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1

Cascaded organic rankine cycles for waste heat utilization  

Science Conference Proceedings (OSTI)

A pair of organic Rankine cycle systems (20, 25) are combined and their respective organic working fluids are chosen such that the organic working fluid of the first organic Rankine cycle is condensed at a condensation temperature that is well above the boiling point of the organic working fluid of the second organic Rankine style system, and a single common heat exchanger (23) is used for both the condenser of the first organic Rankine cycle system and the evaporator of the second organic Rankine cycle system. A preferred organic working fluid of the first system is toluene and that of the second organic working fluid is R245fa.

Radcliff, Thomas D. (Vernon, CT); Biederman, Bruce P. (West Hartford, CT); Brasz, Joost J. (Fayetteville, NY)

2011-05-17T23:59:59.000Z

2

Development of a Direct Evaporator for the Organic Rankine Cycle  

Science Conference Proceedings (OSTI)

Presentation Title, Development of a Direct Evaporator for the Organic Rankine Cycle. Author(s), Donna Post Guillen, Helge Klockow, Matthew Lehar, Sebastian

3

Parabolic Trough Organic Rankine Cycle Power Plant  

DOE Green Energy (OSTI)

Arizona Public Service (APS) is required to generate a portion of its electricity from solar resources in order to satisfy its obligation under the Arizona Environmental Portfolio Standard (EPS). In recent years, APS has installed and operates over 4.5 MWe of fixed, tracking, and concentrating photovoltaic systems to help meet the solar portion of this obligation and to develop an understanding of which solar technologies provide the best cost and performance to meet utility needs. During FY04, APS began construction of a 1-MWe parabolic trough concentrating solar power plant. This plant represents the first parabolic trough plant to begin construction since 1991. The plant will also be the first commercial deployment of the Solargenix parabolic trough collector technology developed under contract to the National Renewable Energy Laboratory (NREL). The plant will use an organic Rankine cycle (ORC) power plant, provided by Ormat. The ORC power plant is much simpler than a conventional steam Rankine cycle power plant and allows unattended operation of the facility.

Canada, S.; Cohen, G.; Cable, R.; Brosseau, D.; Price, H.

2005-01-01T23:59:59.000Z

4

Design of organic Rankine cycles for conversion of waste heat in a polygeneration plant  

E-Print Network (OSTI)

Organic Rankine cycles provide an alternative to traditional steam Rankine cycles for the conversion of low grade heat sources, where steam cycles are known to be less efficient and more expensive. This work examines organic ...

DiGenova, Kevin (Kevin J.)

2011-01-01T23:59:59.000Z

5

Waste Heat Recovery by Organic Fluid Rankine Cycle  

E-Print Network (OSTI)

The use of Organic Rankine Cycle for waste heat recovery presents several characteristics which are analyzed in details. After a short comparison with steam cycles, the Organic Rankine Cycle is described : its simplicity is shown and achievable efficiencies versus heat source temperature are given. Available fluids are presented. The choice of the fluid allows a good adaptation to temperature and power for each application. The most interesting field for Organic Rankine Cycles are low mechanical powers of a few megawatts and medium temperatures, about 500 C/600 C, for flue gas. The very simple technology of turbines is shown. Three examples are presented. The first one is a test loop of 300 thermal kW built in BERTIN & Cie laboratory to experiment a supersonic turbine designed by the same company for organic vapor at 250 C. The second gives the main characteristics of recovery from exhaust gas of Diesel engines. The last deals with possible recovery from air quenching of clinker in cement plants.

Verneau, A.

1979-01-01T23:59:59.000Z

6

Development of a Direct Evaporator for the Organic Rankine Cycle  

Science Conference Proceedings (OSTI)

This paper describes research and development currently underway to place the evaporator of an Organic Rankine Cycle (ORC) system directly in the path of a hot exhaust stream produced by a gas turbine engine. The main goal of this research effort is to improve cycle efficiency and cost by eliminating the usual secondary heat transfer loop. The project’s technical objective is to eliminate the pumps, heat exchangers and all other added cost and complexity of the secondary loop by developing an evaporator that resides in the waste heat stream, yet virtually eliminates the risk of a working fluid leakage into the gaseous exhaust stream. The research team comprised of Idaho National Laboratory and General Electric Company engineers leverages previous research in advanced ORC technology to develop a new direct evaporator design that will reduce the ORC system cost by up to 15%, enabling the rapid adoption of ORCs for waste heat recovery.

Donna Post Guillen; Helge Klockow; Matthew Lehar; Sebastian Freund; Jennifer Jackson

2011-02-01T23:59:59.000Z

7

Analysis of Organic Rankine Cycle for Low and Medium Grade Heat Source  

Science Conference Proceedings (OSTI)

Organic Rankine cycle (ORC) is an effective technique to generate power from low and medium temperature heat source, including industrial waste heat, solar heat, geothermal and biomass etc. Advantages of ORC are high efficiency, simple system, environment ... Keywords: organic Rankine cycle, new energy, waste heat recovery

Zhonghe Han, Yida Yu

2012-07-01T23:59:59.000Z

8

Dynamic modeling and multivariable control of organic Rankine cycles in waste heat utilizing processes  

Science Conference Proceedings (OSTI)

In this paper, the dynamics of organic Rankine cycles (ORCs) in waste heat utilizing processes is investigated, and the physical model of a 100 kW waste heat utilizing process is established. In order to achieve both transient performance and steady-state ... Keywords: Linear quadratic regulator, Organic Rankine cycles, Process control

Jianhua Zhang; Wenfang Zhang; Guolian Hou; Fang Fang

2012-09-01T23:59:59.000Z

9

Recovered Energy Generation Using an Organic Rankine Cycle System  

Science Conference Proceedings (OSTI)

This paper describes the results of a project demonstrating the technical and economic feasibility of capturing thermal energy from a 35,000 hp (27 MW) gas turbine driving a natural gas pipeline compressor with a Recovered Energy Generation (REG) system to produce 5.5 MW of electricity with no additional fuel and near-zero emissions. The REG is based on a modified Organic Rankine Cycle (ORC). Other major system elements include a waste-heat-to-oil heat exchanger with bypass, oil-to-pentane heat exchanger with preheater, recuperator, condenser, pentane turbine, generator and synchronizing breaker and all power and control systems required for the automatic operation of the REG. When operating at design heat input available from the gas turbine exhaust, the REG system consistently delivered 5.5 MW or more output to the grid at up to 15 percent heat conversion efficiency. The REG system improved the overall energy efficiency by 28%, from 32% simple cycle efficiency to 41% for the combined system. Significant lessons learned from this project are discussed as well as measured performance and economic considerations.

Leslie, Neil [Gas Technology Institute; Sweetser, Richard [Exergy Partners Corp.; Zimron, Ohad [Ormat; Stovall, Therese K [ORNL

2009-01-01T23:59:59.000Z

10

The Organic Rankine Cycle System, Its Application to Extract Energy From Low Temperature Waste Heat  

E-Print Network (OSTI)

The conservation of energy by its recovery from low temperature waste heat is of increasing importance in today's world energy crisis. The Organic Rankine Cycle is a cost efficient and proven method of converting low temperature (200-400o F) waste heat to mechanical and/or electrical energy. Applying the Organic Rankine Cycle technology to typical liquid and mixed component condensing streams is described using actual examples. Selection of the organic working fluid is explored. The Rankine Cycle efficiency is directly dependent upon the temperature difference between its evaporating and condensing phases. The evaporating level is set by the heat source; therefore, to maximize efficiency, it is essential to obtain the lowest condensing temperature practical. Various condensing schemes are discussed emphasizing methods of optimizing the net output of the total system. Several Organic Rankine Cycle commercial applications are summarized with experience and general performance given. The economics and optimization techniques in typical applications including multiple heat sources are discussed.

Sawyer, R. H.; Ichikawa, S.

1980-01-01T23:59:59.000Z

11

Altheim geothermal Plant for electricity production by Organic Rankine Cycle turbogenerator  

SciTech Connect

The paper describes the plan of the town Altheim in Upper Austria to produce electricity by an Organic Rankine Cycle-turbogenerator in the field of utilization of low temperatured thermal water. The aim of the project is to improve the technical and economic situation of the geothermal plant.

Pernecker, Gerhard; Ruhland, Johannes

1996-01-24T23:59:59.000Z

12

Final Report. Conversion of Low Temperature Waste Heat Utilizing Hermetic Organic Rankine Cycle  

SciTech Connect

The design of waste heat recovery using the organic Rankine cycle (ORC) engine is updated. Advances in power electronics with lower cost enable the use of a single shaft, high-speed generator eliminating wear items and allowing hermetic sealing of the working fluid. This allows maintenance free operation and a compact configuration that lowers cost, enabling new market opportunities.

Fuller, Robert L.

2005-04-20T23:59:59.000Z

13

Draft report: application of organic Rankine cycle heat recovery systems to diesel powered marine vessels  

DOE Green Energy (OSTI)

The analysis and results of an investigation of the application of organic Rankine cycle heat recovery systems to diesel-powered marine vessels are described. The program under which this study was conducted was sponsored jointly by the US Energy Research and Development Administration, the US Navy, and the US Maritime Administration. The overall objective of this study was to investigate diesel bottoming energy recovery systems, currently under development by three US concerns, to determine the potential for application to marine diesel propulsion and auxiliary systems. The study primarily focused on identifying the most promising vessel applications (considering vessel type, size, population density, operational duty cycle, etc.) so the relative economic and fuel conservation merits of energy recovery systems could be determined and assessed. Vessels in the current fleet and the projected 1985 fleet rated at 1000 BHP class and above were investigated.

Not Available

1977-07-15T23:59:59.000Z

14

Transposed critical temperature Rankine thermodynamic cycle  

DOE Green Energy (OSTI)

The transposed critical temperature (TPCT) is shown to be an extremely important thermodynamic property in the selection of the working fluid and turbine states for optimized geothermal power plants operating on a closed organic (binary) Rankine cycle. When the optimum working fluid composition and process states are determined for given source and sink conditions (7 parameter optimization), turbine inlet states are found to be consistently adjacent to the low pressure side of the working fluids' TPCT line on pressure-enthalpy coordinates. Although the TPCT concepts herein may find numerous future applications in high temperature, advanced cycles for fossil or nuclear fired steam power plants and in supercritical organic Rankine heat recovery bottoming cycles for Diesel engines, this discussion is limited to moderate temperature (150 to 250/sup 0/C) closed simple organic Rankine cycle geothermal power plants. Conceptual design calculations pertinent to the first geothermal binary cycle Demonstration Plant are included.

Pope, W.L.; Doyle, P.A.

1980-04-01T23:59:59.000Z

15

Thermal Stability of Cyclopentane as an Organic Rankine Cycle Working Fluid  

Science Conference Proceedings (OSTI)

Laboratory experiments were performed to aid in determining the maximum operating temperature for cyclopentane as an Organic Rankine Cycle working fluid. The thermochemical decomposition of cyclopentane was measured in a recirculation loop at 240 C, 300 C and 350 C at 43 bar in a glass-lined heated tube. It was determined that in the absence of air at the lower two temperatures, decomposition was minor after more than twelve days of continuous operation. At 240 C, the total cyclopentane decomposition products were approximately 65 parts per million (ppm) and at 300 C, total decomposition products were on the order of 270 ppm at the end of the experiment. At 350 C, decomposition products were significantly higher and reached 1,500 ppm. When the feed was contacted with air, the decomposition rate increased dramatically. Residues found in the reactor after the decomposition experiments were examined by a number of different techniques. The mass of the residues increased with experimental temperature, but was lower at the same temperature when the feed was contacted with air. Analysis of the residues suggested that the residues were primarily heavy saturated hydrocarbons.

Daniel M. Ginosar; Lucia M. Petkovic; Donna Post Guillen

2011-08-01T23:59:59.000Z

16

Definition: Rankine cycle | Open Energy Information  

Open Energy Info (EERE)

Rankine cycle Rankine cycle Jump to: navigation, search Dictionary.png Rankine cycle Sometimes referred to as the steam cycle. Fuel is used to heat a liquid to produce a high pressure gas that expands and produces work, such as turning a turbine; when the turbine is connected to a generator, it produces electricity. Usually water is the liquid used in the Rankine cycle (to produce steam), but other liquids can also be used. The exhaust vapor expelled from the turbine condenses and the liquid is pumped back to the boiler to repeat the cycle.[1][2] View on Wikipedia Wikipedia Definition The Rankine cycle is a mathematical model that is used to predict the performance of steam engines. The Rankine cycle is an idealised thermodynamic cycle of a heat engine that converts heat into mechanical

17

Organic Rankine-Cycle Power Systems Working Fluids Study: Topical report No. 3, 2-methylpyridine/water  

DOE Green Energy (OSTI)

A mixture of 35 mole percent (mol %) 2-methylpyridine and 65 mol % water was tested at 575, 625, and 675/degree/F in a dynamic loop. Samples of the degraded fluid were chemically analyzed to determine the identities of major degradation products and the quantity of degradation. Computed degradation rates were found to be higher than those for Fluorinol 85 or toluene. For this reason (and other reasons, related to fluid handling), other fluids are recommended as the first choice for service in organic Rankine-cycle systems in preference to 2-methylpyridine/water. 7 refs., 39 figs., 39 tabs.

Cole, R.L.; Demirgian, J.C.; Allen, J.W.

1987-09-01T23:59:59.000Z

18

[en] SIMULATION OF AN ORGANIC RANKINE CYCLE POWERED BY SOLAR ENERGY.  

E-Print Network (OSTI)

??[pt] Esta simulação considera um ciclo Rankine que utiliza um fluido de trabalho orgânico, com a particularidade que a fonte de energia de entrada ao… (more)

ERNESTO JAVIER RUANO HERRERIA

2013-01-01T23:59:59.000Z

19

Organic Rankine Cycle Systems for Waste Heat Recovery in Refineries and Chemical Process Plants  

E-Print Network (OSTI)

The design of a low temperature Rankine cycle system using R-113 working fluid for recovery and conversion of process waste heat is described for typical applications in oil refineries and chemical plants. The system is designed to produce electric power from waste heat available in a temperature range from 180oF to 400oF. The design of a new ORC turbo generator uniquely adapted to applications of this type is presented. The unit has been designed for power outputs from 3/4 to 2 1/2 MW and turbine inlet temperatures from 170 to 260oF. The machine design has eliminated the need for shaft seals, shaft couplings and the usual lube oil console normally required for turbine-generator units. Results of prototype tests of a 1 MW unit are presented. A product package and recommended division of responsibilities between purchaser, A&E company and supplier is presented for installations in refineries and process plants. The product package covers the electrical power range from 3/4 to 5 MW and waste heat streams from 20 to 130 million BTU/hr.

Meacher, J. S.

1981-01-01T23:59:59.000Z

20

Final Report: Modifications and Optimization of the Organic Rankine Cycle to Improve the Recovery of Waste Heat  

Science Conference Proceedings (OSTI)

This research and development (R&D) project exemplifies a shared public private commitment to advance the development of energy efficient industrial technologies that will reduce the U.S. dependence upon foreign oil, provide energy savings and reduce greenhouse gas emissions. The purpose of this project was to develop and demonstrate a Direct Evaporator for the Organic Rankine Cycle (ORC) for the conversion of waste heat from gas turbine exhaust to electricity. In conventional ORCs, the heat from the exhaust stream is transferred indirectly to a hydrocarbon based working fluid by means of an intermediate thermal oil loop. The Direct Evaporator accomplishes preheating, evaporation and superheating of the working fluid by a heat exchanger placed within the exhaust gas stream. Direct Evaporation is simpler and up to 15% less expensive than conventional ORCs, since the secondary oil loop and associated equipment can be eliminated. However, in the past, Direct Evaporation has been avoided due to technical challenges imposed by decomposition and flammability of the working fluid. The purpose of this project was to retire key risks and overcome the technical barriers to implementing an ORC with Direct Evaporation. R&D was conducted through a partnership between the Idaho National Laboratory (INL) and General Electric (GE) Global Research Center (GRC). The project consisted of four research tasks: (1) Detailed Design & Modeling of the ORC Direct Evaporator, (2) Design and Construction of Partial Prototype Direct Evaporator Test Facility, (3) Working Fluid Decomposition Chemical Analyses, and (4) Prototype Evaluation. Issues pertinent to the selection of an ORC working fluid, along with thermodynamic and design considerations of the direct evaporator, were identified. The FMEA (Failure modes and effects analysis) and HAZOP (Hazards and operability analysis) safety studies performed to mitigate risks are described, followed by a discussion of the flammability analysis of the direct evaporator. A testbed was constructed and the prototype demonstrated at the GE GRC Niskayuna facility.

Donna Post Guillen; Jalal Zia

2013-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "organic rankine cycle" 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

Rankine cycle machines for solar cooling  

DOE Green Energy (OSTI)

A vigorous effort to develop and demonstrate practical uses of solar energy to heat and cool buildings, to process agricultural products, and to provide thermal and electrical energy for industry has been initiated. One significant part of this effort is the research, development, and demonstration of Rankine cycle machines using fluids heated by solar energy. Recent developments in three such devices are discussed briefly.

Weathers, H.M.

1978-08-01T23:59:59.000Z

22

Use of organic working fluids in Rankine engines  

DOE Green Energy (OSTI)

A compilation is presented of state-of-the-art data on the use of organic working fluids in operational Rankine cycle engines. Particular attention is given to the determination of the maximum temperatures used for various working fluids in operational Rankine cycle engines and identification of thermal instability and chemical reaction problems related to these temperatures. Information is included on the characteristics and selection of working fluids; the behavior of lubricating oils in contact with working fluids; operational experience; and recommended organic fluids R and D. (LCL)

Curran, H M

1979-09-01T23:59:59.000Z

23

Design and development of an automotive organic Rankine-cycle powerplant with a reciprocating expander. Final report. Volume II. Detailed discussion  

DOE Green Energy (OSTI)

Work performed for the design and development of an organic Rankine-cycle engine for automobile propulsion is reported. An automotive power plant using an organic Rankine-cycle system with a reciprocating expander has been designed, built, and tested on an engine dynamometer in a preprototype configuration. The system is designed to provide performance approximately equivalent to that of a 351-CID internal combustion engine in the reference car, a 1972 Ford Galaxie 500. A description of the preprototype system, major components, and results from component and system testing are presented. The fuel economy based on steady-state measurements is estimated to be 10.2 mpg over the federal driving cycle with a maximum of 16 mpg at 30 mph. Projections of steady-state emission measurements show compliance with the 1970 Clean Air Act standards for 1978 vehicle emissions. The levels for unburned hydrocarbons, carbon monoxide, and oxides of nitrogen were 41 percent, 6 percent, and 69 percent of the standards, respectively. At the conclusion of the preprototype phase of the program, a prototype design effort was initiated to upgrade and improve the performance of the preprototype system. The reference vehicle for this prototype design is a compact car in the weight class of a 1974 Ford Pinto. The results of this design study, including performance projections, are also presented.

Not Available

1977-09-01T23:59:59.000Z

24

Rankine bottoming cycle safety analysis. Final report  

SciTech Connect

Vector Engineering Inc. conducted a safety and hazards analysis of three Rankine Bottoming Cycle Systems in public utility applications: a Thermo Electron system using Fluorinal-85 (a mixture of 85 mole % trifluoroethanol and 15 mole % water) as the working fluid; a Sundstrand system using toluene as the working fluid; and a Mechanical Technology system using steam and Freon-II as the working fluids. The properties of the working fluids considered are flammability, toxicity, and degradation, and the risks to both plant workers and the community at large are analyzed.

Lewandowski, G.A.

1980-02-01T23:59:59.000Z

25

Solar Trough Organic Rankine Electricity System (STORES) Stage 1: Power Plant Optimization and Economics; November 2000 -- May 2005  

DOE Green Energy (OSTI)

Report regarding a Stage 1 Study to further develop the concept of the Solar Trough Organic Rankine Cycle Electricity Systems (STORES).

Prabhu, E.

2006-03-01T23:59:59.000Z

26

Investigating potential efficiency improvement for light-duty transportation applications through simulation of an organic Rankine cycle for waste-heat recovery  

SciTech Connect

Modern diesel engines used in light-duty transportation applications have peak brake thermal efficiencies in the range of 40-42% for high-load operation with substantially lower efficiencies at realistic road-load conditions. Thermodynamic energy and exergy analysis reveals that the largest losses from these engines are due to heat loss and combustion irreversibility. Substantial improvement in overall engine efficiency requires reducing or recovering these losses. Unfortunately, much of the heat transfer either occurs at relatively low temperatures resulting in large entropy generation (such as in the air-charge cooler), is transferred to low-exergy flow streams (such as the oil and engine coolant), or is radiated or convected directly to the environment. While there are significant opportunities for recovery from the exhaust and EGR cooler for heavy-duty applications, the potential benefits of such a strategy for light-duty applications are unknown due to transient operation, low-load operation at typical driving conditions, and the added mass of the system. We have developed an organic Rankine cycle model using GT-Suite to investigate the potential for efficiency improvement through waste-heat recovery from the exhaust and EGR cooler of a light-duty diesel engine. Results from steady-state and drive-cycle simulations are presented, and we discuss strategies to address operational difficulties associated with transient drive cycles and competition between waste-heat recovery systems, turbochargers, aftertreatment devices, and other systems for the limited thermal resources.

Edwards, Kevin Dean [ORNL; Wagner, Robert M [ORNL

2010-01-01T23:59:59.000Z

27

Milestone Report #2: Direct Evaporator Leak and Flammability Analysis Modifications and Optimization of the Organic Rankine Cycle to Improve the Recovery of Waste Heat  

Science Conference Proceedings (OSTI)

The direct evaporator is a simplified heat exchange system for an Organic Rankine Cycle (ORC) that generates electricity from a gas turbine exhaust stream. Typically, the heat of the exhaust stream is transferred indirectly to the ORC by means of an intermediate thermal oil loop. In this project, the goal is to design a direct evaporator where the working fluid is evaporated in the exhaust gas heat exchanger. By eliminating one of the heat exchangers and the intermediate oil loop, the overall ORC system cost can be reduced by approximately 15%. However, placing a heat exchanger operating with a flammable hydrocarbon working fluid directly in the hot exhaust gas stream presents potential safety risks. The purpose of the analyses presented in this report is to assess the flammability of the selected working fluid in the hot exhaust gas stream stemming from a potential leak in the evaporator. Ignition delay time for cyclopentane at temperatures and pressure corresponding to direct evaporator operation was obtained for several equivalence ratios. Results of a computational fluid dynamic analysis of a pinhole leak scenario are given.

Donna Post Guillen

2013-09-01T23:59:59.000Z

28

Conceptual design and cost evaluation of organic Rankine cycle electric generating plant powered by medium temperature geothermal water  

DOE Green Energy (OSTI)

The economic production of electrical power from high temperature steam and liquid dominated geothermal resources has been demonstrated. Large quantities of geothermal energy are considered to exist at moderate temperatures, however, the economics of converting this energy into electricity has not been established. This paper presents the design concept of a dual boiler isobutane cycle selected for use with the moderate temperature hydrothermal resource and presents a cost estimate for a 10 and 50 MW power plant. Cost of electrical power from these plants is estimated and compared with that from coal, oil and nuclear plants. The impact of selling a portion of the residual heat in the geothermal effluent is assessed. (auth)

Dart, R.H.; Neill, D.T.; Whitbeck, J.F.

1975-12-01T23:59:59.000Z

29

Method of optimizing performance of Rankine cycle power plants  

DOE Patents (OSTI)

A method for efficiently operating a Rankine cycle power plant (10) to maximize fuel utilization efficiency or energy conversion efficiency or minimize costs by selecting a turbine (22) fluid inlet state which is substantially in the area adjacent and including the transposed critical temperature line (46).

Pope, William L. (Walnut Creek, CA); Pines, Howard S. (El Cerrito, CA); Doyle, Padraic A. (Oakland, CA); Silvester, Lenard F. (Richmond, CA)

1982-01-01T23:59:59.000Z

30

Investigations of supercritical CO2 Rankine cycles for geothermal power plants  

Science Conference Proceedings (OSTI)

Supercritical CO2 Rankine cycles are investigated for geothermal power plants. The system of equations that describe the thermodynamic cycle is solved using a Newton-Rhapson method. This approach allows a high computational efficiency of the model when thermophysical properties of the working fluid depend strongly on the temperature and pressure. Numerical simulation results are presented for different cycle configurations in order to assess the influences of heat source temperature, waste heat rejection temperatures and internal heat exchanger design on cycle efficiency. The results show that thermodynamic cycle efficiencies above 10% can be attained with the supercritical brayton cycle while lower efficiencies can be attained with the transcritical CO2 Rankine cycle.

Sabau, Adrian S [ORNL; Yin, Hebi [ORNL; Qualls, A L [ORNL; McFarlane, Joanna [ORNL

2011-01-01T23:59:59.000Z

31

Method of optimizing performance of Rankine cycle power plants. [US DOE Patent  

DOE Patents (OSTI)

A method is described for efficiently operating a Rankine cycle power plant to maximize fuel utilization efficiency or energy conversion efficiency or minimize costs by selecting a turbine fluid inlet state which is substantially on the area adjacent and including the transposed critical temperature line.

Pope, W.L.; Pines, H.S.; Doyle, P.A.; Silvester, L.F.

1980-06-23T23:59:59.000Z

32

Reduced gravity rankine cycle design and optimization with passive vortex phase separation  

E-Print Network (OSTI)

Liquid-metal Rankine power conversion systems (PCS) coupled with a fission reactor remain an attractive option for space power applications because system specific power and efficiency is very favorable for plant designs of 100 kW(e) or higher. Potential drawbacks to the technology in a reduced gravity environment include two-phase fluid management processes such as liquid-vapor phase separation. The most critical location for phase separation is at the boiler exit where only vapor must be sent to the turbine because blade erosion occurs from high velocity liquid droplets entrained by vapor flow. Previous studies have proposed that rotary separators be used to separate the liquid and vapor from a two phase mixture. However these devices have complex turbo machinery, require kilowatts of power and are untested for high vapor flow conditions. The Interphase Transport Phenomena (ITP) laboratory has developed a low-power, passive microgravity vortex phase separator (MVS) which has already proven to be an essential component of two-phase systems operating in low gravity environments. This thesis presents results from flight experiments where a Rankine cycle was operated in a reduced gravity environment for the first time by utilizing the MVS for liquid and vapor phase separation. The MVS was able to operate under saturated conditions and adjust to system transients as it would in the Rankine cycle by controlling the amount of liquid and vapor within the device. A new model is developed for the MVS to predict separation performance at high vapor flow conditions for sizing the separator at the boiler, condenser, and turbine locations within the cycle by using a volume limiting method. This model factors in the following separator characteristics: mass, pumping power, and available buffer volume for system transients. The study is concluded with overall Rankine efficiency and performance changes due to adding vortex phase separation and a schematic of the Rankine cycle with the integration of the MVS is presented. The results from this thesis indicate the thermal to electric efficiency and specific mass of the cycle can be improved by using the MVS to separate the two phases instead of a rotary separator.

Supak, Kevin Robert

2007-12-01T23:59:59.000Z

33

Reduced gravity Rankine cycle system design and optimization study with passive vortex phase separation  

E-Print Network (OSTI)

Liquid-metal Rankine power conversion systems (PCS) coupled with a fission reactor remain an attractive option for space power applications because system specific power and efficiency is very favorable for plant designs of 100 kW(e) or higher. Potential drawbacks to the technology in a reduced gravity environment include two-phase fluid management processes such as liquid-vapor phase separation. The most critical location for phase separation is at the boiler exit where only vapor must be sent to the turbine because blade erosion occurs from high velocity liquid droplets entrained by vapor flow. Previous studies have proposed that rotary separators be used to separate the liquid and vapor from a two phase mixture. However these devices have complex turbo machinery, require kilowatts of power and are untested for high vapor flow conditions. The Interphase Transport Phenomena (ITP) laboratory has developed a low-power, passive microgravity vortex phase separator (MVS) which has already proven to be an essential component of two-phase systems operating in low gravity environments. This thesis presents results from flight experiments where a Rankine cycle was operated in a reduced gravity environment for the first time by utilizing the MVS for liquid and vapor phase separation. The MVS was able to operate under saturated conditions and adjust to system transients as it would in the Rankine cycle by controlling the amount of liquid and vapor within the device. A new model is developed for the MVS to predict separation performance at high vapor flow conditions for sizing the separator at the boiler, condenser, and turbine locations within the cycle by using a volume limiting method. This model factors in the following separator characteristics: mass, pumping power, and available buffer volume for system transients. The study is concluded with overall Rankine efficiency and performance changes due to adding vortex phase separation and a schematic of the Rankine cycle with the integration of the MVS is presented. The results from this thesis indicate the thermal to electric efficiency and specific mass of the cycle can be improved by using the MVS to separate the two phases instead of a rotary separator.

Supak, Kevin Robert

2007-12-01T23:59:59.000Z

34

Nexant Parabolic Trough Solar Power Plant Systems Analysis; Task 2: Comparison of Wet and Dry Rankine Cycle Heat Rejection, 20 January 2005 - 31 December 2005  

DOE Green Energy (OSTI)

Subcontract report by Nexant, Inc., regarding a system analysis comparing solar parabolic trough plants with wet and dry rankine cycle heat rejection.

Kelly, B.

2006-07-01T23:59:59.000Z

35

Technical and economic evaluation of a Brayton-Rankine combined-cycle solar-thermal power plant  

DOE Green Energy (OSTI)

The objective of this study is to conduct an assessment of gas-liquid direct-contact heat exchange and of a new storage-coupled system (the open-cycle Brayton/steam Rankine combined cycle). Both technical and economic issues are evaluated. Specifically, the storage-coupled combined cycle is compared with a molten salt system. The open Brayton cycle system is used as a topping cycle, and the reject heat powers the molten salt/Rankine system. In this study the molten salt system is left unmodified, the Brayton cycle is integrated on top of a Martin Marietta description of an existing molten salt plant. This compares a nonoptimized combined cycle with an optimized molten salt system.

Wright, J. D.

1981-05-01T23:59:59.000Z

36

The Design of an Open Rankine-Cycle Industrial Heat Pump  

E-Print Network (OSTI)

An open Rankine-cycle heat pump is ideally suited for producing low-pressure industrial process steam. Because steam serves as both the heat pump motive fluid and process fluid, the system achieves a unique simplicity and versatility. No intermediate refrigerant fluid exists for which to construct a process interface or impose a temperature limit. Interface components such as the heat pump condenser are not required. Moreover, the use of water vapor eliminates toxicity and flammability risks inherent with most closed-cycle heat pump fluids. The control strategy is simple. Low-pressure (subatmospheric) water vapor, generated by flashing steam at a temperature below that of the waste stream, is compressed to the process pressure and temperature by an electric-motor-driven, multistage compressor train. This strategy permits the heat pump to accommodate upsets such as sudden changes in the waste stream flow and/or temperature, as well as fluctuation within the process stream.

Leibowitz, H. M.; Chaudoir, D. W.

1981-01-01T23:59:59.000Z

37

ECONOMICS AND FEASIBILITY OF RANKINE CYCLE IMPROVEMENTS FOR COAL FIRED POWER PLANTS  

SciTech Connect

ALSTOM Power Inc.'s Power Plant Laboratories (ALSTOM) has teamed with the U.S. Department of Energy National Energy Technology Laboratory (DOE NETL), American Electric Company (AEP) and Parsons Energy and Chemical Group to conduct a comprehensive study evaluating coal fired steam power plants, known as Rankine Cycles, equipped with three different combustion systems: Pulverized Coal (PC), Circulating Fluidized Bed (CFB), and Circulating Moving Bed (CMB{trademark}). Five steam cycles utilizing a wide range of steam conditions were used with these combustion systems. The motivation for this study was to establish through engineering analysis, the most cost-effective performance potential available through improvement in the Rankine Cycle steam conditions and combustion systems while at the same time ensuring that the most stringent emission performance based on CURC (Coal Utilization Research Council) 2010 targets are met: > 98% sulfur removal; < 0.05 lbm/MM-Btu NO{sub x}; < 0.01 lbm/MM-Btu Particulate Matter; and > 90% Hg removal. The final report discusses the results of a coal fired steam power plant project, which is comprised of two parts. The main part of the study is the analysis of ten (10) Greenfield steam power plants employing three different coal combustion technologies: Pulverized Coal (PC), Circulating Fluidized Bed (CFB), and Circulating Moving Bed (CMB{trademark}) integrated with five different steam cycles. The study explores the technical feasibility, thermal performance, environmental performance, and economic viability of ten power plants that could be deployed currently, in the near, intermediate, and long-term time frame. For the five steam cycles, main steam temperatures vary from 1,000 F to 1,292 F and pressures from 2,400 psi to 5,075 psi. Reheat steam temperatures vary from 1,000 F to 1,328 F. The number of feedwater heaters varies from 7 to 9 and the associated feedwater temperature varies from 500 F to 626 F. The main part of the study therefore determines the steam cycle parameters and combustion technology that would yield the lowest cost of electricity (COE) for the next generation of coal-fired steam power plants. The second part of the study (Repowering) explores the means of upgrading the efficiency and output of an older existing coal fired steam power plant. There are currently more than 1,400 coal-fired units in operation in the United States generating about 54 percent of the electricity consumed. Many of these are modern units are clean and efficient. Additionally, there are many older units in excellent condition and still in service that could benefit from this repowering technology. The study evaluates the technical feasibility, thermal performance, and economic viability of this repowering concept.

Richard E. Waryasz; Gregory N. Liljedahl

2004-09-08T23:59:59.000Z

38

ECONOMICS AND FEASIBILITY OF RANKINE CYCLE IMPROVEMENTS FOR COAL FIRED POWER PLANTS  

SciTech Connect

ALSTOM Power Inc.'s Power Plant Laboratories (ALSTOM) has teamed with the U.S. Department of Energy National Energy Technology Laboratory (DOE NETL), American Electric Company (AEP) and Parsons Energy and Chemical Group to conduct a comprehensive study evaluating coal fired steam power plants, known as Rankine Cycles, equipped with three different combustion systems: Pulverized Coal (PC), Circulating Fluidized Bed (CFB), and Circulating Moving Bed (CMB{trademark}). Five steam cycles utilizing a wide range of steam conditions were used with these combustion systems. The motivation for this study was to establish through engineering analysis, the most cost-effective performance potential available through improvement in the Rankine Cycle steam conditions and combustion systems while at the same time ensuring that the most stringent emission performance based on CURC (Coal Utilization Research Council) 2010 targets are met: > 98% sulfur removal; < 0.05 lbm/MM-Btu NO{sub x}; < 0.01 lbm/MM-Btu Particulate Matter; and > 90% Hg removal. The final report discusses the results of a coal fired steam power plant project, which is comprised of two parts. The main part of the study is the analysis of ten (10) Greenfield steam power plants employing three different coal combustion technologies: Pulverized Coal (PC), Circulating Fluidized Bed (CFB), and Circulating Moving Bed (CMB{trademark}) integrated with five different steam cycles. The study explores the technical feasibility, thermal performance, environmental performance, and economic viability of ten power plants that could be deployed currently, in the near, intermediate, and long-term time frame. For the five steam cycles, main steam temperatures vary from 1,000 F to 1,292 F and pressures from 2,400 psi to 5,075 psi. Reheat steam temperatures vary from 1,000 F to 1,328 F. The number of feedwater heaters varies from 7 to 9 and the associated feedwater temperature varies from 500 F to 626 F. The main part of the study therefore determines the steam cycle parameters and combustion technology that would yield the lowest cost of electricity (COE) for the next generation of coal-fired steam power plants. The second part of the study (Repowering) explores the means of upgrading the efficiency and output of an older existing coal fired steam power plant. There are currently more than 1,400 coal-fired units in operation in the United States generating about 54 percent of the electricity consumed. Many of these are modern units are clean and efficient. Additionally, there are many older units in excellent condition and still in service that could benefit from this repowering technology. The study evaluates the technical feasibility, thermal performance, and economic viability of this repowering concept.

Richard E. Waryasz; Gregory N. Liljedahl

2004-09-08T23:59:59.000Z

39

Design and development of an automotive propulsion system utilizing a Rankine cycle engine (water based fluid). Final report  

DOE Green Energy (OSTI)

Under EPA and ERDA sponsorship, SES successfully designed, fabricated and tested the first federally sponsored steam powered automobile. The automobile - referred to as the simulator - is a 1975 Dodge Monaco standard size passenger car with the SES preprototype Rankine cycle automotive propulsion system mounted in the engine compartment. In the latter half of 1975, the simulator successfully underwent test operations at the facilities of SES in Watertown, Massachusetts and demonstrated emission levels below those of the stringent federally established automotive requirements originally set for implementation by 1976. The demonstration was accomplished during testing over the Federal Driving Cycle on a Clayton chassis dynamometer. The design and performance of the vehicle are described.

Demler, R.L.

1977-09-01T23:59:59.000Z

40

Scaling of Thermal-Hydraulic Experiments for a Space Rankine Cycle and Selection of a Preconceptual Scaled Experiment Design  

Science Conference Proceedings (OSTI)

To assist with the development of a space-based Rankine cycle power system using liquid potassium as the working fluid, a study has been conducted on possible scaled experiments with simulant fluids. This report will consider several possible working fluids and describe a scaling methodology to achieve thermal-hydraulic similarity between an actual potassium system and scaled representations of the Rankine cycle boiler or condenser. The most practical scaling approach examined is based on the selection of perfluorohexane (FC-72) as the simulant. Using the scaling methodology, a series of possible solutions have been calculated for the FC-72 boiler and condenser. The possible scaled systems will then be compared and preconceptual specifications and drawings given for the most promising design. The preconceptual design concept will also include integrating the scaled boiler and scaled condenser into a single experimental loop. All the preconceptual system specifications appear practical from a fabrication and experimental standpoint, but further work will be needed to arrive at a final experiment design.

Sulfredge, CD

2006-01-27T23:59:59.000Z

Note: This page contains sample records for the topic "organic rankine cycle" 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

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

E-Print Network (OSTI)

of low-grade heat," Renewable and Sustainable Energyof various applications," Renewable and Sustainable Energyorganic Rankine cycle," Renewable Energy, vol. 4, pp. 1196-

Ho, Tony

2012-01-01T23:59:59.000Z

42

Multi-Megawatt Organic Rankine Engine power plant (MORE). Phase IA final report: system design of MORE power plant for industrial energy conservation emphasizing the cement industry  

SciTech Connect

The Multi-Megawatt Organic Rankine Engine (MORE) program is directed towards the development of a large, organic Rankine power plant for energy conservation from moderate temperature industrial heat streams. Organic Rankine power plants are ideally suited for use with heat sources in the temperature range below 1100/sup 0/F. Cement manufacture was selected as the prototype industry for the MORE system because of the range of parameters which can be tested in a cement application. This includes process exit temperatures of 650/sup 0/F to 1110/sup 0/F for suspension preheater and long dry kilns, severe dust loading, multi-megawatt power generation potential, and boiler exhaust gas acid dew point variations. The work performed during the Phase IA System Design contract period is described. The System Design task defines the complete MORE system and its installation to the level necessary to obtain detailed performance maps, equipment specifications, planning of supporting experiments, and credible construction and hardware cost estimates. The MORE power plant design is based upon installation in the Black Mountain Quarry Cement Plant near Victorville, California.

Bair, E.K.; Breindel, B.; Collamore, F.N.; Hodgson, J.N.; Olson, G.K.

1980-01-31T23:59:59.000Z

43

Test Requirements and Conceptual Design for a Potassium Test Loop to Support an Advanced Potassium Rankine Cycle Power Conversion Systems  

SciTech Connect

Parameters for continuing the design and specification of an experimental potassium test loop are identified in this report. Design and construction of a potassium test loop is part of the Phase II effort of the project ''Technology Development Program for an Advanced Potassium Rankine Power Conversion System''. This program is supported by the National Aeronautics and Space Administration. Design features for the potassium test loop and its instrumentation system, specific test articles, and engineered barriers for ensuring worker safety and protection of the environment are described along with safety and environmental protection requirements to be used during the design process. Information presented in the first portion of this report formed the basis to initiate the design phase of the program; however, the report is a living document that can be changed as necessary during the design process, reflecting modifications as additional design details are developed. Some portions of the report have parameters identified as ''to be determined'' (TBD), reflecting the early stage of the overall process. In cases where specific design values are presently unknown, the report attempts to document the quantities that remain to be defined in order to complete the design of the potassium test loop and supporting equipment.

Yoder, JR.G.L.

2006-03-08T23:59:59.000Z

44

Modeling, design and analysis of micro-scale Rankine-based systems  

E-Print Network (OSTI)

This thesis presents the modeling and design of two major types of micro Rankine-cycle-based machines: a single-Rankine-based power system and a waste-heat-driven cooler. As part of the Massachusetts Institute of Technology ...

Cui, Ling, 1978-

2004-01-01T23:59:59.000Z

45

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

E-Print Network (OSTI)

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

Shao, Yingjuan

2011-01-01T23:59:59.000Z

46

Variable pressure supercritical Rankine cycle for integrated natural gas and power production from the geopressured geothermal resource  

DOE Green Energy (OSTI)

A small-scale power plant cycle that utilizes both a variable pressure vaporizer (heater) and a floating pressure (and temperature) air-cooled condenser is described. Further, it defends this choice on the basis of classical thermodynamics and minimum capital cost by supporting these conclusions with actual comparative examples. The application suggested is for the geopressured geothermal resource. The arguments cited in this application apply to any process (petrochemical, nuclear, etc.) involving waste heat recovery.

Goldsberry, F.L.

1982-03-01T23:59:59.000Z

47

Test and evaluation of a solar-powered laboratory turbocompressor system for building heating and cooling. Final technical report. [Rankine cycle  

SciTech Connect

Extensive testing of an available laboratory Rankine-cycle turbocompressor cooling system was conducted over a range of temperatures consistent with present-day flat-plate and advanced medium-concentration solar collectors and at air- and water-cooled condenser temperature levels. Over 700 hours of testing demonstrated the high performance potential of such systems over a wide range of operational conditions and has provided design guidelines and preliminary specifications for future systems. Minor modifications were made to the laboratory system. These modifications included: (1) demonstration of three tons of cooling at a turbine inlet temperature of about 160 F, (2) efficient operation (i.e., COP of approximately 0.45) at turbine inlet temperatures of 240 F at air-cooled condenser temperatures, and (3) a COP in excess of 0.5 and more than five tons of cooling at system turbine inlet temperature levels of 200 F with water-cooled condenser temperatures. Generally, the test data correlated very well with detailed analytical design and off-design performance projections over the range of operating conditions. These data correlations indicate that the achieved performance levels were limited by mismatching of the existing turbomachinery elements. Data and experience obtained in this program substantiate the judgment that incorporating well-matched turbomachinery, based on existing technology, would result in the achievement of the full potential of a turbocompressor system for both air- and water-cooled operation. Prototype turbocompressor systems can be designed and developed which demonstrate high performance, (i.e., a COP approaching 1.0 and 0.75 for water and air-cooled operation, respectively), versatile operational features, permitting use of different collectors with a range of temperature capability, and potential for significant energy savings when used as solar-powered heating and cooling systems.

Biancardi, F.R.; Meader, M.D. Melikian, G.; Landerman, A.M.; Hall, J.B.

1977-03-01T23:59:59.000Z

48

Geothermal: Sponsored by OSTI -- Simulation of Air-Cooled Organic...  

Office of Scientific and Technical Information (OSTI)

Simulation of Air-Cooled Organic Rankine Cycle Geo Geothermal Technologies Legacy Collection HelpFAQ | Site Map | Contact Us | Admin Log On HomeBasic Search About Publications...

49

Comparison of the Organic Flash Cycle (OFC) to other advanced ...  

Comparison of the Organic Flash Cycle (OFC) to other advanced vapor cycles for intermediate and high temperature waste heat reclamation and solar thermal

50

Expeditious Data Center Sustainability, Flow, and Temperature Modeling: Life-Cycle Exergy Consumption Combined with a Potential Flow Based, Rankine Vortex Superposed, Predictive Method  

E-Print Network (OSTI)

strategy bypasses the vapor- compression cycle of the CRACis based on the same vapor-compression refrigeration cycle4.1, which shows the vapor-compression refrig- eration cycle

Lettieri, David

2012-01-01T23:59:59.000Z

51

Study of Supercritical Carbon Dioxide Power Cycle for Low Grade Heat Conversion  

Science Conference Proceedings (OSTI)

Research on supercritical carbon dioxide power cycles has been mainly focused on high temperature applications, such as Brayton cycle in a nuclear power plant. This paper conducts a comprehensive study on the feasibility of a CO2-based supercritical power cycle for low-grade heat conversion. Energy and exergy analyses of the cycle were conducted to discuss the obstacles as well as the potentials of using supercritical carbon dioxide as the working fluid for supercritical Rankine cycle, Carbon dioxide has desirable qualities such as low critical temperature, stability, little environmental impact and low cost. However, the low critical temperature might be a disadvantage for the condensation process. Comparison between a carbon dioxide-based supercritical Rankine cycle and an organic fluid-based supercritical Rankine cycle showed that the former needs higher pressure to achieve the same efficiency and a heat recovery system is necessary to desuperheat the turbine exhaust and pre-heat the pressure charged liquid.

Vidhi, Rachana [University of South Florida, Tampa; Goswami, Yogi D. [University of South Florida, Tampa; Chen, Huijuan [University of South Florida, Tampa; Stefanakos, Elias [University of South Florida, Tampa; Kuravi, Sarada [University of South Florida, Tampa; Sabau, Adrian S [ORNL

2011-01-01T23:59:59.000Z

52

Overview of active solar absorption/Rankine cooling program  

DOE Green Energy (OSTI)

The individual absorption and Rankine projects are identified, along with the main features and accomplishments/status of each and future plans. Included are four projects funded by SOLERAS, a joint US/Saudi Arabian effort. In the absorption program, there are three active component development projects, four systems field test projects, one advanced fluid study project and one advanced cycle study project currently funded by DOE. In the Rankine program, there are five active component development projects, two system field test projects, and one advanced study project. (LEW)

Wahlig, M.; Heitz, A.; Angerman, H.; Glas, R.; Warren, M.

1981-07-01T23:59:59.000Z

53

Design, construction and commissioning of an Organic Rankine Cycle waste heat recovery system with a Tesla-hybrid turbine expander.  

E-Print Network (OSTI)

??Issues surrounding energy are some of the most compelling subjects in the world today. With human's ever increasing need for energy, production must increase or… (more)

Cirincione, Nicholas

2011-01-01T23:59:59.000Z

54

Rankine cycle energy conversion system design considerations for low and intermediate temperature sensible heat sources. Geothermal, waste heat, and solar thermal conversion  

DOE Green Energy (OSTI)

Design considerations are described for energy conversion systems for low and intermediate temperature sensible heat sources such as found in geothermal, waste heat, and solar-thermal applications. It is concluded that the most cost effective designs for the applications studied did not require the most efficient thermodynamic cycle, but that the efficiency of the energy conversion hardware can be a key factor.

Abbin, J.P. Jr.

1976-10-01T23:59:59.000Z

55

Thermal and hydraulic performance tests of a sieve-tray direct-contact heat exchanger vaporizing pure and mixed-hydrocarbon Rankine-cycle working fluids  

DOE Green Energy (OSTI)

Experiments investigating a sieve-tray direct-contact heat exchanger were conducted at the Raft River Geothermal Test Site in southeastern Idaho using the 60-kW Mobile Heat Cycle Research Facility operating in the thermal loop mode (without a turbine). Isobutane, propane, and several hydrocarbon mixtures were heated and boiled in the direct-contact column, which is approx. 12 in. in diameter and 19-1/2 ft. high, using the energy from a 280/sup 0/F geothermal resource. Using pure fluids, isobutane or propane, the column operated much as intended, with 17 trays used for preheating and one or two accomplishing the boiling. For the pure fluids, individual tray efficiencies were found to be 70% or higher for preheating, and close to 100% for boiling; column pinch points were projected to be well under 1/sup 0/F with some runs reaching values as low as approx. 0.02/sup 0/F. Maximum geofluid throughputs for the isobutane tests corresponded roughly to the terminal rise velocity of a 1/32 in. working fluid droplet in geofluid. Boiling was found to occur in as many as 12 trays for the mixtures having the highest concentrations of the minor component, with overall efficiencies in the boiling section estimated on the order of 25 or 30%. Preheating tray efficiencies appeared to be fairly independent of working fluid, with pinch points ranging from as low as approx. 0.03/sup 0/F for a 0.95 isobutane/0.05 hexane mixture to approx. 2.3/sup 0/F for a 0.85 isobutane/0.05 hexane mixture. Column operation was noticeably less stable for the mixtures than for the pure fluids, with maximum throughputs dropping to as low as 40 to 50% of those for the pure fluids.

Mines, G.L.; Demuth, O.J.; Wiggins, D.J.

1983-08-01T23:59:59.000Z

56

THE TRANSPOSED CRITICAL TEMPERATURE RANKINE THERMODYNAMIC CYCLE  

E-Print Network (OSTI)

to a forced draft wet cooling tower. All major parasiticpinch points and cooling tower approach temperatureP @ Pinch point AT Q Cooling tower T Condensing T point AT 0

Pope, William L.

2012-01-01T23:59:59.000Z

57

THE TRANSPOSED CRITICAL TEMPERATURE RANKINE THERMODYNAMIC CYCLE  

E-Print Network (OSTI)

upward for nixtures of n-butane and n-pentane, whereasand iie Table 11 I so butane Propane Isopentane @-factor (Fe

Pope, William L.

2012-01-01T23:59:59.000Z

58

THE TRANSPOSED CRITICAL TEMPERATURE RANKINE THERMODYNAMIC CYCLE  

E-Print Network (OSTI)

Pines, "Program GEOTHM, a Thermodynamic Process Program forand R. L. Fulton, "The Thermodynamic and Cost Benefits of aof Elec- tric Power, Thermodynamic and Economic Design

Pope, William L.

2012-01-01T23:59:59.000Z

59

Rankine-Brayton engine powered solar thermal aircraft  

SciTech Connect

A solar thermal powered aircraft powered by heat energy from the sun. A Rankine-Brayton hybrid cycle heat engine is carried by the aircraft body for producing power for a propulsion mechanism, such as a propeller or other mechanism for enabling sustained free flight. The Rankine-Brayton engine has a thermal battery, preferably containing a lithium-hydride and lithium mixture, operably connected to it so that heat is supplied from the thermal battery to a working fluid. A solar concentrator, such as reflective parabolic trough, is movably connected to an optically transparent section of the aircraft body for receiving and concentrating solar energy from within the aircraft. Concentrated solar energy is collected by a heat collection and transport conduit, and heat transported to the thermal battery. A solar tracker includes a heliostat for determining optimal alignment with the sun, and a drive motor actuating the solar concentrator into optimal alignment with the sun based on a determination by the heliostat.

Bennett, Charles L. (Livermore, CA)

2009-12-29T23:59:59.000Z

60

Proceedings: Second International Conference on the Interaction of Organics and Organic Cycle Treatment Chemicals with Water, Steam and Materials  

Science Conference Proceedings (OSTI)

The current worldwide suite of cycle chemistry guidelines contains little information on the presence of organics in the cycle. In addition, the guidelines do not advocate the use of organic additives during operation or shutdown. This second international conference was organized to continue the discussion initiated at the first international conference on all aspects of organics in power plants.

2010-03-30T23:59:59.000Z

Note: This page contains sample records for the topic "organic rankine cycle" 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

Proceedings: International Conference on the Interaction of Organics and Organic Cycle Treatment Chemicals with Water, Steam, and Ma terials  

Science Conference Proceedings (OSTI)

The current worldwide suite of cycle chemistry guidelines contains little information on the presence of organics in the cycle. The guidelines also do not advocate the use of organic additives during operation or shutdown. This international conference was organized in order to provide a forum for discussion on all aspects of organics in power plants.

2006-08-30T23:59:59.000Z

62

Modular Trough Power Plant Cycle and Systems Analysis  

DOE Green Energy (OSTI)

This report summarizes an analysis to reduce the cost of power production from modular concentrating solar power plants through a relatively new and exciting concept that merges two mature technologies to produce distributed modular electric power in the range of 500 to 1,500 kWe. These are the organic Rankine cycle (ORC) power plant and the concentrating solar parabolic (CSP) trough technologies that have been developed independent of each other over many years.

Price, H.; Hassani, V.

2002-01-01T23:59:59.000Z

63

Overview-absorption/Rankine solar cooling program  

DOE Green Energy (OSTI)

The tasks being performed in the absorption and Rankine program areas run the gamut from basic work on fluids to development of chillers and chiller components, to field and reliability testing of complete cooling systems. In the absorption program, there are six current and five essentially completed projects. In the Rankine program, there are five current projects directly supported by DOE, and three projects funded through and managed by NASA/MSFC (Manned Space Flight Center, Huntsville, Alabama). The basic features of these projects are discussed. The systems under development in five of these current projects have been selected for field testing in the new SOLERAS program, a joint US-Saudi Arabian enterprise. Some technical highlights of the program are presented.

Wahlig, M.; Heitz, A.; Boyce, B.

1980-03-01T23:59:59.000Z

64

A review of test results on parabolic dish solar thermal power modules with dish-mounted rankine engines and for production of process steam  

SciTech Connect

This paper presents results of development testing of various solar thermal parabolic dish modules and assemblies. Most of the tests were at modules and assemblies that used a dish-mounted, organic Rankine cycle turbine for production of electric power. Some tests were also run on equipment for production of process steam or for production of electricity using dish-mounted reciprocating steam engines. These tests indicate that early modules achieve efficiencies of about 18 percent in converting sunlight to electricity (excluding the inverter but including parasitics). A number of malfunctions occurred. The performance measurements, as well as the malfunctions and other operating experience, provided information that should be of value in developing systems with improved performance and reduced maintenance.

Jaffe, L.D.

1988-11-01T23:59:59.000Z

65

Combined-cycle solarised gas turbine with steam, organic and CO2 bottoming cycles  

E-Print Network (OSTI)

combined-cycle systems have been performed. Dersch et al, 2004 [2] studied how parabolic troughs could the other part. That approach is relevant for trough systems, but not appropriate in the case of point been used with solar ponds in Israel [5] and low-temperature parabolic

66

Rankin, Pennsylvania: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

form form View source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit with form History Facebook icon Twitter icon » Rankin, Pennsylvania: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 40.412569°, -79.879216° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":40.412569,"lon":-79.879216,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

67

Staging Rankine Cycles Using Ammonia for OTEC Power Production  

DOE Green Energy (OSTI)

Recent focus on renewable power production has renewed interest in looking into ocean thermal energy conversion (OTEC) systems. Early studies in OTEC applicability indicate that the island of Hawaii offers a potential market for a nominal 40-MWe system. a 40-MWe system represents a large leap in the current state of OTEC technology. Lockheed Martin Inc. is currently pursuing a more realistic goal of developing a 10-MWe system under U.S. Navy funding (Lockheed 2009). It is essential that the potential risks associated with the first-of-its-kind plant should be minimized for the project's success. Every means for reducing costs must also be pursued without increasing risks. With this in mind, the potential for increasing return on the investment is assessed both in terms of effective use of the seawater resource and of reducing equipment costs.

Bharathan, D.

2011-03-01T23:59:59.000Z

68

Staging Rankine Cycles Using Ammonia for OTEC Power Production  

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

powers with the number of stages ... 9 Figure 7 Variation of heat exchanger (UA) product requirements with the number of stages ..... 10 List of Tables...

69

RANKINE CYCLE WASTE HEAT RECOVERY SYSTEM - Energy Innovation Portal  

This disclosure relates to a waste heat recovery (WHR) system and to a system and method for regulation of a fluid inventory in a condenser and a receiver of a ...

70

Overview of recent supercritical binary geothermal cycle experiments from the Heat Cycle Research Program  

DOE Green Energy (OSTI)

The Heat Cycle Research Program, which is being conducted for the Department of Energy, has as its objective the development of the technology for effecting improved utilization of moderate temperature geothermal resources. Testing at the Heat Cycle Research Facility located at the DOE Geothermal Test Facility East Mesa, California involves supercritical vaporization and counterflow in-tube condensing in an organic Rankine cycle. Results of the experiments are given for both pure and mixed-hydrocarbon working fluids. The heater and condenser behavior predicted by the Heat Transfer Research, Inc. computer codes used for correlation of the data was in excellent agreement with experimental results. A special series of tests, conducted with propane and up to approximately 40% isopentane concentration, indicated that a close approach to ''integral'' condensation was occurring in the vertically-oriented condenser. Preliminary results of tests in which the turbine expansion ''passed through the two-phase region'' did not indicate efficiency degradation assignable to these metastable expansion processes.

Demuth, O.J.; Bliem, C.J.; Mines, G.L.; Swank, W.D.

1986-01-01T23:59:59.000Z

71

A combined power and ejector refrigeration cycle for low temperature heat sources  

Science Conference Proceedings (OSTI)

A combined power and ejector refrigeration cycle for low temperature heat sources is under investigation in this paper. The proposed cycle combines the organic Rankine cycle and the ejector refrigeration cycle. The ejector is driven by the exhausts from the turbine to produce power and refrigeration simultaneously. A simulation was carried out to analyze the cycle performance using R245fa as the working fluid. A thermal efficiency of 34.1%, an effective efficiency of 18.7% and an exergy efficiency of 56.8% can be obtained at a generating temperature of 395 K, a condensing temperature of 298 K and an evaporating temperature of 280 K. Simulation results show that the proposed cycle has a big potential to produce refrigeration and most exergy losses take place in the ejector. (author)

Zheng, B.; Weng, Y.W. [School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240 (China)

2010-05-15T23:59:59.000Z

72

Role of organic soils in the world carbon cycle: problem analysis and research needs  

SciTech Connect

In May 1979, The Institute of Ecology held a workshop to determine the role of organic soils in the global carbon cycle and to ascertain their past, present and future significance in world carbon flux. Wetlands ecologists and soil scientists who participated in the workshop examined such topics as Soils as Sources of Atmospheric CO/sub 2/, Organic Soils, Primary Production and Growth of Wetlands Ecosystems, and Management of Peatlands. The major finding of the workshop is that the organic soils are important in the overall carbon budget. Histosols and Gleysols, the major organic soil deposits of the world, normally sequester organic carbon fixed by plants. They may now be releasing enough carbon to account for nearly 10% of the annual rise in atmospheric content of CO/sub 2/.

Armentano, T.V. (ed.)

1980-02-01T23:59:59.000Z

73

Chemistry of organic carbon in soil with relationship to the global carbon cycle  

SciTech Connect

Various ecosystem disturbances alter the balances between production of organic matter and its decomposition and therefore change the amount of carbon in soil. The most severe perturbation is conversion of natural vegetation to cultivated crops. Conversion of natural vegetation to cultivated crops results in a lowered input of slowly decomposing material which causes a reduction in overall carbon levels. Disruption of soil matrix structure by cultivation leads to lowered physical protection of organic matter resulting in an increased net mineralization rate of soil carbon. Climate change is another perturbation that affects the amount and composition of plant production, litter inputs, and decomposition regimes but does not affect soil structure directly. Nevertheless, large changes in soil carbon storage are probable with anticipated CO2 induced climate change, particularly in northern latitudes where anticipated climate change will be greatest (MacCracken and Luther 1985) and large amounts of soil organic matter are found. It is impossible, given the current state of knowledge of soil organic matter processes and transformations to develop detailed process models of soil carbon dynamics. Largely phenomenological models appear to be developing into predictive tools for understanding the role of soil organic matter in the global carbon cycle. In particular, these models will be useful in quantifying soil carbon changes due to human land-use and to anticipated global climate and vegetation changes. 47 refs., 7 figs., 2 tabs.

Post, W.M. III

1988-01-01T23:59:59.000Z

74

Rankin County, Mississippi: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

Rankin County, Mississippi: Energy Resources Rankin County, Mississippi: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 32.2653668°, -89.9253233° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":32.2653668,"lon":-89.9253233,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

75

New Kalina cycle promises more efficient cogeneration  

SciTech Connect

The Kalina cycle improves upon the Rankine cycle by adding a distillation phase. This is necessary because the process employs two fluids to make steam-ammonia and water. Use of two fluids is not a new idea, but the Kalina cycle works both components to their optimal extent because of the innovative distillation step. Prior to boiling, an ammonia/water (30/70) solution is raised to an intermediate pressure before entering the distillation subsystem. Here, two streams are created: one, half ammonia, half water; the other, mainly water. The ammonia/based stream is vaporized in the boiler, further raising the pressure, and is expanded through the turbine. It then rejoins the pressurized water stream, where it is condensed-completing the cycle. The Kalina cycle claims higher efficiencies than the Rankine because: less fuel is required to make steam; more pressure is achieved to turn the turbine; less pressure is needed for condensation.

1985-09-01T23:59:59.000Z

76

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

E-Print Network (OSTI)

c,e Low-Intermediate Gas turbine exhaust, boiler exhaust,cycles for micro-gas turbines," Applied Thermal Engineering,Tiba, "Optimization of gas-turbine combined cycles for solar

Ho, Tony

2012-01-01T23:59:59.000Z

77

Technology Development Program for an Advanced Potassium Rankine Power Conversion System Compatible with Several Space Reactor Designs  

SciTech Connect

This report documents the work performed during the first phase of the National Aeronautics and Space Administration (NASA), National Research Announcement (NRA) Technology Development Program for an Advanced Potassium Rankine Power Conversion System Compatible with Several Space Reactor Designs. The document includes an optimization of both 100-kW{sub e} and 250-kW{sub e} (at the propulsion unit) Rankine cycle power conversion systems. In order to perform the mass optimization of these systems, several parametric evaluations of different design options were investigated. These options included feed and reheat, vapor superheat levels entering the turbine, three different material types, and multiple heat rejection system designs. The overall masses of these Nb-1%Zr systems are approximately 3100 kg and 6300 kg for the 100- kW{sub e} and 250-kW{sub e} systems, respectively, each with two totally redundant power conversion units, including the mass of the single reactor and shield. Initial conceptual designs for each of the components were developed in order to estimate component masses. In addition, an overall system concept was presented that was designed to fit within the launch envelope of a heavy lift vehicle. A technology development plan is presented in the report that describes the major efforts that are required to reach a technology readiness level of 6. A 10-year development plan was proposed.

Yoder, G.L.

2005-10-03T23:59:59.000Z

78

Combined cycle and waste heat recovery power systems based on a novel thermodynamic energy cycle utilizing low-temperature heat for power generation  

SciTech Connect

A new thermodynamic energy cycle has been developed, using a multicomponent working agent. Condensation is supplemented with absorption, following expansion in the turbine. Several combined power systems based on this cycle have been designed and cost-estimated. Efficiencies of these new systems are 1.35 to 1.5 times higher than the best Rankine Cycle system, at the same border conditions. Investment cost per unit of power output is about two-thirds of the cost of a comparable Rankine Cycle system. Results make cogeneration economically attractive at current energy prices. The first experimental installation is planned by Fayette Manufacturing Company and Detroit Diesel Allison Division of General Motors.

Kalina, A.I.

1983-01-01T23:59:59.000Z

79

Study of practical cycles for geothermal power plants. Final report  

SciTech Connect

A comparison is made of the performance and cost of geothermal power cycles designed specifically, utilizing existing technology, to exploit the high temperature, high salinity resource at Niland and the moderate temperature, moderately saline resource at East Mesa in California's Imperial Valley. Only two kinds of cycles are considered in the analysis. Both employ a dual flash arrangement and the liberated steam is either utilized directly in a condensing steam turbine or used to heat a secondary working fluid in a closed Rankine (binary) cycle. The performance of several organic fluids was investigated for the closed cycle and the most promising were selected for detailed analysis with the given resource conditions. Results show for the temperature range investigated that if the noncondensible gas content in the brine is low, a dual flash condensing steam turbine cycle is potentially better in terms of resource utilization than a dual flash binary cycle. (The reverse is shown to be true when the brine is utilized directly for heat exchange.) It is also shown that despite the higher resource temperature, the performance of the dual flash binary cycle at Niland is degraded appreciably by the high salinity and its output per unit of brine flow is almost 20 percent lower than that of the steam turbine cycle at East Mesa. Turbine designs were formulated and costs established for power plants having a nominal generating capacity of 50 MW. Three cycles were analyzed in detail. At East Mesa a steam turbine and a binary cycle were compared. At Niland only the binary cycle was analyzed since the high CO/sub 2/ content in the brine precludes the use of a steam turbine there. In each case only the power island equipment was considered and well costs and the cost of flash separators, steam scrubbers and piping to the power plant boundary were excluded from the estimate.

Eskesen, J.H.

1977-04-01T23:59:59.000Z

80

Study of practical cycles for geothermal power plants. Final report  

DOE Green Energy (OSTI)

A comparison is made of the performance and cost of geothermal power cycles designed specifically, utilizing existing technology, to exploit the high temperature, high salinity resource at Niland and the moderate temperature, moderately saline resource at East Mesa in California's Imperial Valley. Only two kinds of cycles are considered in the analysis. Both employ a dual flash arrangement and the liberated steam is either utilized directly in a condensing steam turbine or used to heat a secondary working fluid in a closed Rankine (binary) cycle. The performance of several organic fluids was investigated for the closed cycle and the most promising were selected for detailed analysis with the given resource conditions. Results show for the temperature range investigated that if the noncondensible gas content in the brine is low, a dual flash condensing steam turbine cycle is potentially better in terms of resource utilization than a dual flash binary cycle. (The reverse is shown to be true when the brine is utilized directly for heat exchange.) It is also shown that despite the higher resource temperature, the performance of the dual flash binary cycle at Niland is degraded appreciably by the high salinity and its output per unit of brine flow is almost 20 percent lower than that of the steam turbine cycle at East Mesa. Turbine designs were formulated and costs established for power plants having a nominal generating capacity of 50 MW. Three cycles were analyzed in detail. At East Mesa a steam turbine and a binary cycle were compared. At Niland only the binary cycle was analyzed since the high CO/sub 2/ content in the brine precludes the use of a steam turbine there. In each case only the power island equipment was considered and well costs and the cost of flash separators, steam scrubbers and piping to the power plant boundary were excluded from the estimate.

Eskesen, J.H.

1977-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "organic rankine cycle" 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

Organic Carbon Cycling in East China Sea Shelf Sediments: Linkages with Hypoxia  

E-Print Network (OSTI)

The Changjiang River provides the main source of sediment and terrestrial derived organic carbon (OC) to the Changjiang large delta-front estuary (LDE) in the East China Sea (ECS). This study analyzed bulk OC, biomarkers including lignin and plant pigment, black carbon (BC) on ECS sediments sampled in winter 2009 and 2010 in order to study the OC cycling under the influence of natural and anthropogenic disturbance. Low-oxygen tolerant foraminiferal microfossils were analyzed in another two sediment cores to study the historical hypoxia events in the Changjiang LDE. Bulk carbon to nitrogen (C/N) ratio and stable isotope ?13C in the surface sediment samples indicated a mixture source of terrestrial, deltaic and marine derived OC. Refractory BC and reworked marine OC seemed to comprise most of the OC pool with older, less reactive signatures as deduced from ?14C, and BC analyses. Winter wind/wave energy and hydrodynamic sorting had a substantial winnowing effect on surface sediment OC redistribution. As a result, the highest lignin concentration shifted to the south during the 2010 cruise after the summer flood event. In addition, algal inputs from local deltaic lakes due to eutrophication and/or lateral transport likely caused the observed lack of benthic-pelagic coupling of pigment concentrations between the surface sediments and the water column after the summer flood in 2010. For the down-core sediment, the mass accumulation rate distribution followed the dispersal pathway of the ECS sediment. Terrestrial and marine derived OC showed significant spatial and temporal distribution. Lignin rich materials were better preserved in sediments closer to the coast while offshore sediments tended to be composed of lignin-poor, degraded OC, that were likely hydrodynamically sorted to a long distance during transport. Besides eutrophication, plant pigments indicated that marine-derived OC was mostly deposited in the sediment mixed layer with decay in the underlying sediment accumulation layer. The total OC standing stock since 1900 is approximately 1.62±1.15 kgC m^-2, about 1/10 of the total OC stock in all the middle and lower lakes in the Changjiang catchment. There has been an increase in the number of hypoxic bottom water events on the Changjiang LDE over the past 60 yrs indicated from the increases in low-oxygen tolerant foraminiferal microfossils due to excess deposition of OC and summer stratification.

Li, Xinxin

2013-05-01T23:59:59.000Z

82

Working Fluids for ORC Processes  

Science Conference Proceedings (OSTI)

... is desirable. Vapor turbine Rankine cycle processes are used for the generation of electricity from fossil fuel. An Organic ...

2006-07-20T23:59:59.000Z

83

INTEGRATED PYROLYSIS COMBINED CYCLE BIOMASS POWER SYSTEM CONCEPT DEFINITION  

DOE Green Energy (OSTI)

Advanced power systems based on integrated gasification/combined cycles (IGCC) are often presented as a solution to the present shortcomings of biomass as fuel. Although IGCC has been technically demonstrated at full scale, it has not been adopted for commercial power generation. Part of the reason for this situation is the continuing low price for coal. However, another significant barrier to IGCC is the high level of integration of this technology: the gas output from the gasifier must be perfectly matched to the energy demand of the gas turbine cycle. We are developing an alternative to IGCC for biomass power: the integrated (fast) pyrolysis/ combined cycle (IPCC). In this system solid biomass is converted into liquid rather than gaseous fuel. This liquid fuel, called bio-oil, is a mixture of oxygenated organic compounds and water that serves as fuel for a gas turbine topping cycle. Waste heat from the gas turbine provides thermal energy to the steam turbine bottoming cycle. Advantages of the biomass-fueled IPCC system include: combined cycle efficiency exceeding 37 percent efficiency for a system as small as 7.6 MW{sub e}; absence of high pressure thermal reactors; decoupling of fuel processing and power generation; and opportunities for recovering value-added products from the bio-oil. This report provides a technical overview of the system including pyrolyzer design, fuel clean-up strategies, pyrolysate condenser design, opportunities for recovering pyrolysis byproducts, gas turbine cycle design, and Rankine steam cycle. The report also reviews the potential biomass fuel supply in Iowa, provide and economic analysis, and present a summery of benefits from the proposed system.

Eric Sandvig; Gary Walling; Robert C. Brown; Ryan Pletka; Desmond Radlein; Warren Johnson

2003-03-01T23:59:59.000Z

84

Performance limits of power cycles using low temperature heat sources  

Science Conference Proceedings (OSTI)

A systematic analysis of a Rankine cycle using R134a as the working fluid and a finite (314.5 kg/s) low temperature (100 °C) heat source shows that, for any fixed net power output, the evaporation pressure has upper and lower limits which depend ... Keywords: energy analysis, exergy analysis, finite size thermodynamics, optimisation

Mohammed Khennich; Nicolas Galanis

2010-02-01T23:59:59.000Z

85

Chemical characterization of dissolved organic matter (DOM) in seawater : structure, cycling, and the role of biology  

E-Print Network (OSTI)

The goal of this thesis is to investigate three different areas relating to the characterization of dissolved organic matter (DOM): further determination of the chemical compounds present in high molecular weight DOM ...

Quan, Tracy M. (Tracy Michelle), 1977-

2005-01-01T23:59:59.000Z

86

Microtubule organization requires cell cycle-dependent nucleation at dispersed cytoplasmic sites: Polar and perinuclear microtubule organizing centers in the plant pathogen Ustilago maydis  

E-Print Network (OSTI)

Growth of most eukaryotic cells requires directed transport along microtubules (MTs) that are nucleated at nuclear-associated microtubule organizing centers (MTOCs), such as the centrosome and the fungal spindle pole body (SPB). Herein, we show that the pathogenic fungus Ustilago maydis uses different MT nucleation sites to rearrange MTs during the cell cycle. In vivo observation of green fluorescent protein-MTs and MT plus-ends, tagged by a fluorescent EB1 homologue, provided evidence for antipolar MT orientation and dispersed cytoplasmic MT nucleating centers in unbudded cells. On budding ?-tubulin containing MTOCs formed at the bud neck, and MTs reorganized with ?85 % of all minus-ends being focused toward the growth region. Experimentally induced lateral budding resulted in MTs that curved out of the bud, again supporting the notion that polar growth requires polar MT nucleation. Depletion or overexpression of Tub2, the ?-tubulin from U. maydis, affected MT number in interphase cells. The SPB was inactive in G2 phase but continuously recruited ?-tubulin until it started to nucleate mitotic MTs. Taken together, our data suggest that MT reorganization in U. maydis depends on cell cycle-specific nucleation at dispersed cytoplasmic sites, at a polar MTOC and the SPB.

Anne Straube; Marianne Brill; Berl R. Oakley; Tetsuya Horio; Gero Steinberg

2003-01-01T23:59:59.000Z

87

An investigation into the performance of a Rankine-heat pump combined cycle / Stephanus Phillipus Oelofse.  

E-Print Network (OSTI)

??The global growth in electricity consumption and the shortcomings of renewable electricity generation technologies are some of the reasons why it is still relevant to… (more)

Oelofse, Stephanus Phillipus

2012-01-01T23:59:59.000Z

88

APPLICATION OF TURBOMACHINERY IN SOLAR-ASSISTED RANKINE COOLING SYSTEMS  

E-Print Network (OSTI)

F. , jr. S. B. , S. M. Steam Turbines. Second Edition, Tenththe solar-assisted cycle. Steam turbines have been used forin Figure 5. Steam entering the turbine expends a portion of

Leech, J.

2010-01-01T23:59:59.000Z

89

Supercritical binary geothermal cycle experiments with mixed-hydrocarbon working fluids and a vertical, in-tube, counterflow condenser  

DOE Green Energy (OSTI)

The objective is improved utilization of moderate temperature geothermal resources. Current testing involves supercritical vaporization and counterflow in-tube condensing in an organic Rankine cycle. This report presents a description of the test facility and results from a part of the program in which the condenser was oriented in a vertical attitude. Results of the experiments for the supercritical heaters and the countercurrent, vertical, in-tube condenser are given for both pure and mixed-hydrocarbon working fluids. The heater and condenser behavior predicted by the Heat Transfer Research, Inc. computer codes used for correlation of the data was in excellent agreement with experimental results. A special series of tests, conducted with propane and up to approximately 40% isopentane concentration, indicated that a close approach to ''integral'' condensation was occurring in the vertically-oriented condenser.

Demuth, O.J.; Bliem, C.J.; Mines, G.L.; Swank, W.D.

1985-12-01T23:59:59.000Z

90

Thermodynamic cycle design of a Brayton–Rankine combined cycle for a pebble bed modular reactor / Cornelius Petrus Kloppers.  

E-Print Network (OSTI)

??The rapid development in nuclear technology worldwide has created the need for an efficient power conversion unit to extract the energy from the new generation… (more)

Kloppers, Cornelius Petrus

2011-01-01T23:59:59.000Z

91

Program on Technology Innovation: Modified Brayton Cycle for Use in Coal-Fired Power Plants  

Science Conference Proceedings (OSTI)

A modified closed Brayton cycle using supercritical carbon dioxide (SCO2) as the working fluid is being proposed for a number of power generation applications. The technology offers the prospect of increased plant efficiency and reduced plant cost. This report compares candidate closed Brayton cycle performance with advanced ultra-supercritical steam-Rankine cycle performance.BackgroundIncreasing the efficiency of coal-fired steam-electric power ...

2013-02-14T23:59:59.000Z

92

Symmetries of Discontinuous Flows and the Dual Rankine-Hugoniot Conditions in Fluid Dynamics  

E-Print Network (OSTI)

It has recently been shown that the maximal kinematical invariance group of polytropic fluids, for smooth subsonic flows, is the semidirect product of SL(2,R) and the static Galilei group G. This result purports to offer a theoretical explanation for an intriguing similarity, that was recently observed, between a supernova explosion and a plasma implosion. In this paper we extend this result to discuss the symmetries of discontinuous flows, which further validates the explanation by taking into account shock waves, which are the driving force behind both the explosion and implosion. This is accomplished by constructing a new set of Rankine-Hugoniot conditions, which follow from Noether's conservation laws. The new set is dual to the standard Rankine-Hugoniot conditions and is related to them through the SL(2,R) transformations. The entropy condition, that the shock needs to satisfy for physical reasons, is also seen to remain invariant under the transformations.

Oliver Jahn; V. V. Sreedhar; Amitabh Virmani

2004-07-26T23:59:59.000Z

93

Emergence of Fusion/Fission Cycling and Self-Organized Criticality from a Simulation Model of Early Complex Polities  

E-Print Network (OSTI)

H. 1999, Chiefdoms and the Fission-Fusion Process, AmericanEmergence of Fusion/Fission Cycling and Self-Organizedthe fusion and subsequent fission of dynamic political

Griffin, Arthur F

2011-01-01T23:59:59.000Z

94

Novel and Innovative Power Cycles: A Preliminary Assessment  

Science Conference Proceedings (OSTI)

Thermal-electric power plants employing steam-Rankine and combustion turbine power cycles are the predominant method of supplying electric power worldwide and will continue to be for the foreseeable future. Three factors drive research and development of technologies for use in fossil fueled electric power plants in the 21st century—higher efficiency, near-zero emissions, and decreased CO2 emissions. This report assesses a selection of novel thermal-electric power ...

2013-12-01T23:59:59.000Z

95

Organization of Energetic Particles by the Solar Wind Structure During the Declining to Minimum Phase of Solar Cycle 23  

E-Print Network (OSTI)

the longitude distribution of solar energetic particles. J.shocks in deter- mining solar energetic particle abundances.J.E. , Dwyer, J.R. : 2006a, Solar cycle variations in the

2010-01-01T23:59:59.000Z

96

Preliminary design package for residential heating/cooling system--Rankine air conditioner redesign  

DOE Green Energy (OSTI)

This report contains a summary of the preliminary redesign and development of a marketable single-family heating and cooling system. The objectives discussed are the interim design and schedule status of the Residential (3-ton) redesign, problem areas and solutions, and the definition of plans for future design and development activities. The proposed system for a single-family residential heating and cooling system is a single-loop, solar-assisted, hydronic-to-warm-air heating subsystem with solar-assisted domestic water heating and a Rankine-driven expansion air-conditioning subsystem.

Not Available

1978-12-01T23:59:59.000Z

97

Advanced heat pump for the recovery of volatile organic compounds. Phase 1, Conceptual design of an advanced Brayton cycle heat pump for the recovery of volatile organic compounds: Final report  

Science Conference Proceedings (OSTI)

Emissions of Volatile Organic Compounds (VOC) from stationary industrial and commercial sources represent a substantial portion of the total US VOC emissions. The ``Toxic-Release Inventory`` of The US Environmental Protection Agency estimates this to be at about 3 billion pounds per year (1987 estimates). The majority of these VOC emissions are from coating processes, cleaning processes, polymer production, fuel production and distribution, foam blowing,refrigerant production, and wood products production. The US Department of Energy`s (DOE) interest in the recovery of VOC stems from the energy embodied in the recovered solvents and the energy required to dispose of them in an environmentally acceptable manner. This Phase I report documents 3M`s work in close working relationship with its subcontractor Nuclear Consulting Services (Nucon) for the preliminary conceptual design of an advanced Brayton cycle heat pump for the recovery of VOC. Nucon designed Brayton cycle heat pump for the recovery of methyl ethyl ketone and toluene from coating operations at 3M Weatherford, OK, was used as a base line for the work under cooperative agreement between 3M and ODE. See appendix A and reference (4) by Kovach of Nucon. This cooperative agreement report evaluates and compares an advanced Brayton cycle heat pump for solvent recovery with other competing technologies for solvent recovery and reuse. This advanced Brayton cycle heat pump is simple (very few components), highly reliable (off the shelf components), energy efficient and economically priced.

Not Available

1992-03-01T23:59:59.000Z

98

Utility-scale combined-cycle power systems with Kalina bottoming cycles  

SciTech Connect

A new power-generation technology, often referred to as the Kalina cycle, is being developed as a direct replacement for the Rankine steam cycle. It can be applied to any thermal heat source, low or high temperature. Among several Kalina cycle variations, there is one that is particularly well suited as a bottoming cycle for utility combined-cycle applications. It is the subject of this paper. Using an ammonia/water mixture as the working fluid and a condensing system based on absorption-refrigeration principles, the Kalina bottoming cycle outperforms a triple-pressure steam cycle by 16%. Additionally, this version of the Kalina cycle is characterized by an intercooling feature between turbine stages, diametrically opposite to normal reheating practice in steam plants. Energy and mass balances are presented for a 200-MW(electric) Kalina bottoming cycle. Kalina cycle performance is compared to a triple-pressure steam plant. Energy and mass balances are presented as well for a 200-MW(electric) Kalina direct-fired cycle designed for utility purposes.

Kalina, A.I.

1987-01-01T23:59:59.000Z

99

Modeling of a second-generation solar-driven Rankine air conditioner. Final report  

DOE Green Energy (OSTI)

Ten configurations of a second-generation (2G), solar-powered, Rankine-driven air conditioner were simulated and the data presented for use in companion studies. The results of the analysis show that the boiling-in-collector (BIC) configuration generates more power per collector area than the other configurations. The models used to simulate the configuration are presented in this report. The generated data are also presented. Experimental work was done under this study to both improve a novel refrigerant and oil lubrication system for the centrifugal compressor and investigate the aerodynamic unloading characteristics of the centrifugal compressor. The information generated was used to define possible turbo-gearbox configurations for use in the second generation computer simulation.

Denius, M.W.; Batton, W.D.

1984-07-01T23:59:59.000Z

100

AUTOMATED SOLAR FLARE STATISTICS IN SOFT X-RAYS OVER 37 YEARS OF GOES OBSERVATIONS: THE INVARIANCE OF SELF-ORGANIZED CRITICALITY DURING THREE SOLAR CYCLES  

SciTech Connect

We analyzed the soft X-ray light curves from the Geostationary Operational Environmental Satellites over the last 37 years (1975-2011) and measured with an automated flare detection algorithm over 300,000 solar flare events (amounting to Almost-Equal-To 5 times higher sensitivity than the NOAA flare catalog). We find a power-law slope of {alpha}{sub F} = 1.98 {+-} 0.11 for the (background-subtracted) soft X-ray peak fluxes that is invariant through three solar cycles and agrees with the theoretical prediction {alpha}{sub F} = 2.0 of the fractal-diffusive self-organized criticality (FD-SOC) model. For the soft X-ray flare rise times, we find a power-law slope of {alpha}{sub T} = 2.02 {+-} 0.04 during solar cycle minima years, which is also consistent with the prediction {alpha}{sub T} = 2.0 of the FD-SOC model. During solar cycle maxima years, the power-law slope is steeper in the range of {alpha}{sub T} Almost-Equal-To 2.0-5.0, which can be modeled by a solar-cycle-dependent flare pile-up bias effect. These results corroborate the FD-SOC model, which predicts a power-law slope of {alpha}{sub E} = 1.5 for flare energies and thus rules out significant nanoflare heating. While the FD-SOC model predicts the probability distribution functions of spatio-temporal scaling laws of nonlinear energy dissipation processes, additional physical models are needed to derive the scaling laws between the geometric SOC parameters and the observed emissivity in different wavelength regimes, as we derive here for soft X-ray emission. The FD-SOC model also yields statistical probabilities for solar flare forecasting.

Aschwanden, Markus J.; Freeland, Samuel L., E-mail: aschwanden@lmsal.com [Lockheed Martin Advanced Technology Center, Solar and Astrophysics Laboratory, Org. ADBS, Building 252, 3251 Hanover Street, Palo Alto, CA 94304 (United States)

2012-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "organic rankine cycle" 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

Organization  

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

Organization Print Organization Print 2012-12 org chart A complete ALS organization chart (June 2013) is available in PDF. Appointed and elected members of advisory panels provide guidance to Berkeley Lab and ALS management in developing the ALS scientific and user programs. ALS Staff Photo staff photo thumb Click on the image to see a recent photo of ALS staff in front of the dome. The photo was taken on May 14, 2013. ALS Management and Advisory Team Steve Kevan, Deputy Division Director, Science Michael J. Banda, Deputy Division Director, Operations Robert W. Schoenlein, Senior Staff Scientist, Next Generation Light Source Initiative Janos Kirz, Scientific Advisor Paul Adams, Division Deputy for Biosciences ALS Scientific, Technical, and User Support Groups Accelerator Physics

102

The promise of the Kalina cycle  

SciTech Connect

New technologies come and go, but the Rankine steam cycle goes on forever - or so it seemed until Alexander I. Kalina found a better way. Power engineers have known for years that heat can be generated more efficiently in a boiler if a mixture like ammonia and water is used as the working fluid, but no one had figured out how to condense the working fluid mixture at normal heat rejection temperatures. Kalina solved the problem, at least in theory. Now it must be determined whether his theory holds up in practice. In the Rankine steam cycle, water is used in a boiler to produce high-pressure vapor, which is expanded through a turbine to produce power. The expanded vapor is subsequently condensed and is pumped back to the boiler in liquid form to repeat the cycle. In the Kalina cycle, a mixture of approximately 70 percent ammonia and 30 percent water is used in a boiler to produce superheated vapor. The ammonia begins to boil first, having the lower boiling point. As the ammonia boils off, the concentration of ammonia in the remaining mixture decreases, and the mixture's boiling point increases. The boiling point keeps changing as the ammonia-water ratio changes, and the fluid mixture is gradually depleted. This leads to a better match in temperature profiles and permits more energy to be transferred to the working fluid. Overall, more of the available heat is utilized in vapor production than in the steam cycle, and more vapor means more power output from the turbine-generator.

Jurgen, R.K.

1986-04-01T23:59:59.000Z

103

Novel Power Cycle for Combined-Cycle Systems and Utility Power Plants  

E-Print Network (OSTI)

The description of a new power cycle, based on the use of a multicomponent working fluid, was published earlier. A thermodynamic analysis of this cycle has demonstrated its superiority over the currently used Rankine Cycle, and a distribution of losses in the subsystems of this cycle has been established. A new, improved variant of the cycle, which provides 10% efficiency improvement over the initial variant, has been developed. The new variant employs a cooling of the working fluid between turbine stages and a recuperation of the released heat for supplementation of the boiler heat supply. Analysis shows that with this new, improved cycle efficiencies of up to 52% for a combined-cycle system employing standard turbines, and of up to 55% when modern high-temperature gas turbines are employed, can be achieved. The same cycle can be utilized to retrofit existing direct-fired power plants, providing an efficiency of up to 42%. The possible implications off such a cycle implementation are briefly discussed. The Electric Power Research Institute (EPRI) is now conducting a study of this cycle.

Kalina, A. L.

1986-06-01T23:59:59.000Z

104

Microsoft Word - INL_EXT-13-30173 simulation of air-cooled ORC...  

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

of Air-Cooled Organic Rankine Cycle Geothermal Power Plant Performance Daniel S. Wendt Gregory L. Mines September 2013 DISCLAIMER This information was prepared as an account...

105

Contributions to Key Energy Conversion Technologies and Advanced...  

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

achieve high efficiencies with reasonable emissions with both natural gas and biogas. Combination with Organic Rankine Cycle (ORC) heat recovery units as well as the...

106

Categorical Exclusion Determinations: Office of Energy Efficiency...  

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

Categorical Exclusion Determination Optimization of Hybrid-WaterAir-Cooled Condenser In an Enhanced Turbine Geothermal Organic Rankine Cycle System CX(s) Applied: B3.6,...

107

MIT-CTP-3519 Symmetries of Discontinuous Flows and the Dual Rankine-Hugoniot Conditions in Fluid Dynamics  

E-Print Network (OSTI)

It has recently been shown that the maximal kinematical invariance group of polytropic fluids, for smooth subsonic flows, is the semidirect product of SL(2, R) and the static Galilei group G. This result purports to offer a theoretical explanation for an intriguing similarity, that was recently observed, between a supernova explosion and a plasma implosion. In this paper we extend this result to discuss the symmetries of discontinuous flows, which further validates the explanation by taking into account shock waves, which are the driving force behind both the explosion and implosion. This is accomplished by constructing a new set of Rankine-Hugoniot conditions, which follow from Noether’s conservation laws. The new set is dual to the standard Rankine-Hugoniot conditions and is related to them through the SL(2, R) transformations. The entropy condition, that the shock needs to satisfy for physical reasons, is also seen to remain invariant under the transformations.

Oliver Jahn; V. V. Sreedhar; Amitabh Virmani

2004-01-01T23:59:59.000Z

108

HTGR-GT closed-cycle gas turbine: a plant concept with inherent cogeneration (power plus heat production) capability  

SciTech Connect

The high-grade sensible heat rejection characteristic of the high-temperature gas-cooled reactor-gas turbine (HTGR-GT) plant is ideally suited to cogeneration. Cogeneration in this nuclear closed-cycle plant could include (1) bottoming Rankine cycle, (2) hot water or process steam production, (3) desalination, and (4) urban and industrial district heating. This paper discusses the HTGR-GT plant thermodynamic cycles, design features, and potential applications for the cogeneration operation modes. This paper concludes that the HTGR-GT plant, which can potentially approach a 50% overall efficiency in a combined cycle mode, can significantly aid national energy goals, particularly resource conservation.

McDonald, C.F.

1980-04-01T23:59:59.000Z

109

Thermodynamic properties of ammonia-water mixtures for power cycles  

SciTech Connect

Power cycles with ammonia-water mixtures as working fluids have been shown to reach higher thermal efficiencies than the traditional steam turbine (Rankine) cycle with water as the working fluid. Different correlations for the thermodynamic properties of ammonia-water mixtures have been used in studies of ammonia-water mixture cycles described in the literature. Four of these correlations are compared in this paper. The differences in thermal efficiencies for a bottoming Kalina cycle when these four property correlations are used are in the range 0.5 to 3.3%. The properties for saturated liquid and vapor according to three of the correlations and available experimental data are also compared at high pressures and temperatures [up to 20 MPa and 337 C (610 K)]. The difference in saturation temperature for the different correlations is up to 20%, and the difference in saturation enthalpy is as high as 100% when the pressure is 20 MPa.

Thorin, E. [Royal Inst. of Technology, Stockholm (Sweden)]|[Maelardalen Univ., Vaesteraas (Sweden). Dept. of Energy; Dejfors, C.; Svedberg, G. [Royal Inst. of Technology, Stockholm (Sweden)

1998-03-01T23:59:59.000Z

110

Home composting as an alternative treatment option for organic household waste in Denmark: An environmental assessment using life cycle assessment-modelling  

SciTech Connect

An environmental assessment of the management of organic household waste (OHW) was performed from a life cycle perspective by means of the waste-life cycle assessment (LCA) model EASEWASTE. The focus was on home composting of OHW in Denmark and six different home composting units (with different input and different mixing frequencies) were modelled. In addition, incineration and landfilling was modelled as alternatives to home composting. The most important processes contributing to the environmental impact of home composting were identified as greenhouse gas (GHG) emissions (load) and the avoided emissions in relation to the substitution of fertiliser and peat when compost was used in hobby gardening (saving). The replacement of fertiliser and peat was also identified as one of the most sensible parameters, which could potentially have a significant environmental benefit. Many of the impact categories (especially human toxicity via water (HTw) and soil (HTs)) were affected by the heavy metal contents of the incoming OHW. The concentrations of heavy metals in the compost were below the threshold values for compost used on land and were thus not considered to constitute a problem. The GHG emissions were, on the other hand, dependent on the management of the composting units. The frequently mixed composting units had the highest GHG emissions. The environmental profiles of the home composting scenarios were in the order of -2 to 16 milli person equivalents (mPE) Mg{sup -1} wet waste (ww) for the non-toxic categories and -0.9 to 28 mPE Mg{sup -1} ww for the toxic categories. Home composting performed better than or as good as incineration and landfilling in several of the potential impact categories. One exception was the global warming (GW) category, in which incineration performed better due to the substitution of heat and electricity based on fossil fuels.

Andersen, J.K.; Boldrin, A.; Christensen, T.H. [Department of Environmental Engineering, Technical University of Denmark, DK-2800 Kongens Lyngby (Denmark); Scheutz, C., E-mail: chas@env.dtu.dk [Department of Environmental Engineering, Technical University of Denmark, DK-2800 Kongens Lyngby (Denmark)

2012-01-15T23:59:59.000Z

111

EXPERIMENTAL AND THEORETICAL INVESTIGATIONS OF NEW POWER CYCLES AND ADVANCED FALLING FILM HEAT EXCHANGERS  

Science Conference Proceedings (OSTI)

The final report for the DOE/UNM grant number DE-FG26-98FT40148 discusses the accomplishments of both the theoretical analysis of advanced power cycles and experimental investigation of advanced falling film heat exchangers. This final report also includes the progress report for the third year (period of October 1, 2000 to September 30, 2001). Four new cycles were studied and two cycles were analyzed in detail based on the second law of thermodynamics. The first cycle uses a triple combined cycle, which consists of a topping cycle (Brayton/gas), an intermediate cycle (Rankine/steam), and a bottoming cycle (Rankine/ammonia). This cycle can produce high efficiency and reduces the irreversibility of the Heat Recovery Steam Generator (HRSC) of conventional combined power cycles. The effect of important system parameters on the irreversibility distribution of all components in the cycle under reasonable practical constraints was evaluated. The second cycle is a combined cycle, which consists of a topping cycle (Brayton/gas) and a bottoming cycle (Rankine/ammonia) with integrated compressor inlet air cooling. This innovative cycle can produce high power and efficiency. This cycle is also analyzed and optimized based on the second the second law to obtain the irreversibility distribution of all components in the cycle. The results of the studies have been published in peer reviewed journals and ASME conference proceeding. Experimental investigation of advanced falling film heat exchangers was conducted to find effective additives for steam condensation. Four additives have been selected and tested in a horizontal tube steam condensation facility. It has been observed that heat transfer additives have been shown to be an effective way to increase the efficiency of conventional tube bundle condenser heat exchangers. This increased condensation rate is due to the creation of a disturbance in the liquid condensate surround the film. The heat transfer through such a film has increased due to the onset of Maranogni convection as well as the population of ''dropwise-like'' condensation increased. The results have been published in peer reviewed journals.

Arsalan Razani; Kwang J. Kim

2001-12-01T23:59:59.000Z

112

Combined cycle phosphoric acid fuel cell electric power system  

DOE Green Energy (OSTI)

By arranging two or more electric power generation cycles in series, combined cycle systems are able to produce electric power more efficiently than conventional single cycle plants. The high fuel to electricity conversion efficiency results in lower plant operating costs, better environmental performance, and in some cases even lower capital costs. Despite these advantages, combined cycle systems for the 1 - 10 megawatt (MW) industrial market are rare. This paper presents a low noise, low (oxides of nitrogen) NOx, combined cycle alternative for the small industrial user. By combining a commercially available phosphoric acid fuel cell (PAFC) with a low-temperature Rankine cycle (similar to those used in geothermal applications), electric conversion efficiencies between 45 and 47 percent are predicted. While the simple cycle PAFC is competitive on a cost of energy basis with gas turbines and diesel generators in the 1 to 2 MW market, the combined cycle PAFC is competitive, on a cost of energy basis, with simple cycle diesel generators in the 4 to 25 MW market. In addition, the efficiency and low-temperature operation of the combined cycle PAFC results in a significant reduction in carbon dioxide emissions with NO{sub x} concentration on the order of 1 parts per million (per weight) (ppmw).

Mollot, D.J.; Micheli, P.L.

1995-12-31T23:59:59.000Z

113

Development of Pillared M(IV) Phosphate Phosphonate Inorganic Organic Hybrid Ion Exchange Materials for Applications in Separations found in the Nuclear Fuel Cycle  

E-Print Network (OSTI)

This dissertation focuses on key intergroup and intragroup separations found in the back end of the nuclear fuel cycle, specifically americium from lanthanides and americium from other actinides, most importantly americium from curium. Our goal is to implement a liquid-solid separation process to reduce waste and risk of contamination by the development of metal(IV) phosphate phosphonate inorganic organic hybrid ion exchange materials with the ideal formula of M(O6P2C6H4)0.5(O3POA) * nH2O, where M = Zr or Sn, A = H or Na. These materials have previously shown to have high affinity for Ln, this work will expand on the previous studies and provide methods for the above target separation, exploiting oxidation state and ion charge to drive the separation process. The optimum hydrothermal reaction conditions were determined by adjusting parameters such as reaction temperature and time, as well as the phosphonate to phosphate (pillarto-spacer) ligands ratio. Following these results four bulk syntheses were performed and their ion exchange properties were thoroughly examined. Techniques such as inductively coupled mass spectrometry and liquid scintillation counting were used to determine the affinity of the materials towards Na+, Cs+, Ca2+, Sr2+, Ni2+, Nd3+, Sm3+, Ho3+, Yb3+, NpO2+, Pu4+, PuO22+, Am3+, AmO2+, and Cm3+. Separation factors in the thousands have been observed for intergroup separations of the Ln from the alkali, alkaline earth, and low valent transition metals. A new method for Am oxidation was developed, which employed Na2S2O8 as the oxidizing agent and Ca(OCl)2 as the stabilizing agent for AmO2+ synthesis. Separation factors of 30-60 for Nd3+ and Eu3+ from AmO2+, as well as 20 for Cm3+ from AmO2+ were observed at pH 2. The work herein shows that a liquid-solid separation can be carried out for these difficult separations by means of oxidation and ion exchange.

Burns, Jonathan

2012-12-01T23:59:59.000Z

114

Initial operation and performance of a Rankine chiller and an absorption chiller in the National Security and Resources Study Center  

DOE Green Energy (OSTI)

A 60,000 ft/sup 2/ building heated and cooled with an 8,000 ft/sup 2/ array of flat plate collectors is described. The single-glazed collectors have a selective surface of black chrome. A paraffinic oil is used as the collector heat transfer fluid. In the cooling mode hot water is stored in a 5,000 gallon pressurized tank and chilled water is stored in a 10,000 gallon tank. Two water chillers are used; a conventional York lithium-bromide absorption unit derated to 85 tons with 185/sup 0/F hot water, and the other a Rankine unit designed and fabricated by Barber-Nichols. The operation of the two chillers is compared. (MHR)

Hedstrom, J.C.; Murray, H.S.; Balcomb, J.D.

1978-01-01T23:59:59.000Z

115

Ecole doctorale n 432 : Sciences des Mtiers de l'Ingnieur Doctorat ParisTech  

E-Print Network (OSTI)

FONCTIONNANT AVEC DES MELANGES ALTERNATIFS ZEOTROPES DE FLUIDES FRIGORIGENES............................... 77 (différence moyenne de température) ODP Ozone Depletion Potential (PAOS) ORC Organic Rankine Cycle PAC Pompe à compression mécanique de vapeur (CMV), cycles de Rankine organiques (ORC) ou à basse pression de vapeur d

Paris-Sud XI, Université de

116

Energy and Global Warming Impacts of CFC Alternative Technologies  

E-Print Network (OSTI)

FONCTIONNANT AVEC DES MELANGES ALTERNATIFS ZEOTROPES DE FLUIDES FRIGORIGENES............................... 77 (différence moyenne de température) ODP Ozone Depletion Potential (PAOS) ORC Organic Rankine Cycle PAC Pompe à compression mécanique de vapeur (CMV), cycles de Rankine organiques (ORC) ou à basse pression de vapeur d

Oak Ridge National Laboratory

117

Study of practical cycles for geothermal power plants. Interim report, June 15, 1975-March 31, 1976  

DOE Green Energy (OSTI)

The preliminary analysis is described in a study of practical cycles for geothermal power plants. The analysis is based on three different brines whose temperatures and composition span the range that is of practical interest for power generation. Only two kinds of cycles were considered in the analysis - the steam turbine cycle and the binary cycle, in which energy from the geothermal fluid is transferred to a secondary working fluid in a closed Rankine cycle. The performance of several condidate working fluids has been investigated, and the most attracive binary cycles have been selected for the various resource conditions. The results show that if brine is utilized directly in the primary heat exchange process with the secondary working fluid, the binary cycle is potentially better in terms of resource utilization than a dual flash steam turbine cycle. However, if the brine is flashed to steam and the steam is used for the heat exchange process, the steam turbine cycle will produce more power per pound of brine flow. Preliminary turbine designs have been formulated for steam and also for the most promising working fluids in the secondary or binary cycle. For all cycle configurations at least 50 MW of electrical power can be generated by a single unit without exceeding mechanical design or manufacturing limitations even when the resource temperature is as low as 400/sup 0/F. Plant economics were not considered.

Eskesen, J.H.

1976-04-01T23:59:59.000Z

118

DESIGN OF HYBRID POWER GENERATION CYCLES EMPLOYING AMMONIA-WATER-CARBON DIOXIDE MIXTURES  

SciTech Connect

A power cycle generates electricity from the heat of combustion of fossil fuels. Its efficiency is governed by the cycle configuration, the operating parameters, and the working fluid. Typical. designs use pure water as the fluid. in the last two decades, hybrid cycles based on ammonia-water, and carbon-dioxide mixtures as the working fluid have been proposed. These cycles may improve the power generation efficiency of Rankine cycles by 15%. Improved efficiency is important for two reasons: it lowers the cost of electricity being produced, and by reducing the consumption of fossil fuels per unit power, it reduces the generation of environmental pollutants. The goal of this project is to develop a computational optimization-based method for the design and analysis of hybrid bottoming power cycles to minimize the usage of fossil fuels. The development of this methodology has been achieved by formulating this task as that of selecting the least cost power cycle design from all possible configurations. They employ a detailed thermodynamic property prediction package they have developed under a DOE-FETC grant to model working fluid mixtures. Preliminary results from this work suggest that a pure NH{sub 3} cycle outperforms steam or the expensive Kalina cycle.

Ashish Gupta

2002-06-01T23:59:59.000Z

119

Control system options and strategies for supercritical CO2 cycles.  

SciTech Connect

The Supercritical Carbon Dioxide (S-CO{sub 2}) Brayton Cycle is a promising alternative to Rankine steam cycle and recuperated gas Brayton cycle energy converters for use with Sodium-Cooled Fast Reactors (SFRs), Lead-Cooled Fast Reactors (LFRs), as well as other advanced reactor concepts. The S-CO{sub 2} Brayton Cycle offers higher plant efficiencies than Rankine or recuperated gas Brayton cycles operating at the same liquid metal reactor core outlet temperatures as well as reduced costs or size of key components especially the turbomachinery. A new Plant Dynamics Computer Code has been developed at Argonne National Laboratory for simulation of a S-CO{sub 2} Brayton Cycle energy converter coupled to an autonomous load following liquid metal-cooled fast reactor. The Plant Dynamics code has been applied to investigate the effectiveness of a control strategy for the S-CO{sub 2} Brayton Cycle for the STAR-LM 181 MWe (400 MWt) Lead-Cooled Fast Reactor. The strategy, which involves a combination of control mechanisms, is found to be effective for controlling the S-CO{sub 2} Brayton Cycle over the complete operating range from 0 to 100 % load for a representative set of transient load changes. While the system dynamic analysis of control strategy performance for STARLM is carried out for a S-CO{sub 2} Brayton Cycle energy converter incorporating an axial flow turbine and compressors, investigations of the S-CO{sub 2} Brayton Cycle have identified benefits from the use of centrifugal compressors which offer a wider operating range, greater stability near the critical point, and potentially further cost reductions due to fewer stages than axial flow compressors. Models have been developed at Argonne for the conceptual design and performance analysis of centrifugal compressors for use in the SCO{sub 2} Brayton Cycle. Steady state calculations demonstrate the wider operating range of centrifugal compressors versus axial compressors installed in a S-CO{sub 2} Brayton Cycle as well as the benefits in expanding the range over which individual control mechanisms are effective for cycle control. However, a combination of mechanisms is still required for control of the S-CO{sub 2} Brayton Cycle between 0 and 100 % load. An effort is underway to partially validate the Argonne models and codes by means of comparison with data from tests carried out using the small-scale Sandia Brayton Loop (SBL) recuperated gas closed Brayton cycle facility. The centrifugal compressor model has been compared with data from the SBL operating with nitrogen gas and good agreement is obtained between calculations and the measured data for the compressor outlet pressure versus flow rate, although it is necessary to assume values for certain model parameters which require information about the configuration or dimensions of the compressor components that is unavailable. Unfortunately, the compressor efficiency cannot be compared with experiment data due to the lack of outlet temperature data. A radial inflow turbine model has been developed to enable further comparison of calculations with data from the SBL which incorporates both a radial inflow turbine as well as a radial compressor. Preliminary calculations of pressure ratio and efficiency versus flow rate have been carried out using the radial inflow turbine model.

Moisseytsev, A.; Kulesza, K. P.; Sienicki, J. J.; Nuclear Engineering Division; Oregon State Univ.

2009-06-18T23:59:59.000Z

120

Expeditious Data Center Sustainability, Flow, and Temperature Modeling: Life-Cycle Exergy Consumption Combined with a Potential Flow Based, Rankine Vortex Superposed, Predictive Method  

E-Print Network (OSTI)

GJ m 2 the building decommissioning exergy consumption, orJ 5.3 m 2 and that the decommissioning exergy consumption isand manufacturing. Decommissioning was counted as end-of-

Lettieri, David

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "organic rankine cycle" 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

Expeditious Data Center Sustainability, Flow, and Temperature Modeling: Life-Cycle Exergy Consumption Combined with a Potential Flow Based, Rankine Vortex Superposed, Predictive Method  

E-Print Network (OSTI)

water chillers, cooling towers and all of the ductwork,step down transforms, cooling towers, air and water sideair or water and a cooling tower. A more recent cooling

Lettieri, David

2012-01-01T23:59:59.000Z

122

The Carbon Cycle  

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

Carbon Cycle Print E-mail U.S. Carbon Cycle Science Program U.S. Carbon Cycle Science Program The U.S. Carbon Cycle Science Program, in consultation with the Carbon Cycle...

123

Carbon Cycle  

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

Carbon Cycle Carbon Cycle Latest Global Carbon Budget Estimates Including CDIAC Estimates Terrestrial Carbon Management Data Sets and Analyses Carbon Dioxide Emissions from Fossil-Fuel Consumption and Cement Manufacture, (2011) Annual Fossil-Fuel CO2 Emissions: Mass of Emissions Gridded by One Degree Latitude by One Degree Longitude (2012) Monthly Fossil-Fuel CO2 Emissions: Mass of Emissions Gridded by One Degree Latitude by One Degree Longitude (2012) Annual Fossil-Fuel CO2 Emissions: Global Stable Carbon Isotopic Signature (2012) Monthly Fossil-Fuel CO2 Emissions: Isomass (δ 13C) of Emissions Gridded by One Degree Latitude by One Degree Longitude (2012) AmeriFlux - Terrestrial Carbon Dioxide, Water Vapor, and Energy Balance Measurements Estimates of Monthly CO2 Emissions and Associated 13C/12C Values

124

STATEMENT OF CONSIDERATIONS REQUEST BY UNITED TECHNOLOGIES CORPORATION...  

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

AGREEMENT NO. DE-FG36-05G015151 ENTITLED "ORGANIC RANKINE CYCLE (ORC) FOR GEOTHERMAL ELECTRICAL POWER SYSTEM VALIDATION "; W(A)- 05-021; CH-1285 As set out in the attached...

125

Session I  

Science Conference Proceedings (OSTI)

Mar 2, 2011 ... Global demand drives the development of lower and lower grade ore bodies. ... power using: • High grade: waste heat boiler and steam turbine generator. ... Development of a Direct Evaporator for the Organic Rankine Cycle: ...

126

Advanced Multi-Effect Distillation System for Desalination Using Waste Heat fromGas Brayton Cycles  

SciTech Connect

Generation IV high temperature reactor systems use closed gas Brayton Cycles to realize high thermal efficiency in the range of 40% to 60%. The waste heat is removed through coolers by water at substantially greater average temperature than in conventional Rankine steam cycles. This paper introduces an innovative Advanced Multi-Effect Distillation (AMED) design that can enable the production of substantial quantities of low-cost desalinated water using waste heat from closed gas Brayton cycles. A reference AMED design configuration, optimization models, and simplified economics analysis are presented. By using an AMED distillation system the waste heat from closed gas Brayton cycles can be fully utilized to desalinate brackish water and seawater without affecting the cycle thermal efficiency. Analysis shows that cogeneration of electricity and desalinated water can increase net revenues for several Brayton cycles while generating large quantities of potable water. The AMED combining with closed gas Brayton cycles could significantly improve the sustainability and economics of Generation IV high temperature reactors.

Haihua Zhao; Per F. Peterson

2012-10-01T23:59:59.000Z

127

Determination of the 5 MW gross nominal design case binary cycle for power generation at Raft River, Idaho. [Using GEOSYS program  

DOE Green Energy (OSTI)

A series of Rankine cycle studies for power generation utilizing geothermal fluid as the heat source and isobutane as the working fluid are reported. To find the plant configuration which would most effectively utilize the available energy, a parametric study was performed. The desirability of supercritical, single boiler or double boiler cycles, and the relative boiler temperatures and percentage isobutane flow split between the boilers in the double cycles for geothermal fluid temperatures of 260/sup 0/F to 360/sup 0/F were considered. This study was designed to discover thermodynamic trends which would point to an optimum isobutane cycle for geothermal fluid temperatures in this temperature range. The results of the parametric study were applied to derive a Nominal Design Case for a demonstration plant at Raft River, with a geothermal fluid resource at 290/sup 0/F. In addition, plant variations due to tolerances applied to thermodynamic properties and other key factors are included.

Ingvarsson, I.J.; Madsen, W.W. (eds.)

1976-12-01T23:59:59.000Z

128

Nutrient Cycling Study  

DOE Green Energy (OSTI)

The particular goal of this study is to develop measurement techniques for understanding how consortia of organisms from geothermal facilities utilize sulfur and iron for metabolic activity; and in turn, what role that activity plays in initiating or promoting the development of a biofilm on plant substrates. Sulfur cycling is of interest because sulfur is produced in the resource. Iron is found in some of the steel formulations used in plant components and is also added as chemical treatment for reducing sulfide emissions from the plants. This report describes the set-up and operation of a bioreactor for evaluating the response of colonies of geothermal organisms to changes in nutrient and environmental conditions. Data from initial experiments are presented and plans for future testing is discussed.

Peter A. Pryfogle

2005-09-01T23:59:59.000Z

129

Available Technologies: Organic Flash Cycles for Intermediate ...  

Iron and steel production; Food and ... The implementation of OFC in these industries has the potential of an annual recovery of up to 1,703 quadrillion BTUs from ...

130

NREL: U.S. Life Cycle Inventory Database - Related Links  

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

Related Links Related Links Below are links to life cycle inventory (LCI) databases, life cycle assessment (LCA) information, LCA tools, research institutes utilizing LCA, labeling initiatives and organizations, international LCA initiatives, LCA online forums. Life Cycle Inventory Data Ecoinvent: Swiss Centre for Life Cycle Inventories IVAM LCA Data 4: Dutch LCA Database KITECH (Korea Institute of Industrial Technology): Korea National Cleaner Production Center LCI Database Life Cycle Assessment Information IERE (The Institute for Environmental Research and Education): The American Center for Life Cycle Assessment SETAC (Society of Environmental Toxicology and Chemistry): SETAC Life Cycle Assessment SPOLD (Society for Promotion of Life-cycle Assessment Development): 2.0 LCA Consultants homepage

131

PROCEEDINGS OF 1976 SUMMER WORKSHOP ON AN ENERGY EXTENSION SERVICE  

E-Print Network (OSTI)

Rankine Cycle and Stirling Cycle engines for commercial use.1, HEAT ENGINE HWY VEHICLE SYSTEM (DEVELOP STIRLING CYCLE

Authors, Various

2010-01-01T23:59:59.000Z

132

Life Cycle Engineering Group  

Science Conference Proceedings (OSTI)

... for green manufacturing and construction applications; conduct life cycle engineering assessments for energy efficiency and environmental ...

2012-08-23T23:59:59.000Z

133

Modeling Behavior Cycles as a Value System for Developmental Robots  

Science Conference Proceedings (OSTI)

The behavior of natural systems is governed by rhythmic behavior cycles at the biological, cognitive, and social levels. These cycles permit natural organisms to adapt their behavior to their environment for survival, behavioral efficiency, or evolutionary ... Keywords: SART networks, behavior cycles, developmental robotics, motivated reinforcement learning, neural networks

Kathryn E. Merrick

2010-06-01T23:59:59.000Z

134

Preliminary performance estimates of binary geothermal cycles using mixed-halocarbon working fluids  

DOE Green Energy (OSTI)

The performance of Rankine cycle binary systems for power generation using a hydrothermal resource has been investigated as a part of the DOE/GTD Heat Cycle Research Program. To date mixtures of paraffin-type hydrocarbons and water-ammonia mixtures have been investigated. This report gives the first results of the consideration of mixtures of halocarbons as working fluids in these power cycles. The performance of mixtures of Refrigerant-114 (R-114) and Refrigerant-22 (R-22) in combinations from pure R-114 to pure R-22 was calculated for such cycles. Various alternatives were considered: (1) minimum geofluid outlet temperature constraint/no constraint, (2) dry turbine expansion/expansion through vapor dome, (3) use of a turbine exhaust gas recuperator/no recuperator. Results of the study indicate that the halocarbon mixtures are at least as good as the hydrocarbon mixtures previously analyzed for a 360/sup 0/F resource. The magnitude of the net geofluid effectiveness (net energy produced per unit mass geofluid flow) for the R-114/R-22 mixtures is the same as for the best hydrocarbon mixtures previously analyzed. The percentage improvement in effectiveness in using mixtures over using the pure fluids as working fluids is comparable for both classes of working fluids. Recommendations are made to continue investigation of the halocarbon mixtures as possible alternatives to the hydrocarbon working fluids.

Bliem, C.J.

1986-07-01T23:59:59.000Z

135

MHK Technologies/Closed Cycle OTEC | Open Energy Information  

Open Energy Info (EERE)

Closed Cycle OTEC Closed Cycle OTEC < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Closed Cycle OTEC.jpg Technology Profile Primary Organization Marine Development Associates Inc Technology Resource Click here OTEC Technology Type Click here OTEC - Closed Cycle Technology Description Closed Cycle System Technology Dimensions Device Testing Date Submitted 02:50.8 << Return to the MHK database homepage Retrieved from "http://en.openei.org/w/index.php?title=MHK_Technologies/Closed_Cycle_OTEC&oldid=681555" Category: Marine and Hydrokinetic Technologies What links here Related changes Special pages Printable version Permanent link Browse properties 429 Throttled (bot load) Error 429 Throttled (bot load) Throttled (bot load)

136

An analytical study and systematic monitoring procedure developed for the load-out operation of the North Rankin Jacket 'A'  

SciTech Connect

The loadout of the 22,000 tonnes North Rankin Jacket 'A' onto a floating barge was successfully accomplished in April, 1982. During the loadout the barge ballast was continually adjusted to compensate for both jacket weight transfer onto the barge and full tide variation. The preparation for the loadout and the operation itself was characterized by newly developed integrated techniques. The techniques included: the development of a barge, jacket and quayside three-dimensional computer model to check the validity of conventional and simple ballast system software. The model was also used to evaluate the control parameters of the operation in a series of analyses which determine the sensitivity of critical steps of the operation to human or equipment errors: the development and operation of an integrated control system for jacket load transfer that relates jacket position to barge level and ballast pump requirements; the development and operation of a tide-expectation computer programme and associated ballast pump time scheduling software to compensate for differences between actual water level and that determined from standard tide tables, and to minimize the effect of short-term, local tide variations that are not forecast; and the incorporation of fail-safe concepts and measures into the operation.

Ferguson, N.; Inokoshi, O.; Kitani, T.; Masuda, S.; Zarate, H.

1983-05-01T23:59:59.000Z

137

Quantifying Carbon Cycle Feedbacks  

Science Conference Proceedings (OSTI)

Perturbations to the carbon cycle could constitute large feedbacks on future changes in atmospheric CO2 concentration and climate. This paper demonstrates how carbon cycle feedback can be expressed in formally similar ways to climate feedback, ...

J. M. Gregory; C. D. Jones; P. Cadule; P. Friedlingstein

2009-10-01T23:59:59.000Z

138

Edgeworth cycles revisited  

E-Print Network (OSTI)

Some gasoline markets exhibit remarkable price cycles, where price spikes are followed by a series of small price declines: a pattern consistent with a model of Edgeworth cycles described by Maskin and Tirole. We extend ...

Doyle, Joseph J.

139

Zeotropic mixtures of halocarbons as working fluids in binary geothermal power generation cycles  

DOE Green Energy (OSTI)

The performance of Rankine cycle binary systems for geothermal power generation using a hydrothermal resource has been investigated. To date, in addition to many pure fluids, mixtures of Paraffin-type hydrocarbons and water-ammonia mixtures have been investigated. This paper gives the results of consideration of mixtures of halocarbons as working fluids in these power cycles. The performance of mixtures of Refrigerant-114 (R-114) and Refrigerant-22 (R-22) in combinations from pure R-114 to pure R-22 was calculated for such cycles. Various alternatives were considered: (1) minimum geofluid outlet temperature constraint/no constraint, (2) dry turbine expansion/expansion through vapor dome, and (3) use of turbine exhaust gas recuperator/no recuperator. Results of the study indicate that the halocarbon mixtures are at least as good as the hydrocarbon mixtures previously analyzed for a 360 F resource. The magnitude of the net geofluid effectiveness (net energy produced per unit mass geofluid flow) for the R-114/R-22 mixtures is the same as for the best hydrocarbon mixture previously analyzed. The percentage improvement in effectiveness in using mixtures over using the pure fluids as working fluids is comparable for both classes of working fluids.

Bliem, C.J.

1987-01-01T23:59:59.000Z

140

Cycle to Cycle Manufacturing Process Control  

E-Print Network (OSTI)

Most manufacturing processes produce parts that can only be correctly measured after the process cycle has been completed. Even if in-process measurement and control is possible, it is often too expensive or complex to ...

Hardt, David E.

Note: This page contains sample records for the topic "organic rankine cycle" 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

Biomass Gasification Combined Cycle  

DOE Green Energy (OSTI)

Gasification combined cycle continues to represent an important defining technology area for the forest products industry. The ''Forest Products Gasification Initiative'', organized under the Industry's Agenda 2020 technology vision and supported by the DOE ''Industries of the Future'' program, is well positioned to guide these technologies to commercial success within a five-to ten-year timeframe given supportive federal budgets and public policy. Commercial success will result in significant environmental and renewable energy goals that are shared by the Industry and the Nation. The Battelle/FERCO LIVG technology, which is the technology of choice for the application reported here, remains of high interest due to characteristics that make it well suited for integration with the infrastructure of a pulp production facility. The capital cost, operating economics and long-term demonstration of this technology area key input to future economically sustainable projects and must be verified by the 200 BDT/day demonstration facility currently operating in Burlington, Vermont. The New Bern application that was the initial objective of this project is not currently economically viable and will not be implemented at this time due to several changes at and around the mill which have occurred since the inception of the project in 1995. The analysis shows that for this technology, and likely other gasification technologies as well, the first few installations will require unique circumstances, or supportive public policies, or both to attract host sites and investors.

Judith A. Kieffer

2000-07-01T23:59:59.000Z

142

Duty Cycle Software  

Duty cycles capture the influence of one variable in relations to the whole system. This allows for analysis in determining the impact of new ...

143

Nuclear fuel cycle costs  

Science Conference Proceedings (OSTI)

The costs for the back-end of the nuclear fuel cycle, which were developed as part of the Nonproliferation Alternative Systems Assessment Program (NASAP), are presented. Total fuel cycle costs are given for the pressurized water reactor once-through and fuel recycle systems, and for the liquid-metal fast breeder reactor system. These calculations show that fuel cycle costs are a small part of the total power costs. For breeder reactors, fuel cycle costs are about half that of the present once-through system. The total power cost of the breeder reactor system is greater than that of light-water reactor at today's prices for uranium and enrichment.

Burch, W.D.; Haire, M.J.; Rainey, R.H.

1982-02-01T23:59:59.000Z

144

Cycles in fossil diversity  

E-Print Network (OSTI)

Transitions in Global Marine Diversity, Science 281, 1157-know if this cycle is a variation in true diversity or onlyin observed diversity, but either case requires explanation

Rohde, Robert A.; Muller, Richard A.

2004-01-01T23:59:59.000Z

145

MST: Organizations: Organic Materials  

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

Adhesive Bonding Adhesive Bonding Composites Encapsulation Materials Characterization Mechanical Testing Molding, Thermoforming, & Compounding Organizations Organic Materials Composite-to-metal adhesive bond Experimental/analytical study of composit-to-metal adhesive bond. The Organic Materials department in the Advanced Manufacturing and Processing Laboratory provides innovative prototype fabrication, full service small lot production, materials technology, processing expertise, and a broad range of organic material characterization and mechanical testing techniques. We encapsulate, we join and bond, we foam, we analyze and image, we build composite structures. We strive to make you, our customers, successful! We partner with you to find the right combination of materials, processing, and fixturing that will result in the highest value

146

Power Plant Cycling Costs  

Science Conference Proceedings (OSTI)

This report provides a detailed review of the most up to date data available on power plant cycling costs. The primary objective of this report is to increase awareness of power plant cycling cost, the use of these costs in renewable integration studies and to stimulate debate between policymakers, system dispatchers, plant personnel and power utilities.

Kumar, N.; Besuner, P.; Lefton, S.; Agan, D.; Hilleman, D.

2012-07-01T23:59:59.000Z

147

User manual for GEOCOST: a computer model for geothermal cost analysis. Volume 2. Binary cycle version  

DOE Green Energy (OSTI)

A computer model called GEOCOST has been developed to simulate the production of electricity from geothermal resources and calculate the potential costs of geothermal power. GEOCOST combines resource characteristics, power recovery technology, tax rates, and financial factors into one systematic model and provides the flexibility to individually or collectively evaluate their impacts on the cost of geothermal power. Both the geothermal reservoir and power plant are simulated to model the complete energy production system. In the version of GEOCOST in this report, geothermal fluid is supplied from wells distributed throughout a hydrothermal reservoir through insulated pipelines to a binary power plant. The power plant is simulated using a binary fluid cycle in which the geothermal fluid is passed through a series of heat exchangers. The thermodynamic state points in basic subcritical and supercritical Rankine cycles are calculated for a variety of working fluids. Working fluids which are now in the model include isobutane, n-butane, R-11, R-12, R-22, R-113, R-114, and ammonia. Thermodynamic properties of the working fluids at the state points are calculated using empirical equations of state. The Starling equation of state is used for hydrocarbons and the Martin-Hou equation of state is used for fluorocarbons and ammonia. Physical properties of working fluids at the state points are calculated.

Huber, H.D.; Walter, R.A.; Bloomster, C.H.

1976-03-01T23:59:59.000Z

148

The nitrogen cycle and ecohydrology of seasonally dry grasslands  

E-Print Network (OSTI)

This thesis addresses the coupling of hydrologic and biogeochemical processes and, specifically, the organization of ecosystem traits with the water, carbon, and nitrogen cycles. Observations from a factorial irrigation- ...

Parolari, Anthony Joseph

2013-01-01T23:59:59.000Z

149

Cycles and Propagation of Deep Convection over Equatorial Africa  

Science Conference Proceedings (OSTI)

Long-term statistics of organized convection are vital to improved understanding of the hydrologic cycle at various scales. Satellite observations are used to understand the timing, duration, and frequency of deep convection in equatorial Africa, ...

Arlene G. Laing; Richard E. Carbone; Vincenzo Levizzani

2011-09-01T23:59:59.000Z

150

The Anderson Quin Cycle  

SciTech Connect

The objective of this study was to make a more refined evaluation of the Anderson Quin Cycle based on most recent information on the performance of various elements that will be used in the Anderson Quin Cycle. My original estimate of the work plan for evaluating and optimizing the Anderson Quin Cycle called for 7000 man hours of work. Since this grant was limited to 2150 man hours, we could not expect to achieve all the objectives within the allotted period of work. However, the most relevant program objectives have been completed as reported here. The analysis generally confirms the results originally estimated in my paper on the subject. (Ref. 2) Further optimizations should show even higher efficiencies. The Anderson Quin Cycle (US Patent applied for) basically consists of 5 elements in the power cycle: A refrigeration system to cool and clean the inlet air before it enters the compressor that supplies air for the gas turbine; a gas turbine consisting of a compressor, combustor, and turbine; a steam boiler and steam turbine system using the heat from the exhaust gas out of the gas turbine; a vapor turbine cycle, which utilizes the condensed heat from the exhaust of the steam turbine and the exhaust gas heat leaving the steam boiler to operate a vapor turbine cycle which utilizes another fluid than water, in this case isobutane; and the fifth element consists of a gas cooler and heat pump system, which removes the heat from the exhaust gas to lower its temperature essentially to atmospheric temperature, and at the same time permits treatment of the exhaust gas to remove acid components such as sulfur dioxide and nitrogen oxides. Current industry accepted component characteristics were incorporated in the performance analysis of the overall cycle, ensuring accurate and meaningful operating predictions. The characteristics and performance of each of the elements are described. The thermal efficiency of the optimized calculated Anderson Quin Cycle is 62 percent.

Anderson, J.H.; Bilbow, W.M.

1993-03-18T23:59:59.000Z

151

MHK Technologies/Kalina Cycle OTEC | Open Energy Information  

Open Energy Info (EERE)

Kalina Cycle OTEC Kalina Cycle OTEC < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Kalina Cycle OTEC.jpg Technology Profile Primary Organization Ocean Engineering and Energy Systems Technology Resource Click here OTEC Technology Type Click here OTEC - Closed Cycle Technology Description Kalina Cycle The Kalina Cycle is a variation of the more conventional closed cycle OTEC system incorporating aqueous ammonia ammonia water mixture as the working fluid instead of the conventional ammonia or propylene working fluid employed in earlier designs of closed cycle OTEC power systems The Kalina Cycle is a break through technology for OTEC power systems providing a nearly 80 increase in efficiency over previous closed cycle designs Because the ammonia water concentrations can be varied throughout the system to optimize according to system temperatures sort of a designer working fluid and by adding an extra component the recuperator heat losses generally experienced in other closed cycle designs can be minimized and recovered thereby improving the overall efficiency of the power cycle

152

System study on partial gasification combined cycle with CO{sub 2} recovery - article no. 051801  

Science Conference Proceedings (OSTI)

S partial gasification combined cycle with CO{sub 2} recovery is proposed in this paper. Partial gasification adopts cascade conversion of the composition of coal. Active composition of coal is simply gasified, while inactive composition, that is char, is burnt in a boiler. Oxy-fuel combustion of syngas produces only CO{sub 2} and H{sub 2}O, so the CO{sub 2} can be separated through cooling the working fluid. This decreases the amount of energy consumption to separate CO{sub 2} compared with conventional methods. The novel system integrates the above two key technologies by injecting steam from a steam turbine into the combustion chamber of a gas turbine to combine the Rankine cycle with the Brayton cycle. The thermal efficiency of this system will be higher based on the cascade utilization of energy level. Compared with the conventional integrated gasification combined cycle (IGCC), the compressor of the gas turbine, heat recovery steam generator (HRSG) and gasifier are substituted for a pump, reheater, and partial gasifier, so the system is simplified. Furthermore, the novel system is investigated by means of energy-utilization diagram methodology and provides a simple analysis of their economic and environmental performance. As a result, the thermal efficiency of this system may be expected to be 45%, with CO{sub 2} recovery of 41.2%, which is 1.5-3.5% higher than that of an IGCC system. At the same time, the total investment cost of the new system is about 16% lower than that of an IGCC. The comparison between the partial gasification technology and the IGCC technology is based on the two representative cases to identify the specific feature of the proposed system.

Xu, Y.J.; Jin, H.G.; Lin, R.M.; Han, W. [Chinese Academy of Science, Beijing (China)

2008-09-15T23:59:59.000Z

153

Cycle isolation monitoring  

SciTech Connect

There are many factors to monitor in power plants, but one that is frequently overlooked is cycle isolation. Often this is an area where plant personnel can find 'low hanging fruit' with great return on investment, especially high energy valve leakage. This type of leakage leads to increased heat rate, potential valve damage and lost generation. The fundamental question to ask is 'What is 100 Btu/kW-hr of heat rate worth to your plant? On a 600 MW coal-fired power plant, a 1% leakage can lead to an 81 Btu/kW-hr impact on the main steam cycle and a 64 Btu/kW-hr impact on the hot reheat cycle. The article gives advice on methods to assist in detecting leaking valves and to monitor cycle isolation. A software product, TP. Plus-CIM was designed to estimate flow rates of potentially leaking valves.

Svensen, L.M. III; Zeigler, J.R.; Todd, F.D.; Alder, G.C. [Santee Copper, Moncks Corner, SC (United States)

2009-07-15T23:59:59.000Z

154

The Annual Agricultural Cycle  

E-Print Network (OSTI)

. Sman shad agriculture 1.WAV Length of track 00:44:03 Related tracks (include description/relationship if appropriate) Title of track The Annual Agricultural Cycle Translation of title Description (to be used in archive entry...

Zla ba sgrol ma

2009-11-16T23:59:59.000Z

155

Crude Oil Price Cycles  

U.S. Energy Information Administration (EIA)

The heating oil and diesel price runups in late January were made even more problematic by coming on top of the high side of the latest crude market cycle.

156

Cycle Chemistry Improvement Program  

Science Conference Proceedings (OSTI)

The purity of water and steam is central to ensuring fossil plant component availability and reliability. This report, which describes formal cycle chemistry improvement programs at nine utilities, will assist utilities in achieving significant operation and maintenance cost reductions.

1997-04-21T23:59:59.000Z

157

Crude Oil Price Cycles  

Gasoline and Diesel Fuel Update (EIA)

The heating oil and diesel fuel price runups in late January were made even more problematic by coming on top of the high side of the latest crude market cycle. Over the past 10...

158

The Carbon Cycle  

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

The Carbon Cycle The Carbon Cycle The global carbon cycle involves the carbon in and exchanging between the earth's atmosphere, fossil fuels, the oceans, and the vegetation and soils of the earth's terrestrial ecosystems. image Each year, the world's terrestrial ecosystems withdraw carbon from the atmosphere through photosynthesis and add it again through respiration and decay. A more detailed look at the global carbon cycle for the 1990s is shown below. The main annual fluxes in GtC yr-1 are: pre-industrial "natural" fluxes in black and "anthropogenic" fluxes in red (modified from Sarmiento and Gruber, 2006, with changes in pool sizes from Sabine et al., 2004a). The net terrestrial loss of -39 GtC is inferred from cumulative fossil fuel emissions minus atmospheric increase minus ocean storage. The loss of

159

Secular Cycles and Millennial Trends  

E-Print Network (OSTI)

both secular cycles and millennial up- ward trend dynamics.Cycles and Millennial Trends by Andrey Korotayev, ArtemySecular Cycles and Millennial Trends 1 Initially, we want to

Korotayev, Andrey V; Malkov, Artemy S; Khaltourina, Daria A

2006-01-01T23:59:59.000Z

160

DOE Hydrogen Analysis Repository: Life Cycle Assessment of Hydrogen Fuel  

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

Life Cycle Assessment of Hydrogen Fuel Cell and Gasoline Vehicles Life Cycle Assessment of Hydrogen Fuel Cell and Gasoline Vehicles Project Summary Full Title: Life Cycle Assessment of Hydrogen Fuel Cell and Gasoline Vehicles Project ID: 143 Principal Investigator: Ibrahim Dincer Brief Description: Examines the social, environmental and economic impacts of hydrogen fuel cell and gasoline vehicles. Purpose This project aims to investigate fuel cell vehicles through environmental impact, life cycle assessment, sustainability, and thermodynamic analyses. The project will assist in the development of highly qualified personnel in such areas as system analysis, modeling, methodology development, and applications. Performer Principal Investigator: Ibrahim Dincer Organization: University of Ontario Institute of Technology

Note: This page contains sample records for the topic "organic rankine cycle" 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

Fuel Cycle and Isotopes Division  

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

Divisions Fuel Cycle and Isotopes Division Jeffrey Binder, Division Director Jeffrey Binder, Division Director The Fuel Cycle and Isotopes Division (FCID) of the Nuclear Science...

162

Organization Chart  

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

and Mission Organization Staff - Organization Chart About Us Bob Cottingham, 865-241-0554 Computational Biology and Bioinformatics Meghan Drake 865-241-8288 Michael...

163

Science Organizations  

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

Organizations Science Organizations National security depends on science and technology. The United States relies on Los Alamos National Laboratory for the best of both. No place...

164

Helium process cycle  

DOE Patents (OSTI)

A unique process cycle and apparatus design separates the consumer (cryogenic) load return flow from most of the recycle return flow of a refrigerator and/or liquefier process cycle. The refrigerator and/or liquefier process recycle return flow is recompressed by a multi-stage compressor set and the consumer load return flow is recompressed by an independent consumer load compressor set that maintains a desirable constant suction pressure using a consumer load bypass control valve and the consumer load return pressure control valve that controls the consumer load compressor's suction pressure. The discharge pressure of this consumer load compressor is thereby allowed to float at the intermediate pressure in between the first and second stage recycle compressor sets. Utilizing the unique gas management valve regulation, the unique process cycle and apparatus design in which the consumer load return flow is separate from the recycle return flow, the pressure ratios of each recycle compressor stage and all main pressures associated with the recycle return flow are allowed to vary naturally, thus providing a naturally regulated and balanced floating pressure process cycle that maintains optimal efficiency at design and off-design process cycle capacity and conditions automatically.

Ganni, Venkatarao (Yorktown, VA)

2007-10-09T23:59:59.000Z

165

Helium process cycle  

SciTech Connect

A unique process cycle and apparatus design separates the consumer (cryogenic) load return flow from most of the recycle return flow of a refrigerator and/or liquefier process cycle. The refrigerator and/or liquefier process recycle return flow is recompressed by a multi-stage compressor set and the consumer load return flow is recompressed by an independent consumer load compressor set that maintains a desirable constant suction pressure using a consumer load bypass control valve and the consumer load return pressure control valve that controls the consumer load compressor's suction pressure. The discharge pressure of this consumer load compressor is thereby allowed to float at the intermediate pressure in between the first and second stage recycle compressor sets. Utilizing the unique gas management valve regulation, the unique process cycle and apparatus design in which the consumer load return flow is separate from the recycle return flow, the pressure ratios of each recycle compressor stage and all main pressures associated with the recycle return flow are allowed to vary naturally, thus providing a naturally regulated and balanced floating pressure process cycle that maintains optimal efficiency at design and off-design process cycle capacity and conditions automatically.

Ganni, Venkatarao (Yorktown, VA)

2007-10-09T23:59:59.000Z

166

Helium process cycle  

DOE Patents (OSTI)

A unique process cycle and apparatus design separates the consumer (cryogenic) load return flow from most of the recycle return flow of a refrigerator and/or liquefier process cycle. The refrigerator and/or liquefier process recycle return flow is recompressed by a multi-stage compressor set and the consumer load return flow is recompressed by an independent consumer load compressor set that maintains a desirable constant suction pressure using a consumer load bypass control valve and the consumer load return pressure control valve that controls the consumer load compressor's suction pressure. The discharge pressure of this consumer load compressor is thereby allowed to float at the intermediate pressure in between the first and second stage recycle compressor sets. Utilizing the unique gas management valve regulation, the unique process cycle and apparatus design in which the consumer load return flow is separate from the recycle return flow, the pressure ratios of each recycle compressor stage and all main pressures associated with the recycle return flow are allowed to vary naturally, thus providing a naturally regulated and balanced floating pressure process cycle that maintains optimal efficiency at design and off-design process cycle capacity and conditions automatically.

Ganni, Venkatarao (Yorktown, VA)

2008-08-12T23:59:59.000Z

167

Power Plant Cycling Costs  

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

Power Plant Cycling Costs Power Plant Cycling Costs April 2012 N. Kumar, P. Besuner, S. Lefton, D. Agan, and D. Hilleman Intertek APTECH Sunnyvale, California NREL Technical Monitor: Debra Lew Subcontract Report NREL/SR-5500-55433 July 2012 NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency & Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. National Renewable Energy Laboratory 15013 Denver West Parkway Golden, Colorado 80401 303-275-3000 * www.nrel.gov Contract No. DE-AC36-08GO28308 Power Plant Cycling Costs April 2012 N. Kumar, P. Besuner, S. Lefton, D. Agan, and D. Hilleman Intertek APTECH Sunnyvale, California NREL Technical Monitor: Debra Lew Prepared under Subcontract No. NFT-1-11325-01

168

Superfluid thermodynamic cycle refrigerator  

DOE Patents (OSTI)

This invention is comprised of a cryogenic refrigerator which cools a heat source by cyclically concentrating and diluting the amount of [sup 3]He in a single phase [sup 3]He/[sup 4]He solution. The [sup 3]He in superfluid [sup 4]He acts in a manner of an ideal gas in a vacuum. Thus, refrigeration is obtained using any conventional thermal cycle, but preferably a Stirling or Carnot cycle. A single phase solution of liquid [sup 3]He at an initial concentration in superfluid [sup 4]He is contained in a first variable volume connected to a second variable volume through a superleak device that enables free passage of [sup 4]He while restricting passage of [sup 3]He. The [sup 3]He is compressed (concentrated) and expanded (diluted) in a phased manner to carry out the selected thermal cycle to remove heat from the heat load for cooling below 1 K.

Swift, G.W.; Kotsubo, V.Y.

1991-04-02T23:59:59.000Z

169

Superfluid thermodynamic cycle refrigerator  

DOE Patents (OSTI)

A cryogenic refrigerator cools a heat source by cyclically concentrating and diluting the amount of [sup 3]He in a single phase [sup 3]He-[sup 4]He solution. The [sup 3]He in superfluid [sup 4]He acts in a manner of an ideal gas in a vacuum. Thus, refrigeration is obtained using any conventional thermal cycle, but preferably a Stirling or Carnot cycle. A single phase solution of liquid [sup 3]He at an initial concentration in superfluid [sup 4]He is contained in a first variable volume connected to a second variable volume through a superleak device that enables free passage of [sup 4]He while restricting passage of [sup 3]He. The [sup 3]He is compressed (concentrated) and expanded (diluted) in a phased manner to carry out the selected thermal cycle to remove heat from the heat load for cooling below 1 K. 12 figs.

Swift, G.W.; Kotsubo, V.Y.

1992-12-22T23:59:59.000Z

170

Superfluid thermodynamic cycle refrigerator  

DOE Patents (OSTI)

This invention is comprised of a cryogenic refrigerator which cools a heat source by cyclically concentrating and diluting the amount of {sup 3}He in a single phase {sup 3}He/{sup 4}He solution. The {sup 3}He in superfluid {sup 4}He acts in a manner of an ideal gas in a vacuum. Thus, refrigeration is obtained using any conventional thermal cycle, but preferably a Stirling or Carnot cycle. A single phase solution of liquid {sup 3}He at an initial concentration in superfluid {sup 4}He is contained in a first variable volume connected to a second variable volume through a superleak device that enables free passage of {sup 4}He while restricting passage of {sup 3}He. The {sup 3}He is compressed (concentrated) and expanded (diluted) in a phased manner to carry out the selected thermal cycle to remove heat from the heat load for cooling below 1 K.

Swift, G.W.; Kotsubo, V.Y.

1991-04-02T23:59:59.000Z

171

Superfluid thermodynamic cycle refrigerator  

DOE Patents (OSTI)

A cryogenic refrigerator cools a heat source by cyclically concentrating and diluting the amount of .sup.3 He in a single phase .sup.3 He-.sup.4 He solution. The .sup.3 He in superfluid .sup.4 He acts in a manner of an ideal gas in a vacuum. Thus, refrigeration is obtained using any conventional thermal cycle, but preferably a Stirling or Carnot cycle. A single phase solution of liquid .sup.3 He at an initial concentration in superfluid .sup.4 He is contained in a first variable volume connected to a second variable volume through a superleak device that enables free passage of .sup.4 He while restricting passage of .sup.3 He. The .sup.3 He is compressed (concentrated) and expanded (diluted) in a phased manner to carry out the selected thermal cycle to remove heat from the heat load for cooling below 1 K.

Swift, Gregory W. (Santa Fe, NM); Kotsubo, Vincent Y. (La Canada, CA)

1992-01-01T23:59:59.000Z

172

SENSIBLE HEAT STORAGE FOR A SOLAR THERMAL POWER PLANT  

E-Print Network (OSTI)

with Brayton-cycle gas turbine topping . • , • . . • , , • -Effect of Brayton Cycle. Gas Turbine Topping on the Grossof either Brayton-cycle gas turbines or Rankine-cycle steam

Baldwin, Thomas F.

2011-01-01T23:59:59.000Z

173

Comparison of Geothermal Power Conversion Cycles  

SciTech Connect

Geothermal power conversion cycles are compared with respect to recovery of the available wellhead power. The cycles compared are flash steam, in which steam turbines are driven by steam separated from one or more flash states; binary, in which heat is transferred from flashed steam to an organic turbine cycle; and dual steam, in which two-phase expanders are driven by the flashing steam-brine mixture and steam turbines by the separated steam. Expander efficiencies assumed are 0.7 for steam turbines, 0.8 for organic turbines, and 0.6 for two-phase expanders. The fraction of available wellhead power delivered by each cycle is found to be about the same at all brine temperatures: 0.65 with one stage and 0.7 with four stages for dual stream; 0.4 with one stage and 0.6 with four stages for flash steam; 0.5 for binary; and 0.3 with one stage and 0.5 with four stages for flash binary.

Elliott, David G.

1976-12-01T23:59:59.000Z

174

Life-Cycle Analysis Process Steps  

Science Conference Proceedings (OSTI)

Table 1   Example of a life-cycle inventory for an unspecified product...70 Nontoxic chemicals 2,000 Water effluents, mg COD 1,000 BOD 150 Acid, as H + 75 Nitrates 5 Metals 300 Ammonium ions 5 Chloride ions 120 Dissolved organics 20 Suspended solids 400 Oil 100 Hydrocarbons 100 Phenol 1 Dissolved solids 400 Phosphate 5 Other nitrogen 10 Sulfate ions 10 COD, chemical...

175

Regional business cycles in Italy  

Science Conference Proceedings (OSTI)

There is clear evidence for differences in the structure of the Italian regional business cycle in the period 1951-2004: the relationship with the national business cycle is closer in the North than in the South. The interaction between regional cycles ... Keywords: Regional business cycles, Spectral analysis, Stylized facts

Camilla Mastromarco; Ulrich Woitek

2007-10-01T23:59:59.000Z

176

Organization | Department of Energy  

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

About Us Organization Organization Leadership Organization History Careers Contact Us Organization...

177

A Numerical Analysis of a Kinematic Stirling-Cycle Beat Pump for Space Conditioning Applications*  

E-Print Network (OSTI)

, and flywheel energy storage system experience Concentrating Solar Power: Stirling engines Compact Rankine design for power tower or field collector systems Phase change materials for Stirling engine integration Advanced composite materials - Concurrent engineering approach - Process optimization - NDI, repair - Full

Oak Ridge National Laboratory

178

BNL | Carbon Cycle Science  

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

The Carbon Cycle Science & Technology Group aims to increase understanding The Carbon Cycle Science & Technology Group aims to increase understanding of the impacts of global change on managed and unmanaged ecosystems and improve knowledge of possible global change mitigation approaches. The group has three main focus areas. FACE Climate Change Experimental Facility Design and Management The CCS&T group is an internationally recognized leader in the development of Free Air CO2 Enrichment (FACE) research facilities. We are interested in the design and management of manipulative experiments that examine the effects of carbon dioxide, ozone, other atmospheric pollutants, temperature and precipitation on natural and managed ecosystems. FACE Plant Physiology and High Throughput Biochemical Phenotyping At FACE facilities we have studied the mechanisms that underlie the

179

Fuel Cycle Subcommittee  

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

Report to NEAC Report to NEAC Fuel Cycle Subcommittee Meeting of April 23, 2013 Washington D.C. June 13, 2013 Burton Richter (Chair), Margaret Chu, Darleane Hoffman, Raymond Juzaitis, Sekazi K Mtingwa, Ronald P Omberg, Joy L Rempe, Dominique Warin 2 I Introduction and Summary The Fuel Cycle Subcommittee of NEAC met in Washington on April 23, 2013. The meeting focused on issues relating to the NE advanced reactor program (sections II, III, and IV), and on storage and transportation issues (section V) related to a possible interim storage program that is the first step in moving toward a new permanent repository as recommended by the Blue Ribbon Commission (BRC) and discussed in the recent response by DOE to Congress on the BRC report 1 . The agenda is given in

180

Stirling cycle engine  

DOE Patents (OSTI)

In a Stirling cycle engine having a plurality of working gas charges separated by pistons reciprocating in cylinders, the total gas content is minimized and the mean pressure equalization among the serial cylinders is improved by using two piston rings axially spaced at least as much as the piston stroke and by providing a duct in the cylinder wall opening in the space between the two piston rings and leading to a source of minimum or maximum working gas pressure.

Lundholm, Gunnar (Lund, SE)

1983-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "organic rankine cycle" 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

The Energy Strategy Cycle  

E-Print Network (OSTI)

Effective long-range energy planning begins with a reflective analysis that encompasses the complexity of today's energy reality and sets a course for activity to achieve long-range continuing advancement. This strategy approach involves an interrelated 'cycle' that once started and controlled in the proper direction is almost self-building in improvement. Energy conservation is the driving force to create additive progress involving system flexibility, process integration, and less energy dependence.

Korich, R. D.

1983-01-01T23:59:59.000Z

182

USCEA fuel cycle '93  

SciTech Connect

The US Council for Energy Awareness sponsored the Fuel Cycle '93 conference in Dallas, Texas, on March 21-24, 1993. Over 250 participants attended, numerous papers were presented, and several panel discussions were held. The focus of most industry participants remains the formation of USEC and the pending US-Russian HEU agreement. Following are brief summaries of two key papers and the Fuel Market Issues panel discussion.

Not Available

1993-04-01T23:59:59.000Z

183

NIST Organization  

Science Conference Proceedings (OSTI)

... What We Do; Organization Chart; Budget Information; Office of the Director; Laboratories & Major Programs; Locations; Staff Directory; Working With ...

2013-02-19T23:59:59.000Z

184

Symposium Organizer  

Science Conference Proceedings (OSTI)

Volunteer Training Module. March 2013. 1. Your Professional Partner for Career Advancement. Symposium Organizer. Online Training Module. March 2013 ...

185

Dynamic Mercury Cycling Model Upgrade  

Science Conference Proceedings (OSTI)

This technical update describes the status of activities to upgrade the Dynamic Mercury Cycling Model (D-MCM), an EPRI simulation model that predicts mercury cycling and bioaccumulation in lakes.

2008-12-17T23:59:59.000Z

186

Building Life-Cycle Cost (BLCC) Program | Open Energy Information  

Open Energy Info (EERE)

Building Life-Cycle Cost (BLCC) Program Building Life-Cycle Cost (BLCC) Program Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Building Life-Cycle Cost (BLCC) Program Agency/Company /Organization: United States Department of Energy Partner: National Institute of Standards and Technology Sector: Energy Focus Area: Buildings, Energy Efficiency Phase: Create a Vision, Determine Baseline, Evaluate Options, Develop Goals, Prepare a Plan Topics: Finance, Pathways analysis Resource Type: Software/modeling tools User Interface: Desktop Application Website: www1.eere.energy.gov/femp/information/download_blcc.html Cost: Free OpenEI Keyword(s): EERE tool, Building Life-Cycle Cost, BLCC References: Building Life-Cycle Cost (BLCC) Programs[1] Building Energy Software Tools Directory: BLCC[2]

187

MHK Technologies/Open Cycle OTEC | Open Energy Information  

Open Energy Info (EERE)

OTEC OTEC < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Open Cycle OTEC.jpg Technology Profile Primary Organization Ocean Engineering and Energy Systems Technology Resource Click here OTEC Technology Type Click here OTEC - Open Cycle Technology Readiness Level Click here TRL 1 3 Discovery Concept Def Early Stage Dev Design Engineering Technology Description Closed Cycle OTEC In the closed cycle OTEC system warm seawater vaporizes a working fluid such as ammonia flowing through a heat exchanger evaporator The vapor expands at moderate pressures and turns a turbine coupled to a generator that produces electricity The vapor is then condensed in another heat exchanger condenser using cold seawater pumped from the ocean s depths through a cold water pipe The condensed working fluid is pumped back to the evaporator to repeat the cycle The working fluid remains in a

188

Organic Flash Cycles for Intermediate and High Temperature Waste Reclamation  

Researchers at Berkeley Lab have developed a highly efficient technology for the reclamation of waste heat in mechanical heat engines widely used in ...

189

Thermal energy storage for integrated gasification combined-cycle power plants  

SciTech Connect

There are increasingly strong indications that the United States will face widespread electrical power generating capacity constraints in the 1990s; most regions of the country could experience capacity shortages by the year 2000. The demand for new generating capacity occurs at a time when there is increasing emphasis on environmental concerns. The integrated gasification combined-cycle (IGCC) power plant is an example of an advanced coal-fired technology that will soon be commercially available. The IGCC concept has proved to be efficient and cost-effective while meeting all current environmental regulations on emissions; however, the operating characteristics of the IGCC system have limited it to base load applications. The integration of thermal energy storage (TES) into an IGCC plant would allow it to meet cyclic loads while avoiding undesirable operating characteristics such as poor turn-down capability, impaired part-load performance, and long startup times. In an IGCC plant with TES, a continuously operated gasifier supplies medium-Btu fuel gas to a continuously operated gas turbine. The thermal energy from the fuel gas coolers and the gas turbine exhaust is stored as sensible heat in molten nitrate salt; heat is extracted during peak demand periods to produce electric power in a Rankine steam power cycle. The study documented in this report was conducted by Pacific Northwest Laboratory (PNL) and consists of a review of the technical and economic feasibility of using TES in an IGCC power plant to produce intermediate and peak load power. The study was done for the US Department of Energy's (DOE) Office of Energy Storage and Distribution. 11 refs., 5 figs., 18 tabs.

Drost, M.K.; Antoniak, Z.I.; Brown, D.R.; Somasundaram, S.

1990-07-01T23:59:59.000Z

190

Thermal energy storage for integrated gasification combined-cycle power plants  

DOE Green Energy (OSTI)

There are increasingly strong indications that the United States will face widespread electrical power generating capacity constraints in the 1990s; most regions of the country could experience capacity shortages by the year 2000. The demand for new generating capacity occurs at a time when there is increasing emphasis on environmental concerns. The integrated gasification combined-cycle (IGCC) power plant is an example of an advanced coal-fired technology that will soon be commercially available. The IGCC concept has proved to be efficient and cost-effective while meeting all current environmental regulations on emissions; however, the operating characteristics of the IGCC system have limited it to base load applications. The integration of thermal energy storage (TES) into an IGCC plant would allow it to meet cyclic loads while avoiding undesirable operating characteristics such as poor turn-down capability, impaired part-load performance, and long startup times. In an IGCC plant with TES, a continuously operated gasifier supplies medium-Btu fuel gas to a continuously operated gas turbine. The thermal energy from the fuel gas coolers and the gas turbine exhaust is stored as sensible heat in molten nitrate salt; heat is extracted during peak demand periods to produce electric power in a Rankine steam power cycle. The study documented in this report was conducted by Pacific Northwest Laboratory (PNL) and consists of a review of the technical and economic feasibility of using TES in an IGCC power plant to produce intermediate and peak load power. The study was done for the US Department of Energy's (DOE) Office of Energy Storage and Distribution. 11 refs., 5 figs., 18 tabs.

Drost, M.K.; Antoniak, Z.I.; Brown, D.R.; Somasundaram, S.

1990-07-01T23:59:59.000Z

191

Optimum cycle parameters of coal fired closed cycle gas turbine in regenerative and combined cycle configurations  

Science Conference Proceedings (OSTI)

This paper presents the methodology developed for the estimation of thermodynamic performance and reports the optimum cycle parameters of coal fired CCGT in regenerative and combined cycle configurations using air, helium and carbon dioxide as working gases. A rigorous approach has been followed for the determination of the cycle efficiency by assuming the specific heat of working gases as a continuous function of temperature for accurate estimation of cycle parameters. 14 refs.

Rao, J.S.

1982-01-01T23:59:59.000Z

192

Organization Chart  

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

spacer spacer spacer About DOE Organization News Contact Us Search Search Go spacer U.S. Department of Energy header image Science & Technology Energy Sources Energy Efficiency...

193

The Kalina cycle and similar cycles for geothermal power production  

SciTech Connect

This report contains a brief discussion of the mechanics of the Kalina cycle and ideas to extend the concept to other somewhat different cycles. A modified cycle which has a potential heat rejection advantage but little or no performance improvement is discussed. Then, the results of the application of the Kalina cycle and the modified cycle to a geothermal application (360/degree/F resource) are discussed. The results are compared with published results for the Kalina cycle with high temperature sources and estimates about performance at the geothermal temperatures. Finally, the conclusions of this scoping work are given along with recommendations of the direction of future work in this area. 11 refs., 4 figs., 1 tab.

Bliem, C.J.

1988-09-01T23:59:59.000Z

194

Direct fired power cycle  

SciTech Connect

A method for implementing a thermodynamic cycle is described comprising the steps of: expanding a gaseous working stream to transform its energy into usable form; removing from the expanded gaseous working stream a withdrawal stream; combining the withdrawal stream with a lean stream, having a higher content of a higher-boiling component than is contained in the withdrawal stream, to form a composite stream; condensing the composite stream to provide heat; separating the composite stream to form a liquid stream; forming an oncoming liquid working stream that evaporates at a temperature lower than the temperature at which the composite stream condenses; and evaporating the oncoming liquid working stream, using the heat produced by condensing the composite stream, to form the gaseous working stream.

Kalina, A.I.

1988-03-22T23:59:59.000Z

195

Feasibility of using power steering pumps in small-scale solar thermal electric power systems  

E-Print Network (OSTI)

The goal of this study was to determine performance curves for a variety of positive displacement pumps in order to select an efficient and low cost option for use as a boiler feed pump in a 1-kWe organic Rankine cycle ...

Lin, Cynthia, S.B. Massachusetts Institute of Technology

2008-01-01T23:59:59.000Z

196

September 2, 2011 Competence Center for Sustainable Energy  

E-Print Network (OSTI)

energy demand Efficient solvents for gas purification and CO2-capturing Fluid dynamic modelling Technologies Why Energy Technologies? Critical topics for today and the future Energy generation Sustainable for optimisation and certifying of energy consumption Organic Rankine Cycle (ORC) co-generation process for waste

Noé, Reinhold

197

CX-010694: Categorical Exclusion Determination  

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

Waste Heat-to-Power in Small-Scale Industry Using Scroll Expander for Organic Rankine Bottoming Cycle CX(s) Applied: A9, B3.6 Date: 07/03/2013 Location(s): Massachusetts Offices(s): Golden Field Office

198

PROCEEDINGS, Thirty-Fourth Workshop on Geothermal Reservoir Engineering Stanford University, Stanford, California, February 9-11, 2009  

E-Print Network (OSTI)

to vaporize the working fluid, isopentane. Because of the lack of sufficient cooling water for the condenser organic Rankine cycle (ORC) power system to generate commercial electricity from hot water produced generation system that uses the hot water produced by an oilfield can reliably generate commercial

Stanford University

199

A New Absorption Cycle: The Single-Effect Regenerative Absoprtion Refrigeration Cycle  

E-Print Network (OSTI)

REGENERATIVE ABSORPTION REFRIGERATION CYCLE ABSTRACT A new absorption cycle , using heat as the energy

Dao, K.

2011-01-01T23:59:59.000Z

200

Cycling on the Rise: Public Bicycles and other European Experiences | Open  

Open Energy Info (EERE)

Cycling on the Rise: Public Bicycles and other European Experiences Cycling on the Rise: Public Bicycles and other European Experiences Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Cycling on the Rise: Public Bicycles and other European Experiences Agency/Company /Organization: SpiCycles Focus Area: Transportation Resource Type: Publications, Lessons learned/best practices User Interface: Website Website: spicycles.velo.info/Portals/0/Deliverables/SpicyclesFinal_Booklet_smal Cost: Free Cycling on the Rise: Public Bicycles and other European Experiences Screenshot References: Cycling on the Rise: Public Bicycles and other European Experiences[1] "When the Spicycles project was launched in 2006, cycling was not the "hot" mode of transport that it has become today. As project partners, we wanted to gather experience related to specific areas of cycling policy.

Note: This page contains sample records for the topic "organic rankine cycle" 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
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201

Life Cycle Analysis: Power Studies Compilation Report  

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

Hour LC Life Cycle LCA Life Cycle Analysis LCC Life Cycle Costing LCI Life Cycle Inventory LCOE Levelized Cost of Delivered Electricity LNB Low NO x Burner LNG Liquefied...

202

Closed-cycle Retrofit Study  

Science Conference Proceedings (OSTI)

EPRI is investigating implications of a potential U.S. Environmental Protection Agency (EPA) Clean Water Act 316(b) rulemaking that would establish "Best Technology Available" (BTA) based on closed-cycle cooling retrofits for facilities with once-through cooling. This report focuses on estimated costs associated with closed-cycle cooling system retrofits that include: 1) capital costs, 2) energy required to operate the closed-cycle system, 3) heat rate penalty, and 4) extended downtime required to retrof...

2011-01-31T23:59:59.000Z

203

Advanced regenerative absorption refrigeration cycles  

DOE Patents (OSTI)

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

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

1990-01-01T23:59:59.000Z

204

Carbon Cycle 2.0  

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

Carbon Cycle 2.0 Carbon Cycle 2.0 Pioneering science for sustainable energy solutions Artificial Photosynthesis Energy Storage Combustion Carbon Capture & Storage Developing World Efficiency Photovoltaics Biofuels Energy Analysis Climate Modeling Carbon Cycle 2.0 is... 1. A vision for * a global energy system integrated with the Earth's natural carbon cycles * an interactive Berkeley Lab environment with a shared sense of purpose 2. A program development plan that will allow us to deepen our capabilities and provide more opportunities to have impact 3. An attempt to integrate our basic research with applications using models of technology deployment constraints 4. Set of internal activities aimed at priming the effort

205

Optimization of Air Conditioning Cycling.  

E-Print Network (OSTI)

??Systems based on the vapor compression cycle are the most widely used in a variety of air conditioning applications. Despite the vast growth of modern… (more)

Seshadri, Swarooph

2012-01-01T23:59:59.000Z

206

Award Cycle at a Glance  

Science Conference Proceedings (OSTI)

Award Cycle at a Glance. 2013. Eligibility Certification February 19 (with a nomination to the Board of Examiners). April 2 (without a nomination). ...

2013-07-22T23:59:59.000Z

207

Multivariable cycle-to-cycle of an injection molding process  

E-Print Network (OSTI)

Cycle-to-Cycle (CtC) feedback control has been studied extensively with increasing demands on the precision and quality of manufactured parts. Single input-Single output has been studied as the basis of CtC feedback control. ...

Vanderpuije, Curtis N

2005-01-01T23:59:59.000Z

208

Prospective Life-Cycle Modeling of Novel Carbon Capture Materials  

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

Prospective Life-Cycle Modeling of Novel Carbon Capture Materials Prospective Life-Cycle Modeling of Novel Carbon Capture Materials Speaker(s): Roger Sathre Date: December 5, 2011 - 3:30pm Location: 90-4133 Seminar Host/Point of Contact: Anita Estner Barbara Adams In this presentation we describe the prospective life-cycle modeling of metal-organic frameworks (MOF), a novel type of material with the potential for efficiently capturing CO2. Life-cycle modeling of emerging technologies, conducted early in the innovation process, can generate knowledge that can feed back to inform scientific discovery and development. We discuss the challenges of credibly modeling a system that does not yet exist, and describe methodological approaches including parametric system modeling (quantifying relations between system elements), scenario projections (defining plausible pathways for system scale-up),

209

The closed fuel cycle  

Science Conference Proceedings (OSTI)

Available in abstract form only. Full text of publication follows: The fast growth of the world's economy coupled with the need for optimizing use of natural resources, for energy security and for climate change mitigation make energy supply one of the 21. century most daring challenges. The high reliability and efficiency of nuclear energy, its competitiveness in an energy market undergoing a new oil shock are as many factors in favor of the 'renaissance' of this greenhouse gas free energy. Over 160,000 tHM of LWR1 and AGR2 Used Nuclear Fuel (UNF) have already been unloaded from the reactor cores corresponding to 7,000 tons discharged per year worldwide. By 2030, this amount could exceed 400,000 tHM and annual unloading 14,000 tHM/year. AREVA believes that closing the nuclear fuel cycle through the treatment and recycling of Used Nuclear Fuel sustains the worldwide nuclear power expansion. It is an economically sound and environmentally responsible choice, based on the preservation of natural resources through the recycling of used fuel. It furthermore provides a safe and secure management of wastes while significantly minimizing the burden left to future generations. (authors)

Froment, Antoine; Gillet, Philippe [AREVA NC (France)

2007-07-01T23:59:59.000Z

210

Nuclear fuel cycle information workshop  

SciTech Connect

This overview of the nuclear fuel cycle is divided into three parts. First, is a brief discussion of the basic principles of how nuclear reactors work; second, is a look at the major types of nuclear reactors being used and world-wide nuclear capacity; and third, is an overview of the nuclear fuel cycle and the present industrial capability in the US.

1983-01-01T23:59:59.000Z

211

Reading Comprehension - The Water Cycle  

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

The Water Cycle The Water Cycle Evaporation, Condensation and Precipitation The _________ moon sun water clouds evaporates _________ fish oceans rain water from lakes and oceans. As the air rises, it cools. The water vapor condenses into tiny droplets of _________ evaporation clouds water sunshine . The droplets crowd together and form a _________ cloud lake storm precipitation . Wind blows the _________ rain sun droplet cloud towards the land. The tiny droplets join together and fall as precipitation to the _________ river lake ground cloud . The water soaks into the ground and collects in _________ rivers and lakes oceans and clouds jars and cups plants and animals . The _________ storm cycle river house that never ends has started again! A water cycle diagram. Use the diagram to identify the different parts of the water cycle:

212

CMVRTC: Heavy Truck Duty Cycle  

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

heavy truck duty cycle (HTDC) project heavy truck duty cycle (HTDC) project OVERVIEW The Heavy Truck Duty Cycle (HTDC) Project was initiated in 2004 and is sponsored by the US Department of Energy's (DOE's) Office of FreedomCar and Vehicle Technologies Program. ORNL designed the research program to generate real-world-based duty cycle data from trucks operating in long-haul operations and was designed to be conducted in three phases: identification of parameters to be collected, instrumentation and pilot testing, identification of a real-world fleet, design of the data collection suite and fleet instrumentation, and data collection, analysis, and development of a duty cycle generation tool (DCGT). ANL logo dana logo michelin logo Schrader logo This type of data will be useful for supporting energy efficiency

213

The DOE water cycle pilot study.  

SciTech Connect

In 1999, the U.S. Global Change Research Program (USGCRP) formed a Water Cycle Study Group (Hornberger et al. 2001) to organize research efforts in regional hydrologic variability, the extent to which this variability is caused by human activity, and the influence of ecosystems. The USGCRP Water Cycle Study Group was followed by a U.S. Department of Energy (DOE) Water Cycle Research Plan (Department of Energy 2002) that outlined an approach toward improving seasonal-to-interannual hydroclimate predictability and closing a regional water budget. The DOE Water Cycle Research Plan identified key research areas, including a comprehensive long-term observational database to support model development, and to develop a better understanding of the relationship between the components of local water budgets and large scale processes. In response to this plan, a multilaboratory DOE Water Cycle Pilot Study (WCPS) demonstration project began with a focus on studying the water budget and its variability at multiple spatial scales. Previous studies have highlighted the need for continued efforts to observationally close a local water budget, develop a numerical model closure scheme, and further quantify the scales in which predictive accuracy are optimal. A concerted effort within the National Oceanic and Atmospheric Administration (NOAA)-funded Global Energy and Water Cycle Experiment (GEWEX) Continental-scale International Project (GCIP) put forth a strategy to understand various hydrometeorological processes and phenomena with an aim toward closing the water and energy budgets of regional watersheds (Lawford 1999, 2001). The GCIP focus on such regional budgets includes the measurement of all components and reduction of the error in the budgets to near zero. To approach this goal, quantification of the uncertainties in both measurements and modeling is required. Model uncertainties within regional climate models continue to be evaluated within the Program to Intercompare Regional Climate Simulations (Takle et al. 1999), and model uncertainties within land surface models are being evaluated within the Program to Intercompare Land Surface Schemes (e.g., Henderson-Sellers 1993; Wood et al. 1998; Lohmann et al. 1998). In the context of understanding the water budget at watershed scales, the following two research questions that highlight DOE's unique water isotope analysis and high-performance modeling capabilities were posed as the foci of this pilot study: (1) Can the predictability of the regional water budget be improved using high-resolution model simulations that are constrained and validated with new hydrospheric water measurements? (2) Can water isotopic tracers be used to segregate different pathways through the water cycle and predict a change in regional climate patterns? To address these questions, numerical studies using regional atmospheric-land surface models and multiscale land surface hydrologic models were generated and, to the extent possible, the results were evaluated with observations. While the number of potential processes that may be important in the local water budget is large, several key processes were examined in detail. Most importantly, a concerted effort was made to understand water cycle processes and feedbacks at the land surface-atmosphere interface at spatial scales ranging from 30 m to hundreds of kilometers. A simple expression for the land surface water budget at the watershed scale is expressed as {Delta}S = P + G{sub in} - ET - Q - G{sub out}, where {Delta}S is the change in water storage, P is precipitation, ET is evapotranspiration, Q is streamflow, G{sub in} is groundwater entering the watershed, and G{sub out} is groundwater leaving the watershed, per unit time. The WCPS project identified data gaps and necessary model improvements that will lead to a more accurate representation of the terms in Eq. (1). Table 1 summarizes the components of this water cycle pilot study and the respective participants. The following section provides a description of the surface observation and modeling sit

Miller, N. L.; King, A. W.; Miller, M. A.; Springer, E. P.; Wesely, M. L.; Bashford, K. E.; Conrad, M. E.; Costigan, K.; Foster, P. N.; Gibbs, H. K.; Jin, J.; Klazura, J.; Lesht, B. M.; Machavaram, M. V.; Pan, F.; Song, J.; Troyan, D.; Washngton-Allen, R. A.; Environmental Research; LBNL; ORNL; BNL; LANL

2005-03-01T23:59:59.000Z

214

Submitting Organization:  

E-Print Network (OSTI)

i ii The focus of this project is to develop a new large-volume application for selfcementing coal combustion products, namely in situ stabilization of gravel roads using self-cementing CCPs. Within the reduced scope of the project, the emphasis was placed on assessing the engineering properties of two recycled materials and a natural aggregate. Laboratory experiments were conducted in which a road surface gravel (RSG), a recycled pavement material (RPM), a natural crushed aggregate (Class 5 base) were tested to determine the California bearing ratio (CBR), resilient modulus (Mr), and unconfined compressive strength (UCS). The recycled materials were blended with two fly ash contents (10 and 15%) and three curing times (7, 28, and 56 d). A Class C fly ash with 0.7 % loss on ignition was used. Resilient modulus and unconfined compression strength tests were also conducted after 5 cycles of freezing and thawing to asses the impact of freeze-thaw cycling. Unstabilized RSG and RPM had CBRs greater than that of Class 5 base, but all

Wilfung Martono; Board Regents; University Of Wisconsin-madison

2008-01-01T23:59:59.000Z

215

Limit Cycle and Conserved Dynamics  

E-Print Network (OSTI)

We demonstrate that a potential coexists with limit cycle. Here the potential determines the final distribution of population. Our demonstration consists of three steps: We first show the existence of limit from a typical physical sciences setting: the potential is a type of Mexican hat type, with the strength of a magnetic field scale with the strength the potential gradient near the limit cycle, and the friction goes to zero faster than the potential near the limit cycle. Hence the dynamics at the limit cycle is conserved. The diffusion matrix is nevertheless finite at the limit cycle. Secondly, we construct the potential in the dynamics with limit cycle in a typical dynamical systems setting. Thirdly, we argue that such a construction can be carried out in a more general situation based on a method discovered by one of us. This method of dealing with stochastic differential equation is in general different from both Ito and Stratonovich calculus. Our result may be useful in many related applications, such as in the discussion of metastability of limit cycle and in the construction of Hopfield potential in the neural network computation.

X. -M. Zhu; L. Yin; P. Ao

2004-12-21T23:59:59.000Z

216

CMVRTC: Medium Truck Duty Cycle  

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

medium truck duty cycle (MTdc) project medium truck duty cycle (MTdc) project OVERVIEW The Medium Truck Duty Cycle (MTDC) project involves efforts to collect, analyze and archive data related to medium-truck operations in real-world driving environments. Such data and information will be useful to support technology evaluation efforts and to provide a means of accounting for real-world driving performance within medium-class truck analyses. The project involves private industry partners from various truck vocations. The MTDC project is unique in that there currently does not exist a national database of characteristic duty cycles for medium trucks. This project involves the collection of data from multiple vocations (four vocations) and multiple vehicles within these vocations (three vehicles per

217

Minimize Boiler Short Cycling Losses  

SciTech Connect

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

2006-01-01T23:59:59.000Z

218

Alternative Cycles for Power Converters  

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

expansion in the high pressure turbine by passing it through an additional lead-to-steam heat exchanger (HX). This can be a complication relative to the superheated steam cycle....

219

Deoxygenation in Cycling Fossil Plants  

Science Conference Proceedings (OSTI)

Minimizing shutdown oxygen levels at a cycling fossil plant can reduce corrosion product transport to the boilers. In this study two forms of activated carbon were used to catalyze the oxygen/hydrazine reaction and minimize oxygen levels.

1992-05-01T23:59:59.000Z

220

Ammonium generation during SRAT cycle  

DOE Green Energy (OSTI)

During the IDMS noble-metal demonstration runs ammonium nitrate deposition was found in the vessel vent system of the feed preparation area. In the bench-scale experiments of studying the hydrogen generation during the sludge treatment cycle, ammonium ion production was also monitored. It was found that: During a simulation of the DWPF Cold Chemical Runs SRAT cycle no detectable amount of ammonium ions was generated when treating a non-noble-metal containing sludge simulant according to the nitric acid flowsheet. Ammonium ions were generated during the SRAT-SME cycle when treating the noble-metal containing sludge with either formic acid or nitric acid/late-washing PHA. This is due to the reaction between formic acid and nitrate catalyzed by the noble metals in the sludge simulant. Ammonium ion production closely followed the hydrogen evolution from the catalytic decomposition of formic acid. This report summarizes the results of the production of ammonia during the SRAT cycle.

Hsu, C.W.

1992-10-13T23:59:59.000Z

Note: This page contains sample records for the topic "organic rankine cycle" 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

American business cycles and innovation  

E-Print Network (OSTI)

Economists have long studied innovation and its effects on business cycles. Economist Joseph Alois Schumpeter (1883-1950) was the first economist to thoroughly discuss these ideas in his Theorie der wirtschaftlichen Entwicklung, published in 1911 (English translation: The Theory of Economic Development, 1934). This paper focuses on three issues: defining innovation, defining and identifying business cycles, and determining which innovations caused which business cycles. The first section introduces the concepts of innovation and invention. The second section discusses the business cycles and highlights general causes of business cycles. The final section details the history of the iron, steel, aluminum, and pharmaceutical industries and incorporates the available business and economic data (output, productivity, inventories, and capital investment) required to answer the central question: which innovations caused which business cycles? The iron industry, examined over the sixteenth and seventeenth centuries, reveals that its relationship to the business cycle is likely significant but was difficult to quantify because of limited data. An examination of the steel industry from the post-Civil War period to the early twentieth century follows. The steel industry had a significant effect on the business cycle and seemed to direct the business cycle during the growth in railroad mileage. Steel was a huge and indispensable industry for most of the 20[th] century so it makes a very important case to study. The aluminum industry is relevant to examine because the process for making aluminum has remained the same since the American inventor, Charles Hall, patented his method in 1889. The contribution of aluminum was significant because of the introduction of the large-scale electrical generators needed to produce aluminum. Finally, the paper focuses on the contribution of the pharmaceutical industry to the business cycle. The pharmaceutical industry is important to this study because it has already proved to be a major source of innovation and is an industry that will continue to play a significant role in the American economy. The findings reveal the contribution from this industry was most significant in the post-World War II era of research and development. The paper concludes with suggestions for improving and expanding this innovation and business cycle study.

Hood, Michael

2004-01-01T23:59:59.000Z

222

International Nuclear Fuel Cycle Fact Book. Revision 5  

SciTech Connect

This Fact Book has been compiled in an effort to provide: (1) an overview of worldwide nuclear power and fuel cycle programs; and (2) current data concerning fuel cycle and waste management facilities, R and D programs, and key personnel in countries other than the United States. Additional information on each country's program is available in the International Source Book: Nuclear Fuel Cycle Research and Development, PNL-2478, Rev. 2. The Fact Book is organized as follows: (1) Overview section - summary tables which indicate national involvement in nuclear reactor, fuel cycle, and waste management development activities; (2) national summaries - a section for each country which summarizes nuclear policy, describes organizational relationships and provides addresses, names of key personnel, and facilities information; (3) international agencies - a section for each of the international agencies which has significant fuel cycle involvement; (4) energy supply and demand - summary tables, including nuclear power projections; (5) fuel cycle - summary tables; and (6) travel aids international dialing instructions, international standard time chart, passport and visa requirements, and currency exchange rate.

Harmon, K.M.; Lakey, L.T.; Leigh, I.W.; Jeffs, A.G.

1985-01-01T23:59:59.000Z

223

International nuclear fuel cycle fact book. Revision 4  

SciTech Connect

This Fact Book has been compiled in an effort to provide (1) an overview of worldwide nuclear power and fuel cycle programs and (2) current data concerning fuel cycle and waste management facilities, R and D programs, and key personnel in countries other than the United States. Additional information on each country's program is available in the International Source Book: Nuclear Fuel Cycle Research and Development, PNL-2478, Rev. 2. The Fact Book is organized as follows: (1) Overview section - summary tables which indicate national involvement in nuclear reactor, fuel cycle, and waste management development activities; (2) national summaries - a section for each country which summarizes nuclear policy, describes organizational relationships and provides addresses, names of key personnel, and facilities information; (3) international agencies - a section for each of the international agencies which has significant fuel cycle involvement; (4) energy supply and demand - summary tables, including nuclear power projections; (5) fuel cycle - summary tables; and (6) travel aids - international dialing instructions, international standard time chart, passport and visa requirements, and currency exchange rate.

Harmon, K.M.; Lakey, L.T.; Leigh, I.W.

1984-03-01T23:59:59.000Z

224

Low emission advanced power cycle. Final CRADA report.  

SciTech Connect

Today's gas turbines are based on the Brayton Cycle in which heat is added to the working fluid at constant pressure. An alternate approach, the Humphrey cycle, provides a higher theoretical thermal efficiency by adding heat at constant, or near constant volume. A few practical examples of such engines appeared in the mid 1900's, but they were largely superseded by the Brayton engine. Although the conventional gas turbine has been developed to a high level of efficiency and reliability, significant improvements in performance are becoming increasingly costly to obtain. Efficiencies of compressors, turbines and combustors are approaching theoretical limits. Cooling and materials technologies continue to improve but higher cycle temperatures may be limited by NOx emissions. While heat exchangers, intercoolers and other features improve cycle efficiency they add significantly to the cost, weight and volume of the basic engine and for flight applications may always be impractical. For these reasons there has been renewed interest in recent years in the constant volume Humphrey cycle focusing mainly on pulsing systems in which heat is added by a rapid series of detonations. Variations on this basic scheme are being evaluated for aircraft propulsions systems. General Electric has established a joint program with several Russian organizations to explore devices based on pressure rise combustion cycle and to make fundamental measurements of detonation properties of mixtures of hydrocarbon fuels and air.

Tentner, A.; Nuclear Engineering Division

2010-07-13T23:59:59.000Z

225

Lessons Learned From Dynamic Simulations of Advanced Fuel Cycles  

SciTech Connect

Years of performing dynamic simulations of advanced nuclear fuel cycle options provide insights into how they could work and how one might transition from the current once-through fuel cycle. This paper summarizes those insights from the context of the 2005 objectives and goals of the Advanced Fuel Cycle Initiative (AFCI). Our intent is not to compare options, assess options versus those objectives and goals, nor recommend changes to those objectives and goals. Rather, we organize what we have learned from dynamic simulations in the context of the AFCI objectives for waste management, proliferation resistance, uranium utilization, and economics. Thus, we do not merely describe “lessons learned” from dynamic simulations but attempt to answer the “so what” question by using this context. The analyses have been performed using the Verifiable Fuel Cycle Simulation of Nuclear Fuel Cycle Dynamics (VISION). We observe that the 2005 objectives and goals do not address many of the inherently dynamic discriminators among advanced fuel cycle options and transitions thereof.

Steven J. Piet; Brent W. Dixon; Jacob J. Jacobson; Gretchen E. Matthern; David E. Shropshire

2009-04-01T23:59:59.000Z

226

Photovoltaics: Life-cycle Analyses  

DOE Green Energy (OSTI)

Life-cycle analysis is an invaluable tool for investigating the environmental profile of a product or technology from cradle to grave. Such life-cycle analyses of energy technologies are essential, especially as material and energy flows are often interwoven, and divergent emissions into the environment may occur at different life-cycle-stages. This approach is well exemplified by our description of material and energy flows in four commercial PV technologies, i.e., mono-crystalline silicon, multi-crystalline silicon, ribbon-silicon, and cadmium telluride. The same life-cycle approach is applied to the balance of system that supports flat, fixed PV modules during operation. We also discuss the life-cycle environmental metrics for a concentration PV system with a tracker and lenses to capture more sunlight per cell area than the flat, fixed system but requires large auxiliary components. Select life-cycle risk indicators for PV, i.e., fatalities, injures, and maximum consequences are evaluated in a comparative context with other electricity-generation pathways.

Fthenakis V. M.; Kim, H.C.

2009-10-02T23:59:59.000Z

227

Life Cycle Inventory of a CMOS Chip  

E-Print Network (OSTI)

Reichl, H. “Life cycle inventory analysis and identificationAllen, D.T. ; “Life cycle inventory development for waferLife Cycle Inventory of a CMOS Chip Sarah Boyd and David

Boyd, Sarah; Dornfeld, David; Krishnan, Nikhil

2006-01-01T23:59:59.000Z

228

The DOE Water Cycle Pilot Study  

E-Print Network (OSTI)

The DOE Water Cycle Pilot Study N.L. Miller 1 *, A.W. KingCycle Research Strategy, DOE SC-0043, Office of BiologicalLBNL Report LBNL-53826. The DOE Water Cycle Pilot Study is

2003-01-01T23:59:59.000Z

229

Dynamics of organic matter production and degradation during coastal diatom blooms.  

E-Print Network (OSTI)

??Experiments were designed to answer key questions about diatom-derived organic matter cycling (i.e., production and degradation) in coastal systems. Dissolved organic matter (DOM) production was… (more)

[No author

2006-01-01T23:59:59.000Z

230

Building Technologies Office: Life Cycle Inventory Database  

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

Life Cycle Inventory Database to someone by E-mail Share Building Technologies Office: Life Cycle Inventory Database on Facebook Tweet about Building Technologies Office: Life...

231

NETL Life Cycle Analysis Fact Sheets  

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

Life Cycle Analysis Fact Sheets Life Cycle Analysis Role of Alternative Energy Sources - Wind Technology Assessment PDF-372KB (Sept 2012) Role of Alternative Energy Sources -...

232

New Regenerative Cycle for Vapor Compression Refrigeration  

Office of Scientific and Technical Information (OSTI)

SCIENTIFIC REPORT SCIENTIFIC REPORT Title Page Project Title: New Regenerative Cycle for Vapor Compression Refrigeration DOE Award Number: DE-FG36-04GO14327 Document Title: Final Scientific Report Period Covered by Report: September 30, 2004 to September 30, 2005 Name and Address of Recipient Organization: Magnetic Development, Inc., 68 Winterhill Road, Madison, CT 06443, phone: 203-214-7247, fax: 203-421-7948, e-mail: mjb1000@aol.com Contact Information: Mark J. Bergander, Ph.D., P.E., Principal Investigator, phone: 203-214-7247, fax: 203-421-7948, e-mail: mjb1000@aol.com Project Objective (as stated in the proposal): The main objective of this project is to confirm on a well-instrumented prototype the theoretically derived claims of higher efficiency and coefficient

233

Life Cycle Analysis: Integrated Gasification Combined Cycle (IGCC) Power Plant  

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

Life Cycle Analysis: Integrated Life Cycle Analysis: Integrated Gasification Combined Cycle (IGCC) Power Plant Revision 2, March 2012 DOE/NETL-2012/1551 Disclaimer This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or

234

Geothermal heat cycle research: Supercritical cycle with horizontal counterflow condenser  

DOE Green Energy (OSTI)

The Heat Cycle Research Program, which is being conducted for the Department of Energy, has as its objective the development of the technology for effecting the improved utilization of moderate temperature geothermal resources. To meet this objective, the program has as one of its goals to improve the performance of geothermal binary cycles to levels approaching the practicable thermodynamic maximum. In pursuit of this goal, tests are being conducted at the Heat Cycle Research Facility located at the DOE Geothermal Test Facility, East Mesa, California. The current testing involves the investigation of binary power cycle performance utilizing mixtures of non-adjacent hydrocarbons as the working fluids, with supercritical vaporization and in-tube condensation of the working fluid. In addition to the present test program, preparations are being made to investigate the binary cycle performance improvements which can be achieved by allowing supersaturated vapor expansions in the turbine. These efforts are anticipated to verify that through the utilization of these advanced power cycle concepts and allowing the supersaturated turbine expansions, improvements of up to 28% in the net geofluid effectiveness (net watt hours plant output per pound of geofluid) over conventional binary power plants can be achieved. Results are presented for the recent testing including those tests examining the performance of the countercurrent condenser at different tube inclinations. Performance of the heaters and the condenser in a vertical orientation can be predicted well with existing methods and data. The condenser in its near horizontal orientation performs slightly worse than in its vertical orientation. Some problems have been encountered in predicting the performance in the horizontal orientation. There is no evidence of departure from integral condensation in either orientation.

Mines, G.L.; Swank, W.D.; Bliem, C.J.

1987-01-01T23:59:59.000Z

235

Applicant Organization: | Department of Energy  

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

Applicant Organization: Applicant Organization: Applicant Organization: More Documents & Publications BlueFire Ethanol, Inc. Applicant Organization: Applicant Organization:...

236

Why sequence Sulfur cycling in the Frasassi aquifer?  

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

sulfur cycling in the Frasassi aquifer? sulfur cycling in the Frasassi aquifer? The terrestrial subsurface remains one of the least explored microbial habitats on earth, and is critical for understanding pollutant migration and attenuation, subsurface processes such as limestone dissolution (affecting porosity), and the search for life elsewhere in the solar system and beyond. The deep and sulfidic Frasassi aquifer (of Ancona, Italy) has emerged as a model system for studying sulfur cycling in the terrestrial subsurface, and this sequencing project has relevance for developing applications for wastewater treatment and capabilities relevant for radionuclide, metal and organic pollutant remediation that can be applied at environments at DOE subsurface sites. Principal Investigators: Jennifer Macalady, Penn State University

237

Nuclear Power Generation and Fuel Cycle Report 1997  

Gasoline and Diesel Fuel Update (EIA)

7) 7) Distribution Category UC-950 Nuclear Power Generation and Fuel Cycle Report 1997 September 1997 Energy Information Administration Office of Coal, Nuclear, Electric and Alternate Fuels U.S. Department of Energy Washington, DC 20585 This report was prepared by the Energy Information Administration, the independent statistical and analytical agency within the Department of Energy. The information contained herein should not be construed as advocating or reflecting any policy position of the Department of Energy or of any other organization. Contacts Energy Information Administration/ Nuclear Power Generation and Fuel Cycle Report 1997 ii The Nuclear Power Generation and Fuel Cycle Report is prepared by the U.S. Department of Energy's Energy Information Administration. Questions and comments concerning the contents of the report may be directed to:

238

Answering Key Fuel Cycle Questions  

Science Conference Proceedings (OSTI)

Given the range of fuel cycle goals and criteria, and the wide range of fuel cycle options, how can the set of options eventually be narrowed in a transparent and justifiable fashion? It is impractical to develop all options. We suggest an approach that starts by considering a range of goals for the Advanced Fuel Cycle Initiative (AFCI) and then posits seven questions, such as whether Cs and Sr isotopes should be separated from spent fuel and, if so, what should be done with them. For each question, we consider which of the goals may be relevant to eventually providing answers. The AFCI program has both ''outcome'' and ''process'' goals because it must address both waste already accumulating as well as completing the fuel cycle in connection with advanced nuclear power plant concepts. The outcome objectives are waste geologic repository capacity and cost, energy security and sustainability, proliferation resistance, fuel cycle economics, and safety. The process objectives are rea diness to proceed and adaptability and robustness in the face of uncertainties.

Piet, S.J.; Dixon, B.W.; Bennett, R.G.; Smith, J.D.; Hill, R.N.

2004-10-03T23:59:59.000Z

239

ORGANICS: YARD TRIMMINGS AND FOOD SCRAPS  

E-Print Network (OSTI)

This chapter describes the methodology used in EPA’s Waste Reduction Model (WARM) to estimate streamlined life-cycle greenhouse gas (GHG) emission factors for yard trimmings and food scraps beginning at the point of waste generation. The WARM GHG emission factors are used to compare the net emissions associated with these two organic material types in the following three

unknown authors

2012-01-01T23:59:59.000Z

240

NETL - Petroleum-Based Fuels Life Cycle Greenhouse Gas Analysis 2005  

Open Energy Info (EERE)

NETL - Petroleum-Based Fuels Life Cycle Greenhouse Gas Analysis 2005 NETL - Petroleum-Based Fuels Life Cycle Greenhouse Gas Analysis 2005 Baseline Model Jump to: navigation, search Tool Summary LAUNCH TOOL Name: NETL - Petroleum-Based Fuels Life Cycle Greenhouse Gas Analysis 2005 Baseline Model Agency/Company /Organization: National Energy Technology Laboratory Sector: Energy Topics: Baseline projection, GHG inventory Resource Type: Software/modeling tools Website: www.netl.doe.gov/energy-analyses/refshelf/results.asp?ptype=Models/Too References: NETL - Petroleum-Based Fuels Life Cycle Greenhouse Gas Analysis 2005 Baseline Model [1] NETL - Petroleum-Based Fuels Life Cycle Greenhouse Gas Analysis 2005 Baseline Model This model calculates the 2005 national average life cycle greenhouse gas emissions for petroleum-based fuels sold or distributed in the United

Note: This page contains sample records for the topic "organic rankine cycle" 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

Department of Energy Awards $15 Million for Nuclear Fuel Cycle Technology  

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

15 Million for Nuclear Fuel Cycle 15 Million for Nuclear Fuel Cycle Technology Research and Development Department of Energy Awards $15 Million for Nuclear Fuel Cycle Technology Research and Development August 1, 2008 - 2:40pm Addthis WASHINGTON, DC - The U.S. Department of Energy (DOE) today announced it will award up to $15 million to 34 research organizations as part of the Department's Advanced Fuel Cycle Initiative (AFCI). AFCI is the Department's nuclear energy research and development program supporting the long-term goals and objectives of the United States' nuclear energy policy. These projects will provide necessary data and analyses to further U.S. nuclear fuel cycle technology development, meet the need for advanced nuclear energy production and help to close the nuclear fuel cycle

242

ARM - Evaluation Product - Organic Aerosol Component VAP  

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

ProductsOrganic Aerosol Component VAP ProductsOrganic Aerosol Component VAP Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Evaluation Product : Organic Aerosol Component VAP 2011.01.08 - 2012.03.24 Site(s) SGP General Description Organic aerosol (OA, i.e., the organic fraction of particles) accounts for 10-90% of the fine aerosol mass globally and is a key determinant of aerosol radiative forcing. But atmospheric OA is poorly characterized and its life cycle insufficiently represented in models. As a result, current models are unable to simulate OA concentrations and properties. This deficiency represents a large source of uncertainty in the quantification of aerosol direct and indirect effects and the prediction of future climate change. The Organic Aerosol Component (OACOMP) value-added product (VAP) uses

243

Ultrafast thermal cycling of solar panels  

SciTech Connect

Two new cyclers that utilize a novel hybrid approach to perform fast thermal cycling of solar panels have been built and are now operational in the Mechanics and Materials Technology Center at The Aerospace Corporation. These cyclers are part of a continuing effort to minimize solar cell life test durations by accelerating the cycling rates. These fully automated cyclers, which provide continuous unmanned cycling in a gaseous nitrogen atmosphere, can execute 5 min cycles, thus yielding in excess of 100,000 cycles per year. They also have a unique capability of verifying solar panel functionality without interruption of cycling, so that cycling doesn`t continue on nonfunctioning panels.

Wall, T.S.; Valenzuela, P.R.; Sue, C.

1998-08-15T23:59:59.000Z

244

The cycle of plastic waste.  

E-Print Network (OSTI)

?? This study deals with the informal plastic recovery system in Addis Ababa. The purpose of this thesis is to explore the organization and the… (more)

Bjerkli, Camilla Louise

2005-01-01T23:59:59.000Z

245

H gas turbine combined cycle  

SciTech Connect

A major step has been taken in the development of the Next Power Generation System--``H`` Technology Combined Cycle. This new gas turbine combined-cycle system increases thermal performance to the 60% level by increasing gas turbine operating temperature to 1,430 C (2,600 F) at a pressure ratio of 23 to 1. Although this represents a significant increase in operating temperature for the gas turbine, the potential for single digit NOx levels (based upon 15% O{sub 2}, in the exhaust) has been retained. The combined effect of performance increase and environmental control is achieved by an innovative closed loop steam cooling system which tightly integrates the gas turbine and steam turbine cycles. The ``H`` Gas Turbine Combined Cycle System meets the goals and objectives of the DOE Advanced Turbine System Program. The development and demonstration of this new system is being carried out as part of the Industrial/Government cooperative agreement under the ATS Program. This program will achieve first commercial operation of this new system before the end of the century.

Corman, J.

1995-12-31T23:59:59.000Z

246

LDPC codes from Singer cycles  

Science Conference Proceedings (OSTI)

The main goal of coding theory is to devise efficient systems to exploit the full capacity of a communication channel, thus achieving an arbitrarily small error probability. Low Density Parity Check (LDPC) codes are a family of block codes-characterised ... Keywords: LDPC Codes, Projective spaces, Singer cycles

Luca Giuzzi; Angelo Sonnino

2009-04-01T23:59:59.000Z

247

Reading Comprehension - Organs and Organ Systems  

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

together in a group make up an organ system. Examples of organ systems are cats and dogs the circulatory system and the respiratory system the stomacular system and...

248

NREL: TroughNet - Parabolic Trough Power Plant System Technology  

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

Parabolic Trough Power Plant System Technology Parabolic Trough Power Plant System Technology A parabolic trough solar power plant uses a large field of collectors to supply thermal energy to a conventional power plant. Because they use conventional power cycles, parabolic trough power plants can be hybridized-other fuels can be used to back up the solar power. Like all power cycles, trough power plants also need a cooling system to transfer waste heat to the environment. Parabolic trough power plant technologies include: Direct steam generation Fossil-fired (hybrid) backup Operation and maintenance Power cycles Steam Rankine Organic Rankine Combined Wet and dry cooling Power Cycles A photo of an aerial view of a power plant in the middle of a solar field with rows and rows of parabolic troughs tracking. The cooling towers can be seen with the water plume rising into the air. The white water tanks can be seen in the background.

249

Medium Truck Duty Cycle (MTDC)  

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

Routes Data Acquisition System Setup Routes Data Acquisition System Setup Medium Truck Duty Cycle (MTDC) Objective This Department of Energy project focuses on the collection and analysis medium truck (Class-6 and -7) duty cycle data from real-world operations. Analysis of this data will provide information pertaining to the fuel efficiencies and performance of medium trucks in several vocations. Outcomes Rich source of data and information that can contribute to the development of new tools Sound basis upon which DOE can make technology investment decisions A national archive of real-world-based medium-truck operational data that will support medium-duty vehicle energy efficiency research Collected Data Speed & Acceleration Fuel Consumption GPS Location Road Grade

250

Advanced Fuel Cycle Cost Basis  

SciTech Connect

This report, commissioned by the U.S. Department of Energy (DOE), provides a comprehensive set of cost data supporting a cost analysis for the relative economic comparison of options for use in the Advanced Fuel Cycle Initiative (AFCI) Program. The report describes the AFCI cost basis development process, reference information on AFCI cost modules, a procedure for estimating fuel cycle costs, economic evaluation guidelines, and a discussion on the integration of cost data into economic computer models. This report contains reference cost data for 25 cost modules—23 fuel cycle cost modules and 2 reactor modules. The cost modules were developed in the areas of natural uranium mining and milling, conversion, enrichment, depleted uranium disposition, fuel fabrication, interim spent fuel storage, reprocessing, waste conditioning, spent nuclear fuel (SNF) packaging, long-term monitored retrievable storage, near surface disposal of low-level waste (LLW), geologic repository and other disposal concepts, and transportation processes for nuclear fuel, LLW, SNF, transuranic, and high-level waste.

D. E. Shropshire; K. A. Williams; W. B. Boore; J. D. Smith; B. W. Dixon; M. Dunzik-Gougar; R. D. Adams; D. Gombert; E. Schneider

2009-12-01T23:59:59.000Z

251

Combined-cycle power tower  

DOE Green Energy (OSTI)

This paper evaluates a new power tower concept that offers significant benefits for commercialization of power tower technology. The concept uses a molten nitrate salt centralreceiver plant to supply heat, in the form of combustion air preheat, to a conventional combined-cycle power plant. The evaluation focused on first commercial plants, examined three plant capacities (31, 100, and 300 MWe), and compared these plants with a solar-only 100-MWe plant and with gas-only combined-cycle plants in the same three capacities. Results of the analysis point to several benefits relative to the solar-only plant including low energy cost for first plants, low capital cost for first plants, reduced risk with respect to business uncertainties, and the potential for new markets. In addition, the concept appears to have minimal technology development requirements. Significantly, the results show that it is possible to build a first plant with this concept that can compete with existing gas-only combined-cycle plants.

Bohn, M.S.; Williams, T.A.; Price, H.W.

1994-10-01T23:59:59.000Z

252

Advanced Fuel Cycle Cost Basis  

SciTech Connect

This report, commissioned by the U.S. Department of Energy (DOE), provides a comprehensive set of cost data supporting a cost analysis for the relative economic comparison of options for use in the Advanced Fuel Cycle Initiative (AFCI) Program. The report describes the AFCI cost basis development process, reference information on AFCI cost modules, a procedure for estimating fuel cycle costs, economic evaluation guidelines, and a discussion on the integration of cost data into economic computer models. This report contains reference cost data for 25 cost modules—23 fuel cycle cost modules and 2 reactor modules. The cost modules were developed in the areas of natural uranium mining and milling, conversion, enrichment, depleted uranium disposition, fuel fabrication, interim spent fuel storage, reprocessing, waste conditioning, spent nuclear fuel (SNF) packaging, long-term monitored retrievable storage, near surface disposal of low-level waste (LLW), geologic repository and other disposal concepts, and transportation processes for nuclear fuel, LLW, SNF, transuranic, and high-level waste.

D. E. Shropshire; K. A. Williams; W. B. Boore; J. D. Smith; B. W. Dixon; M. Dunzik-Gougar; R. D. Adams; D. Gombert; E. Schneider

2008-03-01T23:59:59.000Z

253

Advanced Fuel Cycle Cost Basis  

SciTech Connect

This report, commissioned by the U.S. Department of Energy (DOE), provides a comprehensive set of cost data supporting a cost analysis for the relative economic comparison of options for use in the Advanced Fuel Cycle Initiative (AFCI) Program. The report describes the AFCI cost basis development process, reference information on AFCI cost modules, a procedure for estimating fuel cycle costs, economic evaluation guidelines, and a discussion on the integration of cost data into economic computer models. This report contains reference cost data for 26 cost modules—24 fuel cycle cost modules and 2 reactor modules. The cost modules were developed in the areas of natural uranium mining and milling, conversion, enrichment, depleted uranium disposition, fuel fabrication, interim spent fuel storage, reprocessing, waste conditioning, spent nuclear fuel (SNF) packaging, long-term monitored retrievable storage, near surface disposal of low-level waste (LLW), geologic repository and other disposal concepts, and transportation processes for nuclear fuel, LLW, SNF, and high-level waste.

D. E. Shropshire; K. A. Williams; W. B. Boore; J. D. Smith; B. W. Dixon; M. Dunzik-Gougar; R. D. Adams; D. Gombert

2007-04-01T23:59:59.000Z

254

Toward single-cycle optical pulses  

E-Print Network (OSTI)

Single-cycle optical pulses, the never-before-achieved regime, have a great potential for attosecond science and phase-sensitive nonlinear optics. To achieve single-cycle optical pulses by active synchronization, three ...

Kim, Jung-Won, 1976-

2004-01-01T23:59:59.000Z

255

Global Changes of the Water Cycle Intensity  

Science Conference Proceedings (OSTI)

In this study, numerical simulations of the twentieth-century climate are evaluated, focusing on the changes in the intensity of the global water cycle. A new model diagnostic of atmospheric water vapor cycling rate is developed and employed that ...

Michael G. Bosilovich; Siegfried D. Schubert; Gregory K. Walker

2005-05-01T23:59:59.000Z

256

Rethinking the light water reactor fuel cycle  

E-Print Network (OSTI)

The once through nuclear fuel cycle adopted by the majority of countries with operating commercial power reactors imposes a number of concerns. The radioactive waste created in the once through nuclear fuel cycle has to ...

Shwageraus, Evgeni, 1973-

2004-01-01T23:59:59.000Z

257

Annual Cycle of Surface Longwave Radiation  

Science Conference Proceedings (OSTI)

The annual cycles of upward and downward longwave fluxes at the earth’s surface are investigated by use of the NASA Global Energy and Water Cycle Experiment (GEWEX) Surface Radiation Budget Dataset. Principal component analysis is used to quantify ...

Pamela E. Mlynczak; G. Louis Smith; Anne C. Wilber; Paul W. Stackhouse

2011-06-01T23:59:59.000Z

258

Profit cycle dynamics by Kawika Pierson.  

E-Print Network (OSTI)

My thesis consists of three essays investigating the existence, causes, and mitigation of profit cycles at an industry level. The first essay examines profit cycles by proposing that the industry-specific features of how ...

Pierson, Kawika (Kawika Paul)

2011-01-01T23:59:59.000Z

259

WEB RESOURCES: The Nuclear Fuel Cycle - TMS  

Science Conference Proceedings (OSTI)

Feb 12, 2007 ... A compilation of links to websites describing the nuclear fuel cycle. A link to a short overview of the entire cycle is included as well as a ...

260

Application of the thorium fuel cycle  

SciTech Connect

An economic analysis of the application of the thorium fuel cycle to thermal reactors is presented. (JWR)

Kasten, P.R.; Tobias, M.L.

1975-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "organic rankine cycle" 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

Combined Cycle Performance Tracking Guideline: Interim Report  

Science Conference Proceedings (OSTI)

The Electric Power Research Institute’s (EPRI’s) Combined Cycle Performance Monitoring and Recovery Guideline (EPRI report 1023971) was developed in 2012 to provide plant owners and operators with a comprehensive guideline for identifying and quantifying combined-cycle performance losses and appropriate recovery activities for a generic F-Class combined-cycle power plant (CCPP). This report, Combined-Cycle Performance Tracking Guideline, has been developed as an adjunct ...

2013-12-23T23:59:59.000Z

262

Political Cycles and the Stock Market  

E-Print Network (OSTI)

forecast the stock market as controls for business cycle ?uctuations. After controlling for the dividend-price

Santa-Clara, Pedro; Valkanov, Rossen

2000-01-01T23:59:59.000Z

263

Development Plan for the Fuel Cycle Simulator  

Science Conference Proceedings (OSTI)

The Fuel Cycle Simulator (FCS) project was initiated late in FY-10 as the activity to develop a next generation fuel cycle dynamic analysis tool for achieving the Systems Analysis Campaign 'Grand Challenge.' This challenge, as documented in the Campaign Implementation Plan, is to: 'Develop a fuel cycle simulator as part of a suite of tools to support decision-making, communication, and education, that synthesizes and visually explains the multiple attributes of potential fuel cycles.'

Brent Dixon

2011-09-01T23:59:59.000Z

264

Search for relationship between duration of the extended solar cycles and amplitude of sunspot cycle  

E-Print Network (OSTI)

Duration of the extended solar cycles is taken into the consideration. The beginning of cycles is counted from the moment of polarity reversal of large-scale magnetic field in high latitudes, occurring in the sunspot cycle n till the minimum of the cycle n+2. The connection between cycle duration and its amplitude is established. Duration of the "latent" period of evolution of extended cycle between reversals and a minimum of the current sunspot cycle is entered. It is shown, that the latent period of cycles evolution is connected with the next sunspot cycle amplitude and can be used for the prognosis of a level and time of a sunspot maximum. The 24-th activity cycle prognosis is done. Long-term behavior of extended cycle's lengths is considered.

Tlatov, A G

2007-01-01T23:59:59.000Z

265

Search for relationship between duration of the extended solar cycles and amplitude of sunspot cycle  

E-Print Network (OSTI)

Duration of the extended solar cycles is taken into the consideration. The beginning of cycles is counted from the moment of polarity reversal of large-scale magnetic field in high latitudes, occurring in the sunspot cycle n till the minimum of the cycle n+2. The connection between cycle duration and its amplitude is established. Duration of the "latent" period of evolution of extended cycle between reversals and a minimum of the current sunspot cycle is entered. It is shown, that the latent period of cycles evolution is connected with the next sunspot cycle amplitude and can be used for the prognosis of a level and time of a sunspot maximum. The 24-th activity cycle prognosis is done. Long-term behavior of extended cycle's lengths is considered.

A. G. Tlatov

2007-03-27T23:59:59.000Z

266

MHD Integrated Topping Cycle Project  

DOE Green Energy (OSTI)

This eighteenth quarterly technical progress report of the MHD Integrated Topping cycle Project presents the accomplishments during the period November 1, 1991 to January 31, 1992. The precombustor is fully assembled. Manufacturing of all slagging stage components has been completed. All cooling panels were welded in place and the panel/shell gap was filled with RTV. Final combustor assembly is in progress. The low pressure cooling subsystem (LPCS) was delivered to the CDIF. Second stage brazing issues were resolved. The construction of the two anode power cabinets was completed.

Not Available

1992-07-01T23:59:59.000Z

267

Utilization of geopressured resources in the oxidation of organic waste in supercritical water. Phase I, Final report  

DOE Green Energy (OSTI)

Geopressured resources are geothermal reservoirs containing dissolved methane in hot brine at pressures well in excess of their in situ hydrostatic pressure. In the US, geopressured resources are primarily located in the Gulf (of Mexico) Coast. The wells in this area are characterized by typical bottomhole temperatures of 120-180 C (250-360 F) (Negus-de Wys, 1991a) and bottomhole pressures of 675-1275 bar (9,800-18,500 psia) (Negus-de Wys, 1991b). Supercritical water oxidation (SCWO) is an emerging technology for the destruction of hazardous organic waste in which oxidation is carried out in a water medium above the critical point of pure water (374 C/705 F, 221 bar/3208 psia) (Tester et al., 1992). Geopressured resources are particularly suitable as an input stream to a SCWO waste treatment process due to the near critical conditions of their hot brine. By using a Rankine-type power cycle, electric power can be generated by capturing the available thermal and hydraulic energy from the geothermal resource and the chemical energy of the dissolved methane released by the oxidation process. In addition to oxidizing the methane to convert the chemical energy to thermal energy, auxiliary fuel in the form of an organic waste can be co-oxidized to increase the energy output to commercially sustainable levels. Coupling the treatment of geopressured brine with an organic waste in a SCWO process synergistically improves power production while providing a means for treating hazardous waste. The objective of this study is to assess the feasibility of using geopressured resources to simultaneously detoxify hazardous waste and generate electric power. Our ultimate aim is to develop conceptual process designs for above-ground and fully or modified in situ approaches to co-processing organic waste with geopressured brine in supercritical water. As a preparatory step for investigating in situ approaches, a realistic above-ground conceptual design was developed in this study. In that concept, the waste, brine and oxidant (air or oxygen) are introduced into the SCWO reactor at the system pressure of 234 bar (3400 psia). The heat of oxidation raises the temperature of the system to about 600 C (1100 F). Due to the low solubility of inorganic salts in supercritical water (about 200 ppm or less) (Armellini and Tester, 1990, 1991a, 1991b), solid salt forms and falls to the lower section of the reactor, where it is cooled and quenched with water, creating a concentrated (organic-free) brine that would be mixed with brackish water and reinjected back to the geopressured well. Power is generated by the expansion of the products of the SCWO process through a series of multi-stage turboexpanden. A processing capacity of 100,000 gallons per day (gpd) was initially taken as the design basis, following some investigations carried out at the Idaho National Engineering Laboratory (Propp et al., 1990). The process was modeled using the ASPEN PLUS{trademark} process flowsheet simulator and material and energy balances were determined. Both the cases of using air and oxygen as oxidant were investigated. Toluene was chosen as the model compound to represent the organic waste. Turbine design calculations based on the volumetric flowrates obtained for a 100,000 gpd capacity resulted in unrealistically high rotor rotational speeds and small wheel pitch diameters to achieve optimum efficiencies. Higher SCWO effluent flowrates would lower rotor rotational speeds and increase wheel pitch diameters to more practical levels. Thus, a 42-fold larger design capacity of 100,000 barrels per day (bpd) was adopted as the basis for an above-ground base case. The results for the material and energy balances for a processing capacity of 100,000 bpd using air and oxygen as oxidant scale up linearly from the results for the 100,000 gpd case. The best case flowsheet corresponding to a 100,000 bpi case using oxygen as oxidant is given in Figure 1. Our conceptual design study suggests that simultaneous detoxification of hazardous waste and production of power is possible by co-pr

Diaz, Alexander F.; Herzog, Howard J.; Tester, Jefferson W.

1992-11-01T23:59:59.000Z

268

Nuclear Power Generation and Fuel Cycle Report 1996  

Gasoline and Diesel Fuel Update (EIA)

6) 6) Distribution Category UC-950 Nuclear Power Generation and Fuel Cycle Report 1996 October 1996 Energy Information Administration Office of Coal, Nuclear, Electric and Alternate Fuels U.S. Department of Energy Washington, DC 20585 This report was prepared by the Energy Information Administration, the independent statistical and analytical agency within the Department of Energy. The information contained herein should not be construed as advocating or reflecting any policy position of the Department of Energy or of any other organization. Energy Information Administration/ Nuclear Power Generation and Fuel Cycle Report 1996 ii Contacts This report was prepared in the Office of Coal, Nuclear, report should be addressed to the following staff Electric and Alternate Fuels by the Analysis and Systems

269

Advanced Fuel Cycle Economic Sensitivity Analysis  

Science Conference Proceedings (OSTI)

A fuel cycle economic analysis was performed on four fuel cycles to provide a baseline for initial cost comparison using the Gen IV Economic Modeling Work Group G4 ECON spreadsheet model, Decision Programming Language software, the 2006 Advanced Fuel Cycle Cost Basis report, industry cost data, international papers, the nuclear power related cost study from MIT, Harvard, and the University of Chicago. The analysis developed and compared the fuel cycle cost component of the total cost of energy for a wide range of fuel cycles including: once through, thermal with fast recycle, continuous fast recycle, and thermal recycle.

David Shropshire; Kent Williams; J.D. Smith; Brent Boore

2006-12-01T23:59:59.000Z

270

Understanding the petrochemical cycle: Part 1  

Science Conference Proceedings (OSTI)

Fitness in the hydrocarbon processing industry (HPI) arena involves understanding and coping with business cycles: supply and demand. This becomes increasingly more important as the industry globalizes and matures. Competitive-edge thinking needs to look hard at the forces that influence business cycles. Recognition of potential pitfalls is very important when considering: future capacity expansion, mergers and acquisitions, market departure, plant closure, potential product substitution, etc. Understanding pricing mechanisms and the workings of hockey-stick profitability profiles help HPI operators endure cycle downturns and prepare plants to maximize profits for the next upswing. The paper discusses characteristic trends, cycles in the hydrocarbon processing industry, current conditions, and mitigating cycle effects.

Sedriks, W. (SRI International, Menlo Park, CA (United States))

1994-03-01T23:59:59.000Z

271

Current Forecast for Sunspot Cycle 24 Parameters  

Science Conference Proceedings (OSTI)

Our prediction for the development of sunspot cycle 23 activity came true; one of the very few to have attained this status. We use the 3?cycle quasi?periodicity observed in the planetary index Ap. We improve our method by including data for 150 years and draw inferences as to what to expect for the development phase of cycle 24. Our forecast for the smoothed sunspot number at cycle 24 peak 78±5 in June 2013; the possibility that next three cycles may be progressively less active cannot be ruled out; the trend may possibly continue for the rest of the 21st century.

H. S. Ahluwalia; R. C. Ygbuhay

2010-01-01T23:59:59.000Z

272

Conceptual design of an advanced absorption cycle: the double-effect regenerative absorption refrigeration cycle  

DOE Green Energy (OSTI)

An advanced absorption refrigeration cycle was proposed as a heat-activated refrigeration system. Referred to as the double-effect regenerative absorption cycle of cycle 2R, it improves the performance of the conventional single-effect absorption cycle at high heat source temperatures. The performance of cycle 2R continually improves as input temperatures rise, in contrast to the conventional double-effect absorption cycle that has a sharp cut-off temperature below which it ceases to operate. Cycle 2R operates with two subcycles, the first-effect and the second-effect subcycles.

Dao, K.

1978-09-01T23:59:59.000Z

273

MHD Integrated Topping Cycle Project  

DOE Green Energy (OSTI)

The overall objective of the project is to design and construct prototypical hardware for an integrated MHD topping cycle, and conduct long duration proof-of-concept tests of integrated system at the US DOE Component Development and Integration Facility in Butte, Montana. The results of the long duration tests will augment the existing engineering design data base on MHD power train reliability, availability, maintainability, and performance, and will serve as a basis for scaling up the topping cycle design to the next level of development, an early commercial scale power plant retrofit. The components of the MHD power train to be designed, fabricated, and tested include: A slagging coal combustor with a rated capacity of 50 MW thermal input, capable of operation with an Eastern (Illinois {number sign}6) or Western (Montana Rosebud) coal, a segmented supersonic nozzle, a supersonic MHD channel capable of generating at least 1.5 MW of electrical power, a segmented supersonic diffuser section to interface the channel with existing facility quench and exhaust systems, a complete set of current control circuits for local diagonal current control along the channel, and a set of current consolidation circuits to interface the channel with the existing facility inverter.

Not Available

1992-01-01T23:59:59.000Z

274

Technology development life cycle processes.  

SciTech Connect

This report and set of appendices are a collection of memoranda originally drafted in 2009 for the purpose of providing motivation and the necessary background material to support the definition and integration of engineering and management processes related to technology development. At the time there was interest and support to move from Capability Maturity Model Integration (CMMI) Level One (ad hoc processes) to Level Three. As presented herein, the material begins with a survey of open literature perspectives on technology development life cycles, including published data on %E2%80%9Cwhat went wrong.%E2%80%9D The main thrust of the material presents a rational expose%CC%81 of a structured technology development life cycle that uses the scientific method as a framework, with further rigor added from adapting relevant portions of the systems engineering process. The material concludes with a discussion on the use of multiple measures to assess technology maturity, including consideration of the viewpoint of potential users.

Beck, David Franklin

2013-05-01T23:59:59.000Z

275

MHD Integrated Topping Cycle Project  

DOE Green Energy (OSTI)

The Magnetohydrodynamics (MHD) Integrated Topping Cycle (ITC) Project represents the culmination of the proof-of-concept (POC) development stage in the US Department of Energy (DOE) program to advance MHD technology to early commercial development stage utility power applications. The project is a joint effort, combining the skills of three topping cycle component developers: TRW, Avco/TDS, and Westinghouse. TRW, the prime contractor and system integrator, is responsible for the 50 thermal megawatt (50 MW{sub t}) slagging coal combustion subsystem. Avco/TDS is responsible for the MHD channel subsystem (nozzle, channel, diffuser, and power conditioning circuits), and Westinghouse is responsible for the current consolidation subsystem. The ITC Project will advance the state-of-the-art in MHD power systems with the design, construction, and integrated testing of 50 MW{sub t} power train components which are prototypical of the equipment that will be used in an early commercial scale MHD utility retrofit. Long duration testing of the integrated power train at the Component Development and Integration Facility (CDIF) in Butte, Montana will be performed, so that by the early 1990's, an engineering data base on the reliability, availability, maintainability and performance of the system will be available to allow scaleup of the prototypical designs to the next development level. This Sixteenth Quarterly Technical Progress Report covers the period May 1, 1991 to July 31, 1991.

Not Available

1992-03-01T23:59:59.000Z

276

Fuel Cycle CrossCut Group  

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

CrossCut Group CrossCut Group 1 NERAC Briefing: Assessment of Dose of Closed vs Open Gen-IV Fuel Cycles David Wade NERAC Meeting September 30, 2002 Fuel Cycle CrossCut Group 2 Public Dose and Worker Dose Comparison of Open vs Closed Fuel Cycles * Gen-IV fuel cycle options are meant to address all stated Gen-IV Goals - Dose to workers and to the public is one of the numerous elements to be evaluated by Gen-IV R&D - The Fuel Cycle Crosscut Group was assigned to take an early look at dose implication tradeoffs of open and closed fuel cycles * FCCG Interpretation of Assignment: - Collect already-existing evaluations and prepare a briefing on what is currently known Fuel Cycle CrossCut Group 3 Approach * Look at Actual Historical Doses Based on Operational Experience - Data compiled by the United Nations Scientific Committee on the Effects of Atomic

277

Definition: Brayton cycle | Open Energy Information  

Open Energy Info (EERE)

form form View source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Definition Edit with form History Facebook icon Twitter icon » Definition: Brayton cycle Jump to: navigation, search Dictionary.png Brayton cycle A thermodynamic cycle using constant pressure, heat addition and rejection. Fuel and a compressor are used to heat and increase the pressure of a gas; the gas expands and spins the blades of a turbine, which, when connected to a generator, generates electricity.[1][2] View on Wikipedia Wikipedia Definition The Brayton cycle is a thermodynamic cycle that describes the workings of a constant pressure heat engine. Gas turbine engines and airbreathing jet engines use the Brayton Cycle. Although the Brayton cycle

278

VISION: Verifiable Fuel Cycle Simulation Model  

Science Conference Proceedings (OSTI)

The nuclear fuel cycle is a very complex system that includes considerable dynamic complexity as well as detail complexity. In the nuclear power realm, there are experts and considerable research and development in nuclear fuel development, separations technology, reactor physics and waste management. What is lacking is an overall understanding of the entire nuclear fuel cycle and how the deployment of new fuel cycle technologies affects the overall performance of the fuel cycle. The Advanced Fuel Cycle Initiative’s systems analysis group is developing a dynamic simulation model, VISION, to capture the relationships, timing and delays in and among the fuel cycle components to help develop an understanding of how the overall fuel cycle works and can transition as technologies are changed. This paper is an overview of the philosophy and development strategy behind VISION. The paper includes some descriptions of the model and some examples of how to use VISION.

Jacob J. Jacobson; Abdellatif M. Yacout; Gretchen E. Matthern; Steven J. Piet; David E. Shropshire

2009-04-01T23:59:59.000Z

279

Fuel Cycle Research and Development Program  

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

Development Program Presentation to Office of Environmental Management Tank Waste Corporate Board James C. Bresee, ScD, JD Advisory Board Member Office of Nuclear Energy July 29, 2009 July 29, 2009 Fuel Cycle Research and Development DM 195665 2 Outline Fuel Cycle R&D Mission Changes from the Former Advanced Fuel Cycle Initiative The Science-Based Approach Key Collaborators Budget History Program Elements Summary July 29, 2009 Fuel Cycle Research and Development DM 195665 3 Fuel Cycle R&D Mission The mission of Fuel Cycle Research and Development is to develop options to current fuel cycle management strategy to enable the safe, secure, economic, and sustainable expansion of nuclear energy while reducing proliferation risks by conducting

280

Open-cycle OTEC system performance analysis. [Claude cycle  

DOE Green Energy (OSTI)

An algorithm developed to calculate the performance of Claude-Cycle ocean thermal energy conversion (OTEC) systems is described. The algorithm treats each component of the system separately and then interfaces them to form a complete system, allowing a component to be changed without changing the rest of the algorithm. Two components that are subject to change are the evaporator and condenser. For this study we developed mathematical models of a channel-flow evaporator and both a horizontal jet and spray director contact condenser. The algorithm was then programmed to run on SERI's CDC 7600 computer and used to calculate the effect on performance of deaerating the warm and cold water streams before entering the evaporator and condenser, respectively. This study indicates that there is no advantage to removing air from these streams compared with removing the air from the condenser.

Lewandowski, A.A.; Olson, D.A.; Johnson, D.H.

1980-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "organic rankine cycle" 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

Answering Key Fuel Cycle Questions  

Science Conference Proceedings (OSTI)

The Advanced Fuel Cycle Initiative (AFCI) program has both “outcome” and “process” goals because it must address both waste already accumulating as well as completing the fuel cycle in connection with advanced nuclear power plant concepts. The outcome objectives are waste geological repository capacity and cost, energy security and sustainability, proliferation resistance, fuel cycle economics, and safety. The process objectives are readiness to proceed and adaptability and robustness in the face of uncertainties. A classic decision-making approach to such a multi-attribute problem would be to weight individual quantified criteria and calculate an overall figure of merit. This is inappropriate for several reasons. First, the goals are not independent. Second, the importance of different goals varies among stakeholders. Third, the importance of different goals is likely to vary with time, especially the “energy future.” Fourth, some key considerations are not easily or meaningfully quantifiable at present. Instead, at this point, we have developed 16 questions the AFCI program should answer and suggest an approach of determining for each whether relevant options improve meeting each of the program goals. We find that it is not always clear which option is best for a specific question and specific goal; this helps identify key issues for future work. In general, we suggest attempting to create as many win-win decisions (options that are attractive or neutral to most goals) as possible. Thus, to help clarify why the program is exploring the options it is, and to set the stage for future narrowing of options, we have developed 16 questions, as follows: · What are the AFCI program goals? · Which potential waste disposition approaches do we plan for? · What are the major separations, transmutation, and fuel options? · How do we address proliferation resistance? · Which potential energy futures do we plan for? · What potential external triggers do we plan for? · Should we separate uranium? · If we separate uranium, should we recycle it, store it or dispose of it? · Is it practical to plan to fabricate and handle “hot” fuel? · Which transuranic elements (TRU) should be separated and transmuted? · Of those TRU separated, which should be transmuted together? · Should we separate and/or transmute Cs and Sr isotopes that dominate near-term repository heating? · Should we separate and/or transmute very long-lived Tc and I isotopes? · Which separation technology? · What mix of transmutation technologies? · What fuel technology best supports the above decisions?

Steven J. Piet; Brent W. Dixon; J. Stephen Herring; David E. Shropshire; Mary Lou Dunzik-Gougar

2003-10-01T23:59:59.000Z

282

Fuel Cycle System Analysis Handbook  

Science Conference Proceedings (OSTI)

This Handbook aims to improve understanding and communication regarding nuclear fuel cycle options. It is intended to assist DOE, Campaign Managers, and other presenters prepare presentations and reports. When looking for information, check here. The Handbook generally includes few details of how calculations were performed, which can be found by consulting references provided to the reader. The Handbook emphasizes results in the form of graphics and diagrams, with only enough text to explain the graphic, to ensure that the messages associated with the graphic is clear, and to explain key assumptions and methods that cause the graphed results. Some of the material is new and is not found in previous reports, for example: (1) Section 3 has system-level mass flow diagrams for 0-tier (once-through), 1-tier (UOX to CR=0.50 fast reactor), and 2-tier (UOX to MOX-Pu to CR=0.50 fast reactor) scenarios - at both static and dynamic equilibrium. (2) To help inform fast reactor transuranic (TRU) conversion ratio and uranium supply behavior, section 5 provides the sustainable fast reactor growth rate as a function of TRU conversion ratio. (3) To help clarify the difference in recycling Pu, NpPu, NpPuAm, and all-TRU, section 5 provides mass fraction, gamma, and neutron emission for those four cases for MOX, heterogeneous LWR IMF (assemblies mixing IMF and UOX pins), and a CR=0.50 fast reactor. There are data for the first 10 LWR recycle passes and equilibrium. (4) Section 6 provides information on the cycle length, planned and unplanned outages, and TRU enrichment as a function of fast reactor TRU conversion ratio, as well as the dilution of TRU feedstock by uranium in making fast reactor fuel. (The recovered uranium is considered to be more pure than recovered TRU.) The latter parameter impacts the required TRU impurity limits specified by the Fuels Campaign. (5) Section 7 provides flows for an 800-tonne UOX separation plant. (6) To complement 'tornado' economic uncertainty diagrams, which show at a glance combined uncertainty information, section 9.2 has a new set of simpler graphs that show the impact on fuel cycle costs for once through, 1-tier, and 2-tier scenarios as a function of key input parameters.

Steven J. Piet; Brent W. Dixon; Dirk Gombert; Edward A. Hoffman; Gretchen E. Matthern; Kent A. Williams

2009-06-01T23:59:59.000Z

283

Battery charging in float vs. cycling environments  

SciTech Connect

In lead-acid battery systems, cycling systems are often managed using float management strategies. There are many differences in battery management strategies for a float environment and battery management strategies for a cycling environment. To complicate matters further, in many cycling environments, such as off-grid domestic power systems, there is usually not an available charging source capable of efficiently equalizing a lead-acid battery let alone bring it to a full state of charge. Typically, rules for battery management which have worked quite well in a floating environment have been routinely applied to cycling batteries without full appreciation of what the cycling battery really needs to reach a full state of charge and to maintain a high state of health. For example, charge target voltages for batteries that are regularly deep cycled in off-grid power sources are the same as voltages applied to stand-by systems following a discharge event. In other charging operations equalization charge requirements are frequently ignored or incorrectly applied in cycled systems which frequently leads to premature capacity loss. The cause of this serious problem: the application of float battery management strategies to cycling battery systems. This paper describes the outcomes to be expected when managing cycling batteries with float strategies and discusses the techniques and benefits for the use of cycling battery management strategies.

COREY,GARTH P.

2000-04-20T23:59:59.000Z

284

Organization | Department of Energy  

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

Organization Leadership Organization Contact Us The Office of Economic Impact and Diversity is comprised of six offices: The Office of the Director- contact us Office of...

285

SSRL Users' Organization Ballot  

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

2003 SSRL Users' Organization Executive Committee (SSRLUO-EC) Ballot The SSRL Users' Organization Executive Committee represents the scientific user community to the SSRL...

286

Business cycles in oil economies  

SciTech Connect

This study examines the impact of oil price shocks on output fluctuations of several oil-exporting economies. In most studies of business cycles, the role of oil price is ignored; the few studies that use oil price as one of the variables in the system focus on modeling oil-importing economies. The vector autoregression (VAR) technique is used to consider the cases of Norway, Nigeria, and Mexico. Both atheoretical and structural' VARs are estimated to determine the importance of oil price impulses on output variations. The study reports two types of results: variance decomposition and impulse response functions, with particular emphasis on the issues of stationarity and co-integration among the series. The empirical results suggest that shocks to oil price are important in explaining output variations. In most cases, shocks to oil price are shown to explain more than 20% of the forecast variance of output over a 40-quarter horizon.

Al-Mutairi, N.H.

1991-01-01T23:59:59.000Z

287

Pennsylvania life cycle costing manual  

SciTech Connect

Until the 1970s, it was commonplace for institutions and governments to purchase equipment based on lowest initial (first) costs. Recurring costs such as operational, maintenance, and energy costs often were not considered in the purchase decision. If an agency wanted to buy something, it published specifications and requested bids from several manufacturers. Often, the lowest bidder who met the specifications won the job, with no consideration given to the economic life of the equipment or yearly recurring costs such as energy and maintenance costs. The practice of purchasing based on lowest initial costs probably did not make good economic sense prior to 1970, and it certainly does not make good sense now. The wise person will consider all costs and benefits associated with a purchase, both initial and post-purchase, in order to make procurement decisions that are valid for the life of the equipment. This describes a method of financial analysis that considers all pertinent costs: life cycle costing (LCC).

1996-02-01T23:59:59.000Z

288

Efficiency combined cycle power plant  

SciTech Connect

This patent describes a method of operating a combined cycle power plant. It comprises: flowing exhaust gas from a combustion turbine through a heat recovery steam generator (HRSG); flowing feed water through an economizer section of the HRSG at a flow rate and providing heated feed water; flowing a first portion of the heated feed water through an evaporator section of the HRSG and producing saturated steam at a production rate, the flow rate of the feed water through the economizer section being greater than required to sustain the production rate of steam in the evaporator section; flowing fuel for the turbine through a heat exchanger; and, flowing a second portion of the heated feed water provided by the economizer section through the heat exchanger then to an inlet of the economizer section, thereby heating the fuel flowing through the heat exchanger.

Pavel, J.; Meyers, G.A.; Baldwin, T.S.

1990-06-12T23:59:59.000Z

289

MHD Integrated Topping Cycle Project  

DOE Green Energy (OSTI)

This seventeenth quarterly technical progress report of the MHD Integrated Topping Cycle Project presents the accomplishments during the period August 1, 1991 to October 31, 1991. Manufacturing of the prototypical combustor pressure shell has been completed including leak, proof, and assembly fit checking. Manufacturing of forty-five cooling panels was also completed including leak, proof, and flow testing. All precombustor internal components (combustion can baffle and swirl box) were received and checked, and integration of the components was initiated. A decision was made regarding the primary and backup designs for the 1A4 channel. The assembly of the channel related prototypical hardware continued. The cathode wall electrical wiring is now complete. The mechanical design of the diffuser has been completed.

Not Available

1992-07-01T23:59:59.000Z

290

CX-002111: Categorical Exclusion Determination | Department of Energy  

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

11: Categorical Exclusion Determination 11: Categorical Exclusion Determination CX-002111: Categorical Exclusion Determination Optimization of Hybrid-Water/Air-Cooled Condenser In an Enhanced Turbine Geothermal Organic Rankine Cycle System CX(s) Applied: B3.6, A9 Date: 05/05/2010 Location(s): East Hartford, CT Office(s): Energy Efficiency and Renewable Energy, Golden Field Office United Technologies Research Center (UTRC) would develop a hybrid water/air cooled condenser and an enhanced turbine for geothermal-based Organic Rankine Cycle (ORC) power production systems. Project work would take place in three locations: UTRC's ORC lab in East Hartford, CT; the Power plant laboratory at Chena Hot Springs Resort in Alaska; and the Mechanical Engineering Laboratory at the University of Illinois at Urbana-Champaign.

291

Solar thermal electric power systems with line-focus collectors. Final report  

DOE Green Energy (OSTI)

Electric power generation by conventional Rankine cycle heat engines with heat supplied by line-focus solar collectors was investigated. The objectives of the study were: (1) determine which of four types of line-focus solar collectors coupled with turbine-generators of conventional design has the potential to produce low-cost electric power with thermal energy in 100 to 300/sup 0/C range; (2) develop performance and cost relationships for organic Rankine cycle engines for power generation capacities from 3 MW/sub e/ to 300 MW/sub e/; (3) develop conceptual storage units for organic fluid systems. Evaluation procedures and study results and conclusion are presented and discussed in detail. (WHK)

Duff, W.S.; Karaki, S.; Shaner, W.W.; Wilbur, P.J.; Somers, E.V.; Grimble, R.E.; Wilson, H.S.; Watt, A.D.

1978-12-01T23:59:59.000Z

292

The Seasonal Cycle over the United States and Mexico  

Science Conference Proceedings (OSTI)

The annual cycle occupies a unique position in the spectra of meteorological time series. This cycle and its first three harmonics are extracted from the series as a seasonal cycle. The distributions of the annual and seasonal cycles are studied ...

Vernon E. Kousky; S. Srivatsangam

1983-01-01T23:59:59.000Z

293

Nuclear Fuel Cycle | Department of Energy  

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

Cycle Cycle Nuclear Fuel Cycle This is an illustration of a nuclear fuel cycle that shows the required steps to process natural uranium from ore for preparation for fuel to be loaded in nuclear reactors. This is an illustration of a nuclear fuel cycle that shows the required steps to process natural uranium from ore for preparation for fuel to be loaded in nuclear reactors. The mission of NE-54 is primarily focused on activities related to the front end of the nuclear fuel cycle which includes mining, milling, conversion, and enrichment. Uranium Mining Both "conventional" open pit, underground mining, and in situ techniques are used to recover uranium ore. In general, open pit mining is used where deposits are close to the surface and underground mining is used

294

NREL: Energy Analysis - Life Cycle Assessment Harmonization  

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

Life Cycle Assessment Harmonization Life Cycle Assessment Harmonization Life Cycle Greenhouse Gas Emissions from Electricity Generation (Fact Sheet) Cover of the Life Cycle Greenhouse Gas Emissions from Electricity Generation factsheet Download the Fact Sheet The U.S. Department of Energy enlisted NREL to review and "harmonize" life cycle assessments (LCA) of electricity generation technologies. Hundreds of assessments have been published, often with considerable variability in results. These variations in approach, while usually legitimate, hamper comparison across studies and pooling of published results. Learn more about life cycle assessments of energy technologies. By harmonizing this data, NREL seeks to reduce the uncertainty around estimates for environmental impacts of renewables and increase the value of

295

Definition: Thermodynamic cycle | Open Energy Information  

Open Energy Info (EERE)

Thermodynamic cycle Thermodynamic cycle Jump to: navigation, search Dictionary.png Thermodynamic cycle A process in which a fluid (water, air, ammonia, etc) successively changes state (from a liquid to a gas and back to a liquid) for the purpose of producing or transferring energy.[1] View on Wikipedia Wikipedia Definition A thermodynamic cycle consists of a collection of thermodynamic processes transferring heat and work, while varying pressure, temperature, and other state variables, eventually returning a system to its initial state. In the process of going through this cycle, the system may perform work on its surroundings, therefore acting as a heat engine. State quantities depend only on the thermodynamic state, and cumulative variation of such properties adds up to zero during a cycle. Process quantities (or

296

Graph Invariants and Large Cycles - a Survey  

E-Print Network (OSTI)

Graph invariants are the best and single tools for investigation of abstract structures of graphs. They, combined in convenient relations, carry global and general information about a graph and its various substructures (cycle structures, factors, colorings, coverings, and so on). In this survey paper we have attempted to bring together all direct (pure) relations between basic invariants of a graph and its large cycle structures, perhaps the most important cycle structures, namely Hamilton, longest, dominating and some generalized cycles including Hamilton and dominating cycles as special cases. These very few relations actually form a source (basis) from which nearly all possible hamiltonian results can be developed further based on generalized and extended invariants, extended list of path or cycle structures and additional structural limitations.

Nikoghosyan, Zh G

2010-01-01T23:59:59.000Z

297

Proceedings: 1990 Fossil Plant Cycling Conference  

Science Conference Proceedings (OSTI)

With the prospect of much new baseload generation from independent power producers and other qualifying facilities, the cycling capability of utility fossil-fired units originally designed for baseload operation is an ongoing concern. The 30 papers presented at EPRI's fourth cycling conference offer new insights into unit condition and life assessment, conversion, operation, and control as well as some storage-based alternatives to cycling.

1992-02-01T23:59:59.000Z

298

On the cycle structure of permutation polynomials  

Science Conference Proceedings (OSTI)

Any permutation of a finite field F"q can be represented by a polynomial P"n(x)=(...+((a"0x+a"1)^q^-^2+a"2)^q^-^2+...+a"n)^q^-^2+a"n"+"1, for some n>=0. P"0 is linear and the cycle structure of P"1 is known. In this work we present the cycle structure ... Keywords: Cycle structure, Inversive generators, Permutation polynomials of finite fields

AyçA ÇE?Melio?Lu; Wilfried Meidl; Alev Topuzo?Lu

2008-07-01T23:59:59.000Z

299

Heat Recovery Steam Generator Cycle Chemistry Instrumentation  

Science Conference Proceedings (OSTI)

Effective monitoring of the purity of water and steam is an integral part of any productive cycle chemistry monitoring program. The Electric Power Research Institute's (EPRI's) heat recovery steam generator (HRSG) cycle chemistry guidelines identified a group of core monitoring parameters that are considered the minimum requirements. Meeting these requirements is part of EPRI's cycle chemistry benchmarking criteria for HRSGs. In addition to the core parameters, many chemistry parameters might need to be ...

2010-11-19T23:59:59.000Z

300

Trends, Cycles, and Kinks - Energy Information Administration  

U.S. Energy Information Administration (EIA)

... Historical trends Recent cycle Kinks or shifts in trends Refinery Utilization Grew with Demand ... Across the year, ... Costs for construction were ...

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


301

Duke Energy's Edwardsport Integrated Gasification Combined Cycle...  

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

Duke Energy's Edwardsport Integrated Gasification Combined Cycle (IGCC) Station presently under construction in Knox County, Indiana. (Photos courtesy of Duke Energy.) Gasification...

302

PCM energy storage during defective thermal cycling.  

E-Print Network (OSTI)

??Incomplete thermal cycling affects storage capacities of phase change materials (PCMs). Existing PCM measuring methods are presented with their drawbacks. A new device named “the… (more)

Koekenbier, S.F.

2011-01-01T23:59:59.000Z

303

Essays on consumption cycles and corporate finance  

E-Print Network (OSTI)

and the consumption cycle . . . . . . . . . . . . .3.1.6 Optimal consumption, expenditures and1.3.2 Optimal nondurable consumption and durable

Issler, Paulo Floriano

2013-01-01T23:59:59.000Z

304

Tropical Cloud Life Cycle and Overlap Structure  

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

Tropical Cloud Life Cycle and Overlap Structure Vogelmann, Andrew Brookhaven National Laboratory Jensen, Michael Brookhaven National Laboratory Kollias, Pavlos Brookhaven National...

305

Automotive Magnesium Applications and Life Cycle Environmental ...  

Science Conference Proceedings (OSTI)

Jan 22, 2008 ... Life cycle energies and emissions are compared for steel, aluminum and ... 3rd International Conference on SF6 and the Environment, 2004.

306

MULTIPARAMETER OPTIMIZATION STUDIES ON GEOTHERMAL ENERGY CYCLES  

E-Print Network (OSTI)

~Iilora and J. W. Tester, Geothermal Energy as a Source ofpresented at the Susanville Geothermal Energy Converence,of Practical Cycles for Geothermal Power Plants." General

Pope, W.L.

2011-01-01T23:59:59.000Z

307

Fuel Cycle Research and Development Presentation Title  

Science Conference Proceedings (OSTI)

Separations and Waste Form. Campaign Objectives. ?Develop the next generation of fuel cycle separation and waste management technologies that enable a.

308

Variable pressure power cycle and control system  

DOE Patents (OSTI)

A variable pressure power cycle and control system that is adjustable to a variable heat source is disclosed. The power cycle adjusts itself to the heat source so that a minimal temperature difference is maintained between the heat source fluid and the power cycle working fluid, thereby substantially matching the thermodynamic envelope of the power cycle to the thermodynamic envelope of the heat source. Adjustments are made by sensing the inlet temperature of the heat source fluid and then setting a superheated vapor temperature and pressure to achieve a minimum temperature difference between the heat source fluid and the working fluid.

Goldsberry, Fred L. (Spring, TX)

1984-11-27T23:59:59.000Z

309

2012 Fuel Cycle MPACT Working Group  

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

meeting is to review findings and help advance research and development in the Fuel Cycle Materials Protection, Accounting and Control Technologies area. It will include a campaign...

310

Organic Electronics: Organic thin-film magnetometers  

SciTech Connect

Magnetometry usually requires large probes and bulky instrumentation. Organic diodes have now been used in small probes that can measure moderate magnetic fields with 10 ppm precision.

Shinar, Joseph

2012-07-24T23:59:59.000Z

311

Transportation Organization and Functions  

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

Office of Packaging and Transportation list of organizations and functions, with a list of acronyms.

312

TREC Organization User Agreement  

Science Conference Proceedings (OSTI)

Organization Application to use the TREC Information- Retrieval Text Research Collections. The _____ ...

313

Standards Development Organization Overview  

Science Conference Proceedings (OSTI)

... Standards Organizations NFPA (National Fire Protection Association) ... Fire News – Annual directory – NFPA Buyer's Guide ... Headquarters ...

2010-04-28T23:59:59.000Z

314

Green Building- Efficient Life Cycle  

E-Print Network (OSTI)

Energy saving does not just apply to traffic, production or agriculture. Buildings are also contributing to the climate change. The focus here is on the energy they use and on their CO2 emissions. Each year, Siemens invests more than two billion euros in the appropriate research and development. For customers, this means that Siemens is already providing them with energy efficient solutions that save resources and reduce emissions. Siemens Real Estate (SRE) has taken on the task of ensuring that Siemens AG will become 20 percent more energy efficient by 2011, and it has turned an efficiency program for existing real estate, which has been in existence since 2005, into an integrated green building initiative. This initiative comprises the components “Sustainable Building Design”, “Life Cycle Cost Analysis”, “Green Building Certification” and “Natural Resources Management”. These components are deliberately arranged around the life cycle of the real estate concerned. This allows a different emphasis to be placed on the different questions in each project phase and each phase of a building’s life and for them to be answered in a targeted manner. “Sustainable Building Design” comes into effect during the tasking and preliminary planning phase of a building project; and, by providing a specially developed sustainability manual, it helps with the definition of target values and the drawing up of efficiency strategies for the planning of the building. The manual epitomizes, and sets out clearly, the attitude of SRE to all building-specific sustainability matters. In addition, it is used in the offering of rewards for project competitions. As a result, through a selection of different energy-efficiency measures that have been roughly conceived beforehand, the primary energy consumption can already be restricted in the project definition phase. “Life Cycle Cost Analysis” comes into effect when the blueprint for buildings is being drawn up. Up to now, when components and systems were being chosen, the main focus was usually on the investment costs involved. By using a cost tool developed specifically to meet the needs of the company, SRE will in future be able to estimate the component-specific utilization costs – such as cleaning, maintenance, and the use of energy – at an early planning stage. “Green Building Certification” is used in building projects during the planning and implementation phase, and it thus ensures the quality of the new real estate over the long term. Siemens is implementing the Green Building Program of the European Commission in new building projects and renovation work in EU countries. In all other countries that are not taking part in the EU Green Building Program, SRE uses certification in accordance with LEED (Leadership in Energy and Environmental Design). In the LEED certification, a transparent and easy-to-use catalog of criteria is employed to make an assessment of the use of energy and other aspects of sustainability, such as the selection of the plot of land, the efficient use of water, the quality of air within buildings, and the selection of materials. This ensures that a neutral and independent assessment is made of all new building and large-scale renovation projects. The action program “Natural Resources Management” rounds off the range of measures in the area of existing real estate. The aim of the program is to identify and highlight all latent efficiency potential in existing buildings. This includes, for instance, modernizing the control equipment used for the heating and ventilation systems. This entails replacing electrical power units with more efficient models, and retrofitting fans and pumps with frequency converters. Sixty buildings have now been inspected, and savings of almost eight million Euros have been achieved. The average payback period is less than two years. One example of this is an old Siemens building from the 1970s at the Munich-Perlach site. Through energy optimization, it has been possible to cu

Kohns, R.

2008-10-01T23:59:59.000Z

315

Low Level Heat Recovery Technology  

E-Print Network (OSTI)

With today's high fuel prices, energy conservation projects to utilize low level waste heat have become more attractive. Exxon Chemical Company Central Engineering has been developing guidelines and assessing the potential for application of low level heat recovery technology. This paper discusses heat distribution systems, latest developments in absorption refrigeration and organic Rankine cycles, and pressure, minimization possibilities. The relative merits and economics of the various possibilities and some guidelines on when they should be considered will be presented.

O'Brien, W. J.

1982-01-01T23:59:59.000Z

316

Fuzzy Bayesian validation for cluster analysis of yeast cell-cycle data  

Science Conference Proceedings (OSTI)

Clustering for the analysis of the genes organizes the patterns into groups by the similarity of the dataset and has been used for identifying the functions of the genes in the cluster and analyzing the functions of unknown genes. Since the genes usually ... Keywords: Fuzzy Bayesian validation method, Fuzzy c-means algorithm, Fuzzy clustering, Yeast cell-cycle data

Sung-Bae Cho; Si-Ho Yoo

2006-12-01T23:59:59.000Z

317

Building and Fire Publications  

Science Conference Proceedings (OSTI)

... economizer; ejector; liquid-line/suction-line heat exchanger; Rankine cycle; vapor ... are minimized: the liquid-line/suction-line heat exchange (llsl-hx ...

318

Building and Fire Publications  

Science Conference Proceedings (OSTI)

... conditioning; ejector; liquid-line/suction-line heat exchange; Rankine cycle ... incorporating a liquid-line/suction-line heat exchanger, economizer, or ...

319

A Review of Hazardous Chemical Species Associated with CO2 Capture from Coal-Fired Power Plants and Their Potential Fate in CO2 Geologic Storage  

E-Print Network (OSTI)

with conventional steam turbine powered electric generation.used to boil water for steam turbine generation as a secondturbine) and Rankine (steam turbine) cycles, as illustrated

Apps, J.A.

2006-01-01T23:59:59.000Z

320

Experimental and Analytical Studies on Pyroelectric Waste Heat Energy Conversion  

E-Print Network (OSTI)

Rankine cycles and Stirling engines have been utilized to14, 15]. Particularly, Stirling engines have been used in a18]. Theoret- ically, Stirling engines can achieve Carnot e?

Lee, Felix

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "organic rankine cycle" 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

A Better Steam Engine: Designing a Distributed Concentrating Solar Combined Heat and Power System  

E-Print Network (OSTI)

Figures A typical wet steam Rankine cycle on a temperature-A Better Steam Engine: Designing a Distributed Concentrating2011 Abstract A Better Steam Engine: Designing a Distributed

Norwood, Zachary Mills

2011-01-01T23:59:59.000Z

322

Not-In-Kind Technologies for Residential and Commercial Unitary  

E-Print Network (OSTI)

. . . . . . . . . . . . . . . . . . . . . . 88 FUEL CELL POWERED RANKINE CYCLE 26. Fuel Cell Technologies (Lloyd 1999) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 Table 27. Calculated and Observed Efficiencies for Fuel Cell Powered Heat Pumps

Oak Ridge National Laboratory

323

Assessment of the type of cycling infrastructure required to attract new  

Open Energy Info (EERE)

Assessment of the type of cycling infrastructure required to attract new Assessment of the type of cycling infrastructure required to attract new cyclists Jump to: navigation, search Tool Summary Name: Assessment of the type of cycling infrastructure required to attract new cyclists Agency/Company /Organization: New Zealand Transport Agency Focus Area: Non-Motorized Transport Topics: Analysis Tools Complexity/Ease of Use: Not Available Website: www.nzta.govt.nz/resources/research/reports/449/ Transport Toolkit Region(s): Australia/North America Related Tools Petroleum Reduction Planning Tool New Videos: Stories of Auto-Rickshaws in India Ethanol Usage in Urban Public Transportation - Presentation of Results ... further results Find Another Tool FIND TRANSPORTATION TOOLS Investigated what type of cycling infrastructure would encourage 'new

324

Reprocessing in breeder fuel cycles  

SciTech Connect

Over the past decade, the United States has developed plans and carried out programs directed toward the demonstration of breeder fuel reprocessing in connection with early breeder demonstration reactors. Although subject to continuing debate, progress continued on the construction of the Clinch River Breeder Reactor (CRBR) with startup anticipated near the end of this decade, while plans for the CRBR and its associated fuel cycle are still being firmed up, the basic R and D programs required to carry out the demonstrations have continued. Policies call for breeder recycle to begin in the early to mid-1990s. An important objective of the reprocessing program is to develop advanced technology for the recovery of fissile materials in systems that minimize environmental emissions and doses to plant workers, and that also provide effective fissile material safeguards. Major improvements include technology for remote operation and maintenance, low-flow ventilation systems coupled with more effective off-gas treatment, and advanced process monitoring for control and safeguards.

Burch, W.D.; Groenier, W.S.

1983-06-01T23:59:59.000Z

325

Reprocessing in breeder fuel cycles  

Science Conference Proceedings (OSTI)

Over the past decade, the United States has developed plans and carried out programs directed toward the demonstration of breeder fuel reprocessing in connection with the first breeder demonstration reactor. A renewed commitment to moving forward with the construction of the Clinch River Breeder Reactor (CRBR) has been made, with startup anticipated near the end of this decade. While plans for the CRBR and its associated fuel cycle are still being firmed up, the basic research and development programs required to carry out the demonstrations have continued. This paper updates the status of the reprocessing plans and programs. Policies call for breeder recycle to begin in the early to mid-1990's. Contents of this paper are: (1) evolving plans for breeder reprocessing (demonstration reprocessing plant, reprocessing head-end colocated at an existing facility); (2) relationship to LWR reprocessing; (3) integrated equipment test (IET) facility and related hardware development activities (mechanical considerations in shearing and dissolving, remote operations and maintenance demonstration phase of IET, integrated process demonstration phase of IET, separate component development activities); and (4) supporting process R and D.

Burch, W.D.; Groenier, W.S.

1982-01-01T23:59:59.000Z

326

Open cycle - OTEC turbine design  

Science Conference Proceedings (OSTI)

The design of a low-pressure, open cycle ocean thermal energy conversion system (OTEC) is described. Near-surface ocean water at 80 F is allowed to expand in a one-half psi evaporator for passage through a turbine cold water (40 F), pumped upward from a 3,000 ft depth, is used to recondense the steam. Plans for a 2.5-3 MWe prototype plant, as a proof-of-principle project for a 100 MWe plant, include seawater pumps driven off the generator shaft, potable water as a by-product of the condensor, ease of access for O and M, and an integrated, gear-driven deaerator system with reinjection into the warm seawater discharge. An inlet flow of 3,000,000 cu ft/sec, a single stage vertical turbine with 40 ft fiber reinforced composite blades, 200 rpm operation on a 65 ft diameter disk, and an overall efficiency of 3% are features of the 100 MWe plant. A flowfield analysis, a velocity triangle analysis, and a structural dynamics analysis are outlined, along with materials applications and manufacturing process considerations in blade design. The 3MWe OTEC will be one-sixth the size of a 100MWe OTEC.

Coleman, W.H. (Westinghouse Electric Corp., Lester, PA); Rogers, J.D. (TM Development, Inc., Chester, PA); Thompson, D.F. (Delaware University, Newark, DE)

1981-01-01T23:59:59.000Z

327

MHD Integrated Topping Cycle Project  

DOE Green Energy (OSTI)

This fourteenth quarterly technical progress report of the MHD Integrated Topping Cycle Project presents the accomplishments during the period November 1, 1990 to January 31, 1991. Testing of the High Pressure Cooling Subsystem electrical isolator was completed. The PEEK material successfully passed the high temperature, high pressure duration tests (50 hours). The Combustion Subsystem drawings were CADAM released. The procurement process is in progress. An equipment specification and RFP were prepared for the new Low Pressure Cooling System (LPCS) and released for quotation. Work has been conducted on confirmation tests leading to final gas-side designs and studies to assist in channel fabrication.The final cathode gas-side design and the proposed gas-side designs of the anode and sidewall are presented. Anode confirmation tests and related analyses of anode wear mechanisms used in the selection of the proposed anode design are presented. Sidewall confirmation tests, which were used to select the proposed gas-side design, were conducted. The design for the full scale CDIF system was completed. A test program was initiated to investigate the practicality of using Avco current controls for current consolidation in the power takeoff (PTO) regions and to determine the cause of past current consolidation failures. Another important activity was the installation of 1A4-style coupons in the 1A1 channel. A description of the coupons and their location with 1A1 channel is presented herein.

Not Available

1992-02-01T23:59:59.000Z

328

Generation of high power single-cycle and multiple-cycle terahertz pulses  

E-Print Network (OSTI)

In this thesis, we present experimental methods and results of tabletop generation of high power single-cycle and frequency-tunable multiple-cycle terahertz (THz) pulses pumped with near-infrared ultrashort optical pulses ...

Chen, Zhao, S.M. Massachusetts Institute of Technology. Department of Chemistry

2013-01-01T23:59:59.000Z

329

Microbial Carbon Cycling in Permafrost-Affected Soils  

Science Conference Proceedings (OSTI)

The Arctic plays a key role in Earth s climate system as global warming is predicted to be most pronounced at high latitudes and because one third of the global carbon pool is stored in ecosystems of the northern latitudes. In order to improve our understanding of the present and future carbon dynamics in climate sensitive permafrost ecosystems, present studies concentrate on investigations of microbial controls of greenhouse gas fluxes, on the activity and structure of the involved microbial communities, and on their response to changing environmental conditions. Permafrost-affected soils can function as both a source and a sink for carbon dioxide and methane. Under anaerobic conditions, caused by flooding of the active layer and the effect of backwater above the permafrost table, the mineralization of organic matter can only be realized stepwise by specialized microorganisms. Important intermediates of the organic matter decomposition are hydrogen, carbon dioxide and acetate, which can be further reduced to methane by methanogenic archaea. Evolution of methane fluxes across the subsurface/atmosphere boundary will thereby strongly depend on the activity of anaerobic methanogenic archaea and obligately aerobic methane oxidizing proteobacteria, which are known to be abundant and to significantly reduce methane emissions in permafrost-affected soils. Therefore current studies on methane-cycling microorganisms are the object of particular attention in permafrost studies, because of their key role in the Arctic methane cycle and consequently of their significance for the global methane budget.

Vishnivetskaya, T. [University of Tennessee, Knoxville (UTK); Liebner, Susanne [University of Tromso, Norway; Wilhelm, Ronald [McGill University, Montreal, Quebec; Wagner, Dirk [Alfred Wegener Institute for Polar and Marine Research, Potsdam, Germany

2011-01-01T23:59:59.000Z

330

Classifying Proximity Soundings with Self-Organizing Maps toward Improving Supercell and Tornado Forecasting  

Science Conference Proceedings (OSTI)

The self-organizing map (SOM) statistical technique is applied to vertical profiles of thermodynamic and kinematic parameters from a Rapid Update Cycle-2 (RUC-2) proximity sounding dataset with the goal of better distinguishing and predicting ...

Christopher J. Nowotarski; Anders A. Jensen

2013-06-01T23:59:59.000Z

331

A Description of the Madden–Julian Oscillation Based on a Self-Organizing Map  

Science Conference Proceedings (OSTI)

This study introduces a nonlinear clustering technique based on a self-organizing map (SOM) algorithm to identify horizontal and vertical structures of the Madden–Julian oscillation (MJO) through its life cycle. The SOM description of the MJO does ...

Rajib Chattopadhyay; Augustin Vintzileos; Chidong Zhang

2013-03-01T23:59:59.000Z

332

Carbon oxidation state as a metric for describing the chemistry of atmospheric organic aerosol  

E-Print Network (OSTI)

A detailed understanding of the sources, transformations and fates of organic species in the environment is crucial because of the central roles that they play in human health, biogeochemical cycles and the Earth's climate. ...

Kroll, Jesse

333

A Parametric Wind-Pressure Relationship for Rankine vs. Non-Rankine Cyclostrophic Vortices  

Science Conference Proceedings (OSTI)

A parametric tangential wind profile model is presented for depicting representative pressure deficit profiles corresponding to varying tangential wind profiles of a cyclostrophic, axisymmetric vortex. The model employs five key parameters per ...

Vincent T. Wood; Luther W. White

334

Hybrid Cycles with Hydrogen as Fuel  

Science Conference Proceedings (OSTI)

The gas turbine and steam turbine combined cycle fueled with hydrogen have an overall high efficiency. The virtues of the supercritical steam turbine, the high temperature gas turbine and the low pressure steam turbine are fully expressed in this system. ... Keywords: gas turbine, new energy, combined cycle, hydrogen energy, thermal efficiency, energy conversion

Jing Rulin; Xu Hong; Hu Sangao; Gao Dan; Guo Xiaodan; Ni Weidou

2009-10-01T23:59:59.000Z

335

Fuel cycles for the 80's  

SciTech Connect

Papers presented at the American Nuclear Society's topical meeting on the fuel cycle are summarized. Present progress and goals in the areas of fuel fabrication, fuel reprocessing, spent fuel storage, accountability, and safeguards are reported. Present governmental policies which affect the fuel cycle are also discussed. Individual presentations are processed for inclusion in the Energy Data Base.(DMC)

Not Available

1980-01-01T23:59:59.000Z

336

Simulation and optimization of Westinghouse cycles  

Science Conference Proceedings (OSTI)

Nowadays, hydrogen is industrially produced mainly from fossil fuels by natural gas steam reforming, coal gasification and as by-product of naphtha reforming. Next step of research topic of hydrogen production from renewable sources is utilization of ... Keywords: Westinghouse cycle, hydrogen production, water splitting thermo-chemical cycles

Miroslava Smitkova; Frantisek Janí?ek

2008-05-01T23:59:59.000Z

337

Status of IFR fuel cycle demonstration  

SciTech Connect

The next major step in Argonne`s Integral Fast Reactor (IFR) Program is demonstration of the pyroprocess fuel cycle, in conjunction with continued operation of EBR-II. The Fuel Cycle Facility (FCF) is being readied for this mission. This paper will address the status of facility systems and process equipment, the initial startup experience, and plans for the demonstration program.

Lineberry, M.J.; Phipps, R.D.; McFarlane, H.F.

1993-09-01T23:59:59.000Z

338

Uncertainty Analyses of Advanced Fuel Cycles  

SciTech Connect

The Department of Energy is developing technology, experimental protocols, computational methods, systems analysis software, and many other capabilities in order to advance the nuclear power infrastructure through the Advanced Fuel Cycle Initiative (AFDI). Our project, is intended to facilitate will-informed decision making for the selection of fuel cycle options and facilities for development.

Laurence F. Miller; J. Preston; G. Sweder; T. Anderson; S. Janson; M. Humberstone; J. MConn; J. Clark

2008-12-12T23:59:59.000Z

339

Fuel cycle problems in fusion reactors  

SciTech Connect

Fuel cycle problems of fusion reactors evolve around the breeding, recovery, containment, and recycling of tritium. These processes are described, and their implications and alternatives are discussed. Technically, fuel cycle problems are solvable; economically, their feasibility is not yet known. (auth)

Hickman, R.G.

1976-01-13T23:59:59.000Z

340

Solar cycle changes in coronal holes and space weather cycles J. G. Luhmann,1  

E-Print Network (OSTI)

Solar cycle changes in coronal holes and space weather cycles J. G. Luhmann,1 Y. Li,1 C. N. Arge,2-heliolatitude solar wind over approximately the last three solar cycles. Related key parameters like interplanetary explain solar magnetic field control of long-term interplanetary variations. In particular, the enduring

California at Berkeley, University of

Note: This page contains sample records for the topic "organic rankine cycle" 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

Cycle Chemistry Guidelines for Combined Cycle/Heat Recovery Steam Generators (HRSGs)  

Science Conference Proceedings (OSTI)

The cycle chemistry in combined cycle plants influences about 70 of the heat recovery steam generator (HRSG) tube failure mechanisms. These guidelines have been assembled to assist operators and chemists in developing an effective overall cycle chemistry program which will prevent HRSG tube failures (HTF).

2006-03-09T23:59:59.000Z

342

Cycling, Startup, Shutdown, and Layup Fossil Plant Cycle Chemistry Guidelines for Operators and Chemists  

Science Conference Proceedings (OSTI)

The purity of water and steam is central to ensuring fossil plant component availability and reliability. Complete optimization of cycle chemistry requires protection of the steam-water cycle during the shutdown, layup, and startup phases of operation. These guidelines will assist utilities in developing cycle chemistry guidelines for all transient operations and shutdowns.

2009-03-31T23:59:59.000Z

343

Metracker version 1.5: Life-cycle performance metricstracking  

SciTech Connect

Buildings often do not perform as well in practice as expected during pre-design planning, nor as intended at the design stage, nor even as measured during commissioning and maintenance operations. While this statement is generally considered to be true, it is difficult to quantify the impacts and long-term economic implications of a building in which performance does not meet expectations. This leads to a building process that is devoid of quantitative feedback that could be used to detect and correct problems both in an individual building and in the building process itself. A key element in this situation is the lack of a standardized method for documenting and communicating information about the intended and actual performance of a building. This deficiency leads to several shortcomings in the life-cycle management of building information. Planners have no means of clearly specifying their expectations. Designers do not concisely document their design intent. Commissioning personnel have no standardized method for documenting the results of performance testing. Post-occupancy building performance cannot readily be compared to expectations in an attempt to evaluate and improve design and operation decisions. Lastly, without quantification of the magnitude of performance problems it is difficult to motivate building process participants to alter their current practice. This document describes an information management concept and a prototype tool based on this concept that has been developed to address this situation. The Building Life-cycle Information System (BLISS) has been designed to manage a wide range of building related information across the life cycle of a building project. Metracker is a prototype implementation of BLISS based on the International Alliance for Interoperability's (IAI) Industry Foundation Classes (IFC). The IFC is an evolving data model under development by a variety of architectural, engineering, and construction (AEC) industry firms and organizations (IAI, 2001). Metracker has been developed to demonstrate and explore the process of tracking performance metrics across the building life cycle.

Hitchcock, Robert J.

2002-01-17T23:59:59.000Z

344

Moving toward multilateral mechanisms for the fuel cycle  

Science Conference Proceedings (OSTI)

Multilateral mechanisms for the fuel cycle are seen as a potentially important way to create an industrial infrastructure that will support a renaissance and at the same time not contribute to the risk of nuclear proliferation. In this way, international nuclear fuel cycle centers for enrichment can help to provide an assurance of supply of nuclear fuel that will reduce the likelihood that individual states will pursue this sensitive technology, which can be used to produce nuclear material directly usable nuclear weapons. Multinational participation in such mechanisms can also potentially promote transparency, build confidence, and make the implementation of IAEA safeguards more effective or more efficient. At the same time, it is important to ensure that there is no dissemination of sensitive technology. The Russian Federation has taken a lead role in this area by establishing an International Uranium Enrichment Center (IUEC) for the provision of enrichment services at its uranium enrichment plant located at the Angarsk Electrolysis Chemical Complex (AECC). This paper describes how the IUEe is organized, who its members are, and the steps that it has taken both to provide an assured supply of nuclear fuel and to ensure protection of sensitive technology. It also describes the relationship between the IUEC and the IAEA and steps that remain to be taken to enhance its assurance of supply. Using the IUEC as a starting point for discussion, the paper also explores more generally the ways in which features of such fuel cycle centers with multinational participation can have an impact on safeguards arrangements, transparency, and confidence-building. Issues include possible lAEA safeguards arrangements or other links to the IAEA that might be established at such fuel cycle centers, impact of location in a nuclear weapon state, and the transition by the IAEA to State Level safeguards approaches.

Panasyuk,A.; Rosenthal,M.; Efremov, G. V.

2009-04-17T23:59:59.000Z

345

Binary Cycle Power Plant | Open Energy Information  

Open Energy Info (EERE)

Binary Cycle Power Plant Binary Cycle Power Plant (Redirected from Binary Cycle Power Plants) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Binary Cycle Power Plant General List of Binary Plants Binary power plant process diagram - DOE EERE 2012 Binary cycle geothermal power generation plants differ from Dry Steam and Flash Steam systems in that the water or steam from the geothermal reservoir never comes in contact with the turbine/generator units. Low to moderately heated (below 400°F) geothermal fluid and a secondary (hence, "binary") fluid with a much lower boiling point that water pass through a heat exchanger. Heat from the geothermal fluid causes the secondary fluid to flash to vapor, which then drives the turbines and subsequently, the generators.

346

Binary Cycle Power Plant | Open Energy Information  

Open Energy Info (EERE)

Binary Cycle Power Plant Binary Cycle Power Plant (Redirected from Binary) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Binary Cycle Power Plant General List of Binary Plants Binary power plant process diagram - DOE EERE 2012 Binary cycle geothermal power generation plants differ from Dry Steam and Flash Steam systems in that the water or steam from the geothermal reservoir never comes in contact with the turbine/generator units. Low to moderately heated (below 400°F) geothermal fluid and a secondary (hence, "binary") fluid with a much lower boiling point that water pass through a heat exchanger. Heat from the geothermal fluid causes the secondary fluid to flash to vapor, which then drives the turbines and subsequently, the generators. Binary cycle power plants are closed-loop systems and virtually nothing

347

NPP and the Global Carbon Cycle  

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

the Global Carbon Cycle the Global Carbon Cycle Introduction Photosynthetic carbon fixation comprises a major component of the global carbon cycle. Data on net primary productivity (NPP) may be sparse, but a consistent NPP data set may be used to calibrate, parameterize and evaluate models of terrestrial carbon cycling, as well as for validation of remote sensing data and other applications (identifying trends, investigating biogeochemical processes, etc.). It is also useful to place such data within the context of carbon cycling and carbon storage worldwide. For example: How much carbon exists in the biosphere, and where exactly is it stored? How much is in fossil fuels (coal, oil, gas), and how large are current fossil-fuel emissions? How much is in living biomass (plants/ animals/ humans)?

348

Nuclear Fuel Cycle Integrated System Analysis  

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

Fuel Cycle Integrated System Analysis Fuel Cycle Integrated System Analysis Abdellatif M. Yacout Argonne National Laboratory Nuclear Engineering Division The nuclear fuel cycle is a complex system with multiple components and activities that are combined to provide nuclear energy to a variety of end users. The end uses of nuclear energy are diverse and include electricity, process heat, water desalination, district heating, and possibly future hydrogen production for transportation and energy storage uses. Components of the nuclear fuel cycle include front end components such as uranium mining, conversion and enrichment, fuel fabrication, and the reactor component. Back end of the fuel cycle include used fuel coming out the reactor, used fuel temporary and permanent storage, and fuel reprocessing. Combined with those components there

349

Wood Burning Combined Cycle Power Plant  

E-Print Network (OSTI)

A combined cycle power plant utilizing wood waste products as a fuel has been designed. This plant will yield a 50% efficiency improvement compared to conventional wood-fueled steam power plants. The power plant features an externally-fired gas turbine combined cycle system that obtains its heat input from a high temperature, high pressure ceramic air heater burning wood waste products as a fuel. This paper presents the results of the design study including the cycle evaluation and a description of the major components of the power plant. The cycle configuration is based on maximum fuel efficiency with minimum capital equipment risk. The cycle discussion includes design point performance of the power plant. The design represents a significant step forward in wood-fueled power plants.

Culley, J. W.; Bourgeois, H. S.

1984-01-01T23:59:59.000Z

350

VISION: Verifiable Fuel Cycle Simulation Model  

SciTech Connect

The nuclear fuel cycle consists of a set of complex components that work together in unison. In order to support the nuclear renaissance, it is necessary to understand the impacts of changes and timing of events in any part of the fuel cycle system. The Advanced Fuel Cycle Initiative’s systems analysis group is developing a dynamic simulation model, VISION, to capture the relationships, timing, and changes in and among the fuel cycle components to help develop an understanding of how the overall fuel cycle works. This paper is an overview of the philosophy and development strategy behind VISION. The paper includes some descriptions of the model components and some examples of how to use VISION.

Jacob Jacobson; A. M. Yacout; Gretchen Matthern; Steven Piet; David Shropshire; Tyler Schweitzer

2010-11-01T23:59:59.000Z

351

Pipeline bottoming cycle study. Final report  

Science Conference Proceedings (OSTI)

The technical and economic feasibility of applying bottoming cycles to the prime movers that drive the compressors of natural gas pipelines was studied. These bottoming cycles convert some of the waste heat from the exhaust gas of the prime movers into shaft power and conserve gas. Three typical compressor station sites were selected, each on a different pipeline. Although the prime movers were different, they were similar enough in exhaust gas flow rate and temperature that a single bottoming cycle system could be designed, with some modifications, for all three sites. Preliminary design included selection of the bottoming cycle working fluid, optimization of the cycle, and design of the components, such as turbine, vapor generator and condensers. Installation drawings were made and hardware and installation costs were estimated. The results of the economic assessment of retrofitting bottoming cycle systems on the three selected sites indicated that profitability was strongly dependent upon the site-specific installation costs, how the energy was used and the yearly utilization of the apparatus. The study indicated that the bottoming cycles are a competitive investment alternative for certain applications for the pipeline industry. Bottoming cycles are technically feasible. It was concluded that proper design and operating practices would reduce the environmental and safety hazards to acceptable levels. The amount of gas that could be saved through the year 2000 by the adoption of bottoming cycles for two different supply projections was estimated as from 0.296 trillion ft/sup 3/ for a low supply projection to 0.734 trillion ft/sup 3/ for a high supply projection. The potential market for bottoming cycle equipment for the two supply projections varied from 170 to 500 units of varying size. Finally, a demonstration program plan was developed.

Not Available

1980-06-01T23:59:59.000Z

352

Program on Technology Innovation: Summary of 2013 EPRI Nuclear Fuel Cycle Assessment Workshop - Vanderbilt University, Nashville, Tennessee, July 23 – 24, 2013  

Science Conference Proceedings (OSTI)

Government, industry, and academic stakeholders assembled at the second EPRI Nuclear Fuel Cycle Assessment Workshop—hosted and co-organized by Vanderbilt University and held July 23–24, 2013—to review ongoing efforts and opportunities for improving sustainability of nuclear fuel cycle (NFC) assessment related knowledge and tools through expanded collaboration. The workshop emphasized three topics addressing the development, maintenance, and application ...

2013-11-26T23:59:59.000Z

353

Organic photovoltaics and concentrators  

E-Print Network (OSTI)

The separation of light harvesting and charge generation offers several advantages in the design of organic photovoltaics and organic solar concentrators for the ultimate end goal of achieving a lower cost solar electric ...

Mapel, Jonathan King

2008-01-01T23:59:59.000Z

354

LASL bismuth sulfate thermochemical hydrogen cycle  

DOE Green Energy (OSTI)

The LASL bismuth sulfate cycle is one of a generic class of solid sulfate cycles in which a metal sulfate is substituted for sulfuric acid in a hybrid (partly electrochemical) cycle. This technique avoids the serious materials and heat penalty problems associated with the handling of concentrated acid solutions, and if the electrolyzer is operated at acid concentrations below 50% it may, in principle, lead to a lower cell voltage with subsequent energy savings. Experiment verification of all steps in the cycle has been obtained, particularly for the decomposition of normal bismuth sulfate and lower bismuth oxysulfates. For the substance, Bi/sub 2/O/sub 3/ 2SO/sub 3/, an endothermic requirement of 172 kJ/mol was obtained, which is considerably less than that for other metal sulfate systems. A rotary kiln was used for continuous experiments and our results show decomposition of this compound to Bi/sub 2/O/sub 3/ SO/sub 3/ in under 8 minutes residence time at 1023 K. Preliminary analysis of the cycle's energy balance shows an overall thermal efficiency of greater than 50% when the maximum cycle reaction temperature is 1500 K. The cycle has potential for hydrogen production when coupled with an energy source such as solar or fusion energy.

Cox, K.E.; Jones, W.M.; Peterson, C.L.

1980-01-01T23:59:59.000Z

355

Parametric analysis of the Kalina cycle  

SciTech Connect

The Kalina cycle utilizes a mixture of ammonia and water as the working fluid in a vapor power cycle. When the liquid mixture is heated the more volatile ammonia tends to vaporize first and at a lower temperature tan does pure water. This property of ammonia-water mixtures makes possible a better match to the enthalpy-temperature curve of a hot gas heat source such as a gas turbine exhaust and also permits circulation of fluids of different composition in different parts of the cycle. Taking advantage of the latter feature, condensation (absorption) can be done at slightly above atmospheric pressure with a low concentration of ammonia, while heat input is at a higher concentration for optimum cycle performance. Computer models have been used to optimize a simplified form of the cycle and to compare results for a more complex version proposed by El-Sayed and Tribus. A method of balancing the cycle was developed and key parameters for optimizing the cycle identified.

Marston, C.H. (Villanova Univ., PA (USA). Dept. of Mechanical Engineering)

1990-01-01T23:59:59.000Z

356

Practical introduction of thorium fuel cycles  

SciTech Connect

The pracitcal introduction of throrium fuel cycles implies that thorium fuel cycles compete economically with uranium fuel cycles in economic nuclear power plants. In this study the reactor types under consideration are light water reactors (LWRs), heavy water reactors (HWRs), high-temperature gas-cooled reactors (HTGRs), and fast breeder reactors (FBRs). On the basis that once-through fuel cycles will be used almost exclusively for the next 20 or 25 years, introduction of economic thorium fuel cycles appears best accomplished by commercial introduction of HTGRs. As the price of natural uranium increases, along with commercialization of fuel recycle, there will be increasing incentive to utilize thorium fuel cycles in heavy water reactors and light water reactors as well as in HTGRs. After FBRs and fuel recycle are commercialized, use of thorium fuel cycles in the blanket of FBRs appears advantageous when fast breeder reactors and thermal reactors operate in a symbiosis mode (i.e., where /sup 233/U bred in the blanket of a fast breeder reactor is utilized as fissile fuel in thermal converter reactors).

Kasten, P.R.

1982-01-01T23:59:59.000Z

357

Back end of an enduring fuel cycle  

SciTech Connect

An enduring nuclear fuel cycle is an essential part of sustainable consumption, the process whereby world`s riches are consumed in a responsible manner so that future generations can continue to enjoy at least some of them. In many countries, the goal of sustainable development has focused attention on the benefits of nuclear technologies. However, sustenance of the nuclear fuel cycle is dependent on sensible management of all the resources of the fuel cycle, including energy, spent fuels, and all of its side streams. The nuclear fuel cycle for energy production has suffered many traumas since the mid seventies. The common basis of technologies producing nuclear explosives and consumable nuclear energy has been a preoccupation for some, predicament for others, and a perception problem for many. It is essential to reestablish a reliable back end of the nuclear fuel cycle that can sustain the resource requirements of an enduring full cycle. This paper identifies some pragmatic steps necessary to reverse the trend and to maintain a necessary fuel cycle option for the future.

Pillay, K.K.S.

1998-03-01T23:59:59.000Z

358

The Anderson Quin Cycle. Final report  

SciTech Connect

The objective of this study was to make a more refined evaluation of the Anderson Quin Cycle based on most recent information on the performance of various elements that will be used in the Anderson Quin Cycle. My original estimate of the work plan for evaluating and optimizing the Anderson Quin Cycle called for 7000 man hours of work. Since this grant was limited to 2150 man hours, we could not expect to achieve all the objectives within the allotted period of work. However, the most relevant program objectives have been completed as reported here. The analysis generally confirms the results originally estimated in my paper on the subject. (Ref. 2) Further optimizations should show even higher efficiencies. The Anderson Quin Cycle (US Patent applied for) basically consists of 5 elements in the power cycle: A refrigeration system to cool and clean the inlet air before it enters the compressor that supplies air for the gas turbine; a gas turbine consisting of a compressor, combustor, and turbine; a steam boiler and steam turbine system using the heat from the exhaust gas out of the gas turbine; a vapor turbine cycle, which utilizes the condensed heat from the exhaust of the steam turbine and the exhaust gas heat leaving the steam boiler to operate a vapor turbine cycle which utilizes another fluid than water, in this case isobutane; and the fifth element consists of a gas cooler and heat pump system, which removes the heat from the exhaust gas to lower its temperature essentially to atmospheric temperature, and at the same time permits treatment of the exhaust gas to remove acid components such as sulfur dioxide and nitrogen oxides. Current industry accepted component characteristics were incorporated in the performance analysis of the overall cycle, ensuring accurate and meaningful operating predictions. The characteristics and performance of each of the elements are described. The thermal efficiency of the optimized calculated Anderson Quin Cycle is 62 percent.

Anderson, J.H.; Bilbow, W.M.

1993-03-18T23:59:59.000Z

359

FUEL CYCLE POTENTIAL WASTE FOR DISPOSITION  

SciTech Connect

The United States (U.S.) currently utilizes a once-through fuel cycle where used nuclear fuel (UNF) is stored on-site in either wet pools or in dry storage systems with ultimate disposal in a deep mined geologic repository envisioned. Within the Department of Energy's (DOE) Office of Nuclear Energy (DOE-NE), the Fuel Cycle Research and Development Program (FCR&D) develops options to the current commercial fuel cycle management strategy to enable the safe, secure, economic, and sustainable expansion of nuclear energy while minimizing proliferation risks by conducting research and development of advanced fuel cycles, including modified open and closed cycles. The safe management and disposition of used nuclear fuel and/or nuclear waste is a fundamental aspect of any nuclear fuel cycle. Yet, the routine disposal of used nuclear fuel and radioactive waste remains problematic. Advanced fuel cycles will generate different quantities and forms of waste than the current LWR fleet. This study analyzes the quantities and characteristics of potential waste forms including differing waste matrices, as a function of a variety of potential fuel cycle alternatives including: (1) Commercial UNF generated by uranium fuel light water reactors (LWR). Four once through fuel cycles analyzed in this study differ by varying the assumed expansion/contraction of nuclear power in the U.S; (2) Four alternative LWR used fuel recycling processes analyzed differ in the reprocessing method (aqueous vs. electro-chemical), complexity (Pu only or full transuranic (TRU) recovery) and waste forms generated; (3) Used Mixed Oxide (MOX) fuel derived from the recovered Pu utilizing a single reactor pass; and (4) Potential waste forms generated by the reprocessing of fuels derived from recovered TRU utilizing multiple reactor passes.

Jones, R.; Carter, J.

2010-10-13T23:59:59.000Z

360

FUEL CYCLE POTENTIAL WASTE FOR DISPOSITION  

SciTech Connect

The United States (U.S.) currently utilizes a once-through fuel cycle where used nuclear fuel (UNF) is stored on-site in either wet pools or in dry storage systems with ultimate disposal in a deep mined geologic repository envisioned. Within the Department of Energy's (DOE) Office of Nuclear Energy (DOE-NE), the Fuel Cycle Research and Development Program (FCR&D) develops options to the current commercial fuel cycle management strategy to enable the safe, secure, economic, and sustainable expansion of nuclear energy while minimizing proliferation risks by conducting research and development of advanced fuel cycles, including modified open and closed cycles. The safe management and disposition of used nuclear fuel and/or nuclear waste is a fundamental aspect of any nuclear fuel cycle. Yet, the routine disposal of used nuclear fuel and radioactive waste remains problematic. Advanced fuel cycles will generate different quantities and forms of waste than the current LWR fleet. This study analyzes the quantities and characteristics of potential waste forms including differing waste matrices, as a function of a variety of potential fuel cycle alternatives including: (1) Commercial UNF generated by uranium fuel light water reactors (LWR). Four once through fuel cycles analyzed in this study differ by varying the assumed expansion/contraction of nuclear power in the U.S. (2) Four alternative LWR used fuel recycling processes analyzed differ in the reprocessing method (aqueous vs. electro-chemical), complexity (Pu only or full transuranic (TRU) recovery) and waste forms generated. (3) Used Mixed Oxide (MOX) fuel derived from the recovered Pu utilizing a single reactor pass. (4) Potential waste forms generated by the reprocessing of fuels derived from recovered TRU utilizing multiple reactor passes.

Carter, J.

2011-01-03T23:59:59.000Z

Note: This page contains sample records for the topic "organic rankine cycle" 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

NREL: Energy Analysis: Life Cycle Assessment Harmonization  

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

Life Cycle Assessment Harmonization Life Cycle Assessment Harmonization Life cycle assessment (LCA) harmonization helps lenders, utility executives, and lawmakers get the best, most precise information on greenhouse gas emissions from various sources of energy. LCA has been used to estimate and compare GHG emissions from utility-scale power systems for three decades, often with considerable variability in results. Harmonization provides more exact estimates of greenhouse-gas emissions for renewable and conventional electricity generation technologies, clarifying inconsistent and conflicting estimates in the published literature and reducing uncertainty. Highlights of Recent Studies Chart that compares published and harmonized lifecycle greenhouse gas emissions. For help reading this chart, please contact the webmaster.

362

Solar Augmented Steam Cycles: 2010 Industry Update  

Science Conference Proceedings (OSTI)

Several studies were performed to evaluate a range of solar augmented steam cycle design options. All the designs use steam generated by a solar field in a conventional steam cycle, either offsetting some of the fuel required to generate power or boosting plant power output. The scope of the studies included a conceptual design modeling effort to evaluate a broad range of solar integration design options for biomass and natural gas combined-cycle (NGCC) power plants and two detailed case studies at NGCC ...

2010-12-23T23:59:59.000Z

363

Fuel-cycle costs for alternative fuels  

Science Conference Proceedings (OSTI)

This paper compares the fuel cycle cost and fresh fuel requirements for a range of nuclear reactor systems including the present day LWR without fuel recycle, an LWR modified to obtain a higher fuel burnup, an LWR using recycle uranium and plutonium fuel, an LWR using a proliferation resistant /sup 233/U-Th cycle, a heavy water reactor, a couple of HTGRs, a GCFR, and several LMFBRs. These reactor systems were selected from a set of 26 developed for the NASAP study and represent a wide range of fuel cycle requirements.

Rainey, R.H.; Burch, W.D.; Haire, M.J.; Unger, W.E.

1980-01-01T23:59:59.000Z

364

International Nuclear Fuel Cycle Fact Book  

Science Conference Proceedings (OSTI)

As the US Department of Energy (DOE) and DOE contractors have become increasingly involved with other nations in nuclear fuel cycle and waste management cooperative activities, a need has developed for a ready source of information concerning foreign fuel cycle programs, facilities, and personnel. This Fact Book was compiled to meet that need. The information contained in the International Nuclear Fuel Cycle Fact Book has been obtained from many unclassified sources: nuclear trade journals and newsletters; reports of foreign visits and visitors; CEC, IAEA, and OECN/NEA activities reports; not reflect any one single source but frequently represent a consolidation/combination of information.

Leigh, I.W.; Patridge, M.D.

1991-05-01T23:59:59.000Z

365

Status of APS 1-Mwe Parabolic Trough Project  

SciTech Connect

Arizona Public Service (APS) is currently installing new power facilities to generate a portion of its electricity from solar resources that will satisfy its obligation under the Arizona Environmental Portfolio Standard (EPS). During FY04, APS began construction on a 1-MWe parabolic trough concentrating solar power plant. This plant represents the first parabolic trough plant to begin construction since 1991. Site preparation and construction activities continued throughout much of FY05, and startup activities are planned for Fall 2005 (with completion early in FY06). The plant will be the first commercial deployment of the Solargenix parabolic trough collector technology developed under contract to the National Renewable Energy Laboratory. The plant will use an organic Rankine cycle (ORC) power plant, provided by Ormat. The ORC power plant is much simpler than the conventional steam Rankine cycle plant and allows unattended operation of the facility.

Canada, S.; Brosseau, D.; Kolb, G.; Moore, L.; Cable, R.; Price, H.

2005-11-01T23:59:59.000Z

366

CHARACTERIZATION OF CYCLED SPHERICAL RESORCINOL-FORMALDEHYDE ION EXCHANGE RESIN  

Science Conference Proceedings (OSTI)

This report presents characterization data for two spherical resorcinol-formaldehyde (sRF) resin beds that had processed cesium in non-radioactive and radioactive cycles. All column cycle operations for the resin beds including loading, displacements, elution, regeneration, breakthroughs, and solution analyses are reported in Nash and Duignan, 2009a. That report covered four ion exchange (IX) campaigns using the two {approx}11 mL beds in columns in a lead-lag arrangement. The first two campaigns used Savannah River Site (SRS) Tank 2F nonradioactive simulant while the latter two were fed with actual dissolved salt in the Savannah River National Laboratory (SRNL) Shielded Cells. Both radioactive cycles ran to cesium breakthrough of the lead column. The resin beds saw in excess of 400 bed volumes of feed in each cycle. Resin disposal plans in tank farm processing depend on characterizations of resin used with actual tank feed. Following a final 30 bed volume (BV) elution with nitric acid, the resin beds were found to contain detectable chromium, barium, boron, aluminum, iron, sodium, sulfur, plutonium, cesium, and mercury. Resin affinity for plutonium is important in criticality safety considerations. Cesium-137 was found to be less than 10E+7 dpm/g of resin, similar to past work with sRF resin. Sulfur levels are reasonably consistent with other work and are expected to represent sulfur chemistry used in the resin manufacture. There were low but detectable levels of technetium, americium, and curium. Toxicity Characteristic Leaching Procedure (TCLP) work on the used (eluted) resin samples showed significant contents of mercury, barium, and chromium. One resin sample exceeded the TCLP level for mercury while the other metals were below TCLP levels. TCLP organics measurements indicated measurable benzene in one case, though the source was unknown. Results of this work were compared with other work on similar sRF resin characterizations in this report. This is the first work to quantify mercury on sRF resin. Resin mercury content is important in plans for the disposition of used sRF resin. Mercury speciation in high level waste (HLW) is unknown. It may be partly organic, one example being methyl mercury cation. Further study of the resin's affinity for mercury is recommended.

Nash, C.; Duignan, M.

2010-02-23T23:59:59.000Z

367

Organization | Department of Energy  

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

Organization Organization Organization Office of Indian Energy Organizational Structure As a program office at DOE responsible for implementing energy programs, the Office of Indian Energy is structurally organized under the Office of the Under Secretary. This programmatic structure also focuses and facilitates the coordination between the Office of Indian Energy and the other companion program offices such as the Office of Fossil Energy, Office of Electricity and Energy Reliability and Office of Energy Efficiency and Renewable Energy. The Office of Indian Energy is organized around its major statutory functions, namely, policy and programs: Indian Energy Policy. The Office of Indian Energy coordinates participation in the development, refinement, training, and advice

368

Finding good candidate cycles for efficient p-cycle network design  

E-Print Network (OSTI)

Abstract- An important problem in p-cycle network design is to find a set of p-cycles to protect a given working capacity distribution so that the total spare capacity used by the p-cycles is minimized. Existing approaches for solving the problem include ILP and heuristic algorithm. Both require a set of candidate p-cycles to be precomputed. In this paper, we propose an algorithm to compute a small set of candidate p-cycles that can lead to good performance when used by ILP or the heuristic algorithm. The key idea of the algorithm is to generate a combination of high efficiency cycles and short cycles so that both densely distributed and sparsely distributed working capacities can he efficiently protected by the candidate cycles. The algorithm is also flexible in that the number of cycles generated is controlled by an input parameter. Simulation study showed that the cycles generated by our algorithm can lead to near optimal solutions when used by

Chang Liu; Lu Rum

2004-01-01T23:59:59.000Z

369

Nuclear Fuel Cycle | Department of Energy  

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

Fuel Cycle Fuel Cycle Nuclear Fuel Cycle GC-52 provides legal advice to DOE regarding research and development of nuclear fuel and waste management technologies that meet the nation's energy supply, environmental, and energy security needs. GC-52 also advises DOE on issues involving support for international fuel cycle initiatives aimed at advancing a common vision of the necessity of the expansion of nuclear energy for peaceful purposes worldwide in a safe and secure manner. In addition, GC-52 provides legal advice to DOE regarding the management and disposition of excess uranium in DOE's uranium stockpile. GC-52 attorneys participate in meetings of DOE's Uranium Inventory Management Coordinating Committee and provide advice on compliance with statutory requirements for the sale or transfer of uranium.

370

Life Cycle Inventory Database | Department of Energy  

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

Commercial Buildings » Research Projects » Life Cycle Inventory Commercial Buildings » Research Projects » Life Cycle Inventory Database Life Cycle Inventory Database The U.S. Life Cycle Inventory (LCI) Database serves as a central repository for information about the total energy and resource impacts of developing and using various commercial building materials, components, and assemblies. The database helps manufacturers, building designers, and developers select energy-efficient and environmentally friendly materials, products, and processes for their projects based on the environmental impact of an item over its entire lifespan. The U.S. Department of Energy and the National Renewable Energy Laboratory (NREL) developed the database in 2003 with input from a variety of partners. NREL maintains and updates the database with support from the

371

Obligations Notification Cycle and New Obligations Presentation  

National Nuclear Security Administration (NNSA)

Obligations Notification Cycle and Obligations Notification Cycle and Obligations Notification Cycle and Obligations Notification Cycle and New Obligations New Obligations Bill Benton, DOE/SO-62 Pat Tana, NRC/NSIR Michelle Romano, NAC/NMMSS Obligations Accounting Implementation Workshop Obligations Accounting Implementation Workshop January 13, 2004 January 13, 2004 Crowne Crowne Plaza Plaza Ravinia Ravinia Atlanta, Georgia Atlanta, Georgia Notifications Notifications * There are issues! - Timeliness - Information (or lack thereof) - Other? * DOE Facilities - Bill Benton, 301-903-1150, Bill.Benton@hq.doe.gov * NRC Facilities - Pat Tana, 301-415-8105, pmt@nrc.gov * DOE/SO-62, NRC to request meeting of Government representatives involved. * DOE/SO-62, NRC to solicit concrete case studies to

372

life cycle inventory | OpenEI  

Open Energy Info (EERE)

life cycle inventory life cycle inventory Dataset Summary Description Datasets are for the US electricity grid system for eGrid regions (AKGD, AKMS, AZNM, CAMX, ERCT, FRCC, HIMS, HIOA, MROE, MROW, NEWE, NWPP, NYCW, NYLI, NYUP, RFCE, RFCM, RFCW, RMPA, SPNO, SPSO, SRMV, SRMW, SRSO, SRTV, SRVC) for 2008. The data is provided in life cycle inventory forms (xls and xml) . A module report and a detailed spreadsheet are also included.Datasets include generation and transmission of electricity for each of the eGrid regions. It is representative of the year 2008 mix of fuels used for utility generations for each of the eGrid regions Source USLCI Database Date Released Unknown Date Updated Unknown Keywords eGrid Electricity grid LCI life cycle inventory US Data application/zip icon egrid_electricity_lci_datasets_2008.zip (zip, 7 MiB)

373

World nuclear fuel cycle requirements 1991  

Science Conference Proceedings (OSTI)

The nuclear fuel cycle consists of mining and milling uranium ore, processing the uranium into a form suitable for generating electricity, burning'' the fuel in nuclear reactors, and managing the resulting spent nuclear fuel. This report presents projections of domestic and foreign requirements for natural uranium and enrichment services as well as projections of discharges of spent nuclear fuel. These fuel cycle requirements are based on the forecasts of future commercial nuclear power capacity and generation published in a recent Energy Information Administration (EIA) report. Also included in this report are projections of the amount of spent fuel discharged at the end of each fuel cycle for each nuclear generating unit in the United States. The International Nuclear Model is used for calculating the projected nuclear fuel cycle requirements. 14 figs., 38 tabs.

Not Available

1991-10-10T23:59:59.000Z

374

Fuel Cycle Research and Development Program  

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

Waste Corporate Board James C. Bresee, ScD, JD Advisory Board Member Office of Nuclear Energy July 29, 2009 July 29, 2009 Fuel Cycle Research and Development DM 195665 2 Outline...

375

Free Energy and Internal Combustion Engine Cycles  

E-Print Network (OSTI)

The performance of one type (Carnot) of Internal Combustion Engine (ICE) cycle is analyzed within the framework of thermodynamic free energies. ICE performance is different from that of an External Combustion Engine (ECE) which is dictated by Carnot's rule.

Harris, William D

2012-01-01T23:59:59.000Z

376

Group homology and ideal fundamental cycles.  

E-Print Network (OSTI)

We prove that the group-homological version of the generalized Goncharov invariant of finite-volume locally rank one symmetric spaces determines their generalized Neumann-Yang invariant, which is defined using ideal fundamental cycles.

Thilo Kuessner.; Volume 40 (2012); Pages 239-258

377

The Life Cycle of Stratospheric Aerosol Particles  

Science Conference Proceedings (OSTI)

This paper describes the life cycle of the background (nonvolcanic) stratospheric sulfate aerosol. The authors assume the particles are formed by homogeneous nucleation near the tropical tropopause and are carried aloft into the stratosphere. The ...

Patrick Hamill; Eric J. Jensen; P. B. Russell; Jill J. Bauman

1997-07-01T23:59:59.000Z

378

Life Cycles of Moist Baroclinic Eddies  

Science Conference Proceedings (OSTI)

The interaction between moisture and baroclinic eddies was examined through eddy life-cycle experiments using a global, primitive equation model. How condensation affects the structural evolution of eddies, their fluxes of heat, moisture, and ...

William J. Gutowski Jr.; Lee E. Branscome; Douglas A. Stewart

1992-02-01T23:59:59.000Z

379

Axisymmetric Inlet Design for Combined Cycle Engines.  

E-Print Network (OSTI)

??Performance considerations for a turbine-based combined-cycle engine inlet are presented using the inlet of the Lockheed SR-71 as a baseline. A numerical model is developed… (more)

Colville, Jesse

2005-01-01T23:59:59.000Z

380

Water Recovery From Humidified Power Cycles  

Science Conference Proceedings (OSTI)

Recovery of water from humidified cycles using a scrubber-desaturator, and the recovered water's clean-up and reuse have been shown to be practical, with comparatively low increases in capital costs and heat rates.

1998-02-09T23:59:59.000Z

Note: This page contains sample records for the topic "organic rankine cycle" 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

The Doe Water Cycle Pilot Study  

Science Conference Proceedings (OSTI)

A Department of Energy (DOE) multilaboratory Water Cycle Pilot Study (WCPS) investigated components of the local water budget at the Walnut River watershed in Kansas to study the relative importance of various processes and to determine the ...

N. L. Miller; A. W. King; M. A. Miller; E. P. Springer; M. L. Wesely; K. E. Bashford; M. E. Conrad; K. Costigan; P. N. Foster; H. K. Gibbs; J. Jin; J. Klazura; B. M. Lesht; M. V. Machavaram; F. Pan; J. Song; D. Troyan; R. A. Washington-Allen

2005-03-01T23:59:59.000Z

382

A New Look at the Energy Cycle  

Science Conference Proceedings (OSTI)

The traditional derivation of the energy cycle is reviewed and some paradoxical properties of the energy conversion and flux terms under non-acceleration conditions (steady, conservative motion) are noted. An alternative scheme is derived, based ...

R. Alan Plumb

1983-07-01T23:59:59.000Z

383

A Modification of the Atmospheric Energy Cycle  

Science Conference Proceedings (OSTI)

A modification is made of the conventional energy cycle by combining the eddy flux convergence and the mean meridional circulation terms in the mean momentum and heat equations. The combined terms are interpreted as the effective flux ...

Yoshikazu Hayashi

1987-08-01T23:59:59.000Z

384

Techno-Economics & Life Cycle Assessment (Presentation)  

DOE Green Energy (OSTI)

This presentation provides an overview of the techno-economic analysis (TEA) and life cycle assessment (LCA) capabilities at the National Renewable Energy Laboratory (NREL) and describes the value of working with NREL on TEA and LCA.

Dutta, A.; Davis, R.

2011-12-01T23:59:59.000Z

385

Analysis of a supercritical hydrogen liquefaction cycle  

E-Print Network (OSTI)

In this work, a supercritical hydrogen liquefaction cycle is proposed and analyzed numerically. If hydrogen is to be used as an energy carrier, the efficiency of liquefaction will become increasingly important. By examining ...

Staats, Wayne Lawrence

2008-01-01T23:59:59.000Z

386

Separations Needs for the Alternate Chemical Cycles  

DOE Green Energy (OSTI)

The bulk of the efforts for the development of a hydrogen production plant supported by the Nuclear Hydrogen Initiative (NHI) have been directed towards the sulfur-iodine (S-I) thermochemical cycle. However, it was judged prudent to re-investigate alternate chemical cycles in light of new developments and technical accomplishments derived from the current S-I work. This work analyzes the available data for the promising alternate chemical cycles to provide an understanding of their inherent chemical separations needs. None of the cycles analyzed have separations that are potential “show stoppers”; although some of the indicated separations will be challenging to perform. The majority of the separations involve processes that are either more achievable or more developed

Frederick F. Stewart

2007-05-01T23:59:59.000Z

387

Fuel-cycle assessment of selected bioethanol production.  

Science Conference Proceedings (OSTI)

A large amount of corn stover is available in the U.S. corn belt for the potential production of cellulosic bioethanol when the production technology becomes commercially ready. In fact, because corn stover is already available, it could serve as a starting point for producing cellulosic ethanol as a transportation fuel to help reduce the nation's demand for petroleum oil. Using the data available on the collection and transportation of corn stover and on the production of cellulosic ethanol, we have added the corn stover-to-ethanol pathway in the GREET model, a fuel-cycle model developed at Argonne National Laboratory. We then analyzed the life-cycle energy use and emission impacts of corn stover-derived fuel ethanol for use as E85 in flexible fuel vehicles (FFVs). The analysis included fertilizer manufacturing, corn farming, farming machinery manufacturing, stover collection and transportation, ethanol production, ethanol transportation, and ethanol use in light-duty vehicles (LDVs). Energy consumption of petroleum oil and fossil energy, emissions of greenhouse gases (carbon dioxide [CO{sub 2}], nitrous oxide [N{sub 2}O], and methane [CH{sub 4}]), and emissions of criteria pollutants (carbon monoxide [CO], volatile organic compounds [VOCs], nitrogen oxide [NO{sub x}], sulfur oxide [SO{sub x}], and particulate matter with diameters smaller than 10 micrometers [PM{sub 10}]) during the fuel cycle were estimated. Scenarios of ethanol from corn grain, corn stover, and other cellulosic feedstocks were then compared with petroleum reformulated gasoline (RFG). Results showed that FFVs fueled with corn stover ethanol blends offer substantial energy savings (94-95%) relative to those fueled with RFG. For each Btu of corn stover ethanol produced and used, 0.09 Btu of fossil fuel is required. The cellulosic ethanol pathway avoids 86-89% of greenhouse gas emissions. Unlike the life cycle of corn grain-based ethanol, in which the ethanol plant consumes most of the fossil fuel, farming consumes most of the fossil fuel in the life cycle of corn stover-based ethanol.

Wu, M.; Wang, M.; Hong, H.; Energy Systems

2007-01-31T23:59:59.000Z

388

Cost-Benefit Assessment of Cycle Alignment  

Science Conference Proceedings (OSTI)

The information contained in this technical update report represents an in-depth study to evaluate the different methods used to improve cycle alignment. The study outlines the cost and benefits of using these different methods and describes their application. The collection and assemblage of this information will provide a reference for plant engineering and management personnel in their attempts to improve steam plant efficiency by implementing a systematic cycle alignment program. Through the use of t...

2011-11-07T23:59:59.000Z

389

Combined Cycle Performance Monitoring and Recovery Guideline  

Science Conference Proceedings (OSTI)

The benefits of improved combined cycle power plant performance continue to grow as the cost of fuel rises and international concerns over global warming increase.This guideline provides a framework for performance monitoring, assessment, recovery and optimization of combined cycle power plants. The guideline distills existing experience and documents on heat rate recovery and capacity improvement into a comprehensive manual for plant implementation and training applications. The purpose ...

2012-12-31T23:59:59.000Z

390

The Hybrid Automobile and the Atkinson Cycle  

Science Conference Proceedings (OSTI)

The hybrid automobile is a strikingly new automobile technology with a number of new technological features that dramatically improve energy efficiency. This paper will briefly describe how hybrid automobiles work; what are these new technological features; why the Toyota Prius hybrid internal combustion engine operates on the Atkinson cycle instead of the Otto cycle; and what are the advantages and disadvantages of the hybrid automobile. This is a follow-up to my two previous papers on the physics of automobile engines.1

Bernard J. Feldman

2008-01-01T23:59:59.000Z

391

Damage to Power Plants Due to Cycling  

Science Conference Proceedings (OSTI)

The duty cycle for power plants ranges from baseloading or consistently operating at or near fully rated capacity to two-shifting or shutting down during off-peak demand periods. Quantifying the cost of cycling and finding ways to mitigate and control those costs are critical to profitability. European Technology Development Ltd. (ETD) originally prepared and published this report and has agreed to the current revision by EPRI. The report evaluates the effects and implications of cyclic operation on equi...

2001-07-27T23:59:59.000Z

392

The evaporative gas turbine (EGT) cycle  

SciTech Connect

Humidification of the flow through a gas turbine has been proposed in a variety of forms. The STIG plant involves the generation of steam by the gas turbine exhaust in a heat recovery steam generator (HRSG), and its injection into or downstream of the combustion chamber. This increases the mass flow through the turbine and the power output from the plant, with a small increase in efficiency. In the evaporative gas turbine (or EGT) cycle, water is injected in the compressor discharge in a regenerative gas turbine cycle (a so-called CBTX plant--compressor [C], burner [B], turbine [T], heat exchanger [X]); the air is evaporatively cooled before it enters the heat exchanger. While the addition of water increases the turbine mass flow and power output, there is also apparent benefit in reducing the temperature drop in the exhaust stack. In one variation of the basic EGT cycle, water is also added downstream of the evaporative aftercooler, even continuously in the heat exchanger. There are several other variations on the basic cycle (e.g., the cascaded humidified advanced turbine [CHAT]). The present paper analyzes the performance of the EGT cycle. The basic thermodynamics are first discussed, and related to the cycle analysis of a dry regenerative gas turbine plant. Subsequently some detailed calculations of EGT cycles are presented. The main purpose of the work is to seek the optimum pressure ratio in the EGT cycle for given constraints (e.g., fixed maximum to minimum temperature). It is argued that this optimum has a relatively low value.

Horlock, J.H. [Whittle Lab., Cambridge (United Kingdom)

1998-04-01T23:59:59.000Z

393

Nuclear fuel cycles for mid-century development  

E-Print Network (OSTI)

A comparative analysis of nuclear fuel cycles was carried out. Fuel cycles reviewed include: once-through fuel cycles in LWRs, PHWRs, HTGRs, and fast gas cooled breed and burn reactors; single-pass recycle schemes: plutonium ...

Parent, Etienne, 1977-

2003-01-01T23:59:59.000Z

394

Carbon Cycle 2.0 | Department of Energy  

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

Carbon Cycle 2.0 Carbon Cycle 2.0 Information on the vision and research surrounding the Carbon Cycle 2.0 energy program. cc2overvieweeforummay52011en.pdf (Chinese...

395

Life cycle evolution and systematics of Campanulariid hydrozoans  

E-Print Network (OSTI)

The purpose of this thesis is to study campanulariid life cycle evolution and systematics. The Campanulariidae is a hydrozoan family with many life cycle variations, and provide an excellent model system to study life cycle ...

Govindarajan, Annette Frese, 1970-

2004-01-01T23:59:59.000Z

396

Development of New Biphasic Metal Organic Working Fluids for Subcritical  

Open Energy Info (EERE)

Biphasic Metal Organic Working Fluids for Subcritical Biphasic Metal Organic Working Fluids for Subcritical Geothermal Systems Geothermal Lab Call Project Jump to: navigation, search Last modified on July 22, 2011. Project Title Development of New Biphasic Metal Organic Working Fluids for Subcritical Geothermal Systems Project Type / Topic 1 Laboratory Call for Submission of Applications for Research, Development and Analysis of Geothermal Technologies Project Type / Topic 2 Working Fluids for Binary Power Plants Project Description In binary-cycle plants the cycle efficiency improves as pumping energy is reduced and from maximizing the enthalpy gain of the working fluid for a given amount of heat extracted from the geothermal source brine. Enthalpy gain of the working fluid in the heat exchanger occurs principally from sensible heat gained while passing through the heat exchanger in the liquid state and from vaporization of the organic working fluid near the exit of the heat exchanger. Additional heat transfer is limited after the vapor phase transition due the low thermal conductivity and heat capacity of the vapor. Also, operating pressures and temperatures are constrained by the bulk phase behavior and thermodynamic properties of the working fluid (boiling point, latent heat of vaporization, density, heat capacity, etc.). The fundamental underlying goal of this project is to overcome the cycle efficiency limitations imposed by the bulk thermodynamic proper-ties of the working fluid by introducing a metal-organic heat carrier (MOHC) into the system.

397

Challenges for improving estimates of soil organic carbon stored in  

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

Challenges for improving estimates of soil organic carbon stored in Challenges for improving estimates of soil organic carbon stored in permafrost regions September 30, 2013 Tweet EmailPrint One of the greatest environmental challenges of the 21st century lies in predicting the impacts of anthropogenic activities on Earth's carbon cycle. Soil is a significant component of the carbon cycle, because it contains at least two-thirds of the world's terrestrial carbon and more than twice as much carbon as the atmosphere. Although soil organic carbon (SOC) stocks were built over millennial time scales, they are susceptible to a far more rapid release back to the atmosphere due to climatic and land use change. If environmental perturbations negatively impact the processes regulating the storage of SOC, significant amounts of this carbon could be decomposed

398

AN ORGANIC MODERATED REACTOR FOR PROCESS HEAT  

SciTech Connect

A review is given of the potentialities of an organic moderated reactor for the supply of heat to factories having a large demand for low-pressure steam, together with a requirement for power produced by back-pressure turbine generation. By choosing a suitable steam cycle it is possible to cover the range of typical power demand/head load ratios found in the chemical industry. The economic developments of a reactor installed for such a duty are briefly considered to show the reductions in operating cost that might be brought about during the operating lifetlme of the reactor and its associated plant. (auth)

Baines, B.D.; Conway-Jones, J.M.

1962-02-01T23:59:59.000Z

399

Predicting solar cycle 24 with a solar dynamo model  

E-Print Network (OSTI)

Whether the upcoming cycle 24 of solar activity will be strong or not is being hotly debated. The solar cycle is produced by a complex dynamo mechanism. We model the last few solar cycles by `feeding' observational data of the Sun's polar magnetic field into our solar dynamo model. Our results fit the observed sunspot numbers of cycles 21-23 extremely well and predict that cycle~24 will be about 35% weaker than cycle~23.

Arnab Rai Choudhuri; Piyali Chatterjee; Jie Jiang

2007-01-18T23:59:59.000Z

400

Indirect-fired gas turbine dual fuel cell power cycle  

DOE Patents (OSTI)

The present invention relates generally to an integrated fuel cell power plant, and more specifically to a combination of cycles wherein a first fuel cell cycle tops an indirect-fired gas turbine cycle and a second fuel cell cycle bottoms the gas turbine cycle so that the cycles are thermally integrated in a tandem operating arrangement. The United States Government has rights in this invention pursuant to the employer-employee relationship between the United States Department of Energy and the inventors.

Micheli, P.L.; Williams, M.C.; Sudhoff, F.A.

1998-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "organic rankine cycle" 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

Nuclear Fuel Cycle Cost Comparison Between Once-Through and Fully Closed Cycles  

Science Conference Proceedings (OSTI)

This report presents results from a parametric study of equilibrium fuel cycle costs for a closed fuel cycle with multi-recycling of plutonium (Pu) and minor actinides in fast reactors (FRs) compared to an open, once-through fuel cycle using pressurized water reactors (PWRs). The study examines the impact on fuel cycle costs from changes in the unit costs of uranium, advanced plutonium and uranium recovery by extraction (PUREX) reprocessing of discharged fast-reactor mixed-oxide (FR-MOX) fuel, and fabric...

2010-11-04T23:59:59.000Z

402

Federal Energy Management Program: Life Cycle Cost Analysis for Sustainable  

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

Life Cycle Cost Life Cycle Cost Analysis for Sustainable Buildings to someone by E-mail Share Federal Energy Management Program: Life Cycle Cost Analysis for Sustainable Buildings on Facebook Tweet about Federal Energy Management Program: Life Cycle Cost Analysis for Sustainable Buildings on Twitter Bookmark Federal Energy Management Program: Life Cycle Cost Analysis for Sustainable Buildings on Google Bookmark Federal Energy Management Program: Life Cycle Cost Analysis for Sustainable Buildings on Delicious Rank Federal Energy Management Program: Life Cycle Cost Analysis for Sustainable Buildings on Digg Find More places to share Federal Energy Management Program: Life Cycle Cost Analysis for Sustainable Buildings on AddThis.com... Sustainable Buildings & Campuses Basics

403

The High Cycle Fatigue, Damage Initiation and Growth and Final ...  

Science Conference Proceedings (OSTI)

Energy Based Fatigue Life Prediction Models and Methods for Combined Low Cycle and High Cycle Fatigue · Fatigue Behavior of AM60B Subjected to Variable  ...

404

From Protein Structure to Function: Ring Cycle for Dilating and...  

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

From Protein Structure to Function: Ring Cycle for Dilating and Constricting the Nuclear Pore From Protein Structure to Function: Ring Cycle for Dilating and Constricting the...

405

Increased cycling efficiency and rate capability of copper-coated...  

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

cycling efficiency and rate capability of copper-coated silicon anodes in lithium-ion batteries Title Increased cycling efficiency and rate capability of copper-coated silicon...

406

Changes related to "A Flashing Binary Combined Cycle For Geothermal...  

Open Energy Info (EERE)

Twitter icon Changes related to "A Flashing Binary Combined Cycle For Geothermal Power Generation" A Flashing Binary Combined Cycle For Geothermal Power Generation...

407

Production and Handling Slide 1: The Uranium Fuel Cycle  

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

and Handling The Uranium Fuel Cycle Skip Presentation Navigation Next Slide Last Presentation Table of Contents The Uranium Fuel Cycle Refer to caption below for image...

408

Sulfur-Iodine thermochemical cycle for hydrogen production.  

E-Print Network (OSTI)

??The aim of the thesis was to study the Sulfur-Iodine thermochemical cycle for hydrogen production. There were three reactions in this cycle: Bunsen reaction, sulfuric… (more)

Dan, Huang

2009-01-01T23:59:59.000Z

409

Gas turbine bottoming cycles: Triple-pressure steam versus Kalina  

SciTech Connect

The performance of a triple-pressure steam cycle has been compared with a single-stage Kalina cycle and an optimized three-stage Kalina cycle as the bottoming sections of a gas turbine combined cycle power plant. A Monte Carlo direct search was used to find the optimum separator temperature and ammonia mass fraction for the three-stage Kalina cycle for a specific plant configuration. Both Kalina cycles were more efficient than the triple pressure steam cycle. Optimization of the three-stage Kalina cycle resulted in almost a two percentage point improvement.

Marston, C.H. [Villanova Univ., PA (United States); Hyre, M. [Massachusetts Inst. of Technology, Cambridge, MA (United States)

1995-01-01T23:59:59.000Z

410

Vehicle Manufacturing Futures in Transportation Life-cycle Assessment  

E-Print Network (OSTI)

GHG emissions of future transportation modes. These resultsVehicle Manufacturing Futures in Transportation Life-cycleVehicle Manufacturing Futures in Transportation Life-cycle

Chester, Mikhail; Horvath, Arpad

2011-01-01T23:59:59.000Z

411

NETL - Petroleum-Based Fuels Life Cycle Greenhouse Gas Analysis...  

Open Energy Info (EERE)

Petroleum-Based Fuels Life Cycle Greenhouse Gas Analysis 2005 Baseline Model Jump to: navigation, search Name NETL - Petroleum-Based Fuels Life Cycle Greenhouse Gas Analysis 2005...

412

NREL: Vehicles and Fuels Research - DRIVE: Drive-Cycle Rapid...  

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

representative drive cycles from raw data, the tool is capable of comparing vehicle operation to industry standard test cycles and can even select a representative...

413

Economizer refrigeration cycle space heating and cooling system and process  

DOE Patents (OSTI)

This invention relates to heating and cooling systems and more particularly to an improved system utilizing a Stirling Cycle engine heat pump in a refrigeration cycle. 18 figs.

Jardine, D.M.

1983-03-22T23:59:59.000Z

414

Assessment of the type of cycling infrastructure required to...  

Open Energy Info (EERE)

type of cycling infrastructure required to attract new cyclists Jump to: navigation, search Name Assessment of the type of cycling infrastructure required to attract new cyclists...

415

Projections of Full-Fuel-Cycle Energy and Emissions Metrics  

E-Print Network (OSTI)

2012a. “Analysis & Projections - Models & Documentation. ”Projections of Full-Fuel-Cycle Energy and Emissions MetricsGovernment purposes. Projections of Full-Fuel-Cycle Energy

Coughlin, Katie

2013-01-01T23:59:59.000Z

416

Economizer refrigeration cycle space heating and cooling system and process  

DOE Patents (OSTI)

This invention relates to heating and cooling systems and more particularly to an improved system utilizing a Stirling Cycle engine heat pump in a refrigeration cycle.

Jardine, Douglas M. (Colorado Springs, CO)

1983-01-01T23:59:59.000Z

417

NREL: U.S. Life Cycle Inventory Database - Webmaster  

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

name: Your email address: Your message: Send Message Printable Version Life Cycle Inventory Home About the Project Database Publications Life Cycle Assessments Related Links...

418

Department of Energy Awards $15 Million for Nuclear Fuel Cycle...  

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

15 Million for Nuclear Fuel Cycle Technology Research and Development Department of Energy Awards 15 Million for Nuclear Fuel Cycle Technology Research and Development August 1,...

419

Report of the Fuel Cycle Research and Development Subcommittee...  

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

Report of the Fuel Cycle Research and Development Subcommittee of the Nuclear Energy Advisory Committee Report of the Fuel Cycle Research and Development Subcommittee of the...

420

Biphase turbine bottoming cycle for a diesel engine  

SciTech Connect

Application of a two-phase turbine system to waste heat recovery was examined. Bottoming cycle efficiencies ranging from 15 to 30% were calculated for a 720/sup 0/F diesel exhaust temperature. A single stage demonstration unit, designed for non-toxic fluids (water and DowTherm A) and for atmospheric seals and bearings, had a cycle efficiency of 23%. The net output power was 276 hp at 8,100 rpm, increasing the total shaft power from 1,800 hp for the diesel alone, to 2,076 hp for the combined system. A four stage organic turbine, for the same application, had a rotational speed of 14,700 rpm while a four stage steam turbine had 26,000 rpm. Fabrication drawings were prepared for the turbine and nozzle. The major improvement leading to higher cycle efficiency and lower turbine rpm was found to be the use of a liquid component with lower sensible heat. A reduction in capital cost was found to result from the use of a contact heat exchanger instead of tube-fin construction. The cost for a contact heat exchanger was only $35-52/kWe compared to $98/kWe for a tube-fin heat exchanger. Design drawings and materials list were prepared. A program resulting in the demonstration of a two-phase bottoming system was planned and the required cost estimated. The program would result in a feasibility test of the nozzle and turbine at the end of the first year, a laboratory performance test of the bottoming system by the end of the second year and a field demonstration test and laboratory endurance test of the bottoming system during the third year. The blowdown test rig for the first year's program and test turbine were designed.

Ahmad, S.; Hays, L.

1977-02-15T23:59:59.000Z

Note: This page contains sample records for the topic "organic rankine cycle" 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

APS Users Organization  

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

APSUO APSUO By-Laws Steering Commitee Employment Meetings Compton Award Franklin Award APS Users Organization The APSUO is responsible for advising the APS Associate Laboratory Director in the following areas: The Organization will serve as an advocacy group for the Facility and its user community. The Organization will provide advice to the ALD on matters affecting the user community. The Organization will assure good communication between the APS user community and the APS management. APSUO By-Laws The by-laws upon which the APS User Organization is based. List of Steering Committee Members Steering committee for the APS Users Organization. Employment Bulletin Board APS-related employment opportunities. APSUO Steering Committee Meetings Minutes and presentations from the APSUO meetings.

422

Dr. Hussein Khalil at Reactor and Fuel Cycle Technologies Subcommittee  

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

Blue Blue ribbon presentation by Dr. Hussein Khalil Director's Welcome Organization Achievements Highlights Fact Sheets, Brochures & Other Documents Multimedia Library About Nuclear Energy Nuclear Reactors Designed by Argonne Argonne's Nuclear Science and Technology Legacy Opportunities within NE Division Visit Argonne Work with Argonne Contact us For Employees Site Map Help Join us on Facebook Follow us on Twitter NE on Flickr Celebrating the 70th Anniversary of Chicago Pile 1 (CP-1) Argonne OutLoud on Nuclear Energy Argonne Energy Showcase 2012 Highlights Bookmark and Share Blue ribbon presentation by Hussein Khalil Hussein Khalil Dr. Hussein Khalil during the panel discussion Oct. 21, 2010 On October 12 Hussein Khalil, director of Argonne's Nuclear Engineering Division, participated in a Reactor and Fuel Cycle Technologies

423

End-Triassic calcification crisis and blooms of organic-walled `disaster species'  

E-Print Network (OSTI)

End-Triassic calcification crisis and blooms of organic-walled `disaster species' B. van de the response of marine photosynthetic phytoplankton to the proposed perturbation in the carbon cycle. Our high) contemporaneous blooms of organic-walled, green algal `disaster' species which comprise in one case N70

424

Historical emissions of black and organic carbon aerosol from energy-related combustion, 18502000  

E-Print Network (OSTI)

Historical emissions of black and organic carbon aerosol from energy-related combustion, 1850) and primary organic carbon (OC) aerosols from fossil fuel and biofuel combustion between 1850 and 2000. We-related combustion, 1850­2000, Global Biogeochem. Cycles, 21, GB2018, doi:10.1029/2006GB002840. 1. Importance

Wisconsin at Madison, University of

425

Finding cycles and trees in sublinear time.  

SciTech Connect

We present sublinear-time (randomized) algorithms for finding simple cycles of length at least k {ge} 3 and tree-minors in bounded-degree graphs. The complexity of these algorithms is related to the distance of the graph from being C{sub k}-minor-free (resp., free from having the corresponding tree-minor). In particular, if the graph is far (i.e., {Omega}(1)-far) from being cycle-free, i.e. if one has to delete a constant fraction of edges to make it cycle-free, then the algorithm finds a cycle of polylogarithmic length in time {tilde O}({radical}N), where N denotes the number of vertices. This time complexity is optimal up to polylogarithmic factors. The foregoing results are the outcome of our study of the complexity of one-sided error property testing algorithms in the bounded-degree graphs model. For example, we show that cycle-freeness of N-vertex graphs can be tested with one-sided error within time complexity {tilde O}(poly(1/{epsilon}) {center_dot} {radical}N). This matches the known {Omega}({radical}N) query lower bound, and contrasts with the fact that any minor-free property admits a two-sided error tester of query complexity that only depends on the proximity parameter {epsilon}. For any constant k {ge} 3, we extend this result to testing whether the input graph has a simple cycle of length at least k. On the other hand, for any fixed tree T, we show that T -minor-freeness has a one-sided error tester of query complexity that only depends on the proximity parameter {epsilon}. Our algorithm for finding cycles in bounded-degree graphs extends to general graphs, where distances are measured with respect to the actual number of edges. Such an extension is not possible with respect to finding tree-minors in o({radical}N) complexity.

Czumaj, Artur; Goldreich, Oded; Seshadhri, Comandur; Sohler, Christian; Shapira, Asaf; Ron, Dana

2010-10-01T23:59:59.000Z

426

Enhanced absorption cycle computer model. Final report  

DOE Green Energy (OSTI)

Absorption heat pumps have received renewed and increasing attention in the past two decades. The rising cost of electricity has made the particular features of this heat-powered cycle attractive for both residential and industrial applications. Solar-powered absorption chillers, gas-fired domestic heat pumps, and waste-heat-powered industrial temperatures boosters are a few of the applications recently subjected to intensive research and development. The absorption heat pump research community has begun to search for both advanced cycles in various multistage configurations and new working fluid combinations with potential for enhanced performance and reliability. The development of working absorptions systems has created a need for reliable and effective system simulations. A computer code has been developed for simulation of absorption systems at steady state in a flexible and modular form, making it possible to investigate various cycle configurations with different working fluids. The code is based on unit subroutines containing the governing equations for the system`s components and property subroutines containing thermodynamic properties of the working fluids. The user conveys to the computer an image of his cycle by specifying the different subunits and their interconnections. Based on this information, the program calculates the temperature, flow rate, concentration, pressure, and vapor fraction at each state point in the system, and the heat duty at each unit, from which the coefficient of performance (COP) may be determined. This report describes the code and its operation, including improvements introduced into the present version. Simulation results are described for LiBr-H{sub 2}O triple-effect cycles, LiCl-H{sub 2}O solar-powered open absorption cycles, and NH{sub 3}-H{sub 2}O single-effect and generator-absorber heat exchange cycles. An appendix contains the User`s Manual.

Grossman, G.; Wilk, M. [Technion-Israel Inst. of Tech., Haifa (Israel). Faculty of Mechanical Engineering

1993-09-01T23:59:59.000Z

427

Changing Perspectives on Nonproliferation and Nuclear Fuel Cycles  

SciTech Connect

The concepts of international control over technologies and materials in the proliferation sensitive parts of the nuclear fuel cycle, specifically those related to enrichment and reprocessing, have been the subject of many studies and initiatives over the years. For examples: the International Fissionable Material Storage proposal in President Eisenhower's Speech on Atoms for Peace, and in the Charter of the International Atomic Energy Agency (IAEA) when the organization was formed in 1957; the regional nuclear fuel cycle center centers proposed by INFCE in the 80's; and most recently and notably, proposals by Dr. ElBaradei, the Director General of IAEA to limit production and processing of nuclear weapons usable materials to facilities under multinational control; and by U.S. President George W. Bush, to limit enrichment and reprocessing to States that have already full scale, functioning plants. There are other recent proposals on this subject as well. In this paper, the similarities and differences, as well as the effectiveness and challenges in proliferation prevention of these proposals and concepts will be discussed. The intent is to articulate a ''new nuclear regime'' and to develop concrete steps to implement such regime for future nuclear energy and deployment.

Choi, J; Isaacs, T H

2005-03-29T23:59:59.000Z

428

Organic dairy production.  

E-Print Network (OSTI)

??The aim of this thesis was to gain further knowledge about the performance of cows in organic dairy production and their ability to adapt to… (more)

Ahlman, Therese

2010-01-01T23:59:59.000Z

429

ORGANIC PHOTOVOLTAIC DEVICE OPTIMIZATION .  

E-Print Network (OSTI)

??Polymer based organic photovoltaic (OPV) is making great progress on solar cell performance in the past decade. As a potential alternative to conventional expensive photovoltaic… (more)

Nie, Wanyi

2012-01-01T23:59:59.000Z

430

Technology acceptance in organizations.  

E-Print Network (OSTI)

??New technology has changed how people do business. With rapid development of technology, it has been difficult for businesses and organizations to successfully implement technology… (more)

Stewart, Laurie

2013-01-01T23:59:59.000Z

431

Organization | ornl.gov  

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

About ORNL Fact Sheet Brochure Diversity Leadership Team Organization History Environmental Policy Corporate Giving Research Integrity Who we are, aren't About ORNL Home | ORNL |...

432

Biogas and Cattle Organs.  

E-Print Network (OSTI)

?? A study has been conducted to assess the possibilities to introduce dead cattle organs as the raw material for biogas generation at the rural… (more)

Jamil, Adnan

2008-01-01T23:59:59.000Z

433

Why sequence microbes integral to the cycling of sulfur and iron?  

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

microbes integral to the cycling of sulfur and iron? microbes integral to the cycling of sulfur and iron? Ten percent of the Earth's surface is subglacial and holds a quarter of the world's soil carbon. The environment was long thought to be incapable of supporting life, but recent studies have revealed that microbes thrive in these cold, dark regions though the processes that enable them to do so remain poorly understood. Researchers are studying the subglacial environment below Taylor Glacier, McMurdo Dry Valleys Antarctica to better understand how carbon is sequestered here and how this impacts the global carbon cycle. The project calls for sequencing five bacteria from this Blood Falls ecosystem to answer questions such as how they tolerate the cold, providing further publicly accessible insight on psychrophiles, and what organic material

434

Factors Affecting the Battery Performance of Anthraquinone-based Organic Cathode Materials  

Science Conference Proceedings (OSTI)

Two organic cathode materials based on poly(anthraquinonyl sulfide) structure with different substitution positions were synthesized and their electrochemical behavior and battery performances were investigated. The substitution positions on the anthraquinone structure, binders for electrode preparation and electrolyte formulations have been found to have significant effects on the battery performances of such organic cathode materials. The substitution position with less steric stress has higher capacity, longer cycle life and better high-rate capability. Polyvinylidene fluoride binder and ether-based electrolytes are favorable for the high capacity and long cycle life of the quinonyl organic cathodes.

Xu, Wu; Read, Adam L.; Koech, Phillip K.; Hu, Dehong; Wang, Chong M.; Xiao, Jie; Padmaperuma, Asanga B.; Graff, Gordon L.; Liu, Jun; Zhang, Jiguang

2012-02-01T23:59:59.000Z

435

Fast power cycle for fusion reactors  

SciTech Connect

The unique, deep penetration capability of 14 MeV neutrons produced in DT fusion reactions allows the generation of very high temperature working fluid temperatures in a thermal power cycle. In the FAST (Fusion Augmented Steam Turbine) power cycle steam is directly superheated by the high temperature ceramic refractory interior of the blanket, after being generated by heat extracted from the relatively cool blanket structure. The steam is then passed to a high temperature gas turbine for power generation. Cycle studies have been carried out for a range of turbine inlet temperatures (1600/sup 0/F to 3000/sup 0/F (870 to 1650/sup 0/C)), number of reheats, turbine mechanical efficiency, recuperator effectiveness, and system pressure losses. Gross cycle efficiency is projected to be in the range of 55 to 60%, (fusion energy to electric power), depending on parameters selected. Turbine inlet temperatures above 2000/sup 0/F, while they do increase efficiency somewhat, are not necessarily for high cycle efficiency.

Powell, J.; Fillo, J.; Makowitz, H.

1978-01-01T23:59:59.000Z

436

Combined Cycle Cogeneration at NALCO Chemical  

E-Print Network (OSTI)

The Nalco Chemical Company, while expanding their corporate headquarters, elected to investigate the potential for cogeneration. The headquarters complex has a central physical plant for heating and chilling. The authors describe the analysis approach for determining the most economical system design. Generation capacity ranging from 2.7 MW up to 7.0 MW in both simple cycle cogeneration and combined cycle cogeneration was analyzed. Both single pressure and dual pressure waste heat boilers were included in the evaluation. In addition, absorption chilling and electrical centrifugal chilling capacity expansion were integrated into the model. The gas turbine selection procedure is outlined. Bid evaluation procedure involved a life cycle cost comparison wherein the bid specification responses for each model turbine were incorporated into the life cycle facility program. The recommendation for the facility is a 4.0MW combined cycle cogeneration system. This system is scheduled for startup in October of 1985. Most major equipment has been purchased and the building to house the system is nearing completion. A discussion of the purchase and scheduling integration will be included.

Thunem, C. B.; Jacobs, K. W.; Hanzel, W.

1985-05-01T23:59:59.000Z

437

Supporting Organizations | National Security | ORNL  

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

Initiatives Facilities Events and Conferences Supporting Organizations National Security Home | Science & Discovery | National Security | Supporting Organizations SHARE Supporting...

438

Organic vapor jet printing system  

DOE Patents (OSTI)

An organic vapor jet printing system includes a pump for increasing the pressure of an organic flux.

Forrest, Stephen R

2012-10-23T23:59:59.000Z

439

Metrics-Based Feedback Cycles for Software Life-Cycle Management and Process Improvement  

E-Print Network (OSTI)

This paper summarizes a global organizational feedback cycle, composed of four component feedback cycles, by which the COCOMO II cost estimation model [Boehm et al., 2000] can be used for (1) project or product line scoping; (2) project or product line management; (3) model recalibration to changing circumstances; and (4) evaluation project, product line, or organizational continuous process improvement initiatives

Barry Boehm

2000-01-01T23:59:59.000Z

440

Cycling Operation of Fossil Plants: Volume 3: Cycling Evaluation of Pepco's Potomac River Generating Station  

Science Conference Proceedings (OSTI)

This report presents a methodology for examining the economic feasibility of converting fossil power plants from baseload to cycling service. It employs this approach to examine a proposed change of Pepco's Potomac River units 3, 4, and 5 from baseload operation to two-shift cycling.

1991-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "organic rankine cycle" 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

Cycling Operation of Fossil Plants: Volume 1: Cycling Considerations for Niagara Mohawk's Oswego Unit 5  

Science Conference Proceedings (OSTI)

Fossil plants are being converted to cycling operation to accommodate daily load swings and to decrease the overall system fuel costs. This report summarizes the methods and results of an engineering study of three two-shift cycling approaches considered for Niagara Mohawk's Oswego unit 5: superheater/turbine bypass, variable pressure operations, and full-flow condensate polishing.

1991-05-01T23:59:59.000Z

442

An Extended Solar Cycle 23 with Deep Minimum Transition to Cycle 24: Assessments and Climatic Ramifications  

Science Conference Proceedings (OSTI)

The extended length of solar cycle 23 and the associated deep quiet period (QP) between cycles 23 and 24 have been examined using the international sunspot record from 1755 to 2010. This study has also introduced a QP definition based on a (...

Ernest M. Agee; Emily Cornett; Kandace Gleason

2010-11-01T23:59:59.000Z

443

Carbon Cycle Engineering | Open Energy Information  

Open Energy Info (EERE)

Cycle Engineering Cycle Engineering Jump to: navigation, search Name Carbon Cycle Engineering Address 13725 Dutch Creek Road Place Athens, Ohio Zip 45701 Sector Biofuels, Biomass, Efficiency, Renewable Energy Product Agriculture; Consulting; Engineering/architectural/design Phone number 740-541-1685 Website http://www.Carboncycleengineer Coordinates 39.376838°, -82.029904° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":39.376838,"lon":-82.029904,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

444

Large Scale Truck Duty Cycle.pub  

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

Truck Duty Cycle Evaluation and Truck Duty Cycle Evaluation and Assessment of Fuel Efficiency and Emission Reduction Technologies Oak Ridge National Laboratory managed by UT-Battelle, LLC for the U.S. Department of Energy under Contract number DE-AC05-00OR22725 Research Areas Freight Flows Passenger Flows Supply Chain Efficiency Transportation: Energy Environment Safety Security Vehicle Technologies Research Brief T he Oak Ridge National Laboratory (ORNL) is conducting research to better understand truck fuel economy and emissions in normal everyday use, as part of a study sponsored by the Department of Energy (DOE) Vehicle Technologies Program (VTP). By collecting duty cycle data (velocity, acceleration and elevation) during normal operations of literally thousands of vehicles for an

445

Binary Cycle Power Plant | Open Energy Information  

Open Energy Info (EERE)

GEOTHERMAL ENERGYGeothermal Home GEOTHERMAL ENERGYGeothermal Home Binary Cycle Power Plant General List of Binary Plants Binary power plant process diagram - DOE EERE 2012 Binary cycle geothermal power generation plants differ from Dry Steam and Flash Steam systems in that the water or steam from the geothermal reservoir never comes in contact with the turbine/generator units. Low to moderately heated (below 400°F) geothermal fluid and a secondary (hence, "binary") fluid with a much lower boiling point that water pass through a heat exchanger. Heat from the geothermal fluid causes the secondary fluid to flash to vapor, which then drives the turbines and subsequently, the generators. Binary cycle power plants are closed-loop systems and virtually nothing (except water vapor) is emitted to the atmosphere. Resources below 400°F

446

Neural Network Prediction of solar cycle 24  

E-Print Network (OSTI)

The ability to predict the future behavior of solar activity has become of extreme importance due to its effect on the near Earth environment. Predictions of both the amplitude and timing of the next solar cycle will assist in estimating the various consequences of Space Weather. The level of solar activity is usually expressed by international sunspot number ($R_z$). Several prediction techniques have been applied and have achieved varying degrees of success in the domain of solar activity prediction. In this paper, we predict a solar index ($R_z$) in solar cycle 24 by using the neural network method. The neural network technique is used to analyze the time series of solar activity. According to our predictions of yearly sunspot number, the maximum of cycle 24 will occur in the year 2013 and will have an annual mean sunspot number of 65. Finally, we discuss our results in order to compare it with other suggested predictions.

Ajabshirizadeh, A; Abbassi, S

2010-01-01T23:59:59.000Z

447

Westinghouse fuel cell combined cycle systems  

DOE Green Energy (OSTI)

Efficiency (voltage) of the solid oxide fuel cell (SOFC) should increase with operating pressure, and a pressurized SOFC could function as the heat addition process in a Brayton cycle gas turbine (GT) engine. An overall cycle efficiency of 70% should be possible. In cogeneration, half of the waste heat from a PSOFC/GT should be able to be captured in process steam and hot water, leading to a fuel effectiveness of about 85%. In order to make the PSOFC/GT a commercial reality, satisfactory operation of the SOFC at elevated pressure must be verified, a pressurized SOFC generator module must be designed, built, and tested, and the combined cycle and parameters must be optimized. A prototype must also be demonstrated. This paper describes progress toward making the PSOFC/GT a reality.

Veyo, S.

1996-12-31T23:59:59.000Z

448

International nuclear fuel cycle fact book  

Science Conference Proceedings (OSTI)

As the US Department of Energy (DOE) and DOE contractors have become increasingly involved with other nations in nuclear fuel cycle and waste management cooperative activities, a need has developed for a ready source or information concerning foreign fuel cycle programs, facilities, and personnel. This Fact Book was compiled to meet that need. The information contained has been obtained from nuclear trade journals and newsletters; reports of foreign visits and visitors; CEC, IAEA, and OECD/NEA activities reports; proceedings of conferences and workshops; and so forth. Sources do not agree completely with each other, and the data listed herein does not reflect any one single source but frequently is consolidation/combination of information. Lack of space as well as the intent and purpose of the Fact Book limit the given information to that pertaining to the Nuclear Fuel Cycle and to data considered of primary interest or most helpful to the majority of users.

Leigh, I.W.

1988-01-01T23:59:59.000Z

449

Selling body organs  

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

Selling body organs Selling body organs Name: Betty A Laliberte Location: N/A Country: N/A Date: N/A Question: If a tissue donor dies and some of his/her tissue is donated, should the family be given money or some other benefit? I am a freshman at York HS and am doing a bioethics project. Replies: An interesting question. In my opinion, a family should not receive payment for organ donation. That would introduce an economic element into the decision, which does not seem appropriate. One problem is: Who will pay? The recipient? What if he can't afford it? Who gets the organ? The highest bidder? I guess part of my problem with selling organs and tissues is religious in nature. To me, my life and my body were given freely to me and they are not mine to sell to someone else. They certainly do not belong to my family to profit from.

450

Microbial community transcriptomes reveal microbes and metabolic pathways associated with dissolved organic matter turnover in the sea  

E-Print Network (OSTI)

Marine dissolved organic matter (DOM) contains as much carbon as the Earth's atmosphere, and represents a critical component of the global carbon cycle. To better define microbial processes and activities associated with ...

McCarren, Jay

451

AFIP-6 MKII First Cycle Report  

SciTech Connect

The first fuel plate frame assembly of the AFIP-6 MKII experiment was irradiated as planned from December, 2011 through February, 2012 in the center flux trap of the Advanced Test Reactor during cycle 151A. Following irradiation in this cycle and while reconfiguring the experiment in the ATR canal, a non-fueled component (the bottom plate) of the first fuel plate frame assembly became separated from the rail sides. There is no evidence that the fueled region of the fuel plate frame assembly was compromised by this incident or the irradiation conditions. The separation of this component was determined to have been caused by flow induced vibrations, where vortex shedding frequencies were resonant with a natural frequency of the bottom plate component. This gave way to amplification, fracture, and separation from the assembly. Although parallel flow induced vibrations were analyzed, vortex shedding flow induced vibrations was an unfamiliar failure mode that was difficult to identify. Both the once-irradiated first fuel plate and un-irradiated second fuel plate frame assemblies were planned for irradiation in the subsequent cycle 151B. The AFIP-6 MKII experiment was excluded from irradiation in cycle 151B because non-trivial design modifications would be needed to mitigate this type of incident during the second irradiation cycle. All items of the experiment hardware were accounted for and cycle 151B occurred with a non-fueled AFIP backup assembly in the center flux trap. Options for completion of the AFIP-6 MKII experiment campaign are presented and future preventative actions are recommended.

N.E. Woolstenhulme

2012-03-01T23:59:59.000Z

452

Y-12 Respirator Flow Cycle Time Reduction Project  

SciTech Connect

In mid-July 2000, a Cycle Time Reduction (CTR) project was initiated by senior management to improve the flow and overall efficiency of the respirator distribution process at Y-12. A cross-functional team was formed to evaluate the current process and to propose necessary changes for improvement. Specifically, the team was challenged to make improvements that would eliminate production work stoppages due to the unavailability of respirators in Y-12 Stores. Prior to the team initiation, plant back orders for a specific model respirator were averaging above 600 and have been as high as 750+. The Cycle Time Reduction team segmented the respirator flow into detailed steps, with the focus and emphasis primarily being on the movement of dirty respirators out of work areas, transportation to Oak Ridge National Laboratory (ORNL) Laundry, and return back to Y-12 Stores inventory. The team selected a popular model respirator, size large, to track improvements. Despite a 30 percent increase in respirator usage for the same period of time in the previous year, the team has reduced the back orders by 89% with a steady trend downward. Summary of accomplishments: A 47 percent reduction in the average cycle time for dirty respirators to be laundered and stocked for reuse at the Y-12 Complex; A 73 percent reduction in the average cycle time for dirty respirators to be laundered and stocked for reuse specifically for major users: Enriched Uranium Operations (EUO) and Facilities Maintenance Organization (FMO); Development of a performance measure for tracking back orders; An 89 percent reduction in the number of laundered respirators on back order; Implementation of a tracking method to account for respirator loss; Achievement of an annual cost savings/avoidance of $800K with a one-time cost of $20K; Implementation of a routine pick-up schedule for EUO (major user of respirators); Elimination of activities no longer determined to be needed; Elimination of routine complaint calls to Stores requesting respirators; and Recommendation of improvements at the supplier (ORNL Laundry and Quality groups).

Hawk, C.T.; Rogers, P.E.

2000-12-01T23:59:59.000Z

453

PERFORMANCE OF A STIRLING ENGINE POWERED HEAT ACTIVATED HEAT PUMP  

E-Print Network (OSTI)

by the heat pump effect. The Stirling engine/Rankine cycle refrigeration loop heat pump being developed would and replacement segments of each. The Preliminary Design was completed in 1975. During this phase, several. As a result of this phase, a Stirling/ Rankine, prime mover/refrigeration cycle approach was selected

Oak Ridge National Laboratory

454

Curriculum Vitae Kristen Kelley Knowles  

E-Print Network (OSTI)

PERFORMANCE OF A STIRLING ENGINE POWERED HEAT ACTIVATED HEAT PUMP W. D. C. Richards and W. L. Auxer) which employs a natural gas fired Stirling engine to drive a Rankine cycle vapor compressor is presently by the heat pump effect. The Stirling engine/Rankine cycle refrigeration loop heat pump being developed would

Little, Tony

455

ORCENT2. Nuclear Steam Turbine Cycle Analysis  

SciTech Connect

ORCENT2 performs heat and mass balance calculations at valves-wide-open design conditions, maximum guaranteed rating conditions, and an approximation of part-load conditions for steam turbine cycles supplied with throttle steam, characteristic of contemporary light-water reactors. The program handles both condensing and back-pressure turbine exhaust arrangements. Turbine performance calculations are based on the General Electric Company method for 1800-rpm large steam turbine-generators operating with light-water-cooled nuclear reactors. Output includes all information normally shown on a turbine-cycle heat balance diagram.

Fuller, L.C. [Oak Ridge National Lab, TN (United States)

1979-07-01T23:59:59.000Z

456

Solid oxide fuel cell combined cycles  

DOE Green Energy (OSTI)

The integration of the solid oxide fuel cell and combustion turbine technologies can result in combined-cycle power plants, fueled with natural gas, that have high efficiencies and clean gaseous emissions. Results of a study are presented in which conceptual designs were developed for 3 power plants based upon such an integration, and ranging in rating from 3 to 10 MW net ac. The plant cycles are described and characteristics of key components summarized. Also, plant design-point efficiency estimates are presented as well as values of other plant performance parameters.

Bevc, F.P. [Westinghouse Electric Corp., Orlando, FL (United States). Power Generation Business Unit; Lundberg, W.L.; Bachovchin, D.M. [Westinghouse Electric Corp., Pittsburgh, PA (United States). Science and Technology Center

1996-12-31T23:59:59.000Z

457

Technology Assessment Report: Duty Cycling Controllers Revisited  

SciTech Connect

This report covers an assessment of two brands of energy management controllers that are currently being offered that utilize the principle of duty cycling to purportedly save energy for unitary air conditioners and heat pumps, gas furnaces, and gas fired boilers. The results of an extensive review of past research on this subject as well as a review of vendor sponsored field testing of these controllers compares these newer controllers to those of the past. Included also is a discussion of how the duty cycling principle is prone to misinterpretation as to its potential to save energy.

Webster, Tom; Benenson, Peter

1998-05-01T23:59:59.000Z

458

High-resolution transcription atlas of the mitotic cell cycle in budding yeast  

E-Print Network (OSTI)

division, including cell wall and organelle organization and biosynthesis, regulation of transcrip- tion, signal transduction and protein modification, car- bohydrate metabolic processes, and cell cycle (Additional file 10). Surprisingly, 15 of the 37 sense... to the manufacturer’s instructions and subsequently reverse transcribed to single-stranded cDNA for microarray hybridization. Each 200 ?l reverse transcription reaction was carried out in duplicate and comprised 6 ?g of poly(A)-RNA, 3 ?g random hexamers (RH6), 1 ?l...

Granovskaia, Marina V; Jensen, Lars J; Ritchie, Matthew E; Toedling, Joern; Ning, Ye; Bork, Peer; Huber, Wolfgang; Steinmetz, Lars M

2010-03-01T23:59:59.000Z

459

Test Plan for Heat Cycle Research Program, Phase I Supercritical Cycle Tests  

DOE Green Energy (OSTI)

The 60 kW Heat Cycle Research Facility (HCRF) provides a means of examining different concepts and components associated with the generation of electrical power from a geothermal resource using a binary power cycle. In this power cycle the heat or energy in a hot geothermal fluid is transferred to a secondary working fluid. This working fluid is vaporized in the heat exchange process and the vapor is in turn expanded through a turbine which drives a generator producing electrical power. the heat or energy in the vapor leaving the turbine is transferred to a circulating cooling water in the condenser where the working fluid is condensed to a liquid which can be pumped back to the heaters, completing the cycle. This waste heat load in the condenser is in turn transferred from the cooling water to the atmosphere in a cooling tower. The HCRF allows the different components described in the cycle above to be tested as well as the basic cycle itself. This cycle may vary in that the heaters, condenser, cooling system, pumps, etc. may differ in number and type, however the basic cycle does not change significantly. During this sequence of tests, the HCRF is operated using a supercritical vapor generator and a vertical condenser where the condensation occurs inside of the tubes as opposed to the shell side more commonly used in these applications. In addition to providing the data to be used to evaluate the design of these heat exchangers, these supercritical tests provide cycle and component performance data with both single component working fluids and working fluids comprised of different mixtures of hydrocarbons. The use of these mixtures promises to improve cycle performance, in terms of watt-hours per pound of geothermal fluid, provided the countercurrent flow paths can be maintained between the fluids in both the condenser and the heaters. The supercritical heaters and the condenser to be used in this series of tests were designed to provide the desired countercurrent flow paths.

Mines, Greg L.

1983-06-01T23:59:59.000Z

460

Total Solar Irradiance Measurements During Solar Cycles 22 and 23  

E-Print Network (OSTI)

Total Solar Irradiance Measurements During Solar Cycles 22 and 23 Sabri Mekaoui Abstract The Total Solar Irradiance (TSI) is a measure of the radiative output from the Sun. Its value and its long solar cycles. Cycle 22 lasted from late 1986 until 1996 while cycle 23 is currently ending

Glineur, François

Note: This page contains sample records for the topic "organic rankine cycle" 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

Measuring the Degree of Convergence among European Business Cycles  

Science Conference Proceedings (OSTI)

The dating of a possible European business cycle has been inconclusive. At this stage, there is no consensus on the existence of such a cycle, or of its periodicity and amplitude, or of the relationship of individual member countries to that cycle. Yet ... Keywords: business cycle, coherence, growth rates, time-frequency analysis

Andrew Hughes Hallett; Christian Richter

2006-05-01T23:59:59.000Z

462

Highly efficient 6-stroke engine cycle with water injection  

Science Conference Proceedings (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

463

Are Refiners Entering a Golden Age or a Short Cycle?  

U.S. Energy Information Administration (EIA)

Are Refiners Entering a Golden Age or a Short Cycle? Global Refining Strategies 2007 Barcelona, Spain

464

Assessment of solar-powered cooling of buildings. Final report  

DOE Green Energy (OSTI)

Three solar-powered cooling concepts are analyzed and evaluated. These are: (1) the solar Rankine concept in which a Rankine cycle driven by solar energy is used to drive a vapor compression refrigeration machine, (2) the solar-assisted Rankine concept in which a Rankine cycle driven by both solar energy and fuel combustion is used to drive a vapor compression refrigeration machine, and (3) the solar absorption concept in which solar energy is used to drive an absorption refrigeration machine. These concepts are compared on the bases of coefficient of performance, requirements for primary fuel input, and economic considerations. Conclusions and recommendations are presented. (WHK)

Curran, H.M.

1975-04-01T23:59:59.000Z

465

Survey of solar thermal energy storage subsystems for thermal/electric applications  

SciTech Connect

A survey of the current technology and estimated costs of subsystems for storing the thermal energy produced by solar collectors is presented. The systems considered were capable of producing both electricity and space conditioning for three types of loads: a single-family detached residence, an apartment complex of 100 units, and a city of 30,000 residents, containing both single-family residences and apartments. Collector temperatures will be in four ranges: (1) 100 to 250/sup 0/F (used for space heating and single-cycle air conditioners and organic Rankine low-temperature turbines); (2) 300 to 400/sup 0/F (used for dual-cycle air conditioners and low-temperature turbines); (3) 400 to 600/sup 0/F (using fluids from parabolic trough collectors to run Rankine turbines); (4) 800 to 1000/sup 0/F (using fluids from heliostats to run closed-cycle gas turbines and steam Rankine turbines). The solar thermal energy subsystems will require from 60 to 36 x 10/sup 5/ kWhr (2.05 x 10/sup 5/ to 1.23 x 10/sup 10/ Btu) of thermal storage capacity. In addition to sensible heat and latent heat storage materials, several other media were investigated as potential thermal energy storage materials, including the clathrate and semiclathrate hydrates, various metal hydrides, and heat storage based on inorganic chemical reactions.

Segaser, C. L.

1978-08-01T23:59:59.000Z

466

GREET 1.0 -- Transportation fuel cycles model: Methodology and use  

DOE Green Energy (OSTI)

This report documents the development and use of the Greenhouse Gases, Regulated Emissions, and Energy Use in Transportation (GREET) model. The model, developed in a spreadsheet format, estimates the full fuel-cycle emissions and energy use associated with various transportation fuels for light-duty vehicles. The model calculates fuel-cycle emissions of five criteria pollutants (volatile organic compounds, Co, NOx, SOx, and particulate matter measuring 10 microns or less) and three greenhouse gases (carbon dioxide, methane, and nitrous oxide). The model also calculates the total fuel-cycle energy consumption, fossil fuel consumption, and petroleum consumption using various transportation fuels. The GREET model includes 17 fuel cycles: petroleum to conventional gasoline, reformulated gasoline, clean diesel, liquefied petroleum gas, and electricity via residual oil; natural gas to compressed natural gas, liquefied petroleum gas, methanol, hydrogen, and electricity; coal to electricity; uranium to electricity; renewable energy (hydropower, solar energy, and wind) to electricity; corn, woody biomass, and herbaceous biomass to ethanol; and landfill gases to methanol. This report presents fuel-cycle energy use and emissions for a 2000 model-year car powered by each of the fuels that are produced from the primary energy sources considered in the study.

Wang, M.Q.

1996-06-01T23:59:59.000Z

467

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

E-Print Network (OSTI)

reclamation and solar thermal energy," Energy [accepted]. [and M Dennis, "Solar thermal energy systems in Australia,"and M Dennis, "Solar thermal energy systems in Australia,"

Ho, Tony

2012-01-01T23:59:59.000Z

468

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

E-Print Network (OSTI)

energy conversion systems ..on thermal energy conversion systems As energy demandsefficient energy conversion in power systems," in Thermal

Ho, Tony

2012-01-01T23:59:59.000Z

469

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

E-Print Network (OSTI)

in thermal energy conversion efficiency over present solarsolar thermal- photovoltaic co-generation scheme could have potentially very high solar-to-electric efficiency.solar-to-electric conversion efficiencies are attained and no thermal

Ho, Tony

2012-01-01T23:59:59.000Z

470

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

E-Print Network (OSTI)

average collectable solar radiation per unit surface area (striking the earth from solar radiation in 30 minutes iseffectively and focus the solar radiation very accurately

Ho, Tony

2012-01-01T23:59:59.000Z

471

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

E-Print Network (OSTI)

Casten. Update on US Steam Turbine technology. Presented toThe low pressure steam turbine may also become impracticallygeneration above 10MW, steam turbines are able to achieve ~

Ho, Tony

2012-01-01T23:59:59.000Z

472

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

E-Print Network (OSTI)

of heat recovery steam generators operating parameters forand Heat Recovery Steam Generators: Design, Applications,to the Heat Recovery Steam Generator (HRSG) is high, which

Ho, Tony

2012-01-01T23:59:59.000Z

473

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

E-Print Network (OSTI)

large tanks of hot molten salt are stored in containments soreceiver and the liquid molten salt coolant being heated;system; for example, high molten salt temperatures increases

Ho, Tony

2012-01-01T23:59:59.000Z

474

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

E-Print Network (OSTI)

159] B Sternlicht, "Waste energy recover: an excellentThis high quality waste energy though has the potential torecovery of low-grade waste heat," Energy, vol. 22, pp. 661-

Ho, Tony

2012-01-01T23:59:59.000Z

475

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

E-Print Network (OSTI)

circulating in a parabolic trough field which can reachas linear Fresnel lens and parabolic troughs) and high gradegeneration Though the parabolic trough type collector

Ho, Tony

2012-01-01T23:59:59.000Z

476

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

E-Print Network (OSTI)

working fluids including butane, pentane, isopentane,xylene p-xylene pentane butane Alkanes cyclopentane BACKONEalkanes (pentane, butane, cyclopentane, cyclohexane,

Ho, Tony

2012-01-01T23:59:59.000Z

477

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

E-Print Network (OSTI)

collectors," Journal of Solar Energy Engineering, vol. 121,receivers," Journal of Solar Energy Engineering, vol. 117,Towers," ASME Journal of Solar Energy Engineering, vol. 129,

Ho, Tony

2012-01-01T23:59:59.000Z

478

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

E-Print Network (OSTI)

45-51, 1986. [184] CSP Group Sandia National Labs, "Solarrecommended by the CSP group from Sandia National Labs as an

Ho, Tony

2012-01-01T23:59:59.000Z

479

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

E-Print Network (OSTI)

profiles for a dual pressure HRSG. Reprinted with permissionRecovery Steam Generator (HRSG) is high, which is often thecosts, single pressure HRSG may also be used; however, the

Ho, Tony

2012-01-01T23:59:59.000Z