cells are expected to reach efficiencies above 30 percent. Wanlass, et.al., have reported AMO efficiencies as high as 20.1% for two terminal cells fabricated using atmospheric-pressure metalorganic vapor phase epitaxy (APMOVPE). The main limitations in their technique are first related to the degradation of the intercell ohmic contact (IOC), in this case the In(0.53)Ga(0.47)As tunnel junction during the growth of the top InP subcell structure, and second to the current matching, often limited by the In(0.53)Ga(0.47)As bottom subcell. Chemical beam epitaxy (CBE) has been shown to allow the growth of high quality materials with reproducible complex compositional and doping profiles. The main advantage of CBE compared to metalorganic chemical vapor deposition (MOCVD), the most popular technique for InP-based photovoltaic device fabrication, is the ability to grow high purity epilayers at much lower temperatures (450 C - 530 C). In a recent report it was shown that cost-wise CBE is a breakthrough technology for photovoltaic (PV) solar energy progress in the energy conversion efficiency of InP-based solar cells fabricated using chemical beam epitaxy. This communication summarizes recent results on PV devices and demonstrates the strength of this new technology.

Bensaoula, A.; Freundlich, A.; Vilela, M. F.; Medelci, N.; Renaud, P.

1994-09-01T23:59:59.000Z

246

OSRAM SYLVANIA Develops High-Efficiency LED Troffer Replacement  

Broader source: Energy.gov [DOE]

With the help of DOE funding, OSRAM SYLVANIA is developing a high-efficiency LED 2'x2' troffer replacement that is expected to be commercially available in the spring of 2012 and to be cost-competitive with existing troffers of that size. It is projected to have a light output of up to 4,000 lumens, an efficacy of more than 100 lm/W, and a CCT of 3500K.

247

Low-Temperature Combustion Demonstrator for High-Efficiency Clean  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion | Department of Energy Low-Temperature Combustion Demonstrator for High-Efficiency Clean

248

High Efficiency Combustion and Controls | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional Subject:Ground Hawaii CleanHeatinHigh Efficiency Cold

249

High Efficiency Full Expansion (FEx) Engine for Automotive Applications |  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional Subject:Ground Hawaii CleanHeatinHigh Efficiency| Department

250

High Efficiency Microturbine with Integral Heat Recovery - Presentation by  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional Subject:Ground Hawaii CleanHeatinHigh Efficiency|

251

High Efficiency and Stable White OLED Using a Single Emitter  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional Subject:Ground Hawaii CleanHeatinHigh Efficiency| - ADVANCEDJian

252

High Performance Healthcare Buildings: A Roadmap to Improved Energy Efficiency  

E-Print Network [OSTI]

operation with energy efficiency in building systems. X X Xoperation with energy efficiency in building systems. 10.3.energy efficiency improvements in healthcare buildings. A

Singer, Brett C.

2010-01-01T23:59:59.000Z

253

High Performance Healthcare Buildings: A Roadmap to Improved Energy Efficiency  

E-Print Network [OSTI]

consensus on energy efficient designs by climate and inestimates for an energy efficient alternative design can behighly energy efficient hospitals while the design community

Singer, Brett C.

2010-01-01T23:59:59.000Z

254

Physiological applications for determining water use efficiency among cotton genotypes  

E-Print Network [OSTI]

in either light- or dark-adapted leaves. In Experiment I TAM 89E-51 had a significantly greater seedcotton yield; however, in Experiment II TAMCOT 22 had the greater yield. These experiments suggest that the effects of water stress on cotton are a function...

Bynum, Joshua Brian

2009-05-15T23:59:59.000Z

255

Boosting the Efficiency of Suspended Photocatalysts for Overall Water Splitting  

E-Print Network [OSTI]

to the cost of photovoltaics and make solar energy technology even less competitive with polluting fossil energy carriers. Solar-energy-driven water electrolysis can be a viable solution to this problem. Hydrogen is the smallest and easiest to fabricate "battery" that exists, and it can be used as a gaseous

Osterloh, Frank

256

CONSTRUCTED FARM WETLANDS (CFWs) FOR REMEDIATION OF FARMYARD RUNOFF: WATER TREATMENT EFFICIENCY, ECOLOGICAL  

E-Print Network [OSTI]

CONSTRUCTED FARM WETLANDS (CFWs) FOR REMEDIATION OF FARMYARD RUNOFF: WATER TREATMENT EFFICIENCY, Aberdeen, AB15 8QH, UK E-mail: fabrice.gouriveau@ed.ac.uk Summary: This research evaluates the treatment efficiency, ecological value and cost-effectiveness of two Scottish Constructed Farm Wetlands (CFW 1 & 2

257

Efficient Solar Concentrators: Affordable Energy from Water and Sunlight  

SciTech Connect (OSTI)

Broad Funding Opportunity Announcement Project: Teledyne is developing a liquid prism panel that tracks the position of the sun to help efficiently concentrate its light onto a solar cell to produce power. Typically, solar tracking devices have bulky and expensive mechanical moving parts that require a lot of power and are often unreliable. Teledyne’s liquid prism panel has no bulky and heavy supporting parts—instead it relies on electrowetting. Electrowetting is a process where an electric field is applied to the liquid to control the angle at which it meets the sunlight above and to control the angle of the sunlight to the focusing lensthe more direct the angle to the focusing lens, the more efficiently the light can be concentrated to solar panels and converted into electricity. This allows the prism to be tuned like a radio to track the sun across the sky and steer sunlight into the solar cell without any moving mechanical parts. This process uses very little power and requires no expensive supporting hardware or moving parts, enabling efficient and quiet rooftop operation for integration into buildings.

None

2010-01-01T23:59:59.000Z

258

An International Survey of Electric Storage Tank Water Heater Efficiency and Standards  

SciTech Connect (OSTI)

Water heating is a main consumer of energy in households, especially in temperate and cold climates. In South Africa, where hot water is typically provided by electric resistance storage tank water heaters (geysers), water heating energy consumption exceeds cooking, refrigeration, and lighting to be the most consumptive single electric appliance in the home. A recent analysis for the Department of Trade and Industry (DTI) performed by the authors estimated that standing losses from electric geysers contributed over 1,000 kWh to the annual electricity bill for South African households that used them. In order to reduce this burden, the South African government is currently pursuing a programme of Energy Efficiency Standards and Labelling (EES&L) for electric appliances, including geysers. In addition, Eskom has a history of promoting heat pump water heaters (HPWH) through incentive programs, which can further reduce energy consumption. This paper provides a survey of international electric storage water heater test procedures and efficiency metrics which can serve as a reference for comparison with proposed geyser standards and ratings in South Africa. Additionally it provides a sample of efficiency technologies employed to improve the efficiency of electric storage water heaters, and outlines programs to promote adoption of improved efficiency. Finally, it surveys current programs used to promote HPWH and considers the potential for this technology to address peak demand more effectively than reduction of standby losses alone

Johnson, Alissa; Lutz, James; McNeil, Michael A.; Covary, Theo

2013-11-13T23:59:59.000Z

259

Efficient Water Use for Texans: Policies, Tools, and Management Strategies  

E-Print Network [OSTI]

on Environmental Quality are continuing to evaluate options for reuse of separated graywater streams, as well as treatment of the entire wastewater stream to a quality suitable for outdoor irrigation. Installation of a domestic graywater reuse system that stores... from rural to urban areas, and with the migration of people from other states to Texas cities, urban demands will increasingly compete with agricultural interests for the same water (figure 1). For instance, in the Lower Rio Grande Valley, irrigation...

Gerston, Jan; MacLeod, Mark; Jones, C. Allan

260

Improving the efficiency of water splitting in dye-sensitized solar cells by using a biomimetic  

E-Print Network [OSTI]

Improving the efficiency of water splitting in dye-sensitized solar cells by using a biomimetic studied this problem in dye-sensitized solar cells where a molecular dye and a porous TiO2 electrode act been demonstrated using dye-sensitized electrodes. The quantum yield for water splitting in these dye

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


261

High efficiency rare-earth emitter for thermophotovoltaic applications  

SciTech Connect (OSTI)

In this work, we propose a rare-earth-based ceramic thermal emitter design that can boost thermophotovoltaic (TPV) efficiencies significantly without cold-side filters at a temperature of 1573?K (1300?°C). The proposed emitter enhances a naturally occurring rare earth transition using quality-factor matching, with a quarter-wave stack as a highly reflective back mirror, while suppressing parasitic losses via exponential chirping of a multilayer reflector transmitting only at short wavelengths. This allows the emissivity to approach the blackbody limit for wavelengths overlapping with the absorption peak of the rare-earth material, while effectively reducing the losses associated with undesirable long-wavelength emission. We obtain TPV efficiencies of 34% using this layered design, which only requires modest index contrast, making it particularly amenable to fabrication via a wide variety of techniques, including sputtering, spin-coating, and plasma-enhanced chemical vapor deposition.

Sakr, E. S.; Zhou, Z.; Bermel, P., E-mail: pbermel@purdue.edu [Birck Nanotechnology Center, School of Electrical and Computer Engineering, Purdue University, 1205 W. State St., West Lafayette, Indiana 47907 (United States)

2014-09-15T23:59:59.000Z

262

High efficiency silicon nanohole/organic heterojunction hybrid solar cell  

SciTech Connect (OSTI)

High efficiency hybrid solar cells are fabricated based on silicon with a nanohole (SiNH) structure and poly (3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS). The SiNH structure is fabricated using electroless chemical etching with silver catalyst, and the heterojunction is formed by spin coating of PEDOT on the SiNH. The hybrid cells are optimized by varying the hole depth, and a maximum power conversion efficiency of 8.3% is achieved with a hole depth of 1??m. The SiNH hybrid solar cell exhibits a strong antireflection and light trapping property attributed to the sub-wavelength dimension of the SiNH structure.

Hong, Lei [Novitas, Nanoelectronics Centre of Excellence, School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798 (Singapore); Singapore Institute of Manufacturing Technology, A-STAR (Agency for Science, Technology and Research), 71 Nanyang Drive, Singapore 638075 (Singapore); Wang, Xincai; Zheng, Hongyu [Singapore Institute of Manufacturing Technology, A-STAR (Agency for Science, Technology and Research), 71 Nanyang Drive, Singapore 638075 (Singapore); He, Lining; Wang, Hao; Rusli, E-mail: yu.hy@sustc.edu.cn, E-mail: erusli@ntu.edu.sg [Novitas, Nanoelectronics Centre of Excellence, School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798 (Singapore); Yu, Hongyu, E-mail: yu.hy@sustc.edu.cn, E-mail: erusli@ntu.edu.sg [South University of Science and Technology of China, Shenzhen (China)

2014-02-03T23:59:59.000Z

263

Energy-efficient wireless communication In this chapter we present an energy-efficient highly adaptive network  

E-Print Network [OSTI]

delay. This chapter addresses the additional goal of efficient energy usage of the mobilesEnergy-efficient wireless communication In this chapter we present an energy-efficient highly of wireless networks, adaptations in bandwidth scheduling and error control are necessary to achieve energy

Havinga, Paul J.M.

264

Best Management Practices for Water Efficiency | Department of Energy  

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:Year in Review: Top Five EEREDepartment ofEnergy StevenHouseFieldBeowaweProgram Areas » Water

265

The Importance of Domain Size and Purity in High-Efficiency Organic...  

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

The Importance of Domain Size and Purity in High-Efficiency Organic Solar Cells Print The efficiency of polymerorganic photovoltaic cells hinges on excitons-electronhole pairs...

266

Highly Efficient Quantum Key Distribution Immune to All Detector Attacks  

E-Print Network [OSTI]

Vulnerabilities and imperfections of single-photon detectors have been shown to compromise security for quantum key distribution (QKD). The measurement-device-independent QKD (MDI-QKD) appears to be the most appealing solution to solve the issues. However, in practice one faces severe obstacles of having significantly lower key generation rate, difficult two photon interferences, and remote synchronization etc. In this letter, we propose a highly efficient and simple quantum key distribution scheme to remove all of these drawbacks. Our proposal can be implemented with only small modifications over the standard decoy BB84 system. Remarkably it enjoys both the advantages of high key generation rate (being almost two orders of magnitude higher than that based on conventional MDI-QKD) comparable to the normal decoy system, and security against any detector side channel attacks. Most favorably one can achieve complete Bell state measurements with resort to single photon interference, which reduces significantly experimental costs. Our approach enables utilization of high speed and efficient secure communication, particularly in real-life scenario of both metropolitan and intercity QKD network, with an attack free fashion from arbitrary detector side channels.

Wen-Fei Cao; Yi-Zheng Zhen; Yu-Lin Zheng; Zeng-Bing Chen; Nai-Le Liu; Kai Chen; Jian-Wei Pan

2014-10-10T23:59:59.000Z

267

Sustaining Industrial Energy Efficiency in Process Cooling in a Potentially Water-Short Future  

E-Print Network [OSTI]

by Energy-Intensive Plants* Source: Anonymous US petrochemical company *Includes refineries and ethylene plants ESL-IE-14-05-18 Proceedings of the Thrity-Sixth Industrial Energy Technology Conference New Orleans, LA. May 20-23, 2014 Estimated Water Use... Sources Strategy: Education on New(er) Technologies and Approaches • Barriers to Use of Unconventional Water Sources (sea water, brackish water or brine water) – High pipeline costs; Need to address upgrades to metallurgy as well as minimizing...

Ferland, K.

2014-01-01T23:59:59.000Z

268

High Efficiency Engine Systems Development and Evaluation | Department of  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional Subject:Ground Hawaii CleanHeatinHigh Efficiency ColdEnergy 2

269

High Efficiency Engine Systems Development and Evaluation | Department of  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional Subject:Ground Hawaii CleanHeatinHigh Efficiency ColdEnergy

270

High Efficiency Fuel Reactivity Controlled Compression Ignition Combustion  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional Subject:Ground Hawaii CleanHeatinHigh Efficiency| Department of

271

High Engine Efficiency at 2010 Emissions | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional Subject:Ground Hawaii CleanHeatinHigh Efficiency| -4Novel

272

A portable and high energy efficient desalination/purification system by ion concentration polarization  

E-Print Network [OSTI]

The shortage of fresh water is one of the acute challenges that the world is facing now and, thus, energy efficient desalination strategies can provide substantial answers for the water-crisis. Current desalination methods ...

Kim, Sung Jae

273

A High Efficiency PSOFC/ATS-Gas Turbine Power System  

SciTech Connect (OSTI)

A study is described in which the conceptual design of a hybrid power system integrating a pressurized Siemens Westinghouse solid oxide fuel cell generator and the Mercury{trademark} 50 gas turbine was developed. The Mercury{trademark} 50 was designed by Solar Turbines as part of the US. Department of Energy Advanced Turbine Systems program. The focus of the study was to develop the hybrid power system concept that principally would exhibit an attractively-low cost of electricity (COE). The inherently-high efficiency of the hybrid cycle contributes directly to achieving this objective, and by employing the efficient, power-intensive Mercury{trademark} 50, with its relatively-low installed cost, the higher-cost SOFC generator can be optimally sized such that the minimum-COE objective is achieved. The system cycle is described, major system components are specified, the system installed cost and COE are estimated, and the physical arrangement of the major system components is discussed. Estimates of system power output, efficiency, and emissions at the system design point are also presented. In addition, two bottoming cycle options are described, and estimates of their effects on overall-system performance, cost, and COE are provided.

W.L. Lundberg; G.A. Israelson; M.D. Moeckel; S.E. Veyo; R.A. Holmes; P.R. Zafred; J.E. King; R.E. Kothmann

2001-02-01T23:59:59.000Z

274

Thin Film Packaging Solutions for High Efficiency OLED Lighting Products  

SciTech Connect (OSTI)

The objective of the 'Thin Film Packaging Solutions for High Efficiency OLED Lighting Products' project is to demonstrate thin film packaging solutions based on SiC hermetic coatings that, when applied to glass and plastic substrates, support OLED lighting devices by providing longer life with greater efficiency at lower cost than is currently available. Phase I Objective: Demonstrate thin film encapsulated working phosphorescent OLED devices on optical glass with lifetime of 1,000 hour life, CRI greater than 75, and 15 lm/W. Phase II Objective: Demonstrate thin film encapsulated working phosphorescent OLED devices on plastic or glass composite with 25 lm/W, 5,000 hours life, and CRI greater than 80. Phase III Objective: Demonstrate 2 x 2 ft{sup 2} thin film encapsulated working phosphorescent OLED with 40 lm/W, 10,000 hour life, and CRI greater than 85. This report details the efforts of Phase III (Budget Period Three), a fourteen month collaborative effort that focused on optimization of high-efficiency phosphorescent OLED devices and thin-film encapsulation of said devices. The report further details the conclusions and recommendations of the project team that have foundation in all three budget periods for the program. During the conduct of the Thin Film Packaging Solutions for High Efficiency OLED Lighting Products program, including budget period three, the project team completed and delivered the following achievements: (1) a three-year marketing effort that characterized the near-term and longer-term OLED market, identified customer and consumer lighting needs, and suggested prototype product concepts and niche OLED applications lighting that will give rise to broader market acceptance as a source for wide area illumination and energy conservation; (2) a thin film encapsulation technology with a lifetime of nearly 15,000 hours, tested by calcium coupons, while stored at 16 C and 40% relative humidity ('RH'). This encapsulation technology was characterized as having less than 10% change in transmission during the 15,000 hour test period; (3) demonstrated thin film encapsulation of a phosphorescent OLED device with 1,500 hours of lifetime at 60 C and 80% RH; (4) demonstrated that a thin film laminate encapsulation, in addition to the direct thin film deposition process, of a polymer OLED device was another feasible packaging strategy for OLED lighting. The thin film laminate strategy was developed to mitigate defects, demonstrate roll-to-roll process capability for high volume throughput (reduce costs) and to support a potential commercial pathway that is less dependent upon integrated manufacturing since the laminate could be sold as a rolled good; (5) demonstrated that low cost 'blue' glass substrates could be coated with a siloxane barrier layer for planarization and ion-protection and used in the fabrication of a polymer OLED lighting device. This study further demonstrated that the substrate cost has potential for huge cost reductions from the white borosilicate glass substrate currently used by the OLED lighting industry; (6) delivered four-square feet of white phosphorescent OLED technology, including novel high efficiency devices with 82 CRI, greater than 50 lm/W efficiency, and more than 1,000 hours lifetime in a product concept model shelf; (7) presented and or published more than twenty internal studies (for private use), three external presentations (OLED workshop-for public use), and five technology-related external presentations (industry conferences-for public use); and (8) issued five patent applications, which are in various maturity stages at time of publication. Delivery of thin film encapsulated white phosphorescent OLED lighting technology remains a challenging technical achievement, and it seems that commercial availability of thin, bright, white OLED light that meets market requirements will continue to require research and development effort. However, there will be glass encapsulated white OLED lighting products commercialized in niche markets during the 2008 calendar year. This commercializ

None

2008-06-30T23:59:59.000Z

275

High-Efficiency Nitride-Base Photonic Crystal Light Sources  

SciTech Connect (OSTI)

The research activities performed in the framework of this project represent a major breakthrough in the demonstration of Photonic Crystals (PhC) as a competitive technology for LEDs with high light extraction efficiency. The goals of the project were to explore the viable approaches to manufacturability of PhC LEDS through proven standard industrial processes, establish the limits of light extraction by various concepts of PhC LEDs, and determine the possible advantages of PhC LEDs over current and forthcoming LED extraction concepts. We have developed three very different geometries for PhC light extraction in LEDs. In addition, we have demonstrated reliable methods for their in-depth analysis allowing the extraction of important parameters such as light extraction efficiency, modal extraction length, directionality, internal and external quantum efficiency. The information gained allows better understanding of the physical processes and the effect of the design parameters on the light directionality and extraction efficiency. As a result, we produced LEDs with controllable emission directionality and a state of the art extraction efficiency that goes up to 94%. Those devices are based on embedded air-gap PhC - a novel technology concept developed in the framework of this project. They rely on a simple and planar fabrication process that is very interesting for industrial implementation due to its robustness and scalability. In fact, besides the additional patterning and regrowth steps, the process is identical as that for standard industrially used p-side-up LEDs. The final devices exhibit the same good electrical characteristics and high process yield as a series of test standard LEDs obtained in comparable conditions. Finally, the technology of embedded air-gap patterns (PhC) has significant potential in other related fields such as: increasing the optical mode interaction with the active region in semiconductor lasers; increasing the coupling of the incident light into the active region of solar cells; increasing the efficiency of the phosphorous light conversion in white light LEDs etc. In addition to the technology of embedded PhC LEDs, we demonstrate a technique for improvement of the light extraction and emission directionality for existing flip-chip microcavity (thin) LEDs by introducing PhC grating into the top n-contact. Although, the performances of these devices in terms of increase of the extraction efficiency are not significantly superior compared to those obtained by other techniques like surface roughening, the use of PhC offers some significant advantages such as improved and controllable emission directionality and a process that is directly applicable to any material system. The PhC microcavity LEDs have also potential for industrial implementation as the fabrication process has only minor differences to that already used for flip-chip thin LEDs. Finally, we have demonstrated that achieving good electrical properties and high fabrication yield for these devices is straightforward.

James Speck; Evelyn Hu; Claude Weisbuch; Yong-Seok Choi; Kelly McGroddy; Gregor Koblmuller; Elison Matioli; Elizabeth Rangel; Fabian Rol; Dobri Simeonov

2010-01-31T23:59:59.000Z

276

Does Transferring Water Present an Efficient Way of Solving Water Scarcity in China's Northeast?  

E-Print Network [OSTI]

to the understanding of water scarcity in China and provides an academic analysis that argues in favor of the SNWDP as a partial solution in dealing with China's water scarcity. I propose an argument supporting water transfer as a potential partial solution...

Markosov, Artem Igorevich

2014-05-31T23:59:59.000Z

277

High Performance Healthcare Buildings: A Roadmap to Improved Energy Efficiency  

E-Print Network [OSTI]

Roadmap to Improved Energy Efficiency iii 11-Sept-2009 ListA Roadmap to Improved Energy Efficiency 11-Sept-2009 Topic /A Roadmap to Improved Energy Efficiency 11-Sept-2009 Topic /

Singer, Brett C.

2010-01-01T23:59:59.000Z

278

Cross section generation strategy for high conversion light water reactors  

E-Print Network [OSTI]

High conversion water reactors (HCWR), such as the Resource-renewable Boiling Water Reactor (RBWR), are being designed with axial heterogeneity of alternating fissile and blanket zones to achieve a conversion ratio of ...

Herman, Bryan R. (Bryan Robert)

2011-01-01T23:59:59.000Z

279

High Efficiency Microturbine with Integral Heat Recovery - Fact...  

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

Research Center, is developing a clean, cost-effective 370 kW microturbine with 42% net electrical efficiency and 85% total CHP efficiency. The microturbine technology will...

280

Holography as a highly efficient RG flow : Part 1  

E-Print Network [OSTI]

We investigate how the holographic correspondence can be reconstructed as a special RG flow in a strongly interacting large $N$ field theory. We firstly define a "highly efficient RG flow" as one in which the cut-off in momentum space can be adjusted as a functional of the elementary fields, and of the external sources and of the background metric in order to be compatible with the following requirement: the Ward identities for single-trace operators involving conservation of energy, momentum and global charges must preserve the same form at every scale. In order to absorb the contributions of the multi-trace operators to these effective Ward identities, the external sources and the background metric need to be redefined at each scale, and thus they become dynamical as in the dual gravity equations. We give a schematic construction of such highly efficient RG flows using appropriate collective variables, leaving a more explicit construction in certain limits to the second part of this work. We find that all h...

Behr, Nicolas; Mukhopadhyay, Ayan

2015-01-01T23:59:59.000Z

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


281

Nanocoatings for High-Efficiency Industrial Hydraulic and Tooling Systems  

SciTech Connect (OSTI)

Industrial manufacturing in the U.S. accounts for roughly one third of the 98 quadrillion Btu total energy consumption. Motor system losses amount to 1.3 quadrillion Btu, which represents the largest proportional loss of any end-use category, while pumps alone represent over 574 trillion BTU (TBTU) of energy loss each year. The efficiency of machines with moving components is a function of the amount of energy lost to heat because of friction between contacting surfaces. The friction between these interfaces also contributes to downtime and the loss of productivity through component wear and subsequent repair. The production of new replacement parts requires additional energy. Among efforts to reduce energy losses, wear-resistant, low-friction coatings on rotating and sliding components offer a promising approach that is fully compatible with existing equipment and processes. In addition to lubrication, one of the most desirable solutions is to apply a protective coating or surface treatment to rotating or sliding components to reduce their friction coefficients, thereby leading to reduced wear. Historically, a number of materials such as diamond-like carbon (DLC), titanium nitride (TiN), titanium aluminum nitride (TiAlN), and tungsten carbide (WC) have been examined as tribological coatings. The primary objective of this project was the development of a variety of thin film nanocoatings, derived from the AlMgB14 system, with a focus on reducing wear and friction in both industrial hydraulics and cutting tool applications. Proof-of-concept studies leading up to this project had shown that the constituent phases, AlMgB14 and TiB2, were capable of producing low-friction coatings by pulsed laser deposition. These coatings combine high hardness with a low friction coefficient, and were shown to substantially reduce wear in laboratory tribology tests. Selection of the two applications was based largely on the concept of improved mechanical interface efficiencies for energy conservation. In mobile hydraulic systems, efficiency gains through low friction would translate into improved fuel economy and fewer greenhouse gas emissions. Stationary hydraulic systems, accordingly, would consume less electrical power. Reduced tooling wear in machining operations would translate to greater operating yields, while lowering the energy consumed during processing. The AlMgB14 nanocoatings technology progressed beyond baseline laboratory tests into measurable energy savings and enhancements to product durability. Three key hydraulic markets were identified over the course of the project that will benefit from implementation: industrial vane pumps, orbiting valve-in-star hydraulic motors, and variable displacement piston pumps. In the vane pump application, the overall product efficiency was improved by as much as 11%. Similar results were observed with the hydraulic motors tested, where efficiency gains of over 10% were noted. For variable displacement piston pumps, overall efficiency was improved by 5%. For cutting tools, the most significant gains in productivity (and, accordingly, the efficiency of the machining process as a whole) were associated with the roughing and finishing of titanium components for aerospace systems. Use of the AlMgB14 nanocoating in customer field tests has shown that the coated tools were able to withstand machining rates as high as 500sfm (limited only by the substrate material), with relatively low flank wear when compared to other industrial offerings. AlMgB14 coated tools exhibited a 60% improvement over similarly applied TiAlN thin films. Furthermore, AlMgB14-based coatings in these particular tests lasted twice as long than their TiAlN counterparts at the 500sfm feed rates. Full implementation of the technology into the industrial hydraulic and cutting tool markets equates to a worldwide energy savings of 46 trillion BTU/year by 2030. U.S.-based GHG emissions associated with the markets identified would fall accordingly, dropping by as much as 50,000 tonnes annually.

Clifton B. Higdon III

2011-01-07T23:59:59.000Z

282

IMPROVING ENERGY EFFICIENCY AND REDUCING COSTS IN THE DRINKING WATER SUPPLY INDUSTRY: An ENERGY STAR Resource Guide for Energy and Plant Managers  

E-Print Network [OSTI]

31, 2010. ) U.S. DOE Energy Efficiency & Renewable Energy (3, 2010. ) Northwest Energy Efficiency Alliance, ElectricEPRI. 1997. Quality Energy Efficiency Retrofits for Water

Brown, Moya Melody, Camilla Dunham Whitehead, Rich

2011-01-01T23:59:59.000Z

283

Magnetic Refrigeration Technology for High Efficiency Air Conditioning  

SciTech Connect (OSTI)

Magnetic refrigeration was investigated as an efficient, environmentally friendly, flexible alternative to conventional residential vapor compression central air conditioning systems. Finite element analysis (FEA) models of advanced geometry active magnetic regenerator (AMR) beds were developed to minimize bed size and thus magnet mass by optimizing geometry for fluid flow and heat transfer and other losses. Conventional and magnetocaloric material (MCM) regenerator fabrication and assembly techniques were developed and advanced geometry passive regenerators were built and tested. A subscale engineering prototype (SEP) magnetic air conditioner was designed, constructed and tested. A model of the AMR cycle, combined with knowledge from passive regenerator experiments and FEA results, was used to design the regenerator beds. A 1.5 Tesla permanent magnet assembly was designed using FEA and the bed structure and plenum design was extensively optimized using FEA. The SEP is a flexible magnetic refrigeration platform, with individually instrumented beds and high flow rate and high frequency capability, although the current advanced regenerator geometry beds do not meet performance expectations, probably due to manufacturing and assembly tolerances. A model of the AMR cycle was used to optimize the design of a 3 ton capacity magnetic air conditioner, and the system design was iterated to minimize external parasitic losses such as heat exchanger pressure drop and fan power. The manufacturing cost for the entire air conditioning system was estimated, and while the estimated SEER efficiency is high, the magnetic air conditioning system is not cost competitive as currently configured. The 3 ton study results indicate that there are other applications where magnetic refrigeration is anticipated to have cost advantages over conventional systems, especially applications where magnetic refrigeration, through the use of its aqueous heat transfer fluid, could eliminate intermediate heat exchangers or oil distribution issues found in traditional vapor compression systems.

Boeder, A; Zimm, C

2006-09-30T23:59:59.000Z

284

Development of an advanced high efficiency coal combustor for boiler retrofit  

SciTech Connect (OSTI)

The objective of the program was to develop an advanced coal combustion system for firing beneficiated coal fuels (BCFs) capable of being retrofitted to industrial boilers originally designed for firing natural gas. The High Efficiency Advanced Coal Combustor system is capable of firing microfine coal-water fuel (MCWF), MCWF with alkali sorbent (for SO{sub 2} reduction), and dry microfine coal. Design priorities for the system were that it be simple to operate and offer significant reductions in NO{sub x}, SO{sub x}, and particulate emissions as compared with current coal-fired combustor technology. (VC)

LaFlesh, R.C.; Rini, M.J.; McGowan, J.G.; Beer, J.M.; Toqan, M.A.

1990-04-01T23:59:59.000Z

285

Development of an advanced high efficiency coal combustor for boiler retrofit. Summary report  

SciTech Connect (OSTI)

The objective of the program was to develop an advanced coal combustion system for firing beneficiated coal fuels (BCFs) capable of being retrofitted to industrial boilers originally designed for firing natural gas. The High Efficiency Advanced Coal Combustor system is capable of firing microfine coal-water fuel (MCWF), MCWF with alkali sorbent (for SO{sub 2} reduction), and dry microfine coal. Design priorities for the system were that it be simple to operate and offer significant reductions in NO{sub x}, SO{sub x}, and particulate emissions as compared with current coal-fired combustor technology. (VC)

LaFlesh, R.C.; Rini, M.J.; McGowan, J.G.; Beer, J.M.; Toqan, M.A.

1990-04-01T23:59:59.000Z

286

Processes for producing low cost, high efficiency silicon solar cells  

DOE Patents [OSTI]

Processes which utilize rapid thermal processing (RTP) are provided for inexpensively producing high efficiency silicon solar cells. The RTP processes preserve minority carrier bulk lifetime {tau} and permit selective adjustment of the depth of the diffused regions, including emitter and back surface field (bsf), within the silicon substrate. In a first RTP process, an RTP step is utilized to simultaneously diffuse phosphorus and aluminum into the front and back surfaces, respectively, of a silicon substrate. Moreover, an in situ controlled cooling procedure preserves the carrier bulk lifetime {tau} and permits selective adjustment of the depth of the diffused regions. In a second RTP process, both simultaneous diffusion of the phosphorus and aluminum as well as annealing of the front and back contacts are accomplished during the RTP step. In a third RTP process, the RTP step accomplishes simultaneous diffusion of the phosphorus and aluminum, annealing of the contacts, and annealing of a double-layer antireflection/passivation coating SiN/SiO{sub x}. In a fourth RTP process, the process of applying front and back contacts is broken up into two separate respective steps, which enhances the efficiency of the cells, at a slight time expense. In a fifth RTP process, a second RTP step is utilized to fire and adhere the screen printed or evaporated contacts to the structure. 28 figs.

Rohatgi, A.; Doshi, P.; Tate, J.K.; Mejia, J.; Chen, Z.

1998-06-16T23:59:59.000Z

287

Highly Efficient Small Form Factor LED Retrofit Lamp  

SciTech Connect (OSTI)

This report summarizes work to develop a high efficiency LED-based MR16 lamp downlight at OSRAM SYLVANIA under US Department of Energy contract DE-EE0000611. A new multichip LED package, electronic driver, and reflector optic were developed for these lamps. At steady-state, the lamp luminous flux was 409 lumens (lm), luminous efficacy of 87 lumens per watt (LPW), CRI (Ra) of 87, and R9 of 85 at a correlated color temperature (CCT) of 3285K. The LED alone achieved 120 lumens per watt efficacy and 600 lumen flux output at 25 C. The driver had 90% electrical conversion efficiency while maintaining excellent power quality with power factor >0.90 at a power of only 5 watts. Compared to similar existing MR16 lamps using LED sources, these lamps had much higher efficacy and color quality. The objective of this work was to demonstrate a LED-based MR16 retrofit lamp for replacement of 35W halogen MR16 lamps having (1) luminous flux of 500 lumens, (2) luminous efficacy of 100 lumens per watt, (3) beam angle less than 40{sup o} and center beam candlepower of at least 1000 candelas, and (4) excellent color quality.

Steven Allen; Fred Palmer; Ming Li

2011-09-11T23:59:59.000Z

288

Processes for producing low cost, high efficiency silicon solar cells  

DOE Patents [OSTI]

Processes which utilize rapid thermal processing (RTP) are provided for inexpensively producing high efficiency silicon solar cells. The RTP processes preserve minority carrier bulk lifetime .tau. and permit selective adjustment of the depth of the diffused regions, including emitter and back surface field (bsf), within the silicon substrate. In a first RTP process, an RTP step is utilized to simultaneously diffuse phosphorus and aluminum into the front and back surfaces, respectively, of a silicon substrate. Moreover, an in situ controlled cooling procedure preserves the carrier bulk lifetime .tau. and permits selective adjustment of the depth of the diffused regions. In a second RTP process, both simultaneous diffusion of the phosphorus and aluminum as well as annealing of the front and back contacts are accomplished during the RTP step. In a third RTP process, the RTP step accomplishes simultaneous diffusion of the phosphorus and aluminum, annealing of the contacts, and annealing of a double-layer antireflection/passivation coating SiN/SiO.sub.x. In a fourth RTP process, the process of applying front and back contacts is broken up into two separate respective steps, which enhances the efficiency of the cells, at a slight time expense. In a fifth RTP process, a second RTP step is utilized to fire and adhere the screen printed or evaporated contacts to the structure.

Rohatgi, Ajeet (Marietta, GA); Doshi, Parag (Altanta, GA); Tate, John Keith (Lawrenceville, GA); Mejia, Jose (Atlanta, GA); Chen, Zhizhang (Duluth, GA)

1998-06-16T23:59:59.000Z

289

Processes for producing low cost, high efficiency silicon solar cells  

DOE Patents [OSTI]

Processes which utilize rapid thermal processing (RTP) are provided for inexpensively producing high efficiency silicon solar cells. The RTP processes preserve minority carrier bulk lifetime .tau. and permit selective adjustment of the depth of the diffused regions, including emitter and back surface field (bsf), within the silicon substrate. Silicon solar cell efficiencies of 16.9% have been achieved. In a first RTP process, an RTP step is utilized to simultaneously diffuse phosphorus and aluminum into the front and back surfaces, respectively, of a silicon substrate. Moreover, an in situ controlled cooling procedure preserves the carrier bulk lifetime .tau. and permits selective adjustment of the depth of the diffused regions. In a second RTP process, both simultaneous diffusion of the phosphorus and aluminum as well as annealing of the front and back contacts are accomplished during the RTP step. In a third RTP process, the RTP step accomplishes simultaneous diffusion of the phosphorus and aluminum, annealing of the contacts, and annealing of a double-layer antireflection/passivation coating SiN/SiO.sub.x.

Rohatgi, Ajeet (Marietta, GA); Chen, Zhizhang (Duluth, GA); Doshi, Parag (Atlanta, GA)

1996-01-01T23:59:59.000Z

290

Performance of a high efficiency advanced coal combustor  

SciTech Connect (OSTI)

Under contract from DOE-PETC, Combustion Engineering, Inc. undertook the lead-role in a multi-task R D program aimed at development of a new burner system for coal-based fuels; the goal was that this burner system should be capable of being retrofitted in oil- or gas-fired industrial boilers, or usable in new units. In the first phase of this program a high efficiency advanced coal combustor was designed jointly by CE and MIT. Its burner is of the multiannular design with a fixed shrouded swirler in the center immediately surrounding the atomizer gun to provide the primary act,'' and three further annuli for the supply of the secondary air.'' The degree of rotation (swirl) in the secondary air is variable. The split of the combustion air into primary and secondary air flows serves the purpose of flame stabilization and combustion staging, the latter to reduce NO{sub x} formation.

Toqan, M.A.; Paloposki, T.; Yu, T.; Teare, J.D.; Beer, J.M. (Massachusetts Inst. of Tech., Cambridge, MA (United States))

1989-12-01T23:59:59.000Z

291

High-Efficiency, Ultra-Low Emission Combustion in a Heavy-Duty...  

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

High-Efficiency, Ultra-Low Emission Combustion in a Heavy-Duty Engine via Fuel Reactivity Control High-Efficiency, Ultra-Low Emission Combustion in a Heavy-Duty Engine via Fuel...

292

High-Efficiency Low-Cost Solar Receiver for Use in a Supercritical...  

Office of Environmental Management (EM)

High-Efficiency Low-Cost Solar Receiver for Use in a Supercritical CO2 Recompression Cycle - FY13 Q1 High-Efficiency Low-Cost Solar Receiver for Use in a Supercritical CO2...

293

High-Efficiency Clean Combustion in Light-Duty Multi-Cylinder...  

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

High-Efficiency Clean Combustion in Light-Duty Multi-Cylinder Diesel Engines High-Efficiency Clean Combustion in Light-Duty Multi-Cylinder Diesel Engines 2010 DOE Vehicle...

294

Low-Temperature Combustion for High-Efficiency, Ultra-Low Emission...  

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

Low-Temperature Combustion for High-Efficiency, Ultra-Low Emission Engines Low-Temperature Combustion for High-Efficiency, Ultra-Low Emission Engines Presentation given at DEER...

295

frequency high efficiency two-stage approach for future microprocessors  

E-Print Network [OSTI]

It is perceived that Moore’s Law will prevail at least for the next decade, with continuous advancements of processing technologies for very-large-scale integrated (VLSI) circuits. Nano technology is driving VLSI circuits in a path of greater transistor integration, faster clock frequency, and lower operation voltage. This has imposed a new challenge for delivering highquality power to modern processors. Power management technology is critical for transferring the required high current in a highly efficient way, and accurately regulating the sub-1V voltage in very fast dynamic transient response conditions. Furthermore, the VRs are limited in a given area and the power density is important to save the precious real estate of the motherboard. Based on the power delivery path model, the analysis results show that as long as the bandwidth can reach around 350 kHz, the bulk capacitor of the VR can be completely eliminated, which means significant savings in cost and real estate. Analysis also indicates that 650kHz bandwidth can reduce the number of the decoupling capacitor from 230 to 50 for future microprocessor case. Beyond 650kHz, the reduction is not obvious any more due to the parasitic components along the power delivery path. Following the vision of high bandwidth, the VRs need to operate at much higher frequency

Yuancheng Ren; Dusan Boroyevich; Daan Wyk; Guo Quan; Lu Douglas; K. Lindner; Yuancheng Ren

296

High Performance Healthcare Buildings: A Roadmap to Improved Energy Efficiency  

E-Print Network [OSTI]

Efficiency 11-Sept-2009 9. Economic and Organizationaland Organizational Issues 9.1. Strategies to overcome structural challenges to energy efficiencyorganizational scheme to facilitate discussion of challenges to improving energy efficiency

Singer, Brett C.

2010-01-01T23:59:59.000Z

297

Toward high-energy-density, high-efficiency, and moderate-temperature chip-scale thermophotovoltaics  

E-Print Network [OSTI]

- thermophotovoltaic (TPV) generator. The approach is predicted to be capable of up to 32% efficient heat system that was built and tested comprises a silicon propane microcombustor, an inte- grated high, generating 344 mW of electric power over a 1-cm2 area. catalytic combustion | micro generator | thermal

Soljaèiæ, Marin

298

High Efficiency of Gamma-Ray Bursts Revisited  

E-Print Network [OSTI]

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

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

2007-01-01T23:59:59.000Z

299

Advanced Combustion Technology to Enable High Efficiency Clean...  

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

for Efficiency Improvement Controls Variable Valve Actuation Variable Intake Swirl Turbo Technology Electrically Driven Components Aftertreatment Integration of Cummins...

300

Water Cooling of High Power Light Emitting Diode Henrik Srensen  

E-Print Network [OSTI]

Water Cooling of High Power Light Emitting Diode Henrik Sørensen Department of Energy Technology and product lifetime. The high power Light Emitting Diodes (LED) belongs to the group of electronics

Berning, Torsten

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301

Development of manufacturing capability for high-concentration, high-efficiency silicon solar cells  

SciTech Connect (OSTI)

This report presents a summary of the major results from a program to develop a manufacturable, high-efficiency silicon concentrator solar cell and a cost-effective manufacturing facility. The program was jointly funded by the Electric Power Research Institute, Sandia National Laboratories through the Concentrator Initiative, and SunPower Corporation. The key achievements of the program include the demonstration of 26%-efficient silicon concentrator solar cells with design-point (20 W/cm{sup 2}) efficiencies over 25%. High-performance front-surface passivations; that were developed to achieve this result were verified to be absolutely stable against degradation by 475 days of field exposure at twice the design concentration. SunPower demonstrated pilot production of more than 1500 of these cells. This cell technology was also applied to pilot production to supply 7000 17.7-cm{sup 2} one-sun cells (3500 yielded wafers) that demonstrated exceptional quality control. The average efficiency of 21.3% for these cells approaches the peak efficiency ever demonstrated for a single small laboratory cell within 2% (absolute). Extensive cost models were developed through this program and calibrated by the pilot-production project. The production levels achieved indicate that SunPower could produce 7-10 MW of concentrator cells per year in the current facility based upon the cell performance demonstrated during the program.

Sinton, R.A.; Verlinden, P.J.; Crane, R.A.; Swanson, R.N. [SunPower Corp., Sunnyvale, CA (United States)

1996-10-01T23:59:59.000Z

302

High-efficiency photovoltaics based on semiconductor nanostructures  

SciTech Connect (OSTI)

The objective of this project was to exploit a variety of semiconductor nanostructures, specifically semiconductor quantum wells, quantum dots, and nanowires, to achieve high power conversion efficiency in photovoltaic devices. In a thin-film device geometry, the objectives were to design, fabricate, and characterize quantum-well and quantum-dot solar cells in which scattering from metallic and/or dielectric nanostructures was employed to direct incident photons into lateral, optically confined paths within a thin (~1-3um or less) device structure. Fundamental issues concerning nonequilibrium carrier escape from quantum-confined structures, removal of thin-film devices from an epitaxial growth substrate, and coherent light trapping in thin-film photovoltaic devices were investigated. In a nanowire device geometry, the initial objectives were to engineer vertical nanowire arrays to optimize optical confinement within the nanowires, and to extend this approach to core-shell heterostructures to achieve broadspectrum absorption while maintaining high opencircuit voltages. Subsequent work extended this approach to include fabrication of nanowire photovoltaic structures on low-cost substrates.

Yu, Paul K.L. [University of California, San Diego; Yu, Edward T. [University of Texas at Austin; Wang, Deli [University of California, San Diego

2011-10-31T23:59:59.000Z

303

Gaz de France ordering high-efficiency drivers  

SciTech Connect (OSTI)

For natural gas transmission, distribution, and storage operations, Gaz de France is installing Creusot-Loire's new line of high-efficiency gas-turbine packages, powered by Allison 501 and 570 generators for compressor speeds exceeding 10,000 rpm. The Type CA.3 driver comprises a 501 generator coupled to a two-stage power turbine; the ISO base rating is 3265 kW on gas fuel with a heat rate of 12,050 Btu/kWhr. The CA.5 driver with the stronger 570 gas-turbine engine is base-rated at 4805 kW with a heat rate of 11,360 Btu/kWhr. Designed for direct-drive, with no intermediary gearing, the high-speed compressor operates on the 13,820-rpm output shaft speed of the CA.3 for baseload requirements or on 11,500 rpm for the more powerful CA.5 set. These compressor packages will serve as boosters for the transmission and storage of regasified LNG from Algeria and natural gas from the North Sea, USSR, and France's own Lacq fields.

de Biasi, V.

1980-11-01T23:59:59.000Z

304

Efficiency of carbon nanotubes water based nanofluids as coolants Salma Halelfadl a  

E-Print Network [OSTI]

previously determined. This may be helpful for using these nanofluids in real cooling systems. Keywords: Heat heating or cooling systems is used. Thus, there is a need to achieve compact systems, energy saving1 Efficiency of carbon nanotubes water based nanofluids as coolants Salma Halelfadl a , Thierry

Paris-Sud XI, Université de

305

Energy/Water (EW) Poster Number 63 Wednesday Conservation and Efficiency  

E-Print Network [OSTI]

throughout a day, due to time-of-use pricing and the increasing use of renewable energy sources. Present's Information Sciences Institute, is developing the DOE-funded Building Level Energy Management System (BLEMSEnergy/Water (EW) Poster Number 63 ­ Wednesday Conservation and Efficiency G-81 BEHAVIOR DRIVEN

Touch, Joe

306

High Efficiency, Ultra-Low Emission, Integrated Process Heater System  

SciTech Connect (OSTI)

The team of TIAX LLC, ExxonMobil Research and Engineering Company, and Callidus Technologies, LLC conducted a six-year program to develop an ultra-low emission process heater burner and an advanced high efficiency heater design. This project addresses the critical need of process heater operators for reliable, economical emission reduction technologies to comply with stringent emission regulations, and for heater design alternatives that reduce process heater energy requirements without significant cost increase. The key project targets were NOx emissions of 10 ppm (@ 3% O2), and a heater thermal efficiency of 95 percent. The ultra low NOx burner was developed through a series of pilot-scale and field tests combined with computational fluid dynamic modeling to arrive at simultaneous low emissions and suitable flame shape and stability. Pilot scale tests were run at TIAX, at the 2 MMBtu/hr scale, and at Callidus at 8 MMBtu/hr. The full scale burner was installed on a 14 burner atmospheric pipestill furnace at an ExxonMobil refinery. A variety of burner configurations, gas tips and flame stabilizers were tested to determine the lowest emissions with acceptable flame shape and stability. The resulting NOx emissions were 22 ppm on average. Starting in 2001, Callidus commercialized the original ultra low NOx burner and made subsequent design improvements in a series of commercial burners evolving from the original concept and/or development. Emissions in the field with the ultra low-NOx burner over a broad spectrum of heater applications have varied from 5 ppm to 30 ppm depending on heater geometry, heater service, fuel and firing capacity. To date, 1550 of the original burners, and 2500 of subsequent generation burners have been sold by Callidus. The advanced heater design was developed by parametric evaluations of a variety of furnace and combustion air preheater configurations and technologies for enhancing convective and radiative heat transfer. The design evolution relied heavily on computational fluid dynamic predictions of design alternatives. The final design features modular separate radiant cells, each with one and two-side fired vertical tubes. The convection section configuration is vertical tube banks enclosed in the radiant channels. Commercial modular plate air preheaters are used. The predicted performance for the integrated advanced heater and Callidus burner is 95 percent efficiency with 9 ppm NOx emissions firing natural gas, and 12 ppm firing refinery gas. The total erected cost is less than a conventional heater with combustion air preheat.

Mason, Howard; Boral, Anindya; Chhotray, San; Martin, Matthew

2006-06-19T23:59:59.000Z

307

Water Efficiency  

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of EnergyEnergyENERGYWomen Owned SmallOf The 2012NuclearBradley Nickell02-03Waste-to-EnergyFraming

308

High-Efficiency Nitride-Based Solid-State Lighting  

SciTech Connect (OSTI)

In this final technical progress report we summarize research accomplished during Department of Energy contract DE-FC26-01NT41203, entitled ''High-Efficiency Nitride-Based Solid-State Lighting''. Two teams, from the University of California at Santa Barbara (Principle Investigator: Dr. Shuji Nakamura) and the Lighting Research Center at Rensselaer Polytechnic Institute (led by Dr. N. Narendran), pursued the goals of this contract from thin film growth, characterization, and packaging/luminaire design standpoints. The UCSB team initially pursued the development of blue gallium nitride (GaN)-based vertical-cavity surface-emitting lasers, as well as ultraviolet GaN-based light emitting diodes (LEDs). In Year 2, the emphasis shifted to resonant-cavity light emitting diodes, also known as micro-cavity LEDs when extremely thin device cavities are fabricated. These devices have very directional emission and higher light extraction efficiency than conventional LEDs. Via the optimization of thin-film growth and refinement of device processing, we decreased the total cavity thickness to less than 1 {micro}m, such that micro-cavity effects were clearly observed and a light extraction efficiency of over 10% was reached. We also began the development of photonic crystals for increased light extraction, in particular for so-called ''guided modes'' which would otherwise propagate laterally in the device and be re-absorbed. Finally, we pursued the growth of smooth, high-quality nonpolar a-plane and m-plane GaN films, as well as blue light emitting diodes on these novel films. Initial nonpolar LEDs showed the expected behavior of negligible peak wavelength shift with increasing drive current. M-plane LEDs in particular show promise, as unpackaged devices had unsaturated optical output power of {approx} 3 mW at 200 mA drive current. The LRC's tasks were aimed at developing the subcomponents necessary for packaging UCSB's light emitting diodes, and packaging them to produce a white light fixture. During the third and final year of the project, the LRC team investigated alternate packaging methods for the white LED device to achieve at least 25 percent more luminous efficacy than traditional white LEDs; conducted optical ray-tracing analyses and human factors studies to determine the best form factor for the white light source under development, in terms of high luminous efficacy and greater acceptance by subjects; and developed a new die encapsulant using silicone-epoxy resins that showed less yellowing and slower degradation. At the conclusion of this project, the LRC demonstrated a new packaging method, called scattered photon extraction (SPE), that produced an average luminous flux and corresponding average efficacy of 90.7 lm and 36.3 lm/W, respectively, compared with 56.5 lm and 22.6 lm/W for a similar commercial white LED package. At low currents, the SPE package emitted white light with an efficacy of over 80 lm/W and had chromaticity values very close to the blackbody locus. The SPE package showed an overall improvement of 61% for this particular comparison, exceeding the LRC's third-year goal of 25% improvement.

Paul T. Fini; Shuji Nakamura

2005-07-30T23:59:59.000Z

309

Low Temperature Combustion Demonstrator for High Efficiency Clean Combustion  

SciTech Connect (OSTI)

The project which extended from November 2005 to May of 2010 demonstrated the application of Low Temperature Combustion (LTC) with engine out NOx levels of 0.2 g/bhp-hr throughout the program target load of 12.6bar BMEP. The project showed that the range of loads could be extended to 16.5bar BMEP, therefore matching the reference lug line of the base 2007 MY Navistar 6.4L V8 engine. Results showed that the application of LTC provided a dramatic improvement over engine out emissions when compared to the base engine. Furthermore LTC improved thermal efficiency by over 5% from the base production engine when using the steady state 13 mode composite test as a benchmark. The key enablers included improvements in the air, fuel injection, and cooling systems made in Phases I and II. The outcome was the product of a careful integration of each component under an intelligent control system. The engine hardware provided the conditions to support LTC and the controller provided the necessary robustness for a stable combustion. Phase III provided a detailed account on the injection strategy used to meet the high load requirements. During this phase, the control strategy was implemented in a production automotive grade ECU to perform cycle-by-cycle combustion feedback on each of the engine cylinders. The control interacted on a cycle base with the injection system and with the Turbo-EGR systems according to their respective time constants. The result was a unique system that could, first, help optimize the combustion system and maintain high efficiency, and secondly, extend the steady state results to the transient mode of operation. The engine was upgraded in Phase IV with a Variable Valve Actuation system and a hybrid EGR loop. The impact of the more versatile EGR loop did not provide significant advantages, however the application of VVA proved to be an enabler to further extend the operation of LTC and gain considerable benefits in fuel economy and soot reduction. Finally, the transient demonstration was performed in Phase IV. The project demonstrated the achievement of meeting US10 emissions without NOx aftertreatment. The successful execution of the project has served to highlight the effectiveness of closely matched combustion predictive tools to engine testing. It has further served to highlight the importance of key technologies and future areas of research and development. In this regard, recommendations are made towards further improvements in the areas of engine hardware, fuel injection systems, controls and fuels.

Ojeda, William de

2010-07-31T23:59:59.000Z

310

A high accuracy computed water line list  

E-Print Network [OSTI]

A computed list of H$_{2}$$^{16}$O infra-red transition frequencies and intensities is presented. The list, BT2, was produced using a discrete variable representation two-step approach for solving the rotation-vibration nuclear motions. It is the most complete water line list in existence, comprising over 500 million transitions (65% more than any other list) and it is also the most accurate (over 90% of all known experimental energy levels are within 0.3 cm$^{-1}$ of the BT2 values). Its accuracy has been confirmed by extensive testing against astronomical and laboratory data. The line list has been used to identify individual water lines in a variety of objects including: comets, sunspots, a brown dwarf and the nova-like object V838 Mon. Comparison of the observed intensities with those generated by BT2 enables physical values to be derived for these objects. The line list can also be used to provide an opacity for models of the atmospheres of M-dwarf stars and assign previously unknown water lines in laboratory spectra.

R. J. Barber; J. Tennyson; G. J. Harris; R. N. Tolchenov

2006-01-11T23:59:59.000Z

311

Low Temperature Combustion Demonstrator for High Efficiency Clean...  

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

NOx after-treatment and with minimized soot Target today's Diesel fuel - Improve break thermal efficiency to 5% over current production - The technology generated in project to...

312

Laclede Gas Company- Residential High Efficiency Heating Rebate Program  

Broader source: Energy.gov [DOE]

Laclede Gas Company offers various rebates to residential customers for investing in energy efficient equipment and appliances. Residential customers can qualify for rebates on boilers, furnaces,...

313

Southwest Gas Corporation- Commercial High-Efficiency Equipment Rebate Program  

Broader source: Energy.gov [DOE]

Southwest Gas Corporation (SWG) offers rebates to commercial customers in Arizona who purchase energy efficient natural gas equipment. Eligible equipment includes natural gas storage and tankless...

314

HIGH-EFFICIENCY NITRIDE-BASED SOLID-STATE LIGHTING  

SciTech Connect (OSTI)

In this semiannual report we summarize the progress obtained in the first six months with the support of DoE contract No.DE-FC26-01NT41203, entitled ''High-Efficiency Nitride-Based Solid-State Lighting''. The two teams, from the University of California at Santa Barbara (Principle Investigator: Dr. Shuji Nakamura) and Rensselaer Polytechnic Institute (led by Dr. N. Narendran), are pursuing the goals of this contract from thin film growth, characterization, and packaging standpoints. The UCSB team has made significant progress in the development of GaN vertical cavity surface-emitting lasers (VCSELs) as well as light-emitting diodes (LEDs) with AlGaN active regions emitting in the ultraviolet (UV). The Rensselaer team has developed target specifications for some of the key parameters for the proposed solid-state lighting system, including a luminous flux requirement matrix for various lighting applications, optimal spectral power distributions, and the performance characteristics of currently available commercial LEDs for eventual comparisons to the devices developed in the scope of this project.

Dr. Paul T. Fini; Prof. Shuji Nakamura

2002-04-30T23:59:59.000Z

315

HIGH-EFFICIENCY NITRIDE-BASED SOLID-STATE LIGHTING  

SciTech Connect (OSTI)

In this annual report we summarize the progress obtained in the first year with the support of DoE contract No.DE-FC26-01NT41203, entitled ''High-Efficiency Nitride-Based Solid-State Lighting''. The two teams, from the University of California at Santa Barbara (Principle Investigator: Dr. Shuji Nakamura) and Rensselaer Polytechnic Institute (led by Dr. N. Narendran), are pursuing the goals of this contract from thin film growth, characterization, and packaging standpoints. The UCSB team has made significant progress in the development of GaN vertical cavity surface-emitting lasers (VCSELs) as well as light-emitting diodes (LEDs) with AlGaN active regions emitting in the ultraviolet (UV). The Rensselaer team has developed target specifications for some of the key parameters for the proposed solid-state lighting system, including a luminous flux requirement matrix for various lighting applications, optimal spectral power distributions, and the performance characteristics of currently available commercial LEDs for eventual comparisons to the devices developed in the scope of this project.

Dr. Paul T. Fini; Prof. Shuji Nakamura

2002-09-01T23:59:59.000Z

316

High efficiency proportional neutron detector with solid liner internal structures  

DOE Patents [OSTI]

A tube-style neutron detector, a panel-style neutron detector incorporating a plurality of tube-style neutron detectors, and a panel-style neutron detector including a plurality of anode wires are provided. A plurality of channels is provided in a neutron detector such that each channel has an inner surface of a coating layer including a neutron-absorbing material. A wire anode is provided at end of each channel so that electrons generated by a charged daughter particle generated by a neutron are collected to detect a neutron-matter interaction. Moderator units can be incorporated into a neutron detector to provide improved detection efficiencies and/or to determine neutron energy spectrum. Gas-based proportional response from the neutron detectors can be employed for special nuclear material (SNM) detection. This neutron detector can provide similar performance to .sup.3He-based detectors without requiring .sup.3He and without containing toxic, flammable, or high-pressure materials.

Kisner, Roger Allen; Holcomb, David Eugene; Brown, Gilbert M.

2014-08-05T23:59:59.000Z

317

Arsenic in your water?: Economists study perceptions of risks from drinking water high in arsenic  

E-Print Network [OSTI]

Arsenic in water?your tx H2O | pg. 27 Story by Kathy Wythe Economists study perceptions of risks from drinking water high in arsenic In several ?hot spots? across the United States people may be drinking water with high levels of naturally... occurring arsenic without understanding the associated risks, according to agricultural economists. ?Many households in arsenic ?hot spots? are in fact being exposed to harmful doses of arsenic,? said Dr. Douglass Shaw, professor of agricultural...

Wythe, Kathy

2010-01-01T23:59:59.000Z

318

High Excitation Transfer Efficiency from Energy Relay Dyes in Dye-Sensitized Solar Cells  

E-Print Network [OSTI]

High Excitation Transfer Efficiency from Energy Relay Dyes in Dye-Sensitized Solar Cells Brian E, TT1, to increase the overall power conversion efficiency of a dye-sensitized solar cell (DSC) from 3 be efficiently implemented in optimized dye-sensitized solar cells, but also highlights the need to design highly

McGehee, Michael

319

ENERGY-EFFICIENT RESOURCE MANAGEMENT FOR HIGH-PERFORMANCE COMPUTING PLATFORMS  

E-Print Network [OSTI]

ENERGY-EFFICIENT RESOURCE MANAGEMENT FOR HIGH-PERFORMANCE COMPUTING PLATFORMS Except where School Engineering #12;ENERGY-EFFICIENT RESOURCE MANAGEMENT FOR HIGH-PERFORMANCE COMPUTING PLATFORMS of the Requirements for the Degree of Doctor of Philosophy Auburn, Alabama August 9, 2008 #12;iii ENERGY-EFFICIENT

Qin, Xiao

320

Advanced Nanomaterials for High-Efficiency Solar Cells  

SciTech Connect (OSTI)

Energy supply has arguably become one of the most important problems facing humankind. The exponential demand for energy is evidenced by dwindling fossil fuel supplies and record-high oil and gas prices due to global population growth and economic development. This energy shortage has significant implications to the future of our society, in addition to the greenhouse gas emission burden due to consumption of fossil fuels. Solar energy seems to be the most viable choice to meet our clean energy demand given its large scale and clean/renewable nature. However, existing methods to convert sun light into electricity are not efficient enough to become a practical alternative to fossil fuels. This DOE project aims to develop advanced hybrid nanomaterials consisting of semiconductor nanoparticles (quantum dots or QDs) supported on graphene for cost-effective solar cells with improved conversion efficiency for harvesting abundant, renewable, clean solar energy to relieve our global energy challenge. Expected outcomes of the project include new methods for low-cost manufacturing of hybrid nanostructures, systematic understanding of their properties that can be tailored for desired applications, and novel photovoltaic cells. Through this project, we have successfully synthesized a number of novel nanomaterials, including vertically-oriented graphene (VG) sheets, three-dimensional (3D) carbon nanostructures comprising few-layer graphene (FLG) sheets inherently connected with CNTs through sp{sup 2} carbons, crumpled graphene (CG)-nanocrystal hybrids, CdSe nanoparticles (NPs), CdS NPs, nanohybrids of metal nitride decorated on nitrogen-doped graphene (NG), QD-carbon nanotube (CNT) and QD-VG-CNT structures, TiO{sub 2}-CdS NPs, and reduced graphene oxide (RGO)-SnO{sub 2} NPs. We further assembled CdSe NPs onto graphene sheets and investigated physical and electronic interactions between CdSe NPs and the graphene. Finally we have demonstrated various applications of these nanomaterials in solar cells (both as photoanodes and counter electrodes), gas sensors, and energy storage devices. This research is potentially transformative since the availability of affordable hybrid nanostructures and their fundamental properties will enable various innovative applications of the multifunctional hybrid nanostructures and thus will accelerate new discoveries and inventions in nanoscience and nanotechnology.

Chen, Junhong [University of Wisconsin-Milwaukee] [University of Wisconsin-Milwaukee

2013-11-29T23:59:59.000Z

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


321

EVALUATION OF A LOW FRICTION - HIGH EFFICIENCY ROLLER BEARING ENGINE  

SciTech Connect (OSTI)

This Low Friction (High Efficiency Roller Bearing) Engine (LFE) report presents the work done by The Timken Company to conduct a technology demonstration of the benefits of replacing hydrodynamic bearings with roller bearings in the crankshaft and camshaft assemblies of an internal combustion engine for the purpose of collecting data sufficient to prove merit. The engines in the present study have been more extensively converted to roller bearings than any previous studies (40 needle roller bearings per engine) to gain understanding of the full potential of application of bearing technology. The project plan called for comparative testing of a production vehicle which was already respected for having demonstrated low engine friction levels with a rollerized version of that engine. Testing was to include industry standard tests for friction, emissions and fuel efficiency conducted on instrumented dynamometers. Additional tests for fuel efficiency, cold start resistance and other measures of performance were to be made in the actual vehicle. Comparative measurements of noise, vibration and harshness (NVH), were planned, although any work to mitigate the suspected higher NVH level in the rollerized engine was beyond the scope of this project. Timken selected the Toyota Avalon with a 3.5L V-6 engine as the test vehicle. In an attempt to minimize cost and fabrication time, a ‘made-from’ approach was proposed in which as many parts as possible would be used or modified from production parts to create the rollerized engine. Timken commissioned its test partner, FEV Engine Technology, to do a feasibility study in which they confirmed that using such an approach was possible to meet the required dimensional restrictions and tolerances. In designing the roller bearing systems for the crank and cam trains, Timken utilized as many production engine parts as possible. The crankshafts were produced from production line forgings, which use Timken steel, modified with special machining and heat treatment. Timken designed and manufactured all of the roller bearing related components such as the thrust bearing package. The production connecting rods and camshafts could not be used for the roller bearing engine, so new ones were produced according to the team’s designs using Timken steel. The remaining miscellaneous components were designed and procured by FEV. Timken prepared a display version of the crankshaft portion of the production engine without connecting rods which could be driven by a motor through a cogged-belt and electrically actuated clutch arrangement. A modified version was also made in which the engine was outfitted with roller bearings on the main bearing positions. Preliminary tests showed that the rollerized engine was running with 1/3 less friction than the standard display engine. Additional friction testing and noise characterization was cut short because of shipping damage to the rollerized engine display and because of other project priorities. The team did successfully demonstrate the ability to package roller bearings satisfactorily in numerous locations in a typical automotive engine. The scope of this project did not include durability demonstration and that subject would have to be addressed in any follow-on work. In the actual test phase, the rollerized engine did show significantly less friction in motored dynamometer tests compared to its production equivalent. The 5-10% improvement measured in this study was about half that seen in other studies. However, the fired test results did not show a reduction in friction which did not match prior experience or expectations. Subsequent teardown and inspection of the rollerized engine revealed potential sources of excessive friction in the experimental application. These features would be eliminated in a design not based on modification of production parts. The team is confident (based on experience) that friction reduction would be realized with proper modifications.

Kolarik, Robert V. II; Shattuck, Charles W.; Copper, Anthony P.

2009-06-30T23:59:59.000Z

322

Ultrathin, high-efficiency, broad-band, omni-acceptance, organic solar cells enhanced by  

E-Print Network [OSTI]

: Three of central challenges in solar cells are high light coupling into solar cell, high light trappingUltrathin, high-efficiency, broad-band, omni- acceptance, organic solar cells enhanced by plasmonic and demonstration of a new ultra-thin high- efficiency organic solar cell (SC), termed "plasmonic cavity

323

Kitchen Appliance Upgrades Improve Water Efficiency at DOD Exchange Facilities: Best Management Practice Case Study #11: Commercial Kitchen Equipment (Brochure)  

SciTech Connect (OSTI)

The Exchange, formerly the Army and Air Force Exchange Service (AAFES), is a joint military activity and the U.S. Department of Defense?s (DOD) oldest and largest retailer. The Exchange is taking a leadership role in water efficiency improvements in their commercial kitchens by integrating water efficiency concepts into the organization?s overall sustainability plan and objectives.

Not Available

2011-09-01T23:59:59.000Z

324

High-Efficiency and Stable White Organic Light-Emitting Diode...  

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

Efficiency and Stable White Organic Light-Emitting Diode Using a Single Emitter High-Efficiency and Stable White Organic Light-Emitting Diode Using a Single Emitter Presenter: Jian...

325

Webinar: Award-Winning LEEP Campaign Sites Demonstrate Big Savings in High Efficiency Parking Lighting  

Broader source: Energy.gov [DOE]

The Lighting Energy Efficiency in Parking (LEEP) Campaign is saving nearly 45 million kilowatt-hours and $4 million annually by upgrading its partners to high efficiency lighting in over 500,000 parking spaces.

326

High Efficiency Clean Combustion in Multi-Cylinder Light-Duty...  

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

Efficiency Clean Combustion in Multi-Cylinder Light-Duty Engines High Efficiency Clean Combustion in Multi-Cylinder Light-Duty Engines 2012 DOE Hydrogen and Fuel Cells Program and...

327

Cost-efficient monitoring of water quality in district heating systems This article examines the monitoring strategy for water quality in a large Danish district  

E-Print Network [OSTI]

Cost-efficient monitoring of water quality in district heating systems This article examines the monitoring strategy for water quality in a large Danish district heating system ­ and makes a proposal for a technical and economic improvement. Monitoring of water quality in district heating systems is necessary

328

High efficiency off-axis current drive by high frequency fast waves  

SciTech Connect (OSTI)

Modeling work shows that current drive can be done off-axis with high efficiency, as required for FNSF and DEMO, by using very high harmonic fast waves (“helicons” or “whistlers”). The modeling indicates that plasmas with high electron beta are needed in order for the current drive to take place off-axis, making DIII-D a highly suitable test vehicle for this process. The calculations show that the driven current is not very sensitive to the launched value of n{sub ?}, a result that can be understood from examination of the evolution of n{sub ?} as the waves propagate in the plasma. Because of this insensitivity, relatively large values (?3) of n{sub ?} can be launched, thereby avoiding some of the problems with mode conversion in the boundary found in some previous experiments. Use of a traveling wave antenna provides a very narrow n{sub ?} spectrum, which also helps avoid mode conversion.

Prater, R.; Pinsker, R. I.; Moeller, C. P. [General Atomics, PO Box 85608, San Diego, California 92186-5608 (United States); Porkolab, M.; Vdovin, V. [Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, Massachusetts 02139 (United States)

2014-02-12T23:59:59.000Z

329

Design and global optimization of high-efficiency thermophotovoltaic systems  

E-Print Network [OSTI]

Despite their great promise, small experimental thermophotovoltaic (TPV) systems at 1000 K generally exhibit extremely low power conversion efficiencies (approximately 1%), due to heat losses such as thermal emission of ...

Bermel, Peter A.

330

High-Efficiency Receivers for Supercritical Carbon Dioxide Cycles...  

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

that is compatible with s-CO2 cycles and modern thermal storage subsystems. Supercritical CO2 Brayton-cycle engines have the potential to increase conversion efficiency to...

331

Materials-Enabled High-Efficiency Diesel Engines (CRADA with...  

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

UT-Battelle for the U.S. Department of Energy Overview Timeline * Develop supporting materials technology to enable Heavy-Duty diesel efficiency of 55%, while meeting prevailing...

332

High Efficiency Full Expansion (FEx) Engine for Automotive Application...  

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

Frontier in Engine Efficiency Two-Stroke Uniflow Turbo-Compound IC Engine The Opposed-Piston Two-Stroke Engine Alternative: Performance and Emissions Results in a Medium-Duty...

333

Improved Water and Nutrient Management Through HighFrequency Irrigation  

E-Print Network [OSTI]

High frequency irrigation implies the uniform, frequent application of water to crops. The fequency may range from several irrigations per week to daily irrigation to even several irrigations per day in greenhouse and nursery settings. Most...

Howell, T. A.; Brown, K. W.; Newton, R. J.; Redden, D. L.; McFarland, M. J.

334

Water and Solute Flow in a Highly-Structured Soil  

E-Print Network [OSTI]

Prevention of groundwater contamination by agricultural activities is a high priority in the United States. Water and contaminants often follow particular flow paths through the soil that lead to rapid movement of pesticides out of the rootzone...

Hallmark, C. Tom; Wilding, Larry P.; McInnes, Kevin J.; Heuvelman, Willem J.

335

Experimental Analysis of Water Based Drilling Fluid Aging Processes at High Temperature and High Pressure Conditions  

E-Print Network [OSTI]

! ! EXPERIMENTAL ANALYSIS OF WATER BASED DRILLING FLUID AGING PROCESSES AT HIGH TEMPERATURE AND HIGH PRESSURE CONDITIONS A Thesis by BRANDON SCOTT ZIGMOND Submitted to the Office of Graduate Studies of Texas A&M University... Temperature and High Pressure Conditions Copyright 2012 Brandon Scott Zigmond ! ! EXPERIMENTAL ANALYSIS OF WATER BASED DRILLING FLUID AGING PROCESSES AT HIGH TEMPERATURE AND HIGH PRESSURE CONDITIONS A Thesis by BRANDON SCOTT ZIGMOND Submitted...

Zigmond, Brandon

2012-10-19T23:59:59.000Z

336

High-efficiency He-3 proportional counter for the detection of delayed neutrons  

SciTech Connect (OSTI)

The present work examines a high-neutron efficiency detector used to measure delayed neutron techniques. The measurement of delayed neutrons requires a detector system that has high neutron efficiency and a low dead- time. The detection system must also have low gamma-ray sensitivity, and in addition must be insensitive to small sample displacement. The operating characteristics of the high-efficiency He-3 proportional counter used for the measurement of {beta}{sub i}-delayed neutrons is reported here.

Loaiza, D.J.

1998-03-01T23:59:59.000Z

337

Highly-Efficient Selective Metamaterial Absorber for High-Temperature Solar Thermal Energy Harvesting  

E-Print Network [OSTI]

In this work, a metamaterial selective solar absorber made of nanostructured titanium gratings deposited on an ultrathin MgF2 spacer and a tungsten ground film is proposed and experimentally demonstrated. Normal absorptance of the fabricated solar absorber is characterized to be higher than 90% in the UV, visible and, near infrared (IR) regime, while the mid-IR emittance is around 20%. The high broadband absorption in the solar spectrum is realized by the excitation of surface plasmon and magnetic polariton resonances, while the low mid-IR emittance is due to the highly reflective nature of the metallic components. Further directional and polarized reflectance measurements show wide-angle and polarization-insensitive high absorption within solar spectrum. Temperature-dependent spectroscopic characterization indicates that the optical properties barely change at elevated temperatures up to 350{\\deg}C. The solar-to-heat conversion efficiency with the fabricated metamaterial solar absorber is predicted to be 78%...

Wang, Hao; Mitchell, Arnan; Rosengarten, Gary; Phelan, Patrick; Wang, Liping

2014-01-01T23:59:59.000Z

338

Broadband Quantum Efficiency Enhancement in High Index Nanowires Resonators  

E-Print Network [OSTI]

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...

Yang, Yiming; Hyatt, Steven; Yu, Dong

2015-01-01T23:59:59.000Z

339

Development of high efficiency ball-bearing turbocharger  

SciTech Connect (OSTI)

Turbochargers have become very popular on passenger cars since the first mass-produced turbocharged passenger cars were put on market in Japan in 1979. Turbo lag is one of the most serious problem since the first mass-production started. Several new technologies such as a variable geometry turbocharger, ceramic turbocharger, etc. have been introduced to improve acceleration performance. A variable geometry turbocharger changes the area of gas flow passage and increases exhaust gas speed at low engine speed. A ceramic turbocharger reduces inertia moment of a turbine wheel and shaft. Turbocharger mechanical efficiency has equal importance as compressor efficiency and turbine efficiency. This paper describes the test results of ball bearing turbochargers.

Miyashita, K.; Kurasawa, M.; Matsuoka, H.; Ikeya, N.

1987-01-01T23:59:59.000Z

340

Design and global optimization of high-efficiency solar thermal systems with tungsten cermets  

E-Print Network [OSTI]

Solar thermal, thermoelectric, and thermophotovoltaic (TPV) systems have high maximum theoretical efficiencies; experimental systems fall short because of losses by selective solar absorbers and TPV selective emitters. To ...

Chester, David A.

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


341

Vehicle Technologies Office Merit Review 2014: High Efficiency GDI Engine Research, with Emphasis on Ignition Systems  

Broader source: Energy.gov [DOE]

Presentation given by Argonne National Laboratory at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about high efficiency...

342

A High-Efficiency Grid-Tie Battery Energy Storage System.  

E-Print Network [OSTI]

??Lithium-ion based battery energy storage system has become one of the most popular forms of energy storage system for its high charge and discharge efficiency… (more)

Qian, Hao

2011-01-01T23:59:59.000Z

343

High efficient electrical stimulation of hippocampal slices with vertically aligned carbon nanofiber microbrush array  

E-Print Network [OSTI]

9295-7 High efficient electrical stimulation of hippocampalE. D. de Asis Jr. Departments of Electrical Engineering andaligned carbon nanofiber . Electrical stimulation . Neural

2009-01-01T23:59:59.000Z

344

Scientists Confirm Robustness of Key Component in Ultra-High-Efficiency Solar Cell (Fact Sheet)  

SciTech Connect (OSTI)

Scientists developed and tested a new, stable 1-eV metamorphic junction for a high efficiency multijunction III-V solar cell for CPV application.

Not Available

2011-05-01T23:59:59.000Z

345

High efficiency resonant dc/dc converter for solar power applications .  

E-Print Network [OSTI]

??This thesis presents a new topology for a high efficiency dc/dc resonant power converter that utilizes a resistance compression network to provide simultaneous zero voltage… (more)

Inam, Wardah

2013-01-01T23:59:59.000Z

346

Northwest Energy Efficient Manufactured Housing Program: High Performance Manufactured Home Prototyping and Construction Development  

SciTech Connect (OSTI)

The Building America Partnership for Improved Residential Construction, the Bonneville Power Administration (BPA), and Northwest Energy Works (NEW), the current Northwest Energy Efficient Manufactured Housing Program (NEEM) administrator, have been collaborating to conduct research on new specifications that would improve on the energy requirements of a NEEM home. In its role as administrator, NEW administers the technical specs, performs research and engineering analysis, implements ongoing construction quality management procedures, and maintains a central database with home tracking. This project prototyped and assessed the performances of cost-effective high performance building assemblies and mechanical systems that are not commonly deployed in the manufacturing setting. The package of measures is able to reduce energy used for space conditioning, water heating and lighting by 50 percent over typical manufactured homes produced in the northwest.

Hewes, T.; Peeks, B.

2013-11-01T23:59:59.000Z

347

High-Efficiency Solar Cells for Large-Scale Electricity Generation  

SciTech Connect (OSTI)

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.

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

348

Review of International Methods of Test to Rate the Efficiency of Water Heaters  

E-Print Network [OSTI]

water heaters, heat-pump water heaters, and instantaneous (Wasted water Solar Heat pump water heater Australia/New

Lutz, Jim

2012-01-01T23:59:59.000Z

349

Exploring MapReduce Efficiency with Highly-Distributed Data  

E-Print Network [OSTI]

is also distributed, e.g. data is collected in separate data center loca- tions, the most efficient-performance computing over large data sets in large-scale platforms. Fueling this growth is the emergence of cloud several distributed data sources, i.e., large-scale data could be collected in separate data center

Chandra, Abhishek

350

Design and global optimization of high-efficiency thermophotovoltaic  

E-Print Network [OSTI]

). © 2010 Optical Society of America OCIS codes: (230.5298) Photonic crystals; (350.6050) Solar energy, PhC-based designs present a set of non-convex optimization problems requiring efficient objective micro-TPV generators and solar thermal TPV systems. Micro-TPV reactors experience up to a 27-fold

351

High efficiency thin-film multiple-gap photovoltaic device  

DOE Patents [OSTI]

A photovoltaic device includes at least two solar cells made from Group IV elements or their alloys in the amorphous state mounted on a substrate. The outermost or first cell has a larger bandgap than the second cell. Various techniques are utilized to improve the efficiency of the device.

Dalal, Vikram L. (Newark, DE)

1983-01-01T23:59:59.000Z

352

Small core axial compressors for high efficiency jet aircraft  

E-Print Network [OSTI]

This thesis quantifies mechanisms that limit efficiency in small core axial compressors, defined here as compressor exit corrected flow between 1.5 and 3.0 lbm/s. The first part of the thesis describes why a small engine ...

DiOrio, Austin Graf

2012-01-01T23:59:59.000Z

353

Efficient Techniques for High-Speed Elliptic Curve Cryptography  

E-Print Network [OSTI]

Gebotys Department of Electrical and Computer Engineering, University of Waterloo, Canada, {plonga] is an integer, is the central and most time-consuming operation in Elliptic Curve Cryptography (ECC). Hence, its gained increasing importance in recent years. In this work, we combine several efficient techniques

354

Design of high efficiency blowers for future aerosol applications  

E-Print Network [OSTI]

Blower performance measurement test-rig. ....................................................47 xii Page Figure 20 Pressure recovery for different venturi types (FLOW-DYNE Engineering... consumption curves for final-prototype. ........87 Figure 45 Experimental efficiency( )EXP values for final-prototype 70xz_28y. ............88 Figure A-1 Venturi calibration chart...

Chadha, Raman

2007-04-25T23:59:59.000Z

355

High Efficiency Generation of Hydrogen Fuels using Nuclear Power Annual Report August, 2000 - July 2001  

SciTech Connect (OSTI)

OAK B188 High Efficiency Generation of Hydrogen Fuels using Nuclear Power Annual Report August 2000 - July 2001. Currently no large scale, cost-effective, environmentally attractive hydrogen production process is available for commercialization nor has such a process been identified. Hydrogen is a promising energy carrier, which potentially could replace the fossil fuels used in the transportation sector of our economy. Carbon dioxide emissions from fossil fuel combustion are thought to be responsible for global warming. The purpose of this work is to determine the potential for efficient, cost-effective, large-scale production of hydrogen utilizing high temperature heat from an advanced nuclear power station. The benefits of this work will include the generation of a low-polluting transportable energy feedstock in an efficient method that has little or no implication for greenhouse gas emissions from a primary energy source whose availability and sources are domestically controlled. This will help to ensure energy for a future transportation/energy infrastructure that is not influenced/controlled by foreign governments. This report describes work accomplished during the second year (Phase 2) of a three year project whose objective is to ''define an economically feasible concept for production of hydrogen, by nuclear means, using an advanced high temperature nuclear reactor as the energy source.'' The emphasis of the first year (Phase 1) was to evaluate thermochemical processes which offer the potential for efficient, cost-effective, large-scale production of hydrogen from water, in which the primary energy input is high temperature heat from an advanced nuclear reactor and to select one (or, at most, three) for further detailed consideration. Phase 1 met its goals and did select one process, the sulfur-iodine process, for investigation in Phases 2 and 3. The combined goals of Phases 2 and 3 were to select the advanced nuclear reactor best suited to driving the selected thermochemical process and to define the selected reactor and process to the point that capital costs, operating costs and the resultant cost of hydrogen can be estimated. During original contract negotiation, it was necessary to reduce work scope to meet funding limits. As a result, the reactor interface and process will not be iterated to the point that only hydrogen is produced. Rather, hydrogen and electricity will be co-generated and the hydrogen cost will be stated as a function of the electricity sales price.

Brown, L.C.

2002-11-01T23:59:59.000Z

356

CFD optimization study of high-efficiency jet ejectors  

E-Print Network [OSTI]

?????????.. 12 Internal Flow Field??????????.??? 14 Shock Wave???????????????.. 15 Multi-Stage Jet Ejector System???????.? 18 III THEORY???????????????????.. 22... CASES?... 253 APPENDIX D SALT WATER PROPERTIES AND THE DETAIL DATA OF THE DESALINATION CASE STUDY??.. 258 APPENDIX E THE PROCEDURE TO CALCULATE THE INLET MOTIVE-STREAM PRESSURE?????????.. 266 APPENDIX F RESULT...

Watanawanavet, Somsak

2009-05-15T23:59:59.000Z

357

High-efficiency large-area CdTe panels  

SciTech Connect (OSTI)

The objective of this three year effort has been to develop an improved materials technology and fabrication process for limited volume production of 1 ft{sup 2} and 4 ft{sup 2} CdS/CdTe photovoltaic modules. The module stability objective by the end of this three year subcontract was to develop techniques to provide ten year life exploration with no greater than 10% degradation. In order to achieve these efficiency and stability objectives, the research program has been separated into tasks including: (1) analysis and characterization of CdS/CdTe Devices; (2) performance optimization on small cells; (3) encapsulation and stability testing; and (4) module efficiency optimization. 27 refs., 18 figs., 3 tabs.

Albright, S.P.; Chamberlin, R.R.; Jordan, J.F. (Photon Energy, Inc., El Paso, TX (USA))

1990-11-01T23:59:59.000Z

358

High efficiency waste to energy facility -- Pilot plant design  

SciTech Connect (OSTI)

Waste To Energy facilities are commonly acceptable to the environment and give benefits in two main areas: one is a hygienic waste disposal and another is waste heat energy recovery to save fossil fuel consumption. Recovered energy is used for electricity supply, and it is required to increase the efficiency of refuse to electric energy conversion, and to spread the plant construction throughout the country of Japan, by the government. The national project started in 1992, and pilot plant design details were established in 1995. The objective of the project is to get 30% of energy conversion efficiency through the measure by raising the steam temperature and pressure to 500 C and 9.8 MPa respectively. The pilot plant is operating under the design conditions, which verify the success of applied technologies. This paper describes key technologies which were used to design the refuse burning boiler, which generates the highest steam temperature and pressure steam.

Orita, Norihiko; Kawahara, Yuuzou; Takahashi, Kazuyoshi; Yamauchi, Toru; Hosoda, Takuo

1998-07-01T23:59:59.000Z

359

Review of High Temperature Water and Steam Cooled Reactor Concepts  

SciTech Connect (OSTI)

This review summarizes design concepts of supercritical-pressure water cooled reactors (SCR), nuclear superheaters and steam cooled fast reactors from 1950's to the present time. It includes water moderated supercritical steam cooled reactor, SCOTT-R and SC-PWR of Westinghouse, heavy water moderated light water cooled SCR of GE, SCLWR and SCFR of the University of Tokyo, B-500SKDI of Kurchatov Institute, CANDU -X of AECL, nuclear superheaters of GE, subcritical-pressure steam cooled FBR of KFK and B and W, Supercritical-pressure steam cooled FBR of B and W, subcritical-pressure steam cooled high converter by Edlund and Schultz and subcritical-pressure water-steam cooled FBR by Alekseev. This paper is prepared based on the previous review of SCR2000 symposium, and some author's comments are added. (author)

Oka, Yoshiaki [Nuclear Engineering Research Laboratory, The University of Tokyo, 3-1, Hongo 7-Chome, Bunkyo-ku (Japan)

2002-07-01T23:59:59.000Z

360

Development of Enabling Technologies for High Efficiency, Low Emissions  

Energy Savers [EERE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of Inspector General Office of Audit Services AuditTransatlantic RelationsDepartment ofEfficiency |Homogeneous

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


361

Quantum Dot Solar Cells: High Efficiency through Multiple Exciton Generation  

SciTech Connect (OSTI)

Impact ionization is a process in which absorbed photons in semiconductors that are at least twice the bandgap can produce multiple electron-hole pairs. For single-bandgap photovoltaic devices, this effect produces greatly enhanced theoretical thermodynamic conversion efficiencies that range from 45-85%, depending upon solar concentration, the cell temperature, and the number of electron-hole pairs produced per photon. For quantum dots (QDs), electron-hole pairs exist as excitons. We have observed astoundingly efficient multiple exciton generation (MEG) in QDs of PbSe (bulk Eg = 0.28 eV), ranging in diameter from 3.9 to 5.7nm (Eg = 0.73, 0.82, and 0.91 eV, respectively). The effective masses of electron and holes are about equal in PbSe, and the onset for efficient MEG occurs at about three times the QD HOMO-LUMO transition (its ''bandgap''). The quantum yield rises quickly after the onset and reaches 300% at 4 x Eg (3.64 eV) for the smallest QD; this means that every QD in the sample produces three electron-hole pairs/photon.

Hanna, M. C.; Ellingson, R. J.; Beard, M.; Yu, P.; Micic, O. I.; Nozik, A. J.; c.

2005-01-01T23:59:59.000Z

362

Development of Enabling Technologies for High Efficiency, Low...  

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

high BMEP * Robust combustion control - Transient control of HCCI - Combustion feedback sensors - Combustion mode switching Gap Analysis * Evaluate Production readiness *...

363

Demonstration of a Highly Efficient Solid Oxide Fuel Cell Power System Using Adiabatic Steam Reforming and Anode Gas Recirculation  

SciTech Connect (OSTI)

Solid oxide fuel cells (SOFC) are currently being developed for a wide variety of applications because of their high efficiency at multiple power levels. Applications for SOFCs encompass a large range of power levels including 1-2 kW residential combined heat and power applications, 100-250 kW sized systems for distributed generation and grid extension, and MW-scale power plants utilizing coal. This paper reports on the development of a highly efficient, small-scale SOFC power system operating on methane. The system uses adiabatic steam reforming of methane and anode gas recirculation to achieve high net electrical efficiency. The anode exit gas is recirculated and all of the heat and water required for the endothermic reforming reaction are provided by the anode gas emerging from the SOFC stack. Although the single-pass fuel utilization is only about 55%, because of the anode gas recirculation the overall fuel utilization is up to 93%. The demonstrated system achieved gross power output of 1650 to 2150 watts with a maximum net LHV efficiency of 56.7% at 1720 watts. Overall system efficiency could be further improved to over 60% with use of properly sized blowers.

Powell, Michael R.; Meinhardt, Kerry D.; Sprenkle, Vincent L.; Chick, Lawrence A.; Mcvay, Gary L.

2012-05-01T23:59:59.000Z

364

Energy-Efficient Pipeline Templates for High-Performance Asynchronous Circuits  

E-Print Network [OSTI]

A Energy-Efficient Pipeline Templates for High-Performance Asynchronous Circuits Basit Riaz Sheikh and Rajit Manohar, Cornell University We present two novel energy-efficient pipeline templates for high is presented, which results in significant latency and energy savings especially as the number of outputs

Manohar, Rajit

365

Silicon Photodiodes for High-Efficiency Low-Energy Electron Detection  

E-Print Network [OSTI]

Silicon Photodiodes for High-Efficiency Low-Energy Electron Detection Agata Saki, Lis K. Nanver, T--Solid-state electron detectors have been fabricated using a p+ n silicon photodiode where the p+ region is created near theoretical efficiency at high electron energies. The photodiodes have outstanding performance

Technische Universiteit Delft

366

High throughput energy efficient multi-FFT architecture on FPGAs (Draft)  

E-Print Network [OSTI]

computing, High throughput FFT, Energy efficient design I. INTRODUCTION As FPGAs are programmed specifically in spread spec- trum receiver [4]. In the design of high throughput FFT architectures, energy-efficient design techniques can be used to maximize performance under power dissipation constraints. The power

Prasanna, Viktor K.

367

NANOSTRUCTURED SOLAR CELLS FOR HIGH EFFICIENCY PHOTOVOLTAICS Christiana B. Honsberg1  

E-Print Network [OSTI]

for solar energy conversion. NANOSTRUCTURED SOLAR CELLS Nanostructured solar cells offer several advantages to contribute to high efficiency devices NEW CONCEPTS FOR SOLAR CELLS An important advantage for nanostructuredNANOSTRUCTURED SOLAR CELLS FOR HIGH EFFICIENCY PHOTOVOLTAICS Christiana B. Honsberg1 , Allen M

Honsberg, Christiana

368

Energy Efficient Phase Change Memory Based Main Memory for Future High Performance Systems  

E-Print Network [OSTI]

hybrid system using a commodity DRAM cache. Keywords-Memory Controller, DRAM, PCM, Energy I. INTRODUCTIONEnergy Efficient Phase Change Memory Based Main Memory for Future High Performance Systems Abstract system of similar storage size. Our proposed system is highly energy efficient and provides 35

Conte, Thomas M.

369

Heavy Duty HCCI Development Activities - DOE High Efficiency Clean  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional Subject:Ground Hawaii CleanHeat Pump Water Heaters|

370

Analysis of space heating and domestic hot water systems for energy-efficient residential buildings  

SciTech Connect (OSTI)

An analysis of the best ways of meeting the space heating and domestic hot water (DHW) needs of new energy-efficient houses with very low requirements for space heat is provided. The DHW load is about equal to the space heating load in such houses in northern climates. The equipment options which should be considered are discussed, including new equipment recently introduced in the market. It is concluded that the first consideration in selecting systems for energy-efficient houses should be identification of the air moving needs of the house for heat distribution, heat storage, ventilation, and ventilative cooling. This is followed, in order, by selection of the most appropriate distribution system, the heating appliances and controls, and the preferred energy source, gas, oil, or electricity.

Dennehy, G

1983-04-01T23:59:59.000Z

371

Current-matched high-efficiency, multijunction monolithic solar cells  

DOE Patents [OSTI]

The efficiency of a two-junction (cascade) tandem photovoltaic device is improved by adjusting (decreasing) the top cell thickness to achieve current matching. An example of the invention was fabricated out of Ga.sub.0.52 In.sub.0.48 P and GaAs. Additional lattice-matched systems to which the invention pertains include Al.sub.x Ga.sub.1-x /GaAS (x= 0.3-0.4), GaAs/Ge and Ga.sub.y In.sub.l-y P/Ga.sub.y+0.5 In.sub.0.5-y As (0

Olson, Jerry M. (Lakewood, CO); Kurtz, Sarah R. (Golden, CO)

1993-01-01T23:59:59.000Z

372

Achieving High Efficiency at 2010 Emissions | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-Up fromDepartment of Energy 601DepartmentContract andthe LosUsing CFDHigh Efficiency

373

Enabling the Next Generation of High Efficiency Engines  

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

optimization methods, and reduced models for on-board controls 15 Leadership High Performance Computing* (HPC) has potential to accelerate design and development at an...

374

Effects of long-term water stress on net photosynthesis, growth and water-use efficiency of conifers in the field  

E-Print Network [OSTI]

Effects of long-term water stress on net photosynthesis, growth and water-use efficiency the highest net photosynthesis PICEA and thus also 'the fastest growth. Douglas fir was superior to spruce into consideration. Thus, the reduction in net photosynthesis was always greater on long and sunny summer days

Paris-Sud XI, Université de

375

The Center for Water-Energy Efficiency is a not-for-profit research and development unit at the University of California, Davis, leading innovations in  

E-Print Network [OSTI]

The Center for Water-Energy Efficiency is a not-for-profit research and development unit at the University of California, Davis, leading innovations in water and energy efficient technologies and policies of integrated water and energy efficiency. CWEE AFFILIATE GIFT PROGRAM Supporting innovations in integrated

California at Davis, University of

376

High-Tech Means High-Efficiency: The Business Case for EnergyManagement in High-Tech Industries  

SciTech Connect (OSTI)

In the race to apply new technologies in ''high-tech'' facilities such as data centers, laboratories, and clean rooms, much emphasis has been placed on improving service, building capacity, and increasing speed. These facilities are socially and economically important, as part of the critical infrastructure for pharmaceuticals,electronics, communications, and many other sectors. With a singular focus on throughput, some important design issues can be overlooked, such as the energy efficiency of individual equipment (e.g., lasers, routers and switches) as well as the integration of high-tech equipment into the power distribution system and the building envelope. Among technology-based businesses, improving energy efficiency presents an often untapped opportunity to increase profits, enhance process control,maximize asset value, improve the work place environment, and manage a variety of business risks. Oddly enough, the adoption of energy efficiency improvements in this sector lags behind many others. As a result, millions of dollars are left on the table with each year ofoperation.

Shanshoian, Gary; Blazek, Michele; Naughton, Phil; Seese, RobertS.; Mills, Evan; Tschudi, William

2005-11-15T23:59:59.000Z

377

Efficient CO2 Fixation Pathways: Energy Plant: High Efficiency Photosynthetic Organisms  

SciTech Connect (OSTI)

PETRO Project: UCLA is redesigning the carbon fixation pathways of plants to make them more efficient at capturing the energy in sunlight. Carbon fixation is the key process that plants use to convert carbon dioxide (CO2) from the atmosphere into higher energy molecules (such as sugars) using energy from the sun. UCLA is addressing the inefficiency of the process through an alternative biochemical pathway that uses 50% less energy than the pathway used by all land plants. In addition, instead of producing sugars, UCLA’s designer pathway will produce pyruvate, the precursor of choice for a wide variety of liquid fuels. Theoretically, the new biochemical pathway will allow a plant to capture 200% as much CO2 using the same amount of light. The pathways will first be tested on model photosynthetic organisms and later incorporated into other plants, thus dramatically improving the productivity of both food and fuel crops.

None

2012-01-01T23:59:59.000Z

378

Enabling High Efficiency Clean Combustion | 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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarly Career Scientists'Montana.Program - LibbyofThisStatementNOTElectricityofWater DemandsReleaseAs part

379

Heavy-Duty Engine Combustion Optimization for High Thermal Efficiency  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional Subject:Ground Hawaii CleanHeat Pump WaterPresentationTargeting

380

Highly efficient greenish-blue platinum-based phosphorescent organic light-emitting diodes on a high triplet energy platform  

SciTech Connect (OSTI)

We have demonstrated high-efficiency greenish-blue phosphorescent organic light-emitting diodes (PHOLEDs) based on a dimesitylboryl-functionalized C^N chelate Pt(II) phosphor, Pt(m-Bptrz)(t-Bu-pytrz-Me). Using a high triplet energy platform and optimized double emissive zone device architecture results in greenish-blue PHOLEDs that exhibit an external quantum efficiency of 24.0% and a power efficiency of 55.8?lm/W. This record high performance is comparable with that of the state-of-the-art Ir-based sky-blue organic light-emitting diodes.

Chang, Y. L., E-mail: yilu.chang@mail.utoronto.ca; Gong, S., E-mail: sgong@chem.utoronto.ca; White, R.; Lu, Z. H., E-mail: zhenghong.lu@utoronto.ca [Department of Materials Science and Engineering, University of Toronto, 184 College St., Toronto, Ontario M5S 3E4 (Canada); Wang, X.; Wang, S., E-mail: wangs@chem.queensu.ca [Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario K7L 3N6 (Canada); Yang, C. [Department of Chemistry, Wuhan University, Wuhan 430072 (China)

2014-04-28T23:59:59.000Z

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


381

A high-efficiency indirect lighting system utilizing the solar 1000 sulfur lamp  

SciTech Connect (OSTI)

High-lumen light sources represent unique challenges and opportunities for the design of practical and efficient interior lighting systems. High-output sources require a means of large-scale distribution and avoidance of high-luminance glare while providing efficient delivery. An indirect lighting system has been developed for use with a 1,000 Watt sulfur lamp that efficiently utilizes the high-output source to provide quality interior lighting. This paper briefly describes the design and initial testing of this new system.

Siminovitch, M.; Gould, C.; Page, E.

1997-06-01T23:59:59.000Z

382

High Temperature Electrolysis for Efficient Hydrogen Production from Nuclear Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional Subject:Ground Hawaii HIGH PERFORMANCE andHigh Risk PlanD D eHigh

383

Twin-screw tanker designed for high efficiency  

SciTech Connect (OSTI)

In late 1994, the Ching Fu shipyard in Taiwan delivered a chemical tanker to Fram Shipping, for operations around Northern Europe for Norsk Hydro. The 13000 dwt tanker design is optimized to have the lowest possible operational cost for the given dead-weight capacity. Waertsilae Propulsion has from an early stage contributed to the development of the propulsion system. The company proposed the Waertsilae Propac concept, including the hydrodynamic design and the supply of the main components. The propeller was designed using in-house computer programs, and the results confirmed by model tests, both at Danish Maritime Institute (DMI) in Copenhagen, and at SSPA Maritime Consulting in Gothenburg. The hull form for the tanker was optimized by a special bulb design to reduce the wave resistance. The vessel is also designed with a special twin skeg arrangement in the stern. This solution allows for two large and efficient propellers to be installed.

NONE

1995-11-01T23:59:59.000Z

384

High-efficiency neutron detectors and methods of making same  

DOE Patents [OSTI]

Neutron detectors, advanced detector process techniques and advanced compound film designs have greatly increased neutron-detection efficiency. One embodiment of the detectors utilizes a semiconductor wafer with a matrix of spaced cavities filled with one or more types of neutron reactive material such as 10B or 6LiF. The cavities are etched into both the front and back surfaces of the device such that the cavities from one side surround the cavities from the other side. The cavities may be etched via holes or etched slots or trenches. In another embodiment, the cavities are different-sized and the smaller cavities extend into the wafer from the lower surfaces of the larger cavities. In a third embodiment, multiple layers of different neutron-responsive material are formed on one or more sides of the wafer. The new devices operate at room temperature, are compact, rugged, and reliable in design.

McGregor, Douglas S.; Klann, Raymond

2007-01-16T23:59:59.000Z

385

High-efficiency spectral purity filter for EUV lithography  

DOE Patents [OSTI]

An asymmetric-cut multilayer diffracts EUV light. A multilayer cut at an angle has the same properties as a blazed grating, and has been demonstrated to have near-perfect performance. Instead of having to nano-fabricate a grating structure with imperfections no greater than several tens of nanometers, a thick multilayer is grown on a substrate and then cut at an inclined angle using coarse and inexpensive methods. Effective grating periods can be produced this way that are 10 to 100 times smaller than those produced today, and the diffraction efficiency of these asymmetric multilayers is higher than conventional gratings. Besides their ease of manufacture, the use of an asymmetric multilayer as a spectral purity filter does not require that the design of an EUV optical system be modified in any way, unlike the proposed use of blazed gratings for such systems.

Chapman, Henry N. (Livermore, CA)

2006-05-23T23:59:59.000Z

386

Second Generation Advanced Reburning for High Efficiency NOx Control  

SciTech Connect (OSTI)

This project is designed to develop a family of novel NO{sub x} control technologies, called Second Generation Advanced Reburning (SGAR) which has the potential to achieve 90+% NO{sub x} control in coal-fired boilers at a significantly lower cost than SCR. The twelfth reporting period in Phase II (July 3-October 15, 2000) included design validation AR-Lean tests (Task No.2.6) in the 10 x 10{sup 6} Btu/hr Tower Furnace. The objective of tests was to determine the efficiency of AR-Lean at higher than optimum OFA/N-Agent injection temperatures in large pilot-scale combustion facility. Tests demonstrated that co-injection of urea with overfire air resulted in NO{sub x} reduction. However, observed NO{sub x} reduction was smaller than that under optimum conditions.

Roy Payne; Lary Swanson; Antonio Marquez; Ary Chang; Vladimir M. Zamansky; Pete M. Maly; Vitali V. Lissianski

2000-09-30T23:59:59.000Z

387

Development of a high-efficiency solar micro-inverter  

E-Print Network [OSTI]

In typical solar power installations, multiple modules are connected to the grid through a single high-power inverter. However, an alternative approach is to connect each solar module directly to the grid through a ...

Hayman, Alexander Khaled

2009-01-01T23:59:59.000Z

388

Towards a high-efficiency micro-thermophotovoltaic generator  

E-Print Network [OSTI]

Hydrocarbon fuels have such a high energy density that even a relatively inefficient converter of chemical energy into electrical can significantly exceed the energy density of state- of-the-art batteries. This work attempts ...

Walker, Chan (Walker R.)

2010-01-01T23:59:59.000Z

389

High Efficient Clean Combustion for SuperTruck  

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

bar FIE + Direct Air to EGR + Controls Direct Air to EGR + Combustion System + 2 Stage Turbo + >2600 bar FIE 2 Stage Turbo + Low P EGR + Calibration Low P, High Flow Rate...

390

High Thermal Efficiency and Low Emissions with Supercritical Gasoline  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional Subject:Ground Hawaii HIGH PERFORMANCE andHighWells

391

Solar High Temperature Water-Splitting Cycle with Quantum Boost  

SciTech Connect (OSTI)

A sulfur family chemical cycle having ammonia as the working fluid and reagent was developed as a cost-effective and efficient hydrogen production technology based on a solar thermochemical water-splitting cycle. The sulfur ammonia (SA) cycle is a renewable and sustainable process that is unique in that it is an all-fluid cycle (i.e., with no solids handling). It uses a moderate temperature solar plant with the solar receiver operating at 800°C. All electricity needed is generated internally from recovered heat. The plant would operate continuously with low cost storage and it is a good potential solar thermochemical hydrogen production cycle for reaching the DOE cost goals. Two approaches were considered for the hydrogen production step of the SA cycle: (1) photocatalytic, and (2) electrolytic oxidation of ammonium sulfite to ammonium sulfate in aqueous solutions. Also, two sub-cycles were evaluated for the oxygen evolution side of the SA cycle: (1) zinc sulfate/zinc oxide, and (2) potassium sulfate/potassium pyrosulfate. The laboratory testing and optimization of all the process steps for each version of the SA cycle were proven in the laboratory or have been fully demonstrated by others, but further optimization is still possible and needed. The solar configuration evolved to a 50 MW(thermal) central receiver system with a North heliostat field, a cavity receiver, and NaCl molten salt storage to allow continuous operation. The H2A economic model was used to optimize and trade-off SA cycle configurations. Parametric studies of chemical plant performance have indicated process efficiencies of ~20%. Although the current process efficiency is technically acceptable, an increased efficiency is needed if the DOE cost targets are to be reached. There are two interrelated areas in which there is the potential for significant efficiency improvements: electrolysis cell voltage and excessive water vaporization. Methods to significantly reduce water evaporation are proposed for future activities. Electrolysis membranes that permit higher temperatures and lower voltages are attainable. The oxygen half cycle will need further development and improvement.

Taylor, Robin [SAIC] [SAIC; Davenport, Roger [SAIC] [SAIC; Talbot, Jan [UCSD] [UCSD; Herz, Richard [UCSD] [UCSD; Genders, David [Electrosynthesis Co.] [Electrosynthesis Co.; Symons, Peter [Electrosynthesis Co.] [Electrosynthesis Co.; Brown, Lloyd [TChemE] [TChemE

2014-04-25T23:59:59.000Z

392

An International Survey of Electric Storage Tank Water Heater Efficiency and Standards  

E-Print Network [OSTI]

history of promoting heat pump water heaters (HPWH) throughwater heaters, and heat pump water heaters are not typical.water heaters, heat pump water heater (HPWH) technology

Johnson, Alissa

2013-01-01T23:59:59.000Z

393

High efficiency resonance ionization mass spectrometric analysis by external laser cavity enhancement techniques  

SciTech Connect (OSTI)

The demand to measure high dynamic range isotope ratios on small samples with resonance ionization mass spectrometry (RIMS) continues to increase. This paper discusses high ionization efficiency methods which can be applied to continuous wave (cw) RIMS to potentially achieve several tens of percent ionization efficiencies for certain elements. The primary technique under development to achieve this is an external laser cavity which can generate very high circulating laser powers. 12 refs., 3 figs.

Johnson, S.G.; Rios, E.L.; Miller, C.M.; Fearey, B.L.

1991-01-01T23:59:59.000Z

394

DEVELOPMENT OF A HIGH EFFICIENCY MECHANICALLY STACKED MULTI-JUNCTION SOLAR CELL  

E-Print Network [OSTI]

Monolithic, 2-terminal, epitaxially grown multi-junctions represent the state-of-the-art in high efficiency photovoltaic space power. Their in-situ monolithic integration results in an elegant device structure with high efficiency, relatively high specific power, and a simple fabrication process. The monolithic, epitaxially grown nature of these devices also imposes materials and design restrictions which impede the march to significantly higher

Daniel Aiken; Paul Sharps; Mark Stan; Harry Atwater; Anna Fontcuberta I Morral; James Zahler; Mark Wanlass

395

Efficient model-based leak detection in boiler steam-water systems Xi Sun, Tongwen Chen *, Horacio J. Marquez  

E-Print Network [OSTI]

Efficient model-based leak detection in boiler steam-water systems Xi Sun, Tongwen Chen *, Horacio detection in boiler steam-water systems. The algorithm has been tested using real industrial data from Syncrude Canada, and has proven to be effective in detection of boiler tube or steam leaks; proper

Marquez, Horacio J.

396

High-resolution terahertz atmospheric water vapor continuum measurements  

E-Print Network [OSTI]

High-resolution terahertz atmospheric water vapor continuum measurements David M. Slocum,* Thomas M such as pollution monitoring and the detection of energetic chemicals using remote sensing over long path lengths through the atmosphere. Although there has been much attention to atmospheric effects over narrow

Massachusetts at Lowell, University of

397

High-Power Batteries | Center for Energy Efficient Materials  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-SeriesFlickr FlickrGuidedCH2M HILLAdministrationHighHigh

398

Research on stable, high-efficiency, amorphous silicon multijunction modules  

SciTech Connect (OSTI)

The present effort seeks to develop modules with a stabilized performance of 8.8% aperture area conversion after 600 hours light exposure (AM1.5) at 50{degrees}C in modules with aperture areas over 900 cm{sup 2}. Good progress towards this goal has been obtained with the demonstration of 9.8% initial performance in a submodule incorporating devices with relatively thin middle junction i-layer thickness of 4000{Angstrom}. Devices with this design have been shown to lose about 10% of their initial performance after 1000 hours of exposure. Modules lose between 18--23% largely due to light induced shunting, probably related to the contact metallization. Achieving long-term stabilized efficiencies of 12% or more requires substantial improvements in materials and devices. Our analysis has shown that substantial optical losses occur at both front and rear contacts which we hope to address with ZnO films prepared by CVD and sputtering processes now under development. Further progress is doped layers and alloys are also needed. Fundamental studies of the relationship between material structure and processes (particularly the effect of hydrogen dilution) are reported here. 32 refs., 28 figs., 9 tabs.

Catalano, A.; Bennet, M.; Chen, L.; Fieselmann, B.; Li, Y.; Newton, J.; Podlesny, R.; Wiedeman, S.; Yang, L. (Solarex Corp., Newtown, PA (United States). Thin Film Div.)

1991-08-01T23:59:59.000Z

399

Energy Efficiency Design Options for Residential Water Heaters: Economic Impacts on Consumers  

E-Print Network [OSTI]

Document (TSD): Energy Efficiency Standards for Consumerthe Assistant Secretary for Energy Efficiency and RenewableSummer Study on Energy Efficiency in Buildings. Asilomar,

Lekov, Alex

2011-01-01T23:59:59.000Z

400

High-Efficiency Clean Combustion Design for Compression Ignition Engines |  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional Subject:Ground Hawaii HIGH PERFORMANCEDOEDepartment of Energy

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


401

High-Efficiency Commercial Cold Climate Heat Pump  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional Subject:Ground Hawaii HIGH PERFORMANCEDOEDepartment ofEngines

402

High-Efficiency Engine Technologies Session Introduction | Department of  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional Subject:Ground Hawaii HIGH PERFORMANCEDOEDepartment

403

Industrial DSM: Beyond High Efficiency Lights and Motors  

E-Print Network [OSTI]

on behalf of electric utilities. These represent real-world solutions to problems in actual industrial plants in many different types of industries. DSM IN LOW TEMPERATURE REFRIGERAnON SYST M APPLICAnONS Industrial refrigeration equipment is highly... energy-intensive. In many dairy procl::."ing plants in particular, refrigeration systems are the largest electricity consumers, repre enting as much as 75 percent of plant peak demand. The availability of the refrigeration system is critical...

Appelbaum, B.

404

Power efficiency for very high temperature solar thermal cavity receivers  

DOE Patents [OSTI]

This invention is an improved solar energy cavity receiver for exposing materials and components to high temperatures. The receiver includes a housing having an internal reflective surface defining a cavity and having an inlet for admitting solar radiation thereto. A photothermal absorber is positioned in the cavity to receive radiation from the inlet. A reflective baffle is positioned between the absorber and the inlet to severely restrict the re-radiation of energy through the inlet. The front surface of the baffle defines a narrow annulus with the internal reflective surface of the housing. The front surface of the baffle is contoured to reflect incoming radiation onto the internal surface of the housing, from which it is reflected through the annulus and onto the front surface of the absorber. The back surface of the baffle intercepts infrared radiation from the front of the absorber. With this arrangement, a high percentage of the solar power input is retained in the cavity; thus, high internal temperatures are attained.

McDougal, Allan R. (LaCanada-Flintridge, CA); Hale, Robert R. (Upland, CA)

1984-01-01T23:59:59.000Z

405

Review of International Methods of Test to Rate the Efficiency of Water Heaters  

E-Print Network [OSTI]

energy multiplier Distribution losses Smart controls Wasted water Solar Heat pump water heater Australia/

Lutz, Jim

2012-01-01T23:59:59.000Z

406

INITIAL TEST BED FOR VERY HIGH EFFICIENCY SOLAR CELLS Allen Barnett  

E-Print Network [OSTI]

multiple benefits, including increased theoretical efficiency, new architectures that circumvent material/cost choices. An integrated optical/solar cell allows efficiency improvements while retaining low area costs, multiple-junction III-Vs for the high and low energy photons while circumventing existing cost drivers

Honsberg, Christiana

407

Highly efficient carbon dioxide capture with a porous organic polymer impregnated with  

E-Print Network [OSTI]

Highly efficient carbon dioxide capture with a porous organic polymer impregnated environmental crises such as global warming and ocean acidication, efficient carbon dioxide (CO2) capture As CO2 capture mate- rials, numerous solid adsorbents such as silica5 and carbon materials,6 metal

Paik Suh, Myunghyun

408

Design of Heterostructures for High Efficiency Thermionic Emission Zhixi Bian and Ali Shakouri  

E-Print Network [OSTI]

-state thermionic energy converters are expected to offer a larger thermoelectric power factor ( 2 S ) than uniformDesign of Heterostructures for High Efficiency Thermionic Emission Zhixi Bian and Ali Shakouri heterostructure designs to improve the energy conversion efficiency of solid- state thermionic devices. The first

409

Evaluation of SiC MOSFETs for a High Efficiency Three-Phase Buck Rectifier  

E-Print Network [OSTI]

-voltage DC (HVDC) distribution architecture in telecom and data centers was shown to have superior efficiency and reliability compared with the traditional AC architecture [1-2]. HVDC bus is usually set as 380 Vdc or 400 Vdc a high efficiency buck rectifier used in the first stage of HVDC architecture data center power supplies

Tolbert, Leon M.

410

innovati nNREL Produces Highly Efficient, Wide-Bandgap, Thin-Film Solar Cells  

E-Print Network [OSTI]

. Low-bandgap cells can lose 25% of their power output and efficiency ratings as solar cell operating energy output than a low-bandgap cell with the same wattage or power rating. NREL is a nationalinnovati nNREL Produces Highly Efficient, Wide-Bandgap, Thin-Film Solar Cells Researchers

411

High-Efficiency Energy Conversion in a Molecular Triad Connected to Conducting Leads Anatoly Yu. Smirnov,*,,  

E-Print Network [OSTI]

for Theoretical Physics, The UniVersity of Michigan, Ann Arbor, Michigan 48109-1040, and Department of Physics is highly attractive for solar cell applications. The large predicted increase in the efficiency, the efficient conversion of solar energy into chemical or electrical forms has attracted considerable attention

Nori, Franco

412

Desalination of seawater using a high-efficiency jet ejector  

E-Print Network [OSTI]

the nozzle and rushes through th e suction head. STAGE 3: A low absolute pressu re at 2 (inside suction head) entrains all of the adjacent gases in the vacuum vessel, acce lerates them to a high velocity and sw eeps them into the diffuser. The Diffuser... in temperature is essential for the evaporation process in this effect [44]. Capacities and possible pressu re ratios of the available vapor compressors play major roles in the limitations imposed on MVC systems; hence, a small number of effects wi th small...

Vishwanathappa, Manohar D.

2005-08-29T23:59:59.000Z

413

High-Efficiency Clean Combustion Engine Designs for Compression Ignition  

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarly Career Scientists'Montana.ProgramJulietip sheetK-4In 2013 many| Department HIGH PERFORMANCETheEngines |

414

High-Efficiency Window Air Conditioners - Building America Top Innovation |  

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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarly Career Scientists'Montana.ProgramJulietip sheetK-4In 2013 many| Department HIGH

415

Path to High Efficiency Gasoline Engine | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion | Department ofT ib l L d F SSalesOE0000652Grow Your EnergyTechnology to Market »Path to High

416

High Efficiency Multiple-Junction Solar Cells - Energy Innovation Portal  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFun withconfinement plasmas in the Madison SymmetricHigh Carbon Fly Ashand|Solar

417

Highly Efficient Multigap Solar Cell Materials - Energy Innovation Portal  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFun withconfinement plasmas in theinPlastics -␤,of Energy2-ButanolHighly

418

OPERATING EXPERIENCE LEVEL 3, Requalification Test Failure of Certain High Efficiency Particulate Air (HEPA) Filters- Update  

Broader source: Energy.gov [DOE]

2014-01 Operating Experience Level 3 (OE-3) document provides information regarding the previous requalification test failure and subsequent successful requalification, of certain high efficiency particulate air (HEPA) filter models manufactured by Flanders Corporation.

419

Approaches to fabricating high-efficiency ultra-thin CdTe solar cells.  

E-Print Network [OSTI]

??This thesis is an investigation of the fabrication, characterization and performance of high-efficiency and ultra-thin CdTe solar cells with an aim of reducing the material… (more)

Xia, Wei (1981 - )

2013-01-01T23:59:59.000Z

420

Conversion Tower for Dispatchable Solar Power: High-Efficiency Solar-Electric Conversion Power Tower  

SciTech Connect (OSTI)

HEATS Project: Abengoa Solar is developing a high-efficiency solar-electric conversion tower to enable low-cost, fully dispatchable solar energy generation. Abengoa’s conversion tower utilizes new system architecture and a two-phase thermal energy storage media with an efficient supercritical carbon dioxide (CO2) power cycle. The company is using a high-temperature heat-transfer fluid with a phase change in between its hot and cold operating temperature. The fluid serves as a heat storage material and is cheaper and more efficient than conventional heat-storage materials, like molten salt. It also allows the use of a high heat flux solar receiver, advanced high thermal energy density storage, and more efficient power cycles.

None

2012-01-11T23:59:59.000Z

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


421

High Efficiency CdTe Ink-Based Solar Cells Using Nanocrystals (Fact Sheet)  

SciTech Connect (OSTI)

This NREL Highlight is being developed for the 2015 February Alliance S&T Board meeting and describes a solution-processable ink to produce high-efficiency solar cells using low temperature and simple processing.

Not Available

2015-01-01T23:59:59.000Z

422

Highly Energy and Performance Efficient Embedded Computing through Approximately Correct Arithmetic  

E-Print Network [OSTI]

) a mathematically rigorous foundation characterizing a trade- off between energy consumed and the quality. (ii) Techniques which trade off energy for quality of solution. These are typi- callyHighly Energy and Performance Efficient Embedded Computing through Approximately Correct Arithmetic

423

Highly Efficient Amplification of Chronic Wasting Disease Agent by Protein Misfolding Cyclic Amplification with  

E-Print Network [OSTI]

Amplification with Beads (PMCAb) Chad J. Johnson1 , Judd M. Aiken2 , Debbie McKenzie2 , Michael D. Samuel3. Citation: Johnson CJ, Aiken JM, McKenzie D, Samuel MD, Pedersen JA (2012) Highly Efficient Amplification

424

Ultra Clean 1.1 MW High Efficiency Natural Gas Engine Powered...  

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

Ultra Clean 1.1 MW High Efficiency Natural Gas Engine Powered CHP System Contract: DE-EE0004016 GE Energy, Dresser Inc. 102010 - 92014 Jim Zurlo, Principal Investigator...

425

High-Efficiency 6?? Multicrystalline Black Solar Cells Based on Metal-Nanoparticle-Assisted Chemical Etching  

E-Print Network [OSTI]

Multicrystalline silicon (mc-Si) photovoltaic (PV) solar cells with nanoscale surface texturing by metal-nanoparticle-assisted etching are proposed to achieve high power efficiency. The investigation of average nanorod ...

Hsu, W. Chuck

2012-01-01T23:59:59.000Z

426

A new power combining and outphasing modulation system for high-efficiency power amplification  

E-Print Network [OSTI]

This paper describes a new power combining and outphasing system that provides both high efficiency and linear output control. Whereas conventional outphasing systems utilize two power amplifiers, the system introduced ...

Perreault, David J.

427

A New Power Combining and Outphasing Modulation System for High-Efficiency Power Amplification  

E-Print Network [OSTI]

This paper describes a new power combining and outphasing system that provides both high efficiency and linear output control. Whereas conventional outphasing systems utilize two power amplifiers, the system introduced ...

Perreault, David J.

428

Fuels and Combustion Strategies for High-Efficiency Clean-Combustion...  

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

Mixing-Controlled Combustion Strategies for High-Efficiency Clean-Combustion Engines Optical-Engine and Surrogate-Fuels Research for an Improved Understanding of Fuel Effects on...

429

Graphene-Multilayer Graphene Nanocomposites as Highly Efficient Thermal Interface Materials  

E-Print Network [OSTI]

resistance at the graphene-matrix interface. KEYWORDS: Graphene, thermal interface materials, nanocompositesGraphene-Multilayer Graphene Nanocomposites as Highly Efficient Thermal Interface Materials Khan M suggest that graphene-multilayer graphene nanocomposite used as the thermal interface material outperforms

430

High Efficiency Clean Combustion in Multi-Cylinder Light-Duty...  

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

Light-Duty Multi-Cylinder Engine High Efficiency Clean Combustion in Multi-Cylinder Light-Duty Engines Vehicle Technologies Office Merit Review 2014: Impacts of Advanced Combustion...

431

Architectural Support for High-Performance, Power-Efficient and Secure Multiprocessor Systems  

E-Print Network [OSTI]

domains. Also, power efficiency in high performance computing has been one of the major issues to be resolved. The power density of core components becomes significantly higher, and the fraction of power supply in total management cost is dominant...

An, Baik Song

2012-10-19T23:59:59.000Z

432

High efficiency resonant dc/dc converter for solar power applications  

E-Print Network [OSTI]

This thesis presents a new topology for a high efficiency dc/dc resonant power converter that utilizes a resistance compression network to provide simultaneous zero voltage switching and near zero current switching across ...

Inam, Wardah

2013-01-01T23:59:59.000Z

433

Testing and Economic Evaluation of a High Efficiency 10-ton Rooftop Air Conditioner  

E-Print Network [OSTI]

In 1993, the U.S. Environmental Protection Agency initiated a project to design, build and demonstrate a high efficiency commercial rooftop air conditioning unit. The unit was designed by Hibberd Consulting of Westminster, Colorado, and was built...

O'Neal, D. L.; Davis, M. A.

2006-11-09T23:59:59.000Z

434

Nanocoatings for High-Efficiency Industrial and Tooling Systems  

SciTech Connect (OSTI)

This industry-driven project was the result of a successful response by Eaton Corporation to a DOE/ITP Program industry call. It consisted of three phases in which ORNL participated. In addition to Eaton Corporation and ORNL (CRADA), the project team included Ames Laboratory, who developed the underlying concept for aluminum-magnesium-boron based nanocomposite coatings [1], and Greenleaf, a small tooling manufacturer in western Pennsylvania. This report focuses on the portion of this work that was conducted by ORNL in a CRADA with Eaton Corporation. A comprehensive final report for the entire effort, which ended in September 2010, has been prepared by Eaton Corporation. Phase I, “Proof of Concept” ran for one year (September 1, 2006 to September 30, 2007) during which the applicability of AlMgB14 single-phase and nanocomposite coatings on hydraulic material coupons and components as well as on tool inserts was demonstrated.. The coating processes used either plasma laser deposition (PLD) or physical vapor deposition (PVD). During Phase I, ORNL conducted laboratory-scale pin-on-disk and reciprocating pin-on-flat tests of coatings produced by PLD and PVD. Non-coated M2 tool steel was used as a baseline for comparison, and the material for the sliding counterface was Type 52100 bearing steel since it simulated the pump materials. Initial tests were run mainly in a commercial hydraulic fluid named Mobil DTE-24, but some tests were later run in a water-glycol mixture as well. A tribosystem analysis was conducted to define the operating conditions of pump components and to help develop simulative tests in Phase II. Phase II, “Coating Process Scale-up” was intended to use scaled-up process to generate prototype parts. This involved both PLD practices at Ames Lab, and a PVD scale-up study at Eaton using its production capable equipment. There was also a limited scale-up study at Greenleaf for the tooling application. ORNL continued to conduct friction and wear tests on process variants and developed tests to better simulate the applications of interest. ORNL also employed existing lubrication models to better understand hydraulic pump frictional behavior and test results. Phase III, “Functional Testing” focused on finalizing the strategy for commercialization of AlMgB14 coatings for both hydraulic and tooling systems. ORNL continued to provide tribology testing and analysis support for hydraulic pump applications. It included both laboratory-scale coupon testing and the analysis of friction and wear data from full component-level tests performed at Eaton Corp. Laboratory-scale tribology test methods are used to characterize the behavior of nanocomposite coatings prior to running them in full-sized hydraulic pumps. This task also includes developing tribosystems analyses, both to provide a better understanding of the performance of coated surfaces in alternate hydraulic fluids, and to help design useful laboratory protocols. Analysis also includes modeling the lubrication conditions and identifying the physical processes by which wear and friction of the contact interface changes over time. This final report summarizes ORNL’s portion of the nanocomposite coatings development effort and presents both generated data and the analyses that were used in the course of this effort.

Blau, P; Qu, J.; Higdon, C. (Eaton Corporation)

2011-02-01T23:59:59.000Z

435

Recent advances in III-V on Si integration for high-efficiency,  

E-Print Network [OSTI]

Recent advances in III-V on Si integration for high-efficiency, low cost MJ cells Minjoo Larry Lee for concentrator photovoltaics · Metamorphic mid-infrared (2-3 µm) materials and devices(w/ D.Wasserman, UIUC · Conclusions 4 300 mm Si Low-cost, high- efficiency MJ cells on 300 mm Si 50 mm GaP 150 mm GaAs #12;Challenge

Firestone, Jeremy

436

An International Survey of Electric Storage Tank Water Heater Efficiency and Standards  

E-Print Network [OSTI]

blankets to electric hot water heaters in South Africa,” J.for Residential Water Heaters, Direct Heating Equipment, andfor Residential Water Heaters, Direct Heating Equipment, and

Johnson, Alissa

2013-01-01T23:59:59.000Z

437

An International Survey of Electric Storage Tank Water Heater Efficiency and Standards  

E-Print Network [OSTI]

Fixed Electric Storage Water Heaters, South African Nationalinternational electric storage water heater test proceduresefficiency of electric storage water heaters, and outlines

Johnson, Alissa

2013-01-01T23:59:59.000Z

438

Energy Efficiency Design Options for Residential Water Heaters: Economic Impacts on Consumers  

E-Print Network [OSTI]

for gas and electric storage water heaters. It presents theboth gas and electric storage water heaters, and heat pumpliters) for gas storage water heaters and a maximum input

Lekov, Alex

2011-01-01T23:59:59.000Z

439

Operating Water Cherenkov Detectors in high altitude sites for the Large Aperture GRB Observatory  

E-Print Network [OSTI]

Water Cherenkov Detectors (WCD) are efficient detectors for detecting GRBs in the 10 GeV - 1 TeV energy range using the single particle technique, given their sensitivity to low energy secondary photons produced by high energy photons when cascading in the atmosphere. The Large Aperture GRB Observatory (LAGO) operates arrays of WCD in high altitude sites (above 4500 m a.s.l.) in Bolivia, Mexico and Venezuela, with planned extension to Peru. Details on the operation and stability of these WCD in remote sites with high background rates of particles will be detailed, and compared to simulations. Specific issues due to operation at high altitude, atmospheric effects and solar activity, as well as possible hardware enhancements will also be presented.

Allard, D; Asorey, H; Barros, H; Bertou, X; Castillo, M; Chirinos, J M; De Castro, A; Flores, S; González, J; Berisso, M Gomez; Grajales, J; Guada, C; Day, W R Guevara; Ishitsuka, J; López, J A; Martínez, O; Melfo, A; Meza, E; Loza, P Miranda; Barbosa, E Moreno; Murrugarra, C; Núñez, L A; Ormachea, L J Otiniano; Pérez, G; Perez, Y; Ponce, E; Quispe, J; Quintero, C; Rivera, H; Rosales, M; Rovero, A C; Saavedra, O; Salazar, H; Tello, J C; Peralda, R Ticona; Varela, E; Velarde, A; Villaseñor, L; Wahl, D; Zamalloa, M A

2009-01-01T23:59:59.000Z

440

Design of a high temperature hot water central heating system  

SciTech Connect (OSTI)

The paper reviews the conceptual design of a central heating system at Los Alamos Scientific Laboratory. The resource considered for this heating system design was hot dry rock geothermal energy. Design criteria were developed to ensure reliability of energy supply, to provide flexibility for adaptation to multiple energy resources, to make optimum use of existing equipment and to minimize reinvestment cost. A variable temperature peaking high temperature water system was selected for this purpose.

Beaumont, E.L.; Johnson, R.C.; Weaver, J.M.

1981-11-01T23:59:59.000Z

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


441

Design manual for high temperature hot water and steam systems  

SciTech Connect (OSTI)

The author presents aspects of high temperature hot water and steam generating systems. It covers all the calculations that must be made for sizing and then selecting the equipment that will make up an energy system. The author provides essential information on loan analysis, types of fuel, storage requirements, handling facilities, waste disposal, HVAC needs, and back-up systems. Also included are the calculations needed for determining the size of compressors, air pollution devices, fans, filters, and other supplementary equipment.

Cofield, R.E. Jr.

1984-01-01T23:59:59.000Z

442

ULTRA HIGH EFFICIENCY ESP DEVELOPMENT FOR AIR TOXICS CONTROL  

SciTech Connect (OSTI)

Because more than 90 percent of U.S. coal-fired utility boilers are equipped with electrostatic precipitators (ESPs), retrofitable ESP technologies represent a logical approach towards achieving the Department of Energy's (DOE) goal of a major reduction in fine particulate and mercury emissions (air toxics) from coal based power systems. EPA's recent issuance of significantly tightened ambient air standards for particles smaller than 2.5 {micro}m (PM{sub 2.5}) creates a new urgency for developing cost-effective means to control fine particulate emissions. This challenge is compounded by the on-going switch in the utility industry to low-sulfur Powder River Basin (PRB) coals, that generate higher resistivity and difficult-to-collect fly ash. Particulate emissions can increase by a factor of ten when a utility switches to a low-sulfur coal. Numerous power plants are presently limited in operation by the inability of their ESPs to control opacity at high loads. In Phase I of this program, ABB investigated five technologies to improve the collection of fine particulate and trace metals in ESPs. These included: (1) flue-gas cooling, (2) flue-gas humidification, (3) pulsed energization, (4) wet ESP and precharger modules, and (5) sorbent injection for mercury control. Tests were conducted with an Eastern bituminous coal and a Powder River Basin sub-bituminous low-sulfur coal in an integrated pilot-scale combustor and ESP test facility. The impacts of the different retrofit technologies on ESP performance, individually and in combination, were evaluated indepth through advanced sampling and measurement techniques. In Phase II, the most promising concepts identified from Phase I testing, flue-gas cooling and humidification, pulsed energization, and sorbent injection at low flue-gas temperatures for mercury control, were integrated into a commercially oriented sub-scale system for field testing at Commonwealth Edison's Waukegan Unit No. 8. The main objective of the proposed Phase II testing was to determine longer term ESP performance and mercury capture improvements with the above enhancements for a range of low-sulfur coals currently fired by utilities. Unanticipated cost growth in readying the Pilot Plant for shipment and during slipstream construction at the utility host site resulted in the issuance of a preemptive stop work order from ABB until a detailed technical and budgetary review of the project could be completed. Four program recovery scenarios were developed and presented to the DOE. After careful review of these options, it was decided to terminate the program and although the Pilot Plant installation was essentially completed, no testing was performed. The Pilot Plant was subsequently decommissioned and the host site returned to its preprogram condition.

David K. Anderson

1999-11-01T23:59:59.000Z

443

High resolution neutron imaging of water in PEM fuel cells  

SciTech Connect (OSTI)

Optimal water management in Polymer Electrolyte Membrane (PEM) fuel cells is critical to improving the performance and durability of fuel cell systems especially during transient, start-up and shut-down operations. For example, while a high water content is desirable for improved membrane and catalyst ionomer conductivity, high water content can also block gas access to the triple-phase boundary resulting in lowered performance due to catalyst and gas diffusion layer (GDL) flooding. Visualizing liquid water by neutron imaging has been used over the past decade to study the water distribution inside operating fuel cells. In this paper, the results from our imaging at NIST using their recently installed higher resolution ({approx} 25 mm) Microchannel Plate (MCP) detector with a pixel pitch of 14.7 mm are presented. This detector is capable of quantitatively imaging the water inside the MEA (Membrane Electrode Assembly)/GDL (Gas Diffusion Layer) of working fuel cells and can provide the water profiles within these various components in addition to the channel water. Specially designed fuel cells (active area = 2.25 cm{sup 2}) have been used in order to take advantage of the full detector resolution. The cell design is illustrated in a figure where one of the current collector/end plates is shown. The serpentine pattern was machined into a block of aluminum and plated with nickel and then gold to form the flow field. The measurements were performed using beam no. 1 and aperture no. 2 with a fluence rate of 1.9 x 10{sup 6} neutrons cm{sup -2} sec{sup -1}. The cells were assembled with Gore{sup TM} Primea{sup R} MEAs and SGL Sigracet {sup R} 24 series GDLs (PRIMEA, GORE-SELECT and GORE are trademarks of W. L. Gore & Associates, Inc). All the cells were tested at 80 {sup o}C with 1.2 stoichiometry H{sub 2} and 2.0 stoichiometry air flows.

Mukundan, Rangachary [Los Alamos National Laboratory; Borup, Rodney L [Los Alamos National Laboratory; Davey, John R [Los Alamos National Laboratory; Spendelow, Jacob S [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

444

Microelectronics Plant Water Efficiency Improvements at Sandia National Laboratories: Best Management Practice, Case Study #13 - Other Water Use (Brochure)  

SciTech Connect (OSTI)

Overview of alternative financing mechanisms avaiable to Federal agencies to fund renewable energy and energy efficiency projects.

Not Available

2009-08-01T23:59:59.000Z

445

The energy-water tug of war: Drought exacerbates the paradox of efficiently producing energy while conserving water  

E-Print Network [OSTI]

Drought exacerbates the paradox of e#30;ciently producing energy while conserving water Fall 2011 tx H2O 21 ] Timeline of Droughts in Texas 1985 1986 1987 1988 1989 Conservation of water, which is recognized as being more...20 tx H2O Fall 2011 Story by Danielle Kalisek and Leslie Lee 1980 1981 1982 1983 1984 The Sabine River Authority and the city of Dallas sign a contract to move water to the Dallas Water Utilities Eastside Water...

Kalisek, Danielle

2011-01-01T23:59:59.000Z

446

Energy Efficiency Design Options for Residential Water Heaters: Economic Impacts on Consumers  

E-Print Network [OSTI]

of a Drop-In Heat Pump Water Heater, Oak Ridge National Lab.CA. Maxwell, J. 2004. Heat Pump Water Heater Economic Model.water heaters. For heat pump water heaters, the study also

Lekov, Alex

2011-01-01T23:59:59.000Z

447

Best Practices for Energy Efficient Cleanrooms: Variable Speed Pumping  

E-Print Network [OSTI]

efficiency of chilled water and condenser pumps, along with chiller efficiency and cooling tower efficiency, operate, and control water-pumping systems to achieve high efficiency and to lower life-cycle costsLBNL-58637 Best Practices for Energy Efficient Cleanrooms: Variable Speed Pumping Tengfang Xu June

448

High Efficiency, Low Cost Solar Cells Manufactured Using 'Silicon Ink' on Thin Crystalline Silicon Wafers  

SciTech Connect (OSTI)

Reported are the development and demonstration of a 17% efficient 25mm x 25mm crystalline Silicon solar cell and a 16% efficient 125mm x 125mm crystalline Silicon solar cell, both produced by Ink-jet printing Silicon Ink on a thin crystalline Silicon wafer. To achieve these objectives, processing approaches were developed to print the Silicon Ink in a predetermined pattern to form a high efficiency selective emitter, remove the solvents in the Silicon Ink and fuse the deposited particle Silicon films. Additionally, standard solar cell manufacturing equipment with slightly modified processes were used to complete the fabrication of the Silicon Ink high efficiency solar cells. Also reported are the development and demonstration of a 18.5% efficient 125mm x 125mm monocrystalline Silicon cell, and a 17% efficient 125mm x 125mm multicrystalline Silicon cell, by utilizing high throughput Ink-jet and screen printing technologies. To achieve these objectives, Innovalight developed new high throughput processing tools to print and fuse both p and n type particle Silicon Inks in a predetermined pat-tern applied either on the front or the back of the cell. Additionally, a customized Ink-jet and screen printing systems, coupled with customized substrate handling solution, customized printing algorithms, and a customized ink drying process, in combination with a purchased turn-key line, were used to complete the high efficiency solar cells. This development work delivered a process capable of high volume producing 18.5% efficient crystalline Silicon solar cells and enabled the Innovalight to commercialize its technology by the summer of 2010.

Antoniadis, H.

2011-03-01T23:59:59.000Z

449

Reliable, Economic, Efficient CO2 Heat Pump Water Heater for North America  

SciTech Connect (OSTI)

Adoption of heat pump water heating technology for commercial hot water could save up to 0.4 quads of energy and 5 million metric tons of CO2 production annually in North America, but industry perception is that this technology does not offer adequate performance or reliability and comes at too high of a cost. Development and demonstration of a CO2 heat pump water heater is proposed to reduce these barriers to adoption. Three major themes are addressed: market analysis to understand barriers to adoption, use of advanced reliability models to design optimum qualification test plans, and field testing of two phases of water heater prototypes. Market experts claim that beyond good performance, market adoption requires 'drop and forget' system reliability and a six month payback of first costs. Performance, reliability and cost targets are determined and reliability models are developed to evaluate the minimum testing required to meet reliability targets. Three phase 1 prototypes are designed and installed in the field. Based on results from these trials a product specification is developed and a second phase of five field trial units are built and installed. These eight units accumulate 11 unit-years of service including 15,650 hours and 25,242 cycles of compressor operation. Performance targets can be met. An availability of 60% is achieved and the capability to achieve >90% is demonstrated, but overall reliability is below target, with an average of 3.6 failures/unit-year on the phase 2 demonstration. Most reliability issues are shown to be common to new HVAC products, giving high confidence in mature product reliability, but the need for further work to minimize leaks and ensure reliability of the electronic expansion valve is clear. First cost is projected to be above target, leading to an expectation of 8-24 month payback when substituted for an electric water heater. Despite not meeting all targets, arguments are made that an industry leader could sufficiently develop this technology to impact the water heater market in the near term.

Radcliff, Thomas D; Sienel, Tobias; Huff, Hans-Joachim; Thompson, Adrian; Sadegh, Payman; Olsommer, Benoit; Park, Young

2006-12-31T23:59:59.000Z

450

Development of a solar receiver for a high-efficiency thermionic/thermoelectric conversion system  

SciTech Connect (OSTI)

Solar energy is one of the most promising energy resources on Earth and in space, because it is clean and inexhaustible. Therefore, we have been developing a solar-powered high-efficiency thermionic-thermoelectric conversion system which combines a thermionic converter (TIC) with a thermoelectric converter (TEC) to use thermal energy efficiently and to achieve high efficiency conversion. The TIC emitter must uniformly heat up to 1800 K. The TIC emitter can be heated using thermal radiation from a solar receiver maintained at a high temperature by concentrated solar irradiation. A cylindrical cavity-type solar receiver constructed from graphite was designed and heated in a vacuum by using the solar concentrator at Tohoku University. The maximum temperature of the solar receiver enclosed by a molybdenum cup reached 1965 K, which was sufficiently high to heat a TIC emitter using thermal radiation from the receiver. 4 refs., 6 figs., 1 tab.

Naito, H.; Kohsaka, Y.; Cooke, D.; Arashi, H. [Tohoku Univ., Aramaki (Japan)] [Tohoku Univ., Aramaki (Japan)

1996-10-01T23:59:59.000Z

451

FastRoute: An efficient and high-quality global , Yanheng Zhang3  

E-Print Network [OSTI]

measured at the edges of global routing grids but also minimize the total wirelength and via usage, which1 FastRoute: An efficient and high-quality global router Min Pan1 , Yue Xu2 , Yanheng Zhang3--Modern large-scale circuit designs have created great demand for fast and high-quality global routing

Chu, Chris C.-N.

452

Water Heating: Energy-efficient strategies for supplying hot water in the home (BTS Technology Fact Sheet)  

SciTech Connect (OSTI)

Fact sheet for homeowners and contractors on how to supply hot water in the home while saving energy.

NAHB Research Center; Southface Energy Institute; U.S. Department of Energy's Oak Ridge Laboratory; U.S. Department of Energy's National Renewable Energy Laboratory

2001-08-15T23:59:59.000Z

453

Materials-Enabled High-Efficiency (MEHE) Heavy-Duty Diesel Engines  

SciTech Connect (OSTI)

The purpose of this Cooperative Research and Development Agreement (CRADA) between UTBattelle, Inc. and Caterpillar, Inc. was to improve diesel engine efficiency by incorporating advanced materials to enable higher combustion pressures and temperatures necessary for improved combustion. The project scope also included novel materials for use in advanced components and designs associated with waste-heat recovery and other concepts for improved thermal efficiency. Caterpillar initially provided ORNL with a 2004 Tier 2 C15 ACERT diesel engine (designed for on-highway use) and two 600 hp motoring dynamometers. The first year of the CRADA effort was focused on establishing a heavy-duty experimental engine research cell. First year activities included procuring, installing and commissioning the cell infrastructure. Infrastructure components consisted of intake air handling system, water tower, exhaust handling system, and cell air conditioning. Other necessary infrastructure items included the fuel delivery system and bottled gas handling to support the analytical instrumentation. The second year of the CRADA focused on commissioning the dynamometer system to enable engine experimentation. In addition to the requirements associated with the dynamometer controller, the electrical system needed a power factor correction system to maintain continuity with the electrical grid. During the second year the engine was instrumented and baseline operated to confirm performance and commission the dynamometer. The engine performance was mapped and modeled according to requirements provided by Caterpillar. This activity was further supported by a Work-for-Others project from Caterpillar to evaluate a proprietary modeling system. A second Work-for-Others activity was performed to evaluate a novel turbocharger design. This project was highly successful and may lead to new turbocharger designs for Caterpillar heavy-duty diesel engines. During the third (and final) year of the CRADA, a novel valve material was evaluated to assess high temperature performance and durability. A series of prototype valves, composed of a unique nickel-alloy was placed in the engine head. The engine was aggressively operated using a transient test cycle for 200 hours. The valve recession was periodically measured to determine valve performance. Upon completion of the test the valves were removed and returned to Caterpillar for additional assessment. Industrial in-kind support was available throughout the project period. Review of the status and research results were carried out on a regular basis (meetings and telecons) which included direction for future work activities. A significant portion of the industrial support was in the form of information exchange and technical consultation.

Kass, M.; Veliz, M. (Caterpillar, Inc.) [Caterpillar, Inc.

2011-09-30T23:59:59.000Z

454

REMOTE ANALYSIS OF HIGH-TRITIUM-CONTENT WATER  

SciTech Connect (OSTI)

Systems to safely analyze for tritium in moisture collected from glovebox atmospheres are being developed for use at Savannah River Site (SRS) tritium facilities. Analysis results will guide whether the material contains sufficient tritium for economical recovery, or whether it should be stabilized for disposal as waste. In order to minimize potential radiation exposures that could occur in handling and diluting high-tritium-content water, SRS sought alternatives to the process laboratory's routine analysis by liquid-scintillation counting. The newer systems determine tritium concentrations by measuring bremsstrahlung radiation induced by low-energy beta interactions. One of the systems determines tritium activity in liquid streams, the other determines tritium activity in water vapor. Topics discussed include counting results obtained by modeling and laboratory testing and corrections that are made for low-energy photon attenuation.

Diprete, D; Raymond Sigg, R; Leah Arrigo, L; Donald Pak, D

2007-08-07T23:59:59.000Z

455

High efficiency SHG of orbital angular momentum light in an external cavity  

E-Print Network [OSTI]

Traditional methods for generating orbital angular momentum (OAM) light include holographic diffraction gratings, vortex phase plate and spatial light modulator. In this article, we report a new method for high efficient OAM light generation. By pumping an external cavity contains a quasi phase matching nonlinear crystal with a fundamental OAM carrying light and properly aligning the cavity, mode matching between the pump light and the cavitys higher order Laguerre-Gaussian (LG) mode is achieved, conversion efficiency up to 10.3 percentage have been obtained. We have demonstrated that the cavity can stably operate at its higher order LG mode just as Gaussian mode for the first time. The SHG light possesses a doubled OAM value with respect to the pump light. The parameters that affect the beam quality and conversion efficiency are discussed in detail. Our work opens a brand new field in laser optics, and makes the first step toward high efficiency OAM light processing.

Zhi-Yuan Zhou; Yan Li; Dong-Sheng Ding; Yun-Kun Jiang; Wei Zhang; Shuai Shi; Bao-Sen Shi; Guang-Can Guo

2014-05-12T23:59:59.000Z

456

Highly-Efficient Thermoelectronic Conversion of Solar Energy and Heat into Electric Power  

E-Print Network [OSTI]

Electric power may, in principle, be generated in a highly efficient manner from heat created by focused solar irradiation, chemical combustion, or nuclear decay by means of thermionic energy conversion. As the conversion efficiency of the thermionic process tends to be degraded by electron space charges, the efficiencies of thermionic generators have amounted to only a fraction of those fundamentally possible. We show that this space-charge problem can be resolved by shaping the electric potential distribution of the converter such that the static electron space-charge clouds are transformed into an output current. Although the technical development of practical generators will require further substantial efforts, we conclude that a highly efficient transformation of heat to electric power may well be achieved.

Meir, S; Geballe, T H; Mannhart, J

2013-01-01T23:59:59.000Z

457

Removal of MTBE and other organic contaminants from water by sorption to high silica zeolites  

SciTech Connect (OSTI)

Select zeolites with high SiO{sub 2}/Al{sub 2}O{sub 3} ratios were shown to effectively remove methyl tert-butyl ether (MTBE), chloroform, and trichloroethylene (TCE) from water. In laboratory studies using batch sorption equilibria, high Si large-port mordenite and ZSM-5 (silicalite) were found to have sorption properties for MTBE and TCE superior to activated carbon. for example, at an equilibrium solution concentration of 100 {micro}g/L, high Si mordenite retained 8--12x more MTBE than either of two powdered activated carbons used as reference sorbents. Sorption results also highlight the importance of pore size and SiO{sub 2}/Al{sub 2}O{sub 3} ration on contaminant removal efficiencies by zeolites.

Anderson, M.A.

2000-02-15T23:59:59.000Z

458

Piedmont Natural Gas- Commercial Equipment Efficiency Program  

Broader source: Energy.gov [DOE]

Piedmont Natural Gas offers rebates to commercial customers for purchasing and installing high-efficiency natural gas tankless water heaters. Customers on the 202-Small General Service Standard...

459

NSTAR (Gas)- Commercial Energy Efficiency Programs  

Broader source: Energy.gov [DOE]

NSTAR Gas offers incentives for their commercial customers to save energy in existing facilities. Rebates are for high efficiency gas space heating equipment, water heating equipment, infrared...

460

Irrigation Water Management for the Texas High Plains: A Research Summary  

E-Print Network [OSTI]

0.30 inches per day (7.6 mm/day). Irrigations should be timed to avoid water stress during periods of peak water use--boot, heading and flowering stages--to achieve reasonably good yields and maximum irrigation water use efficiency. Two well...

Sweeten, John M.; Jordan, Wayne R.

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


461

High pressure water jet cutting of sugar cane  

E-Print Network [OSTI]

performance was uniform before cutting. A liquid filled bourdon tube gauge was used to deter- mine the prescribed operating pressures. The gauge measured the oil pressure of the intensifier which had a 20 to 1 ratio (Figure 4 ) ~ The gauge pressure...HIGH PRESSURE WATER JET CUTTING OF SUGAR CANE A Thesis by THOMAS DONALD VALCO Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE May 1977 Major Subject...

Valco, Thomas Donald

2012-06-07T23:59:59.000Z

462

Energy Efficiency Design Options for Residential Water Heaters: Economic Impacts on Consumers  

E-Print Network [OSTI]

of a Drop-In Heat Pump Water Heater, Oak Ridge National Lab.Clear Seas Research. 2006. Water Heater Study. Plumbing andJ. 2003. Incorporating Water Heater Replacement into the

Lekov, Alex

2011-01-01T23:59:59.000Z

463

Review of International Methods of Test to Rate the Efficiency of Water Heaters  

E-Print Network [OSTI]

associated with the EU water heater test procedure loadEU test procedure for water heaters. Load No. Delivered Max.period to allow the water heater to adjust completely to

Lutz, Jim

2012-01-01T23:59:59.000Z

464

How to Make Appliance Standards Work: Improving Energy and Water Efficiency Test Procedures  

E-Print Network [OSTI]

Volume III, Storage Water Heaters With Input Ratings AboveVolume III, Storage Water Heaters With Input Ratings AboveVolume III, Storage Water Heaters With Input Ratings Above

Lutz, Jim

2012-01-01T23:59:59.000Z

465

Review of International Methods of Test to Rate the Efficiency of Water Heaters  

E-Print Network [OSTI]

gas and electric storage water heaters, heat-pump watersmall gas-fired storage water heaters with a large burner.such as electric storage water heaters, the comparison of

Lutz, Jim

2012-01-01T23:59:59.000Z

466

Efficient, sustainable production of molecular hydrogen -a promising alternative to batteries in terms of energy storage -is still an unsolved problem. Implementation of direct water splitting  

E-Print Network [OSTI]

in terms of energy storage - is still an unsolved problem. Implementation of direct water splitting usingEfficient, sustainable production of molecular hydrogen - a promising alternative to batteries

KuÂ?el, Petr

467

USING LIGA BASED MICROFABRICATION TO IMPROVE OVERALL HEAT TRANSFER EFFICIENCY OF PRESSURIZED WATER REACTOR: I. Effects of Different Micro Pattern on Overall Heat Transfer.  

SciTech Connect (OSTI)

The Pressurized Water Reactors (PWRs in Figure 1) were originally developed for naval propulsion purposes, and then adapted to land-based applications. It has three parts: the reactor coolant system, the steam generator and the condenser. The Steam generator (a yellow area in Figure 1) is a shell and tube heat exchanger with high-pressure primary water passing through the tube side and lower pressure secondary feed water as well as steam passing through the shell side. Therefore, a key issue in increasing the efficiency of heat exchanger is to improve the design of steam generator, which is directly translated into economic benefits. The past research works show that the presence of a pin-fin array in a channel enhances the heat transfer significantly. Hence, using microfabrication techniques, such as LIGA, micro-molding or electroplating, some special microstructures can be fabricated around the tubes in the heat exchanger to increase the heat-exchanging efficiency and reduce the overall size of the heat-exchanger for the given heat transfer rates. In this paper, micro-pin fins of different densities made of SU-8 photoresist are fabricated and studied to evaluate overall heat transfer efficiency. The results show that there is an optimized micro pin-fin configuration that has the best overall heat transfer effects.

Zhang, M.; Ibekwe, S.; Li, G.; Pang, S.S.; and Lian, K.

2006-07-01T23:59:59.000Z

468

Refractory oxide hosts for a high power, broadly tunable laser with high quantum efficiency and method of making same  

DOE Patents [OSTI]

Refractory oxide crystals having high-quantum efficiency and high thermal stability for use as broadly tunable laser host materials. The crystals are formed by removing hydrogen from a single crystal of the oxide material to a level below about 10/sup 12/ protons per cm/sup 3/ and subsequently thermochemically reducing the oxygen content of the crystal to form sufficient oxygen anion vacancies so that short-lived F/sup +/ luminescence is produced when the crystal is optically excited.

Chen, Yok; Gonzalez, R.

1985-07-03T23:59:59.000Z

469

Refractory oxide hosts for a high power, broadly tunable laser with high quantum efficiency and method of making same  

DOE Patents [OSTI]

Refractory oxide crystals having high-quantum efficiency and high thermal stability for use as broadly tunable laser host materials. The crystals are formed by removing hydrogen from a single crystal of the oxide material to a level below about 10.sup.12 protons per cm.sup.3 and subsequently thermochemically reducing the oxygen content of the crystal to form sufficient oxygen anion vacancies so that short-lived F.sup.+ luminescence is produced when the crystal is optically excited.

Chen, Yok (Oak Ridge, TN); Gonzalez, Roberto (Madrid, ES)

1986-01-01T23:59:59.000Z

470

Fundamental understanding and development of low-cost, high-efficiency silicon solar cells  

SciTech Connect (OSTI)

The overall objectives of this program are (1) to develop rapid and low-cost processes for manufacturing that can improve yield, throughput, and performance of silicon photovoltaic devices, (2) to design and fabricate high-efficiency solar cells on promising low-cost materials, and (3) to improve the fundamental understanding of advanced photovoltaic devices. Several rapid and potentially low-cost technologies are described in this report that were developed and applied toward the fabrication of high-efficiency silicon solar cells.

ROHATGI,A.; NARASIMHA,S.; MOSCHER,J.; EBONG,A.; KAMRA,S.; KRYGOWSKI,T.; DOSHI,P.; RISTOW,A.; YELUNDUR,V.; RUBY,DOUGLAS S.

2000-05-01T23:59:59.000Z

471

Acceptance test procedure for High Pressure Water Jet System  

SciTech Connect (OSTI)

The overall objective of the acceptance test is to demonstrate a combined system. This includes associated tools and equipment necessary to perform cleaning in the 105 K East Basin (KE) for achieving optimum reduction in the level of contamination/dose rate on canisters prior to removal from the KE Basin and subsequent packaging for disposal. Acceptance tests shall include necessary hardware to achieve acceptance of the cleaning phase of canisters. This acceptance test procedure will define the acceptance testing criteria of the high pressure water jet cleaning fixture. The focus of this procedure will be to provide guidelines and instructions to control, evaluate and document the acceptance testing for cleaning effectiveness and method(s) of removing the contaminated surface layer from the canister presently identified in KE Basin. Additionally, the desired result of the acceptance test will be to deliver to K Basins a thoroughly tested and proven system for underwater decontamination and dose reduction. This report discusses the acceptance test procedure for the High Pressure Water Jet.

Crystal, J.B.

1995-05-30T23:59:59.000Z

472

New England Gas Company- Residential and Commercial Energy Efficiency Rebate Programs  

Broader source: Energy.gov [DOE]

In conjunction with Gas Networks, New England Gas Company offers its residential and commercial customers rebates for buying energy efficient gas boilers, furnaces, high efficiency water heaters,...

473

New Polymeric Proton Conductors for Water-free and High-temperature...  

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

New Polymeric Proton Conductors for Water-free and High-temperature Fuel Cells New Polymeric Proton Conductors for Water-free and High-temperature Fuel Cells Presentation on New...

474

Commercial Gas Water Heaters, Purchasing Specifications for Energy-Efficient Products (Fact Sheet)  

SciTech Connect (OSTI)

Performance and purchasing specifications for commercial gas water heaters under the FEMP-designated product program.

Not Available

2010-09-01T23:59:59.000Z

475

New Polymeric Proton Conductors for Water-free and High-temperature...  

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

for water-free and high temperature operation. - Measure conductivity, mechanicalthermal properties of Nafion and Polyether polyelectrolytes doped with imidazoles....

476

DEMONSTRATION OF 3D EFFECTS WITH HIGH GAIN AND EFFICIENCY IN A UV FEL OSCILLATOR  

SciTech Connect (OSTI)

We report on the performance of a high gain UV FEL oscillator operating on an energy recovery linac at Jefferson Lab. The high brightness of the electron beam leads to both gain and efficiency that cannot be reconciled with a one-dimensional model. Three-dimensional simulations do predict the performance with reasonable precision. Gain in excess of 100% per pass and an efficiency close to 1/2NW, where NW is the number of wiggler periods, is seen. The laser mirror tuning curves currently permit operation in the wavelength range of 438 to 362 nm. Another mirror set allows operation at longer wavelengths in the red with even higher gain and efficiency.

Stephen Benson; George Biallas; Keith Blackburn; James Boyce; Donald Bullard; James Coleman; Cody Dickover; David Douglas; Forrest Ellingsworth; Pavel Evtushenko; Carlos Hernandez-Garcia; Christopher Gould; Joseph Gubeli; David Hardy; Kevin Jordan; John Klopf; James Kortze; Robert Legg; Matthew Marchlik; Steven Moore; George Neil; Thomas Powers; Daniel Sexton; Michelle D. Shinn; Christopher Tennant; Richard Walker; Anne Watson; Gwyn Williams; Frederick Wilson; Shukui Zhang

2011-03-01T23:59:59.000Z

477

Research directions and progress in the SERI advanced high efficiency concept program  

SciTech Connect (OSTI)

The inherent electro-optical properties of gallium arsenide (GaAs) and related III-V compounds make this class of semiconductors an optimum choice for use in very high efficiency solar cells. The ability to alloy GaAs with other column III and V elements while maintaining the single crystal zincblende structure allows the photovoltaic properties to be tailored to specific needs. The current understanding and control of the properties of these materials is more advanced than for any other semiconductor except single crystal silicon. For these reasons, the Advanced High Efficiency Concepts Program supports materials research to improve the properties of III-V semiconductors needed to achieve the maximum attainable photovoltaic conversion efficiencies.

Cole, L.A.; Benner, J.P.

1984-06-01T23:59:59.000Z

478

Highly efficient star formation in NGC 5253 possibly from stream-fed accretion  

E-Print Network [OSTI]

A local dwarf galaxy, NGC 5253, has a young super star cluster that may provide an example of highly efficient star formation. Here we report the detection and imaging, with the Submillimeter Array, of the J= 3-2 rotational transition of CO at the location of the massive cluster associated with the supernebula. The gas cloud is hot, dense, quiescent, and extremely dusty. Its gas-to-dust ratio is lower than the Galactic value, which we attribute to dust enrichment by Wolf-Rayet stars within the embedded star cluster. Its star formation efficiency exceeds 50%, ten times higher than clouds in the Milky Way: this cloud is a factory of stars and soot. We suggest that high efficiency results from the force-feeding of star formation by a streamer of gas falling into the galaxy.

Turner, J L; Benford, D J; Consiglio, S M; Ho, P T P; Kovács, A; Meier, D S; Zhao, J -H

2015-01-01T23:59:59.000Z

479

Solar Cells, 3 (1981) 337 -340 337 HIGH EFFICIENCY BIFACIAL BACK SURFACE FIELD SOLAR CELLS  

E-Print Network [OSTI]

. CUEVAS, A. LUQUE, J. EGUREN and J. DEL ALAMO Instituto de Energia Solar, Escuela Tdcnica Superior deSolar Cells, 3 (1981) 337 - 340 337 HIGH EFFICIENCY BIFACIAL BACK SURFACE FIELD SOLAR CELLS A solar cells are presented. Effi- ciencies of 15.7% and 13.6% were measured under front and back air mass

del Alamo, Jesús A.

480

Review paper: Toward highly efficient quantum-dot-and dye-sensitized solar cells  

E-Print Network [OSTI]

Review paper: Toward highly efficient quantum-dot- and dye-sensitized solar cells Hongsik Choi Interface control Light harvesting Tandem solar cell a b s t r a c t Dye- and quantum-dot-sensitized solar technologies of silicon-based solar cells should be resolved [7]. Dye-sensitized solar cells (DSSCs) have been

Park, Byungwoo

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


481

Hybrid Carbon Nanotubes-TiO2 Photoanodes for High Efficiency Dye-Sensitized Solar Cells  

E-Print Network [OSTI]

Hybrid Carbon Nanotubes-TiO2 Photoanodes for High Efficiency Dye-Sensitized Solar Cells Kadiatou photoanodes for dye- sensitized solar cells (DSCs), based on nanocrystalline TiO2 with limited addition applied (i.e., soaking in TiCl4 to boost open circuit photovoltage). INTRODUCTION Dye-sensitized solar

482

Air-Stable High-Efficiency Solar Cells Using Improved Single-Walled Carbon Nanotube Films  

E-Print Network [OSTI]

1 Air-Stable High-Efficiency Solar Cells Using Improved Single-Walled Carbon Nanotube Films Kehang-3-5800-6983. #12;2 ABSTRACT We present the single-walled carbon nanotube/silicon (SWNT/Si) solar cells approaching, the PCEs of the fabricated solar cells slightly increased after six-month exposure in air without any

Maruyama, Shigeo

483

EARTH ABUNDANT MATERIALS FOR HIGH EFFICIENCY HETEROJUNCTION THIN FILM SOLAR CELLS  

E-Print Network [OSTI]

EARTH ABUNDANT MATERIALS FOR HIGH EFFICIENCY HETEROJUNCTION THIN FILM SOLAR CELLS Yun Seog Lee 1; * Corresponding author: buonassisi@mit.edu; ABSTRACT We investigate earth abundant materials for thin- film solar cuprous oxide (Cu2O) as a prototype candidate for investigation as an absorber layer in thin film solar

Ceder, Gerbrand

484

FIELD TEST OF A HIGH-EFFICIENCY, AUTOMATIC-DEFROST REFRIGERATOR-FREEZER  

E-Print Network [OSTI]

#12;FIELD TEST OF A HIGH-EFFICIENCY, AUTOMATIC- DEFROST REFRIGERATOR-FREEZER By Richard F. Topping and manufacture pre-production units for home usage tests. The purpose of the field test and the associated market been promising. The first five months of field test data have shown an average 57% decrease in energy

Oak Ridge National Laboratory

485

Design and global optimization of high-efficiency solar thermal systems  

E-Print Network [OSTI]

Design and global optimization of high-efficiency solar thermal systems with tungsten cermets David, Massachusetts 02139, USA bermel@mit.edu Abstract: Solar thermal, thermoelectric, and thermophotovoltaic (TPV by selective solar absorbers and TPV selective emitters. To improve these critical components, we study a class

Soljaèiæ, Marin

486

GE Hosts Visit by DOE to Kick Off High-Efficiency GeneratorDevelopment Program  

E-Print Network [OSTI]

, Program Manager for Distributed Energy and Electric Reliability, and James Daley, Team Leader for High. This reduction in generator losses will increase overall power plant energy efficiency, creating the potential to Produce Major Benefits for U. S. Utilities SCHENECTADY, NY ­ Date ­ Officials from the U.S. Department

487

Highly efficient separation of carbon dioxide by a metal-organic framework replete with  

E-Print Network [OSTI]

Highly efficient separation of carbon dioxide by a metal-organic framework replete with open metal capture of CO2, which is essential for natural gas purifi- cation and CO2 sequestration, has been reported media. carbon dioxide capture dynamic adsorption reticular chemistry Selective removal of CO2 from

Yaghi, Omar M.

488

A High Performance, Energy Efficient GALS Processor Microarchitecture with Reduced Implementation Complexity  

E-Print Network [OSTI]

A High Performance, Energy Efficient GALS Processor Microarchitecture with Reduced Implementation Complexity £ YongKang Zhu , David H. Albonesi Ý and Alper Buyuktosunoglu � Department of Electrical, achieves impressive energy savings for a relatively low per- formance cost. However, the approach requires

Albonesi, David H.

489

Efficient Transmitters and Receivers for High-Power Wireless Powering Systems  

E-Print Network [OSTI]

and Energy Engineering University of Colorado Boulder ,U.S.A. zoya@colorado.edu Abstract-- The efficiency plane waves carrying ultra-low power levels are scavenged or harvested from known transmitters typically in the UHF or microwave range [7,8]. High power levels are also used in some beaming applications with plane

Popovic, Zoya

490

High-efficient solar power systems based on thermionic converter with small gap  

SciTech Connect (OSTI)

Various configurations of power systems based on thermionic converter with small interelectrode gap have been considered. The results of studies of systems energy characteristics are presented. The high efficiency and perspectivety of such systems for different applications have been shown. {copyright} {ital 1996 American Institute of Physics.}

Nikolaev, Y.V.; Eryomin, S.A.; Kalmykov, S.S.; Karpechenko, Y.D.; Kucherov, R.Y.; Lapochkin, N.V. [Research Institute of Scientific Industrial Association ``Lutch``, 142100, Podolsk, Moscow Region (Russian Federation)

1996-03-01T23:59:59.000Z

491

Thermionic/AMTEC cascade converter concept for high-efficiency space power  

SciTech Connect (OSTI)

This paper presents trade studies that address the use of the thermionic/AMTEC cell--a cascaded, high-efficiency, static power conversion concept that appears well-suited to space power applications. Both the thermionic and AMTEC power conversion approaches have been shown to be promising candidates for space power. Thermionics offers system compactness via modest efficiency at high heat rejection temperatures, and AMTEC offers high efficiency at modest heat rejection temperature. From a thermal viewpoint the two are ideally suited for cascaded power conversion: thermionic heat rejection and AMTEC heat source temperatures are essentially the same. In addition to realizing conversion efficiencies potentially as high as 35--40%, such a cascade offers the following perceived benefits: survivability; simplicity; technology readiness; and technology growth. Mechanical approaches and thermal/electric matching criteria for integrating thermionics and AMTEC into a single conversion device are described. Focusing primarily on solar thermal space power applications, parametric trends are presented to show the performance and cost potential that should be achievable with present-day technology in cascaded thermionic/AMTEC systems.

Hagan, T.H. van; Smith, J.N. Jr. [General Atomics, San Diego, CA (United States); Schuller, M. [PL/VTP, Kirtland AFB, NM (United States)

1996-12-31T23:59:59.000Z

492

ORIGINAL ARTICLE Highly efficient GaAs solar cells by limiting light emission  

E-Print Network [OSTI]

ORIGINAL ARTICLE Highly efficient GaAs solar cells by limiting light emission angle Emily D Kosten1 solar cell under direct sunlight, light is received from the solar disk, but is re-emitted isotropically.1038/lsa.2013.1; published online 4 January 2013 Keywords: detailed balance; GaAs solar cell; light

Atwater, Harry

493

High efficiency light emitting diode with anisotropically etched GaN-sapphire interface  

E-Print Network [OSTI]

High efficiency light emitting diode with anisotropically etched GaN- sapphire interface M. H. Lo and optimization of a light-emitting diode projection micro-stereolithography three-dimensional manufacturingGaN micro-light emitting diodes Appl. Phys. Lett. 101, 231110 (2012) A bright cadmium-free, hybrid organic

494

High efficiency photovoltaic power conditioning system Hosam Sharabash, DVMM Krishna, Norbert Frhleke and Joachim Bcker  

E-Print Network [OSTI]

, Germany sharabash@lea.upb.de Abstract A new topology for photovoltaic Power Conditioning System (PCS, this redundant topol- ogy consists of two new components, one for DC/DC converter and one for inverter. The preHigh efficiency photovoltaic power conditioning system Hosam Sharabash, DVMM Krishna, Norbert

Paderborn, Universität

495

HIGH EFFICIENCY Cu(ln,Ga)SepBASED SOLAR CELLS: PROCESSING OF NOVEL ABSORBER STRUCTURES  

E-Print Network [OSTI]

be more optimally solved by either lowering substrate temperature or finding other suitable and low-cost ABSTRACT Our effort towards the attainment of high performance devices has yielded several devices, and 15.3% for a 4.85-cm* single cell. Achievement of a 17.2% device efficiency fabricated for operation

Scofield, John H.

496

Development of a PF Fired High Efficiency Power Plant (AD700)  

E-Print Network [OSTI]

Development of a PF Fired High Efficiency Power Plant (AD700) Rudolph Blum, Sven Kjær and Jørgen and nickel-based superalloys for the hottest sections of boilers, steam lines and turbines. Other targets were development of boiler and turbine designs for the more advanced conditions and finally economic

497

Hexachloroethane: a highly efficient reagent for the synthesis of chlorosilanes from hydrosilanes  

E-Print Network [OSTI]

Hexachloroethane: a highly efficient reagent for the synthesis of chlorosilanes from hydrosilanes online 27 May 2009 Keywords: Hexachloroethane Hydrosilanes Chlorosilanes Palladium(II) chloride of chlorosilanes from hydrosil- anes. A variety of chlorinating agents in combination with palladium(II) chloride

Theodorakis, Emmanuel

498

Piedmont Natural Gas- Residential Equipment Efficiency Program  

Broader source: Energy.gov [DOE]

Piedmont Natural Gas offers rebates on high-efficiency natural gas tankless water heaters, tank water heaters and furnaces. Customers on the 201-Residential Service Rate or 221-Residential Service...

499

Piedmont Natural Gas- Residential Equipment Efficiency Program  

Broader source: Energy.gov [DOE]

Piedmont Natural Gas offers rebates on high-efficiency natural gas tankless water heaters, tank water heaters and furnaces. Customers on the 101-Residential Service rate are eligible for these...

500

Energy Efficiency and Conservation Block Grant Program  

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

steam piping, etc.) and replacing electric water heaters with a high efficiency heat pump water heater. Conditions: None Categorical Exclusion(s) Applied: A9, B2.5, B5.1 *-For...