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


1

Solar Thermal Conversion  

SciTech Connect (OSTI)

The thermal conversion process of solar energy is based on well-known phenomena of heat transfer (Kreith 1976). In all thermal conversion processes, solar radiation is absorbed at the surface of a receiver, which contains or is in contact with flow passages through which a working fluid passes. As the receiver heats up, heat is transferred to the working fluid which may be air, water, oil, or a molten salt. The upper temperature that can be achieved in solar thermal conversion depends on the insolation, the degree to which the sunlight is concentrated, and the measures taken to reduce heat losses from the working fluid.

Kreith, F.; Meyer, R. T.

1982-11-01T23:59:59.000Z

2

OCEAN THERMAL ENERGY CONVERSION PROGRAMMATIC ENVIRONMENTAL ASSESSMENT  

E-Print Network [OSTI]

M.D. (editor) Ocean Thermal Energy Conversion (OTEC) Draftin Ocean Thermal Energy Conversion (OTEC) technology haveThe Ocean Thermal Energy Conversion (OTEC) 2rogrammatic

Sands, M.Dale

2013-01-01T23:59:59.000Z

3

OCEAN THERMAL ENERGY CONVERSION PROGRAMMATIC ENVIRONMENTAL ASSESSMENT  

E-Print Network [OSTI]

M.D. (editor) Ocean Thermal Energy Conversion (OTEC) Draftof ocean thermal energy conversion technology. U.S. Depart~June 1-11, 1980 OCEAN THERMAL ENERGY CONVERSION PROGRAMMATIC

Sands, M.Dale

2013-01-01T23:59:59.000Z

4

OCEAN THERMAL ENERGY CONVERSION PROGRAMMATIC ENVIRONMENTAL ASSESSMENT  

E-Print Network [OSTI]

M.D. (editor) Ocean Thermal Energy Conversion (OTEC) Draftr:he comnercialization of ocean thermal energy conversionJune 1-11, 1980 OCEAN THERMAL ENERGY CONVERSION PROGRAMMATIC

Sands, M.Dale

2013-01-01T23:59:59.000Z

5

OCEAN THERMAL ENERGY CONVERSION PROGRAMMATIC ENVIRONMENTAL ASSESSMENT  

E-Print Network [OSTI]

Sands, M.D. (editor) Ocean Thermal Energy Conversion (OTEC)r:he comnercialization of ocean thermal energy conversionJune 1-11, 1980 OCEAN THERMAL ENERGY CONVERSION PROGRAMMATIC

Sands, M.Dale

2013-01-01T23:59:59.000Z

6

DRAFT. ENVIRONMENTAL ASSESSMENT OCEAN THERMAL ENERGY CONVERSION (OTEC) PILOT PLANTS  

E-Print Network [OSTI]

Commercial ocean thermal energy conversion ( OTEC) plants byand M.D. Sands. Ocean thermal energy conversion (OTEC) pilotfield of ocean thermal energy conversion discharges. I~. L.

Sullivan, S.M.

2014-01-01T23:59:59.000Z

7

OCEAN THERMAL ENERGY CONVERSION (OTEC) PROGRAMMATIC ENVIRONMENTAL ANALYSIS  

E-Print Network [OSTI]

of ocean thermal energy conversion technology. U.S. DOE.Open cycle ocean thermal energy conversion. A preliminaryof the Fifth Ocean Thermal Energy Conversion Conference,

Sands, M. D.

2011-01-01T23:59:59.000Z

8

ENVIRONMENTAL ASSESSMENT OCEAN THERMAL ENERGY CONVERSION (OTEC) PILOT PLANTS  

E-Print Network [OSTI]

Sands. 1980. Ocean thermal energy conversion (OTEC) pilotCommercial ocean thermal energy conversion (OTEC) plants byof the Fifth Ocean Thermal Energy Conversion Conference,

Sullivan, S.M.

2014-01-01T23:59:59.000Z

9

ENVIRONMENTAL ASSESSMENT OCEAN THERMAL ENERGY CONVERSION (OTEC) PILOT PLANTS  

E-Print Network [OSTI]

Fifth Ocean Thermal Energy Conversion Conference, FebruarySixth Ocean Thermal Energy Conversion Conference, June 19-Fifth Ocean Thermal Energy Conversion Conference, February

Sullivan, S.M.

2014-01-01T23:59:59.000Z

10

DRAFT. ENVIRONMENTAL ASSESSMENT OCEAN THERMAL ENERGY CONVERSION (OTEC) PILOT PLANTS  

E-Print Network [OSTI]

Fifth Ocean Thermal Energy Conversion Conference, Februarythe Sixth Ocean Thermal Energy Conversion Conference. OceanSixth Ocean Thermal Energy conversion Conference. June 19-

Sullivan, S.M.

2014-01-01T23:59:59.000Z

11

OCEAN THERMAL ENERGY CONVERSION (OTEC) PROGRAMMATIC ENVIRONMENTAL ANALYSIS  

E-Print Network [OSTI]

Fifth Ocean Thermal Energy Conversion Conference, FebruaryFifth Ocean Thermal Energy Conversion Conference, FebruarySixth Ocean Thermal Energy Conversion Conference. June 19-

Sands, M. D.

2011-01-01T23:59:59.000Z

12

OCEAN THERMAL ENERGY CONVERSION: AN OVERALL ENVIRONMENTAL ASSESSMENT  

E-Print Network [OSTI]

1980 :. i l OCEAN THERMAL ENERGY CONVERSION: ENVIRONMENTALM.D. (editor). 1980. Ocean Thermal Energy Conversion DraftDevelopment Plan. Ocean Thermal Energy Conversion. U.S. DOE

Sands, M.Dale

2013-01-01T23:59:59.000Z

13

ENVIRONMENTAL ASSESSMENT OCEAN THERMAL ENERGY CONVERSION (OTEC) PILOT PLANTS  

E-Print Network [OSTI]

Commercial ocean thermal energy conversion (OTEC) plants byof the Fifth Ocean Thermal Energy Conversion Conference,Sands. 1980. Ocean thermal energy conversion (OTEC) pilot

Sullivan, S.M.

2014-01-01T23:59:59.000Z

14

OCEAN THERMAL ENERGY CONVERSION (OTEC) PROGRAMMATIC ENVIRONMENTAL ANALYSIS  

E-Print Network [OSTI]

of ocean thermal energy conversion technology. U.S. DOE.Open cycle ocean thermal energy conversion. A preliminaryCompany. Ocean thermal energy conversion mission analysis

Sands, M. D.

2011-01-01T23:59:59.000Z

15

DRAFT. ENVIRONMENTAL ASSESSMENT OCEAN THERMAL ENERGY CONVERSION (OTEC) PILOT PLANTS  

E-Print Network [OSTI]

Commercial ocean thermal energy conversion ( OTEC) plants byfield of ocean thermal energy conversion discharges. I~. L.II of the Sixth Ocean Thermal Energy conversion Conference.

Sullivan, S.M.

2014-01-01T23:59:59.000Z

16

ENVIRONMENTAL ASSESSMENT OCEAN THERMAL ENERGY CONVERSION (OTEC) PILOT PLANTS  

E-Print Network [OSTI]

Commercial ocean thermal energy conversion (OTEC) plants bySands. 1980. Ocean thermal energy conversion (OTEC) pilotof the Ocean Thermal Energy Conversion (OTEC) Biofouling,

Sullivan, S.M.

2014-01-01T23:59:59.000Z

17

OCEAN THERMAL ENERGY CONVERSION (OTEC) PROGRAMMATIC ENVIRONMENTAL ANALYSIS  

E-Print Network [OSTI]

of the Ocean Thermal Energy Conversion (OTEC) Biofouling,development of ocean thermal energy conversion (OTEC) plant-impact assessment ocean thermal energy conversion (OTEC)

Sands, M. D.

2011-01-01T23:59:59.000Z

18

DRAFT. ENVIRONMENTAL ASSESSMENT OCEAN THERMAL ENERGY CONVERSION (OTEC) PILOT PLANTS  

E-Print Network [OSTI]

Commercial ocean thermal energy conversion ( OTEC) plants bySands. Ocean thermal energy conversion (OTEC) pilot plantof the Ocean Thermal Energy Conversion (OTEC) Biofouling,

Sullivan, S.M.

2014-01-01T23:59:59.000Z

19

DRAFT. ENVIRONMENTAL ASSESSMENT OCEAN THERMAL ENERGY CONVERSION (OTEC) PILOT PLANTS  

E-Print Network [OSTI]

1979. Commercial ocean thermal energy conversion ( OTEC)field of ocean thermal energy conversion discharges. I~. L.II of the Sixth Ocean Thermal Energy conversion Conference.

Sullivan, S.M.

2014-01-01T23:59:59.000Z

20

ENVIRONMENTAL ASSESSMENT OCEAN THERMAL ENERGY CONVERSION (OTEC) PILOT PLANTS  

E-Print Network [OSTI]

1979. Commercial ocean thermal energy conversion (OTEC)of the Fifth Ocean Thermal Energy Conversion Conference,Sands. 1980. Ocean thermal energy conversion (OTEC) pilot

Sullivan, S.M.

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermal conversion factor" 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

OCEAN THERMAL ENERGY CONVERSION: AN OVERALL ENVIRONMENTAL ASSESSMENT  

E-Print Network [OSTI]

M.D. (editor). 1980. Ocean Thermal Energy Conversion Draft1980 :. i l OCEAN THERMAL ENERGY CONVERSION: ENVIRONMENTALDevelopment Plan. Ocean Thermal Energy Conversion. U.S. DOE

Sands, M.Dale

2013-01-01T23:59:59.000Z

22

OCEAN THERMAL ENERGY CONVERSION (OTEC) PROGRAMMATIC ENVIRONMENTAL ANALYSIS  

E-Print Network [OSTI]

for the commercialization of ocean thermal energy conversionE. Hathaway. Open cycle ocean thermal energy conversion. AElectric Company. Ocean thermal energy conversion mission

Sands, M. D.

2011-01-01T23:59:59.000Z

23

DRAFT. ENVIRONMENTAL ASSESSMENT OCEAN THERMAL ENERGY CONVERSION (OTEC) PILOT PLANTS  

E-Print Network [OSTI]

1979. Commercial ocean thermal energy conversion ( OTEC)the intermediate field of ocean thermal energy conversionII of the Sixth Ocean Thermal Energy conversion Conference.

Sullivan, S.M.

2014-01-01T23:59:59.000Z

24

ENVIRONMENTAL ASSESSMENT OCEAN THERMAL ENERGY CONVERSION (OTEC) PILOT PLANTS  

E-Print Network [OSTI]

1979. Commercial ocean thermal energy conversion (OTEC)of the Fifth Ocean Thermal Energy Conversion Conference,and M.D. Sands. 1980. Ocean thermal energy conversion (OTEC)

Sullivan, S.M.

2014-01-01T23:59:59.000Z

25

Ocean Thermal Energy Conversion LUIS A. VEGA  

E-Print Network [OSTI]

Ocean Thermal Energy Conversion LUIS A. VEGA Hawaii Natural Energy Institute, School of Ocean depths of 20 m (surface water) and 1,000 m. OTEC Ocean Thermal Energy Conversion, the process of converting the ocean thermal energy into electricity. OTEC transfer function The relationship between

26

Ocean Thermal Energy Conversion: Potential Environmental Impacts and Fisheries  

E-Print Network [OSTI]

Ocean Thermal Energy Conversion: Potential Environmental Impacts and Fisheries Christina M Comfort Institute #12;Ocean Thermal Energy Conversion (OTEC) · Renewable energy ­ ocean thermal gradient · Large

Hawai'i at Manoa, University of

27

Evaluation of Thermal to Electrical Energy Conversion of High...  

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

Thermal to Electrical Energy Conversion of High Temperature Skutterudite-Based Thermoelectric Modules Evaluation of Thermal to Electrical Energy Conversion of High Temperature...

28

Assessment of ocean thermal energy conversion  

E-Print Network [OSTI]

Ocean thermal energy conversion (OTEC) is a promising renewable energy technology to generate electricity and has other applications such as production of freshwater, seawater air-conditioning, marine culture and chilled-soil ...

Muralidharan, Shylesh

2012-01-01T23:59:59.000Z

29

GUIDED ANGLER FISH ANNUAL CONVERSION FACTORS  

E-Print Network [OSTI]

GUIDED ANGLER FISH ANNUAL CONVERSION FACTORS FOR THE 2014 FISHING YEAR NOAA FISHERIES, ALASKA via the GAF electronic reporting system. If no GAF were harvested in a year, the conversion factor is the first calendar year that GAF regulations will be in effect. Therefore, the conversion factors are based

30

OCEAN THERMAL ENERGY CONVERSION (OTEC) PROGRAMMATIC ENVIRONMENTAL ANALYSIS  

E-Print Network [OSTI]

for the commercialization of ocean thermal energy conversionOpen cycle ocean thermal energy conversion. A preliminary1978. 'Open cycle thermal energy converS1on. A preliminary

Sands, M. D.

2011-01-01T23:59:59.000Z

31

Ocean Thermal Energy Conversion Mostly about USA  

E-Print Network [OSTI]

Ocean Thermal Energy Conversion History Mostly about USA 1980's to 1990's and bias towards Vega Structures (Plantships) · Bottom-Mounted Structures · Model Basin Tests/ At-Sea Tests · 210 kW OC-OTEC) #12;#12;Claude's Off Rio de Janeiro (1933) · Floating Ice Plant: 2.2 MW OC- OTEC to produce 2000

32

NAVFAC Ocean Thermal Energy Conversion (OTEC) Project  

E-Print Network [OSTI]

NAVFAC Ocean Thermal Energy Conversion (OTEC) Project Contract Number N62583-09-C-0083 CDRL A014 OTEC Mini-Spar Pilot Plant 9 December 2011 OTEC-2011-001-4 Prepared for: Naval Facilities; distribution is unlimited. #12; Configuration Report and Development Plan Volume 4 Site Specific OTEC

33

Energy Conversion and Thermal Efficiency Sales Tax Exemption  

Broader source: Energy.gov [DOE]

Ohio may provide a sales and use tax exemption for certain tangible personal property used in energy conversion, solid waste energy conversion, or thermal efficiency improvement facilities designed...

34

COMMERCIAL FISHERY DATA FROM A PROPOSED OCEAN THERMAL ENERGY CONVERSION (OTEC) SITE IN PUERTO RICO  

E-Print Network [OSTI]

proposed Ocean Thermal Energy Conversion (OTEC) sites toassessment: ocean thermal energy conversion (OTEC) program;operation of Ocean Thermal Energy Conversion (OTEC) power

Ryan, Constance J.

2013-01-01T23:59:59.000Z

35

A PRELIMINARY EVALUATION OF IMPINGEMENT AND ENTRAINMENT BY OCEAN THERMAL ENERGY CONVERSION (OTEC) PLANTS  

E-Print Network [OSTI]

Assessment, Ocean Thermal Energy Conversion (OTEC) ProgramAssessment Ocean Thermal Energy Conversion (OTEC), U.S.recommendations for Ocean Thermal Energy Conversion (OTEC)

Sullivan, S.M.

2013-01-01T23:59:59.000Z

36

A PRELIMINARY EVALUATION OF IMPINGEMENT AND ENTRAINMENT BY OCEAN THERMAL ENERGY CONVERSION (OTEC) PLANTS  

E-Print Network [OSTI]

Assessment, Ocean Thermal Energy Conversion (OTEC) ProgramAssessment Ocean Thermal Energy Conversion (OTEC), U.S.for Ocean Thermal Energy Conversion (OTEC) plants. Argonne,

Sullivan, S.M.

2013-01-01T23:59:59.000Z

37

COMMERCIAL FISHERY DATA FROM A PROPOSED OCEAN THERMAL ENERGY CONVERSION (OTEC) SITE IN PUERTO RICO  

E-Print Network [OSTI]

assessment: ocean thermal energy conversion (OTEC) program;proposed Ocean Thermal Energy Conversion (OTEC) sites tooperation of Ocean Thermal Energy Conversion (OTEC) power

Ryan, Constance J.

2013-01-01T23:59:59.000Z

38

COMMERCIAL FISHERY DATA FROM A PROPOSED OCEAN THERMAL ENERGY CONVERSION (OTEC) SITE IN PUERTO RICO  

E-Print Network [OSTI]

at several proposed Ocean Thermal Energy Conversion (OTEC)Environmental assessment: ocean thermal energy conversion (The operation of Ocean Thermal Energy Conversion (OTEC)

Ryan, Constance J.

2013-01-01T23:59:59.000Z

39

Unit Conversion Factors Quantity Equivalent Values  

E-Print Network [OSTI]

Unit Conversion Factors Quantity Equivalent Values Mass 1 kg = 1000 g = 0.001 metric ton = 2·R 10.73 psia·ft3 lbmol·R 62.36 liter·torr mol·K 0.7302 ft3·atm lbmol·R Temperature Conversions: T

Ashurst, W. Robert

40

A PRELIMINARY EVALUATION OF IMPINGEMENT AND ENTRAINMENT BY OCEAN THERMAL ENERGY CONVERSION (OTEC) PLANTS  

E-Print Network [OSTI]

nental Assessment, Ocean Thermal Energy Conversion (OTEC)Impact Assessment Ocean Thermal Energy Conversion (OTEC),Intake Screens for Ocean Thermal Energy M.S. Thesis. Oregon

Sullivan, S.M.

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermal conversion factor" 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

Nominal Performance Biosphere Dose Conversion Factor Analysis  

SciTech Connect (OSTI)

This analysis report is one of the technical reports containing documentation of the Environmental Radiation Model for Yucca Mountain, Nevada (ERMYN), a biosphere model supporting the Total System Performance Assessment (TSPA) for the license application (LA) for the Yucca Mountain repository. This analysis report describes the development of biosphere dose conversion factors (BDCFs) for the groundwater exposure scenario, and the development of conversion factors for assessing compliance with the groundwater protection standard. A graphical representation of the documentation hierarchy for the ERMYN is presented in Figure 1-1. This figure shows the interrelationships among the products (i.e., analysis and model reports) developed for biosphere modeling and provides an understanding of how this analysis report contributes to biosphere modeling. This report is one of two reports that develop biosphere BDCFs, which are input parameters for the TSPA-LA model. The ''Biosphere Model Report'' (BSC 2004 [DIRS 169460]) describes in detail the ERMYN conceptual model and mathematical model. The input parameter reports, shown to the right of the ''Biosphere Model Report'' in Figure 1-1, contain detailed description of the model input parameters, their development, and the relationship between the parameters and specific features events and processes (FEPs). This report describes biosphere model calculations and their output, the BDCFs, for the groundwater exposure scenario. The objectives of this analysis are to develop BDCFs for the groundwater exposure scenario for the three climate states considered in the TSPA-LA as well as conversion factors for evaluating compliance with the groundwater protection standard. The BDCFs will be used in performance assessment for calculating all-pathway annual doses for a given concentration of radionuclides in groundwater. The conversion factors will be used for calculating gross alpha particle activity in groundwater and the annual dose from drinking water for beta- and photon-emitting radionuclides. Another objective of this analysis was to re-qualify the output of the previous revision (BSC 2003 [DIRS 164403]).

M. Wasiolek

2004-09-08T23:59:59.000Z

42

Nominal Performance Biosphere Dose Conversion Factor Analysis  

SciTech Connect (OSTI)

This analysis report is one of the technical reports containing documentation of the Environmental Radiation Model for Yucca Mountain, Nevada (ERMYN), a biosphere model supporting the Total System Performance Assessment (TSPA) for the license application (LA) for the Yucca Mountain repository. This analysis report describes the development of biosphere dose conversion factors (BDCFs) for the groundwater exposure scenario, and the development of conversion factors for assessing compliance with the groundwater protection standards. A graphical representation of the documentation hierarchy for the ERMYN is presented in Figure 1-1. This figure shows the interrelationships among the products (i.e., analysis and model reports) developed for biosphere modeling and provides an understanding of how this analysis report contributes to biosphere modeling. This report is one of two reports that develop BDCFs, which are input parameters for the TSPA-LA model. The ''Biosphere Model Report'' (BSC 2004 [DIRS 169460]) describes in detail the ERMYN conceptual model and mathematical model. The input parameter reports, shown to the right of the ''Biosphere Model Report'' in Figure 1-1, contain detailed description of the model input parameters, their development, and the relationship between the parameters and specific features events and processes (FEPs). This report describes biosphere model calculations and their output, the BDCFs, for the groundwater exposure scenario. This analysis receives direct input from the outputs of the ''Biosphere Model Report'' (BSC 2004 [DIRS 169460]) and the five analyses that develop parameter values for the biosphere model (BSC 2005 [DIRS 172827]; BSC 2004 [DIRS 169672]; BSC 2004 [DIRS 169673]; BSC 2004 [DIRS 169458]; BSC 2004 [DIRS 169459]). The results of this report are further analyzed in the ''Biosphere Dose Conversion Factor Importance and Sensitivity Analysis'' (Figure 1-1). The objectives of this analysis are to develop BDCFs for the groundwater exposure scenario for the three climate states (present day, monsoon, and glacial transition) considered in the TSPA-LA, as well as conversion factors for compliance evaluation with the groundwater protection standards. The BDCFs will be used in performance assessment for calculating all-pathway annual doses for a given concentration of radionuclides in groundwater. The conversion factors will be used for calculating gross alpha particle activity in groundwater and the annual dose from drinking water for beta- and photon-emitting radionuclides.

M.A. Wasiolek

2005-04-28T23:59:59.000Z

43

Open cycle ocean thermal energy conversion system  

DOE Patents [OSTI]

An improved open cycle ocean thermal energy conversion system including a flash evaporator for vaporizing relatively warm ocean surface water and an axial flow, elastic fluid turbine having a vertical shaft and axis of rotation. The warm ocean water is transmitted to the evaporator through a first prestressed concrete skirt-conduit structure circumferentially situated about the axis of rotation. The unflashed warm ocean water exits the evaporator through a second prestressed concrete skirt-conduit structure located circumferentially about and radially within the first skirt-conduit structure. The radially inner surface of the second skirt conduit structure constitutes a cylinder which functions as the turbine's outer casing and obviates the need for a conventional outer housing. The turbine includes a radially enlarged disc element attached to the shaft for supporting at least one axial row of radially directed blades through which the steam is expanded. A prestressed concrete inner casing structure of the turbine has upstream and downstream portions respectively situated upstream and downstream from the disc element. The radially outer surfaces of the inner casing portions and radially outer periphery of the axially interposed disc cooperatively form a downwardly radially inwardly tapered surface. An annular steam flowpath of increasing flow area in the downward axial direction is radially bounded by the inner and outer prestressed concrete casing structures. The inner casing portions each include a transversely situated prestressed concrete circular wall for rotatably supporting the turbine shaft and associated structure. The turbine blades are substantially radially coextensive with the steam flowpath and receive steam from the evaporator through an annular array of prestressed concrete stationary vanes which extend between the inner and outer casings to provide structural support therefor and impart a desired flow direction to the steam.

Wittig, J. Michael (West Goshen, PA)

1980-01-01T23:59:59.000Z

44

Thermal Sciences The thermal sciences area involves the study of energy conversion and transmission, power  

E-Print Network [OSTI]

Thermal Sciences The thermal sciences area involves the study of energy conversion and transmission, power generation, the flow of liquids and gases, and the transfer of thermal energy (heat) by means in virtually all energy conversion devices and systems. One may think of the jet engine as a mechanical device

New Hampshire, University of

45

ENVIRONMENTAL ASSESSMENT OCEAN THERMAL ENERGY CONVERSION (OTEC) PILOT PLANTS  

E-Print Network [OSTI]

the external fluid mechanics of OTEC plants: report coveringocean thermal energy conversion (OTEC) plants by mid-1980's.1980. A baseline design of a 40-MW OTEC Pilot Johns Hopkins

Sullivan, S.M.

2014-01-01T23:59:59.000Z

46

Energy conversion of fully random thermal relaxation times Franois Barriquand  

E-Print Network [OSTI]

1 Energy conversion of fully random thermal relaxation times François Barriquand proba5050@hotmail.com ABSTRACT. Thermodynamic random processes in thermal systems are generally associated with one or several relaxation times, the inverse of which are formally homogeneous with energy. Here, we show in a precise way

Paris-Sud XI, Université de

47

Disruptive Event Biosphere Dose Conversion Factor Analysis  

SciTech Connect (OSTI)

This analysis report is one of the technical reports containing documentation of the Environmental Radiation Model for Yucca Mountain, Nevada (ERMYN), a biosphere model supporting the total system performance assessment (TSPA) for the license application (LA) for the Yucca Mountain repository. This analysis report describes the development of biosphere dose conversion factors (BDCFs) for the volcanic ash exposure scenario, and the development of dose factors for calculating inhalation dose during volcanic eruption. A graphical representation of the documentation hierarchy for the ERMYN is presented in Figure 1-1. This figure shows the interrelationships among the products (i.e., analysis and model reports) developed for biosphere modeling and provides an understanding of how this analysis report contributes to biosphere modeling. This report is one of two reports that develop biosphere BDCFs, which are input parameters for the TSPA model. The ''Biosphere Model Report'' (BSC 2004 [DIRS 169460]) describes in detail the ERMYN conceptual model and mathematical model. The input parameter reports, shown to the right of the Biosphere Model Report in Figure 1-1, contain detailed descriptions of the model input parameters, their development and the relationship between the parameters and specific features, events and processes (FEPs). This report describes biosphere model calculations and their output, the BDCFs, for the volcanic ash exposure scenario. This analysis receives direct input from the outputs of the ''Biosphere Model Report'' (BSC 2004 [DIRS 169460]) and from the five analyses that develop parameter values for the biosphere model (BSC 2004 [DIRS 169671]; BSC 2004 [DIRS 169672]; BSC 2004 [DIRS 169673]; BSC 2004 [DIRS 169458]; and BSC 2004 [DIRS 169459]). The results of this report are further analyzed in the ''Biosphere Dose Conversion Factor Importance and Sensitivity Analysis''. The objective of this analysis was to develop the BDCFs for the volcanic ash exposure scenario and the dose factors for calculating inhalation doses during volcanic eruption (eruption phase of the volcanic event). For the volcanic ash exposure scenario, the mode of radionuclide release into the biosphere is a volcanic eruption through the repository with the resulting entrainment of contaminated waste in the tephra and the subsequent atmospheric transport and dispersion of contaminated material in the biosphere. The biosphere process model for this scenario uses the surface deposition of contaminated ash as the source of radionuclides in the biosphere. The initial atmospheric transport and dispersion of the ash as well as its subsequent redistribution by fluvial and aeolian processes are not addressed within the biosphere model. These processes influence the value of the source term that is calculated elsewhere and then combined with the BDCFs in the TSPA model to calculate expected dose to the receptor. Another objective of this analysis was to re-qualify the output of the previous revision (BSC 2003 [DIRS 163958]).

M. Wasiolek

2004-09-08T23:59:59.000Z

48

Thermal to electricity conversion using thermal magnetic properties  

DOE Patents [OSTI]

A system for the generation of Electricity from Thermal Energy using the thermal magnetic properties of a Ferromagnetic, Electrically Conductive Material (FECM) in one or more Magnetic Fields. A FECM is exposed to one or more Magnetic Fields. Thermal Energy is applied to a portion of the FECM heating the FECM above its Curie Point. The FECM, now partially paramagnetic, moves under the force of the one or more Magnetic Fields. The movement of the FECM induces an electrical current through the FECM, generating Electricity.

West, Phillip B [Idaho Falls, ID; Svoboda, John [Idaho Falls, ID

2010-04-27T23:59:59.000Z

49

COMMERCIAL FISHERY DATA FROM A PROPOSED OCEAN THERMAL ENERGY CONVERSION (OTEC) SITE IN PUERTO RICO  

E-Print Network [OSTI]

Ocean Thermal Energy Conversion (OTEC) sites to identify thefishery resources at potential OTEC sites. At this time, thethermal energy conversion (OTEC) program; preoperational

Ryan, Constance J.

2013-01-01T23:59:59.000Z

50

Disruptive Event Biosphere Doser Conversion Factor Analysis  

SciTech Connect (OSTI)

The purpose of this report was to document the process leading to, and the results of, development of radionuclide-, exposure scenario-, and ash thickness-specific Biosphere Dose Conversion Factors (BDCFs) for the postulated postclosure extrusive igneous event (volcanic eruption) at Yucca Mountain. BDCF calculations were done for seventeen radionuclides. The selection of radionuclides included those that may be significant dose contributors during the compliance period of up to 10,000 years, as well as radionuclides of importance for up to 1 million years postclosure. The approach documented in this report takes into account human exposure during three different phases at the time of, and after, volcanic eruption. Calculations of disruptive event BDCFs used the GENII-S computer code in a series of probabilistic realizations to propagate the uncertainties of input parameters into the output. The pathway analysis included consideration of different exposure pathway's contribution to the BDCFs. BDCFs for volcanic eruption, when combined with the concentration of radioactivity deposited by eruption on the soil surface, allow calculation of potential radiation doses to the receptor of interest. Calculation of radioactivity deposition is outside the scope of this report and so is the transport of contaminated ash from the volcano to the location of the receptor. The integration of the biosphere modeling results (BDCFs) with the outcomes of the other component models is accomplished in the Total System Performance Assessment (TSPA), in which doses are calculated to the receptor of interest from radionuclides postulated to be released to the environment from the potential repository at Yucca Mountain.

M. Wasiolek

2000-12-28T23:59:59.000Z

51

Nominal Performance Biosphere Dose Conversion Factor Analysis  

SciTech Connect (OSTI)

The purpose of this report was to document the process leading to development of the Biosphere Dose Conversion Factors (BDCFs) for the postclosure nominal performance of the potential repository at Yucca Mountain. BDCF calculations concerned twenty-four radionuclides. This selection included sixteen radionuclides that may be significant nominal performance dose contributors during the compliance period of up to 10,000 years, five additional radionuclides of importance for up to 1 million years postclosure, and three relatively short-lived radionuclides important for the human intrusion scenario. Consideration of radionuclide buildup in soil caused by previous irrigation with contaminated groundwater was taken into account in the BDCF development. The effect of climate evolution, from the current arid conditions to a wetter and cooler climate, on the BDCF values was evaluated. The analysis included consideration of different exposure pathway's contribution to the BDCFs. Calculations of nominal performance BDCFs used the GENII-S computer code in a series of probabilistic realizations to propagate the uncertainties of input parameters into the output. BDCFs for the nominal performance, when combined with the concentrations of radionuclides in groundwater allow calculation of potential radiation doses to the receptor of interest. Calculated estimates of radionuclide concentration in groundwater result from the saturated zone modeling. The integration of the biosphere modeling results (BDCFs) with the outcomes of the other component models is accomplished in the Total System Performance Assessment (TSPA) to calculate doses to the receptor of interest from radionuclides postulated to be released to the environment from the potential repository at Yucca Mountain.

Wasiolek, Maryla A.

2000-12-21T23:59:59.000Z

52

A PRELIMINARY EVALUATION OF IMPINGEMENT AND ENTRAINMENT BY OCEAN THERMAL ENERGY CONVERSION (OTEC) PLANTS  

E-Print Network [OSTI]

Thermal Energy Conversion (OTEC) Program PreoperationalThermal Energy Conversion (OTEC), U.S. Department of Energy,aspects of the screens for OTEC intake systems. U.S. Energy

Sullivan, S.M.

2013-01-01T23:59:59.000Z

53

Progress from DOE EF RC: Solid-State Solar-Thermal Energy Conversion...  

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

from DOE EF RC: Solid-State Solar-Thermal Energy Conversion Center (S3TEC ) Progress from DOE EF RC: Solid-State Solar-Thermal Energy Conversion Center (S3TEC ) Introduction to the...

54

OCEAN THERMAL ENERGY CONVERSION ECOLOGICAL DATA REPORT FROM 0. S. S. RESEARCHER IN GULF OF MEXICO, JULY 12-23, 1977.  

E-Print Network [OSTI]

LBL-8945 GOTEC-01 OCEAN THERMAL ENERGY CONVERSION ECOLOGICALThree Proposed Ocean Thermal Energy Conversion (OTEC) Sites:an operating Ocean Thermal Energy Conversion plant were in-

Quinby-Hunt, M.S.

2008-01-01T23:59:59.000Z

55

OCEAN THERMAL ENERGY CONVERSION PRELIMINARY DATA REPORT FOR THE NOVEMBER 1977 GOTEC-02 CRUISE TO THE GULF OF MEXICO MOBILE SITE  

E-Print Network [OSTI]

9437 GOTEC-02 OCEAN THERMAL ENERGY CONVERSION PRELIMINARYto potential Ocean Thermal Energy Conversion (OTEC) sites inThree Proposed Ocean Thermal Energy Conversion (OTEC) Sites:

Commins, M.L.

2010-01-01T23:59:59.000Z

56

OCEAN THERMAL ENERGY CONVERSION PRELIMINARY DATA REPORT FOR THE NOVEMBER 1977 GOTEC-02 CRUISE TO THE GULF OF MEXICO MOBILE SITE  

E-Print Network [OSTI]

9437 GOTEC-02 OCEAN THERMAL ENERGY CONVERSION PRELIMINARYThree Proposed Ocean Thermal Energy Conversion (OTEC) Sites:al. , (1979) Ocean Thermal Energy Conversion, Eco- logical

Commins, M.L.

2010-01-01T23:59:59.000Z

57

OCEAN THERMAL ENERGY CONVERSION ECOLOGICAL DATA REPORT FROM 0. S. S. RESEARCHER IN GULF OF MEXICO, JULY 12-23, 1977.  

E-Print Network [OSTI]

LBL-8945 GOTEC-01 OCEAN THERMAL ENERGY CONVERSION ECOLOGICALat Three Proposed Ocean Thermal Energy Conversion (OTEC)effect of an operating Ocean Thermal Energy Conversion plant

Quinby-Hunt, M.S.

2008-01-01T23:59:59.000Z

58

OCEAN THERMAL ENERGY CONVERSION PRELIMINARY DATA REPORT FOR THE NOVEMBER 1977 GOTEC-02 CRUISE TO THE GULF OF MEXICO MOBILE SITE  

E-Print Network [OSTI]

9437 GOTEC-02 OCEAN THERMAL ENERGY CONVERSION PRELIMINARYcruises to potential Ocean Thermal Energy Conversion (OTEC)at Three Proposed Ocean Thermal Energy Conversion (OTEC)

Commins, M.L.

2010-01-01T23:59:59.000Z

59

VOICE CONVERSION BASED ON NON-NEGATIVE MATRIX FACTORIZATION USING PHONEME-CATEGORIZED DICTIONARY  

E-Print Network [OSTI]

VOICE CONVERSION BASED ON NON-NEGATIVE MATRIX FACTORIZATION USING PHONEME-CATEGORIZED DICTIONARY using Non-negative matrix factorization (NMF) is employed for spectral conversion between different conversion, sparse representation, non- negative matrix factorization, sub-dictionary 1. INTRODUCTION

Takiguchi, Tetsuya

60

Recycling of wasted energy : thermal to electrical energy conversion  

E-Print Network [OSTI]

Direct energy conversion ..developed. Typically, direct energy conversion is achievedTechnologies 1.2.1. Direct energy conversion In a direct

Lim, Hyuck

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermal conversion factor" 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

Carbon dioxide release from ocean thermal energy conversion (OTEC) cycles  

SciTech Connect (OSTI)

This paper presents the results of recent measurements of CO{sub 2} release from an open-cycle ocean thermal energy conversion (OTEC) experiment. Based on these data, the rate of short-term CO{sub 2} release from future open-cycle OTEC plants is projected to be 15 to 25 times smaller than that from fossil-fueled electric power plants. OTEC system that incorporate subsurface mixed discharge are expected to result in no long-term release. OTEC plants can significantly reduce CO{sub 2} emissions when substituted for fossil-fueled power generation. 12 refs., 4 figs., 3 tabs.

Green, H.J. (Solar Energy Research Inst., Golden, CO (USA)); Guenther, P.R. (Scripps Institution of Oceanography, La Jolla, CA (USA))

1990-09-01T23:59:59.000Z

62

OCEAN THERMAL ENERGY CONVERSION PRELIMINARY DATA REPORT FOR THE NOVEMBER 1977 GOTEC-02 CRUISE TO THE GULF OF MEXICO MOBILE SITE  

E-Print Network [OSTI]

to potential Ocean Thermal Energy Conversion (OTEC) sites inThree Proposed Ocean Thermal Energy Conversion (OTEC) Sites:

Commins, M.L.

2010-01-01T23:59:59.000Z

63

Recycling of wasted energy : thermal to electrical energy conversion  

E-Print Network [OSTI]

geo-thermal energy, ocean thermal energy, wasted heat ingeothermal energy, ocean thermal energy, wasted heat inthermal energy, geo/ocean-thermal energy, wasted heat in

Lim, Hyuck

2011-01-01T23:59:59.000Z

64

Is G a conversion factor or a fundamental unit?  

E-Print Network [OSTI]

By using fundamental units c, h, G as conversion factors one can easily transform the dimensions of all observables. In particular one can make them all ``geometrical'', or dimensionless. However this has no impact on the fact that there are three fundamental units, G being one of them. Only experiment can tell us whether G is basically fundamental.

G. Fiorentini; L. Okun; M. Vysotsky

2001-12-04T23:59:59.000Z

65

Progress from DOE EF RC: Solid-State Solar-Thermal Energy Conversion...  

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

Energy Frontier Research Center of the DOE Office of Basic Energy Sciences SOLID-STATE SOLAR-THERMAL ENERGY CONVERSION CENTER Progress from DOE EFRC: Solid-State Solar-Thermal...

66

2007 Survey of Energy Resources World Energy Council 2007 Ocean Thermal Energy Conversion COUNTRY NOTES  

E-Print Network [OSTI]

2007 Survey of Energy Resources World Energy Council 2007 Ocean Thermal Energy Conversion 573 and personal communication. Valuable inputs were provided by Don Lennard of Ocean Thermal Energy Conversion organisation. Australia At an ocean energy workshop held in Townsville, northern Queensland in September 2005

67

Recycling of wasted energy : thermal to electrical energy conversion  

E-Print Network [OSTI]

density, making direct thermal energy storage methods, e.g.reduced. Conventional thermal energy harvesting and storageharvesting, storage, and utilization of thermal energy has

Lim, Hyuck

2011-01-01T23:59:59.000Z

68

Recycling of wasted energy : thermal to electrical energy conversion  

E-Print Network [OSTI]

Thermally-Chargeable Supercapacitor Fluctuating Low-GradeThermally-Chargeable Supercapacitor for Fluctuating Low-Thermally-Chargeable Supercapacitor for Fluctuating Low-

Lim, Hyuck

2011-01-01T23:59:59.000Z

69

Recycling of wasted energy : thermal to electrical energy conversion  

E-Print Network [OSTI]

the portion of thermal energy that can be converted toof high-performance thermal energy harvesting systems, butreferred to as the thermal energy from low- temperature heat

Lim, Hyuck

2011-01-01T23:59:59.000Z

70

Recycling of wasted energy : thermal to electrical energy conversion  

E-Print Network [OSTI]

Other LGH sources include solar thermal energy, geo-thermalThe heat source can be solar thermal energy, biologicalsources include the coolants in coal and nuclear power plants, solar thermal energy,

Lim, Hyuck

2011-01-01T23:59:59.000Z

71

Recycling of wasted energy : thermal to electrical energy conversion  

E-Print Network [OSTI]

CALIFORNIA, SAN DIEGO Recycling of Wasted Energy : ThermalOF THE DISSERTATION Recycling of Wasted Energy : Thermal to

Lim, Hyuck

2011-01-01T23:59:59.000Z

72

2008 Guidelines to Defra's GHG Conversion Factors Guidelines to Defra's GHG Conversion Factors  

E-Print Network [OSTI]

Basis 5 Burning oil is also known as kerosene or paraffin used for heating systems. Aviation Turbine biomass heating systems. The emission factors are based on the factor provided in SAP2005, Table 12. Page - Imports and Exports Last updated: Jun-05 Total emissions (kg CO2) Total electricity produced Total heat

73

Draft environmental assessment: Ocean Thermal Energy Conversion (OTEC) Pilot Plants  

SciTech Connect (OSTI)

This Environmental Assessment (EA) has been prepared, in accordance with the National Environmental Policy Act of 1969, for the deployment and operation of a commercial 40-Megawatt (MW) Ocean Thermal Energy Conversion (OTEC) Pilot Plant (hereafter called the Pilot Plant). A description of the proposed action is presented, and a generic environment typical of the candidate Pilot Plant siting regions is described. An assessment of the potential environmental impacts associated with the proposed action is given, and the risk of credible accidents and mitigating measures to reduce these risks are considered. The Federal and State plans and policies the proposed action will encompass are described. Alternatives to the proposed action are presented. Appendix A presents the navigation and environmental information contained in the US Coast Pilot for each of the candidate sites; Appendix B provides a brief description of the methods and calculations used in the EA. It is concluded that environmental disturbances associated with Pilot Plant activities could potentially cause significant environmental impacts; however, the magnitude of these potential impacts cannot presently be assessed, due to insufficient engineering and environmental information. A site- and design-specific OTEC Pilot Plant Environmental Impact Statement (EIS) is required to resolve the potentially significant environmental effects associated with Pilot Plant deployment and operation. (WHK)

Sullivan, S.M.; Sands, M.D.; Donat, J.R.; Jepsen, P.; Smookler, M.; Villa, J.F.

1981-02-01T23:59:59.000Z

74

Ocean Thermal Energy Conversion (OTEC) Programmatic Environmental Analysis--Appendices  

SciTech Connect (OSTI)

The programmatic environmental analysis is an initial assessment of Ocean Thermal Energy Conversion (OTEC) technology considering development, demonstration and commercialization. It is concluded that the OTEC development program should continue because the development, demonstration, and commercialization on a single-plant deployment basis should not present significant environmental impacts. However, several areas within the OTEC program require further investigation in order to assess the potential for environmental impacts from OTEC operation, particularly in large-scale deployments and in defining alternatives to closed-cycle biofouling control: (1) Larger-scale deployments of OTEC clusters or parks require further investigations in order to assess optimal platform siting distances necessary to minimize adverse environmental impacts. (2) The deployment and operation of the preoperational platform (OTEC-1) and future demonstration platforms must be carefully monitored to refine environmental assessment predictions, and to provide design modifications which may mitigate or reduce environmental impacts for larger-scale operations. These platforms will provide a valuable opportunity to fully evaluate the intake and discharge configurations, biofouling control methods, and both short-term and long-term environmental effects associated with platform operations. (3) Successful development of OTEC technology to use the maximal resource capabilities and to minimize environmental effects will require a concerted environmental management program, encompassing many different disciplines and environmental specialties. This volume contains these appendices: Appendix A -- Deployment Scenario; Appendix B -- OTEC Regional Characterization; and Appendix C -- Impact and Related Calculations.

Authors, Various

1980-01-01T23:59:59.000Z

75

Study of thermal conversion of naphthenic oils on the basis of analysis of their middle fractions  

SciTech Connect (OSTI)

The composition of the middle fractions of the thermal decomposition products of naphthenic oils obtained at 300, 350, and 400{degrees}C was studied. It was shown that the character of conversions of petroleum hydrocarbons is governed by the intensity of thermal treatment and by the chemical nature of the starting oil. The removal of aliphatic chains from high-boiling components of the petroleum at a temperature below 350{degrees}C results in the new formation of linear and isoprene alkanes in their middle fractions similarly to the catagenic transformations of oils in deposits. The rise in temperature up to 400{degrees}C enhances the destruction processes related to extension of the reactions of the homolytic cleavage of C-C bonds in aliphatic chains. This results in practically complete destruction of isoprene alkanes and in predominance of low-molecular homologs among the linear alkanes. On the basis of the results obtained it can be supposed that the thermal treatment is an important factor in the conversion of naphthenic oils into paraffin oils. 10 refs., 2 figs., 3 tabs.

Kayukova, G.P.; Kurbskii, G.P.; Mutalapova, R.I. [A.E. Arbuzov Inst. of Organic and Physical Chemistry, Kazan (Russian Federation)] [and others

1994-05-10T23:59:59.000Z

76

The Exposure Rate Conversion Factor for Nuclear Fallout  

SciTech Connect (OSTI)

Nuclear fallout is comprised of approximately 2000 radionuclides. About 1000 of these radionuclides are either primary fission products or activated fission products that are created during the burn process. The exposure rate one meter above the surface produced by this complex mixture of radionuclides varies rapidly with time since many of the radionuclides are short-lived and decay numerous times before reaching a stable isotope. As a result, the mixture of radionuclides changes rapidly with time. Using a new code developed at the Lawrence Livermore National Laboratory, the mixture of radionuclides at any given point in time can be calculated. The code also calculates the exposure rate conversion factor (ECF) for all 3864 individual isotopes contained in its database based on the total gamma energy released per decay. Based on the combination of isotope mixture and individual ECFs, the time-dependent variation of the composite exposure rate conversion factor for nuclear fallout can be easily calculated. As example of this new capability, a simple test case corresponding to a 10 kt, uranium-plutonium fuel has been calculated. The results for the time-dependent, composite ECF for this test case are shown in Figure 1. For comparison, we also calculated the composite exposure rate conversion factor using the conversion factors found in Federal Guidance Report No.12 (FGR-12) published by ORNL, which contains the conversion factors for approximately 1000 isotopes. As can be noted from Figure 1, the two functions agree reasonably well at times greater than about 30 minutes. However, they do not agree at early times since FGR-12 does not include all of the short-lived isotopes that are produced in nuclear fallout. It should also be noted that the composite ECF at one hour is 19.7 R/hr per Ci/m{sup 2}. This corresponds to 3148 R/hr per 1 kt per square mile, which agrees reasonably well with the value of 3000 R/hr per 1 kt per square mile as quoted by Glasstone. We have also tabulated the top 50 contributors to the exposure rate at various points in time following a detonation. These major contributors are given in Table 1.

Spriggs, G D

2009-02-11T23:59:59.000Z

77

Modeling the Physical and Biochemical Influence of Ocean Thermal Energy Conversion Plant Discharges into their Adjacent Waters  

Broader source: Energy.gov [DOE]

Modeling the Physical and Biochemical Influence of Ocean Thermal Energy Conversion Plant Discharges into their Adjacent Waters

78

Recycling of wasted energy : thermal to electrical energy conversion  

E-Print Network [OSTI]

Chargeable Double-Layer Supercapacitors to be submitted toon Thermally-Chargeable Double- Layer Supercapacitors 2.1.of Thermally-Chargeable Supercapacitors in Various Solvents

Lim, Hyuck

2011-01-01T23:59:59.000Z

79

Recycling of wasted energy : thermal to electrical energy conversion  

E-Print Network [OSTI]

solar radiation, and the geothermal energy. [16] Fig. 1.1.thermal energy, geothermal energy, wasted heat from athermal energy, geothermal energy, ocean thermal energy,

Lim, Hyuck

2011-01-01T23:59:59.000Z

80

Recycling of wasted energy : thermal to electrical energy conversion  

E-Print Network [OSTI]

biological thermal energy, geothermal energy, wasted heatpower plants, solar thermal energy, geothermal energy, oceansolar radiation, and the geothermal energy. [16] Fig. 1.1.

Lim, Hyuck

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermal conversion factor" 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

PROCESS DESIGN AND CONTROL Efficient Conversion of Thermal Energy into Hydrogen: Comparing Two Methods  

E-Print Network [OSTI]

PROCESS DESIGN AND CONTROL Efficient Conversion of Thermal Energy into Hydrogen: Comparing Two for the production of hydrogen from water and high temperature thermal energy are presented and compared. Increasing for the production of hydrogen from water has received considerable attention.1 High temperature thermal energy

Kjelstrup, Signe

82

Ocean thermal energy conversion plants : experimental and analytical study of mixing and recirculation  

E-Print Network [OSTI]

Ocean thermal energy conversion (OTEC) is a method of generating power using the vertical temperature gradient of the tropical ocean as an energy source. Experimental and analytical studies have been carried out to determine ...

Jirka, Gerhard H.

83

Energy conversion using thermal transpiration : optimization of a Knudsen compressor  

E-Print Network [OSTI]

Knudsen compressors are devices without any moving parts that use the nanoscale phenomenon of thermal transpiration to pump or compress a gas. Thermal transpiration takes place when a gas is in contact with a solid boundary ...

Klein, Toby A. (Toby Anna)

2012-01-01T23:59:59.000Z

84

DRAFT. ENVIRONMENTAL ASSESSMENT OCEAN THERMAL ENERGY CONVERSION (OTEC) PILOT PLANTS  

E-Print Network [OSTI]

the external fluid mechanics of OTEC plants: report coveringthermal energy conversion ( OTEC) plants by mid-1980 1 s.distributiion at potential OTEC sites. p. 7D-4/1-4/5. In

Sullivan, S.M.

2014-01-01T23:59:59.000Z

85

Recycling of wasted energy : thermal to electrical energy conversion  

E-Print Network [OSTI]

electrode surfaces, and electric energy is stored as surfacetemperature end and electric energy is generated, thermalbeing the generated electric energy and the consumed thermal

Lim, Hyuck

2011-01-01T23:59:59.000Z

86

Graphene-based photovoltaic cells for near-field thermal energy conversion  

E-Print Network [OSTI]

Graphene-based photovoltaic cells for near-field thermal energy conversion Riccardo Messina to a photovoltaic cell can be largely enhanced because of the contribution of evanescent photons, in particular important source of energy. By approaching a photovoltaic (PV) cell3 in proximity of a thermal emitter

Paris-Sud XI, Université de

87

USE OF MIXTURES AS WORKING FLUIDS IN OCEAN THERMAL ENERGY CONVERSION CYCLES  

E-Print Network [OSTI]

Mixtures offer potential advantages over pure compounds as working fluids in ocean thermal energy conversion cycles. Power plant capital costs per unit of energy output can be reduced using mixtures because of increased thermal efficiency and/or decreased heat exchanger size requirements. Mixtures

Khan Zafar Iqbal; Kenneth E. Starling

88

Biosphere dose conversion Factor Importance and Sensitivity Analysis  

SciTech Connect (OSTI)

This report presents importance and sensitivity analysis for the environmental radiation model for Yucca Mountain, Nevada (ERMYN). ERMYN is a biosphere model supporting the total system performance assessment (TSPA) for the license application (LA) for the Yucca Mountain repository. This analysis concerns the output of the model, biosphere dose conversion factors (BDCFs) for the groundwater, and the volcanic ash exposure scenarios. It identifies important processes and parameters that influence the BDCF values and distributions, enhances understanding of the relative importance of the physical and environmental processes on the outcome of the biosphere model, includes a detailed pathway analysis for key radionuclides, and evaluates the appropriateness of selected parameter values that are not site-specific or have large uncertainty.

M. Wasiolek

2004-10-15T23:59:59.000Z

89

Impact of HFIR LEU Conversion on Beryllium Reflector Degradation Factors  

SciTech Connect (OSTI)

An assessment of the impact of low enriched uranium (LEU) conversion on the factors that may cause the degradation of the beryllium reflector is performed for the High Flux Isotope Reactor (HFIR). The computational methods, models, and tools, comparisons with previous work, along with the results obtained are documented and discussed in this report. The report documents the results for the gas and neutronic poison production, and the heating in the beryllium reflector for both the highly enriched uranium (HEU) and LEU HFIR configurations, and discusses the impact that the conversion to LEU may have on these quantities. A time-averaging procedure was developed to calculate the isotopic (gas and poisons) production in reflector. The sensitivity of this approach to different approximations is gauged and documented. The results show that the gas is produced in the beryllium reflector at a total rate of 0.304 g/cycle for the HEU configuration; this rate increases by ~12% for the LEU case. The total tritium production rate in reflector is 0.098 g/cycle for the HEU core and approximately 11% higher for the LEU core. A significant increase (up to ~25%) in the neutronic poisons production in the reflector during the operation cycles is observed for the LEU core, compared to the HEU case, for regions close to the core s horizontal midplane. The poisoning level of the reflector may increase by more than two orders of magnitude during long periods of downtime. The heating rate in the reflector is estimated to be approximately 20% lower for the LEU core than for the HEU core. The decrease is due to a significantly lower contribution of the heating produced by the gamma radiation for the LEU core. Both the isotopic (gas and neutronic poisons) production and the heating rates are spatially non-uniform throughout the beryllium reflector volume. The maximum values typically occur in the removable reflector and close to the midplane.

Ilas, Dan [ORNL

2013-10-01T23:59:59.000Z

90

MULTIMODAL VOICE CONVERSION USING NON-NEGATIVE MATRIX FACTORIZATION IN NOISY ENVIRONMENTS  

E-Print Network [OSTI]

MULTIMODAL VOICE CONVERSION USING NON-NEGATIVE MATRIX FACTORIZATION IN NOISY ENVIRONMENTS Kenta 1-1, Rokkodai, Nada, Kobe, 6578501, Japan ABSTRACT This paper presents a multimodal voice conversion with that of a conventional Gaussian Mixture Model (GMM)-based method. Index Terms-- voice conversion, multimodal, image

Takiguchi, Tetsuya

91

Voice Conversion based on Non-negative Matrix Factorization in Noisy Environments  

E-Print Network [OSTI]

Voice Conversion based on Non-negative Matrix Factorization in Noisy Environments Takao Fujii, Ryo conversion (VC) tech- nique for noisy environments. We prepared parallel exemplars (dictionary) that consist. In the proposed method, a Gaussian Mixture Model (GMM) -based conversion method is also applied to the feature

Takiguchi, Tetsuya

92

Energy Conversion of Fully Random Thermal Relaxation Times  

E-Print Network [OSTI]

Thermodynamic random processes in thermal systems are generally associated with one or several relaxation times, the inverse of which are formally homogeneous with energy. Here, we show in a precise way that the periodic modification of relaxation times during temperature-constant thermodynamic cycles can be thermodynamically beneficiary to the operator. This result holds as long as the operator who adjusts relaxation times does not attempt to control the randomness associated with relaxation times itself as a Maxwell 'demon' would do. Indirectly, our result also shows that thermal randomness appears satisfactorily described within a conventional quantum-statistical framework, and that the attempts advocated notably by Ilya Prigogine to go beyond a Hilbert space description of quantum statistics do not seem justified - at least according to the present state of our knowledge. Fundamental interpretation of randomness, either thermal or quantum mechanical, is briefly discussed.

Franois Barriquand

2005-07-26T23:59:59.000Z

93

Potential environmental consequences of ocean thermal energy conversion (OTEC) plants. A workshop  

SciTech Connect (OSTI)

The concept of generating electrical power from the temperature difference between surface and deep ocean waters was advanced over a century ago. A pilot plant was constructed in the Caribbean during the 1920's but commercialization did not follow. The US Department of Energy (DOE) earlier planned to construct a single operational 10MWe Ocean Thermal Energy Conversion (OTEC) plant by 1986. However, Public Law P.L.-96-310, the Ocean Thermal Energy Conversion Research, Development and Demonstration Act, and P.L.-96-320, the Ocean Thermal Energy Conversion Act of 1980, now call for acceleration of the development of OTEC plants, with capacities of 100 MWe in 1986, 500 MWe in 1989, and 10,000 MWe by 1999 and provide for licensing and permitting and loan guarantees after the technology has been demonstrated.

Walsh, J.J. (ed.)

1981-05-01T23:59:59.000Z

94

Conversion system overview assessment. Volume III. Solar thermal/coal or biomass derived fuels  

SciTech Connect (OSTI)

The three volumes of this report cover three distinct areas of solar energy research: solar thermoelectrics, solar-wind hybrid systems, and synthetic fuels derived with solar thermal energy. Volume III deals with the conversion of synthetic fuels with solar thermal heat. The method is a hybrid combination of solar energy with either coal or biomass. A preliminary assessment of this technology is made by calculating the cost of fuel produced as a function of the cost of coal and biomass. It is shown that within the projected ranges of coal, biomass, and solar thermal costs, there are conditions when solar synthetic fuels with solar thermal heat will become cost-competitive.

Copeland, R. J.

1980-02-01T23:59:59.000Z

95

Gender and Maternal Responsivity as Factors in Number of Conversational Turns in Adolescents with Developmental Disabilities  

E-Print Network [OSTI]

1 Gender and Maternal Responsivity as Factors in Number of Conversational Turns in Adolescents, Parlors, 3:00-4:00 PM This study examines factors that influence interactions between adolescents would take more conversational turns than boys, and that higher maternal responsivity would

96

INDIVIDUALITY-PRESERVING VOICE CONVERSION FOR ARTICULATION DISORDERS BASED ON NON-NEGATIVE MATRIX FACTORIZATION  

E-Print Network [OSTI]

- based spectral conversion using Non-negative Matrix Factorization (NMF) is applied to a voiceINDIVIDUALITY-PRESERVING VOICE CONVERSION FOR ARTICULATION DISORDERS BASED ON NON-NEGATIVE MATRIX FACTORIZATION Ryo AIHARA, Ryoichi TAKASHIMA, Tetsuya TAKIGUCHI, Yasuo ARIKI Graduate School of System

Takiguchi, Tetsuya

97

On the transition from photoluminescence to thermal emission and its implication on solar energy conversion  

E-Print Network [OSTI]

Photoluminescence (PL) is a fundamental light-matter interaction, which conventionally involves the absorption of energetic photon, thermalization and the emission of a red-shifted photon. Conversely, in optical-refrigeration the absorption of low energy photon is followed by endothermic-PL of energetic photon. Both aspects were mainly studied where thermal population is far weaker than photonic excitation, obscuring the generalization of PL and thermal emissions. Here we experimentally study endothermic-PL at high temperatures. In accordance with theory, we show how PL photon rate is conserved with temperature increase, while each photon is blue shifted. Further rise in temperature leads to an abrupt transition to thermal emission where the photon rate increases sharply. We also show how endothermic-PL generates orders of magnitude more energetic photons than thermal emission at similar temperatures. Relying on these observations, we propose and theoretically study thermally enhanced PL (TEPL) for highly eff...

Manor, Assaf; Rotschild, Carmel

2014-01-01T23:59:59.000Z

98

Economics of Ocean Thermal Energy Conversion Luis A. Vega, Ph.D.  

E-Print Network [OSTI]

Economics of Ocean Thermal Energy Conversion (OTEC) by Luis A. Vega, Ph.D. Published by the American Society of Civil Engineers (ASCE) Chapter 7 of "Ocean Energy Recovery: The State of the Art" 1992 #12;Published in Ocean Energy Recovery, pp 152-181, ASCE (1992) ii Table of Contents Tables /Figures

99

System for thermal energy storage, space heating and cooling and power conversion  

DOE Patents [OSTI]

An integrated system for storing thermal energy, for space heating and cong and for power conversion is described which utilizes the reversible thermal decomposition characteristics of two hydrides having different decomposition pressures at the same temperature for energy storage and space conditioning and the expansion of high-pressure hydrogen for power conversion. The system consists of a plurality of reaction vessels, at least one containing each of the different hydrides, three loops of circulating heat transfer fluid which can be selectively coupled to the vessels for supplying the heat of decomposition from any appropriate source of thermal energy from the outside ambient environment or from the spaces to be cooled and for removing the heat of reaction to the outside ambient environment or to the spaces to be heated, and a hydrogen loop for directing the flow of hydrogen gas between the vessels. When used for power conversion, at least two vessels contain the same hydride and the hydrogen loop contains an expansion engine. The system is particularly suitable for the utilization of thermal energy supplied by solar collectors and concentrators, but may be used with any source of heat, including a source of low-grade heat.

Gruen, Dieter M. (Downers Grove, IL); Fields, Paul R. (Chicago, IL)

1981-04-21T23:59:59.000Z

100

OCEAN THERMAL ENERGY CONVERSION PRELIMINARY DATA REPORT FOR THE NOVEMBER 1977 GOTEC-02 CRUISE TO THE GULF OF MEXICO MOBILE SITE  

E-Print Network [OSTI]

Ocean Thermal Energy Conversion (OTEC) sites in the Gulf ofBiofoul- ing and Corrosion of OTEC plants ~ Selected Sites.Thermal Energy Conversion (OTEC) Sites: Puerto Rico, St.

Commins, M.L.

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermal conversion factor" 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

Near and far field models of external fluid mechanics of Ocean Thermal Energy Conversion (OTEC) power plants  

E-Print Network [OSTI]

The world is facing the challenge of finding new renewable sources of energy - first, in response to fossil fuel reserve depletion, and second, to reduce greenhouse gas emissions. Ocean Thermal Energy Conversion (OTEC) can ...

Rodrguez Buo, Mariana

2013-01-01T23:59:59.000Z

102

Research on the external fluid mechanics of ocean thermal energy conversion plants : report covering experiments in a current  

E-Print Network [OSTI]

This report describes a set of experiments in a physical model study to explore plume transport and recirculation potential for a range of generic Ocean Thermal Energy Conversion (OTEC) plant designs and ambient conditions. ...

Fry, David J. (David James)

1981-01-01T23:59:59.000Z

103

Proceedings of the 31. intersociety energy conversion engineering conference. Volume 2: Conversion technologies, electro-chemical technologies, Stirling engines, thermal management  

SciTech Connect (OSTI)

The 148 papers contained in Volume 2 are arranged topically as follows -- (A) Conversion Technologies: Superconductivity applications; Advanced cycles; Heat engines; Heat pumps; Combustion and cogeneration; Advanced nuclear reactors; Fusion Power reactors; Magnetohydrodynamics; Alkali metal thermal to electric conversion; Thermoelectrics; Thermionic conversion; Thermophotovoltaics; Advances in electric machinery; and Sorption technologies; (B) Electrochemical Technologies: Terrestrial fuel cell technology; and Batteries for terrestrial power; (C) Stirling Engines: Stirling machine analysis; Stirling machine development and testing; and Stirling component analysis and testing; (D) Thermal Management: Cryogenic heat transfer; Electronic components and power systems; Environmental control systems; Heat pipes; Numeric analysis and code verification; and Two phase heat and mass transfer. Papers within the scope of the data base have been processed separately.

Chetty, P.R.K.; Jackson, W.D.; Dicks, E.B. [eds.

1996-12-31T23:59:59.000Z

104

Kinematic Stirling engine as an energy conversion subsystem for paraboloidal dish solar thermal power plants  

SciTech Connect (OSTI)

The potential of a suitably designed and economically manufactured Stirling engine as the energy conversion subsystem of a paraboloidal dish-Stirling solar thermal power module has been estimated. Results obtained by elementary cycle analyses have been shown to match quite well the performance characteristics of an advanced kinematic Stirling engine, the United Stirling P-40, as established by current prototypes of the engine and by a more sophisticated analytic model of its advanced derivative. In addition to performance, brief consideration has been given to other Stirling engine criteria such as durability, reliability, and serviceability. Production costs have not been considered here.

Bowyer, J.M.

1984-04-15T23:59:59.000Z

105

Exceeding the solar cell Shockley-Queisser limit via thermal up-conversion of low-energy photons  

E-Print Network [OSTI]

Maximum efficiency of ideal single-junction photovoltaic (PV) cells is limited to 33% (for one sun illumination) by intrinsic losses such as band edge thermalization, radiative recombination, and inability to absorb below-bandgap photons. This intrinsic thermodynamic limit, named after Shockley and Queisser (S-Q), can be exceeded by utilizing low-energy photons either via their electronic up-conversion or via thermophotovoltaic (TPV) conversion process. However, electronic up-conversion systems have extremely low efficiencies, and practical temperature considerations limit the operation of TPV converters to the narrow-gap PV cells. Here we develop a conceptual design of a hybrid TPV platform, which exploits thermal up-conversion of low-energy photons and is compatible with conventional silicon PV cells by using spectral and directional selectivity of the up-converter. The hybrid platform offers sunlight-to-electricity conversion efficiency exceeding that imposed by the S-Q limit on the corresponding PV cells ...

Boriskina, Svetlana V

2013-01-01T23:59:59.000Z

106

NREL's Advanced Thermal Conversion Laboratory at the Center for Buildings and Thermal Systems: On the Cutting-Edge of HVAC and CHP Technology (Revised)  

SciTech Connect (OSTI)

This brochure describes how the unique testing capabilities of NREL's Advanced Thermal Conversion Laboratory at the Center For Buildings and Thermal Systems can help industry meet the challenge of developing the next generation of heating, ventilating, and air-conditioning (HVAC) and combined heat and power (CHP) equipment and concepts.

Not Available

2005-09-01T23:59:59.000Z

107

Calculation of conversion factors for effective dose for various interventional radiology procedures  

SciTech Connect (OSTI)

Purpose: To provide dose-area-product (DAP) to effective dose (E) conversion factors for complete interventional procedures, based on in-the-field clinical measurements of DAP values and using tabulated E/DAP conversion factors for single projections available from the literature. Methods: Nine types of interventional procedures were performed on 84 patients with two angiographic systems. Different calibration curves (with and without patient table attenuation) were calculated for each DAP meter. Clinical and dosimetric parameters were recorded in-the-field for each projection and for all patients, and a conversion factor linking DAP and effective doses was derived for each complete procedure making use of published, Monte Carlo calculated conversion factors for single static projections. Results: Fluoroscopy time and DAP values for the lowest-dose procedure (biliary drainage) were approximately 3-fold and 13-fold lower, respectively, than those for the highest-dose examination (transjugular intrahepatic portosystemic shunt, TIPS). Median E/DAP conversion factors from 0.12 (abdominal percutaneous transluminal angioplasty) to 0.25 (Nephrostomy) mSvGy{sup -1} cm{sup -2} were obtained and good correlations between E and DAP were found for all procedures, with R{sup 2} coefficients ranging from 0.80 (abdominal angiography) to 0.99 (biliary stent insertion, Nephrostomy and TIPS). The DAP values obtained in this study showed general consistency with the values provided in the literature and median E values ranged from 4.0 mSv (biliary drainage) to 49.6 mSv (TIPS). Conclusions: Values of E/DAP conversion factors were derived for each procedure from a comprehensive analysis of projection and dosimetric data: they could provide a good evaluation for the stochastic effects. These results can be obtained by means of a close cooperation between different interventional professionals involved in patient care and dose optimization.

Compagnone, Gaetano; Giampalma, Emanuela; Domenichelli, Sara; Renzulli, Matteo; Golfieri, Rita [Medical Physics Department, S. Orsola-Malpighi University Hospital, Via Massarenti 9, 40138 Bologna (Italy); Radiology Department, S. Orsola-Malpighi University Hospital, Via Massarenti 9, 40138 Bologna (Italy); Medical Physics Department, S. Orsola-Malpighi University Hospital, Via Massarenti 9, 40138 Bologna (Italy); Radiology Department, S. Orsola-Malpighi University Hospital, Via Massarenti 9, 40138 Bologna (Italy)

2012-05-15T23:59:59.000Z

108

Molecular line intensities as measures of cloud masses - II. Conversion factors for specific galaxy types  

E-Print Network [OSTI]

We present theoretically-established values of the CO-to-H2 and C-to-H2 conversion factors that may be used to estimate the gas masses of external galaxies. We consider four distinct galaxy types, represented by M51, NGC 6946, M82 and SMC N27. The physical parameters that best represent the conditions within the molecular clouds in each of the galaxy types are estimated using a chi^2 analysis of several observed atomic fine structure and CO rotational lines. This analysis is explored over a wide range of density, radiation field, extinction, and other relevant parameters. Using these estimated physical conditions in methods that we have previously established, CO-to-H2 conversion factors are then computed for CO transitions up to J=9-8. For the conventional CO(1-0) transition, the computed conversion factor varies significantly below and above the canonical value for the Milky Way in the four galaxy types considered. Since atomic carbon emission is now frequently used as a probe of external galaxies, we also present, for the first time, the C-to-H2 conversion factor for this emission in the four galaxy types considered.

T. A. Bell; S. Viti; D. A. Williams

2007-04-19T23:59:59.000Z

109

2009 Guidelines to Defra / DECC's GHG Conversion Factors for Company Reporting  

E-Print Network [OSTI]

and has been produced by Nikolas Hill (AEA) for the Department of Energy and Climate Change (DECC (HGVs) 40 Light Goods Vehicles (LGVs) 44 Rail Freight 45 RoPax Ferry Freight 46 Other Marine Freight) 48 IX. OTHER UK CONVERSION FACTORS (ANNEX 9) 49 Water 50 Biofuels 50 Other bioenergy 50 Waste 51 X

110

A computational analysis of the evaporator/artery of an alkali metal thermal to electric conversion (AMTEC) PX series cell  

E-Print Network [OSTI]

, while minimizing mass. Current technology, such as Radioisotope Thermoelectric Generators (RTG's) are reliable, but do not supply the power conversion efficiencies desired for future space missions. That leads to Alkali Metal Thermal to Electric...-series cells to generate electricity for the deep space vehicle. The higher efficiency of AMTEC compared to other conversion technologies, such as Radioisotope Thermoelectric Generators (RTG's), results in less energy source material being launched...

Pyrtle, Frank

1999-01-01T23:59:59.000Z

111

OCEAN THERMAL ENERGY CONVERSION ECOLOGICAL DATA REPORT FROM 0. S. S. RESEARCHER IN GULF OF MEXICO, JULY 12-23, 1977.  

E-Print Network [OSTI]

Biofouling and Corrosion of OTEC Plants at Selected Sites.the Placement of a Moored OTEC Plant. Atlantic OceanographicThermal Energy Conversion (OTEC) Sites: Puerto Rico, St.

Quinby-Hunt, M.S.

2008-01-01T23:59:59.000Z

112

Graphene-based photovoltaic cells for near-field thermal energy conversion  

E-Print Network [OSTI]

Thermophotovoltaic devices are energy-conversion systems generating an electric current from the thermal photons radiated by a hot body. In far field, the efficiency of these systems is limited by the thermodynamic Schockley-Queisser limit corresponding to the case where the source is a black body. On the other hand, in near field, the heat flux which can be transferred to a photovoltaic cell can be several orders of magnitude larger because of the contribution of evanescent photons. This is particularly true when the source supports surface polaritons. Unfortunately, in the infrared where these systems operate, the mismatch between the surface-mode frequency and the semiconductor gap reduces drastically the potential of this technology. Here we show that graphene-based hybrid photovoltaic cells can significantly enhance the generated power paving the way to a promising technology for an intensive production of electricity from waste heat.

Riccardo Messina; Philippe Ben-Abdallah

2012-07-05T23:59:59.000Z

113

Micro/Nano-Scale Phase Change Systems for Thermal Management and Solar Energy Conversion Applications  

E-Print Network [OSTI]

Solar Energy Conversion Applications By Dusan Coso B.S. (UniversitySolar Energy Conversion Applications by Dusan Coso Doctor of Philosophy in Engineering Mechanical Engineering University

Coso, Dusan

2013-01-01T23:59:59.000Z

114

The Metallicity Dependence of the CO-to-H$_2$ Conversion Factor from Observations of Local Group Galaxies  

E-Print Network [OSTI]

High-resolution CO maps of 9 molecular clouds in IC 10 are combined with the new measurement of the distance to this nearby metal poor galaxy to measure accurately the CO-to-H2 conversion factor. The result for IC 10 is combined with published data for four other Local Group galaxies (M31, M33, NGC 6822, the SMC) to trace the dependence of the CO-to-H2 conversion factor on oxygen abundance. These data show conclusively that the CO-to-H$_2$ conversion factor increases as the metallicity of the host galaxy decreases, with the conversion factor increasing by a factor of 4.6 for a factor of 10 decrease in metallicity.

C. D. Wilson

1995-06-20T23:59:59.000Z

115

Micro/Nano-Scale Phase Change Systems for Thermal Management and Solar Energy Conversion Applications  

E-Print Network [OSTI]

S. a. , 2004, Solar Thermal Collectors and Applications,86] Schnatbaum L. , 2009, Solar Thermal Power Plants, Thefor Storage of Solar Thermal Energy, Solar Energy, 18 (3),

Coso, Dusan

2013-01-01T23:59:59.000Z

116

Micro/Nano-Scale Phase Change Systems for Thermal Management and Solar Energy Conversion Applications  

E-Print Network [OSTI]

on Sustainable thermal Energy Storage Technologies, Part I:2009, Review on Thermal Energy Storage with Phase Change2002, Survey of Thermal Energy Storage for Parabolic Trough

Coso, Dusan

2013-01-01T23:59:59.000Z

117

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

118

Micro/Nano-Scale Phase Change Systems for Thermal Management and Solar Energy Conversion Applications  

E-Print Network [OSTI]

Review on Sustainable thermal Energy Storage Technologies,D. , 2009, Review on Thermal Energy Storage with PhaseW. , 2002, Survey of Thermal Energy Storage for Parabolic

Coso, Dusan

2013-01-01T23:59:59.000Z

119

Ocean Thermal Energy Conversion Life Cycle Cost Assessment, Final Technical Report, 30 May 2012  

SciTech Connect (OSTI)

The Ocean Thermal Energy Conversion (OTEC) Life Cycle Cost Assessment (OLCCA) is a study performed by members of the Lockheed Martin (LM) OTEC Team under funding from the Department of Energy (DOE), Award No. DE-EE0002663, dated 01/01/2010. OLCCA objectives are to estimate procurement, operations and maintenance, and overhaul costs for two types of OTEC plants: -Plants moored to the sea floor where the electricity produced by the OTEC plant is directly connected to the grid ashore via a marine power cable (Grid Connected OTEC plants) -Open-ocean grazing OTEC plant-ships producing an energy carrier that is transported to designated ports (Energy Carrier OTEC plants) Costs are developed using the concept of levelized cost of energy established by DOE for use in comparing electricity costs from various generating systems. One area of system costs that had not been developed in detail prior to this analysis was the operations and sustainment (O&S) cost for both types of OTEC plants. Procurement costs, generally referred to as capital expense and O&S costs (operations and maintenance (O&M) costs plus overhaul and replacement costs), are assessed over the 30 year operational life of the plants and an annual annuity calculated to achieve a levelized cost (constant across entire plant life). Dividing this levelized cost by the average annual energy production results in a levelized cost of electricity, or LCOE, for the OTEC plants. Technical and production efficiency enhancements that could result in a lower value of the OTEC LCOE were also explored. The thermal OTEC resource for Oahu, Hawai?¢????i and projected build out plan were developed. The estimate of the OTEC resource and LCOE values for the planned OTEC systems enable this information to be displayed as energy supplied versus levelized cost of the supplied energy; this curve is referred to as an Energy Supply Curve. The Oahu Energy Supply Curve represents initial OTEC deployment starting in 2018 and demonstrates the predicted economies of scale as technology and efficiency improvements are realized and larger more economical plants deployed. Utilizing global high resolution OTEC resource assessment from the Ocean Thermal Extractable Energy Visualization (OTEEV) project (an independent DOE project), Global Energy Supply Curves were generated for Grid Connected and Energy Carrier OTEC plants deployed in 2045 when the predicted technology and efficiencies improvements are fully realized. The Global Energy Supply Curves present the LCOE versus capacity in ascending order with the richest, lowest cost resource locations being harvested first. These curves demonstrate the vast ocean thermal resource and potential OTEC capacity that can be harvested with little change in LCOE.

Martel, Laura; Smith, Paul; Rizea, Steven; Van Ryzin, Joe; Morgan, Charles; Noland, Gary; Pavlosky, Rick; Thomas, Michael

2012-06-30T23:59:59.000Z

120

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

E-Print Network [OSTI]

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

Note: This page contains sample records for the topic "thermal conversion factor" 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

Factors for conversion between human and automatic read-outs of CDMAM images  

SciTech Connect (OSTI)

Purpose: According to the European protocol for the quality control of the physical and technical aspects of mammography screening (EPQCM) image quality of digital mammography devices has to be assessed using human evaluation of the CDMAM contrast-detail phantom. This is accomplished by the determination of threshold thicknesses of gold disks with different diameters (0.08-2 mm) and revealed to be very time consuming. Therefore a software solution based on a nonprewhitening matched filter (NPW) model was developed at University of Nijmegen. Factors for the conversion from automatic to human readouts have been determined by Young et al.[Proc. SPIE 614206, 1-13 (2006) and Proc. SPIE 6913, 69131C1 (2008)] using a huge amount of data of both human and automatic readouts. These factors depend on the observer groups and are purely phenomenological. The authors present an alternative approach to determine the factors by using the Rose observer model. Methods: Their method uses the Rose theory which gives a relationship between threshold contrast, diameter of the object and number of incident photons. To estimate the conversion factors for the five diameters from 0.2 to 0.5 mm they exposed with five different current-time products which resulted in 25 equations with five unknowns. Results: The theoretical conversion factors (in dependence of the diameters) amounted to be 1.61 {+-} 0.02 (0.2 mm diameter), 1.67 {+-} 0.02 (0.25 mm), 1.85 {+-} 0.02 (0.31 mm), 2.09 {+-} 0.02 (0.4 mm), and 2.28 {+-} 0.02 (0.5 mm). The corresponding phenomenological factors found in literature are 1.74 (0.2 mm), 1.78 (0.25 mm), 1.83 (0.31 mm), 1.88 (0.4 mm), and 1.93 (0.5 mm). Conclusions: They transferred the problem of determining the factors to a well known observer model which has been examined for many years and is also well established. This method reveals to be reproduceable and produces factors comparable to the phenomenological ones.

Figl, Michael; Hoffmann, Rainer; Kaar, Marcus; Semturs, Friedrich; Brasik, Natasa; Birkfellner, Wolfgang; Homolka, Peter; Hummel, Johann [Center for medical Physics and Biomedical Engineering, Medical University of Vienna, Austria A-1090 (Austria); Department of Radiology, Medical University of Vienna, Austria A-1090 (Austria); Center for medical Physics and Biomedical Engineering, Medical University of Vienna, Austria A-1090 (Austria); Center for medical Physics and Biomedical Engineering, Medical University of Vienna, Austria A-1090 and Department of Radio-oncology, Wilhelminenspital, Vienna, Austria A-1160 (Austria)

2011-09-15T23:59:59.000Z

122

Conversion, Fragmentation,  

E-Print Network [OSTI]

YFFReview Forestland Conversion, Fragmentation, and Parcelization A summary of a forum exploring our forests today. Development and economic pressures on private lands are driving conversion the complexity of factors influencing fragmentation--for example, historic land use planning policies

123

5022 Biochemistry 1983, 22, 5022-5028 Conversion of Nerve Growth Factor-Receptor Complexes to a Slowly  

E-Print Network [OSTI]

5022 Biochemistry 1983, 22, 5022-5028 Conversion of Nerve Growth Factor-Receptor Complexes to a Slowly Dissociating, Triton X-100 Insoluble State by Anti Nerve Growth Factor Antibodied Ronald D. Vale and Eric M. Shooter* ABSTRACT: Two populations of nerve growth factor (NGF) receptors can be distinguished

Vale, Ronald D.

124

Revision of the APGEMS Dose Conversion Factor File Using Revised Factors from Federal Guidance Report 12 and 13.  

SciTech Connect (OSTI)

The Air Pollutant Graphical Environmental Monitoring System (APGEMS) is used by the Hanford Emergency Operation Center (EOC) to provide refined plume modeling of releases involving radionuclides. The dose conversion factors (DCFs) used by APGEMS to convert air concentration to dose are stored in a file called HUDUFACT.dat; the DCFs are based primarily on ICRP 30 compiled in the late 1980s. This report updates the DCFs using more recent values reported in the Environmental Protection Agencies (EPAs) Federal Guidance Report (FGR) 12 and 13. FGR 12 provides external exposure (air submersion) DCFs for radionuclides in air; FGR 13 provides DCFs for radionuclides from inhalation. DCFs were updated for only those radionuclides listed in the original HUDUFACT.dat file. Since FGR 13 provides inhalation dose conversion factors as a function of age, revised DCF files were created for APGEMS for each age group. The adult DCF file is the most relevant to compare to the original DCF file being used in APGEMS; these DCF values are compared in this report.

Hay, Tristan R.; Rishel, Jeremy P.

2013-09-30T23:59:59.000Z

125

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

E-Print Network [OSTI]

waste heat reclamation and solar thermal energy," Energy [K Lovegrove and M Dennis, "Solar thermal energy systems inK Lovegrove and M Dennis, "Solar thermal energy systems in

Ho, Tony

2012-01-01T23:59:59.000Z

126

Micro/Nano-Scale Phase Change Systems for Thermal Management and Solar Energy Conversion Applications  

E-Print Network [OSTI]

Thermal Energy Storage, Renewable and Sustainable EnergyReview on Sustainable thermal Energy Storage Technologies,Energy Storage Using Phase Change Materials, Renewable and Sustainable Energy

Coso, Dusan

2013-01-01T23:59:59.000Z

127

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

E-Print Network [OSTI]

Nonconventional Fluids," ASME Jour of Engineering for Power,fluids for Organic Rankine Cycles," Applied Thermal Engineering,fluid in waste heat recovery," Applied Thermal Engineering,

Ho, Tony

2012-01-01T23:59:59.000Z

128

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

E-Print Network [OSTI]

condenser, and low thermal efficiencies caused by low boiler pressures that are required for superheating the steam and

Ho, Tony

2012-01-01T23:59:59.000Z

129

Modeling and analysis of hybrid geothermal-solar thermal energy conversion systems  

E-Print Network [OSTI]

Innovative solar-geothermal hybrid energy conversion systems were developed for low enthalpy geothermal resources augmented with solar energy. The goal is to find cost-effective hybrid power cycles that take advantage of ...

Greenhut, Andrew David

2010-01-01T23:59:59.000Z

130

Thermal hydraulic design and analysis of a large lead-cooled reactor with flexible conversion ratio  

E-Print Network [OSTI]

This thesis contributes to the Flexible Conversion Ratio Fast Reactor Systems Evaluation Project, a part of the Nuclear Cycle Technology and Policy Program funded by the Department of Energy through the Nuclear Energy ...

Nikiforova, Anna S., S.M. Massachusetts Institute of Technology

2008-01-01T23:59:59.000Z

131

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

E-Print Network [OSTI]

128] V Minea, "Using Geothermal Energy and Industrial Wastesuch as solar thermal and geothermal energy will become ansolar field, and geothermal energy, where energy is obtained

Ho, Tony

2012-01-01T23:59:59.000Z

132

Micro/Nano-Scale Phase Change Systems for Thermal Management and Solar Energy Conversion Applications  

E-Print Network [OSTI]

Storage of Solar Thermal Energy, Solar Energy, 18 (3), pp.Power Plants, Journal of Solar Energy Engineering, 124 (2),Cycle Storage of Solar Energy, Energy & Environmental

Coso, Dusan

2013-01-01T23:59:59.000Z

133

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

E-Print Network [OSTI]

such as in solar energy and geothermal energy [183]. Solar128] V Minea, "Using Geothermal Energy and Industrial Wastesuch as solar thermal and geothermal energy will become an

Ho, Tony

2012-01-01T23:59:59.000Z

134

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

135

Where solar thermal meets photovoltaic for high-efficiency power conversion  

E-Print Network [OSTI]

To develop disruptive techniques which generate power from the Sun, one must understand the aspects of existing technologies that limit performance. Solar thermal and solar photovoltaic schemes dominate today's solar market ...

Bierman, David M. (David Matthew)

2014-01-01T23:59:59.000Z

136

The magnesium silicide germanide stannide alloy: A new concept in ocean thermal energy conversion  

SciTech Connect (OSTI)

In devices hitherto used for the direct conversion of heat into electricity, commonly known as ''thermoelectric energy converters'', the efficiency of conversion is appreciably lower than that of conventional reciprocating or rotary heat engines. This low efficiency is brought about by the physical properties of the materials selected for the manufacture of these devices. The materials that are currently being used for this purpose are either simple elements and alloys thereof, such as silicon and germanium, or intermetallic compounds, either simple or alloys and solid solutions thereof. Of the latter, mention may be made of bismuth telluride, antimony telluride, lead telluride, antimony silver telluride, lead selenide, bismuth selenide, antimony selenide, etc., as well as mixtures and solid solutions of these and other compounds. A search in respect of these materials carried out in the U.S. Patent literature indicates indeed a quite substantial and impressive record.

Nicolaou, M.C.

1983-12-01T23:59:59.000Z

137

Thermal Stability and Aging Characteristics of Chromate Conversion Coatings on Aluminum Alloy 2024-T3  

SciTech Connect (OSTI)

XANES and electrochemical impedance spectroscopes were used in parallel to correlate the amount of Cr(VI) in chromate conversion coatings (CCC) on Al 2024 and their corrosion resistance in order to understand the degradation mechanisms upon aging or heating. Cr(VI) species appear to be immobilized for temperatures higher than 80 C due to dehydration. CCC are shown to be dynamic in the first month of aging with no significant dehydration. Another degradation mechanism involving chemical changes is to be considered.

Laget, V.; Jeffcoate, C.; Isaacs, H. S.; Buchheit, R. G.

1999-10-17T23:59:59.000Z

138

A PRELIMINARY EVALUATION OF IMPINGEMENT AND ENTRAINMENT BY OCEAN THERMAL ENERGY CONVERSION (OTEC) PLANTS  

E-Print Network [OSTI]

factors including plant distance offshore, water depth, typeand entrainment by offshore 400-MW OTEC plant is small,

Sullivan, S.M.

2013-01-01T23:59:59.000Z

139

Thermal conversion of biomass to valuable fuels, chemical feedstocks and chemicals  

DOE Patents [OSTI]

A continuous process for the conversion of biomass to form a chemical feedstock is described. The biomass and an exogenous metal oxide, preferably calcium oxide, or metal oxide precursor are continuously fed into a reaction chamber that is operated at a temperature of at least 1400.degree. C. to form reaction products including metal carbide. The metal oxide or metal oxide precursor is capable of forming a hydrolizable metal carbide. The reaction products are quenched to a temperature of 800.degree. C. or less. The resulting metal carbide is separated from the reaction products or, alternatively, when quenched with water, hydolyzed to provide a recoverable hydrocarbon gas feedstock.

Peters, William A. (Lexington, MA); Howard, Jack B. (Winchester, MA); Modestino, Anthony J. (Hanson, MA); Vogel, Fredreric (Villigen PSI, CH); Steffin, Carsten R. (Herne, DE)

2009-02-24T23:59:59.000Z

140

Ocean Thermal Energy Conversion Primer L. A. Vega, Ph.D.  

E-Print Network [OSTI]

source and the heat sink required for a heat engine. A practical application is found in a system (heat engine) designed to transform the thermal energy into electricity. This is referred to as OTEC for Ocean seawater is flash-evaporated in a vacuum chamber. The resulting low-pressure steam is used to drive

Note: This page contains sample records for the topic "thermal conversion factor" 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

Conversion and correction factors for historical measurements of Iodine-131 in Hanford-area vegetation, 1945--1947: Draft  

SciTech Connect (OSTI)

This report is a result of the Hanford Environmental Dose Reconstruction (HEDR) Project whose goal is to estimate the radiation dose that individuals could have received from emissions since 1944 at the US Department of Energy's (DOE) Hanford Site near Richland, Washington. The report describes in detail the reconstructed conversion and correction factors for historical measurements of iodine-131 in Hanford-area vegetation which was collected from the beginning of October 1945 through the end of December 1947.

Mart, E.I.; Denham, D.H.; Thiede, M.E.

1993-05-01T23:59:59.000Z

142

Factors affecting thermal infrared images at selected field sites  

SciTech Connect (OSTI)

A thermal infrared (TIR) survey was conducted to locate surface ordnance in and around the Naval Ordnance Disposal Area, and a thermal anomaly was found. This report documents studies conducted to identify the position of cause of the thermal anomaly. Also included are results of a long path Fourier transform infrared survey, soil sampling activities, soil gas surveys, and buried heater studies. The results of these studies indicated that the thermal anomaly was caused by a gravel pad, which had thermal properties different than those of the surrounding soil. Results from this investigation suggest that TIR is useful for locating surface objects having a high thermal inertia compared to the surrounding terrain, but TIR is of very limited use for characterizing buried waste or other similar buried objects at the INEL.

Sisson, J.B.; Ferguson, J.S.

1993-07-01T23:59:59.000Z

143

Solar Thermoelectric Energy Conversion  

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

SOLID-STATE SOLAR-THERMAL ENERGY CONVERSION CENTER NanoEngineering Group Solar Thermoelectric Energy Conversion Gang Chen, 1 Daniel Kraemer, 1 Bed Poudel, 2 Hsien-Ping Feng, 1 J....

144

Economics of Ocean Thermal Energy Conversion (OTEC): Luis A. Vega Ph.D., National Marine Renewable Energy Center at the University of Hawai'i  

E-Print Network [OSTI]

OTC 21016 Economics of Ocean Thermal Energy Conversion (OTEC): An Update Luis A. Vega Ph and we will face a steadily diminishing petroleum supply. This situation justifies re-evaluating OTEC should begin to implement the first generation of OTEC plantships providing electricity, via submarine

145

2D Thermal Hydraulic Analysis and Benchmark in Support of HFIR LEU Conversion using COMSOL  

SciTech Connect (OSTI)

The research documented herein was funded by a research contract between the Research Reactors Division (RRD) of Oak Ridge National Laboratory (ORNL) and the University of Tennessee, Knoxville (UTK) Mechanical, Aerospace and Biomedical Engineering Department (MABE). The research was governed by a statement of work (SOW) which clearly defines nine specific tasks. This report is outlined to follow and document the results of each of these nine specific tasks. The primary goal of this phase of the research is to demonstrate, through verification and validation methods, that COMSOL is a viable simulation tool for thermal-hydraulic modeling of the High Flux Isotope Reactor (HFIR) core. A secondary goal of this two-dimensional phase of the research is to establish methodology and data base libraries that are also needed in the full three-dimensional COMSOL simulation to follow. COMSOL version 3.5a was used for all of the models presented throughout this report.

Freels, James D [ORNL; Bodey, Isaac T [ORNL; Lowe, Kirk T [ORNL; Arimilli, Rao V [ORNL

2010-09-01T23:59:59.000Z

146

Thermal to Electrical Energy Conversion of Skutterudite-Based Thermoelectric Modules  

SciTech Connect (OSTI)

The performance of thermoelectric (TE) materials has improved tremendously over the past decade. The intrinsic thermal and electrical properties of state-of-the-art TE materials demonstrate that the potential for widespread practical TE applications is very large and includes TE generators (TEGs) for automotive waste heat recovery. TE materials for automotive TEG applications must have good intrinsic performance, be thermomechanically compatible, and be chemically stable in the 400 K to 850 K temperature range. Both n-type and p-type varieties must be available at low cost, easily fabricated, and durable. They must also form robust junctions and develop good interfaces with other materials to permit efficient flows of electrical and thermal energy. Among the TE materials of interest for automotive waste heat recovery systems are the skutterudite compounds, which are the antimony-based transition-metal compounds RTE4Sb12, where R can be an alkali metal (e.g., Na, K), alkaline earth (e.g., Ba), or rare earth (e.g., La, Ce, Yb), and TE can be a transition metal (e.g., Co, Fe). We synthesized a considerable quantity of n-type and p-type skutterudites, fabricated TE modules, incorporated these modules into a prototype TEG, and tested the TEG on a production General Motors (GM) vehicle. We discuss our progress on skutterudite TE module fabrication and present module performance data for electrical power output under simulated operating conditions for automotive waste heat recovery systems. We also present preliminary durability results on our skutterudite modules.

Salvador, James R. [GM R& D and Planning, Warren, Michigan; Cho, Jung Y [GM R& D and Planning, Warren, Michigan; Ye, Zuxin [GM Research and Development Center; Moczygemba, Joshua E. [Marlow Industries, Inc; Thompson, Alan [Marlow Industries, Inc; Sharp, Jeff W. [Marlow Industries, Inc; Konig, Jan [Fraunhofer-Institute, Freiburg, Germany; Maloney, Ryan [Michigan State University; Thompson, Travis [Michigan State University; Sakamoto, Jeff [Michigan State University; Wang, Hsin [ORNL; Wereszczak, Andrew A [ORNL; Meisner, G P [General Motors Corporation-R& D

2013-01-01T23:59:59.000Z

147

Study of domestic social and economic impacts of ocean thermal energy conversion (OTEC) commercial development. Volume II. Industry profiles  

SciTech Connect (OSTI)

Econoimc profiles of the industries most affected by the construction, deployment, and operation of Ocean Thermal Energy Conversion (OTEC) powerplants are presented. Six industries which will contribute materials and/or components to the construction of OTEC plants have been identified and are profiled here. These industries are: steel industry, concrete industry, titanium metal industry, fabricated structural metals industry, fiber glass-reinforced plastics industry, and electrical transmission cable industry. The economic profiles for these industries detail the industry's history, its financial and economic characteristics, its technological and production traits, resource constraints that might impede its operation, and its relation to OTEC. Some of the historical data collected and described in the profile include output, value of shipments, number of firms, prices, employment, imports and exports, and supply-demand forecasts. For most of the profiled industries, data from 1958 through 1980 were examined. In addition, profiles are included on the sectors of the economy which will actualy construct, deploy, and supply the OTEC platforms.

None

1981-12-22T23:59:59.000Z

148

Conceptual design of an open-cycle ocean thermal energy conversion net power-producing experiment (OC-OTEC NPPE)  

SciTech Connect (OSTI)

This report describes the conceptual design of an experiment to investigate heat and mass transfer and to assess the viability of open-cycle ocean thermal energy conversion (OC-OTEC). The experiment will be developed in two stages, the Heat- and Mass-Transfer Experimental Apparatus (HMTEA) and the Net Power-Producing Experiment (NPPE). The goal for the HMTEA is to test heat exchangers. The goal for the NPPE is to experimentally verify OC-OTEC's feasibility by installing a turbine and testing the power-generating system. The design effort met the goals of both the HMTEA and the NPPE, and duplication of hardware was minimal. The choices made for the design resource water flow rates are consistent with the availability of cold and warm seawater as a result of the seawater systems upgrade carried out by the US Department of Energy (DOE), the state of Hawaii, and the Pacific International Center for High Technology Research. The choices regarding configuration of the system were made based on projected performance, degree of technical risk, schedule, and cost. The cost for the future phase of the design and the development of the HMTEA/NPPE is consistent with the projected future program funding levels. The HMTEA and NPPE were designed cooperatively by PICHTR, Argonne National Laboratory, and Solar Energy Research Institute under the guidance of DOE. The experiment will be located at the DOE's Seacoast Test Facility at the Natural Energy Laboratory of Hawaii, Kailua-Kona, Hawaii. 71 refs., 41 figs., 34 tabs.

Bharathan, D.; Green, H.J.; Link, H.F.; Parsons, B.K.; Parsons, J.M.; Zangrando, F.

1990-07-01T23:59:59.000Z

149

Application of Planck's law to thermionic conversion  

SciTech Connect (OSTI)

A simple, highly accurate, mathematical model of heat-to-electricity conversion is developed from Planck's law for the distribution of the radiant exitance of heat at a selected temperature. An electrical power curve is calculated by integration of the heat law over a selected range of electromagnetic wavelength corresponding to electrical voltage. A novel wavelength-voltage conversion factor, developed from the known wavelength-electron volt conversion factor, establishes the wavelength ({lambda}) for the integration. The Planck law is integrated within the limits {lambda} to 2{lambda}. The integration provides the ideal electrical power that is available from heat at the emitter temperature. When multiplied by a simple ratio, the calculated ideal power closely matches published thermionic converter experimental data. The thermal power model of thermionic conversion is validated by experiments with thermionic emission of ordinary electron tubes. A theoretical basis for the heat law based model of thermionic conversion is found in linear oscillator theory.

Caldwell, F.

1998-07-01T23:59:59.000Z

150

Calculation of extremity neutron fluence-to-dose equivalent conversion factors  

E-Print Network [OSTI]

) Figure 4. Comparison of NCRP 38 and Siebert and Schuhmacher quality factors. Table 2. PNNL dose equivalent averaged quality factors (Q). * Phantom Finger Wrist 30 cm ICRU sphere Composition PMMA PMMA Tissue-and-bone Tissue-and-bone PMMA PMMA... Tissue-and-bone Tissue-and-bone PM MA PMMA (???) 'Adapted from reference 53. Source Bare Cf Moderated Cf Bare Cf Moderated Cf Bare Cf Moderated Cf Bare Cf Moderated Cf Bare Cf Moderated Cf 9. 2 9. 7 9. 2 9. 7 9. 4 9. 7 9. 4 9. 7 10...

Wood-Zika, Annmarie Ruth

1997-01-01T23:59:59.000Z

151

Beam quality conversion factors for parallel-plate ionization chambers in MV photon beams  

SciTech Connect (OSTI)

Purpose: To investigate the behavior of plane-parallel ion chambers in high-energy photon beams through measurements and Monte Carlo simulations. Methods: Ten plane-parallel ion chamber types were obtained from the major ion chamber manufacturers. Absorbed dose-to-water calibration coefficients are measured for these chambers and k{sub Q} factors are determined. In the process, the behaviors of the chambers are characterized through measurements of leakage currents, chamber settling in cobalt-60, polarity and ion recombination behavior, and long-term stability. Monte Carlo calculations of the absorbed dose to the air in the ion chamber and absorbed dose to water are obtained to calculate k{sub Q} factors. Systematic uncertainties in Monte Carlo calculated k{sub Q} factors are investigated by varying material properties and chamber dimensions. Results: Chamber behavior was variable in MV photon beams, especially with regard to chamber leakage and ion recombination. The plane-parallel chambers did not perform as well as cylindrical chambers. Significant differences up to 1.5% were observed in calibration coefficients after a period of eight months although k{sub Q} factors were consistent on average within 0.17%. Chamber-to-chamber variations in k{sub Q} factors for chambers of the same type were at the 0.2% level. Systematic uncertainties in Monte Carlo calculated k{sub Q} factors ranged between 0.34% and 0.50% depending on the chamber type. Average percent differences between measured and calculated k{sub Q} factors were - 0.02%, 0.18%, and - 0.16% for 6, 10, and 25 MV beams, respectively. Conclusions: Excellent agreement is observed on average at the 0.2% level between measured and Monte Carlo calculated k{sub Q} factors. Measurements indicate that the behavior of these chambers is not adequate for their use for reference dosimetry of high-energy photon beams without a more extensive QA program than currently used for cylindrical reference-class ion chambers.

Muir, B. R.; McEwen, M. R.; Rogers, D. W. O. [Carleton Laboratory for Radiotherapy Physics, Physics Department, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario K1S 5B6 (Canada); Institute for National Measurement Standards, National Research Council of Canada, Ottawa, Ontario K1A 0R6 (Canada); Carleton Laboratory for Radiotherapy Physics, Physics Department, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario K1S 5B6 (Canada)

2012-03-15T23:59:59.000Z

152

2010 Guidelines to Defra / DECC's GHG Conversion Factors for Company Reporting  

E-Print Network [OSTI]

is available on the Defra website and has been produced by Nikolas Hill (AEA) for the Department of Energy) 34 Direct Emissions from Light Goods Vehicles (LGVs) 38 Direct Emissions from Rail Freight 39 Direct 57 Other bioenergy 58 Waste 59 X. OVERSEAS ELECTRICITY EMISSION FACTORS (ANNEX 10) 63 Summary

153

DETERMINATION OF IN-VITRO LUNG SOLUBILITY AND INTAKE-TO-DOSE CONVERSION FACTOR FOR TRITIATED LANTHANUM NICKEL ALUMINUM ALLOY  

SciTech Connect (OSTI)

A sample of tritiated lanthanum nickel aluminum alloy (LaNi4.25Al0.75 or LANA.75) similar to that used at the Savannah River Site Tritium Facilities was analyzed to estimate the particle size distribution of this metal tritide powder and the rate, at which this material dissolves in the human respiratory tract after it is inhaled. This information is used to calculate the committed effective dose received by a worker after inhaling the material. These doses, which were calculated using the same methodology given in the DOE Tritium Handbook, are presented as inhalation intake-to-dose conversion factors (DCF). The DCF for this metal tritide is less than the DCF for tritiated water and radiation worker bioassay programs designed for tritiated water are adequate to monitor for intakes of this material.

Farfan, E.; Labone, T.; Staack, G.; Cheng, Y.; Zhou, Y.; Varallo, T.

2011-11-11T23:59:59.000Z

154

Thermal hydraulic limits analysis for the MIT Research Reactor low enrichment uranium core conversion using statistical propagation of parametric uncertainties  

E-Print Network [OSTI]

The MIT Research Reactor (MITR) is evaluating the conversion from highly enriched uranium (HEU) to low enrichment uranium (LEU) fuel. In addition to the fuel element re-design from 15 to 18 plates per element, a reactor ...

Chiang, Keng-Yen

2012-01-01T23:59:59.000Z

155

Dark matter conversion as a source of boost factor for explaining the cosmic ray positron and electron excesses  

E-Print Network [OSTI]

In interacting multi-component dark matter (DM) models, if the DM components are nearly degenerate in mass and the interactions between them are strong enough, the relatively heavy DM components can be converted into lighter ones at late time after the thermal decoupling. Consequently, the relic density of the lightest DM component can be considerably enhanced at late time. This may contribute to an alternative source of boost factor required to explain the positron and electron excesses reported by the recent DM indirect search experiments such as PAMELA, Fermi-LAT and HESS etc..

Ze-Peng Liu; Yue-Liang Wu; Yu-Feng Zhou

2011-12-17T23:59:59.000Z

156

Measurements of gas sorption from seawater and the influence of gas release on open-cycle ocean thermal energy conversion (OC-OTEC) system performance  

SciTech Connect (OSTI)

The technical community has questioned the validity and cost-effectiveness of open-cycle ocean thermal energy conversion (OC-OTEC) systems because of the unknown effect of noncondensable gas on heat exchanger performance and the power needed to run vacuum equipment to remove this gas. To date, studies of seawater gas desorption have not been prototypical for system level analysis. This study gives preliminary gas desorption data on a vertical spout, direct contact evaporator and multiple condenser geometries. Results indicate that dissolved gas can be substantially removed before the seawater enters the heat exchange process, reducing the uncertainty and effect of inert gas on heat exchanger performance.

Penney, T.R.; Althof, J.A.

1985-06-01T23:59:59.000Z

157

Comment on `Update of 40K and 226Ra and 232Th series $\\gamma$-to-dose conversion factors for soil'  

E-Print Network [OSTI]

A letter to the editor of the Journal of Environmental Radioactivity on the article: E. Gasser, A. Nachab, A. Nourreddine, Ch. Roy, and A. Sellam, `Update of 40K and 226Ra and 232Th series $\\gamma$-to-dose conversion factors for soil', J. Environ. Radioactiv. 138, 68-71 (2014), DOI: 10.1016/j.jenvrad.2014.08.002.

Malins, Alex; Saito, Kimiaki

2015-01-01T23:59:59.000Z

158

Submillimeter Galaxies at z~2: Evidence for Major Mergers & Constraints on Lifetimes, IMF and CO-H2 Conversion Factor  

E-Print Network [OSTI]

We report sub-arcsecond resolution IRAM PdBI millimeter CO interferometry of four z~2 submillimeter galaxies (SMGs), and sensitive CO (3-2) flux limits toward three z~2 UV-/optically selected star forming galaxies. The new data reveal for the first time spatially resolved CO gas kinematics in the observed SMGs. Two of the SMGs show double or multiple morphologies, with complex, disturbed gas motions. The other two SMGs exhibit CO velocity gradients of ~500 km/s across 0.2 arcsec (1.6 kpc) diameter regions, suggesting that the star forming gas is in compact, rotating disks. Our data provide compelling evidence that these SMGs represent extreme, short-lived 'maximum' star forming events in highly dissipative mergers of gas rich galaxies. The resulting high mass surface and volume densities of SMGs are similar to those of compact quiescent galaxies in the same redshift range, and much higher than those in local spheroids. From the ratio of the comoving volume densities of SMGs and quiescent galaxies in the same mass and redshift ranges, and from the comparison of gas exhaustion time scales and stellar ages, we estimate that the SMG phase duration is about 100 Myrs. Our analysis of SMGs and optically/UV selected high redshift star forming galaxies supports a 'universal' Chabrier IMF as being valid over the star forming history of these galaxies. We find that the 12CO luminosity to total gas mass conversion factors at z~2-3 are probably similar to those assumed at z~0. The implied gas fractions in our sample galaxies range from 20 to 50%.

L. J. Tacconi; R. Genzel; I. Smail; R. Neri; S. C. Chapman; R. J. Ivison; A. Blain; P. Cox; A. Omont; F. Bertoldi; T. Greve; N. M. Foerster Schreiber; S. Genel; D. Lutz; A. M. Swinbank; A. E. Shapley; D. K. Erb; A. Cimatti; E. Daddi; A. J. Baker

2008-01-23T23:59:59.000Z

159

Ocean thermal energy conversion preliminary data report for the November 1977 GOTEC-02 cruise to the Gulf of Mexico Mobile Site  

SciTech Connect (OSTI)

This is the second in a series of preliminary data reports from cruises to potential Ocean Thermal Energy Conversion (OTEC) sites in the Gulf of Mexico. The data are from the GOTEC-02 cruise to a site at approximately 29/sup 0/N, 88/sup 0/W, the Mobile Site. Twelve oceanographic stations were visited. Due to bad weather, the results are scanty. The reader will note that much of the data is questionable. Current meter results are presented elsewhere (Molinari, Hazelworth and Ortman, 1979). Determinations of the biomass indicators - chlorophyll a, phaeophytins and adenosine triphosphate - and zooplankton, are presented. Results were generally those that might have been predicted from previous studies in the area.

Commins, M. L; Duncan, C. P.; Estrella, D. J.; Frisch, J. D.; Horne, A. J.; Jones, K.; Johnson, P. W.; Oldson, J. C.; Quinby-Hunt, M. S.; Ryan, C. J.; Sandusky, J. C.; Tatro, M.; Wilde, P.

1980-03-01T23:59:59.000Z

160

Spectrally selective beam splitters designed to decouple quantum and thermal solar energy conversion in hybrid concentrating systems: Final report, Phase 1 and 2  

SciTech Connect (OSTI)

The technical feasibility and flexibility of developing elements that separate concentrated solar irradiation into specific spectral regions matched to specific photoquantum processes have been shown. These elements, spectrally selective beam splitters or filters, are designed to decouple quantum and thermal solar energy conversion in hybrid concentrating systems. Both interference filters and liquid absorption filters were investigated for use as spectrally selective beam splitters. Spectral selectivity is investigated for a variety of quantum systems with various spectral windows utilizing interference and absorption filters designed. Detailed analysis of one typical quantum system is provided consisting of a model of the silicon cell photovoltaic/photothermal hybrid system using spectral selectivity. The performance benefits of this approach are shown. Interference filters show the greatest flexibility and ability to match specific spectral windows. Liquid absorption filters appear to be a lower cost option, when an appropriate spectrally selective solution that can be used as a heat transfer fluid is available. 18 refs., 88 figs., 9 tabs.

Osborn, D.E.

1988-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermal conversion factor" 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

Fabrication and testing of an infrared spectral control component for thermophotovoltaic power conversion applications  

E-Print Network [OSTI]

Thermophotovoltaic (TPV) power conversion is the direct conversion of thermal radiation to electricity. Conceptually, TPV power conversion is a very elegant means of energy conversion. A thermal source emits a radiative ...

O'Sullivan, Francis M. (Francis Martin), 1980-

2004-01-01T23:59:59.000Z

162

Solar Thermal Conversion of Biomass to Synthesis Gas: Cooperative Research and Development Final Report, CRADA Number CRD-09-00335  

SciTech Connect (OSTI)

The CRADA is established to facilitate the development of solar thermal technology to efficiently and economically convert biomass into useful products (synthesis gas and derivatives) that can replace fossil fuels. NREL's High Flux Solar Furnace will be utilized to validate system modeling, evaluate candidate reactor materials, conduct on-sun testing of the process, and assist in the development of solar process control system. This work is part of a DOE-USDA 3-year, $1M grant.

Netter, J.

2013-08-01T23:59:59.000Z

163

Conversion and correction factors for historical measurements of Iodine-131 in Hanford-area vegetation, 1945--1947: Draft. Hanford Environmental Dose Reconstruction Project  

SciTech Connect (OSTI)

This report is a result of the Hanford Environmental Dose Reconstruction (HEDR) Project whose goal is to estimate the radiation dose that individuals could have received from emissions since 1944 at the US Department of Energy`s (DOE) Hanford Site near Richland, Washington. The report describes in detail the reconstructed conversion and correction factors for historical measurements of iodine-131 in Hanford-area vegetation which was collected from the beginning of October 1945 through the end of December 1947.

Mart, E.I.; Denham, D.H.; Thiede, M.E.

1993-05-01T23:59:59.000Z

164

Energy Unit Conversion Factors / 1Joule (J) equals 1 2.78 x lO-7 9.49 x 1o-4  

E-Print Network [OSTI]

Energy Unit Conversion Factors J kWh Btu -~ / 1Joule (J) equals 1 2.78 x lO-7 9.49 x 1o-4 1.25 x lo5i Uranium = 235 (1 gram) 8.28 x lOlo 2.30 x lo4 7.84 x lo7 Deuterium (1 gram) 2.38 x 1011 6

Kostic, Milivoje M.

165

ALLSMOG: an APEX Low-redshift Legacy Survey for MOlecular Gas. I - molecular gas scaling relations, and the effect of the CO/H2 conversion factor  

E-Print Network [OSTI]

We present ALLSMOG, the APEX Low-redshift Legacy Survey for MOlecular Gas. ALLSMOG is a survey designed to observe the CO(2-1) emission line with the APEX telescope, in a sample of local galaxies (0.01 conversion factor. We find an increase in the H2/HI mass ratio with stellar mass which closely matches semi-analytic predictions. We find a mean molecular gas fraction for ALLSMOG galaxies of MH2/M* = (0.09 - 0.13),...

Bothwell, M S; Cicone, C; Maiolino, R; Mller, P; Aravena, M; De Breuck, C; Peng, Y; Espada, D; Hodge, J A; Impellizzeri, C M V; Martn, S; Riechers, D; Walter, F

2014-01-01T23:59:59.000Z

166

Conversion of Units of Measurement Gordon S. Novak Jr. \\Lambda  

E-Print Network [OSTI]

by the programmer; this can be both burdensome and error­prone, since the conversion factors used by the programmer guidelines for use of SI units and tables of conversion factors. Several books provide conversion factors, the accuracy of the conversion factors, and the algorithms that some books present for unit conversion

Novak Jr., Gordon S.

167

Experimental and Analytical Studies on Pyroelectric Waste Heat Energy Conversion  

E-Print Network [OSTI]

High-e?ciency direct conversion of heat to electrical energyJ. Yu and M. Ikura, Direct conversion of low-grade heat tois concerned with direct conversion of thermal energy into

Lee, Felix

2012-01-01T23:59:59.000Z

168

Factors affecting the microstructural stability and durability of thermal barrier coatings fabricated by air plasma spraying  

SciTech Connect (OSTI)

The high-temperature behavior of high-purity, low-density (HP-LD) air plasma sprayed (APS) thermal barrier coatings (TBCs) with NiCoCrAlY bond coats deposited by argon-shrouded plasma spraying is described. The high purity yttria-stabilized zirconia resulted in top coats which are highly resistant to sintering and transformation from the metastable tetragonal phase to the equilibrium mixture of monoclinic and cubic phases. The thermal conductivity of the as-processed TBC is low but increases during high temperature exposure even before densification occurs. The porous topcoat microstructure also resulted in good spallation resistance during thermal cycling. The actual failure mechanisms of the APS coatings were found to depend on topcoat thickness, topcoat density, and the thermal cycle frequency. The failure mechanisms are described and the durability of the HP-LD coatings is compared with that of state-of-the-art electron beam physical vapor deposition TBCs.

Helminiak, M. A. [National Energy Technology Laboratory (NETL) and Univ. of Pittsburgh, PA (United States); Yanar, N. M. [National Energy Technology Laboratory (NETL) and Univ. of Pittsburgh, PA (United States); Pettit, F. S. [National Energy Technology Laboratory (NETL) and Univ. of Pittsburgh, PA (United States); Taylor, T. A. [Praxair Surface Technologies, Inc., Indianapolis, IN (United States); Meier, G. H. [National Energy Technology Laboratory (NETL) and Univ. of Pittsburgh, PA (United States)

2012-10-01T23:59:59.000Z

170

Thermal and non-thermal energies in solar flares  

E-Print Network [OSTI]

The energy of the thermal flare plasma and the kinetic energy of the non-thermal electrons in 14 hard X-ray peaks from 9 medium-sized solar flares have been determined from RHESSI observations. The emissions have been carefully separated in the spectrum. The turnover or cutoff in the low-energy distribution of electrons has been studied by simulation and fitting, yielding a reliable lower limit to the non-thermal energy. It remains the largest contribution to the error budget. Other effects, such as albedo, non-uniform target ionization, hot target, and cross-sections on the spectrum have been studied. The errors of the thermal energy are about equally as large. They are due to the estimate of the flare volume, the assumption of the filling factor, and energy losses. Within a flare, the non-thermal/thermal ratio increases with accumulation time, as expected from loss of thermal energy due to radiative cooling or heat conduction. Our analysis suggests that the thermal and non-thermal energies are of the same magnitude. This surprising result may be interpreted by an efficient conversion of non-thermal energy to hot flare plasma.

Pascal Saint-Hilaire; Arnold O. Benz

2005-03-03T23:59:59.000Z

171

THE CO-TO-H{sub 2} CONVERSION FACTOR AND DUST-TO-GAS RATIO ON KILOPARSEC SCALES IN NEARBY GALAXIES  

SciTech Connect (OSTI)

We present ?kiloparsec spatial resolution maps of the CO-to-H{sub 2} conversion factor (?{sub CO}) and dust-to-gas ratio (DGR) in 26 nearby, star-forming galaxies. We have simultaneously solved for ?{sub CO} and the DGR by assuming that the DGR is approximately constant on kiloparsec scales. With this assumption, we can combine maps of dust mass surface density, CO-integrated intensity, and H I column density to solve for both ?{sub CO} and the DGR with no assumptions about their value or dependence on metallicity or other parameters. Such a study has just become possible with the availability of high-resolution far-IR maps from the Herschel key program KINGFISH, {sup 12}CO J = (2-1) maps from the IRAM 30 m large program HERACLES, and H I 21 cm line maps from THINGS. We use a fixed ratio between the (2-1) and (1-0) lines to present our ?{sub CO} results on the more typically used {sup 12}CO J = (1-0) scale and show using literature measurements that variations in the line ratio do not affect our results. In total, we derive 782 individual solutions for ?{sub CO} and the DGR. On average, ?{sub CO} = 3.1 M{sub ?} pc{sup 2} (K km s{sup 1}){sup 1} for our sample with a standard deviation of 0.3 dex. Within galaxies, we observe a generally flat profile of ?{sub CO} as a function of galactocentric radius. However, most galaxies exhibit a lower ?{sub CO} value in the central kiloparseca factor of ?2 below the galaxy mean, on average. In some cases, the central ?{sub CO} value can be factors of 5-10 below the standard Milky Way (MW) value of ?{sub CO,{sub MW}} = 4.4 M{sub ?} pc{sup 2} (K km s{sup 1}){sup 1}. While for ?{sub CO} we find only weak correlations with metallicity, the DGR is well-correlated with metallicity, with an approximately linear slope. Finally, we present several recommendations for choosing an appropriate ?{sub CO} for studies of nearby galaxies.

Sandstrom, K. M.; Walter, F. [Max Planck Institut fr Astronomie, Knigstuhl 17, D-69117 Heidelberg (Germany); Leroy, A. K. [National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903 (United States); Bolatto, A. D.; Wolfire, M. [Department of Astronomy, University of Maryland, College Park, MD 20742 (United States); Croxall, K. V.; Crocker, A. [Department of Physics and Astronomy, Mail Drop 111, University of Toledo, 2801 West Bancroft Street, Toledo, OH 43606 (United States); Draine, B. T.; Aniano, G. [Princeton University Observatory, Peyton Hall, Princeton, NJ 08544-1001 (United States); Wilson, C. D. [Department of Physics and Astronomy, McMaster University, Hamilton, Ontario L8S 4M1 (Canada); Calzetti, D. [Department of Astronomy, University of Massachusetts, Amherst, MA 01003 (United States); Kennicutt, R. C.; Galametz, M. [Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA (United Kingdom); Donovan Meyer, J. [Department of Physics and Astronomy, SUNY Stony Brook, Stony Brook, NY 11794-3800 (United States); Usero, A. [Observatorio Astronmico Nacional, Alfonso XII, 3, E-28014 Madrid (Spain); Bigiel, F. [Institut fr theoretische Astrophysik, Zentrum fr Astronomie der Universitt Heidelberg, Albert-Ueberle Str. 2, D-69120 Heidelberg (Germany); Brinks, E. [Centre for Astrophysics Research, University of Hertfordshire, Hatfield AL10 9AB (United Kingdom); De Blok, W. J. G. [ASTRON, The Netherlands Institute for Radio Astronomy, Postbus 2, 7990-AA Dwingeloo (Netherlands); Dale, D. [Department of Physics and Astronomy, University of Wyoming, Laramie, WY 82071 (United States); Engelbracht, C. W., E-mail: sandstrom@mpia.de [Steward Observatory, University of Arizona, Tucson, AZ 85721 (United States); and others

2013-11-01T23:59:59.000Z

172

Landholders, Residential Land Conversion, and Market Signals  

E-Print Network [OSTI]

465 Margulis: Landholders, Residential Land Conversion, and1983. An Analysis of Residential Developer Location FactorsHow Regulation Affects New Residential Development. New

Margulis, Harry L.

2006-01-01T23:59:59.000Z

173

Zinc phosphate conversion coatings  

DOE Patents [OSTI]

Zinc phosphate conversion coatings for producing metals which exhibit enhanced corrosion prevention characteristics are prepared by the addition of a transition-metal-compound promoter comprising a manganese, iron, cobalt, nickel, or copper compound and an electrolyte such as polyacrylic acid, polymethacrylic acid, polyitaconic acid and poly-L-glutamic acid to a phosphating solution. These coatings are further improved by the incorporation of Fe ions. Thermal treatment of zinc phosphate coatings to generate .alpha.-phase anhydrous zinc phosphate improves the corrosion prevention qualities of the resulting coated metal.

Sugama, Toshifumi (Wading River, NY)

1997-01-01T23:59:59.000Z

174

Zinc phosphate conversion coatings  

DOE Patents [OSTI]

Zinc phosphate conversion coatings for producing metals which exhibit enhanced corrosion prevention characteristics are prepared by the addition of a transition-metal-compound promoter comprising a manganese, iron, cobalt, nickel, or copper compound and an electrolyte such as polyacrylic acid, polymethacrylic acid, polyitaconic acid and poly-L-glutamic acid to a phosphating solution. These coatings are further improved by the incorporation of Fe ions. Thermal treatment of zinc phosphate coatings to generate {alpha}-phase anhydrous zinc phosphate improves the corrosion prevention qualities of the resulting coated metal. 33 figs.

Sugama, T.

1997-02-18T23:59:59.000Z

175

Characterization of selected Ohio coals to predict their conversion behavior relative to 104 North American Coals. [Factors correlating with liquefaction behavior  

SciTech Connect (OSTI)

Twenty-six coal samples from Ohio were collected as washed and seam samples, and lithobodies within the seams. Characterization of these samples included determination of % maceral, % anti R/sub max/, LTA, chlorine content and proximate/ultimate and qualitative mineral analyses. These data were compared to data from a similar project by Yarzab, R.F., et al., 1980 completed at Pennsylvania State University using tetralin as the hydrogen donor solvent. The characteristics of these coals were correlated with liquefaction conversion and other data accrued on 104 North American coals by statistical analyses. Utilizing percent carbon, sulfur, volatile matter, reflectance, vitrinite and total reactive macerals, Q-mode cluster analysis demonstrated that Ohio coals are more similar to the coals of the Interior province than to those of the Appalachian province. Linear multiple regression analysis for the 104 North American coals provided a prediction equation for conversion (R = .96). The predicted conversion values for the samples range from 58.8 to 79.6%, with the Lower Kittanning (No. 5) and the Middle Kittanning (No. 6) coal seams showing the highest predicted percent conversion (respectively, 73.4 and 72.2%). The moderately low FSI values for the No. 5 and No. 6 coals (respectively, 2.5 and 3) and their moderately high alkaline earth content (respectively, 0.69 and 0.74%) suggest that these coals possess the best overall properties for conversion. Stepwise regression has indicated that the most important coal characteristics affecting conversion are, in decreasing order of importance: % volatile matter, % vitrinite and % total sulfur. Conversion processes can be expected to produce higher yields with Ohio coals due to the presence of such mineral catalysts as pyrite and kaolinite. It is believed that the presence of these disposable catalysts increases the marketability of Ohio coals.

Whitacre, T. P.; Hunt, T. J.; Kneller, W. A.

1982-02-01T23:59:59.000Z

176

Solar energy conversion.  

SciTech Connect (OSTI)

If solar energy is to become a practical alternative to fossil fuels, we must have efficient ways to convert photons into electricity, fuel, and heat. The need for better conversion technologies is a driving force behind many recent developments in biology, materials, and especially nanoscience. The Sun has the enormous untapped potential to supply our growing energy needs. The barrier to greater use of the solar resource is its high cost relative to the cost of fossil fuels, although the disparity will decrease with the rising prices of fossil fuels and the rising costs of mitigating their impact on the environment and climate. The cost of solar energy is directly related to the low conversion efficiency, the modest energy density of solar radiation, and the costly materials currently required. The development of materials and methods to improve solar energy conversion is primarily a scientific challenge: Breakthroughs in fundamental understanding ought to enable marked progress. There is plenty of room for improvement, since photovoltaic conversion efficiencies for inexpensive organic and dye-sensitized solar cells are currently about 10% or less, the conversion efficiency of photosynthesis is less than 1%, and the best solar thermal efficiency is 30%. The theoretical limits suggest that we can do much better. Solar conversion is a young science. Its major growth began in the 1970s, spurred by the oil crisis that highlighted the pervasive importance of energy to our personal, social, economic, and political lives. In contrast, fossil-fuel science has developed over more than 250 years, stimulated by the Industrial Revolution and the promise of abundant fossil fuels. The science of thermodynamics, for example, is intimately intertwined with the development of the steam engine. The Carnot cycle, the mechanical equivalent of heat, and entropy all played starring roles in the development of thermodynamics and the technology of heat engines. Solar-energy science faces an equally rich future, with nanoscience enabling the discovery of the guiding principles of photonic energy conversion and their use in the development of cost-competitive new technologies.

Crabtree, G. W.; Lewis, N. S. (Materials Science Division); (California Inst. of Tech.)

2008-03-01T23:59:59.000Z

177

Preliminary draft industrial siting administration permit application: Socioeconomic factors technical report. Final technical report, November 1980-May 1982. [Proposed WyCoalGas project in Converse County, Wyoming  

SciTech Connect (OSTI)

Under the with-project scenario, WyCoalGas is projected to make a difference in the long-range future of Converse County. Because of the size of the proposed construction and operations work forces, the projected changes in employment, income, labor force, and population will alter Converse County's economic role in the region. Specifically, as growth occurs, Converse County will begin to satisfy a larger portion of its own higher-ordered demands, those that are currently being satisfied by the economy of Casper. Business-serving and household-serving activities, currently absent, will find the larger income and population base forecast to occur with the WyCoalGas project desirable. Converse County's economy will begin to mature, moving away from strict dependence on extractive industries to a more sophisticated structure that could eventually appeal to national, and certainly, regional markets. The technical demand of the WyCoalGas plant will mean a significant influx of varying occupations and skills. The creation of basic manufacturing, advanced trade and service sectors, and concomitant finance and transportation firms will make Converse County more economically autonomous. The county will also begin to serve market center functions for the smaller counties of eastern Wyoming that currently rely on Casper, Cheyenne or other distant market centers. The projected conditions expected to exist in the absence of the WyCoalGas project, the socioeconomic conditions that would accompany the project, and the differences between the two scenarios are considered. The analysis is keyed to the linkages between Converse County and Natrona County.

Not Available

1982-01-01T23:59:59.000Z

178

Nuclear modification factors of pion and light nuclei in a framework of thermal model  

E-Print Network [OSTI]

The particle yields and the nuclear modification factor ($R_{cp}$) for $\\pi^\\pm$, $p(\\bar p)$, $d(\\bar d)$, $t(\\bar t)$ and $^3He(\\bar{^3He})$ are studied in Au + Au collisions at $\\sqrt{S_{NN}}$ = 200 GeV/c based on the blast-wave model and nucleonic coalescence model. The influences of resonance decay on $p(\\bar p)$ and $\\pi$ yields, $p/\\pi$-ratio and nuclear modification factors have been discussed. An apparent number-of-constituent-quark scaling of $R_{cp}$ for $p(\\bar p)$ and $\\pi$ is presented. Similarly, the number-of-nucleon scaling of $R_{cp}$ for $p(\\bar p)$, $d(\\bar d)$, $t(\\bar t)$ and $^3He(\\bar{^3He})$ is also addressed.

Zhou, C S; Zhang, S

2015-01-01T23:59:59.000Z

179

Wind energy conversion system  

DOE Patents [OSTI]

The wind energy conversion system includes a wind machine having a propeller connected to a generator of electric power, the propeller rotating the generator in response to force of an incident wind. The generator converts the power of the wind to electric power for use by an electric load. Circuitry for varying the duty factor of the generator output power is connected between the generator and the load to thereby alter a loading of the generator and the propeller by the electric load. Wind speed is sensed electro-optically to provide data of wind speed upwind of the propeller, to thereby permit tip speed ratio circuitry to operate the power control circuitry and thereby optimize the tip speed ratio by varying the loading of the propeller. Accordingly, the efficiency of the wind energy conversion system is maximized.

Longrigg, Paul (Golden, CO)

1987-01-01T23:59:59.000Z

180

Thermally activated delayed fluorescence from {sup 3}n?* to {sup 1}n?* up-conversion and its application to organic light-emitting diodes  

SciTech Connect (OSTI)

Intense n?* fluorescence from a nitrogen-rich heterocyclic compound, 2,5,8-tris(4-fluoro-3-methylphenyl)-1,3,4,6,7,9,9b-heptaazaphenalene (HAP-3MF), is demonstrated. The overlap-forbidden nature of the n?* transition and the higher energy of the {sup 3}??* state than the {sup 3}n?* one lead to a small energy difference between the lowest singlet (S{sub 1}) and triplet (T{sub 1}) excited states of HAP-3MF. Green-emitting HAP-3MF has a moderate photoluminescence quantum yield of 0.26 in both toluene and doped film. However, an organic light-emitting diode containing HAP-3MF achieved a high external quantum efficiency of 6.0%, indicating that HAP-3MF harvests singlet excitons through a thermally activated T{sub 1} ? S{sub 1} pathway in the electroluminescent process.

Li, Jie; Zhang, Qisheng; Nomura, Hiroko [Department of Chemistry and Biochemistry, and Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395 (Japan); Miyazaki, Hiroshi [Department of Chemistry and Biochemistry, and Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395 (Japan); Functional Materials Laboratory, Nippon Steel and Sumikin Chemical Co., Ltd, 4680 Nakabaru, Sakinohama, Tobata, Kitakyushu, Fukuoka 8048503 (Japan); Adachi, Chihaya, E-mail: adachi@cstf.kyushu-u.ac.jp [Department of Chemistry and Biochemistry, and Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395 (Japan); International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395 (Japan)

2014-07-07T23:59:59.000Z

Note: This page contains sample records for the topic "thermal conversion factor" 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

Advanced nanofabrication of thermal emission devices  

E-Print Network [OSTI]

Nanofabricated thermal emission devices can be used to modify and modulate blackbody thermal radiation. There are many areas in which altering thermal radiation is extremely useful, especially in static power conversion, ...

Hurley, Fergus (Fergus Gerard)

2008-01-01T23:59:59.000Z

182

Thermal Conductivity Enhancement of High Temperature Phase Change Materials for Concentrating Solar Power Plant Applications  

E-Print Network [OSTI]

Proceedings on thermal energy storage and energy conversion;polymer microcomposites for thermal energy storage. SAE SocLow temperature thermal energy storage: a state of the art

Roshandell, Melina

2013-01-01T23:59:59.000Z

183

August 2011 Environmental Assessment of Ocean Thermal Energy  

E-Print Network [OSTI]

August 2011 1 Environmental Assessment of Ocean Thermal Energy Conversion in Hawaii Available data prompted ocean thermal energy conversion (OTEC) technology to be re-considered for use in Hawaii for OTEC development. Keywords- Ocean thermal energy conversion, OTEC, renewable energy, Hawaii

184

2009 Guidelines to Defra / DECC's GHG Conversion Factors for Company Reporting Produced by AEA for the Department of Energy and Climate Change (DECC)  

E-Print Network [OSTI]

a range of activities, including energy use, water consumption, waste disposal, recycling and transport for the Department of Energy and Climate Change (DECC) and the Department for Environment, Food and Rural Affairs (Defra) Version 2.0 Updated 30/09/2009 Key light blue = Data entry field purple = Fixed factors used

185

OCEAN THERMAL ENERGY CONVERSION PROGRAMMATIC ENVIRONMENTAL ASSESSMENT  

E-Print Network [OSTI]

l l,eve l Ventil.u:ion ( el OTEC H . . ard Level (f) Type ofW.E. and R.N. Manley, 1979. OTEC Commercialization Analysis.Assessment for Operational OTEC Platforms A Progress Report.

Sands, M.Dale

2013-01-01T23:59:59.000Z

186

Ocean Thermal Energy Conversion Mostly about USA  

E-Print Network [OSTI]

-OTEC Experimental Plant · Designs/ Lessons Learned/ EIA · Economics/Updated Resource Data · Revival (New Century) 2 offshore end 4th Attempt: CWP working some thermodynamic data obtained 5luisvega@hawaii.edu #12;#12;#12;Claude's Off Rio de Janeiro (1933) · Floating Ice Plant: 2.2 MW OC- OTEC to produce 2000 tonnes of Ice

187

Quantum optical waveform conversion  

E-Print Network [OSTI]

Currently proposed architectures for long-distance quantum communication rely on networks of quantum processors connected by optical communications channels [1,2]. The key resource for such networks is the entanglement of matter-based quantum systems with quantum optical fields for information transmission. The optical interaction bandwidth of these material systems is a tiny fraction of that available for optical communication, and the temporal shape of the quantum optical output pulse is often poorly suited for long-distance transmission. Here we demonstrate that nonlinear mixing of a quantum light pulse with a spectrally tailored classical field can compress the quantum pulse by more than a factor of 100 and flexibly reshape its temporal waveform, while preserving all quantum properties, including entanglement. Waveform conversion can be used with heralded arrays of quantum light emitters to enable quantum communication at the full data rate of optical telecommunications.

D Kielpinski; JF Corney; HM Wiseman

2010-10-11T23:59:59.000Z

188

Technical and economic feasibility of a Thermal Gradient Utilization Cycle (TGUC) power plant  

E-Print Network [OSTI]

Energy Conversion unit mass mass flow rate life of system Ocean Thermal Energy Conversion power pressure heat flow Rl R4 TGUC TP T2 total primary energy subsidy expressed as BTU input per 1000 BTU output thermal energy subsidy expressed... has grown in energy technologies that use renewable resources such as solar (thermal conversion, ocean thermal energy conversion, photovoltaics, wind and biomass conversion), geothermal and magnetohydrodynamics (MHD) . A new concept that can...

Raiji, Ashok

1980-01-01T23:59:59.000Z

189

Photovoltaic Energy Conversion  

E-Print Network [OSTI]

Photovoltaic Energy Conversion Frank Zimmermann #12;Solar Electricity Generation Consumes no fuel Make solar cells more efficient Theoretical energy conversion efficiency limit of single junction warming and fossil fuel depletion problems! #12;Photovoltaics: Explosive Growth Sustained growth of 30

Glashausser, Charles

190

Ocean Thermal Resources off the Hawaiian Islands luisvega@hawaii.edu Ocean Thermal Resources off the Hawaiian Islands  

E-Print Network [OSTI]

information to assist developers of ocean thermal energy conversion (OTEC) systems in site selection Energy Conversion The immense size of the ocean thermal resource and the baseload capability of OTECOcean Thermal Resources off the Hawaiian Islands luisvega@hawaii.edu 1 Ocean Thermal Resources off

191

Indoor Thermal Factors and Symptoms in Office Workers: Findings from the U.S. EPA BASE Study  

SciTech Connect (OSTI)

Some prior research in office buildings has associated higher indoor temperatures even within the recommended thermal comfort range with increased worker symptoms. We reexamined this relationship in data from 95 office buildings in the U.S. Environmental Protection Agency's Building Assessment Survey and Evaluation (BASE) Study. We investigated relationships between building-related symptoms and thermal metrics constructed from real-time measurements. We estimated odds ratios (ORs) and 95percent confidence intervals in adjusted logistic regression models with general estimating equations, overall and by season. Winter indoor temperatures spanned the recommended winter comfort range; summer temperatures were mostly colder than the recommended summer range. Increasing indoor temperatures, overall, were associated with increases in few symptoms. Higher winter indoor temperatures, however, were associated with increases in all symptoms analyzed. Higher summer temperatures, above 23oC, were associated with decreases in most symptoms. Humidity ratio, a metric of absolute humidity, showed few clear associations. Thus, increased symptoms with higher temperatures within the thermal comfort range were found only in winter. In summer, buildings were overcooled, and only the higher observed temperatures were within the comfort range; these were associated with decreased symptoms. Confirmation of these findings would suggest that thermal management guidelines consider health effects as well as comfort.

Mendell, Mark; Mirer, Anna

2008-06-01T23:59:59.000Z

192

Neutron Thermal Cross Sections, Westcott Factors, Resonance Integrals, Maxwellian Averaged Cross Sections and Astrophysical Reaction Rates Calculated from Major Evaluated Data Libraries  

E-Print Network [OSTI]

We present calculations of neutron thermal cross sections, Westcott factors, resonance integrals, Maxwellianaveraged cross sections and astrophysical reaction rates for 843 ENDF materials using data from the major evaluated nuclear libraries and European activation file. Extensive analysis of newly-evaluated neutron reaction cross sections, neutron covariances, and improvements in data processing techniques motivated us to calculate nuclear industry and neutron physics quantities, produce s-process Maxwellian-averaged cross sections and astrophysical reaction rates, systematically calculate uncertainties, and provide additional insights on currently available neutron-induced reaction data. Nuclear reaction calculations are discussed and new results are presented.

Pritychenko, B

2012-01-01T23:59:59.000Z

193

QUANTUM CONVERSION IN PHOTOSYNTHESIS  

E-Print Network [OSTI]

QUANTUM CONVERSION IN PHOTOSYNTHESIS Melvin Calvin Januaryas it occurs in modern photosynthesis can only take place inof the problem or photosynthesis, or any specific aspect of

Calvin, Melvin

2008-01-01T23:59:59.000Z

194

Surface Tension Mediated Conversion of Light to Work David Okawa,,  

E-Print Network [OSTI]

to a high energy intermediate (e.g., electrical potential, thermal loading, or chemical fuel), which- taics for conversion to electricity, solar thermal for water heating, fast growing plants to produce rely on weak momentum transfer from photons. Harnessing the energy of photons is a far more powerful

Zettl, Alex

195

Object Closure Conversion * Neal Glew  

E-Print Network [OSTI]

of closure conversion. This paper argues that a direct formulation of object closure conversio* *n Object Closure Conversion * Neal into closed code and auxiliary data* * structures. Closure conversion has been extensively studied

Glew, Neal

196

Biomass Thermochemical Conversion Program. 1984 annual report  

SciTech Connect (OSTI)

The objective of the program is to generate scientific data and conversion process information that will lead to establishment of cost-effective process for converting biomass resources into clean fuels. The goal of the program is to develop the data base for biomass thermal conversion by investigating the fundamental aspects of conversion technologies and by exploring those parameters that are critical to the conversion processes. The research activities can be divided into: (1) gasification technology; (2) liquid fuels technology; (3) direct combustion technology; and (4) program support activities. These activities are described in detail in this report. Outstanding accomplishments during fiscal year 1984 include: (1) successful operation of 3-MW combustor/gas turbine system; (2) successful extended term operation of an indirectly heated, dual bed gasifier for producing medium-Btu gas; (3) determination that oxygen requirements for medium-Btu gasification of biomass in a pressurized, fluidized bed gasifier are low; (4) established interdependence of temperature and residence times on biomass pyrolysis oil yields; and (5) determination of preliminary technical feasibility of thermally gasifying high moisture biomass feedstocks. A bibliography of 1984 publications is included. 26 figs., 1 tab.

Schiefelbein, G.F.; Stevens, D.J.; Gerber, M.A.

1985-01-01T23:59:59.000Z

197

DANISHBIOETHANOLCONCEPT Biomass conversion for  

E-Print Network [OSTI]

DANISHBIOETHANOLCONCEPT Biomass conversion for transportation fuel Concept developed at RIS? and DTU Anne Belinda Thomsen (RIS?) Birgitte K. Ahring (DTU) #12;DANISHBIOETHANOLCONCEPT Biomass: Biogas #12;DANISHBIOETHANOLCONCEPT Pre-treatment Step Biomass is macerated The biomass is cut in small

198

Conversion Plan | Department of Energy  

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

document the conversion plan that clearly defines the system or project's conversion procedures; outlines the installation of new and converted filesdatabases; coordinates the...

199

Structured luminescence conversion layer  

DOE Patents [OSTI]

An apparatus device such as a light source is disclosed which has an OLED device and a structured luminescence conversion layer deposited on the substrate or transparent electrode of said OLED device and on the exterior of said OLED device. The structured luminescence conversion layer contains regions such as color-changing and non-color-changing regions with particular shapes arranged in a particular pattern.

Berben, Dirk; Antoniadis, Homer; Jermann, Frank; Krummacher, Benjamin Claus; Von Malm, Norwin; Zachau, Martin

2012-12-11T23:59:59.000Z

200

A preliminary analysis of comparable cooling-thermal loading-reservoir ownership as a factor in annual recreation attendance  

E-Print Network [OSTI]

the reservoir sought alternatives to private or personal investment and opted for a grant or long term lease of their holdings to the Texas Parks and Wildlife system. In the case of Fairfield reservoir, the 25 Texas Utility Generating Company granted 1200... tion of primary data vev'aIeu lnformat'on concer ning the following factors: (1) access (2) contig- uous surrounding lands (3) grazing leases (4) lake frrnt leases (5) water quality (6) recreation facilities (7) recreation opportunities and (8) law...

Darga, Thomas Jerome

1978-01-01T23:59:59.000Z

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


201

Environmental Radioactivity 56 (2001) 327340 Radon progeny dose conversion coefficients for  

E-Print Network [OSTI]

Journal of Environmental Radioactivity 56 (2001) 327­340 Radon progeny dose conversion coefficients; Dose conversion coefficients; Scaling factors; Radon progeny 1. Introduction Epidemiological studies cancer associated with exposure to radon progeny (Lubin, 1988). More recently, Lubin et al (1994

Yu, K.N.

202

Carbohydrate Derived-Pseudo-Lignin Can Retard Cellulose Biological Conversion  

E-Print Network [OSTI]

ARTICLE Carbohydrate Derived-Pseudo-Lignin Can Retard Cellulose Biological Conversion Rajeev Kumar degradation products, collectively termed as chars and/or pseudo-lignin. In order to understand the factors derived pseudo-lignin on cellulose conversion at the moderate to low enzyme loadings necessary

California at Riverside, University of

203

Digital optical conversion module  

DOE Patents [OSTI]

A digital optical conversion module used to convert an analog signal to a computer compatible digital signal including a voltage-to-frequency converter, frequency offset response circuitry, and an electrical-to-optical converter. Also used in conjunction with the digital optical conversion module is an optical link and an interface at the computer for converting the optical signal back to an electrical signal. Suitable for use in hostile environments having high levels of electromagnetic interference, the conversion module retains high resolution of the analog signal while eliminating the potential for errors due to noise and interference. The module can be used to link analog output scientific equipment such as an electrometer used with a mass spectrometer to a computer.

Kotter, Dale K. (North Shelley, ID); Rankin, Richard A. (Ammon, ID)

1991-02-26T23:59:59.000Z

204

Digital optical conversion module  

DOE Patents [OSTI]

A digital optical conversion module used to convert an analog signal to a computer compatible digital signal including a voltage-to-frequency converter, frequency offset response circuitry, and an electrical-to-optical converter. Also used in conjunction with the digital optical conversion module is an optical link and an interface at the computer for converting the optical signal back to an electrical signal. Suitable for use in hostile environments having high levels of electromagnetic interference, the conversion module retains high resolution of the analog signal while eliminating the potential for errors due to noise and interference. The module can be used to link analog output scientific equipment such as an electrometer used with a mass spectrometer to a computer. 2 figs.

Kotter, D.K.; Rankin, R.A.

1988-07-19T23:59:59.000Z

205

Proceedings of the 25th intersociety energy conversion engineering conference  

SciTech Connect (OSTI)

This book contains the proceedings of the 25th Intersociety Energy Conversion Engineering Conference. Volume 5 is organized under the following headings: Photovoltaics I, Photovoltaics II, Geothermal power, Thermochemical conversion of biomass, Energy from waste and biomass, Solar thermal systems for environmental applications, Solar thermal low temperature systems and components, Solar thermal high temperature systems and components, Wind systems, Space power sterling technology Stirling cooler developments, Stirling solar terrestrial I, Stirling solar terrestrial II, Stirling engine generator sets, Stirling models and simulations, Stirling engine analysis, Stirling models and simulations, Stirling engine analysis, Stirling engine loss understanding, Novel engine concepts, Coal conversion and utilization, Power cycles, MHD water propulsion I, Underwater vehicle powerplants - performance, MHD underwater propulsion II, Nuclear power, Update of advanced nuclear power reactor concepts.

Nelson, P.A.; Schertz, W.W.; Till, R.H.

1990-01-01T23:59:59.000Z

206

Ultra-Low Thermal Conductivity in W/Al2O3 Nanolaminates  

E-Print Network [OSTI]

conversion (3). Conversely, the thermal resistance of interfaces degrades the performance of materials dissimilar materials may provide a route for the production of thermal barriers with ultra-low thermal and improve the performance of thermal bar- riers (2) and of materials used in thermoelec- tric energy

George, Steven M.

207

Modeling Energy Recovery Using Thermoelectric Conversion Integrated with an Organic Rankine Bottoming Cycle  

SciTech Connect (OSTI)

Hot engine exhaust represents a resource that is often rejected to the environment without further utilization. This resource is most prevalent in the transportation sector, but stationary engine-generator systems also typically do not utilize this resource. Engine exhaust is a source of high grade thermal energy that can potentially be utilized by various approaches to produce electricity or to drive heating and cooling systems. This paper describes a model system that employs thermoelectric conversion as a topping cycle integrated with an organic Rankine bottoming cycle for waste heat utilization. This approach is being developed to fully utilize the thermal energy contained in hot exhaust streams. The model is composed of a high temperature heat exchanger which extracts thermal energy for driving the thermoelectric conversion elements. However, substantial sensible heat remains in the exhaust stream after emerging from the heat exchanger. The model incorporates a closely integrated bottoming cycle to utilize this remaining thermal energy in the exhaust stream. The model has many interacting parameters that define combined system quantities such as overall output power, efficiency, and total energy utilization factors. In addition, the model identifies a maximum power operating point for the system. That is, the model can identify the optimal amount of heat to remove from the exhaust flow to run through the thermoelectric elements. Removing too much or too little heat from the exhaust stream in this stage will reduce overall cycle performance. The model has been developed such that heat exchanger UAh values, thermal resistances, ZT values, and multiple thermoelectric elements can be investigated in the context of system operation. The model also has the ability to simultaneously determine the effect of each cycle design parameter on the performance of the overall system, thus giving the ability to utilize as much waste heat as possible. Key analysis results are presented showing the impact of critical design parameters on power output, system performance and inter-relationships between design parameters in governing performance.

Miller, Erik W.; Hendricks, Terry J.; Peterson, Richard B.

2009-07-01T23:59:59.000Z

208

Microsecond switchable thermal antenna  

SciTech Connect (OSTI)

We propose a thermal antenna that can be actively switched on and off at the microsecond scale by means of a phase transition of a metal-insulator material, the vanadium dioxide (VO{sub 2}). This thermal source is made of a periodically patterned tunable VO{sub 2} nanolayer, which support a surface phonon-polariton in the infrared range in their crystalline phase. Using electrodes properly registered with respect to the pattern, the VO{sub 2} phase transition can be locally triggered by ohmic heating so that the surface phonon-polariton can be diffracted by the induced grating, producing a highly directional thermal emission. Conversely, when heating less, the VO{sub 2} layers cool down below the transition temperature, the surface phonon-polariton cannot be diffracted anymore so that thermal emission is inhibited. This switchable antenna could find broad applications in the domain of active thermal coatings or in those of infrared spectroscopy and sensing.

Ben-Abdallah, Philippe, E-mail: pba@institutoptique.fr; Benisty, Henri; Besbes, Mondher [Laboratoire Charles Fabry, UMR 8501, Institut d'Optique, CNRS, Universit Paris-Sud 11, 2, Avenue Augustin Fresnel, 91127 Palaiseau Cedex (France)

2014-07-21T23:59:59.000Z

209

Tuning energy transport in solar thermal systems using nanostructured materials  

E-Print Network [OSTI]

Solar thermal energy conversion can harness the entire solar spectrum and theoretically achieve very high efficiencies while interfacing with thermal storage or back-up systems for dispatchable power generation. Nanostructured ...

Lenert, Andrej

2014-01-01T23:59:59.000Z

210

Campus Conversations: CLIMATE CHANGE  

E-Print Network [OSTI]

review and input from scholars with expertise in climate change and communication. #12; Welcome Thank youCampus Conversations: CLIMATE CHANGE AND THE CAMPUS Southwestern Pennsylvania Program booklet is an adaptation and updating of Global Warming and Climate Change, a brochure developed in 1994

Attari, Shahzeen Z.

211

ENERGY CONVERSION Spring 2011  

E-Print Network [OSTI]

on energy storage devices Course Webpage: http://www.sfu.ca/~mbahrami/ENSC 461.htm Tutorials for this course. Lab information is posted on the website. Laboratory report requirements, background and a lab1 ENSC 461 ENERGY CONVERSION Spring 2011 Instructor: Dr. Majid Bahrami 4372 Email

Bahrami, Majid

212

Thermal stability of nano-structured selective emitters for thermophotovoltaic systems  

E-Print Network [OSTI]

A fundamental challenge in solar-thermal-electrical energy conversion is the thermal stability of materials and devices at high operational temperatures. This study focuses on the thermal stability of tungsten selective ...

Lee, Heon Ju, 1977-

2012-01-01T23:59:59.000Z

213

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

SciTech Connect (OSTI)

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

None

2012-01-11T23:59:59.000Z

214

Thermochemical conversion of waste materials to valuable products  

SciTech Connect (OSTI)

The potential offered by a large variety of solid and liquid wastes for generating value added products is widely recognized. Extensive research and development has focused on developing technologies to recover energy and valuable products from waste materials. These treatment technologies include use of waste materials for direct combustion, upgrading the waste materials into useful fuel such as fuel gas or fuel oil, and conversion of waste materials into higher value products for the chemical industry. Thermal treatment in aerobic (with oxygen) conditions or direct combustion of waste materials in most cases results in generating air pollution and thereby requiring installation of expensive control devices. Thermochemical conversion in aerobic (without oxygen) conditions, referred to as thermal decomposition (destructive distillation) results in formation of usable liquid, solid, and gaseous products. Thermochemical conversion includes gasification, liquefaction, and thermal decomposition (pyrolysis). Each thermochemical conversion process yields a different range of products and this paper will discuss thermal decomposition in detail. This paper will also present results of a case study for recovering value added products, in the form of a liquid, solid, and gas, from thermal decomposition of waste oil and scrap tires. The product has a high concentration of benzene, xylene, and toluene. The solid product has significant amounts of carbon black and can be used as an asphalt modifier for road construction. The gas product is primarily composed of methane and is used for heating the reactor.

Saraf, S. [Engineering Technologies, Lombard, IL (United States)

1997-12-31T23:59:59.000Z

215

A Comparison of Iron and Steel Production Energy Use and Energy Intensity in China and the U.S.  

E-Print Network [OSTI]

A: Thermal Unit Conversion Factors. Washington, DC: EIA.A: Thermal Unit Conversion Factors. Washington, DC: EIA.Appendix Table 43: Unit conversion factors From this unit

Hasanbeigi, Ali

2012-01-01T23:59:59.000Z

216

Ocean energy conversion systems annual research report  

SciTech Connect (OSTI)

Alternative power cycle concepts to the closed-cycle Rankine are evaluated and those that show potential for delivering power in a cost-effective and environmentally acceptable fashion are explored. Concepts are classified according to the ocean energy resource: thermal, waves, currents, and salinity gradient. Research projects have been funded and reported in each of these areas. The lift of seawater entrained in a vertical steam flow can provide potential energy for a conventional hydraulic turbine conversion system. Quantification of the process and assessment of potential costs must be completed to support concept evaluation. Exploratory development is being completed in thermoelectricity and 2-phase nozzles for other thermal concepts. Wave energy concepts are being evaluated by analysis and model testing with present emphasis on pneumatic turbines and wave focussing. Likewise, several conversion approaches to ocean current energy are being evaluated. The use of salinity resources requires further research in membranes or the development of membraneless processes. Using the thermal resource in a Claude cycle process as a power converter is promising, and a program of R and D and subsystem development has been initiated to provide confirmation of the preliminary conclusion.

Not Available

1981-03-01T23:59:59.000Z

217

Wind Energy Conversion Systems (Minnesota)  

Broader source: Energy.gov [DOE]

This section distinguishes between large (capacity 5,000 kW or more) and small (capacity of less than 5,000 kW) wind energy conversion systems (WECS), and regulates the siting of large conversion...

218

Thermal Fluids  

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

Thermal Fluids The Thermal Fluids and Heat Transfer program works on thermal hydraulic reactor safety code development and experimental heat transferthermal hydraulics. The...

219

Voice Conversion Jani Nurminen1, Hanna Siln2, Victor Popa2,  

E-Print Network [OSTI]

of voice conversion, it is essential to understand the factors that determine the perceived speaker0 Voice Conversion Jani Nurminen1, Hanna Silén2, Victor Popa2, Elina Helander2 and Moncef Gabbouj2 1Accenture 2Tampere University of Technology Finland 1. Introduction Voice conversion (VC

Gabbouj, Moncef

220

Mechanical properties of WC10Co cemented carbides sintered from nanocrystalline spray conversion processed powders  

E-Print Network [OSTI]

Mechanical properties of WC±10Co cemented carbides sintered from nanocrystalline spray conversion as the spray conversion process [2]. The WC particle sizes in powders fabricated by the spray conversion: microstructural parameters such as WC grain size, Co mean free path and WC/WC contiguity; chemical factors

Hong, Soon Hyung

Note: This page contains sample records for the topic "thermal conversion factor" 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

Object Closure Conversion Cornell University  

E-Print Network [OSTI]

that a direct formulation of object closure conversion is interesting and gives further insight into generalObject Closure Conversion Neal Glew Cornell University 24 August 1999 Abstract An integral part of implementing functional languages is closure conversion--the process of converting code with free variables

Glew, Neal

222

Conversion of Questionnaire Data  

SciTech Connect (OSTI)

During the survey, respondents are asked to provide qualitative answers (well, adequate, needs improvement) on how well material control and accountability (MC&A) functions are being performed. These responses can be used to develop failure probabilities for basic events performed during routine operation of the MC&A systems. The failure frequencies for individual events may be used to estimate total system effectiveness using a fault tree in a probabilistic risk analysis (PRA). Numeric risk values are required for the PRA fault tree calculations that are performed to evaluate system effectiveness. So, the performance ratings in the questionnaire must be converted to relative risk values for all of the basic MC&A tasks performed in the facility. If a specific material protection, control, and accountability (MPC&A) task is being performed at the 'perfect' level, the task is considered to have a near zero risk of failure. If the task is performed at a less than perfect level, the deficiency in performance represents some risk of failure for the event. As the degree of deficiency in performance increases, the risk of failure increases. If a task that should be performed is not being performed, that task is in a state of failure. The failure probabilities of all basic events contribute to the total system risk. Conversion of questionnaire MPC&A system performance data to numeric values is a separate function from the process of completing the questionnaire. When specific questions in the questionnaire are answered, the focus is on correctly assessing and reporting, in an adjectival manner, the actual performance of the related MC&A function. Prior to conversion, consideration should not be given to the numeric value that will be assigned during the conversion process. In the conversion process, adjectival responses to questions on system performance are quantified based on a log normal scale typically used in human error analysis (see A.D. Swain and H.E. Guttmann, 'Handbook of Human Reliability Analysis with Emphasis on Nuclear Power Plant Applications,' NUREG/CR-1278). This conversion produces the basic event risk of failure values required for the fault tree calculations. The fault tree is a deductive logic structure that corresponds to the operational nuclear MC&A system at a nuclear facility. The conventional Delphi process is a time-honored approach commonly used in the risk assessment field to extract numerical values for the failure rates of actions or activities when statistically significant data is absent.

Powell, Danny H [ORNL] [ORNL; Elwood Jr, Robert H [ORNL] [ORNL

2011-01-01T23:59:59.000Z

223

Semiconductor Nanowires and Nanotubes for Energy Conversion  

E-Print Network [OSTI]

Nanowires and Nanotubes for Energy Conversion By MelissaNanowires and Nanotubes for Energy Conversion by MelissaNanowires and Nanotubes for Energy Conversion by Melissa

Fardy, Melissa Anne

2010-01-01T23:59:59.000Z

224

Sandia National Laboratories: Wavelength Conversion Materials  

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

TechnologiesWavelength Conversion Materials Wavelength Conversion Materials Overview of SSL Wavelength Conversion Materials Rare-Earth Phosphors Inorganic phosphors doped with...

225

Sandia National Laboratories: Wavelength Conversion Materials  

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

EFRCOverviewWavelength Conversion Materials Wavelength Conversion Materials Overview of SSL Wavelength Conversion Materials Rare-Earth Phosphors Inorganic phosphors doped with...

226

Thermal synthesis apparatus  

DOE Patents [OSTI]

An apparatus for thermal conversion of one or more reactants to desired end products includes an insulated reactor chamber having a high temperature heater such as a plasma torch at its inlet end and, optionally, a restrictive convergent-divergent nozzle at its outlet end. In a thermal conversion method, reactants are injected upstream from the reactor chamber and thoroughly mixed with the plasma stream before entering the reactor chamber. The reactor chamber has a reaction zone that is maintained at a substantially uniform temperature. The resulting heated gaseous stream is then rapidly cooled by passage through the nozzle, which "freezes" the desired end product(s) in the heated equilibrium reaction stage, or is discharged through an outlet pipe without the convergent-divergent nozzle. The desired end products are then separated from the gaseous stream.

Fincke, James R. (Idaho Falls, ID) [Idaho Falls, ID; Detering, Brent A. (Idaho Falls, ID) [Idaho Falls, ID

2009-08-18T23:59:59.000Z

227

Probing the Role of PrP Repeats in Conformational Conversion and Amyloid Assembly of Chimeric Yeast Prions*S  

E-Print Network [OSTI]

a relatively good understanding of the factors that guide the conformational conversion of the Sup35 prion conversion of the protein Sup35, a translation termina- tion factor. In its prion conformation, Sup35Probing the Role of PrP Repeats in Conformational Conversion and Amyloid Assembly of Chimeric Yeast

Lindquist, Susan

228

Improving efficiency of thermoelectric energy conversion devices is a major  

E-Print Network [OSTI]

Abstract · Improving efficiency of thermoelectric energy conversion devices is a major challenge Interdisciplinary Program in Material Science Thermal Physics Lab Vanderbilt University, Nashville, TN 2 S T ZT dominates over increase in Seebeck coefficient leading to poor device performance. Thermoelectric figure

Walker, D. Greg

229

Evaluation of ethane as a power conversion system working fluid for fast reactors  

E-Print Network [OSTI]

A supercritical ethane working fluid Brayton power conversion system is evaluated as an alternative to carbon dioxide. The HSC chemical kinetics code was used to study thermal dissociation and chemical interactions for ...

Perez, Jeffrey A

2008-01-01T23:59:59.000Z

230

Development and Analysis of Advanced High-Temperature Technology for Nuclear Heat Transport and Power Conversion  

SciTech Connect (OSTI)

This project by the Thermal Hydraulics Research Laboratory at U.C. Berkeley Studied advanced high-temperature heat transport and power conversion technology, in support of the Nuclear Hydrogen Initiative and Generation IV.

Per F. Peterson

2010-03-01T23:59:59.000Z

231

Solar Thermoelectric Energy Conversion | Department of Energy  

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

Solar Thermoelectric Energy Conversion Solar Thermoelectric Energy Conversion Efficiencies of different types of solar thermoelectric generators were predicted using theoretical...

232

Energy conversion system  

DOE Patents [OSTI]

The energy conversion system includes a photo-voltaic array for receiving solar radiation and converting such radiation to electrical energy. The photo-voltaic array is mounted on a stretched membrane that is held by a frame. Tracking means for orienting the photo-voltaic array in predetermined positions that provide optimal exposure to solar radiation cooperate with the frame. An enclosure formed of a radiation transmissible material includes an inside containment space that accommodates the photo-voltaic array on the stretched membrane, the frame and the tracking means, and forms a protective shield for all such components. The enclosure is preferably formed of a flexible inflatable material and maintains its preferred form, such as a dome, under the influence of a low air pressure furnished to the dome. Under this arrangement the energy conversion system is streamlined for minimizing wind resistance, sufficiently weatherproof for providing protection against weather hazards such as hail, capable of using diffused light, lightweight for low-cost construction, and operational with a minimal power draw.

Murphy, Lawrence M. (Lakewood, CO)

1987-01-01T23:59:59.000Z

233

Energy conversion system  

DOE Patents [OSTI]

The energy conversion system includes a photo-voltaic array for receiving solar radiation and converting such radiation to electrical energy. The photo-voltaic array is mounted on a stretched membrane that is held by a frame. Tracking means for orienting the photo-voltaic array in predetermined positions that provide optimal exposure to solar radiation cooperate with the frame. An enclosure formed of a radiation transmissible material includes an inside containment space that accommodates the photo-voltaic array on the stretched membrane, the frame and the tracking means, and forms a protective shield for all such components. The enclosure is preferably formed of a flexible inflatable material and maintains its preferred form, such as a dome, under the influence of a low air pressure furnished to the dome. Under this arrangement the energy conversion system is streamlined for minimizing wind resistance, sufficiently weathproof for providing protection against weather hazards such as hail, capable of using diffused light, lightweight for low-cost construction and operational with a minimal power draw.

Murphy, L.M.

1985-09-16T23:59:59.000Z

234

Flexible Conversion Ratio Fast Reactor Systems Evaluation  

SciTech Connect (OSTI)

Conceptual designs of lead-cooled and liquid salt-cooled fast flexible conversion ratio reactors were developed. Both concepts have cores reated at 2400 MWt placed in a large-pool-type vessel with dual-free level, which also contains four intermediate heat exchanges coupling a primary coolant to a compact and efficient supercritical CO2 Brayton cycle power conversion system. Decay heat is removed passively using an enhanced Reactor Vessel Auxiliary Cooling System and a Passive Secondary Auxiliary Cooling System. The most important findings were that (1) it is feasible to design the lead-cooled and salt-cooled reactor with the flexible conversion ratio (CR) in the range of CR=0 and CR=1 n a manner that achieves inherent reactor shutdown in unprotected accidents, (2) the salt-cooled reactor requires Lithium thermal Expansion Modules to overcme the inherent salt coolant's large positive coolant temperature reactivity coefficient, (3) the preferable salt for fast spectrum high power density cores is NaCl-Kcl-MgCl2 as opposed to fluoride salts due to its better themal-hydraulic and neutronic characteristics, and (4) both reactor, but attain power density 3 times smaller than that of the sodium-cooled reactor.

Neil Todreas; Pavel Hejzlar

2008-06-30T23:59:59.000Z

235

Wind energy conversion system  

SciTech Connect (OSTI)

This patent describes a wind energy conversion system comprising: a propeller rotatable by force of wind; a generator of electricity mechanically coupled to the propeller for converting power of the wind to electric power for use by an electric load; means coupled between the generator and the electric load for varying the electric power drawn by the electric load to alter the electric loading of the generator; means for electro-optically sensing the speed of the wind at a location upwind from the propeller; and means coupled between the sensing means and the power varying means for operating the power varying means to adjust the electric load of the generator in accordance with a sensed value of wind speed to thereby obtain a desired ratio of wind speed to the speed of a tip of a blade of the propeller.

Longrigg, P.

1987-03-17T23:59:59.000Z

236

Introduction to Solar Photon Conversion  

SciTech Connect (OSTI)

The efficient and cost-effective direct conversion of solar photons into solar electricity and solar fuels is one of the most important scientific and technological challenges of this century. It is estimated that at least 20 terawatts of carbon-free energy (1 and 1/2 times the total amount of all forms of energy consumed today globally), in the form of electricity and liquid and gaseous fuels, will be required by 2050 in order to avoid the most serious consequences of global climate change and to ensure adequate global energy supply that will avoid economic chaos. But in order for solar energy to contribute a major fraction of future carbon-free energy supplies, it must be priced competitively with, or perhaps even be less costly than, energy from fossil fuels and nuclear power as well as other renewable energy resources. The challenge of delivering very low-cost solar fuels and electricity will require groundbreaking advances in both fundamental and applied science. This Thematic Issue on Solar Photon Conversion will provide a review by leading researchers on the present status and prognosis of the science and technology of direct solar photoconversion to electricity and fuels. The topics covered include advanced and novel concepts for low-cost photovoltaic (PV) energy based on chemistry (dye-sensitized photoelectrodes, organic and molecular PV, multiple exciton generation in quantum dots, singlet fission), solar water splitting, redox catalysis for water oxidation and reduction, the role of nanoscience and nanocrystals in solar photoconversion, photoelectrochemical energy conversion, and photoinduced electron transfer. The direct conversion of solar photons to electricity via photovoltaic (PV) cells is a vital present-day commercial industry, with PV module production growing at about 75%/year over the past 3 years. However, the total installed yearly averaged energy capacity at the end of 2009 was about 7 GW-year (0.2% of global electricity usage). Thus, there is potential for the PV industry to grow enormously in the future (by factors of 100-300) in order for it to provide a significant fraction of total global electricity needs (currently about 3.5 TW). Such growth will be greatly facilitated by, and probably even require, major advances in the conversion efficiency and cost reduction for PV cells and modules; such advances will depend upon advances in PV science and technology, and these approaches are discussed in this Thematic Issue. Industrial and domestic electricity utilization accounts for only about 30% of the total energy consumed globally. Most ({approx}70%) of our energy consumption is in the form of liquid and gaseous fuels. Presently, solar-derived fuels are produced from biomass (labeled as biofuels) and are generated through biological photosynthesis. The global production of liquid biofuels in 2009 was about 1.6 million barrels/day, equivalent to a yearly output of about 2.5 EJ (about 1.3% of global liquid fuel utilization). The direct conversion of solar photons to fuels produces high-energy chemical products that are labeled as solar fuels; these can be produced through nonbiological approaches, generally called artificial photosynthesis. The feedstocks for artificial photosynthesis are H{sub 2}O and CO{sub 2}, either reacting as coupled oxidation-reduction reactions, as in biological photosynthesis, or by first splitting H{sub 2}O into H{sub 2} and O{sub 2} and then reacting the solar H{sub 2} with CO{sub 2} (or CO produced from CO2) in a second step to produce fuels through various well-known chemical routes involving syngas, water gas shift, and alcohol synthesis; in some applications, the generated solar H{sub 2} itself can be used as an excellent gaseous fuel, for example, in fuel cells. But at the present time, there is no solar fuels industry. Much research and development are required to create a solar fuels industry, and this Thematic Issue presents several reviews on the relevant solar fuels science and technology. The first three manuscripts relate to the daunting problem of producing

Nozik, A.; Miller, J.

2010-11-10T23:59:59.000Z

237

5, 35333559, 2005 Catalytic conversion  

E-Print Network [OSTI]

measurement technique, employing selective gas- phase catalytic conversion of methanol to formaldehyde it the second most abundant organic trace gas after methane. Methanol can play an important role in upper tropoACPD 5, 3533­3559, 2005 Catalytic conversion of methanol to formaldehyde S. J. Solomon et al. Title

Paris-Sud XI, Université de

238

A novel thermomechanical energy conversion cycle Ian M. McKinley, Felix Y. Lee, Laurent Pilon  

E-Print Network [OSTI]

A novel thermomechanical energy conversion cycle Ian M. McKinley, Felix Y. Lee, Laurent Pilon of a novel cycle converting thermal and mechanical energy directly into electrical energy. The new cycle is adaptable to changing thermal and mechanical conditions. The new cycle can generate electrical power

Pilon, Laurent

239

A System for Transforming the Emotion in Speech: Combining Data-Driven Conversion Techniques for Prosody and Voice Quality  

E-Print Network [OSTI]

variations in an utterance by using a set of perceptually optimized contextual factors. Conversion of phoneA System for Transforming the Emotion in Speech: Combining Data-Driven Conversion Techniques, while dura- tions are transformed using phone-based relative decision trees. For spectral conversion

Young, Steve

240

Novel, Integrated Reactor / Power Conversion System (LMR-AMTEC)  

SciTech Connect (OSTI)

The main features of this project were the development of a long life (up to 10 years) Liquid Metal Reactor (LMR) and a static conversion subsystem comprising an Alkali Metal Thermal-to-Electric (AMTEC) topping cycle and a ThermoElectric (TE) Bottom cycle. Various coupling options of the LMR with the energy conversion subsystem were explored and, base in the performances found in this analysis, an Indirect Coupling (IC) between the LMR and the AMTEC/TE converters with Alkali Metal Boilers (AMB) was chosen as the reference design. The performance model of the fully integrated sodium-and potassium-AMTEC/TE converters shows that a combined conversion efficiency in excess of 30% could be achieved by the plant. (B204)

Pablo Rubiolo, Principal Investigator

2003-03-21T23:59:59.000Z

Note: This page contains sample records for the topic "thermal conversion factor" 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

Optical characterization of thermal transport from the nanoscale to the macroscale  

E-Print Network [OSTI]

The thermal properties of thin films and material interfaces play an important role in many technologies such as microelectronics and solid-state energy conversion. This thesis examines the characterization of thermal ...

Schmidt, Aaron Jerome, 1979-

2008-01-01T23:59:59.000Z

242

HOOTS99 Preliminary Version Object Closure Conversion  

E-Print Network [OSTI]

classes is an exam* *ple of closure conversion. This paper argues that a direct formulation of object HOOTS99 Preliminary Version Object Closure Conversion __________________________________________________________________________ Abstract An integral part of implementing functional languages is closure conversion_the process

Glew, Neal

243

Apparatus and method for pyroelectric power conversion  

DOE Patents [OSTI]

Apparatus and method for converting heat to electrical energy by the use of one or more capacitors having temperature dependent capacitance. The capacitor is cycled between relatively high and relatively low temperatures by successive thermal contact with relatively high and relatively low temperature portions of a heat transfer medium having a temperature gradient therein. Upon heating of the capacitor, the capacitance thereof is reduced, so that a charge therein is caused to expand into associated external circuitry in which it is available to do electrical work. The capacitor is then cooled and recharged and the cycle is repeated. The electrical output of the capacitor results from the regenerative delivery of heat to and removal of heat from the capacitor by the heat transfer medium, and efficient conversion of heat to electric energy is thereby effected.

Olsen, Randall B. (Olivenhain, CA)

1984-01-01T23:59:59.000Z

244

Apparatus and method for pyroelectric power conversion  

DOE Patents [OSTI]

Apparatus and method for converting heat to electrical energy by the use of one or more capacitors having temperature dependent capacitance are disclosed. The capacitor is cycled between relatively high and relatively low temperatures by successive thermal contact with relatively high and relatively low temperature portions of a heat transfer medium having a temperature gradient therein. Upon heating of the capacitor, the capacitance thereof is reduced, so that a charge therein is caused to expand into associated external circuitry in which it is available to do electrical work. The capacitor is then cooled and recharged and the cycle is repeated. The electrical output of the capacitor results from the regenerative delivery of heat to and removal of heat from the capacitor by the heat transfer medium, and efficient conversion of heat to electric energy is thereby effected. 12 figs.

Olsen, R.B.

1984-01-10T23:59:59.000Z

245

OCEAN THERMAL ENERGY CONVERSION (OTEC) PROGRAMMATIC ENVIRONMENTAL ANALYSIS  

E-Print Network [OSTI]

sheet] map I - 732). General Electric Company. Ocean thermalby Washom et al. General Electric (1977), Francis (1977),selected is based on General Electric estimated the ammonia

Sands, M. D.

2011-01-01T23:59:59.000Z

246

OCEAN THERMAL ENERGY CONVERSION (OTEC) PROGRAMMATIC ENVIRONMENTAL ANALYSIS  

E-Print Network [OSTI]

skipjack tuna, Katsuwonnus pelamis, in an offshore area oflittle tuna), Katsuwonus pelamis (skipj ack), spp. ,

Sands, M. D.

2011-01-01T23:59:59.000Z

247

OCEAN THERMAL ENERGY CONVERSION: AN OVERALL ENVIRONMENTAL ASSESSMENT  

E-Print Network [OSTI]

Environmental Assessment OTEC Pilot Plant. Prepared forDraft Environmental Assessment Mini-OTEC Second Deployment.matic EA are within the OTEC technology and include the

Sands, M.Dale

2013-01-01T23:59:59.000Z

248

OCEAN THERMAL ENERGY CONVERSION (OTEC) PROGRAMMATIC ENVIRONMENTAL ANALYSIS  

E-Print Network [OSTI]

SCENARIO . . . . . . . . . . OTEC RESOURCE REGIONALC-1 ILLUSTRATIONS Number Title OTEC Systems Development Gulfof Mexico Moored OTEC Resource Area . . . . . . . . . . .

Sands, M. D.

2011-01-01T23:59:59.000Z

249

Recycling of wasted energy : thermal to electrical energy conversion  

E-Print Network [OSTI]

1 1.1. Low Grade Heat (LGH) isvoltage (V) as a function of the LGH temperature (T): (a) Ptresults of the output voltage as a function of the LGH

Lim, Hyuck

2011-01-01T23:59:59.000Z

250

OCEAN THERMAL ENERGY CONVERSION (OTEC) PROGRAMMATIC ENVIRONMENTAL ANALYSIS  

E-Print Network [OSTI]

industrial users. Costs and per kWh increased from to 2.7rf-30, 1978, the average cost per kWh was 6.09i for residential

Sands, M. D.

2011-01-01T23:59:59.000Z

251

Recycling of wasted energy : thermal to electrical energy conversion  

E-Print Network [OSTI]

use. REFERENCES [1] T. M. Tritt and M. A. Subramanian, MRSA. M. Rao, X. Ji, and T. M. Tritt, MRS Bulletin, Vol. 31, p.

Lim, Hyuck

2011-01-01T23:59:59.000Z

252

Recycling of wasted energy : thermal to electrical energy conversion  

E-Print Network [OSTI]

as Organic Rankine Cycle (ORC) mahines, Sterling engines,Organic Rankine Cycle (ORC) system or Sterling Engine (SE)an organic Rankine cycle (ORC) system generates electricity

Lim, Hyuck

2011-01-01T23:59:59.000Z

253

OCEAN THERMAL ENERGY CONVERSION (OTEC) PROGRAMMATIC ENVIRONMENTAL ANALYSIS  

E-Print Network [OSTI]

Occupational Safety and Health Administration (OSHA) safety, and the Coast Guard covers mar1ne covers some offshore

Sands, M. D.

2011-01-01T23:59:59.000Z

254

OCEAN THERMAL ENERGY CONVERSION (OTEC) PROGRAMMATIC ENVIRONMENTAL ANALYSIS  

SciTech Connect (OSTI)

This programmatic environmental analysis is an initial assessment of OTEC technology considering development, demonstration and commercialization; it is concluded that the OTEC development program should continue because the development, demonstration, and commercialization on a single-plant deployment basis should not present significant environmental impacts. However, several areas within the OTEC program require further investigation in order to assess the potential for environmental impacts from OTEC operation, particularly in large-scale deployments and in defining alternatives to closed-cycle biofouling control: (1) Larger-scale deployments of OTEC clusters or parks require further investigations in order to assess optimal platform siting distances necessary to minimize adverse environmental impacts. (2) The deployment and operation of the preoperational platform (OTEC-1) and future demonstration platforms must be carefully monitored to refine environmental assessment predictions, and to provide design modifications which may mitigate or reduce environmental impacts for larger-scale operations. These platforms will provide a valuable opportunity to fully evaluate the intake and discharge configurations, biofouling control methods, and both short-term and long-term environmental effects associated with platform operations. (3) Successful development of OTEC technology to use the maximal resource capabilities and to minimize environmental effects will require a concerted environmental management program, encompassing many different disciplines and environmental specialties.

Sands, M. D.

1980-01-01T23:59:59.000Z

255

The Potential Impact of Ocean Thermal Energy Conversion (OTEC)  

E-Print Network [OSTI]

The major responsibilities of the National Marine Fisheries Service (NMFS) are to monitor and assess the abundance and geographic distribution of fishery resources, to understand and predict fluctuations in the quantity and distribution of these resources, and to establish levels for their optimum use. NMFS is also charged with the development and implementation of policies for managing national fishing grounds, development and enforcemeJlt of domestic fisheries regulations, surveillance of foreign fishing off United States coastal waters, and the development and enforcement of international fishery agreements and policies. NMFS also assists the fishing industry through marketing service and economic analysis programs, and mortgage insurance and vessel cunstruction subsidies. It collects, analyzes, and publishes statistics on various phases of the industry.

On Fisheries; Edward P. Myers; Donald E. Hoss; Walter M. Matsumoto; David S. Peters; Michael P. Seki; Richard N. Uchida; John D. Ditmars; Robert A. Paddock

1986-01-01T23:59:59.000Z

256

Recycling of wasted energy : thermal to electrical energy conversion  

E-Print Network [OSTI]

total energy received by todays solar panels and is beings best solar panels can convert only ~16% of solar energy to

Lim, Hyuck

2011-01-01T23:59:59.000Z

257

Recycling of wasted energy : thermal to electrical energy conversion  

E-Print Network [OSTI]

various types of Stirling engine have been developed, whichThermogalvanic cell Stirling Engine ORC Internal Combustionof Sterling engine [17] year inventor Robert Stirling John

Lim, Hyuck

2011-01-01T23:59:59.000Z

258

Thermal-to-electric energy conversion using ferroelectric film capacitors  

SciTech Connect (OSTI)

The capacitive ferroelectric thermoelectric converter harvesting electrical energy through non-linear capacitance variation caused by changes in temperature is analyzed. The ferroelectric material used was the thin (0.5??m) Ba{sub 0.3}Sr{sub 0.7}TiO{sub 3} film. On the basis of experimental dependencies of the ferroelectric film permittivity on temperature ranging from 100?K to 350?K under different electric fields up to 80?V/?m, the optimum values of operating temperatures and electric field for the energy harvesting optimization were determined. For the temperature oscillations of 15?K around room temperature and electric field about 40?V/?m, the harvested energy was estimated as 30 mJ/cm{sup 3}. It is shown that the use of thin ferroelectric films for rapid capacitance variation versus temperature and microelectromechanical systems for fast temperature modulations may be a relevant solution for creation of small power scale generators for portable electronics.

Kozyrev, A. B.; Platonov, R. A.; Soldatenkov, O. I. [Saint-Petersburg State Electrotechnical University, 5 Professor Popov Street, St-Petersburg 197376 (Russian Federation)

2014-10-28T23:59:59.000Z

259

OCEAN THERMAL ENERGY CONVERSION (OTEC) PROGRAMMATIC ENVIRONMENTAL ANALYSIS  

E-Print Network [OSTI]

aspects of siting OTEC plants offshore the United States ongas. phosgene Offshore ammonia plant-ships will presentan facility offshore may expose the plant to power outages

Sands, M. D.

2011-01-01T23:59:59.000Z

260

OCEAN THERMAL ENERGY CONVERSION (OTEC) PROGRAMMATIC ENVIRONMENTAL ANALYSIS  

E-Print Network [OSTI]

Electricity - Hawaii is almost totally dependent upon imported petroleum A natural energy source of geothermal

Sands, M. D.

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermal conversion factor" 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

OCEAN THERMAL ENERGY CONVERSION (OTEC) PROGRAMMATIC ENVIRONMENTAL ANALYSIS  

E-Print Network [OSTI]

by liquifaction and fractional distillation of air (EPA, Thefractional elements nitrogen pure form. Nitrogen \\'lill be extracted from the atmosphere by means of liquefaction and distillation,

Sands, M. D.

2011-01-01T23:59:59.000Z

262

Welcome - Center for Solar and Thermal Energy Conversion  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation InInformation InExplosion Monitoring:Home|Physics ResearchLCLS Sign Register todayUserSee

263

Advisory Board - Center for Solar and Thermal Energy Conversion  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation InInformationCenterResearch Highlights MediaFuelAbout Us >PortalWaterAdvice

264

Papers Published - Center for Solar and Thermal Energy Conversion  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation Desert Southwest RegionatSearch Welcome to the Pacific Northwest Nationalto controlPPPL

265

Research Program - Center for Solar and Thermal Energy Conversion  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation Desert Southwest RegionatSearch Welcome toResearch Areas OurLANL ResearchCross-Cutting

266

Research Program - Center for Solar and Thermal Energy Conversion  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation Desert Southwest RegionatSearch Welcome toResearch Areas OurLANL ResearchCross-CuttingIn the

267

Research Program - Center for Solar and Thermal Energy Conversion  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation Desert Southwest RegionatSearch Welcome toResearch Areas OurLANL ResearchCross-CuttingIn theWe

268

Research Program - Center for Solar and Thermal Energy Conversion  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation Desert Southwest RegionatSearch Welcome toResearch Areas OurLANL ResearchCross-CuttingIn

269

Science Highlights- Center for Solar and Thermal Energy Conversion  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation Desert Southwest RegionatSearchScheduled System OutagesNews Press ReleasesScience

270

Ocean Thermal Energy Conversion Basics | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Year in3.pdfEnergyDepartment of Energy(National1 -OSSGasof Energy Ocean EnergyRenewable

271

NREL-Ocean Energy Thermal Conversion | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: Energy Resources Jump to:46 -Energieprojekte3Informationof Energy Calculator Jump to: navigation,

272

Evaluation of Thermal to Electrical Energy Conversion of High Temperature  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeat PumpRecord ofESPCof EnergyHouse11 DOE Hydrogen and Fuel|Skutterudite-Based

273

Investigators - Center for Solar and Thermal Energy Conversion  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation Desert Southwest Region service area.PortaldefaultIntroducing Aurora

274

Management Council - Center for Solar and Thermal Energy Conversion  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation Desert Southwest Region serviceMissionreal-time information

275

News - Center for Solar and Thermal Energy Conversion  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation Desert Southwest Regionat Cornell Batteries

276

News - Center for Solar and Thermal Energy Conversion  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation Desert Southwest Regionat Cornell BatteriesArchives Events/News Archives 1st Annual CSTEC

277

Contact - Center for Solar and Thermal Energy Conversion  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation InInformationCenterResearchCASLNanoporousTestimony |IdahoVision Predict,Researchhome

278

Directors - Center for Solar and Thermal Energy Conversion  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation Desert Southwest Region service area. The DesertDirections The LaboratoryAssociate Directors

279

Directors - Center for Solar and Thermal Energy Conversion  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation Desert Southwest Region service area. The DesertDirections The LaboratoryAssociate

280

Facilities - Center for Solar and Thermal Energy Conversion  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation Desert Southwest Region service area. TheEPSCI Home It isGasERP SubmitScienceas

Note: This page contains sample records for the topic "thermal conversion factor" 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

Science Highlights- Center for Solar and Thermal Energy Conversion  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassiveSubmitted forHighlights Nuclear Physics (NP) NP Home About Research Facilities0

282

Science Highlights- Center for Solar and Thermal Energy Conversion  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassiveSubmitted forHighlights Nuclear Physics (NP) NP Home About Research

283

Science Highlights- Center for Solar and Thermal Energy Conversion  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassiveSubmitted forHighlights Nuclear Physics (NP) NP Home About Research2 -

284

Science Highlights- Center for Solar and Thermal Energy Conversion  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLas ConchasPassiveSubmitted forHighlights Nuclear Physics (NP) NP Home About Research2 -3 -

285

Open cycle ocean thermal energy conversion system structure  

DOE Patents [OSTI]

A generally mushroom-shaped, open cycle OTEC system and distilled water producer which has a skirt-conduit structure extending from the enlarged portion of the mushroom to the ocean. The enlarged part of the mushroom houses a toroidal casing flash evaporator which produces steam which expands through a vertical rotor turbine, partially situated in the center of the blossom portion and partially situated in the mushroom's stem portion. Upon expansion through the turbine, the motive steam enters a shell and tube condenser annularly disposed about the rotor axis and axially situated beneath the turbine in the stem portion. Relatively warm ocean water is circulated up through the radially outer skirt-conduit structure entering the evaporator through a radially outer portion thereof, flashing a portion thereof into motive steam, and draining the unflashed portion from the evaporator through a radially inner skirt-conduit structure. Relatively cold cooling water enters the annular condenser through the radially inner edge and travels radially outwardly into a channel situated along the radially outer edge of the condenser. The channel is also included in the radially inner skirt-conduit structure. The cooling water is segregated from the potable, motive steam condensate which can be used for human consumption or other processes requiring high purity water. The expansion energy of the motive steam is partially converted into rotational mechanical energy of the turbine rotor when the steam is expanded through the shaft attached blades. Such mechanical energy drives a generator also included in the enlarged mushroom portion for producing electrical energy. Such power generation equipment arrangement provides a compact power system from which additional benefits may be obtained by fabricating the enclosing equipment, housings and component casings from low density materials, such as prestressed concrete, to permit those casings and housings to also function as a floating support vessel.

Wittig, J. Michael (West Goshen, PA)

1980-01-01T23:59:59.000Z

286

Plasmonic conversion of solar energy  

E-Print Network [OSTI]

Basic Research Needs for Solar Energy Utilization, BasicS. Pillai and M. A. Green, Solar Energy Materials and SolarPlasmonic conversion of solar energy Csar Clavero Plasma

Clavero, Cesar

2014-01-01T23:59:59.000Z

287

Nanostructured High Temperature Bulk Thermoelectric Energy Conversion...  

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

High Temperature Bulk Thermoelectric Energy Conversion for Efficient Waste Heat Recovery Nanostructured High Temperature Bulk Thermoelectric Energy Conversion for Efficient Waste...

288

Thermochemical Conversion | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: AlternativeEnvironment,Institutes and1Telework Telework The|Conversion Thermochemical Conversion

289

Thermal Comfort under Transient Metabolic and Dynamic Localized Airflow Conditions Combined with Neutral and Warm Ambient Temperatures  

E-Print Network [OSTI]

Human thermal environments constitute complex combinations of various interacting thermal factors. The transient and non-uniform nature of those thermal factors further increases the complexity of the thermal comfort problem. The conventional...

Ugursal, Ahmet

2012-02-14T23:59:59.000Z

290

Biochemical Conversion Pilot Plant (Fact Sheet)  

SciTech Connect (OSTI)

This fact sheet provides information about Biochemical Conversion Pilot Plant capabilities and resources at NREL.

Not Available

2012-06-01T23:59:59.000Z

291

HOOTS99 Preliminary Version Object Closure Conversion  

E-Print Network [OSTI]

is an example of closure conversion. This paper argues that a direct formulation of object closure conversionHOOTS99 Preliminary Version Object Closure Conversion Neal Glew 1 Department of Computer Science conversion--the process of converting code with free variables into closed code and auxiliary data structures

Glew, Neal

292

Renewable Energies III Photovoltaics, Solar & Geo-Thermal  

E-Print Network [OSTI]

Renewable Energies III Photovoltaics, Solar & Geo-Thermal 21st August - 2nd September 2011 on the principles of solar energy conversion. Theoretical knowledge will be complemented with practical workshops of solar energy conversion. Theoretical knowledge will be comple- mented with practical workshops

293

Thermophotovoltaic conversion using selective infrared line emitters and large band gap photovoltaic devices  

DOE Patents [OSTI]

Efficient thermophotovoltaic conversion can be performed using photovoltaic devices with a band gap in the 0.75-1.4 electron volt range, and selective infrared emitters chosen from among the rare earth oxides which are thermally stimulated to emit infrared radiation whose energy very largely corresponds to the aforementioned band gap. It is possible to use thermovoltaic devices operating at relatively high temperatures, up to about 300.degree. C., without seriously impairing the efficiency of energy conversion.

Brandhorst, Jr., Henry W. (Auburn, AL); Chen, Zheng (Auburn, AL)

2000-01-01T23:59:59.000Z

294

HELIOPHYSICS II. ENERGY CONVERSION PROCESSES  

E-Print Network [OSTI]

of a solar flare 11 2.3.1 Flare luminosity and mechanical energy 11 2.3.2 The impulsive phase (hard X with the term "solar flare" dominate our thinking about energy conversion from magnetic storage to other forms approaches to the problems involved in phys- ically characterizing the solar atmosphere; see also the lecture

Hudson, Hugh

295

Energy Storage, Conversion and Utilization  

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

Energy Storage, Conversion and Utilization A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Al-Ghadhban, Samir - Electrical Engineering Department, King Fahd University of...

296

Energy Conversion and Storage Program  

SciTech Connect (OSTI)

The Energy Conversion and Storage Program applies chemistry and materials science principles to solve problems in (1) production of new synthetic fuels, (2) development of high-performance rechargeable batteries and fuel cells, (3) development of advanced thermochemical processes for energy conversion, (4) characterization of complex chemical processes, and (5) application of novel materials for energy conversion and transmission. Projects focus on transport-process principles, chemical kinetics, thermodynamics, separation processes, organic and physical chemistry, novel materials, and advanced methods of analysis. Electrochemistry research aims to develop advanced power systems for electric vehicle and stationary energy storage applications. Topics include identification of new electrochemical couples for advanced rechargeable batteries, improvements in battery and fuel-cell materials, and the establishment of engineering principles applicable to electrochemical energy storage and conversion. Chemical Applications research includes topics such as separations, catalysis, fuels, and chemical analyses. Included in this program area are projects to develop improved, energy-efficient methods for processing waste streams from synfuel plants and coal gasifiers. Other research projects seek to identify and characterize the constituents of liquid fuel-system streams and to devise energy-efficient means for their separation. Materials Applications research includes the evaluation of the properties of advanced materials, as well as the development of novel preparation techniques. For example, the use of advanced techniques, such as sputtering and laser ablation, are being used to produce high-temperature superconducting films.

Cairns, E.J.

1992-03-01T23:59:59.000Z

297

MUTUAL CONVERSION SOLAR AND SIDEREAL  

E-Print Network [OSTI]

TABLES FOR THE MUTUAL CONVERSION OF SOLAR AND SIDEREAL TIME BY EDWARD SANG, F.R.S.E. EDINBURGH in the third example. Sang converts 3.27 seconds of solar time into 3.26 seconds of sidereal time. But sidereal time elapses faster than solar time, and the correct value is 3.28 sec- onds. In the fourth example

Roegel, Denis

298

Nanostructured High Temperature Bulk Thermoelectric Energy Conversion...  

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

Electricity & Solar Thermal HW Module Electricity Solar thermal space heating Baseline Solar Thermal Inverte r To Grid 2012 GMZ Energy, Proprietary and Confidential Bosch -...

299

Implications of Fast Reactor Transuranic Conversion Ratio  

SciTech Connect (OSTI)

Theoretically, the transuranic conversion ratio (CR), i.e. the transuranic production divided by transuranic destruction, in a fast reactor can range from near zero to about 1.9, which is the average neutron yield from Pu239 minus 1. In practice, the possible range will be somewhat less. We have studied the implications of transuranic conversion ratio of 0.0 to 1.7 using the fresh and discharge fuel compositions calculated elsewhere. The corresponding fissile breeding ratio ranges from 0.2 to 1.6. The cases below CR=1 (burners) do not have blankets; the cases above CR=1 (breeders) have breeding blankets. The burnup was allowed to float while holding the maximum fluence to the cladding constant. We graph the fuel burnup and composition change. As a function of transuranic conversion ratio, we calculate and graph the heat, gamma, and neutron emission of fresh fuel; whether the material is attractive for direct weapon use using published criteria; the uranium utilization and rate of consumption of natural uranium; and the long-term radiotoxicity after fuel discharge. For context, other cases and analyses are included, primarily once-through light water reactor (LWR) uranium oxide fuel at 51 MWth-day/kg-iHM burnup (UOX-51). For CR<1, the heat, gamma, and neutron emission increase as material is recycled. The uranium utilization is at or below 1%, just as it is in thermal reactors as both types of reactors require continuing fissile support. For CR>1, heat, gamma, and neutron emission decrease with recycling. The uranium utilization exceeds 1%, especially as all the transuranic elements are recycled. exceeds 1%, especially as all the transuranic elements are recycled. At the system equilibrium, heat and gamma vary by somewhat over an order of magnitude as a function of CR. Isotopes that dominate heat and gamma emission are scattered throughout the actinide chain, so the modest impact of CR is unsurprising. Neutron emitters are preferentially found among the higher actinides, so the neutron emission varies much stronger with CR, about three orders of magnitude.

Steven J. Piet; Edward A. Hoffman; Samuel E. Bays

2010-11-01T23:59:59.000Z

300

ihLSEVIFR Optical Materials 3 (1994) 115--121 Absolute non-radiative energy conversion efficiency scanning  

E-Print Network [OSTI]

, in optical materials. 1. Introduction reported optical absorptions and optical-to-thermal energy conversion of transparent, high-qual- which PPES 11NR studies have been reported have itylaser materials, ~NR (A) the absence of irre- radiativecenters during the quadrature scan, as corn- producible thermal resistances

Mandelis, Andreas

Note: This page contains sample records for the topic "thermal conversion factor" 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

Jet conversions in a quark-gluon plasma  

E-Print Network [OSTI]

Quark and gluon jets traversing through a quark-gluon plasma not only lose their energies but also can undergo flavor conversions. The conversion rates via the elastic $q(\\bar q)g\\to gq(\\bar q)$ and the inelastic $q\\bar q\\leftrightarrow gg$ scatterings are evaluated in the lowest order in QCD. Including both jet energy loss and conversions in the expanding quark-gluon plasma produced in relativistic heavy ion collisions, we have found a net conversion of quark to gluon jets. This reduces the difference between the nuclear modification factors for quark and gluon jets in central heavy ion collisions and thus enhances the $p/\\pi^+$ and ${\\bar p}/\\pi^-$ ratios at high transverse momentum. However, a much larger net quark to gluon jet conversion rate than the one given by the lowest-order QCD is needed to account for the observed similar ratios in central Au+Au and p+p collisions at same energy. Implications of our results are discussed.

W. Liu; C. M. Ko; B. W. Zhang

2007-05-05T23:59:59.000Z

302

UPDATE AND ENHANCEMENT OF ODOT'S CRASH REDUCTION FACTORS  

E-Print Network [OSTI]

A Printed on recycled paper #12;ii SI* (MODERN METRIC) CONVERSION FACTORS APPROXIMATE CONVERSIONS TO SIUPDATE AND ENHANCEMENT OF ODOT'S CRASH REDUCTION FACTORS Final Report SPR 612 by Christopher M and Enhancement of ODOT's Crash Reduction Factors 6. Performing Organization Code 7. Author(s) Christopher M

Bertini, Robert L.

303

Thermal tolerant avicelase from Acidothermus cellulolyticus  

DOE Patents [OSTI]

The invention provides a thermal tolerant (thermostable) cellulase, AviIII, that is a member of the glycoside hydrolase (GH) family. AviIII was isolated and characterized from Acidothermus cellulolyticus and, like many cellulases, the disclosed polypeptide and/or its derivatives may be useful for the conversion of biomass into biofuels and chemicals.

Ding, Shi-You (Golden, CO); Adney, William S. (Golden, CO); Vinzant, Todd B. (Golden, CO); Himmel, Michael E. (Littleton, CO)

2008-04-29T23:59:59.000Z

304

A converse to Dye's theorem Greg Hjorthy  

E-Print Network [OSTI]

* A converse to Dye We show a converse to a consequence of the final strengthening of Dye's th* *eorem proved, measure preserving, and ergodic. Theorem 1.1(Dye; see [5], [6].) Any two ergodic, standard, measure

Hjorth, Greg

305

Grounded Situation Models for Situated Conversational Assistants  

E-Print Network [OSTI]

A Situated Conversational Assistant (SCA) is a system with sensing, acting and speech synthesis/recognition abilities, which engages in physically situated natural language conversation with human partners and assists them ...

Mavridis, Nikolaos

2007-01-01T23:59:59.000Z

306

Petar Ljusev SIngle Conversion stage AMplifier  

E-Print Network [OSTI]

. The proposed SICAM solution strives for direct energy conversion from the mains to the audio outputPetar Ljusev SIngle Conversion stage AMplifier - SICAM PhD thesis, December 2005 #12;#12;To Elena of the project "SICAM - SIngle Conversion stage AMplifier", funded by the Danish Energy Authority under the EFP

307

Data Conversion in Residue Number System  

E-Print Network [OSTI]

for direct conversion when interaction with the real analog world is required. We first develop two efficient schemes for direct analog-to-residue conversion. Another efficient scheme for direct residue analogique réel est nécessaire. Nous dévelopons deux systèmes efficaces pour la conversion directe du domaine

Zilic, Zeljko

308

HOOTS99 Preliminary Version Object Closure Conversion  

E-Print Network [OSTI]

classes is an example of closure conversion. This paper argues that a direct formulation of object closureHOOTS99 Preliminary Version Object Closure Conversion Neal Glew 1 Department of Computer Science conversion---the process of converting code with free variables into closed code and auxiliary data

Glew, Neal

309

Proceedings of the Twenty-First Water Reactor Safety Information Meeting: Volume 1, Plenary session; Advanced reactor research; advanced control system technology; advanced instrumentation and control hardware; human factors research; probabilistic risk assessment topics; thermal hydraulics; thermal hydraulic research for advanced passive LWRs  

SciTech Connect (OSTI)

This three-volume report contains 90 papers out of the 102 that were presented at the Twenty-First Water Reactor Safety Information Meeting held at the Bethesda Marriott Hotel, Bethesda, Maryland, during the week of October 25--27, 1993. The papers are printed in the order of their presentation in each session and describe progress and results of programs in nuclear safety research conducted in this country and abroad. Foreign participation in the meeting included papers presented by researchers from France, Germany, Japan, Russia, Switzerland, Taiwan, and United Kingdom. The titles of the papers and the names of the authors have been updated and may differ from those that appeared in the final program of the meeting. Individual papers have been cataloged separately. This document, Volume 1 covers the following topics: Advanced Reactor Research; Advanced Instrumentation and Control Hardware; Advanced Control System Technology; Human Factors Research; Probabilistic Risk Assessment Topics; Thermal Hydraulics; and Thermal Hydraulic Research for Advanced Passive Light Water Reactors.

Monteleone, S. [Brookhaven National Lab., Upton, NY (United States)] [comp.

1994-04-01T23:59:59.000Z

310

Next-Generation Thermionic Solar Energy Conversion | Department...  

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

Next-Generation Thermionic Solar Energy Conversion Next-Generation Thermionic Solar Energy Conversion This fact sheet describes a next-generation thermionic solar energy conversion...

311

High resolution A/D conversion based on piecewise conversion at lower resolution  

DOE Patents [OSTI]

Piecewise conversion of an analog input signal is performed utilizing a plurality of relatively lower bit resolution A/D conversions. The results of this piecewise conversion are interpreted to achieve a relatively higher bit resolution A/D conversion without sampling frequency penalty.

Terwilliger, Steve (Albuquerque, NM)

2012-06-05T23:59:59.000Z

312

Biomass thermochemical conversion program: 1987 annual report  

SciTech Connect (OSTI)

The objective of the Biomass Thermochemical Conversion Program is to generate a base of scientific data and conversion process information that will lead to establishment of cost-effective processes for conversion of biomass resources into clean fuels. To accomplish this objective, in fiscal year 1987 the Thermochemical Conversion Program sponsored research activities in the following four areas: Liquid Hydrocarbon Fuels Technology; Gasification Technology; Direct Combustion Technology; Program Support Activities. In this report an overview of the Thermochemical Conversion Program is presented. Specific research projects are then described. Major accomplishments for 1987 are summarized.

Schiefelbein, G.F.; Stevens, D.J.; Gerber, M.A.

1988-01-01T23:59:59.000Z

313

Biomass thermochemical conversion program. 1985 annual report  

SciTech Connect (OSTI)

Wood and crop residues constitute a vast majority of the biomass feedstocks available for conversion, and thermochemical processes are well suited for conversion of these materials. The US Department of Energy (DOE) is sponsoring research on this conversion technology for renewable energy through its Biomass Thermochemical Conversion Program. The Program is part of DOE's Biofuels and Municipal Waste Technology Division, Office of Renewable Technologies. This report briefly describes the Thermochemical Conversion Program structure and summarizes the activities and major accomplishments during fiscal year 1985. 32 figs., 4 tabs.

Schiefelbein, G.F.; Stevens, D.J.; Gerber, M.A.

1986-01-01T23:59:59.000Z

314

Direct conversion of carboxylate salts to carboxylic acids via reactive extraction  

E-Print Network [OSTI]

the fermentation conversion. In this case, fermentation broth contains ammonium salts (e.g., ammonium acetate, propionate, butyrate, pentanoate). Therefore, the downstream processing steps (including extraction, purification, esterification, and product... separation) must be compatible with the ammonium carboxylate salts formed in the fermentation. This research focuses on converting fermentation broth carboxylate salts into their corresponding acids via acid springing. Reactive extraction and thermal...

Xu, Xin

2008-10-10T23:59:59.000Z

315

Using silver nanowire antennas to enhance the conversion efficiency of photoresponsive  

E-Print Network [OSTI]

and solar energy harvesting. energy conversion localized surface plasmon photo-driven nanomotor Plants harvest solar energy by photosynthesis, in which photo- sensitive biomolecules absorb energy from sunlight and con- vert it into chemical energy. Human beings utilize solar energy by fossil fuels, solar thermal

Tan, Weihong

316

A new cascade-type heat conversion system  

SciTech Connect (OSTI)

Various heat conversion systems have different operating temperatures. This paper shows how, in a solar energy system some of the waste heat from a thermophotovoltaic arrangement can be made to operate a thermionic power generator. The waste heat of the thermionic power generator can then be made to operate an alkali-metal thermal electric converter, and the waste heat from the alkali-metal thermal electric converter as well as the rest of the waste heat of the thermophotovoltaic system can be made to operate a methane reformation system. Stored heat from the methane reformation system can be made to operate the system at night. The overall system efficiency of the example shown is 42.6%. As a prime source of heat a nuclear pile or burning hydrogen may be used.

Newman, E. [Twenty-First Century Power Co., Northridge, CA (United States)

1996-12-31T23:59:59.000Z

317

Conversion of raw carbonaceous fuels  

DOE Patents [OSTI]

Three configurations for an electrochemical cell are utilized to generate electric power from the reaction of oxygen or air with porous plates or particulates of carbon, arranged such that waste heat from the electrochemical cells is allowed to flow upwards through a storage chamber or port containing raw carbonaceous fuel. These configurations allow combining the separate processes of devolatilization, pyrolysis and electrochemical conversion of carbon to electric power into a single unit process, fed with raw fuel and exhausting high BTU gases, electric power, and substantially pure CO.sub.2 during operation.

Cooper, John F. (Oakland, CA)

2007-08-07T23:59:59.000Z

318

Conversion | National Nuclear Security Administration  

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

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

319

Biochemical Conversion | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsBSCmemo.pdf BSCmemo.pdf BSCmemo.pdfBetter BuildingsBetter Plants»NewsConversion

320

Thermal reactor safety  

SciTech Connect (OSTI)

Information is presented concerning new trends in licensing; seismic considerations and system structural behavior; TMI-2 risk assessment and thermal hydraulics; statistical assessment of potential accidents and verification of computational methods; issues with respect to improved safety; human factors in nuclear power plant operation; diagnostics and activities in support of recovery; LOCA transient analysis; unresolved safety issues and other safety considerations; and fission product transport.

Not Available

1980-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermal conversion factor" 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 Review of Previous Research in Direct Energy Conversion Fission Reactors  

SciTech Connect (OSTI)

From the earliest days of power reactor development, direct energy conversion was an obvious choice to produce high efficiency electric power generation. Directly capturing the energy of the fission fragments produced during nuclear fission avoids the intermediate conversion to thermal energy and the efficiency limitations of classical thermodynamics. Efficiencies of more than 80% are possible, independent of operational temperature. Direct energy conversion fission reactors would possess a number of unique characteristics that would make them very attractive for commercial power generation. These reactors would be modular in design with integral power conversion and operate at low pressures and temperatures. They would operate at high efficiency and produce power well suited for long distance transmission. They would feature large safety margins and passively safe design. Ideally suited to production by advanced manufacturing techniques, direct energy conversion fission reactors could be produced more economically than conventional reactor designs. The history of direct energy conversion can be considered as dating back to 1913 when Moseleyl demonstrated that charged particle emission could be used to buildup a voltage. Soon after the successful operation of a nuclear reactor, E.P. Wigner suggested the use of fission fragments for direct energy conversion. Over a decade after Wigner's suggestion, the first theoretical treatment of the conversion of fission fragment kinetic energy into electrical potential appeared in the literature. Over the ten years that followed, a number of researchers investigated various aspects of fission fragment direct energy conversion. Experiments were performed that validated the basic physics of the concept, but a variety of technical challenges limited the efficiencies that were achieved. Most research in direct energy conversion ceased in the US by the late 1960s. Sporadic interest in the concept appears in the literature until this day, but there have been no recent significant programs to develop the technology.

DUONG,HENRY; POLANSKY,GARY F.; SANDERS,THOMAS L.; SIEGEL,MALCOLM D.

1999-09-22T23:59:59.000Z

322

Waste Gasification by Thermal Plasma: A Review Frdric Fabry*, Christophe Rehmet, Vandad Rohani, Laurent Fulcheri  

E-Print Network [OSTI]

12 Waste Gasification by Thermal Plasma: A Review Frédéric Fabry*, Christophe Rehmet, Vandad Rohani proposes an overview of waste-to-energy conversion by gasification processes based on thermal plasma, of various waste gasification processes based on thermal plasma (DC or AC plasma torches) at lab scale versus

Paris-Sud XI, Université de

323

Photopyroelectric deconvolution of bulk and surface optical-absorption and nonradiative energy conversion efficiency spectra in Ti:A1203 crystals  

E-Print Network [OSTI]

- mental scheme to obtain high-resolution spectra of the optical-to-thermal energy conversion efficiency for quantitatively. When dealing with relatively highly absorbing condensed phases, bulk absorptions usually dominate conversion efficiency spectra in Ti:A1203 crystals J. Vanniasinkam, A. Mandelis, and S. Buddhudu Photothermal

Mandelis, Andreas

324

Thermal performance of the Brookhaven natural thermal storage house  

SciTech Connect (OSTI)

In the Brookhaven natural thermal storage house, an energy-efficient envelope, passive solar collectors, and a variety of energy conservation methods are incorporated. The thermal characteristics of the house during the tested heating season are evaluated. Temperature distributions at different zones are displayed, and the effects of extending heating supply ducts only to the main floor and heating return ducts only from the second floor are discussed. The thermal retrievals from the structure and the passive collectors are assessed, and the total conservation and passive solar contributions are outlined. Several correlation factors relating these thermal behaviors are introduced, and their diurnal variations are displayed. Finally, the annual energy requirements, and the average load factors are analyzed and discussed.

Ghaffari, H.T.; Jones, R.F.

1981-01-01T23:59:59.000Z

325

2011 Biomass Program Platform Peer Review: Thermochemical Conversion...  

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

Thermochemical Conversion 2011 Biomass Program Platform Peer Review: Thermochemical Conversion "This document summarizes the recommendations and evaluations provided by an...

326

Nanoscale thermal transport. II. 20032012  

SciTech Connect (OSTI)

A diverse spectrum of technology drivers such as improved thermal barriers, higher efficiency thermoelectric energy conversion, phase-change memory, heat-assisted magnetic recording, thermal management of nanoscale electronics, and nanoparticles for thermal medical therapies are motivating studies of the applied physics of thermal transport at the nanoscale. This review emphasizes developments in experiment, theory, and computation in the past ten years and summarizes the present status of the field. Interfaces become increasingly important on small length scales. Research during the past decade has extended studies of interfaces between simple metals and inorganic crystals to interfaces with molecular materials and liquids with systematic control of interface chemistry and physics. At separations on the order of ?1?nm, the science of radiative transport through nanoscale gaps overlaps with thermal conduction by the coupling of electronic and vibrational excitations across weakly bonded or rough interfaces between materials. Major advances in the physics of phonons include first principles calculation of the phonon lifetimes of simple crystals and application of the predicted scattering rates in parameter-free calculations of the thermal conductivity. Progress in the control of thermal transport at the nanoscale is critical to continued advances in the density of information that can be stored in phase change memory devices and new generations of magnetic storage that will use highly localized heat sources to reduce the coercivity of magnetic media. Ultralow thermal conductivitythermal conductivity below the conventionally predicted minimum thermal conductivityhas been observed in nanolaminates and disordered crystals with strong anisotropy. Advances in metrology by time-domain thermoreflectance have made measurements of the thermal conductivity of a thin layer with micron-scale spatial resolution relatively routine. Scanning thermal microscopy and thermal analysis using proximal probes has achieved spatial resolution of 10?nm, temperature precision of 50 mK, sensitivity to heat flows of 10 pW, and the capability for thermal analysis of sub-femtogram samples.

Cahill, David G., E-mail: d-cahill@illinois.edu; Braun, Paul V. [Department of Materials Science and Engineering and the Frederick Seitz Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801 (United States); Chen, Gang [Department of Mechanical Engineering, MIT, Cambridge, Massachusetts 02139 (United States); Clarke, David R. [School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138 (United States); Fan, Shanhui [Department of Electrical Engineering, Stanford University, Stanford, California 94305 (United States); Goodson, Kenneth E. [Department of Mechanical Engineering, Stanford University, Stanford, California 94305 (United States); Keblinski, Pawel [Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180 (United States); King, William P. [Department of Mechanical Sciences and Engineering, University of Illinois, Urbana, Illinois 61801 (United States); Mahan, Gerald D. [Department of Physics, Penn State University, University Park, Pennsylvania 16802 (United States); Majumdar, Arun [Department of Mechanical Engineering, University of California, Berkeley, California 94720 (United States); Maris, Humphrey J. [Department of Physics, Brown University, Providence, Rhode Island 02912 (United States); Phillpot, Simon R. [Department of Materials Science and Engineering, University of Florida, Gainseville, Florida 32611 (United States); Pop, Eric [Department of Electrical and Computer Engineering, University of Illinois, Urbana, Illinois 61801 (United States); Shi, Li [Department of Mechanical Engineering, University of Texas, Autin, Texas 78712 (United States)

2014-03-15T23:59:59.000Z

327

Dose factor entry and display tool for BNCT radiotherapy  

DOE Patents [OSTI]

A system for use in Boron Neutron Capture Therapy (BNCT) radiotherapy planning where a biological distribution is calculated using a combination of conversion factors and a previously calculated physical distribution. Conversion factors are presented in a graphical spreadsheet so that a planner can easily view and modify the conversion factors. For radiotherapy in multi-component modalities, such as Fast-Neutron and BNCT, it is necessary to combine each conversion factor component to form an effective dose which is used in radiotherapy planning and evaluation. The Dose Factor Entry and Display System is designed to facilitate planner entry of appropriate conversion factors in a straightforward manner for each component. The effective isodose is then immediately computed and displayed over the appropriate background (e.g. digitized image).

Wessol, Daniel E. (Bozeman, MT); Wheeler, Floyd J. (Idaho Falls, ID); Cook, Jeremy L. (Greeley, CO)

1999-01-01T23:59:59.000Z

328

Development of a solar receiver for a high-efficiency thermionic/thermoelectric conversion system  

SciTech Connect (OSTI)

Solar energy is one of the most promising energy resources on Earth and in space, because it is clean and inexhaustible. Therefore, we have been developing a solar-powered high-efficiency thermionic-thermoelectric conversion system which combines a thermionic converter (TIC) with a thermoelectric converter (TEC) to use thermal energy efficiently and to achieve high efficiency conversion. The TIC emitter must uniformly heat up to 1800 K. The TIC emitter can be heated using thermal radiation from a solar receiver maintained at a high temperature by concentrated solar irradiation. A cylindrical cavity-type solar receiver constructed from graphite was designed and heated in a vacuum by using the solar concentrator at Tohoku University. The maximum temperature of the solar receiver enclosed by a molybdenum cup reached 1965 K, which was sufficiently high to heat a TIC emitter using thermal radiation from the receiver. 4 refs., 6 figs., 1 tab.

Naito, H.; Kohsaka, Y.; Cooke, D.; Arashi, H. [Tohoku Univ., Aramaki (Japan)] [Tohoku Univ., Aramaki (Japan)

1996-10-01T23:59:59.000Z

329

Measurement of thermal conductivity P t BPart B  

E-Print Network [OSTI]

wave Take the Fourier transform of this frequency domain solution #12;For a low thermal conductivity thin filmFor a low thermal conductivity thin film on a high thermal conductivity substrate (Factor of 2Measurement of thermal conductivity Part A: P t BPart B: · Time domain thermoreflectance #12

Braun, Paul

330

Conversion feasibility studies for the Grenoble high flux reactor  

SciTech Connect (OSTI)

Feasibility studies for conversion of the High Flux Reactor (RHF) at Grenoble France have been performed at the Argonne National Laboratory in cooperation with the Institut Laue-Langevin (ILL). The uranium densities required for conversion of the RHF to reduced enrichment fuels were computed to be 7.9 g/cm{sup 3} with 20% enrichment, 4.8 g/cm{sup 3} with 29% enrichment, and 2.8 g/cm{sup 3} with 45% enrichment. Thermal flux reductions at the peak in the heavy water reflector were computed to be 3% with 45% enriched fuel and 7% with 20% enriched fuel. In each case, the reactor's 44 day cycle length was preserved and no changes were made in the fuel element geometry. If the cladding thickness could be reduced from 0.38 mm to 0.30 mm, the required uranium density with 20% enrichment would be about 6.0 g/cm{sup 3} and the thermal flux reduction at the peak in the heavy water reflector would be about 7%. Significantly higher uranium densities are required in the RHF than in heavy water reactors with more conventional designs because the neutron spectrum is much harder in the RHF. Reduced enrichment fuels with the uranium densities required for use in the RHF are either not available or are not licensable at the present time. 6 refs., 6 figs., 3 tabs.

Mo, S.C.; Matos, J.E.

1989-01-01T23:59:59.000Z

331

Microturbine Power Conversion Technology Review  

SciTech Connect (OSTI)

In this study, the Oak Ridge National Laboratory (ORNL) is performing a technology review to assess the market for commercially available power electronic converters that can be used to connect microturbines to either the electric grid or local loads. The intent of the review is to facilitate an assessment of the present status of marketed power conversion technology to determine how versatile the designs are for potentially providing different services to the grid based on changes in market direction, new industry standards, and the critical needs of the local service provider. The project includes data gathering efforts and documentation of the state-of-the-art design approaches that are being used by microturbine manufacturers in their power conversion electronics development and refinement. This project task entails a review of power converters used in microturbines sized between 20 kW and 1 MW. The power converters permit microturbine generators, with their non-synchronous, high frequency output, to interface with the grid or local loads. The power converters produce 50- to 60-Hz power that can be used for local loads or, using interface electronics, synchronized for connection to the local feeder and/or microgrid. The power electronics enable operation in a stand-alone mode as a voltage source or in grid-connect mode as a current source. Some microturbines are designed to automatically switch between the two modes. The information obtained in this data gathering effort will provide a basis for determining how close the microturbine industry is to providing services such as voltage regulation, combined control of both voltage and current, fast/seamless mode transfers, enhanced reliability, reduced cost converters, reactive power supply, power quality, and other ancillary services. Some power quality improvements will require the addition of storage devices; therefore, the task should also determine what must be done to enable the power conversion circuits to accept a varying dc voltage source. The study will also look at technical issues pertaining to the interconnection and coordinated/compatible operation of multiple microturbines. It is important to know today if modifications to provide improved operation and additional services will entail complete redesign, selected component changes, software modifications, or the addition of power storage devices. This project is designed to provide a strong technical foundation for determining present technical needs and identifying recommendations for future work.

Staunton, R.H.

2003-07-21T23:59:59.000Z

332

Power conversion apparatus and method  

DOE Patents [OSTI]

A power conversion apparatus includes an interfacing circuit that enables a current source inverter to operate from a voltage energy storage device (voltage source), such as a battery, ultracapacitor or fuel cell. The interfacing circuit, also referred to as a voltage-to-current converter, transforms the voltage source into a current source that feeds a DC current to a current source inverter. The voltage-to-current converter also provides means for controlling and maintaining a constant DC bus current that supplies the current source inverter. The voltage-to-current converter also enables the current source inverter to charge the voltage energy storage device, such as during dynamic braking of a hybrid electric vehicle, without the need of reversing the direction of the DC bus current.

Su, Gui-Jia (Knoxville, TN)

2012-02-07T23:59:59.000Z

333

NREL: Biomass Research - Biochemical Conversion Projects  

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

NREL's projects in biochemical conversion involve three basic steps to convert biomass feedstocks to fuels: Converting biomass to sugar or other fermentation feedstock...

334

Automotive Waste Heat Conversion to Power Program  

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

or otherwise restricted information Project ID ace47lagrandeur Automotive Waste Heat Conversion to Power Program- 2009 Hydrogen Program and Vehicle Technologies Program...

335

Automotive Waste Heat Conversion to Power Program  

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

Start Date: Oct '04 Program End date: Oct '10 Percent Complete: 80% 2 Automotive Waste Heat Conversion to Power Program- Vehicle Technologies Program Annual Merit Review- June...

336

Next-Generation Thermionic Solar Energy Conversion  

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

Microscale-enhanced thermionic emitters will enable high-efficiency, solar-to-electrical conversion by taking advantage of both heat and light. Image from Stanford University...

337

"Approaches to Ultrahigh Efficiency Solar Energy Conversion"...  

Office of Science (SC) Website

"Approaches to Ultrahigh Efficiency Solar Energy Conversion" Webinar Energy Frontier Research Centers (EFRCs) EFRCs Home Centers Research Science Highlights News & Events EFRC News...

338

"Fundamental Challenges in Solar Energy Conversion" workshop...  

Office of Science (SC) Website

Fundamental Challenges in Solar Energy Conversion" workshop hosted by LMI-EFRC Energy Frontier Research Centers (EFRCs) EFRCs Home Centers Research Science Highlights News & Events...

339

Conversion Technologies for Advanced Biofuels - Carbohydrates...  

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

Production Conversion Technologies for Advanced Biofuels - Carbohydrates Production Purdue University report-out presentation at the CTAB webinar on Carbohydrates Production....

340

Conversion Technologies for Advanced Biofuels - Carbohydrates...  

Energy Savers [EERE]

Upgrading Conversion Technologies for Advanced Biofuels - Carbohydrates Upgrading PNNL report-out presentation at the CTAB webinar on carbohydrates upgrading. ctabwebinarcarbohyd...

Note: This page contains sample records for the topic "thermal conversion factor" 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

LED Street Lighting Conversion Workshop Presentations  

Broader source: Energy.gov [DOE]

This page provides links to the presentations given at the National League of Cities Mobile Workshop, LED Street Lighting Conversion: Saving Your Community Money, While Improving Public Safety,...

342

Novel Thermal Break with Simplified Manufacturing for R7 Commercial...  

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

(R5 OptiQ-Ultra Thermal Windows). Windows incorporating the foam-based sandwich-type thermal-break would achieve U-Factor of 0.14 Btuhr-ft2-F (R7 or better) with...

343

Developing a Cost Model and Methodology to Estimate Capital Costs for Thermal Energy Storage  

SciTech Connect (OSTI)

This report provides an update on the previous cost model for thermal energy storage (TES) systems. The update allows NREL to estimate the costs of such systems that are compatible with the higher operating temperatures associated with advanced power cycles. The goal of the Department of Energy (DOE) Solar Energy Technology Program is to develop solar technologies that can make a significant contribution to the United States domestic energy supply. The recent DOE SunShot Initiative sets a very aggressive cost goal to reach a Levelized Cost of Energy (LCOE) of 6 cents/kWh by 2020 with no incentives or credits for all solar-to-electricity technologies.1 As this goal is reached, the share of utility power generation that is provided by renewable energy sources is expected to increase dramatically. Because Concentrating Solar Power (CSP) is currently the only renewable technology that is capable of integrating cost-effective energy storage, it is positioned to play a key role in providing renewable, dispatchable power to utilities as the share of power generation from renewable sources increases. Because of this role, future CSP plants will likely have as much as 15 hours of Thermal Energy Storage (TES) included in their design and operation. As such, the cost and performance of the TES system is critical to meeting the SunShot goal for solar technologies. The cost of electricity from a CSP plant depends strongly on its overall efficiency, which is a product of two components - the collection and conversion efficiencies. The collection efficiency determines the portion of incident solar energy that is captured as high-temperature thermal energy. The conversion efficiency determines the portion of thermal energy that is converted to electricity. The operating temperature at which the overall efficiency reaches its maximum depends on many factors, including material properties of the CSP plant components. Increasing the operating temperature of the power generation system leads to higher thermal-to-electric conversion efficiency. However, in a CSP system, higher operating temperature also leads to greater thermal losses. These two effects combine to give an optimal system-level operating temperature that may be less than the upper operating temperature limit of system components. The overall efficiency may be improved by developing materials, power cycles, and system-integration strategies that enable operation at elevated temperature while limiting thermal losses. This is particularly true for the TES system and its components. Meeting the SunShot cost target will require cost and performance improvements in all systems and components within a CSP plant. Solar collector field hardware will need to decrease significantly in cost with no loss in performance and possibly with performance improvements. As higher temperatures are considered for the power block, new working fluids, heat-transfer fluids (HTFs), and storage fluids will all need to be identified to meet these new operating conditions. Figure 1 shows thermodynamic conversion efficiency as a function of temperature for the ideal Carnot cycle and 75% Carnot, which is considered to be the practical efficiency attainable by current power cycles. Current conversion efficiencies for the parabolic trough steam cycle, power tower steam cycle, parabolic dish/Stirling, Ericsson, and air-Brayton/steam Rankine combined cycles are shown at their corresponding operating temperatures. Efficiencies for supercritical steam and carbon dioxide (CO{sub 2}) are also shown for their operating temperature ranges.

Glatzmaier, G.

2011-12-01T23:59:59.000Z

344

Framing the Conversation: The Role of Facebook Conversations in Shopping for Eyeglasses  

E-Print Network [OSTI]

Framing the Conversation: The Role of Facebook Conversations in Shopping for Eyeglasses Karim Said Warby Parker's Facebook page and explore the ways customers formulate questions and conversations,000 Facebook posts, consisting of photos, comments, and "likes". Using statistical analyses and qualitative

Kane, Shaun K.

345

Numerical Investigation of the Effect of Chirality of Carbon Nanotube on the Interfacial Thermal Resistance  

E-Print Network [OSTI]

temperatures, molten salts and their eutectics are used in conventional high temperature thermal energy storage (TES) systems and also as coolants for energy conversion, such as in power tower configurations that are typically used in CSP applications. A major...

Hu, Yuzhu

2014-06-05T23:59:59.000Z

346

AQUIFER THERMAL ENERGY STORAGE  

E-Print Network [OSTI]

using aquifers for thermal energy storage. Problems outlinedmatical Modeling of Thermal Energy Storage in Aquifers,"ings of Aquifer Thermal Energy Storage Workshop, Lawrence

Tsang, C.-F.

2011-01-01T23:59:59.000Z

347

AQUIFER THERMAL ENERGY STORAGE  

E-Print Network [OSTI]

aquifers for thermal energy storage. Problems outlined aboveModeling of Thermal Energy Storage in Aquifers," Proceed-ings of Aquifer Thermal Energy Storage Workshop, Lawrence

Tsang, C.-F.

2011-01-01T23:59:59.000Z

348

AQUIFER THERMAL ENERGY STORAGE  

E-Print Network [OSTI]

using aquifers for thermal energy storage. Problems outlinedmatical Modeling of Thermal Energy Storage in Aquifers,"Proceed- ings of Aquifer Thermal Energy Storage Workshop,

Tsang, C.-F.

2011-01-01T23:59:59.000Z

349

Parameterizing energy conversion on rough topography  

E-Print Network [OSTI]

Parameterizing energy conversion on rough topography using bottom pressure sensors to measure form and mixing U0 Form drag pressure Tidal energy conversion Form drag causes: - internal wave generation - eddy Sound, WA Point Three Tree Previous work McCabe et al., 2006 > Measured the internal form drag

Warner, Sally

350

1982 annual report: Biomass Thermochemical Conversion Program  

SciTech Connect (OSTI)

This report provides a brief overview of the Thermochemical Conversion Program's activities and major accomplishments during fiscal year 1982. The objective of the Biomass Thermochemical Conversion Program is to generate scientific data and fundamental biomass converison process information that, in the long term, could lead to establishment of cost effective processes for conversion of biomass resources into clean fuels and petrochemical substitutes. The goal of the program is to improve the data base for biomass conversion by investigating the fundamental aspects of conversion technologies and exploring those parameters which are critical to these conversion processes. To achieve this objective and goal, the Thermochemical Conversion Program is sponsoring high-risk, long-term research with high payoff potential which industry is not currently sponsoring, nor is likely to support. Thermochemical conversion processes employ elevated temperatures to convert biomass materials into energy. Process examples include: combustion to produce heat, steam, electricity, direct mechanical power; gasification to produce fuel gas or synthesis gases for the production of methanol and hydrocarbon fuels; direct liquefaction to produce heavy oils or distillates; and pyrolysis to produce a mixture of oils, fuel gases, and char. A bibliography of publications for 1982 is included.

Schiefelbein, G.F.; Stevens, D.J.; Gerber, M.A.

1983-01-01T23:59:59.000Z

351

Gene conversion in the rice genome  

E-Print Network [OSTI]

. Over 60% of the conversions we detected were between chromosomes. We found that the inter-chromosomal conversions distributed between chromosome 1 and 5, 2 and 6, and 3 and 5 are more frequent than genome average (Z-test, P < 0.05). The frequencies...

Xu, Shuqing; Clark, Terry; Zheng, Hongkun; Vang, SÃ ¸ ren; Li, Ruiqiang; Wong, Gane Ka-Shu; Wang, Jun; Zheng, Xiaoguang

2008-02-25T23:59:59.000Z

352

Interdigitated photovoltaic power conversion device  

DOE Patents [OSTI]

A photovoltaic power conversion device has a top surface adapted to receive impinging radiation. The device includes at least two adjacent, serially connected cells. Each cell includes a semi-insulating substrate and a lateral conductivity layer of a first doped electrical conductivity disposed on the substrate. A base layer is disposed on the lateral conductivity layer and has the same electrical charge conductivity thereof. An emitter layer of a second doped electrical conductivity of opposite electrical charge is disposed on the base layer and forms a p-n junction therebetween. A plurality of spaced channels are formed in the emitter and base layers to expose the lateral conductivity layer at the bottoms thereof. A front contact grid is positioned on the top surface of the emitter layer of each cell. A first current collector is positioned along one outside edge of at least one first cell. A back contact grid is positioned in the channels at the top surface of the device for engagement with the lateral conductivity layer. A second current collector is positioned along at least one outside edge of at least one oppositely disposed second cell. Finally, an interdigitation mechanism is provided for serially connecting the front contact grid of one cell to the back contact grid of an adjacent cell at the top surface of the device.

Ward, James Scott (Englewood, CO); Wanlass, Mark Woodbury (Golden, CO); Gessert, Timothy Arthur (Conifer, CO)

1999-01-01T23:59:59.000Z

353

Interdigitated photovoltaic power conversion device  

DOE Patents [OSTI]

A photovoltaic power conversion device has a top surface adapted to receive impinging radiation. The device includes at least two adjacent, serially connected cells. Each cell includes a semi-insulating substrate and a lateral conductivity layer of a first doped electrical conductivity disposed on the substrate. A base layer is disposed on the lateral conductivity layer and has the same electrical charge conductivity thereof. An emitter layer of a second doped electrical conductivity of opposite electrical charge is disposed on the base layer and forms a p-n junction therebetween. A plurality of spaced channels are formed in the emitter and base layers to expose the lateral conductivity layer at the bottoms thereof. A front contact grid is positioned on the top surface of the emitter layer of each cell. A first current collector is positioned along one outside edge of at least one first cell. A back contact grid is positioned in the channels at the top surface of the device for engagement with the lateral conductivity layer. A second current collector is positioned along at least one outside edge of at least one oppositely disposed second cell. Finally, an interdigitation mechanism is provided for serially connecting the front contact grid of one cell to the back contact grid of an adjacent cell at the top surface of the device. 15 figs.

Ward, J.S.; Wanlass, M.W.; Gessert, T.A.

1999-04-27T23:59:59.000Z

354

Aquifer thermal energy (heat and chill) storage  

SciTech Connect (OSTI)

As part of the 1992 Intersociety Conversion Engineering Conference, held in San Diego, California, August 3--7, 1992, the Seasonal Thermal Energy Storage Program coordinated five sessions dealing specifically with aquifer thermal energy storage technologies (ATES). Researchers from Sweden, The Netherlands, Germany, Switzerland, Denmark, Canada, and the United States presented papers on a variety of ATES related topics. With special permission from the Society of Automotive Engineers, host society for the 1992 IECEC, these papers are being republished here as a standalone summary of ATES technology status. Individual papers are indexed separately.

Jenne, E.A. (ed.)

1992-11-01T23:59:59.000Z

355

REVIEW ARTIC LE MICROSCALE THERMAL BUBBLE FORMATION  

E-Print Network [OSTI]

8 C a thermal diffusivity, m r s 8 C 2 F excess heat conduction shape factor e variable in the heat, and this article discusses microscale bubble formation by using polysilicon microheaters. Figure 1a shows

Lin, Liwei

356

Thermal design through space and time  

E-Print Network [OSTI]

One of the primary roles of architecture is to control the environment at the service of a building's inhabitants. Thermal qualities are a significant factor in the overall experience one has inside and outside a building. ...

Feldgoise, Jeffrey

1997-01-01T23:59:59.000Z

357

Energy conversion & storage program. 1994 annual report  

SciTech Connect (OSTI)

The Energy Conversion and Storage Program investigates state-of-the-art electrochemistry, chemistry, and materials science technologies for: (1) development of high-performance rechargeable batteries and fuel cells; (2) development of high-efficiency thermochemical processes for energy conversion; (3) characterization of complex chemical processes and chemical species; (4) study and application of novel materials for energy conversion and transmission. Research projects focus on transport process principles, chemical kinetics, thermodynamics, separation processes, organic and physical chemistry, novel materials, and advanced methods of analysis.

Cairns, E.J.

1995-04-01T23:59:59.000Z

358

Energy Conversion & Storage Program, 1993 annual report  

SciTech Connect (OSTI)

The Energy Conversion and Storage Program applies chemistry and materials science principles to solve problems in: production of new synthetic fuels; development of high-performance rechargeable batteries and fuel cells; development of high-efficiency thermochemical processes for energy conversion; characterization of complex chemical processes and chemical species; and the study and application of novel materials for energy conversion and transmission. Projects focus on transport-process principles, chemical kinetics, thermodynamics, chemical kinetics, thermodynamics, separation processes, organic and physical chemistry, novel materials, and advanced methods of analysis.

Cairns, E.J.

1994-06-01T23:59:59.000Z

359

Solid State Energy Conversion Alliance 2nd Annual Workshop Proceedings  

SciTech Connect (OSTI)

The National Energy Technology Laboratory (NETL) and the Pacific Northwest National Laboratory (PNNL) are pleased to provide the proceedings of the second annual Solid State Energy Conversion Alliance (SECA) Workshop held on March 29-30, 2001 in Arlington. The package includes the presentations made during the workshop, a list of participants, and the results of the breakout sessions. Those sessions covered stack materials and processes, power electronics, balance of plant and thermal integration, fuel processing technologies, and stack and system performance modeling. The breakout sessions have been reported as accurately as possible; however, due to the recording and transcription process errors may have occurred. If you note any significant omissions or wish to provide additional information, we welcome your comments and hope that all stakeholder groups will use the enclosed information in their planning endeavors.

National Energy Technology Laboratory

2001-03-30T23:59:59.000Z

360

A new search for conversion of muonium to antimuonium  

SciTech Connect (OSTI)

To search for conversion of muonium (M {identical to} {mu}{sup +}e{sup {minus}}) to antimuonium ({anti M} {identical to} {mu}{sup {minus}}e{sup +}) with very low background, a new signature was implemented that required the time-coincident detection of the decay e{sup {minus}}({le} 53 MeV) with the atomic e{sup +}({approximately} 13 eV) from decay of an {anti M} atom. A 20 MeV/c {mu}{sup +} beam was stopped in a 9 mg/cm{sup 2} SiO{sub 2} powder target. Muonium, formed in the powder, diffused into a vacuum region at thermal velocities and was observed for a coincidence of {anti M} decay products. Any decay e{sup {minus}} was charge and momentum analyzed in a dipole magnet and tracked by an array of MWPCs; any atomic e{sup +} was electrostatically collected, accelerated to 5.7 keV, and magnetically transported to a microchannel plate detector. To calibrate the signature, M was observed for the first time by coincidence of its decay e{sup +} and its atomic e{sup {minus}}. A maximum likelihood analysis of the position distribution of decay origins finds no {anti M} events and less than 2 at 90% confidence. This places an upper limit on the conversion probability per atom of S{anti M} < 6.5 {times} 10{sup {minus}7} (90% C.L.), which corresponds to an upper limit of G{sub M}{anti M} < 0.16 G{sub F} (90% C.L.) on the effective coupling constant for a (V - A) conversion coupling. In a class of left-right symmetric models, the value of G{sub M}{anti M} may be in this range. 116 refs., 45 figs., 10 tabs.

Matthias, B.E.

1991-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermal conversion factor" 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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361

Energy Conversion and Transmission Facilities (South Dakota)  

Broader source: Energy.gov [DOE]

This legislation applies to energy conversion facilities designed for or capable of generating 100 MW or more of electricity, wind energy facilities with a combined capacity of 100 MW, certain...

362

Summer Series 2012 - Conversation with Omar Yaghi  

ScienceCinema (OSTI)

Jeff Miller, head of Public Affairs, sat down in conversation with Omar Yaghi, director of the Molecular Foundry, in the first of a series of "powerpoint-free" talks on July 11th 2012, at Berkeley Lab.

Omar Yaghi

2013-06-24T23:59:59.000Z

363

Ris Energy Report 2 Bioenergy conversion  

E-Print Network [OSTI]

6.3 Risø Energy Report 2 Bioenergy conversion There is a wide range of technologies to derive operate automatically and are in many regions an economic alternative, e.g. Austria and Finland

364

Overview of Capabilities Conversion System Technology  

E-Print Network [OSTI]

cycles Heat exchanger design and optimization TES Material Integration & Optimization: Solar power plantOverview of Capabilities Conversion System Technology - Power System Demonstrations - Systems Conceptual Design/Trade Space Exploration - Simulation Modeling for Manufacturing - Hybrid Energy Systems

Lee, Dongwon

365

Summer Series 2012 - Conversation with Kathy Yelick  

ScienceCinema (OSTI)

Jeff Miller, head of Public Affairs, sat down in conversation with Kathy Yelick, Associate Berkeley Lab Director, Computing Sciences, in the second of a series of "powerpoint-free" talks on July 18th 2012, at Berkeley Lab.

Kathy Yelick

2013-06-24T23:59:59.000Z

366

Potential Impacts of Hydrokinetic and Wave Energy Conversion...  

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

Potential Impacts of Hydrokinetic and Wave Energy Conversion Technologies on Aquatic Environments Potential Impacts of Hydrokinetic and Wave Energy Conversion Technologies on...

367

Advanced, High Power, Next Scale, Wave Energy Conversion Device...  

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

Advanced, High Power, Next Scale, Wave Energy Conversion Device Advanced, High Power, Next Scale, Wave Energy Conversion Device Advanced, High Power, Next Scale, Wave Energy...

368

Process Design and Economics for the Conversion of Lignocellulosic...  

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

Process Design and Economics for the Conversion of Lignocellulosic Biomass to Hydrocarbons: Dilute-Acid and Enzymatic Deconstruction of Biomass to Sugars and Biological Conversion...

369

2011 Biomass Program Platform Peer Review: Biochemical Conversion...  

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

Biochemical Conversion 2011 Biomass Program Platform Peer Review: Biochemical Conversion This document summarizes the recommendations and evaluations provided by an independent...

370

New process speeds conversion of biomass to fuels  

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

Conversion of Biomass to Fuels New process speeds conversion of biomass to fuels Scientists made a major step forward recently towards transforming biomass-derived molecules into...

371

Thermoelectric Conversion of Waste Heat to Electricity in an...  

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

truck system. schock.pdf More Documents & Publications Thermoelectric Conversion of Wate Heat to Electricity in an IC Engine Powered Vehicle Thermoelectric Conversion of Waste...

372

Thermoelectric Conversion of Exhaust Gas Waste Heat into Usable...  

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

Thermoelectric Conversion of Exhaust Gas Waste Heat into Usable Electricity Thermoelectric Conversion of Exhaust Gas Waste Heat into Usable Electricity Presents successful...

373

Conversation/Culture Partner Program Would you like to help  

E-Print Network [OSTI]

Conversation/Culture Partner Program Would you like to help another student improve their English different cultures; *Help another student improve their conversation English; and *Assist another student

Thomas, Andrew

374

aspergillus fumigatus conversion: Topics by E-print Network  

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

135 Framing the Conversation: The Role of Facebook Conversations in Shopping for Eyeglasses Computer Technologies and Information Sciences Websites Summary: Framing the...

375

antidiabetic bis-maltolato-oxovanadiumiv conversion: Topics by...  

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

88 Framing the Conversation: The Role of Facebook Conversations in Shopping for Eyeglasses Computer Technologies and Information Sciences Websites Summary: Framing the...

376

Trends in Contractor Conversion Rates | Department of Energy  

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

Contractor Conversion Rates Trends in Contractor Conversion Rates Better Buildings Residential Network Workforce Business Partners Peer Exchange Call Series: Trends in Contractor...

377

Nanostructured High-Temperature Bulk Thermoelectric Energy Conversion...  

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

High-Temperature Bulk Thermoelectric Energy Conversion for Efficient Automotive Waste Heat Recovery Nanostructured High-Temperature Bulk Thermoelectric Energy Conversion for...

378

Thermoelectric Conversion of Waste Heat to Electricity in an...  

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

on a OTR truck schock.pdf More Documents & Publications Thermoelectric Conversion of Waste Heat to Electricity in an IC Engine Powered Vehicle Thermoelectric Conversion of...

379

Conversion Technologies for Advanced Biofuels - Bio-Oil Production...  

Energy Savers [EERE]

Oil Production Conversion Technologies for Advanced Biofuels - Bio-Oil Production RTI International report-out at the CTAB webinar on Conversion Technologies for Advanced Biofuels...

380

Thermochemical Conversion: Using Heat and Catalysis to Make Biofuels...  

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

Conversion: Using Heat and Catalysis to Make Biofuels and Bioproducts Thermochemical Conversion: Using Heat and Catalysis to Make Biofuels and Bioproducts The Bioenergy...

Note: This page contains sample records for the topic "thermal conversion factor" 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

Thermoelectric Conversion of Waste Heat to Electricity in an...  

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

Conversion of Waste Heat to Electricity in an IC Engine Powered Vehicle Thermoelectric Conversion of Waste Heat to Electricity in an IC Engine Powered Vehicle Presentation from the...

382

Novel Energy Conversion Equipment for Low Temperature Geothermal...  

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

Novel Energy Conversion Equipment for Low Temperature Geothermal Resources Novel Energy Conversion Equipment for Low Temperature Geothermal Resources Project objective: Develop...

383

5th International Symposium on Multiphase Flow, Heat Mass Transfer and Energy Conversion Xian, China, 36 July 2005  

E-Print Network [OSTI]

5th International Symposium on Multiphase Flow, Heat Mass Transfer and Energy Conversion Xian, such as hemangiomas and port wine stain (PWS) birthmarks, are congenital and pro- gressive vascular malformations of the dermis. To remove them, laser energy is irradiated at appropriate wavelengths inducing permanent thermal

Aguilar, Guillermo

384

Advanced thermally stable jet fuels  

SciTech Connect (OSTI)

The Pennsylvania State University program in advanced thermally stable coal-based jet fuels has five broad objectives: (1) Development of mechanisms of degradation and solids formation; (2) Quantitative measurement of growth of sub-micrometer and micrometer-sized particles suspended in fuels during thermal stressing; (3) Characterization of carbonaceous deposits by various instrumental and microscopic methods; (4) Elucidation of the role of additives in retarding the formation of carbonaceous solids; (5) Assessment of the potential of production of high yields of cycloalkanes by direct liquefaction of coal. Future high-Mach aircraft will place severe thermal demands on jet fuels, requiring the development of novel, hybrid fuel mixtures capable of withstanding temperatures in the range of 400--500 C. In the new aircraft, jet fuel will serve as both an energy source and a heat sink for cooling the airframe, engine, and system components. The ultimate development of such advanced fuels requires a thorough understanding of the thermal decomposition behavior of jet fuels under supercritical conditions. Considering that jet fuels consist of hundreds of compounds, this task must begin with a study of the thermal degradation behavior of select model compounds under supercritical conditions. The research performed by The Pennsylvania State University was focused on five major tasks that reflect the objectives stated above: Task 1: Investigation of the Quantitative Degradation of Fuels; Task 2: Investigation of Incipient Deposition; Task 3: Characterization of Solid Gums, Sediments, and Carbonaceous Deposits; Task 4: Coal-Based Fuel Stabilization Studies; and Task 5: Exploratory Studies on the Direct Conversion of Coal to High Quality Jet Fuels. The major findings of each of these tasks are presented in this executive summary. A description of the sub-tasks performed under each of these tasks and the findings of those studies are provided in the remainder of this volume (Sections 1 through 5).

Schobert, H.H.

1999-01-31T23:59:59.000Z

385

E-Print Network 3.0 - additional potential factor Sample Search...  

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

These conversion... factors allow companies and individuals to calculate greenhouse gas (GHG) ... Source: Forest Research Agency of the UK Forestry Commission Collection:...

386

Correlation Between Structure and Thermoelectric Properties of Bulk High Performance Materials for Energy Conversion  

Broader source: Energy.gov [DOE]

Rapid solidified precursor converted into crystalline bulks under pressure produced thermoelectric materials of nano-sized grains with strongly coupled grain boundaries, achieving reduced lattice thermal conductivity and increased power factor

387

Thermal conductivity of thermal-battery insulations  

SciTech Connect (OSTI)

The thermal conductivities of a variety of insulating materials used in thermal batteries were measured in atmospheres of argon and helium using several techniques. (Helium was used to simulate the hydrogen atmosphere that results when a Li(Si)/FeS{sub 2} thermal battery ages.) The guarded-hot-plate method was used with the Min-K insulation because of its extremely low thermal conductivity. For comparison purposes, the thermal conductivity of the Min-K insulating board was also measured using the hot-probe method. The thermal-comparator method was used for the rigid Fiberfrax board and Fiberfrax paper. The thermal conductivity of the paper was measured under several levels of compression to simulate the conditions of the insulating wrap used on the stack in a thermal battery. The results of preliminary thermal-characterization tests with several silica aerogel materials are also presented.

Guidotti, R.A.; Moss, M.

1995-08-01T23:59:59.000Z

388

GT-MHR power conversion system: Design status and technical issues  

SciTech Connect (OSTI)

The Modular Helium Reactor (MHR) builds on 30 years of international gas-cooled reactor experience utilizing the unique properties of helium gas coolant, graphite moderator and coated particle fuel. To efficiently utilize the high temperature potential of the MHR, an innovative power conversion system has been developed featuring an intercooled and recuperated gas turbine. The gas turbine replaces a conventional steam turbine and its many auxiliary components. The Power Conversion System converts the thermal energy of the helium directly into electrical energy utilizing a closed Brayton cycle. The Power Conversion System draws on even more years of experience than the MHR: the world`s first closed-cycle plant, fossil fired and utilizing air as working fluid, started operation in Switzerland in 1939. Shortly thereafter, in 1945, the coupling of a closed-cycle plant to a nuclear heat generation system was conceived. Directly coupling the closed-cycle gas turbine concept to a modern, passively safe nuclear reactor opens a new chapter in power generation technology and brings with it various design challenges. Some of these challenges are associated with the direct coupling of the Power Conversion System to a nuclear reactor. Since the primary coolant is also the working fluid, the Power Conversion System has to be designed for reactor radionuclide plateout. As a result, issues like component maintainability and replaceability, and fission product effects on materials must be addressed. Other issues concern the integration of the Power Conversion System components into a single vessel. These issues include the selection of key technologies for the power conversion components such as submerged generator, magnetic bearings, seals, compact heat exchangers, and the overall system layout.

Etzel, K.; Baccaglini, G.; Schwartz, A. [General Atomics, San Diego, CA (United States); Hillman, S.; Mathis, D. [AlliedSignal Aerospace, Tempe, AZ (United States)

1994-12-01T23:59:59.000Z

389

Methods of using thermal tolerant avicelase from Acidothermus cellulolyticus  

DOE Patents [OSTI]

The invention provides a thermal tolerant (thermostable) cellulase, AviIII, that is a member of the glycoside hydrolase (GH) family. AviIII was isolated and characterized from Acidothermus cellulolyticus, and, like many cellulases, the disclosed polypeptide and/or its derivatives may be useful for the conversion of biomass into biofuels and chemicals.

Adney, William S. (Golden, CO); Vinzant, Todd B. (Golden, CO); Ding, Shih-You (Golden, CO); Himmel, Michael E. (Golden, CO)

2011-04-26T23:59:59.000Z

390

PERFORMANCE OF A CONCENTRATING PHOTOVOLTAIC/THERMAL SOLAR COLLECTOR  

E-Print Network [OSTI]

increased solar energy conversion and potential cost benefits (Fujisawa and Tani, 1997, 2001, Huang et alPERFORMANCE OF A CONCENTRATING PHOTOVOLTAIC/THERMAL SOLAR COLLECTOR Joe S Coventry Centre for Sustainable Energy Systems, Australian National University, Canberra, 0200, Australia +612 6125 3976, +612

391

Task 3.3: Warm Syngas Cleanup and Catalytic Processes for Syngas Conversion to Fuels Subtask 3: Advanced Syngas Conversion to Fuels  

SciTech Connect (OSTI)

This collaborative joint research project is in the area of advanced gasification and conversion, within the Chinese Academy of Sciences (CAS)-National Energy Technology Laboratory (NETL)-Pacific Northwest National Laboratory (PNNL) Memorandum of Understanding. The goal for this subtask is the development of advanced syngas conversion technologies. Two areas of investigation were evaluated: Sorption-Enhanced Synthetic Natural Gas Production from Syngas The conversion of synthetic gas (syngas) to synthetic natural gas (SNG) is typically catalyzed by nickel catalysts performed at moderate temperatures (275 to 325C). The reaction is highly exothermic and substantial heat is liberated, which can lead to process thermal imbalance and destruction of the catalyst. As a result, conversion per pass is typically limited, and substantial syngas recycle is employed. Commercial methanation catalysts and processes have been developed by Haldor Topsoe, and in some reports, they have indicated that there is a need and opportunity for thermally more robust methanation catalysts to allow for higher per-pass conversion in methanation units. SNG process requires the syngas feed with a higher H2/CO ratio than typically produced from gasification processes. Therefore, the water-gas shift reaction (WGS) will be required to tailor the H2/CO ratio. Integration with CO2 separation could potentially eliminate the need for a separate WGS unit, thereby integrating WGS, methanation, and CO2 capture into one single unit operation and, consequently, leading to improved process efficiency. The SNG process also has the benefit of producing a product stream with high CO2 concentrations, which makes CO2 separation more readily achievable. The use of either adsorbents or membranes that selectively separate the CO2 from the H2 and CO would shift the methanation reaction (by driving WGS for hydrogen production) and greatly improve the overall efficiency and economics of the process. The scope of this activity was to develop methods and enabling materials for syngas conversion to SNG with readily CO2 separation. Suitable methanation catalyst and CO2 sorbent materials were developed. Successful proof-of-concept for the combined reaction-sorption process was demonstrated, which culminated in a research publication. With successful demonstration, a decision was made to switch focus to an area of fuels research of more interest to all three research institutions (CAS-NETL-PNNL). Syngas-to-Hydrocarbon Fuels through Higher Alcohol Intermediates There are two types of processes in syngas conversion to fuels that are attracting R&D interest: 1) syngas conversion to mixed alcohols; and 2) syngas conversion to gasoline via the methanol-to-gasoline process developed by Exxon-Mobil in the 1970s. The focus of this task was to develop a one-step conversion technology by effectively incorporating both processes, which is expected to reduce the capital and operational cost associated with the conversion of coal-derived syngas to liquid fuels. It should be noted that this work did not further study the classic Fischer-Tropsch reaction pathway. Rather, we focused on the studies for unique catalyst pathways that involve the direct liquid fuel synthesis enabled by oxygenated intermediates. Recent advances made in the area of higher alcohol synthesis including the novel catalytic composite materials recently developed by CAS using base metal catalysts were used.

Lebarbier Dagel, Vanessa M.; Li, J.; Taylor, Charles E.; Wang, Yong; Dagle, Robert A.; Deshmane, Chinmay A.; Bao, Xinhe

2014-03-31T23:59:59.000Z

392

High Temperature Thermal Array for Next Generation Solar Thermal...  

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

High Temperature Thermal Array for Next Generation Solar Thermal Power Production High Temperature Thermal Array for Next Generation Solar Thermal Power Production This...

393

HYLIFE-II power conversion system design and cost study  

SciTech Connect (OSTI)

The power conversion system for the HYLIFE-2 fusion power plant has been defined to include the IHX's (intermediate heat exchangers) and everything that support the exchange of energy from the reactor. It is referred to simply as the BOP (balance of plant) in the rest of this report. The above is a convenient division between the reactor equipment and the rest of the fusion power plant since the BOP design and cost then depend only on the specification of the thermal power to the IHX's and the temperature of the primary Flibe coolant into and out of the IHX's, and is almost independent of the details of the reactor design. The main efforts during the first year have been on the definition and thermal-hydraulics of the IHX's, the steam generators and the steam power plant, leading to the definition of a reference BOP with the molten salt, Flibe, as the primary coolant. A summary of the key results in each of these areas is given in this report.

Hoffman, M.A. (California Univ., Davis, CA (USA). Dept. of Mechanical, Aeronautical and Materials Engineering)

1990-09-01T23:59:59.000Z

394

ORIGINAL PAPER Tunability of Propane Conversion over Alumina Supported  

E-Print Network [OSTI]

ORIGINAL PAPER Tunability of Propane Conversion over Alumina Supported Pt and Rh Catalysts William Propane conversion over alumina supported Pt and Rh (1 wt% metals loading) was examined under fuel rich conversion and almost complete propane conversion) so long as the metal particle size was sufficiently low

395

Seasonal thermal energy storage  

SciTech Connect (OSTI)

This report describes the following: (1) the US Department of Energy Seasonal Thermal Energy Storage Program, (2) aquifer thermal energy storage technology, (3) alternative STES technology, (4) foreign studies in seasonal thermal energy storage, and (5) economic assessment.

Allen, R.D.; Kannberg, L.D.; Raymond, J.R.

1984-05-01T23:59:59.000Z

396

Thermal unobtainiums? The perfect thermal conductor and  

E-Print Network [OSTI]

contribute to thermal resistance · Isotopically pure diamond has highest thermal conductivity of any material materials: disordered layered crystals Conclude with some thoughts on promising, high-risk, research even in a computer model. #12;Thermal resistance is created by Umklapp scattering (U

Braun, Paul

397

Overview of coal conversion process instrumentation  

SciTech Connect (OSTI)

A review of standard instrumentation used in the processing industries is given, and the applicability of this instrumentation to measurements in mixed phase media and hostile environments such as those encountered in coal conversion processes is considered. The major projects in coal conversion sponsored by the US Department of Energy are briefly reviewed with schematics to pinpoint areas where the standard instrumentation is inadequate or altogether lacking. The next report in this series will provide detailed requirements on the instruments needed for these processes, will review new instruments which have recently become commercially available but are not yet considered standard instrumentation, and report on the status of new instruments which are being developed and, in some cases, undergoing tests in coal conversion plants.

Liptak, B. G.; Leiter, C. P.

1980-05-01T23:59:59.000Z

398

Energy conversion & storage program. 1995 annual report  

SciTech Connect (OSTI)

The 1995 annual report discusses laboratory activities in the Energy Conversion and Storage (EC&S) Program. The report is divided into three categories: electrochemistry, chemical applications, and material applications. Research performed in each category during 1995 is described. Specific research topics relate to the development of high-performance rechargeable batteries and fuel cells, the development of high-efficiency thermochemical processes for energy conversion, the characterization of new chemical processes and complex chemical species, and the study and application of novel materials related to energy conversion and transmission. Research projects focus on transport-process principles, chemical kinetics, thermodynamics, separation processes, organic and physical chemistry, novel materials and deposition technologies, and advanced methods of analysis.

Cairns, E.J.

1996-06-01T23:59:59.000Z

399

Next-Generation Thermionic Solar Energy Conversion  

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

which, when used as a topping cycle in concentrated solar thermal electricity generation, can enable system efficiencies in excess of 50%. Innovation: Through the novel...

400

Thermal Control & System Integration  

Broader source: Energy.gov [DOE]

The thermal control and system integration activity focuses on issues such as the integration of motor and power control technologies and the development of advanced thermal control technologies....

Note: This page contains sample records for the topic "thermal conversion factor" 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

Residual oil conversion in Ashland FCC Units  

SciTech Connect (OSTI)

Ashland Petroleum Company is a production-poor refining and marketing company. A company must have refining flexibility to compete in today's crude and marketing situation. Ashland has adopted a dual approach to achieving the required refining flexibility: development and construction of the RCC process, and development of techniques to practice residual oil conversion in Ashland FCC units. This paper discusses the operating techniques Ashland has used to allow residual oil conversion to be practiced in their present day FCC's and shows some of the yields which have been achieved.

Barger, D.F.; Miller, C.B.

1983-03-01T23:59:59.000Z

402

Methanol engine conversion feasibility study: Phase 1  

SciTech Connect (OSTI)

This report documents the selection of the surface-assisted ignition technique to convert two-stroke Diesel-cycle engines to methanol fuel. This study was the first phase of the Florida Department of Transportation methanol bus engine development project. It determined both the feasibility and technical approach for converting Diesel-cycle engines to methanol fuel. State-of-the-art conversion options, associated fuel formulations, and anticipated performance were identified. Economic considerations and technical limitations were examined. The surface-assisted conversion was determined to be feasible and was recommended for hardware development.

Not Available

1983-03-01T23:59:59.000Z

403

Disruption, VDE and Runaway Electron Conversion  

E-Print Network [OSTI]

redistribute in-divertor energy Magnetic energy 35 (?) MJ For 6.5 MA, total out to VV Current quench duration 6 burn also have enough thermal and magnetic energy to put in-vessel (PFC) and torus vessel systems -- Global vertical and lateral force on VV, etc. · Thermal loading on PFCs, etc. -- Divertor targets

404

Power Conversion APEX Interim Report November, 1999  

E-Print Network [OSTI]

, the combined efficiency of the topping cycle and bottoming cycle will be less than the single cycle along. POWER CONVERSION 17.1 Steam Cycle Different steam cycles have been well developed. A study by EPRI summarized the various advanced steam cycles which maybe available for an advanced coal power plant

California at Los Angeles, University of

405

Thermochemical Conversion Pilot Plant (Fact Sheet)  

SciTech Connect (OSTI)

The state-of-the-art thermochemical conversion pilot plant includes several configurable, complementary unit operations for testing and developing various reactors, filters, catalysts, and other unit operations. NREL engineers and scientists as well as clients can test new processes and feedstocks in a timely, cost-effective, and safe manner to obtain extensive performance data on processes or equipment.

Not Available

2013-06-01T23:59:59.000Z

406

Soft materials for linear electromechanical energy conversion  

E-Print Network [OSTI]

We briefly review the literature of linear electromechanical effects of soft materials, especially in synthetic and biological polymers and liquid crystals (LCs). First we describe results on direct and converse piezoelectricity, and then we discuss a linear coupling between bending and electric polarization, which maybe called bending piezoelectricity, or flexoelectricity.

Antal Jakli; Nandor Eber

2014-07-29T23:59:59.000Z

407

Existing potato markers and marker conversions  

E-Print Network [OSTI]

Existing potato markers and marker conversions Walter De Jong PAA Workshop August 2009 1 #12;What of us will continue to use agarose gels for years to come #12;Example of a potato marker 4 PVY (Ryadg) ­ Kasai et al. 2000 Genome 43:1-8 allele specific amplification of a diagnostic product - potatoes

Douches, David S.

408

IntroductiontoProcessEngineering(PTG) conversion, balances,  

E-Print Network [OSTI]

#3/6 IntroductiontoProcessEngineering(PTG) VST rz13 1/118 3. Energy conversion, balances rz13 2/118 3.1: Energy #12;#3/6 IntroductiontoProcessEngineering(PTG) VST rz13 3/118 What is energy? · "Energy is any quantity that changes the state of a closed system when crossing the system boundary" (SEHB

Zevenhoven, Ron

409

Materials for coal conversion and utilization  

SciTech Connect (OSTI)

The Fifth Annual Conference on Materials for Coal Conversion and Utilization was held October 7-9, 1980, at the National Bureau of Standards, Gaithersburg, Maryland. Sixty-six papers have been entered individually into ERA and EDB; two had been entered previously from other sources. (LTN)

Not Available

1980-01-01T23:59:59.000Z

410

Energy Conversion: Solid-State Lighting  

E-Print Network [OSTI]

8 Energy Conversion: Solid-State Lighting E. Kioupakis1,2 , P. Rinke1,3 , A. Janotti1 , Q. Yan1 fraction of the world's energy resources [1]. Lighting has been one of the earliest applications. The inefficiency of existing light sources that waste most of the power they consume is the reason for this large

411

Steam Plant Conversion Eliminating Campus Coal Use  

E-Print Network [OSTI]

Steam Plant Conversion Eliminating Campus Coal Use at the Steam Plant #12; Flagship campus region produce 14% of US coal (TN only 0.2%) Knoxville and the TN Valley #12; UT is one of about 70 U.S. colleges and universities w/ steam plant that burns coal Constructed in 1964, provides steam for

Dai, Pengcheng

412

The Food Crises: A quantitative model of food prices including speculators and ethanol conversion  

E-Print Network [OSTI]

Recent increases in basic food prices are severely impacting vulnerable populations worldwide. Proposed causes such as shortages of grain due to adverse weather, increasing meat consumption in China and India, conversion of corn to ethanol in the US, and investor speculation on commodity markets lead to widely differing implications for policy. A lack of clarity about which factors are responsible reinforces policy inaction. Here, for the first time, we construct a dynamic model that quantitatively agrees with food prices. The results show that the dominant causes of price increases are investor speculation and ethanol conversion. Models that just treat supply and demand are not consistent with the actual price dynamics. The two sharp peaks in 2007/2008 and 2010/2011 are specifically due to investor speculation, while an underlying upward trend is due to increasing demand from ethanol conversion. The model includes investor trend following as well as shifting between commodities, equities and bonds to take ad...

Lagi, Marco; Bertrand, Karla Z; Bar-Yam, Yaneer

2011-01-01T23:59:59.000Z

413

Thermal Management of Solar Cells  

E-Print Network [OSTI]

a better thermal conductance and when ceramic particles areor ceramic fillers that enhances thermal conductivity. Solid

Saadah, Mohammed Ahmed

2013-01-01T23:59:59.000Z

414

Studies of switching field and thermal energy barrier distributions in a FePt nanoparticle system  

E-Print Network [OSTI]

Studies of switching field and thermal energy barrier distributions in a FePt nanoparticle system X dependence of the thermal stability factor, the width of the thermal energy barrier distribution- ropy energy distribution and the interaction and the thermal energy barrier distribution determined

Laughlin, David E.

415

Thermal Energy Storage for Vacuum Precoolers  

E-Print Network [OSTI]

radically creating high peak demands and low load factors. An ice bank thermal energy storage (TES) and ice water vapor condenser were installed. The existing equipment and TES system were computer monitored to determine energy consumption and potential... efficiency at night. The ice bank thermal energy storage system has a 4.4 year simple payback. While building ice, the refrigeration system operated at a 6.26 Coefficient of Performance (COP). The refrigeration system operated more efficiently at night...

Nugent, D. M.

416

Harvesting nanoscale thermal radiation using pyroelectric materials  

E-Print Network [OSTI]

High-ef?ciency direct conversion of heat to electricaloffers a novel direct en- ergy conversion technology byDirect Pyroelectric Energy Converter Pyroelectric energy conversion

Fang, Jin; Frederich, Hugo; Pilon, Laurent

2010-01-01T23:59:59.000Z

417

Novel Nuclear Powered Photocatalytic Energy Conversion  

SciTech Connect (OSTI)

The University of Massachusetts Lowell Radiation Laboratory (UMLRL) is involved in a comprehensive project to investigate a unique radiation sensing and energy conversion technology with applications for in-situ monitoring of spent nuclear fuel (SNF) during cask transport and storage. The technology makes use of the gamma photons emitted from the SNF as an inherent power source for driving a GPS-class transceiver that has the ability to verify the position and contents of the SNF cask. The power conversion process, which converts the gamma photon energy into electrical power, is based on a variation of the successful dye-sensitized solar cell (DSSC) design developed by Konarka Technologies, Inc. (KTI). In particular, the focus of the current research is to make direct use of the high-energy gamma photons emitted from SNF, coupled with a scintillator material to convert some of the incident gamma photons into photons having wavelengths within the visible region of the electromagnetic spectrum. The high-energy gammas from the SNF will generate some power directly via Compton scattering and the photoelectric effect, and the generated visible photons output from the scintillator material can also be converted to electrical power in a manner similar to that of a standard solar cell. Upon successful implementation of an energy conversion device based on this new gammavoltaic principle, this inherent power source could then be utilized within SNF storage casks to drive a tamper-proof, low-power, electronic detection/security monitoring system for the spent fuel. The current project has addressed several aspects associated with this new energy conversion concept, including the development of a base conceptual design for an inherent gamma-induced power conversion unit for SNF monitoring, the characterization of the radiation environment that can be expected within a typical SNF storage system, the initial evaluation of Konarka's base solar cell design, the design and fabrication of a range of new cell materials and geometries at Konarka's manufacturing facilities, and the irradiation testing and evaluation of these new cell designs within the UML Radiation Laboratory. The primary focus of all this work was to establish the proof of concept of the basic gammavoltaic principle using a new class of dye-sensitized photon converter (DSPC) materials based on KTI's original DSSC design. In achieving this goal, this report clearly establishes the viability of the basic gammavoltaic energy conversion concept, yet it also identifies a set of challenges that must be met for practical implementation of this new technology.

White,John R.; Kinsmen,Douglas; Regan,Thomas M.; Bobek,Leo M.

2005-08-29T23:59:59.000Z

418

A universal electromagnetic energy conversion adapter based on a metamaterial absorber  

E-Print Network [OSTI]

On the heels of metamaterial absorbers (MAs) which produce near perfect electromagnetic (EM) absorption and emission, we propose a universal electromagnetic energy conversion adapter (UEECA) based on MA. By choosing the appropriate energy converting sensors, the UEECA is able to achieve near 100% signal transfer ratio between EM energy and various forms of energy such as thermal, DC electric, or higher harmonic EM energy. The inherited subwavelength dimension and the EM field intensity enhancement can further empower UEECA in many critical applications such as energy harvesting, solar cell, and nonlinear optics. The principle of UEECA is understood with a transmission line model, which further provides a design strategy that can incorporate a variety of energy conversion devices. The concept is experimentally validated at a microwave frequency with a signal transfer ratio of 96% by choosing an RF diode as the energy converting sensor.

Xie, Yunsong; Wilson, Jeffrey D; Simons, Rainee N; Chen, Yunpeng; Xiao, John Q

2013-01-01T23:59:59.000Z

419

Low-temperature conversion of high-moisture biomass: Topical report, January 1984--January 1988  

SciTech Connect (OSTI)

Pacific Northwest Laboratory (PNL) is developing a low-temperature, catalytic process that converts high-moisture biomass feedstocks and other wet organic substances to useful gaseous and liquid fuels. The advantage of this process is that it works without the need for drying or dewatering the feedstock. Conventional thermal gasification processes, which require temperatures above 750/degree/C and air or oxygen for combustion to supply reaction heat, generally cannot utilize feedstocks with moisture contents above 50 wt %, as the conversion efficiency is greatly reduced as a result of the drying step. For this reason, anaerobic digestion or other bioconversion processes traditionally have been used for gasification of high-moisture feedstocks. However, these processes suffer from slow reaction rates and incomplete carbon conversion. 50 refs., 21 figs., 22 tabs.

Sealock, L.J. Jr.; Elliott, D.C.; Butner, R.S.; Neuenschwander, G.G.

1988-10-01T23:59:59.000Z

420

The Rhode Island Nuclear Science Center conversion from HEU to LEU fuel  

SciTech Connect (OSTI)

The 2-MW Rhode Island Nuclear Science Center (RINSC) open pool reactor was converted from 93% UAL-High Enriched Uranium (HEU) fuel to 20% enrichment U3Si2-AL Low Enriched Uranium (LEU) fuel. The conversion included redesign of the core to a more compact size and the addition of beryllium reflectors and a beryllium flux trap. A significant increase in thermal flux level was achieved due to greater neutron leakage in the new compact core configuration. Following the conversion, a second cooling loop and an emergency core cooling system were installed to permit operation at 5 MW. After re-licensing at 2 MW, a power upgrade request will be submitted to the NRC.

Tehan, Terry

2000-09-27T23:59:59.000Z

Note: This page contains sample records for the topic "thermal conversion factor" 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

Change in composition and structure of reduced crudes during conversion on contact material  

SciTech Connect (OSTI)

Four Chinese 350{degrees}C+ reduced crude feedstocks were heated thermally in the presence of a contact material at 480-540{degrees}C in a fixed bed reactor. The feed and products were fractionated into eight fractions using normal pentane precipitation and alumina adsorption chromatography and average molecular parameters calculated with a modified Brown-Ladner method. The results obtained show that the conversion of various fractions of the reduced crudes was quite different. The conversion of asphaltic substances was much higher than those of saturates and aromatics. It is shown that the CH{sub 2}/CH{sub 3} ratio, aromaticity and the numbers of aromatic, naphthenic and total ring of heavy products were obviously lower than those of reduced crudes. The effect of temperature on metal, sulfur, nitrogen removal has been also investigated. The data indicate that the removal of weak polar non-porphyrin nickel was larger than that of middle and strong polar nickel complex.

Jixu, L. (China Luoyang, Petrochemical Engineering Co. (CN)); Guohe, Q.; Wenjie, L. (Dept. of Chemical Engineering, East China Petroleum Inst., Dongying, Shandon (CN))

1991-01-01T23:59:59.000Z

422

Direct Conversion of Biomass to Fuel | ornl.gov  

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

Direct Conversion of Biomass to Fuel UGA, ORNL research team engineers microbes for the direct conversion of biomass to fuel July 11, 2014 New research from the University of...

423

Automotive Waste Heat Conversion to Electric Power using Skutterudites...  

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

Waste Heat Conversion to Electric Power using Skutterudites, TAGS, PbTe and Bi2Te3 Automotive Waste Heat Conversion to Electric Power using Skutterudites, TAGS, PbTe and Bi2Te3...

424

Genetic diversity and combining ability among sorghum conversion lines  

E-Print Network [OSTI]

on genetic similarities estimated using AFLP markers and (3) to estimate heterosis, general and specific combining ability for grain yield among the set of conversion lines. Genetic diversity was present in the set of conversion lines evaluated. For the lines...

Mateo Moncada, Rafael Arturo

2007-04-25T23:59:59.000Z

425

Thermoelectrici Conversion of Waste Heat to Electricity in an...  

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

Thermoelectrici Conversion of Waste Heat to Electricity in an IC Engine-Powered Vehicle Thermoelectrici Conversion of Waste Heat to Electricity in an IC Engine-Powered Vehicle 2005...

426

Cross section generation strategy for high conversion light water reactors  

E-Print Network [OSTI]

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

Herman, Bryan R. (Bryan Robert)

2011-01-01T23:59:59.000Z

427

Thermoelectric Conversion of Waste Heat to Electricity in an...  

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

be 500 oC deer09schock.pdf More Documents & Publications Thermoelectric Conversion of Waste Heat to Electricity in an IC Engine Powered Vehicle Thermoelectric Conversion of...

428

Direct conversion of algal biomass to biofuel  

SciTech Connect (OSTI)

A method and system for providing direct conversion of algal biomass. Optionally, the method and system can be used to directly convert dry algal biomass to biodiesels under microwave irradiation by combining the reaction and combining steps. Alternatively, wet algae can be directly processed and converted to fatty acid methyl esters, which have the major components of biodiesels, by reacting with methanol at predetermined pressure and temperature ranges.

Deng, Shuguang; Patil, Prafulla D; Gude, Veera Gnaneswar

2014-10-14T23:59:59.000Z

429

Materials for coal conversion and utilization  

SciTech Connect (OSTI)

The Sixth annual conference on materials for coal conversion and utilization was held October 13-15, 1981 at the National Bureau of Standards Gaithersburg, Maryland. It was sponsored by the US Department of Energy, the Electric Power Research Institute, the Gas Research Institute and the National Bureau of Standards. Fifty-eight papers from the proceedings have been entered individually into EDB and ERA; four papers had been entered previously from other sources. (LTN)

None,

1981-01-01T23:59:59.000Z

430

Biofuel Conversion Basics | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Year in Review: Top Five EEREDepartmentFebruary 4, 2014 BioenergyDepartmentforBiofuel Conversion

431

Holographic thermalization patterns  

E-Print Network [OSTI]

We investigate the behaviour of various correlators in N=4 super Yang Mills theory, taking finite coupling corrections into account. In the thermal limit we investigate the flow of the quasinormal modes as a function of the 't Hooft coupling. Then by using a specific model of holographic thermalization we investigate the deviation of the spectral densities from their thermal limit in an out-of-equilibrium situation. The main focus lies on the thermalization pattern with which the various plasma constituents of different energies approach their final thermal distribution as the coupling constant decreases from the infinite coupling limit. All results point towards the weakening of the usual top down thermalization pattern.

Stefan Stricker

2014-03-11T23:59:59.000Z

432

HEATS: Thermal Energy Storage  

SciTech Connect (OSTI)

HEATS Project: The 15 projects that make up ARPA-Es HEATS program, short for High Energy Advanced Thermal Storage, seek to develop revolutionary, cost-effective ways to store thermal energy. HEATS focuses on 3 specific areas: 1) developing high-temperature solar thermal energy storage capable of cost-effectively delivering electricity around the clock and thermal energy storage for nuclear power plants capable of cost-effectively meeting peak demand, 2) creating synthetic fuel efficiently from sunlight by converting sunlight into heat, and 3) using thermal energy storage to improve the driving range of electric vehicles (EVs) and also enable thermal management of internal combustion engine vehicles.

None

2012-01-01T23:59:59.000Z

433

Nanostructured High-Temperature Bulk Thermoelectric Energy Conversion...  

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

More Documents & Publications Nanostructured High-Temperature Bulk Thermoelectric Energy Conversion for Efficient Automotive Waste Heat Recovery Vehicle Technologies Office...

434

Resource Limits and Conversion Efficiency with Implications for Climate Change  

E-Print Network [OSTI]

Repowering Project, Clean Coal Topical Report Number 20,P. and Nel, H. G. 2004, Clean coal conversion options using

Croft, Gregory Donald

2009-01-01T23:59:59.000Z

435

IMPROVEMENTS IN CODED APERTURE THERMAL NEUTRON IMAGING.  

SciTech Connect (OSTI)

A new thermal neutron imaging system has been constructed, based on a 20-cm x 17-cm He-3 position-sensitive detector with spatial resolution better than 1 mm. New compact custom-designed position-decoding electronics are employed, as well as high-precision cadmium masks with Modified Uniformly Redundant Array patterns. Fast Fourier Transform algorithms are incorporated into the deconvolution software to provide rapid conversion of shadowgrams into real images. The system demonstrates the principles for locating sources of thermal neutrons by a stand-off technique, as well as visualizing the shapes of nearby sources. The data acquisition time could potentially be reduced two orders of magnitude by building larger detectors.

VANIER,P.E.

2003-08-03T23:59:59.000Z

436

Non-thermal Plasma Chemistry Non-thermal Thermal  

E-Print Network [OSTI]

-thermal Plasma Chemical Flow Reactor #12;Werner von Siemens ,, ... construction of an apparatus generation (1857) pollution control volatile organic components, NOx reforming, ... radiation sources excimer;Leuchtstoffröhre Plasma-Bildschirm Energiesparlampe #12;electrical engineering light sources textile industry

Greifswald, Ernst-Moritz-Arndt-Universität

437

E2I EPRI Assessment Offshore Wave Energy Conversion Devices  

E-Print Network [OSTI]

E2I EPRI Assessment Offshore Wave Energy Conversion Devices Report: E2I EPRI WP ­ 004 ­ US ­ Rev 1 #12;E2I EPRI Assessment - Offshore Wave Energy Conversion Devices Table of Contents Introduction Assessment - Offshore Wave Energy Conversion Devices Introduction E2I EPRI is leading a U.S. nationwide

438

Method for conversion of .beta.-hydroxy carbonyl compounds  

DOE Patents [OSTI]

A process is disclosed for conversion of salts of .beta.-hydroxy carbonyl compounds forming useful conversion products including, e.g., .alpha.,.beta.-unsaturated carbonyl compounds and/or salts of .alpha.,.beta.-unsaturated carbonyl compounds. Conversion products find use, e.g., as feedstock and/or end-use chemicals.

Lilga, Michael A. (Richland, WA); White, James F. (Richland, WA); Holladay, Johnathan E. (Kennewick, WA); Zacher, Alan H. (Kennewick, WA); Muzatko, Danielle S. (Kennewick, WA); Orth, Rick J. (Kennewick, WA)

2010-03-30T23:59:59.000Z

439

A multi-scale iterative approach for finite element modeling of thermal contact resistance  

E-Print Network [OSTI]

Surface topography has long been considered a key factor in the performance of many contact applications including thermal contact resistance. However, essentially all analytical and numerical models of thermal contact ...

Thompson, Mary Kathryn, 1980-

2007-01-01T23:59:59.000Z

440

New developments in direct nuclear fission energy conversion devices  

SciTech Connect (OSTI)

Some experimental and theoretical results obtained in the investigations undertaken at the Central Institute of Physics (CIP) in Bucharest-Romania concerning the direct nuclear energy conversion into electrical energy are presented. Open-circuit voltages (U /SUB oc/ ) of tens of kV and short-circuit currents (J /SUB sc/ ) of several ..mu..A were obtained in experiments with vacuum fission-electric cells (FEC) developed in the CIP and irradiated in the VVR-S reactor at a 10/sup 9/ neutrons/cm/sup 2/s thermal neutron flux. A gas filled FEC (GAFFC) has been devised and tested in the reactor at the same neutron flux. With this GAFEC U /SUB oc/ of hundreds of kV, J /SUB sc/ of hundreds of ..mu..A and powers of hundreds of mW have been obtained. Our researches pointed out the essential part played by the electrons in the charge transport dynamics occuring in the FEC and the influence of the secondary emission on the FEC operation.

Ursu, I.; Badescu-Singureann, A.I.; Schachter, L.

1983-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermal conversion factor" 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

Conversion of waste polyvinyl chloride (PVC) to useful chemicals  

SciTech Connect (OSTI)

Developments of recycling technologies are expected one of the most important keys for saving energy and resources, and minimization impact for environment. For instance, combustion of waste for power generation and conversion of plastics into liquid fuels have been studying for thermal energy recycling. However, PVC has been excepted from the most of these experiments. Because, heat of combustion of PVC is almost a half of other plastics, hydrogen chloride, which is produced at low temperature, corrodes the combustion chamber, and PVC causes coking reaction during pyrolysis of plastics. Numerous investigations have been conducted on degradation of PVC. However, most of these experiments were done to improve heat resistance of PVC or to study reaction mechanism of PVC degradation. Pyrolysis of PVC into liquid products have been studying since 1960`s from a view of environmental protection. Recently, Y. Maezawa et al. reported PVC was converted into oil at 600 T with sodium hydroxide. However, more than 50 % of hydrocarbon fraction of PVC was converted to residue and gas in their experiment. We are going to develop a new technology to convert of PVC into useful chemicals or liquid fuels at high efficiency by using hydrogen donor solvent.

Kamo, T.; Yamamoto, Y.; Miki, K.; Sato, Y. [National Institute for Resources and Environment, Tsukuba-shi, Ibaraki (Japan)

1995-12-31T23:59:59.000Z

442

Power Control and Optimization of Photovoltaic and Wind Energy Conversion Systems /  

E-Print Network [OSTI]

77 5.2 Wind Energy Conversion System . . . . .Optimization and Control in Wind Energy Conversion SystemsAC matrix con- verter for wind energy conversion system, in

Ghaffari, Azad

2013-01-01T23:59:59.000Z

443

Thermal contact resistance  

E-Print Network [OSTI]

This work deals with phenomena of thermal resistance for metallic surfaces in contact. The main concern of the work is to develop reliable and practical methods for prediction of the thermal contact resistance for various ...

Mikic, B. B.

1966-01-01T23:59:59.000Z

444

Thermal Processes | Department of Energy  

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

Hydrogen Production Current Technology Thermal Processes Thermal Processes Some thermal processes use the energy in various resources, such as natural gas, coal, or biomass,...

445

Graphene-based Electrochemical Energy Conversion and Storage: Fuel cells, Supercapacitors and Lithium Ion Batteries  

SciTech Connect (OSTI)

Graphene has attracted extensive research interest due to its strictly 2-dimensional (2D) structure, which results in its unique electronic, thermal, mechanical, and chemical properties and potential technical applications. These remarkable characteristics of graphene, along with the inherent benefits of a carbon material, make it a promising candidate for application in electrochemical energy devices. This article reviews the methods of graphene preparation, introduces the unique electrochemical behavior of graphene, and summarizes the recent research and development on graphene-based fuel cells, supercapacitors and lithium ion batteries. In addition, promising areas are identified for the future development of graphene-based materials in electrochemical energy conversion and storage systems.

Hou, Junbo; Shao, Yuyan; Ellis, Michael A.; Moore, Robert; Yi, Baolian

2011-09-14T23:59:59.000Z

446

Numerical models analysis of energy conversion process in air-breathing laser propulsion  

SciTech Connect (OSTI)

Energy source was considered as a key essential in this paper to describe energy conversion process in air-breathing laser propulsion. Some secondary factors were ignored when three independent modules, ray transmission module, energy source term module and fluid dynamic module, were established by simultaneous laser radiation transportation equation and fluid mechanics equation. The incidence laser beam was simulated based on ray tracing method. The calculated results were in good agreement with those of theoretical analysis and experiments.

Hong Yanji; Song Junling; Cui Cunyan; Li Qian [Academy of Equipment Command and Technology, 101416 Beijing (China)

2011-11-10T23:59:59.000Z

447

Multiwavelength Thermal Emission  

E-Print Network [OSTI]

Multiwavelength Astronomy NASA #12;Thermal Emission #12;Thermal Emission Non-thermal p-p collisions Optical IR Radio/ Microwave sources of emission massive stars, WHIM, Ly many dust, cool objects-ray ~GeV Gamma-ray ~TeV sources of emission AGN, clusters, SNR, binaries, stars AGN (obscured), shocks

California at Santa Cruz, University of

448

Thermal Performance Benchmarking (Presentation)  

SciTech Connect (OSTI)

This project will benchmark the thermal characteristics of automotive power electronics and electric motor thermal management systems. Recent vehicle systems will be benchmarked to establish baseline metrics, evaluate advantages and disadvantages of different thermal management systems, and identify areas of improvement to advance the state-of-the-art.

Moreno, G.

2014-11-01T23:59:59.000Z

449

Thermal neutron detection system  

DOE Patents [OSTI]

According to the present invention, a system for measuring a thermal neutron emission from a neutron source, has a reflector/moderator proximate the neutron source that reflects and moderates neutrons from the neutron source. The reflector/moderator further directs thermal neutrons toward an unmoderated thermal neutron detector.

Peurrung, Anthony J. (Richland, WA); Stromswold, David C. (West Richland, WA)

2000-01-01T23:59:59.000Z

450

Thermally Activated Desiccant Technology for Heat Recovery and Comfort  

SciTech Connect (OSTI)

Desiccant cooling is an important part of the diverse portfolio of Thermally Activated Technologies (TAT) designed for conversion of heat for the purpose of indoor air quality control. Thermally activated desiccant cooling incorporates a desiccant material that undergoes a cyclic process involving direct dehumidification of moist air and thermal regeneration. Desiccants fall into two categories: liquid and solid desiccants. Regardless of the type, solid or liquid, the governing principles of desiccant dehumidification systems are the same. In the dehumidification process, the vapor pressure of the moist air is higher than that of the desiccant, leading to transfer of moisture from the air to the desiccant material. By heating the desiccant, the vapor pressure differential is reversed in the regeneration process that drives the moisture from the desiccant. Figure 1 illustrates a rotary solid-desiccant dehumidifier. A burner or a thermally compatible source of waste heat can provide the required heat for regeneration.

Jalalzadeh, A. A.

2005-11-01T23:59:59.000Z

451

Thermal Hydraulic Analysis of HTGR Coupled with Hydrogen Plant  

SciTech Connect (OSTI)

The US Department of Energy is investigating the use of high-temperature gas-cooled reactors (HTGR) to produce electricity and hydrogen. Although the hydrogen production processes using the nuclear energy are in an early stage of development, coupling hydrogen plant to HTGR requires both efficient heat transfer and adequate separation of the facilities to assure that off-normal events in the production facility do not impact the nuclear plant. In anticipation of the design, development and procurement of an advanced power conversion system for HTGR, this study was initiated to identify the major design and technology options and their tradeoffs in the evaluation of power conversion system (PCS) coupled to hydrogen plant. In this study, we investigated a number of design configurations and performed thermal hydraulic analyses using various working fluids and various conditions. This paper includes a portion of thermal hydraulic results based on a direct cycle and a parallel intermediate heat exchanger (IHX) configuration option.

Chang Oh; Cliff Davis; Robert Barner; Paul Pickard

2006-06-01T23:59:59.000Z

452

Thermal properties of quaternary ammonium and pyridinium compounds  

SciTech Connect (OSTI)

In the present work an attempt was made at a comprehensive investigation of the influence of the chemical structure of a whole series of cation-active surfactants on the stability to temperature influences, and the general directions of the irreversible transformations at high temperature were established. As a result of a study of processes of thermal decomposition of quaternary ammonium and syridinium salts, quantitative correlations were established according to the influence of the chemical structure of the salts on the limits of thermal stability. On the basis of a detailed analysis of volatile pyrolysis products, concrete schemes of the conversions in the objects studied were proposed.

Aksenova, V.P.; Khar'kov, S.N.; Logovotovskaya, V.D.; Belotserkovets, N.I.; Chegolya, A.S.

1982-12-10T23:59:59.000Z

453

Solar thermal program summary: Volume 1, Overview, fiscal year 1988  

SciTech Connect (OSTI)

The goal of the solar thermal program is to improve overall solar thermal systems performance and provide cost-effective energy options that are strategically secure and environmentally benign. Major research activities include energy collection technology,energy conversion technology, and systems and applications technology for both CR and DR systems. This research is being conducted through research laboratories in close coordination with the solar thermal industry, utilities companies, and universities. The Solar Thermal Technology Program is pursuing the development of critical components and subsystems for improved energy collection and conversion devices. This development follows two basic paths: for CR systems, critical components include stretched membrane heliostats, direct absorption receivers (DARs), and transport subsystems for molten salt heat transfer fluids. These components offer the potential for a significant reduction in system costs; and for DR systems, critical components include stretched membrane dishes, reflux receivers, and Stirling engines. These components will significantly increase system reliability and efficiency, which will reduce costs. The major thrust of the program is to provide electric power. However, there is an increasing interest in the use of concentrated solar energy for applications such as detoxifying hazardous wastes and developing high-value transportable fuels. These potential uses of highly concentrated solar energy still require additional experiments to prove concept feasibility. The program goal of economically competitive energy reduction from solar thermal systems is being cooperatively addressed by industry and government.

Not Available

1989-02-01T23:59:59.000Z

454

Solar thermal power systems. Annual technical progress report, FY 1979  

SciTech Connect (OSTI)

The Solar Thermal Power Systems Program is the key element in the national effort to establish solar thermal conversion technologies within the major sectors of the national energy market. It provides for the development of concentrating mirror/lens heat collection and conversion technologies for both central and dispersed receiver applications to produce electricity, provide heat at its point of use in industrial processes, provide heat and electricity in combination for industrial, commercial, and residential needs, and ultimately, drive processes for production of liquid and gaseous fuels. This report is the second Annual Technical Progress Report for the Solar Thermal Power Systems Program and is structured according to the organization of the Solar Thermal Power Systems Program on September 30, 1979. Emphasis is on the technical progress of the projects rather than on activities and individual contractor efforts. Each project description indicates its place in the Solar Thermal Power Systems Program, a brief history, the significant achievements and real progress during FY 1979, also future project activities as well as anticipated significant achievements are forecast. (WHK)

Not Available

1980-06-01T23:59:59.000Z

455

Cohesive means in Slovenian spontaneous dialectal conversations  

E-Print Network [OSTI]

17 Cohesive means in Slovenian spontaneous dialectal conversations1 Danila zuljan kumar Intitut za slovenski jezik Frana Ramova ZRC SAZU, Raziskovalna postaja Nova Gorica, Delpinova 12, SI 5000 Nova Gorica, DZuljan@zrc-sazu.si V... Centre SASA. SCN III/1 [2010], 1734 18 Slavia Centralis 1/2010 Danila Zuljan Kumar 0 Introduction A discourse (or a text as its product) is not a structural unit, like a clause or a sentence. Rather, it is a semantic unit, which means...

Kumar, Danila Zuljan

2010-02-01T23:59:59.000Z

456

Carbon aerogel electrodes for direct energy conversion  

DOE Patents [OSTI]

A direct energy conversion device, such as a fuel cell, using carbon aerogel electrodes is described, wherein the carbon aerogel is loaded with a noble catalyst, such as platinum or rhodium and soaked with phosphoric acid, for example. A separator is located between the electrodes, which are placed in a cylinder having plate current collectors positioned adjacent the electrodes and connected to a power supply, and a pair of gas manifolds, containing hydrogen and oxygen positioned adjacent the current collectors. Due to the high surface area and excellent electrical conductivity of carbon aerogels, the problems relative to high polarization resistance of carbon composite electrodes conventionally used in fuel cells are overcome. 1 fig.

Mayer, S.T.; Kaschmitter, J.L.; Pekala, R.W.

1997-02-11T23:59:59.000Z

457

Carbon aerogel electrodes for direct energy conversion  

DOE Patents [OSTI]

A direct energy conversion device, such as a fuel cell, using carbon aerogel electrodes, wherein the carbon aerogel is loaded with a noble catalyst, such as platinum or rhodium and soaked with phosphoric acid, for example. A separator is located between the electrodes, which are placed in a cylinder having plate current collectors positioned adjacent the electrodes and connected to a power supply, and a pair of gas manifolds, containing hydrogen and oxygen positioned adjacent the current collectors. Due to the high surface area and excellent electrical conductivity of carbon aerogels, the problems relative to high polarization resistance of carbon composite electrodes conventionally used in fuel cells are overcome.

Mayer, Steven T. (San Leandro, CA); Kaschmitter, James L. (Pleasanton, CA); Pekala, Richard W. (Pleasant Hill, CA)

1997-01-01T23:59:59.000Z

458

Energy conversion device with improved seal  

DOE Patents [OSTI]

An energy conversion device comprising an improved sealing member adapted to seal a cation-permeable casing to the remainder of the device. The sealing member comprises a metal substrate which (i) bears a nonconductive and corrosion resistant coating on the major surface to which said casing is sealed, and (ii) is corrugated so as to render it flexible, thereby allowing said member to move relative to said casing without cracking the seal therebetween. Corrugations may be circumferential, radial, or both radial and circumferential so as to form dimples. The corrugated member may be in form of a bellows or in a substantially flat form, such as a disc.

Miller, Gerald R. (Salt Lake City, UT); Virkar, Anil V. (Midvale, UT)

1980-01-01T23:59:59.000Z

459

Advanced Conversion Roadmap Workshop | Department of Energy  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of EnergyEnergy Cooperation |South ValleyASGovLtr.pdfAboutSheet, April 20142-021 AdvanceConversion Roadmap

460

Sandia National Laboratories: WEC power conversion chain  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -theErikGroundbreakingStandardsTCESJBEIMarineVideosVideos Videosinpower conversion

Note: This page contains sample records for the topic "thermal conversion factor" 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

NREL: Biomass Research - Thermochemical Conversion Capabilities  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the Contributions and Achievements of Women |hitsAwardsPublicationsConversion

462

Alternative Fuels Data Center: Propane Vehicle Conversions  

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

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

463

Low-Enriched Uranium Fuel Conversion Activities for the High Flux Isotope Reactor, Annual Report for FY 2011  

SciTech Connect (OSTI)

This report describes progress made during FY11 in ORNL activities to support converting the High Flux Isotope Reactor (HFIR) from high-enriched uranium (HEU) fuel to low-enriched uranium (LEU) fuel. Conversion from HEU to LEU will require a change in fuel form from uranium oxide to a uranium-molybdenum (UMo) alloy. With both radial and axial contouring of the fuel foil and an increase in reactor power to 100 MW, calculations indicate that the HFIR can be operated with LEU fuel with no degradation in performance to users from the current levels achieved with HEU fuel. Studies are continuing to demonstrate that the fuel thermal safety margins can be preserved following conversion. Studies are also continuing to update other aspects of the reactor steady state operation and accident response for the effects of fuel conversion. Technical input has been provided to Oregon State University in support of their hydraulic testing program. The HFIR conversion schedule was revised and provided to the GTRI program. In addition to HFIR conversion activities, technical support was provided directly to the Fuel Fabrication Capability program manager.

Renfro, David G [ORNL; Cook, David Howard [ORNL; Freels, James D [ORNL; Griffin, Frederick P [ORNL; Ilas, Germina [ORNL; Sease, John D [ORNL; Chandler, David [ORNL

2012-03-01T23:59:59.000Z

464

Case study of the conversion of tangential- and wall-fired units to low-NO{sub x} combustion: Impact on fly ash quality  

SciTech Connect (OSTI)

Conversion of boilers to low-NO{sub x} combustion can influence fly ash quality in terms of the amount and forms of carbon, the overall fly ash fineness, and the relative amount of glass versus crystalline inorganic phases. All of these factors can influence the potential for a fly ash to be marketed for utilization. In this study, three coal-fired combustors, two tangentially fired and one wall-fired, all burning high-sulfur Illinois coal at the same power plant, were studied before and after conversion to low-NO{sub x} combustion. In all cases, the post-conversion fly ash was higher in carbon than the pre-conversion ash from the same unit. The fly ashes in at least two of the units would appear to have post-conversion ashes which still fall within the regional guidelines for the limit of carbon (or loss on ignition).

Hower, J.C.; Rathbone, R.F.; Robl, T.L.; Thomas, G.A. [Univ. of Kentucky, Lexington, KY (United States). Center for Applied Energy Research] [Univ. of Kentucky, Lexington, KY (United States). Center for Applied Energy Research; Haeberlin, B.O. [LG and E Energy Corp., Louisville, KY (United States)] [LG and E Energy Corp., Louisville, KY (United States); Trimble, A.S. [Univ. of Kentucky, Lexington, KY (United States). Center for Applied Energy Research] [Univ. of Kentucky, Lexington, KY (United States). Center for Applied Energy Research; [Franklin County High School, Frankfort, KY (United States)

1998-07-01T23:59:59.000Z

465

3. Energy conversion, balances, efficiency, equilibrium  

E-Print Network [OSTI]

| 20500 Turku | Finland #12;15/124 3.2: Energy transfer, First Law of Thermodynamics, Work, Power, Heat 90/124 Heat work: power cycles /1 An air power cycle and its p-V diagram 12: Heat-up at constant is to produce work (i.e. generate power) using the incoming heat streams, the thermal efficiency or Carnot

Zevenhoven, Ron

466

Advancing the Frontiers in Nanocatalysis, Biointerfaces, and Renewable Energy Conversion by Innovations of Surface Techniques  

E-Print Network [OSTI]

Biointerfaces, and Renewable Energy Conversion bychemistry) and develop renewable energy based processes.biointerfaces, and renewable energy conversion chemistry. In

Somorjai, G.A.

2010-01-01T23:59:59.000Z

467

US energy conversion and use characteristics  

SciTech Connect (OSTI)

The long-range goal of the Energy Conversion and Utilization Technology (ECUT) Program is to enhance energy productivity in all energy-use sectors by supporting research on improved efficiency and fuel switching capability in the conversion and utilization of energy. Regardless of the deficiencies of current information, a summary of the best available energy-use information is needed now to support current ECUT program planning. This document is the initial draft of this type of summary and serves as a data book that will present current and periodically updated descriptions of the following aspects of energy use: gross US energy consumption in each major energy-use sector; energy consumption by fuel type in each sector; energy efficiency of major equipment/processes; and inventories, replacement rates, and use patterns for major energy-using capital stocks. These data will help the ECUT program staff perform two vital planning functions: determine areas in which research to improve energy productivity might provide significant energy savings or fuel switching and estimate the actual effect that specific research projects may have on energy productivity and conservation. Descriptions of the data sources and examples of the uses of the different types of data are provided in Section 2. The energy-use information is presented in the last four sections; Section 3 contains general, national consumption data; and Sections 4 through 6 contain residential/commercial, industrial, and transportation consumption data, respectively. (MCW)

Imhoff, C.H.; Liberman, A.; Ashton, W.B.

1982-02-01T23:59:59.000Z

468

Conversion of DAP models to SPEEDUP  

SciTech Connect (OSTI)

Several processes at the Savannah River Site are modeled using Bechtel`s Dynamic Analysis Program (DAP) which uses a sequential modular modeling architecture. The feasibility of conversion of DAP models to SPEEDUP was examined because of the benefits associated with this de facto industry standard. The equation-based approach used in SPEEDUP gives accuracy, stability, and ease of maintenance. The DAP licenses on our site are for single-user PS/2 machines whereas the SPEEDUP product is licensed on a VAX minicomputer which provides faster execution and ease of integration with existing visualization tools. In this paper the basic unit operations of a DAP model that simulates a ventilation system are described. The basic operations were modeled with both DAP and SPEEDUP, and the two models yield results that are in close agreement. Since the basic unit operations of the DAP model have been successfully duplicated using SPEEDUP, it is feasible to proceed with model conversion. DAP subroutines and functions that involve only algebraic manipulation may be inserted directly into the SPEEDUP model or their underlying equations may be extracted and written as SPEEDUP model equations. A problem modeled in SPEEDUP running on a VAX 8810 runs approximately fifteen times faster in elapsed time than the same problem modeled with DAP on a 33 MHz Intel 80486 processor.

Aull, J.E.

1993-08-01T23:59:59.000Z

469

Oriented Nanostructures for Energy Conversion and Storage  

SciTech Connect (OSTI)

Recently the role of nanostructured materials in addressing the challenges in energy and natural resources has attracted wide attention. In particular, oriented nanostructures have demonstrated promising properties for energy harvesting, conversion and storage. The purpose of the paper is to review the synthesis and application of oriented nanostructures in a few key areas of energy technologies, namely photovoltaics, batteries, supercapacitors and thermoelectrics. Although the applications differ from field to field, one of the fundamental challenges is to improve the generation and transport of electrons and ions. We will first briefly review the several major approaches to attain oriented nanostructured films that are applicable for energy applications. We will then discuss how such controlled nanostructures can be used in photovoltaics, batteries, capacitors, thermoelectrics, and other unconventional ways of energy conversion. We will highlight the role of high surface area to maximize the surface activity, and the importance of optimum dimension and architecture, controlled pore channels and alignment of the nanocrystalline phase to optimize the electrons and ion transport. Finally, the paper will discuss the challenges in attaining integrated architectures to achieve the desired performance. Brief background information will be provided for the relevant technologies, but the emphasis is focused mainly on the nanoeffects of mostly inorganic based materials and devices.

Liu, Jun; Cao, Guozhong H.; Yang, Zhenguo; Wang, Donghai; DuBois, Daniel L.; Zhou, Xiao Dong; Graff, Gordon L.; Pederson, Larry R.; Zhang, Jiguang

2008-08-28T23:59:59.000Z

470

Conversion characteristics of 10 selected oil shales  

SciTech Connect (OSTI)

The conversion behavior of 10 oil shale from seven foreign and three domestic deposits has been studied by combining solid- and liquid-state nuclear magnetic resonance (NMR) measurements with material balance Fischer assay conversion data. The extent of aromatization of aliphatic carbons was determined. Between zero and 42% of the raw shale aliphatic carbon formed aromatic carbon during Fischer assay. For three of the shales, there was more aromatic carbon in the residue after Fisher assay than in the raw shale. Between 10 and 20% of the raw shale aliphatic carbons ended up as aliphatic carbons on the spent shale. Good correlations were found between the raw shale aliphatic carbon and carbon in the oil and between the raw shale aromatic carbon and aromatic carbon on the spent shale. Simulated distillations and molecular weight determinations were performed on the shale oils. Greater than 50% of the oil consisted of the atmospheric and vacuum gas oil boiling fractions. 14 refs., 15 figs., 1 tab.

Miknis, F.P.

1989-08-01T23:59:59.000Z

471

Statistical Thermal Models in High-Energy Nuclear Physics  

E-Print Network [OSTI]

An examination of thermal models leads to the important signature of the expected critical behavior of the hadronic matter. A presentation is mainly devoted to the final volume effects. Canonical suppression factor are calculated.

Ludwik Turko

2009-01-15T23:59:59.000Z

472

Energy Conversion DevicesEnergy Conversion Devices Fuel Cell Electrocatalyst Development Program  

E-Print Network [OSTI]

Energy Conversion Devices Fuel cells are a critical component in the Ovonic total hydrogen system approach. #12 catalysts for air electrodes for the ORFC * Ovonic Regenerative Fuel Cell #12;Texaco Ovonic Fuel Cell Ovonic Fuel Cell Company, LLC non-precious metal catalysts regenerative braking energy absorption

473

Preliminary core design studies for the advanced burner reactor over a wide range of conversion ratios.  

SciTech Connect (OSTI)

A consistent set of designs for 1000 MWt commercial-scale sodium-cooled Advance Burner Reactors (ABR) have been developed for both metal and oxide-fueled cores with conversion ratios from breakeven (CR=1.0) to fertile-free (CR=0.0). These designs are expected to satisfy thermal and irradiation damage limits based on the currently available data. The very low conversion ratio designs require fuel that is beyond the current fuel database, which is anticipated to be qualified by and for the Advanced Burned Test Reactor. Safety and kinetic parameters were calculated, but a safety analysis was not performed. Development of these designs was required to achieve the primary goal of this study, which was to generate representative fuel cycle mass flows for system studies of ABRs as part of the Global Nuclear Energy Partnership (GNEP). There are slight variations with conversion ratio but the basic ABR configuration consists of 144 fuel assemblies and between 9 and 22 primary control assemblies for both the metal and oxide-fueled cores. Preliminary design studies indicated that it is feasible to design the ABR to accommodate a wide range of conversion ratio by employing different assembly designs and including sufficient control assemblies to accommodate the large reactivity swing at low conversion ratios. The assemblies are designed to fit within the same geometry, but the size and number of fuel pins within each assembly are significantly different in order to achieve the target conversion ratio while still satisfying thermal limits. Current irradiation experience would allow for a conversion ratio of somewhat below 0.75. The fuel qualification for the first ABR should expand this experience to allow for much lower conversion ratios and higher bunrups. The current designs were based on assumptions about the performance of high and very high enrichment fuel, which results in significant uncertainty about the details of the designs. However, the basic fuel cycle performance trends such as conversion ratio and mass flow parameters are less sensitive to these parameters and the current results should provide a good basis for static and dynamic system analysis. The conversion ratio is fundamentally a ratio of the macroscopic cross section of U-238 capture to that of TRU fission. Since the microscopic cross sections only change moderately with fuel design and isotopic concentration for the fast reactor, a specific conversion ratio requires a specific enrichment. The approximate average charge enrichment (TRU/HM) is 14%, 21%, 33%, 56%, and 100% for conversion ratios of 1.0, 0.75, 0.50, 0.25, and 0.0 for the metal-fueled cores. The approximate average charge enrichment is 17%, 25%, 38%, 60%, and 100% for conversion ratios of 1.0, 0.75, 0.50, 0.25, and 0.0 for the oxide-fueled core. For the split batch cores, the maximum enrichment will be somewhat higher. For both the metal and oxide-fueled cores, the reactivity feedback coefficients and kinetics parameters seem reasonable. The maximum single control assembly reactivity faults may be too large for the low conversion ratio designs. The average reactivity of the primary control assemblies was increased, which may cause the maximum reactivity of the central control assembly to be excessive. The values of the reactivity coefficients and kinetics parameters show that some values appear to improve significantly at lower conversion ratios while others appear far less favorable. Detailed safety analysis is required to determine if these designs have adequate safety margins or if appropriate design modifications are required. Detailed system analysis data has been generated for both metal and oxide-fueled core designs over the entire range of potential burner reactors. Additional data has been calculated for a few alternative fuel cycles. The systems data has been summarized in this report and the detailed data will be provided to the systems analysis team so that static and dynamic system analyses can be performed.

Hoffman, E. A.; Yang, W. S.; Hill, R. N.; Nuclear Engineering Division

2008-05-05T23:59:59.000Z

474

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

E-Print Network [OSTI]

1997. [15] R DiPippo, Geothermal Power Plants: Principles,Kalina, "New Binary Geothermal Power System," in ProceedingsConference on Geothermal Power Engineering, Sochi, Russia,

Ho, Tony

2012-01-01T23:59:59.000Z

475

Ocean Thermal Energy Conversion (OTEC) A New Secure Renewable Energy Source  

E-Print Network [OSTI]

gradients to drive a steam engine * A Preliminary Assessment of OTEC Resources ASME 3/2007 g Surface vs Deep

476

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

E-Print Network [OSTI]

engineer, improved upon the steam engine then patented theBoulton and Watt steam engine in 1775 [6]. Since then thean atmospheric heat engine that used steam) was developed by

Ho, Tony

2012-01-01T23:59:59.000Z

477

Comparison of Biological and Thermal (Pyrolysis) Pathways for Conversion of Lignocellulose to Biofuels  

E-Print Network [OSTI]

D study. This journey was great because of her and Tinku being around! Thanks to my advisor Dr. Capareda for the diverse bio-energy research opportunity at BETA lab, Dr. El-Halwagi for the unconditional care in every step since I joined TX A... to produce bio-energy from biomass ....................... 3 1.2.2 Pretreatment and hydrolysis in lignocellulose breakdown ....................... 5 1.2.3 Pyrolysis oil upgrade technology...

Imam, Tahmina 1983-

2012-11-30T23:59:59.000Z

478

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

479

Micro/Nano-Scale Phase Change Systems for Thermal Management and Solar Energy Conversion Applications  

E-Print Network [OSTI]

Organometallic Frames for Solar Energy Storage, Berkeley. [and Photovoltaic Solar Energy Converters, American ChemicalNocera D. G. , 2010, Solar Energy Supply and Storage for

Coso, Dusan

2013-01-01T23:59:59.000Z

480

Anisotropies in Non-Thermal Distortions of Cosmic Light from Photon-Axion Conversion  

E-Print Network [OSTI]

Ultralight axions which couple sufficiently strongly to photons can leave imprints on the sky at diverse frequencies by mixing with cosmic light in the presence of background magnetic fields. We explore such direction dependent grey-body distortions of the CMB spectrum, enhanced by resonant conditions in the IGM plasma. We also find that if such axions are produced in the early universe and represent a subdominant dark radiation component today, they could convert into X-rays in supervoids, and brighten them at X-ray frequencies.

Guido D'Amico; Nemanja Kaloper

2015-01-07T23:59:59.000Z

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


481

Anisotropies in Non-Thermal Distortions of Cosmic Light from Photon-Axion Conversion  

E-Print Network [OSTI]

Ultralight axions which couple sufficiently strongly to photons can leave imprints on the sky at diverse frequencies by mixing with cosmic light in the presence of background magnetic fields. We explore such direction dependent grey-body distortions of the CMB spectrum, enhanced by resonant conditions in the IGM plasma. We also find that if such axions are produced in the early universe and represent a subdominant dark radiation component today, they could convert into X-rays in supervoids, and brighten them at X-ray frequencies.

D'Amico, Guido

2015-01-01T23:59:59.000Z

482

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

E-Print Network [OSTI]

Optimization," in ASME International Joint Power Generationfor Solar Rankine Power Generation," ASME Journal of SolarBrayton-Cycle Solar Power Towers," ASME Journal of Solar

Ho, Tony

2012-01-01T23:59:59.000Z

483

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

E-Print Network [OSTI]

organic Rankine cycle," Renewable Energy, vol. 4, pp. 1196-power cycle driven by renewable energy sources," Energy,geothermal resources," Renewable Energy, vol. 37, pp. 364-

Ho, Tony

2012-01-01T23:59:59.000Z

484

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

E-Print Network [OSTI]

13] and another 1MWe CSP plant also in Arizona that uses aa natural place to locate CSP plants; unfortunately, desertsa heat sink. Therefore, CSP plants that reduce their cooling

Ho, Tony

2012-01-01T23:59:59.000Z

485

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

E-Print Network [OSTI]

Closed- Brayton-Cycle Solar Power Towers," ASME Journal ofNaF-NaBF4) cooled solar power tower plant is presented;high temperature solar power tower designs to date.

Ho, Tony

2012-01-01T23:59:59.000Z

486

Micro/Nano-Scale Phase Change Systems for Thermal Management and Solar Energy Conversion Applications  

E-Print Network [OSTI]

valve in order to maintain a constant pressure. From these experiments we extract the heat transfer coefficient

Coso, Dusan

2013-01-01T23:59:59.000Z

487

Micro/Nano-Scale Phase Change Systems for Thermal Management and Solar Energy Conversion Applications  

E-Print Network [OSTI]

Enhancement in Pool Boiling of Nano-fluids, InternationalLiquid Spreading Due to Nano/Microstructures on the CriticalWicking Action of Micro/Nano Structures on Pool Boiling

Coso, Dusan

2013-01-01T23:59:59.000Z

488

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

E-Print Network [OSTI]

Systems for Industrial Waste Heat Recovery. c DanielCycle for Cement Kiln Waste Heat Recovery Power Plants. and high temperature waste heat reclamation and solar

Ho, Tony

2012-01-01T23:59:59.000Z

489

Micro/Nano-Scale Phase Change Systems for Thermal Management and Solar Energy Conversion Applications  

E-Print Network [OSTI]

Nocera D. G. , 2010, Solar Energy Supply and Storage forof Abiotic Photo-chemical Solar Energy Storage Systems,Power Plants, Journal of Solar Energy Engineering, 124 (2),

Coso, Dusan

2013-01-01T23:59:59.000Z

490

Ocean thermal energy conversion power system development. Final design report: PSD-I, Phase II  

SciTech Connect (OSTI)

The PSD-I program provides a heat exchanger sytem consisting of an evaporator, condenser and various ancillaries with ammonia used as a working fluid in a closed simulated Rankine cycle. It is to be installed on the Chepachet Research Vessel for test and evaluation of a number of OTEC concepts in a true ocean environment. It is one of several test articles to be tested. Primary design concerns include control of biofouling, corrosion and erosion of aluminum tubes, selection of materials, and the development of a basis for scale-up to large heat exchangers so as to ultimately demonstrate economic feasibility on a commercial scale. The PSD-I test article is devised to verify thermodynamic, environmental, and mechanical performance of basic design concepts. The detailed design, development, fabrication, checklist, delivery, installation support, and operation support for the Test Article Heat Exchangers are described. (WHK)

None

1980-06-30T23:59:59.000Z

491

Micro/Nano-Scale Phase Change Systems for Thermal Management and Solar Energy Conversion Applications  

E-Print Network [OSTI]

and Photovoltaic Solar Energy Converters, American ChemicalNocera D. G. , 2010, Solar Energy Supply and Storage forof Abiotic Photo-chemical Solar Energy Storage Systems,

Coso, Dusan

2013-01-01T23:59:59.000Z

492

Micro/Nano-Scale Phase Change Systems for Thermal Management and Solar Energy Conversion Applications  

E-Print Network [OSTI]

Nomenclature A b c l c solu c solv C CHF d d c D D b D c E aL b L c L film m m m solu m solv M Surface area of a planeH storage ( m solu c solu ? m solv c solv ) in which ?T

Coso, Dusan

2013-01-01T23:59:59.000Z

493

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

E-Print Network [OSTI]

steam turbines, expensive reinforcing material is necessaryof the turbine or special reinforcing material is necessaryrequiring reinforcing material for the turbine blades while

Ho, Tony

2012-01-01T23:59:59.000Z

494

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

495

Rapid Solar-Thermal Conversion of Biomass to Syngas - Energy Innovation  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -the Mid-Infrared at 278, 298, and 323Program2Raftopoulos(MeVcm²/mg)Rapid

496

Progress from DOE EF RC: Solid-State Solar-Thermal Energy Conversion Center  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion | Department ofT ib l L d FNEPA/309Department ofDepartment ofProgram(S3TEC ) | Department of

497

Solid-State Solar-Thermal Energy Conversion Center (S3TEC) | U.S. DOE  

Office of Science (SC) Website

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear SecurityTensile Strain Switched5 IndustrialIsadore Perlman,BiosScience (SC) RegionalRegionals »Office of

498

Open cycle ocean thermal energy conversion steam control and bypass system  

DOE Patents [OSTI]

Two sets of hinged control doors for regulating motive steam flow from an evaporator to a condenser alternatively through a set of turbine blades in a steam bypass around the turbine blades. The evaporator has a toroidal shaped casing situated about the turbine's vertical axis of rotation and an outlet opening therein for discharging motive steam into an annular steam flow path defined between the turbine's radially inner and outer casing structures. The turbine blades extend across the steam flow path intermediate the evaporator and condenser. The first set of control doors is arranged to prevent steam access to the upstream side of the turbine blades and the second set of control doors acts as a bypass around the blades so as to maintain equilibrium between the evaporator and condenser during non-rotation of the turbine. The first set of control doors preferably extend, when closed, between the evaporator casing and the turbine's outer casing and, when open, extend away from the axis of rotation. The second set of control doors preferably constitute a portion of the turbine's outer casing downstream from the blades when closed and extend, when open, toward the axis of rotation. The first and second sets of control doors are normally held in the open and closed positions respectively by locking pins which may be retracted upon detecting an abnormal operating condition respectively to permit their closing and opening and provide steam flow from the evaporator to the condenser.

Wittig, J. Michael (West Goshen, PA); Jennings, Stephen J. (Radnor Township, Delaware County, PA)

1980-01-01T23:59:59.000Z

499

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

E-Print Network [OSTI]

using solar heat source," Solar Energy, vol. 73, pp. 385-sources, part I: Theoretical investigation," Journal of Solar Energy,sources, part II: Experimental investigation," Journal of Solar Energy,

Ho, Tony

2012-01-01T23:59:59.000Z

500

Thermal and Economic Analyses of Energy Saving by Enclosing Gas Turbine Combustor Section  

E-Print Network [OSTI]

) thermography inspection indicated a high-temperature area (500~560F) at the combustor section of the GE Frame 5 gas turbine of Dynegy Gas Processing Plant at Venice, Louisiana. To improve the thermal efficiency and reduce energy cost, thermal... within the natural gas industry, the Venice plant is seeking various means to reduce cost. As part of the project to improve the energy efficiency of the plant and thus reduce energy costs, Dynegy contracted the Energy Conversion & Conservation...

Li, X.; Wang, T.; Day, B.

2006-01-01T23:59:59.000Z