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1

General-purpose heat source: Research and development program. Radioisotope thermoelectric generator impact tests: RTG-1 and RTG-2  

SciTech Connect (OSTI)

The General-Purpose Heat Source (GPHS) provides power for space missions by transmitting the heat of {sup 238}Pu decay to an array of thermoelectric elements in a radioisotope thermoelectric generator (RTG). Because the potential for a launch abort or return from orbit exists for any space mission, the heat source response to credible accident scenarios is being evaluated. The first two RTG Impact Tests were designed to provide information on the response of a fully loaded RTG to end-on impact against a concrete target. The results of these tests indicated that at impact velocities up to 57 m/s the converter shell and internal components protect the GPHS capsules from excessive deformation. At higher velocities, some of the internal components of the RTG interact with the GPHS capsules to cause excessive localized deformation and failure.

Reimus, M.A.H.; Hinckley, J.E.; George, T.G.

1996-07-01T23:59:59.000Z

2

Real-time monitoring during transportation of a radioisotope thermoelectric generator (RTG) using the radioisotope thermoelectric generator transportation system (RTGTS)  

SciTech Connect (OSTI)

The Radioisotopic Thermoelectric Generators (RTGs) that will be used to support the Cassini mission will be transported in the Radioisotope Thermoelectric Generator Transportation System (RTGTS). To ensure that the RTGs will not be affected during transportation, all parameters that could adversely affect RTG's performance must be monitored. The Instrumentation and Data Acquisition System (IDAS) for the RTGTS displays, monitors, and records all critical packaging and trailer system parameters. The IDAS also monitors the package temperature control system, RTG package shock and vibration data, and diesel fuel levels for the diesel fuel tanks. The IDAS alarms if any of these parameters reach an out-of-limit condition. This paper discusses the real-time monitoring during transportation of the Cassini RTGs using the RTGTS IDAS.

Pugh, Barry K. [EG and G Mound Applied Technologies P.O. Box 3000 Miamisburg, Ohio 45343-3000 (United States)

1997-01-10T23:59:59.000Z

3

Real-time monitoring during transportation of a radioisotope thermoelectric generator (RTG) using the radioisotope thermoelectric generator transportation system (RTGTS)  

SciTech Connect (OSTI)

The Radioisotopic Thermoelectric Generators (RTGs) that will be used to support the Cassini mission will be transported in the Radioisotope Thermoelectric Generator Transportation System (RTGTS). To ensure that the RTGs will not be affected during transportation, all parameters that could adversely affect RTG{close_quote}s performance must be monitored. The Instrumentation and Data Acquisition System (IDAS) for the RTGTS displays, monitors, and records all critical packaging and trailer system parameters. The IDAS also monitors the package temperature control system, RTG package shock and vibration data, and diesel fuel levels for the diesel fuel tanks. The IDAS alarms if any of these parameters reach an out-of-limit condition. This paper discusses the real-time monitoring during transportation of the Cassini RTGs using the RTGTS IDAS. {copyright} {ital 1997 American Institute of Physics.}

Pugh, B.K. [EGG Mound Applied Technologies P.O. Box 3000 Miamisburg, Ohio45343-3000 (United States)

1997-01-01T23:59:59.000Z

4

Modular Radioisotope Thermoelectric Generator (RTG) Program. Final technical report  

SciTech Connect (OSTI)

Section 2.0 of this report summarizes the MOD-RTG reference flight design, and Section 3.0 discusses the Ground Demonstration System design. Multicouple technology development is discussed in Section 4.0, and Section 5.0 lists all published technical papers prepared during the course of the contract.

Not Available

1992-12-31T23:59:59.000Z

5

Modular Isotopic Thermoelectric Generator  

SciTech Connect (OSTI)

Advanced RTG concepts utilizing improved thermoelectric materials and converter concepts are under study at Fairchild for DOE. The design described here is based on DOE's newly developed radioisotope heat source, and on an improved silicon-germanium material and a multicouple converter module under development at Syncal. Fairchild's assignment was to combine the above into an attractive power system for use in space, and to assess the specific power and other attributes of that design. The resultant design is highly modular, consisting of standard RTG slices, each producing ~24 watts at the desired output voltage of 28 volt. Thus, the design could be adapted to various space missions over a wide range of power levels, with little or no redesign. Each RTG slice consists of a 250-watt heat source module, eight multicouple thermoelectric modules, and standard sections of insulator, housing, radiator fins, and electrical circuit. The design makes it possible to check each thermoelectric module for electrical performance, thermal contact, leaktightness, and performance stability, after the generator is fully assembled; and to replace any deficient modules without disassembling the generator or perturbing the others. The RTG end sections provide the spring-loaded supports required to hold the free-standing heat source stack together during launch vibration. Details analysis indicates that the design offers a substantial improvement in specific power over the present generator of RTGs, using the same heat source modules. There are three copies in the file.

Schock, Alfred

1981-04-03T23:59:59.000Z

6

Thermoelectric Generators 1. Thermoelectric generator  

E-Print Network [OSTI]

. Cold Hot I - -- - - - - -- Figure 1 Electron concentration in a thermoelectric material. #12;2 A large1 Thermoelectric Generators HoSung Lee 1. Thermoelectric generator 1.1 Basic Equations In 1821 on the direction of current and material [3]. This is called the Thomson effect (or Thomson heat). These three

Lee, Ho Sung

7

Radioisotope thermoelectric generator reliability and safety  

SciTech Connect (OSTI)

There are numerous occasions when a planetary mission requires energy in remote areas of the solar system. Anytime power is required much beyond Mars or the Asteroid Belts, solar power is not an option. The radioisotope thermoelectric generator (RTG) was developed for such a mission requirement. It is a relatively small and lightweight power source that can produce power under adverse conditions. Just this type of source has become the backbone of the power system for far outer plant exploration. Voyagers I and II are utilizing RTGs, which will soon power the Galileo spacecraft to Jupiter and the Ulysses spacecraft to study the solar poles. The paper discusses RTG operation including thermoelectric design, converter design, general-purpose heat source; RTG reliability including design, testing, experience, and launch approval; and RTG safety issues and methods of ensuring safety.

Campbell, R.; Klein, J.

1989-01-01T23:59:59.000Z

8

Thermoelectric generator  

SciTech Connect (OSTI)

A thermoelectric generator unit is described comprising: a hot side heat exchanger including a plate having extruded retention posts projecting from one surface of the plate, and fins adapted for contact with a heating source. The fins are positioned between two of the retention posts. Retention rods are inserted between the retention posts and the base of the fins to retain the fin in thermal contact with the plate surface upon insertion of the retention rod between the engaging surface of the post and the corresponding fin. Thermoelectric semi-conductor modules are in thermal contact with the opposite side of the hot side heat exchanger plate from the contact with the fins. The modules are arranged in a grid pattern so that heat flow is directed into each of the modules from the hot side heat exchanger. The modules are connected electrically so as to combine their electrical output; and a cold side heat exchanger is in thermal contact with the modules acting as a heat sink on the opposite side of the module from the hot side heat exchanger plate so as to produce a thermal gradient across the modules.

Shakun, W.; Bearden, J.H.; Henderson, D.R.

1988-03-29T23:59:59.000Z

9

Radioisotope thermoelectric generator transport trailer system  

SciTech Connect (OSTI)

The Radioisotope Thermoelectric Generator (RTG) Transportation System, designated as System 100, comprises four major systems. The four major systems are designated as the Packaging System (System 120), Trailer System (System 140), Operations and Ancillary Equipment System (System 160), and Shipping and Receiving Facility Transport System (System 180). Packaging System (System 120), including the RTG packaging is licensed (regulatory) hardware; it is certified by the U.S. Department of Energy to be in accordance with Title 10, {ital Code} {ital of} {ital Federal} {ital Regulations}, Part 71 (10 CFR 71). System 140, System 160, and System 180 are nonlicensed (nonregulatory) hardware. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}

Ard, K.E.; King, D.A.; Leigh, H.; Satoh, J.A. [Westinghouse Hanford Company, P.O. Box 1970, MSIN N1-25, Richland, Washington 99352 (United States)

1995-01-20T23:59:59.000Z

10

End-on radioisotope thermoelectric generator impact tests  

SciTech Connect (OSTI)

The General-Purpose Heat Source (GPHS) provides power for space missions by transmitting the heat of {sup 238}Pu decay to an array of thermoelectric elements in a radioisotope thermoelectric generator (RTG). The modular GPHS design was developed to address both survivability during launch abort and return from orbit. The first two RTG Impact Tests were designed to provide information on the response of a fully loaded RTG to end-on impact against a concrete target. The results of these tests indicated that at impact velocities up to 57 m/s the converter shell and internal components protect the GPHS capsules from excessive deformation. At higher velocities, some of the internal components of the RTG interact with the GPHS capsules to cause excessive localized deformation and failure. {copyright} {ital 1997 American Institute of Physics.}

Reimus, M.A.; Hinckley, J.E. [Los Alamos National Laboratory P.O. Box 1663, MS-E502 Los Alamos, New Mexico87545 (United States)

1997-01-01T23:59:59.000Z

11

End-on radioisotope thermoelectric generator impact tests  

SciTech Connect (OSTI)

The General-Purpose Heat Source (GPHS) provides power for space missions by transmitting the heat of [sup 238]Pu decay to an array of thermoelectric elements in a radioisotope thermoelectric generator (RTG). The modular GPHS design was developed to address both survivability during launch abort and return from orbit. The first two RTG Impact Tests were designed to provide information on the response of a fully loaded RTG to end-on impact against a concrete target. The results of these tests indicated that at impact velocities up to 57 m/s the converter shell and internal components protect the GPHS capsules from excessive deformation. At higher velocities, some of the internal components of the RTG interact with the GPHS capsules to cause excessive localized deformation and failure.

Reimus, M.A.H.; Hhinckley, J.E.

1997-01-01T23:59:59.000Z

12

Waste Heat Recovery Opportunities for Thermoelectric Generators...  

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

Waste Heat Recovery Opportunities for Thermoelectric Generators Waste Heat Recovery Opportunities for Thermoelectric Generators Thermoelectrics have unique advantages for...

13

Radioisotope thermoelectric generator/thin fragment impact test  

SciTech Connect (OSTI)

The General-Purpose Heat Source (GPHS) provides power for space missions by transmitting the heat of {sup 238}Pu decay to an array of thermoelectric elements in a radioisotope thermoelectric generator (RTG). Because the potential for a launch abort or return from orbit exists for any space mission, the heat source response to credible accident scenarios is being evaluated. This test was designed to provide information on the response of a loaded RTG to impact by a fragment similar to the type of fragment produced by breakup of the spacecraft propulsion module system (PMS). The results of this test indicated that impact of the RTG by a thin aluminum fragment traveling at 306 m/s may result in significant damage to the converter housing, failure of one fueled clad, and release of a small quantity of fuel.

Reimus, M. A. H.; Hinckley, J. E. [Los Alamos National Laboratory, P.O. Box 1663, MS-E502, Los Alamos, New Mexico 87545 (United States)

1998-01-15T23:59:59.000Z

14

Radioisotope thermoelectric generator/thin fragment impact test  

SciTech Connect (OSTI)

The General-Purpose Heat Source (GPHS) provides power for space missions by transmitting the heat of {sup 238}Pu decay to an array of thermoelectric elements in a radioisotope thermoelectric generator (RTG). Because the potential for a launch abort or return from orbit exists for any space mission, the heat source response to credible accident scenarios is being evaluated. This test was designed to provide information on the response of a loaded RTG to impact by a fragment similar to the type of fragment produced by breakup of the spacecraft propulsion module system (PMS). The results of this test indicated that impact of the RTG by a thin aluminum fragment traveling at 306 m/s may result in significant damage to the converter housing, failure of one fueled clad, and release of a small quantity of fuel. {copyright} {ital 1998 American Institute of Physics.}

Reimus, M.A.; Hinckley, J.E. [Los Alamos National Laboratory, P.O. Box 1663, MS-E502, Los Alamos, New Mexico 87545 (United States)

1998-01-01T23:59:59.000Z

15

Radioisotope thermoelectric generator/thin fragment impact test  

SciTech Connect (OSTI)

The General-Purpose Heat Source (GPHS) provides power for space missions by transmitting the heat of {sup 238}Pu decay to an array of thermoelectric elements in a radioisotope thermoelectric generator (RTG). Because the potential for a launch abort or return from orbit exists for any space mission, the heat source response to credible accident scenarios is being evaluated. This test was designed to provide information on the response of a loaded RTG to impact by a fragment similar to the type of fragment produced by breakup of the spacecraft propulsion module system (PMS). The results of this test indicated that impact of the RTG by a thin aluminum fragment traveling at 306 m/s may result in significant damage to the convertor housing, failure of one fueled clad, and release of a small quantity of fuel.

Reimus, M.A.H.; Hinckley, J.E.

1998-12-31T23:59:59.000Z

16

EIS-0302: Transfer of the Heat Source/Radioisotope Thermoelectric Generator Assembly and Test Operations From the Mound Site  

Broader source: Energy.gov [DOE]

This EIS analyzes DOE's proposed transfer of the Heat Source/Radioisotope Thermoelectric Generator (HS/RTG) operations at the Mound Site near Miamisburg, Ohio, to an alternative DOE site.

17

Mars Rover RTG Study  

SciTech Connect (OSTI)

This report summarizes the results of a Radioisotope Thermoelectric Generator (RTG) design study conducted by Fairchild Space Company at the direction of the U.S. Department of Energy's Office of SpecialApplications, in suppport of the Mars Rover and Sample Return mission under investigation at NASA's Jet Propulsion Laboratory. The report is a rearranged, updated, and significantly expanded amalgam of three interrelated papers presented at the 24th Intersocity Energy Conversion Engineering Conference (IECEC) at Arlington, Virginia, on August 10, 1989.

Schock, Alfred

1989-08-25T23:59:59.000Z

18

Proposed strontium radiosotope thermoelectric generator fuel encapsulation facility  

SciTech Connect (OSTI)

The proposed Fuel Encapsulation Facility is a fully equipped facility for processing and encapsulating strontium Radioisotope Thermoelectric Generator (RTG) fuel from presently available Waste Encapsulation and Storage Facility (WESF) capsules. The facility location is on the second building level below ground of the Fuels and Materials Examination Facility (FMEF), Cells 142, 143, and 145. Capsules containing strontium fluoride (SrF[sub 2]) would be received from the WESF in Cell 145 and transferred to the three adjacent cells for processing and encapsulation into the final RTG fuel configuration.

Adkins, H.E. (Westinghouse Hanford Company, P.O. Box 1970, Mail Stop N1-42, Richland, Washington 99352 (United States))

1993-01-10T23:59:59.000Z

19

A facility to remotely assemble radioisotope thermoelectric generators  

SciTech Connect (OSTI)

Radioisotope Thermoelectric Generators (RTGs) are electrical power sources that use heat from decaying radioisotopes to directly generate electrical power. The RTG assembly process is performed in an inert atmosphere inside a large glovebox, which is surrounded by radiation shielding to reduce exposure to neutron and gamma radiation from the radioisotope heat source. In the past, allowable dose rate limits have allowed direct, manual assembly methods; however, current dose rate limits require a thicker radiation shielding that makes direct, manual assembly infeasible. To minimize RTG assembly process modifications, telerobotic systems are being investigated to perform remote assembly tasks. Telerobotic systems duplicate human arm motion and incorporate force feedback sensitivity to handle objects and tools in a human-like manner. A telerobotic system with two arms and a three-dimensional (3-D) vision system can be used to perform remote RTG assembly tasks inside gloveboxes and cells using unmodified, normal hand tools.

Engstrom, J.W.; Goldmann, L.H.; Truitt, R.W.

1992-07-01T23:59:59.000Z

20

A small RTG for future planetary missions  

SciTech Connect (OSTI)

A design study was conducted to characterize conceptual designs for a small Radioisotope Thermoelectric Generator (RTG), one that might be suitable for future planetary missions. Conceptual design configurations were derived from the General Purpose Heat Source{emdash}RTG (GPHS-RTG), with the design goal of providing 70 watts of electrical power at the end of a ten year mission life. Design improvements for mass minimization were evaluated, considering also the technical risk of the corresponding engineering development required. It was concluded that an RTG mass of 18 kg could be achieved with moderate risk. Further studies are recommended to define in detail the testing and other development activities that would be required to bring the conceptual design for such an RTG to reality. {copyright} {ital 1997 American Institute of Physics.}

Cockfield, R.D.; Kull, R.A. [Lockheed Martin Missiles Space P.O. Box 8555 Philadelphia, Pennsylvania19101 (United States)

1997-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermoelectric generator rtg" 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

Skutterudite Thermoelectric Generator For Automotive Waste Heat...  

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

Skutterudite Thermoelectric Generator For Automotive Waste Heat Recovery Skutterudite Thermoelectric Generator For Automotive Waste Heat Recovery Skutterudite TE modules were...

22

Superconducting thermoelectric generator  

DOE Patents [OSTI]

Thermoelectricity is produced by applying a temperature differential to dissimilar electrically conducting or semiconducting materials, thereby producing a voltage that is proportional to the temperature difference. Thermoelectric generators use this effect to directly convert heat into electricity; however, presently-known generators have low efficiencies due to the production of high currents which in turn cause large resistive heating losses. Some thermoelectric generators operate at efficiencies between 4% and 7% in the 800{degrees} to 1200{degrees}C range. According to its major aspects and bradly stated, the present invention is an apparatus and method for producing electricity from heat. In particular, the invention is a thermoelectric generator that juxtaposes a superconducting material and a semiconducting material - so that the superconducting and the semiconducting materials touch - to convert heat energy into electrical energy without resistive losses in the temperature range below the critical temperature of the superconducting material. Preferably, an array of superconducting material is encased in one of several possible configurations within a second material having a high thermal conductivity, preferably a semiconductor, to form a thermoelectric generator.

Metzger, J.D.; El-Genk, M.S.

1994-01-01T23:59:59.000Z

23

Work plan for the fabrication of the radioisotope thermoelectric generator transportation system package mounting  

SciTech Connect (OSTI)

The Radioisotope Thermoelectric Generator (RTG) has available a dedicated system for the transportation of RTG payloads. The RTG Transportation System (System 100) is comprised of four systems; the Package (System 120), the Semi-trailer (System 140), the Gas Management (System 160), and the Facility Transport (System 180). This document provides guidelines on the fabrication, technical requirements, and quality assurance of the Package Mounting (Subsystem 145), part of System 140. The description follows the Development Control Requirements of WHC-CM-6-1, EP 2.4, Rev. 3.

Satoh, J.A.

1994-11-09T23:59:59.000Z

24

Radioisotope thermoelectric generator transportation system subsystem 143 software development plan  

SciTech Connect (OSTI)

This plan describes the activities to be performed and the controls to be applied to the process of specifying, developing, and qualifying the data acquisition software for the Radioisotope Thermoelectric Generator (RTG) Transportation System Subsystem 143 Instrumentation and Data Acquisition System (IDAS). This plan will serve as a software quality assurance plan, a verification and validation (V and V) plan, and a configuration management plan.

King, D.A.

1994-11-10T23:59:59.000Z

25

Lessons learned from RTG programs  

SciTech Connect (OSTI)

During the Cassini Radioisotope Thermoelectric Generator (RTG) program, the heritage RTG design was reviewed and modified to incorporate lessons learned. Design changes were made both to resolve problems as they occurred and to correct difficulties noted in earlier missions. Topics addressed in this paper included problems experienced previously at the launch facility in attaching the pressure relief device to the generators, and the open circuit conditions that occurred at times in the resistance temperature device wiring harness. Also discussed is a problem caused by mistakes in software configuration management. How lessons learned refined the RTG design and integration with the spacecraft are discussed and the adopted solutions are described. {copyright} {ital 1998 Lockheed Martin Missles and Space, reproduced with permission.}

Reinstrom, R.M.; Cockfield, R.D. [Lockheed Martin Missiles and Space, P.O. Box 8555, Philadelphia, Pennsylvania 19101 (United States)

1998-01-01T23:59:59.000Z

26

The Industrialization of Thermoelectric Power Generation Technology...  

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

system requirements for high volume power generation with thermoelectrics such desirable thermoelectric properties, low material toxicity, interface compatibility, cost...

27

[Radioisotope thermoelectric generators and ancillary activities]. Monthly technical progress report, 1 April--28 April 1996  

SciTech Connect (OSTI)

Tehnical progress achieved during this period on radioisotope thermoelectric generators is described under the following tasks: engineering support, safety analysis, qualified unicouple fabrication, ETG fabrication/assembly/test, RTG shipping/launch support, design/review/mission applications, and project management/quality assurance/reliability.

NONE

1996-06-01T23:59:59.000Z

28

Superconducting thermoelectric generator  

DOE Patents [OSTI]

An apparatus and method for producing electricity from heat. The present invention is a thermoelectric generator that uses materials with substantially no electrical resistance, often called superconductors, to efficiently convert heat into electrical energy without resistive losses. Preferably, an array of superconducting elements is encased within a second material with a high thermal conductivity. The second material is preferably a semiconductor. Alternatively, the superconducting material can be doped on a base semiconducting material, or the superconducting material and the semiconducting material can exist as alternating, interleaved layers of waferlike materials. A temperature gradient imposed across the boundary of the two materials establishes an electrical potential related to the magnitude of the temperature gradient. The superconducting material carries the resulting electrical current at zero resistivity, thereby eliminating resistive losses. The elimination of resistive losses significantly increases the conversion efficiency of the thermoelectric device.

Metzger, J.D.; El-Genk, M.S.

1996-01-01T23:59:59.000Z

29

Superconducting thermoelectric generator  

DOE Patents [OSTI]

An apparatus and method for producing electricity from heat. The present invention is a thermoelectric generator that uses materials with substantially no electrical resistance, often called superconductors, to efficiently convert heat into electrical energy without resistive losses. Preferably, an array of superconducting elements is encased within a second material with a high thermal conductivity. The second material is preferably a semiconductor. Alternatively, the superconducting material can be doped on a base semiconducting material, or the superconducting material and the semiconducting material can exist as alternating, interleaved layers of waferlike materials. A temperature gradient imposed across the boundary of the two materials establishes an electrical potential related to the magnitude of the temperature gradient. The superconducting material carries the resulting electrical current at zero resistivity, thereby eliminating resistive losses. The elimination of resistive losses significantly increases the conversion efficiency of the thermoelectric device.

Metzger, John D. (Eaton's Neck, NY); El-Genk, Mohamed S. (Albuquerque, NM)

1998-01-01T23:59:59.000Z

30

Superconducting thermoelectric generator  

DOE Patents [OSTI]

An apparatus and method for producing electricity from heat is disclosed. The present invention is a thermoelectric generator that uses materials with substantially no electrical resistance, often called superconductors, to efficiently convert heat into electrical energy without resistive losses. Preferably, an array of superconducting elements is encased within a second material with a high thermal conductivity. The second material is preferably a semiconductor. Alternatively, the superconducting material can be doped on a base semiconducting material, or the superconducting material and the semiconducting material can exist as alternating, interleaved layers of waferlike materials. A temperature gradient imposed across the boundary of the two materials establishes an electrical potential related to the magnitude of the temperature gradient. The superconducting material carries the resulting electrical current at zero resistivity, thereby eliminating resistive losses. The elimination of resistive losses significantly increases the conversion efficiency of the thermoelectric device. 4 figs.

Metzger, J.D.; El-Genk, M.S.

1998-05-05T23:59:59.000Z

31

Advanced Thermoelectric Materials and Generator Technology for...  

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

Thermoelectric Materials and Generator Technology for Automotive Waste Heat at GM Advanced Thermoelectric Materials and Generator Technology for Automotive Waste Heat at GM...

32

Thermoelectric generator for motor vehicle  

DOE Patents [OSTI]

A thermoelectric generator for producing electric power for a motor vehicle from the heat of the exhaust gasses produced by the engine of the motor vehicle. The exhaust gasses pass through a finned heat transfer support structure which has seat positions on its outside surface for the positioning of thermoelectric modules. A good contact cylinder provides a framework from which a spring force can be applied to the thermoelectric modules to hold them in good contact on their seats on the surface of the heat transfer support structure.

Bass, John C. (6121 La Pintra Dr., La Jolla, CA 92037)

1997-04-29T23:59:59.000Z

33

Thermoelectric generator for motor vehicle  

SciTech Connect (OSTI)

A thermoelectric generator is described for producing electric power for a motor vehicle from the heat of the exhaust gases produced by the engine of the motor vehicle. The exhaust gases pass through a finned heat transfer support structure which has seat positions on its outside surface for the positioning of thermoelectric modules. A good contact cylinder provides a framework from which a spring force can be applied to the thermoelectric modules to hold them in good contact on their seats on the surface of the heat transfer support structure. 8 figs.

Bass, J.C.

1997-04-29T23:59:59.000Z

34

Analytical thermal model validation for Cassini radioisotope thermoelectric generator  

SciTech Connect (OSTI)

The Saturn-bound Cassini spacecraft is designed to rely, without precedent, on the waste heat from its three radioisotope thermoelectric generators (RTGs) to warm the propulsion module subsystem, and the RTG end dome temperature is a key determining factor of the amount of waste heat delivered. A previously validated SINDA thermal model of the RTG was the sole guide to understanding its complex thermal behavior, but displayed large discrepancies against some initial thermal development test data. A careful revalidation effort led to significant modifications and adjustments of the model, which result in a doubling of the radiative heat transfer from the heat source support assemblies to the end domes and bring up the end dome and flange temperature predictions to within 2 C of the pertinent test data. The increased inboard end dome temperature has a considerable impact on thermal control of the spacecraft central body. The validation process offers an example of physically-driven analytical model calibration with test data from not only an electrical simulator but also a nuclear-fueled flight unit, and has established the end dome temperatures of a flight RTG where no in-flight or ground-test data existed before.

Lin, E.I. [California Inst. of Tech., Pasadena, CA (United States). Jet Propulsion Lab.

1997-12-31T23:59:59.000Z

35

Thermal Strategies for High Efficiency Thermoelectric Power Generation...  

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

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

36

Manufacture of thermoelectric generator structures by fiber drawing  

DOE Patents [OSTI]

Methods of manufacturing a thermoelectric generator via fiber drawing and corresponding or associated thermoelectric generator devices are provided.

McIntyre, Timothy J; Simpson, John T; West, David L

2014-11-18T23:59:59.000Z

37

Thermal and Electrical Analysis of MARS Rover RTG, and Performance Comparison of Alternative Design Options.  

SciTech Connect (OSTI)

The paper describes the thermal, thermoelectric and electrical analysis of Radioisotope Thermoelectric Generators (RTGs) for powering the MARS Rover vehicle, which is a critical element of the unmanned Mars Rover and Sample Return mission (MRSR). The work described was part of an RTG design study conducted by Fairchild Space Company for the U.S. Department of Energy, in support of the Jet Propulsion Laboratory's MRSR Project.; A companion paper presented at this conference described a reference mission scenario, al illustrative Rover design and activity pattern on Mars, its power system requirements and environmental constraints, a design approach enabling RTG operation in the Martian atmosphere, and the design and the structural and mass analysis of a conservative baseline RTG employing safety-qualified heat source modules and reliability-proven thermoelectric converter elements.; The present paper presents a detailed description of the baseline RTG's thermal, thermoelectric, and electrical analysis. It examines the effect of different operating conditions (beginning versus end of mission, water-cooled versus radiation-cooled, summer day versus winter night) on the RTG's performance. Finally, the paper describes and analyzes a number of alternative RTG designs, to determine the effect of different power levels (250W versus 125W), different thermoelectric element designs (standard versus short unicouples versus multicouples) and different thermoelectric figures of merit (0.00058K(superscript -1) to 0.000140K (superscript -1) on the RTG's specific power.; The results presented show the RTG performance achievable with current technology, and the performance improvements that would be achievable with various technology developments. It provides a basis for selecting the optimum strategy for meeting the Mars Rover design goals with minimal programmatic risk and cost.; There is a duplicate copy and also a duplicate copy in the ESD files.

Schock, Alfred; Or, Chuen T; Skrabek, Emanuel A

1989-09-29T23:59:59.000Z

38

Safety evaluation of RTG launches aboard Titan IV launch vehicles  

SciTech Connect (OSTI)

The analytical tool used to evaluate accidents aboard a Titan IV launch vehicle involving a Radioisotope Thermoelectric Generator (RTG) is discussed. The Launch Accident Scenario Evaluation Program-Titan IV version (LASEP-T) uses a Monte Carlo approach to determine the response of an RTG to various threatening environments. The threatening environments arise from a complex interplay of probabilistic and deterministic processes, and are therefore parameterized by a set of random variables with probability distributions. The assessment of the RTG response to a given environment is based on both empirical data and theoretical modeling. Imbedding detailed, complex response models into the LASEP-T calculation was not practical. Simpler response models have been constructed to capture both the inherent variability due to the phenomenology of the accident scenario along with the uncertainty of predicting response behavior. The treatment of variability and uncertainty as it pertains to the launch accident evaluation of RTG response will be discussed.

Rosko, Robert J.; Loughin, Stephen [Lockheed Martin Missiles and Space P.O. Box 8555 Philadelphia, Pennsylvania 19101 (United States)

1997-01-10T23:59:59.000Z

39

Cassini RTG program. Monthly technical progress report, September 29, 1997--October 26, 1997  

SciTech Connect (OSTI)

This report describes work on the contract to provide Radioisotope Thermoelectric Generators (RTG) and Ancillary Activities in support of the Cassini Spacecraft launch. The craft was successfully launched on October 15, 1997. Early telemetry results show excellent performance from the three launched RTG modules. A major share of this report describes safety analyses for contamination radii in the event of launch failures and generator destruction, as well as launch related activities.

NONE

1997-11-24T23:59:59.000Z

40

Thermoelectric Power Generation System with Loop Thermosyphon...  

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

Power Generation System with Loop Thermosyphon in Future High Efficiency Hybrid Vehicles Thermoelectric Power Generation System with Loop Thermosyphon in Future High Efficiency...

Note: This page contains sample records for the topic "thermoelectric generator rtg" 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

Development of a 100-Watt High Temperature Thermoelectric Generator...  

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

Generator Development of a 100-Watt High Temperature Thermoelectric Generator Test results for low and high temperature thermoelectric generators (TEG) those for a...

42

Design and Structural Analysis of Mars Rover RTG  

SciTech Connect (OSTI)

The paper describes the design and the structural and mass analysis of a Radioisotope Thermoelectric Generators (RTGs) for powering the MARS Rover vehicle, which is a critical element of the unmanned Mars Rover and Sample Return mission (MRSR). The RTG design study was conducted by Fairchild Space Company for the U.S. Department of Energy, in support of the Jet Propulsion Laboratory's MRSR project.; The paper briefly describes a reference mission scenario, an illustrative Rover design and activity pattern on Mars, and its power system requirements and environmental constraints, including the RTG cooling requirements during transit to Mars. It identifies the key RTG design problem, i.e. venting the helium generated by the fuel's alpha decay without intrusion of the Martian atmosphere into the RTG, and proposes a design approach for solving that problem.; Using that approach, it describes a very conservative baseline RTG design. The design is based on the proven and safety-qualified General Purpose Heat Source module, and employs standard thermoelectric unicouples whose reliability and performance stability has been extensively demonstrated on previous space missions. The heat source of the 250-watt RTG consists of a stack of 18 separate modules that is supported at its ends but not along its length. The paper describes and analyzes the structure that holds the stack together during Earth launch and Mars operations but allows it to come apart in case of an inadvertent reentry.; A companion paper presented at this conference describes the RTG's thermal and electrical analysis, and compares its performance with that of several lighter but less conservative design options.; There is a duplicate copy in the ESD files. This document is not relevent to OSTI Library. Do not send.

Schock, Alfred; Hamrick, T.; Sankarankandath, V.; Shirbacheh, M.

1989-09-29T23:59:59.000Z

43

Over-the-road shock and vibration testing of the radioisotope thermoelectric generator transportation system  

SciTech Connect (OSTI)

Radioisotope Thermoelectric Generators (RTG) convert heat generated by radioactive decay into electricity through the use of thermocouples. The RTGs have a long operating life, are reasonably lightweight, and require little or no maintenance, which make them particularly attractive for use in spacecraft. However, because RTGs contain significant quantities of radioactive materials, normally plutonium-238 and its decay products, they must be transported in packages built in accordance with Title 10, Code of Federal Regulations, Part 71 (10 CFR 71). To meet these regulations, a RTG Transportation System (RTGTS) that fully complies with 10 CFR 71 has been developed, which protects RTGs from adverse environmental conditions during normal conditions of transport (e.g., shock, vibration, and heat). To ensure the protection of RTGs from shock and vibration loadings during transport, extensive over-the-road testing was conducted on the RTG`S to obtain real-time recordings of accelerations of the air-ride suspension system trailer floor, packaging, and support structure. This paper provides an overview of the RTG`S, a discussion of the shock and vibration testing, and a comparison of the test results to the specified shock response spectra and power spectral density acceleration criteria.

Becker, D.L.

1997-05-01T23:59:59.000Z

44

Thermoelectric Generator (TEG) Fuel Displacement Potential using...  

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

(TEG) Fuel Displacement Potential using Engine-in-the-Loop and Simulation Thermoelectric Generator (TEG) Fuel Displacement Potential using Engine-in-the-Loop and Simulation...

45

Thermoelectric generator apparatus and operation method  

SciTech Connect (OSTI)

A method of operating a thermoelectric generator includes: cyclically producing increasing then decreasing temperature differences in the thermoelectric material of the generator; and generating a cyclically increasing then decreasing electrical generator output signal, in response to such temperature differences, to transmit electrical power generated by the generator from the generator. Part of the thermoelectric material reaches temperatures substantially above the melting temperature of the material. The thermoelectric material of the generator forms a part of a closed electrical loop about a transformer core so that the inductor voltage for the loop serves as the output signal of the generator. A thermoelectric generator, which can be driven by the described method of operation, incorporates fins into a thermopile to conduct heat toward or away from the alternating spaces between adjacent layers of different types of thermoelectric material. The fins extend from between adjacent layers, so that they can also conduct electrical current between such layers, perpendicularly to the direction of stacking of the layers. The exhaust from an internal combustion engine can be employed to drive the thermoelectric generator, and, also, to act as a driver for a thermoelectric generator in accordance with the method of operation initially described.

Lowther, F.E.

1984-07-31T23:59:59.000Z

46

An overview of the Radioisotope Thermoelectric Generator Transportation System Program  

SciTech Connect (OSTI)

Radioisotope Thermoelectric Generators (RTG) convert the heat generated by radioactive decay to electricity using thermocouples. RTGs have a long operating life, are reasonably lightweight, and require little or no maintenance once assembled and tested. These factors make RTGs particularly attractive for use in spacecraft. However, because RTGs contain significant quantities of radioactive materials, normally plutonium-238 and its decay products, they must be transported in packages built in accordance with Title 10, Code of Federal Regulations, Part 71. The U.S. Department of Energy assigned the Radioisotope Thermoelectric Generator Transportation System (RTGTS) Program to Westinghouse Hanford Company in 1988 to develop a system meeting the regulatory requirements. The program objective was to develop a transportation system that would fully comply with 10 CFR 71 while protecting RTGs from adverse environmental conditions during normal conditions of transport (e.g., shock and heat). The RTGTS is scheduled for completion in December 1996 and will be available to support the National Aeronautics and Space Administration{close_quote}s Cassini mission to Saturn in October 1997. This paper provides an overview of the RTGTS and discusses the hardware being produced. Additionally, various program management innovations mandated by recent major changes in the U.S. Department of Energy structure and resources will be outlined. {copyright} {ital 1996 American Institute of Physics.}

McCoy, J.C.; Becker, D.L. [Westinghouse Hanford Company, P.O. Box 1970, Richland, Washington 99352 (United States)

1996-03-01T23:59:59.000Z

47

An overview of the Radioisotope Thermoelectric Generator Transporation System Program  

SciTech Connect (OSTI)

Radioisotope Thermoelectric Generators (RTG) convert the heat generated by radioactive decay to electricity using thermocouples. RTGs have a long operating life, are reasonably lightweight, and require little or no maintenance once assembled and tested. These factors make RTGs particularly attractive for use in spacecraft However, because RTGs contain significant quantities of radioactive materials, normally plutonium-238 and its decay products, they must be transported in packages built in accordance with Title 10, Code of Federal Regulations, Part 71. The US Department of Energy assigned the Radioisotope Thermoelectric Generator Transportation System (RTGTS) Program to Westinghouse Hanford Company in 1988 to develop a system meeting the regulatory requirements. The program objective was to develop a transportation system that would fully comply with 10 CFR 71 while protecting RTGs from adverse environmental conditions during normal conditions of transport (e.g., shock and heat). The RTGTS is scheduled for completion in December 1996 and will be available to support the National Aeronautics and Space Administrations Cassini mission to Saturn in October 1997. This paper provides an overview of the RTGTS and discusses the hardware being produced. Additionally, various program management innovations mandated by recent ma or changes in the US Department of Energy structure and resources will be outlined.

McCoy, J.C.

1995-10-01T23:59:59.000Z

48

High Reliability, High TemperatureThermoelectric Power Generation...  

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

Reliability, High TemperatureThermoelectric Power Generation Materials and Technologies High Reliability, High TemperatureThermoelectric Power Generation Materials and Technologies...

49

Overview of Thermoelectric Power Generation Technologies in Japan...  

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

of Thermoelectric Power Generation Technologies in Japan Discusses thermoelectric power generation technologies as applied to waste heat recovery, renewable thermal energy...

50

Cost-Competitive Advanced Thermoelectric Generators for Direct...  

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

Advanced Thermoelectric Generators for Direct Conversion of Vehicle Waste Heat into Useful Electrical Power Cost-Competitive Advanced Thermoelectric Generators for...

51

Status of Segmented Element Thermoelectric Generator for Vehicle...  

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

Segmented Element Thermoelectric Generator for Vehicle Waste Heat Recovery Status of Segmented Element Thermoelectric Generator for Vehicle Waste Heat Recovery Discusses progress...

52

Establishing Thermo-Electric Generator (TEG) Design Targets for...  

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

of Cost-Competitive Advanced Thermoelectric Generators for Direct Conversion of Vehicle Waste Heat into Useful Electrical Power Automotive Thermoelectric Generators and HVAC...

53

Low and high Temperature Dual Thermoelectric Generation Waste...  

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

Low and high Temperature Dual Thermoelectric Generation Waste Heat Recovery System for Light-Duty Vehicles Low and high Temperature Dual Thermoelectric Generation Waste Heat...

54

Multi-physics modeling of thermoelectric generators for waste...  

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

Multi-physics modeling of thermoelectric generators for waste heat recovery applications Multi-physics modeling of thermoelectric generators for waste heat recovery applications...

55

Overview of Progress in Thermoelectric Power Generation Technologies...  

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

Progress in Thermoelectric Power Generation Technologies in Japan Overview of Progress in Thermoelectric Power Generation Technologies in Japan Presents progress in government- and...

56

Feasibility of OnBoard Thermoelectric Generation for Improved...  

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

OnBoard Thermoelectric Generation for Improved Vehicle Fuel Economy Feasibility of OnBoard Thermoelectric Generation for Improved Vehicle Fuel Economy Poster presentation at the...

57

Catalytic converter with thermoelectric generator  

SciTech Connect (OSTI)

The unique design of an electrically heated catalyst (EHC) and the inclusion of an ECO valve in the exhaust of an internal combustion engine will meet the strict new emission requirements, especially at vehicle cold start, adopted by several states in this country as well as in Europe and Japan. The catalytic converter (CC) has been a most useful tool in pollution abatement for the automobile. But the emission requirements are becoming more stringent and, along with other improvements, the CC must be improved to meet these new standards. Coupled with the ECO valve, the EHC can meet these new emission limits. In an internal combustion engine vehicle (ICEV), approximately 80% of the energy consumed leaves the vehicle as waste heat: out the tail pipe, through the radiator, or convected/radiated off the engine. Included with the waste heat out the tail pipe are the products of combustion which must meet strict emission requirements. The design of a new CC is presented here. This is an automobile CC that has the capability of producing electrical power and reducing the quantity of emissions at vehicle cold start, the Thermoelectric Catalytic Power Generator. The CC utilizes the energy of the exothermic reactions that take place in the catalysis substrate to produce electrical energy with a thermoelectric generator. On vehicle cold start, the thermoelectric generator is used as a heat pump to heat the catalyst substrate to reduce the time to catalyst light-off. Thus an electrically heated catalyst (EHC) will be used to augment the abatement of tail pipe emissions. Included with the EHC in the exhaust stream of the automobile is the ECO valve. This valve restricts the flow of pollutants out the tail pipe of the vehicle for a specified amount of time until the EHC comes up to operating temperature. Then the ECO valve opens and allows the full exhaust, now treated by the EHC, to leave the vehicle.

Parise, R.J.

1998-07-01T23:59:59.000Z

58

Improvements to solar thermoelectric generators through device design  

E-Print Network [OSTI]

A solar thermoelectric generator (STEG) is a device which converts sunlight into electricity through the thermoelectric effect. A STEG is nominally formed when a thermoelectric generator (TEG), a type of solid state heat ...

Weinstein, Lee A. (Lee Adragon)

2013-01-01T23:59:59.000Z

59

Quality Assurance Plan for Heat Source/Radioisotope Thermoelectric Generator Programs  

SciTech Connect (OSTI)

The purpose of this document is to serve as the Quality Assurance Plan for Heat Source/Radioisotope Thermoelectric Generator (HS/RTG) programs performed at EG&G Mound Applied Technologies. As such, it identifies and describes the systems and activities in place to support the requirements contained in DOE Order 5700.6C as reflected in MD-10334, Mound Quality Policy and Responsibilities and the DOE/RPSD supplement, OSA/PQAR-1, Programmatic Quality Assurance Requirements for Space and Terrestrial Nuclear Power Systems. Unique program requirements, including additions, modifications, and exceptions to these quality requirements, are contained in the appendices of this plan. Additional appendices will be added as new programs and activities are added to Mound's HS/RTG mission assignment.

Gabriel, D. M.; Miller, G. D.; Bohne, W. A.

1995-03-16T23:59:59.000Z

60

General-purpose heat source: Research and development program, radioisotope thermoelectric generator/thin fragment impact test  

SciTech Connect (OSTI)

The general-purpose heat source provides power for space missions by transmitting the heat of {sup 238}Pu decay to an array of thermoelectric elements in a radioisotope thermoelectric generator (RTG). Because the potential for a launch abort or return from orbit exists for any space mission, the heat source response to credible accident scenarios is being evaluated. This test was designed to provide information on the response of a loaded RTG to impact by a fragment similar to the type of fragment produced by breakup of the spacecraft propulsion module system. The results of this test indicated that impact by a thin aluminum fragment traveling at 306 m/s may result in significant damage to the converter housing, failure of one fueled clad, and release of a small quantity of fuel.

Reimus, M.A.H.; Hinckley, J.E.

1996-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermoelectric generator rtg" 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

Radioisotope Thermoelectric Generator Transportation System licensed hardware second certification test series and package shock mount system test  

SciTech Connect (OSTI)

This paper presents a summary of two separate drop test activities that were performed in support of the Radioisotope Thermoelectric Generator (RTG) Transportation System (RTGTS). The first portion of this paper presents the second series of drop testing required to demonstrate that the RTG package design meets the requirements of {ital Title} 10, {ital Code} {ital of} {ital Federal} {ital Regulations}, {open_quote}{open_quote}Part 71{close_quote}{close_quote} (10 CFR 71). Results of the first test series, performed in July 1994, demonstrated that some design changes were necessary. The package design was modified to improve test performance and the design changes were incorporated into the Safety Analysis Report for Packaging (SARP). The second full-size certification test article (CTA-2) incorporated the modified design and was tested at the U.S. Department of Energy{close_quote}s (DOE) Hanford Site near Richland, Washington. With the successful completion of the test series, and pending DOE Office of Facility Safety Analysis approval of the SARP, a certificate of compliance will be issued for the RTG package allowing its use. The second portion of this paper presents the design and testing of the RTG Package Mount System. The RTG package mount was designed to protect the RTG from excessive vibration during transport, provide shock protection during on/off loading, and provide a mechanism for moving the RTG package with a forklift. Military Standard (MIL-STD) 810E, {ital Transit} {ital Drop} {ital Procedure} (DOE 1989), was used to verify that the shock limiting system limited accelerations in excess of 15 G{close_quote}s at frequencies below 150 Hz. Results of the package mount drop tests indicate that an impact force of 15 G{close_quote}s was not exceeded in any test from a free drop height of 457 mm (18 in.). {copyright} {ital 1996 American Institute of Physics.}

Ferrell, P.C.; Moody, D.A. [Westinghouse Hanford Company, P.O. Box 1970, Richland, Washington 99352 (United States)

1996-03-01T23:59:59.000Z

62

Radioisotope Thermoelectric Generator Transporation System licensed hardware second certification test series and package shock mount system test  

SciTech Connect (OSTI)

This paper presents a summary of two separate drop test a e performed in support of the Radioisotope Thermoelectric Generator (RTG) Transportation System (RTGTS). The first portion of this paper presents the second series of drop testing required to demonstrate that the RTG package design meets the requirements of Title 10, Code of Federal Regulations, ``Part 71`` (10 CFR 71). Results of the first test series, performed in July 1994, demonstrated that some design changes were necessary. The package design was modified to improve test performance and the design changes were incorporated into the Safety Analysis Report for Packaging (SARP). The second full-size certification test article (CTA-2) incorporated the modified design and was tested at the US Department of Energy`s (DOE) Hanford Site near Richland, Washington. With the successful completion of the test series, and pending DOE Office of Facility Safety Analysis approval of the SARP, a certificate of compliance will be issued for the RTG package allowing its use. The second portion of this paper presents the design and testing of the RTG Package Mount System. The RTG package mount was designed to protect the RTG from excessive vibration during transport, provide shock protection during on/off loading, and provide a mechanism for moving the RTG package with a forklift. Military Standard (MIL-STD) 810E, Transit Drop Procedure (DOE 1989), was used to verify that the shock limiting system limited accelerations in excess of 15 G`s at frequencies below 150 Hz. Results of the package mount drop tests indicate that an impact force of 15 G`s was not exceeded in any test from a free drop height of 457 mm (18 in.).

Ferrell, P.C.; Moody, D.A.

1995-10-01T23:59:59.000Z

63

Modular Isotopic Thermoelectric Generator (MITG) Design and Development, Part A-E. Original was presented at 1983 Intersociety Energy Conversion Engineering Conference (IECEC)  

SciTech Connect (OSTI)

Advanced RTG concepts utilizing improved thermoelectric materials and converter concepts are under study at Fairchild for DOE. The design described here is based on DOE's newly developed radioisotope heat source, and on an improved silicon-germanium material and a multicouple converter module under development at Syncal. Fairchild's assignment was to combine the above into an attractive power system for use in space, and to assess the specific power and other attributes of that design. The resultant design is highly modular, consisting of standard RTG slices, each producing 24 watts at the desired output voltage of 28 volt. Thus, the design could be adapted to various space missions over a wide range of power levels, with little or no redesign. Each RTG slice consists of a 250-watt heat source module, eight multicouple thermoelectric modules, and standard sections of insulator, housing, radiator fins, and electrical circuit. The design makes it possible to check each thermoelectric module for electrical performance, thermal contact, leaktightness, and performance stability, after the generator is fully assembled; and to replace any deficient modules without disassembling the generator or perturbing the others. The RTG end sections provide the spring-loaded supports required to hold the free-standing heat source stack together during launch vibration. Detailed analysis indicates that the present generation of RTGs, using the same heat source modules. There is a duplicate copy of this document. OSTI has a copy of this paper.

Schock, A.

1983-04-29T23:59:59.000Z

64

Development of Cost-Competitive Advanced Thermoelectric Generators...  

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

Advanced Thermoelectric Generators for Direct Conversion of Vehicle Waste Heat into Useful Electrical Power Development of Cost-Competitive Advanced Thermoelectric...

65

Analysis of a novel thermoelectric generator in the built environment.  

E-Print Network [OSTI]

??This study centered on a novel thermoelectric generator (TEG) integrated into the built environment. Designed by Watts Thermoelectric LLC, the TEG is essentially a novel… (more)

Lozano, Adolfo

2011-01-01T23:59:59.000Z

66

Modeling of concentrating solar thermoelectric generators  

E-Print Network [OSTI]

The conversion of solar power into electricity is dominated by non-concentrating photovoltaics and concentrating solar thermal systems. Recently, it has been shown that solar thermoelectric generators (STEGs) are a viable ...

Ren, Zhifeng

67

Solar thermoelectrics for small scale power generation  

E-Print Network [OSTI]

In the past two decades, there has been a surge in the research of new thermoelectric (TE) materials, driven party by the need for clean and sustainable power generation technology. Utilizing the Seebeck effect, the ...

Amatya, Reja

2012-01-01T23:59:59.000Z

68

Thermoelectric power generator with intermediate loop  

DOE Patents [OSTI]

A thermoelectric power generator is disclosed for use to generate electrical power from heat, typically waste heat. An intermediate heat transfer loop forms a part of the system to permit added control and adjustability in the system. This allows the thermoelectric power generator to more effectively and efficiently generate power in the face of dynamically varying temperatures and heat flux conditions, such as where the heat source is the exhaust of an automobile, or any other heat source with dynamic temperature and heat flux conditions.

Bell, Lon E; Crane, Douglas Todd

2013-05-21T23:59:59.000Z

69

Thermoelectric power generator with intermediate loop  

DOE Patents [OSTI]

A thermoelectric power generator is disclosed for use to generate electrical power from heat, typically waste heat. An intermediate heat transfer loop forms a part of the system to permit added control and adjustability in the system. This allows the thermoelectric power generator to more effectively and efficiently generate power in the face of dynamically varying temperatures and heat flux conditions, such as where the heat source is the exhaust of an automobile, or any other heat source with dynamic temperature and heat flux conditions.

Bel,; Lon E. (Altadena, CA); Crane, Douglas Todd (Pasadena, CA)

2009-10-27T23:59:59.000Z

70

Design and Optimization of Compatible, Segmented Thermoelectric Generators  

E-Print Network [OSTI]

to rationally select materials for a segmented thermoelectric generator. The thermoelectric potential is used for the exact analytic expressions for materials with temperature dependent thermoelectric properties C H T T = . The thermoelectric material governs how close the efficiency can be to Carnot primarily

71

Modeling of solar thermal selective surfaces and thermoelectric generators  

E-Print Network [OSTI]

A thermoelectric generator is a solid-state device that converts a heat flux into electrical power via the Seebeck effect. When a thermoelectric generator is inserted between a solar-absorbing surface and a heat sink, a ...

McEnaney, Kenneth

2010-01-01T23:59:59.000Z

72

Method of operating a thermoelectric generator  

DOE Patents [OSTI]

A method for operating a thermoelectric generator supplying a variable-load component includes commanding the variable-load component to operate at a first output and determining a first load current and a first load voltage to the variable-load component while operating at the commanded first output. The method also includes commanding the variable-load component to operate at a second output and determining a second load current and a second load voltage to the variable-load component while operating at the commanded second output. The method includes calculating a maximum power output of the thermoelectric generator from the determined first load current and voltage and the determined second load current and voltage, and commanding the variable-load component to operate at a third output. The commanded third output is configured to draw the calculated maximum power output from the thermoelectric generator.

Reynolds, Michael G; Cowgill, Joshua D

2013-11-05T23:59:59.000Z

73

Overview of Thermoelectric Power Generation Technologies in Japan  

Broader source: Energy.gov [DOE]

Discusses thermoelectric power generation technologies as applied to waste heat recovery, renewable thermal energy sources, and energy harvesting

74

Titanium nitride electrodes for thermoelectric generators  

DOE Patents [OSTI]

The invention is directed to a composite article suitable for use in thermoelectric generators. The article comprises a thin film of titanium nitride as an electrode deposited onto solid electrolyte. The invention is also directed to the method of making same.

Novak, Robert F. (Farmington Hills, MI); Schmatz, Duane J. (Dearborn Heights, MI); Hunt, Thomas K. (Ann Arbor, MI)

1987-12-22T23:59:59.000Z

75

Molybdenum oxide electrodes for thermoelectric generators  

DOE Patents [OSTI]

The invention is directed to a composite article suitable for use in thermoelectric generators. The article comprises a thin film comprising molybdenum oxide as an electrode deposited by physical deposition techniques onto solid electrolyte. The invention is also directed to the method of making same.

Schmatz, Duane J. (Dearborn Heights, MI)

1989-01-01T23:59:59.000Z

76

ENERGY PAYBACK OPTIMIZATION OF THERMOELECTRIC POWER GENERATOR SYSTEMS  

E-Print Network [OSTI]

and the thermoelectric module should be performed. Active cooling and the design of the heat sink are customized to findENERGY PAYBACK OPTIMIZATION OF THERMOELECTRIC POWER GENERATOR SYSTEMS Kazuaki Yazawa Dept model for optimizing thermoelectric power generation system is developed and utilized for parametric

77

A prototype on-line work procedure system for radioisotope thermoelectric generator production  

SciTech Connect (OSTI)

An on-line system to manage work procedures is being developed to support radioisotope thermoelectric generator (RTG) assembly and testing in a new production facility. This system implements production work procedures as interactive electronic documents executed at the work site with no intermediate printed form. It provides good control of the creation and application of work procedures and provides active assistance to the worker in performing them and in documenting the results. An extensive prototype of this system is being evaluated to ensure that it will have all the necessary features and that it will fit the user's needs and expectations. This effort has involved the Radioisotope Power Systems Facility (RPSF) operations organization and technology transfer between Westinghouse Hanford Company (Westinghouse Hanford) and EG G Mound Applied Technologies Inc. (Mound) at the US Department of Energy (DOE) Mound Site. 1 ref.

Kiebel, G.R.

1991-09-01T23:59:59.000Z

78

Compatibility issues of potential payloads for the USA/9904/B(U)F-85 RTG transportation system (RTGTS) for the 'Pluto Express' mission  

SciTech Connect (OSTI)

The specific electric power system for the 'Pluto Express' mission has yet to be specified. However, electric power will be provided by either radioisotopic thermoelectric generators (RTG), radioisotope thermophotovoltaic systems (RTPV), alkali metal thermal to electrical conversion (AMTEC) systems, radioisotope Stirling systems, or a combination of these. The selected radioisotopic power system will also be transported using the USA/9904/B(U)F-85, Radioisotope Thermoelectric Generator (RTG) Transportation System (RTGTS). As a result, all of the potential payloads present uniquely different environmental and physical configuration requirements. This paper presents the major compatibility issues of the potential payloads for the USA/9904/B(U)F-85 RTG Transportation System for the 'Pluto Express' mission.

Miller, Roger G.; Barklay, Chadwick D.; Howell, Edwin I.; Frazier, Timothy A. [EG and G Mound Applied Technologies P.O. Box 3000 Miamisburg, Ohio 45343-3000 (United States); U.S. Department of Energy P.O. Box 66 Miamisburg, Ohio 45343-0066 (United States)

1997-01-10T23:59:59.000Z

79

Design and development of thermoelectric generator  

SciTech Connect (OSTI)

In this paper we discuss the fabrication, working and characteristics of a thermoelectric generator made up of p and n type semiconductor materials. The device consists of Fe{sub 0.2}Co{sub 3.8}Sb{sub 11.5}Te{sub 0.5} (zT = 1.04 at 818 K) as the n-type and Zn4Sb3 (zT=0.8 at 550 K) as the p-type material synthesized by vacuum hot press method. Carbon paste has been used to join the semiconductor legs to metal (Molybdenum) electrodes to reduce the contact resistance. The multi-couple (4 legs) generator results a maximum output power of 1.083 mW at a temperature difference of 240 K between the hot and cold sides. In this investigation, an I-V characteristic, maximum output power of the thermoelectric module is presented. The efficiency of thermoelectric module is obtained as ? = 0.273 %.

Prem Kumar, D. S., E-mail: rcmallik@physics.iisc.ernet.in; Mahajan, Ishan Vardhan, E-mail: rcmallik@physics.iisc.ernet.in; Anbalagan, R., E-mail: rcmallik@physics.iisc.ernet.in; Mallik, Ramesh Chandra, E-mail: rcmallik@physics.iisc.ernet.in [Thermoelectric Materials and Devices Laboratory, Department of Physics, Indian Institute of Science, Bangalore-560012 (India)

2014-04-24T23:59:59.000Z

80

Development of a 500 Watt High Temperature Thermoelectric Generator...  

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

More Documents & Publications Development of a 100-Watt High Temperature Thermoelectric Generator Automotive Waste Heat Conversion to Power Program Automotive Waste Heat...

Note: This page contains sample records for the topic "thermoelectric generator rtg" 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

Thermoelectric Generators for Automotive Waste Heat Recovery Systems Part II: Parametric Evaluation  

E-Print Network [OSTI]

Thermoelectric Generators for Automotive Waste Heat Recovery Systems Part II: Parametric Evaluation been proposed to model thermoelectric generators (TEGs) for automotive waste heat recovery. Details: Thermoelectric generators, waste heat recovery, automotive exhaust, skutterudites INTRODUCTION In part I

Xu, Xianfan

82

The Effects of an Exhaust Thermoelectric Generator of a GM Sierra...  

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

an Exhaust Thermoelectric Generator of a GM Sierra Pickup Truck The Effects of an Exhaust Thermoelectric Generator of a GM Sierra Pickup Truck 2004 Diesel Engine Emissions...

83

Thermoelectric Generators for Automotive Waste Heat Recovery Systems Part I: Numerical Modeling  

E-Print Network [OSTI]

Thermoelectric Generators for Automotive Waste Heat Recovery Systems Part I: Numerical Modeling telluride TEMs. Key words: Thermoelectric generators, waste heat recovery, automotive exhaust, skutterudites bismuth telluride are considered for thermoelectric modules (TEMs) for conversion of waste heat from

Xu, Xianfan

84

Microscreen radiation shield for thermoelectric generator  

DOE Patents [OSTI]

The present invention provides a microscreen radiation shield which reduces radiative heat losses in thermoelectric generators such as sodium heat engines without reducing the efficiency of operation of such devices. The radiation shield is adapted to be interposed between a reaction zone and a means for condensing an alkali metal vapor in a thermoelectric generator for converting heat energy directly to electrical energy. The radiation shield acts to reflect infrared radiation emanating from the reaction zone back toward the reaction zone while permitting the passage of the alkali metal vapor to the condensing means. The radiation shield includes a woven wire mesh screen or a metal foil having a plurality of orifices formed therein. The orifices in the foil and the spacing between the wires in the mesh is such that radiant heat is reflected back toward the reaction zone in the interior of the generator, while the much smaller diameter alkali metal atoms such as sodium pass directly through the orifices or along the metal surfaces of the shield and through the orifices with little or no impedance.

Hunt, Thomas K. (Ann Arbor, MI); Novak, Robert F. (Farmington Hills, MI); McBride, James R. (Ypsilanti, MI)

1990-01-01T23:59:59.000Z

85

Disposition of Radioisotope Thermoelectric Generators Currently Located at the Oak Ridge National Laboratory - 12232  

SciTech Connect (OSTI)

Under the American Recovery and Reinvestment Act (ARRA), the U.S. Department of Energy (DOE) awarded SEC Federal Services Corporation (SEC) a 34-building demolition and disposal (D and D) project at the Oak Ridge National Laboratory (ORNL) that included the disposition of six Strontium (Sr-90) powered Radioisotope Thermoelectric Generators (RTGs) stored outside of ORNL Building 3517. Disposition of the RTGs is very complex both in terms of complying with disposal facility waste acceptance criteria (WAC) and U.S. Department of Transportation (DOT) requirements for packaging and transportation in commerce. Two of the RTGs contain elemental mercury which requires them to be Land Disposal Restrictions (LDR) compliant prior to disposal. In addition, all of the RTGs exceed the Class C waste concentration limits under Nuclear Regulatory Commission (NRC) Waste Classification Guidelines. In order to meet the LDR requirements and Nevada National Security Site (NNSS) WAC, a site specific treatability variance for mercury was submitted to the U.S. Environmental Protection Agency (EPA) to allow macro-encapsulation to be an acceptable treatment standard for elemental mercury. By identifying and confirming the design configuration of the mercury containing RTGs, the SEC team proved that the current configuration met the macro-encapsulation standard of 40 Code of Federal Regulations (CFR) 268.45. The SEC Team also worked with NNSS to demonstrate that all radioisotope considerations are compliant with the NNSS low-level waste (LLW) disposal facility performance assessment and WAC. Lastly, the SEC team determined that the GE2000 Type B cask met the necessary size, weight, and thermal loading requirements for five of the six RTGs. The sixth RTG (BUP-500) required a one-time DOT shipment exemption request due to the RTG's large size. The DOT exemption justification for the BUP-500 relies on the inherent robust construction and material make-up of the BUP- 500 RTG. DOE-ORO, SEC, and the entire SEC RTG team are nearing the conclusion of the Sr-90 RTG disposition challenge - a legacy now 50 years in the making. Over 600,000 Ci of Sr-90 waste await disposal and its removal from ORNL will mark an historical moment in the clean-up of the cold-war legacy in the ORNL central industrial area. Elimination (i.e., removal) of the RTGs will reduce security risks at ORNL and disposal will permanently eliminate security risks. The RTGs will eventually decay to benign levels within a reasonable timeframe relative to radiological risks posed by long-lived isotopes. The safety authorization basis at ORNL Building 3517 will be reduced enabling greater operational flexibility in future clean-out and D and D campaigns. Upon disposition the Department of Energy will realize reduced direct and indirect surveillance and maintenance costs that can be reapplied to accelerated and enhanced clean-up of the Oak Ridge Reservation. At present, waste profiles for the RTGs are developed and under review by NNSS RWAP staff and approval authorities. Disposition schedule is driven by the availability of compliant shipping casks necessary to safely transport the RTGs from ORNL to NNSS. The first disposal of the RCA RTG is expected in April 2012 and the remaining RTGs disposed in 2012 and 2013. (authors)

Glenn, J. [U.S. Department of Energy, Oak Ridge Operations Office, 200 Administrative Road, Oak Ridge, TN 37830 (United States); Patterson, J.; DeRoos, K. [SEC Federal Services Corporation (SEC), 2800 Solway Road, Knoxville, TN 37931 (United States); Patterson, J.E.; Mitchell, K.G. [Strata-G, LLC, 2027 Castaic Lane, Knoxville, TN 37932 (United States)

2012-07-01T23:59:59.000Z

86

Compatibility issues of potential payloads for the USA/9904/B(U)F-85 RTG transportation system (RTGTS) for the {open_quotes}Pluto Express{close_quotes} mission  

SciTech Connect (OSTI)

The specific electric power system for the {open_quotes}Pluto Express{close_quotes} mission has yet to be specified. However, electric power will be provided by either radioisotopic thermoelectric generators (RTG), radioisotope thermophotovoltaic systems (RTPV), alkali metal thermal to electrical conversion (AMTEC) systems, radioisotope Stirling systems, or a combination of these. The selected radioisotopic power system will also be transported using the USA/9904/B(U)F-85, Radioisotope Thermoelectric Generator (RTG) Transportation System (RTGTS). As a result, all of the potential payloads present uniquely different environmental and physical configuration requirements. This paper presents the major compatibility issues of the potential payloads for the USA/9904/B(U)F-85 RTG Transportation System for the {open_quotes}Pluto Express{close_quotes} mission. {copyright} {ital 1997 American Institute of Physics.}

Miller, R.G.; Barklay, C.D.; Howell, E.I. [EGG Mound Applied Technologies P.O. Box 3000 Miamisburg, Ohio45343-3000 (United States); Frazier, T.A. [U.S. Department of Energy P.O. Box 66 Miamisburg, Ohio45343-0066 (United States)

1997-01-01T23:59:59.000Z

87

Radiation Environments and Exposure Considerations for the Multi-Mission Radioisotope Thermoelectric Generator  

SciTech Connect (OSTI)

The Multi-Mission Radioisotope Thermoelectric Generator (MMRTG) is the next generation (RTG) being developed by DOE to provide reliable, long-life electric power for NASA's planetary exploration programs. The MMRTG is being developed by Pratt and Whitney Rocketdyne and Teledyne Energy Systems Incorporated (TESI) for use on currently planned and projected flyby, orbital and planet landing missions. This is a significant departure from the design philosophy of the past which was to match specific mission requirements to RTG design capabilities. Undefined mission requirements provide a challenge to system designers by forcing them to put a design envelope around 'all possible missions'. These multi-mission requirements include internal and external radiation sources. Internal sources include the particles ejected by decaying Pu-238 and its daughters plus particles resulting from the interaction of these particles with other MMRTG materials. External sources include the full spectrum of charged particle radiation surrounding planets with magnetic fields and the surfaces of extraterrestrial objects not shielded by magnetic fields. The paper presents the results of investigations into the environments outlined above and the impact of radiation exposure on potential materials to be used on MMRTG and ground support personnel. Mission requirements were also reviewed to evaluate total integrated dose and to project potential shielding requirements for materials. Much of the information on mission shielding requirements was provided by NASA's Jet Propulsion Laboratory. The primary result is an ionizing radiation design curve which indicates the limits to which a particular mission can take the MMRTG in terms of ionizing radiation exposure. Estimates of personnel radiation exposure during ground handling are also provided.

Kelly, William M.; Low, Nora M.; Zillmer, Andrew; Johnson, Gregory A. [Pratt and Whitney Rocketdyne, 6633 Canoga Avenue, Canoga Park, CA 91309 (United States); Normand, Eugene [Boeing Radiation Effects Laboratory, P.O. Box 3707, M/S 2T-50, Seattle, WA 98124-22079 (United States)

2006-01-20T23:59:59.000Z

88

Modeling of thin-film solar thermoelectric generators  

E-Print Network [OSTI]

Recent advances in solar thermoelectric generator (STEG) performance have raised their prospect as a potential technology to convert solar energy into electricity. This paper presents an analysis of thin-film STEGs. ...

Weinstein, Lee Adragon

89

Fiber optic signal amplifier using thermoelectric power generation  

DOE Patents [OSTI]

A remote fiber optic signal amplifier for use as a repeater/amplifier, such as in transoceanic communication, powered by a Pu{sub 238} or Sr{sub 90} thermoelectric generator. The amplifier comprises a unit with connections on the receiving and sending sides of the communications system, and an erbium-doped fiber amplifier connecting each sending fiber to each receiving fiber. The thermoelectric generator, preferably a Pu{sub 238} or Sr{sub 90} thermoelectric generator delivers power to the amplifiers through a regulator. The heat exchange surfaces of the thermoelectric generator are made of material resistant to corrosion and biological growth and are directly exposed to the outside, such as the ocean water in transoceanic communications.

Hart, M.M.

1993-01-01T23:59:59.000Z

90

Fiber optic signal amplifier using thermoelectric power generation  

DOE Patents [OSTI]

A remote fiber optic signal amplifier for use as a repeater/amplifier, such as in transoceanic communications, powered by a Pu{sub 238} or Sr{sub 90} thermoelectric generator. The amplifier comprises a unit with connections on the receiving and sending sides of the communications system, and an erbium-doped fiber amplifier connecting each sending fiber to each receiving fiber. The thermoelectric generator, preferably a Pu{sub 238} or Sr{sub 90} thermoelectric generator delivers power to the amplifiers through a regulator. The heat exchange surfaces of the thermoelectric generator are made of materials resistant to corrosion and biological growth and are directly exposed to the outside, such as the ocean water in transoceanic communications. 2 figs.

Hart, M.M.

1995-04-18T23:59:59.000Z

91

Fiber optic signal amplifier using thermoelectric power generation  

DOE Patents [OSTI]

A remote fiber optic signal amplifier for use as a repeater/amplifier, such as in transoceanic communications, powered by a Pu.sub.238 or Sr.sub.90 thermoelectric generator. The amplifier comprises a unit with connections on the receiving and sending sides of the communications system, and an erbium-doped fiber amplifier connecting each sending fiber to each receiving fiber. The thermoelectric generator, preferably a Pu.sub.238 or Sr.sub.90 thermoelectric generator delivers power to the amplifiers through a regulator. The heat exchange surfaces of the thermoelectric generator are made of materials resistant to corrosion and biological growth and are directly exposed to the outside, such as the ocean water in transoceanic communications.

Hart, Mark M. (Aiken, SC)

1995-01-01T23:59:59.000Z

92

High-density thermoelectric power generation and nanoscale thermal metrology  

E-Print Network [OSTI]

Thermoelectric power generation has been around for over 50 years but has seen very little large scale implementation due to the inherently low efficiencies and powers available from known materials. Recent material advances ...

Mayer, Peter (Peter Matthew), 1978-

2007-01-01T23:59:59.000Z

93

Experimental and theoretical analysis of a thermoelectric generator  

SciTech Connect (OSTI)

The primary objectives of this study were to develop models for studying performance of a thermoelectric generator for the case of steady-state, and transient problems; and to develop a method and procedure for analyzing data taken experimentally and compare them with the theoretical results. The work is divided into primary areas that involve (i) model development and linear and nonlinear parameter estimations, (ii) experimental tests, and (iii) design and simulation. Analysis and experiments were conducted to describe the effects of the leg-surface heat loss, and the temperature difference on the performance of a thermoelectric generator. Two numerical models that treat the problem of thermoelectric generator, linear and nonlinear were developed. A Global Corporation model 5120, 120-watt thermoelectric generator system was tested in the 5-kW NMSU/PSL solar furnace at two different hot and cold junction temperatures. The developed computer models were used for design and simulation of an auto thermoelectric generator (Automobile Thermoelectric Generator) that converts waste heat from the car engine directly to the electrical power as a substitute device for the electrical generator used in cars.

Moghaddas, M.H.

1986-01-01T23:59:59.000Z

94

Thermoelectric generator and method for the fabrication thereof  

DOE Patents [OSTI]

A thermoelectric generator using semiconductor elements for responding to a temperature gradient to produce electrical energy with all of the semiconductor elements being of the same type is disclosed. A continuous process for forming substrates on which the semiconductor elements and superstrates are deposited and a process for forming the semiconductor elements on the substrates are also disclosed. The substrates with the semiconductor elements thereon are combined with superstrates to form modules for use thermoelectric generators.

Benson, David K. (Golden, CO); Tracy, C. Edwin (Golden, CO)

1987-01-01T23:59:59.000Z

95

Thermoelectric generator and method for the fabrication thereof  

DOE Patents [OSTI]

A thermoelectric generator using semiconductor elements for responding to a temperature gradient to produce electrical energy with all of the semiconductor elements being of the same type is disclosed. A continuous process for forming substrates on which the semiconductor elements and superstrates are deposited and a process for forming the semiconductor elements on the substrates are also disclosed. The substrates with the semiconductor elements thereon are combined with superstrates to form modules for use as thermoelectric generators.

Benson, D.K.; Tracy, C.E.

1984-08-01T23:59:59.000Z

96

Heat transfer in a thermoelectric generator for diesel engines  

SciTech Connect (OSTI)

This paper discusses the design and test results obtained for a 1kW thermoelectric generator used to convert the waste thermal energy in the exhaust of a Diesel engine directly to electric energy. The paper focuses on the heat transfer within the generator and shows what had to be done to overcome the heat transfer problems encountered in the initial generator testing to achieve the output goal of 1kW electrical. The 1kW generator uses Bismuth-Telluride thermoelectric modules for the energy conversion process. These modules are also being evaluated for other waste heat applications. Some of these applications are briefly addressed.

Bass, J.C. [Hi-Z Technology, Inc., San Diego, CA (United States)

1995-12-31T23:59:59.000Z

97

A shielded storage and processing facility for radioisotope thermoelectric generator heat source production  

SciTech Connect (OSTI)

A shielded storage rack has been installed as part of the Radioisotope Power Systems Facility (RPSF) at the U.S. Department of Energy's (DOE) Hanford Site in Washington State. The RPSF is designed to replace an existing facility at DOE's Mound Site near Dayton, Ohio, where General Purpose Heat Source (GPHS) modules are currently assembled and installed into Radioisotope Thermoelectric Generators (RTG). The overall design goal of the RPSF is to increase annual production throughput, while at the same time reducing annual radiation exposure to personnel. The shield rack design successfully achieved this goal for the Module Reduction and Monitoring Facility (MRMF), which processes and stores assembled GPHS modules, prior to their installation into RTGs. The shield rack design is simple and effective, with the result that background radiation levels within Hanford's MRMF room are calculated at just over three percent of those typically experienced during operation of the existing MRMF at Mound, despite the fact that Hanford's calculations assume five times the GPHS inventory of that assumed for Mound.

Sherrell, D.L. (Westinghouse Hanford Company, P.O. Box 1970, Mail Stop N1-42, Richland, Washington 99352 (United States))

1993-01-15T23:59:59.000Z

98

Electron-beam processing of kilogram quantities of iridium for radioisotope thermoelectric generator applications  

SciTech Connect (OSTI)

Iridium alloys are used as fuel-cladding materials in radioisotope thermoelectric generators (RTGs). Hardware produced at the Oak Ridge National Laboratory (ORNL) has been used in Voyagers I and 2, Galilee, and Ulysses spacecraft. An integral part of the production of iridium-sheet metal involves electron-beam (EB) processing. These processes include the degassing of powder-pressed compacts followed by multiple meltings in order to purify 500-g buttons of Ir-0.3% W alloy. Starting in 1972 and continuing into 1992, our laboratory EB processing was Performed (ca. 1970) in a 60-kW (20 kV at 3 A), two-gun system. In 1991, a new 150-kW EB gun facility was installed to complement the older unit. This paper describes how the newly installed system was qualified for production of RTG developmental work is discussed that will potentially improve the existing process by utilizing the capabilities of the new EB system.

Huxford, T.J.; Ohriner, E.K.

1992-01-01T23:59:59.000Z

99

Electron-beam processing of kilogram quantities of iridium for radioisotope thermoelectric generator applications  

SciTech Connect (OSTI)

Iridium alloys are used as fuel-cladding materials in radioisotope thermoelectric generators (RTGs). Hardware produced at the Oak Ridge National Laboratory (ORNL) has been used in Voyagers I and 2, Galilee, and Ulysses spacecraft. An integral part of the production of iridium-sheet metal involves electron-beam (EB) processing. These processes include the degassing of powder-pressed compacts followed by multiple meltings in order to purify 500-g buttons of Ir-0.3% W alloy. Starting in 1972 and continuing into 1992, our laboratory EB processing was Performed (ca. 1970) in a 60-kW (20 kV at 3 A), two-gun system. In 1991, a new 150-kW EB gun facility was installed to complement the older unit. This paper describes how the newly installed system was qualified for production of RTG developmental work is discussed that will potentially improve the existing process by utilizing the capabilities of the new EB system.

Huxford, T.J.; Ohriner, E.K.

1992-12-31T23:59:59.000Z

100

A shielded storage and processing facility for radioisotope thermoelectric generator heat source production  

SciTech Connect (OSTI)

This report discusses a shielded storage rack which has been installed as part of the Radioisotope Power Systems Facility (RPSF) at the US Department of Energy's (DOE) Hanford Site in Washington State. The RPSF is designed to replace an existing facility at DOE's Mound Site near Dayton, Ohio, where General Purpose Heat Source (GPHS) modules are currently assembled and installed into Radioisotope Thermoelectric Generators (RTG). The overall design goal of the RPSF is to increase annual production throughput, while at the same time reducing annual radiation exposure to personnel. The shield rack design successfully achieved this goal for the Module Reduction and Monitoring Facility (MRMF), which process and stores assembled GPHS modules, prior to their installation into RTGS. The shield rack design is simple and effective, with the result that background radiation levels within Hanford's MRMF room are calculated at just over three percent of those typically experienced during operation of the existing MRMF at Mound, despite the fact that Hanford's calculations assume five times the GPHS inventory of that assumed for Mound.

Sherrell, D.L.

1992-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermoelectric generator rtg" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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to obtain the most current and comprehensive results.


101

A shielded storage and processing facility for radioisotope thermoelectric generator heat source production  

SciTech Connect (OSTI)

This report discusses a shielded storage rack which has been installed as part of the Radioisotope Power Systems Facility (RPSF) at the US Department of Energy`s (DOE) Hanford Site in Washington State. The RPSF is designed to replace an existing facility at DOE`s Mound Site near Dayton, Ohio, where General Purpose Heat Source (GPHS) modules are currently assembled and installed into Radioisotope Thermoelectric Generators (RTG). The overall design goal of the RPSF is to increase annual production throughput, while at the same time reducing annual radiation exposure to personnel. The shield rack design successfully achieved this goal for the Module Reduction and Monitoring Facility (MRMF), which process and stores assembled GPHS modules, prior to their installation into RTGS. The shield rack design is simple and effective, with the result that background radiation levels within Hanford`s MRMF room are calculated at just over three percent of those typically experienced during operation of the existing MRMF at Mound, despite the fact that Hanford`s calculations assume five times the GPHS inventory of that assumed for Mound.

Sherrell, D.L.

1992-06-01T23:59:59.000Z

102

Status of Segmented Element Thermoelectric Generator for Vehicle Waste Heat Recovery  

Broader source: Energy.gov [DOE]

Discusses progress of thermoelectric generator development at BSST and assessment of potential to enter commercial operation in vehicles

103

Thermal Conductivity of Polycrystalline Semiconductors and Ceramics  

E-Print Network [OSTI]

RTG refers to radioisotope thermoelectric generator with aRTG refers to radioisotope thermoelectric generator with a

Wang, Zhaojie

2012-01-01T23:59:59.000Z

104

SYSTEM OPTIMIZTION OF HOT WATER CONCENTRATED SOLAR THERMOELECTRIC GENERATION  

E-Print Network [OSTI]

In this report, we describe the design of a concentrated solar thermoelectric (TE) system which can provide both electricity and hot water. Today’s thermoelectric materials have a relatively low efficiency (~6 % for temperature difference across the thermoelement on the order of 300 o C). However since thermoelectrics don’t need their cold side to be near room temperature, (in another word, one can chose the particular thermoelectric material to match to the operational temperature) it is possible to use the waste heat to provide hot water and this makes the overall efficiency of the combined system to be quite high. A key factor in the optimization of the thermoelectric module is the thermal impedance matching with the incident solar radiation, and also with the hot water heat exchanger on the cold side of the thermoelectric module. We have developed an analytic model for the whole system and optimized each component in order to minimize the material cost. TE element fill factor is found to be an important parameter to optimize at low solar concentrations (generated per mass of the thermoelectric elements. Similarly the co-optimization of the microchannel heat exchanger and the TE module can be used to minimize the amount of material in the heat exchanger and the pumping power required for forced convection liquid cooling. Changing the amount of solar concentration, changes the input heat flux and this is another parameter that can be optimized in order to reduce the cost of heat exchanger (by size), the tracking requirement and the whole system. A series of design curves for different solar concentration are obtained. It is shown that the overall efficiency of the system can be more than 80 % at 200x concentration which is independent of the material ZT (TE figure-of-merit). For a material with ZThot~0.9, the electrical conversion efficiency is ~10%. For advanced materials with ZThot ~ 2.8, the electrical conversion efficiency could reach ~21%. 1.

Kazuaki Yazawa; Ali Shakouri

105

Molybdenum-platinum-oxide electrodes for thermoelectric generators  

DOE Patents [OSTI]

The invention is directed to a composite article suitable for use in thermoelectric generators. The article comprises a solid electrolyte carrying a thin film comprising molybdenum-platinum-oxide as an electrode deposited by physical deposition techniques. The invention is also directed to the method of making same.

Schmatz, Duane J. (Dearborn Heights, MI)

1990-01-01T23:59:59.000Z

106

Radioisotope Thermoelectric Generator F7 Flight Unit Acceptance Buy Off  

SciTech Connect (OSTI)

These are viewgraphs from the subject presentation. The LMMS E-7 history is outlined; Qualification and use of the F-7 GPHS-RTG for the Cassini mission; and the F-7 acceptance test program and performance are described.

none,

1997-02-20T23:59:59.000Z

107

Optimal working conditions for thermoelectric generators with realistic thermal coupling  

E-Print Network [OSTI]

We study how maximum output power can be obtained from a thermoelectric generator(TEG) with nonideal heat exchangers. We demonstrate with an analytic approach based on a force-flux formalism that the sole improvement of the intrinsic characteristics of thermoelectric modules including the enhancement of the figure of merit is of limited interest: the constraints imposed by the working conditions of the TEG must be considered on the same footing. Introducing an effective thermal conductance we derive the conditions which permit maximization of both efficiency and power production of the TEG dissipatively coupled to heat reservoirs. Thermal impedance matching must be accounted for as well as electrical impedance matching in order to maximize the output power. Our calculations also show that the thermal impedance does not only depend on the thermal conductivity at zero electrical current: it also depends on the TEG figure of merit. Our analysis thus yields both electrical and thermal conditions permitting optima...

Apertet, Y; Glavatskaya, O; Goupil, C; Lecoeur, P

2011-01-01T23:59:59.000Z

108

Development of an Underamor 1-kW Thermoelectric Generator Waste...  

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

1-kW Thermoelectric Generator Waste Heat Recovery System for Military Vehicles 2004 Diesel Engine Emissions Reduction (DEER) Conference Presentation: Hi-Z Technology, Inc....

109

Thermoelectric-Generator-Based DC-DC Conversion Network for Automotive Applications.  

E-Print Network [OSTI]

?? As waste heat recovering techniques, especially thermoelectric generator (TEG technologies, develop during recent years?its utilization in automotive industry is attempted from many aspects. Previous… (more)

Li, Molan

2011-01-01T23:59:59.000Z

110

Radioisotope thermoelectric generator licensed hardware package and certification tests  

SciTech Connect (OSTI)

This paper presents the Licensed Hardware package and the Certification Test portions of the Radioisitope Themoelectric Generator Transportation System. This package has been designed to meet those portions of the {ital Code} {ital of} {ital Federal} {ital Regulations} (10 CFR 71) relating to ``Type B`` shipments of radioactive materials. The licensed hardware is now in the U. S. Department of Energy licensing process that certifies the packaging`s integrity under accident conditions. The detailed information for the anticipated license is presented in the safety analysis report for packaging, which is now in process and undergoing necessary reviews. As part of the licensing process, a full-size Certification Test Article unit, which has modifications slightly different than the Licensed Hardware or production shipping units, is used for testing. Dimensional checks of the Certification Test Article were made at the manufacturing facility. Leak testing and drop testing were done at the 300 Area of the U.S. Department of Energy`s Hanford Site near Richland, Washington. The hardware includes independent double containments to prevent the environmental spread of {sup 238}Pu, impact limiting devices to protect portions of the package from impacts, and thermal insulation to protect the seal areas from excess heat during accident conditions. The package also features electronic feed-throughs to monitor the Radioisotope Thermoelectric Generator`s temperature inside the containment during the shipment cycle. This package is designed to safely dissipate the typical 4,500 thermal watts produced in the largest Radioisotope Thermoelectric Generators. The package also contains provisions to ensure leak tightness when radioactive materials, such as a Radioisotope Thermoelectric Generator for the Cassini Mission, planned for 1997 by the National Aeronautics and Space Administration, are being prepared for shipment. (Abstract Truncated)

Goldmann, L.H.; Averette, H.S. [Westinghouse Hanford Company, P.O. Box 1970, M/S R3-86 or N1-32, Richland, Washington 99352 (United States)

1995-01-20T23:59:59.000Z

111

System and method to improve the power output and longetivity of a radioisotope thermoelectric generator  

SciTech Connect (OSTI)

By using the helium generated by the alpha emissions of a thermoelectric generator during space travel for cooling, the thermal degradation of the thermoelectric generator can be slowed. Slowing degradation allows missions to be longer with little additional expense or payload.

Mowery, Jr., Alfred L. (Potomac, MD)

1993-01-01T23:59:59.000Z

112

System and method to improve the power output and longevity of a radioisotope thermoelectric generator  

SciTech Connect (OSTI)

By using the helium generated by the alpha emissions of a thermoelectric generator during space travel for cooling, the thermal degradation of the thermoelectric generator can be slowed. Slowing degradation allows missions to be longer with little additional expense or payload. 1 figures.

Mowery, A.L. Jr.

1993-09-21T23:59:59.000Z

113

System and method to improve the power output and longetivity of a radioisotope thermoelectric generator  

SciTech Connect (OSTI)

By using the helium generated by the alpha emissions of a thermoelectric generator during space travel for cooling the thermal degradation of the thermoelectric generator can be slowed. Slowing degradation allows missions to be longer with little additional expense or payload.

Mowery, A.L. Jr.

1992-12-31T23:59:59.000Z

114

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...

115

Potential health risks from postulated accidents involving the Pu-238 RTG (radioisotope thermoelectric generator) on the Ulysses solar exploration mission  

SciTech Connect (OSTI)

Potential radiation impacts from launch of the Ulysses solar exploration experiment were evaluated using eight postulated accident scenarios. Lifetime individual dose estimates rarely exceeded 1 mrem. Most of the potential health effects would come from inhalation exposures immediately after an accident, rather than from ingestion of contaminated food or water, or from inhalation of resuspended plutonium from contaminated ground. For local Florida accidents (that is, during the first minute after launch), an average source term accident was estimated to cause a total added cancer risk of up to 0.2 deaths. For accidents at later times after launch, a worldwide cancer risk of up to three cases was calculated (with a four in a million probability). Upper bound estimates were calculated to be about 10 times higher. 83 refs.

Goldman, M. (California Univ., Davis, CA (USA)); Nelson, R.C. (EG and G Idaho, Inc., Idaho Falls, ID (USA)); Bollinger, L. (Air Force Inspection and Safety Center, Kirtland AFB, NM (USA)); Hoover, M.D. (Lovelace Biomedical and Environmental Research Inst., Albuquerque, NM (USA). Inhalation Toxicology Research Inst.); Templeton, W. (Pacific Northwest Lab., Richland, WA (USA)); Anspaugh, L. (Lawren

1990-11-02T23:59:59.000Z

116

Potential improvements in SiGe radioisotope thermoelectric generator performance  

SciTech Connect (OSTI)

In accordance with NASA{close_quote}s slogan: {open_quotes}Better, Cheaper, Faster,{close_quotes} this paper will address potential improvements to SiGe RTG technology to make them Better. RTGs are doubtless cheaper than {open_quotes}paper designs{close_quotes} which are better and cheaper until development, performance and safety test costs are considered. RTGs have the advantage of being fully developed and tested in the rigors of space for over twenty years. Further, unless a new system can be accelerated tested, as were the RTGs, they cannot be deployed reliably unless a number of systems have succeeded for test periods exceeding the mission lifetime. Two potential developments are discussed that can improve the basic RTG performance by 10 to 40{sup +}{percent} depending on the mission profile. These improvements could be demonstrated in years. Accelerated testing could also be performed in this period to preserve existing RTG reliability. Data from a qualification tested RTG will be displayed, while not definitive, to support the conclusions. Finally, it is anticipated that other investigators will be encouraged to suggest further modifications to the basic RTG design to improve its performance. {copyright} {ital 1999 American Institute of Physics.}

Mowery, A.L. [4 Myrtle Bank Lane, Hilton Head Island, South Carolina, 29926-2650 (United States)

1999-01-01T23:59:59.000Z

117

Procurement of a fully licensed radioisotope thermoelectric generator transportation system  

SciTech Connect (OSTI)

A fully licensed transportation system for Radioisotope Thermoelectric Generators and Light-Weight Radioisotope Heater Units is currently being designed and built. The system will comply with all applicable U.S. Department of Transportation regulations without the use of a DOE Alternative.'' The U.S. Department of Transportation has special double containment'' requirements for plutonium. The system packaging uses a doubly contained bell jar'' concept. A refrigerated trailer is used for cooling the high-heat payloads. The same packaging is used for both high- and low-heat payloads. The system is scheduled to be available for use by mid-1992.

Adkins, H.E.; Bearden, T.E. (Westinghouse Hanford Company, P.O. Box 1970, N1-42, Richland, Washington 99352 (US))

1991-01-01T23:59:59.000Z

118

Procurement of a fully licensed radioisotope thermoelectric generator transportation system  

SciTech Connect (OSTI)

A fully licensed transportation system for Radioisotope Thermoelectric Generators and Light-Weight Radioisotope Heater Units is currently being designed and built. The system will comply with all applicable US Department of Transportation regulations without the use of a DOE Alternative.'' The US Department of Transportation has special double containment'' requirements for plutonium. The system packaging uses a doubly contained bell jar'' concept. A refrigerated trailer is used for cooling the high-heat payloads. The same packaging is used for both high- and low-heat payloads. The system is scheduled to be available for use by mid-1992. 4 refs., 4 figs., 2 tabs.

Adkins, H.E.; Bearden, T.E.

1990-10-01T23:59:59.000Z

119

IMPROVING THE EFFICIENCY OF THERMOELECTRIC GENERATORS BY USING SOLAR HEAT CONCENTRATORS  

E-Print Network [OSTI]

IMPROVING THE EFFICIENCY OF THERMOELECTRIC GENERATORS BY USING SOLAR HEAT CONCENTRATORS M. T. de : Thermoelectric generator, Solar heat concentrator, Carnot efficiency I - Introduction The global energy crisis the junctions of two different materials. For a TEG to supply a significant amount of power, several thermo

120

Thermoelectric energy converter for generation of electricity from low-grade heat  

DOE Patents [OSTI]

A thermoelectric energy conversion device which includes a plurality of thermoelectric elements is described. A hot liquid is supplied to one side of each element and a cold liquid is supplied to the other side of each element. The thermoelectric generator may be utilized to produce power from low-grade heat sources such as ocean thermal gradients, solar ponds, and low-grade geothermal resources. (WHK)

Jayadev, T.S.; Benson, D.K.

1980-05-27T23:59:59.000Z

Note: This page contains sample records for the topic "thermoelectric generator rtg" 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

Vibration Testing of the Pluto/New Horizons Radioisotope Thermoelectric Generator  

SciTech Connect (OSTI)

The Radioisotopic Thermal Generator (RTG) for the Pluto/New Horizons spacecraft was subjected to a flight dynamic acceptance test to demonstrate that it would perform successfully following launch. Seven RTGs of this type had been assembled and tested at Mound, Ohio from 1984 to 1997. This paper chronicles major events in establishing a new vibration test laboratory at the Idaho National Laboratory and the nineteen days of dynamic testing.

Charles D. Griffin

2006-06-01T23:59:59.000Z

122

Thermoelectric materials 1998 -- The next generation materials for small-scale refrigeration and power generation applications  

SciTech Connect (OSTI)

Thermoelectric materials are used in a wide variety of applications related to small-scale solid-state refrigeration or power generation. Over the past 30 years, alloys based on the Bi-Te compounds (refrigeration) [(Bi[sub 1[minus]x]Sb[sub x])[sub 2] (Te[sub 1[minus]x]Se[sub x])[sub 3

Tritt, T.M. (ed.) (Clemson Univ., SC (United States)); Kanatzidis, M.G. (ed.) (Michigan State Univ., East Lansing, MI (United States)); Mahan, G.D. (ed.) (Univ. of Tennessee, Knoxville, TN (United States)); Lyon, H.B. Jr. (ed.) (Marlow Industries, Dallas, TX (United States))

1999-01-01T23:59:59.000Z

123

Clean Diesel Engine Component Improvement Program Diesel Truck Thermoelectric Generator  

SciTech Connect (OSTI)

Hi-Z Technology, Inc. (Hi-Z) is currently developing four different auxiliary generator designs that are used to convert a portion (5 to 20%) of the waste heat from vehicle engines exhaust directly to electricity. The four designs range from 200 Watts to 10 kW. The furthest along is the 1 kW Diesel Truck Thermoelectric Generator (DTTEG) for heavy duty Class 8 Diesel trucks, which, under this program, has been subjected to 543,000 equivalent miles of bouncing and jarring on PACCARâ??s test track. Test experience on an earlier version of the DTTEG on the same track showed the need for design modifications incorporated in DTTEG Mod 2, such as a heavy duty shock mounting system and reinforcement of the electrical leads mounting system, the thermocouple mounting system and the thermoelectric module restraints. The conclusion of the 543,000 mile test also pointed the way for an upgrading to heavy duty hose or flex connections for the internal coolant connections for the TEG, and consideration of a separate lower temperature cooling loop with its own radiator. Fuel savings of up to $750 per year and a three to five year payback are believed to be possible with the 5 % efficiency modules. The economics are expected to improve considerably to approach a two year payback when the 5 kW to 10 kW generators make it to the market in a few years with a higher efficiency (20%) thermoelectric module system called Quantum Wells, which are currently under development by Hi-Z. Ultimately, as automation takes over to reduce material and labor costs in the high volume production of QW modules, a one year payback for the 5 kW to10 kW generator appears possible. This was one of the stated goals at the beginning of the project. At some future point in time, with the DTTEG becoming standard equipment on all trucks and automobiles, fuel savings from the 25% conversion of exhaust heat to useable electricity nationwide equates to a 10% reduction in the 12 to 15 million barrels per day of imported oil, that much less air pollution, and an equivalent reduction in the trade deficit, which is expected to lower the inflation rate.

N.B. Elsner; J.C. Bass; S. Ghamaty; D. Krommenhoek; A. Kushch; D. Snowden; S. Marchetti

2005-03-31T23:59:59.000Z

124

Establishing Thermo-Electric Generator (TEG) Design Targets for...  

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

Evaluate the fuel economy impact of thermoelectric devices on a conventional vehicle, using engine-in- the-loop testing and simulation studies Results: * Cold & hot start...

125

Development of a Scalable 10% Efficient Thermoelectric Generator  

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

heating performance by a factor of two High power density designs that require 16 the thermoelectric (TE) material usage of conventional designs TGM Development Methodology TGM...

126

System level modeling of thermoelectric generators for automotive...  

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

and for a wide range of operating conditions. chen.pdf More Documents & Publications Thermoelectric Waste Heat Recovery Program for Passenger Vehicles Combustion Exhaust Gas...

127

Novel thermoelectric generator for stationary power waste heat recovery .  

E-Print Network [OSTI]

??Internal combustion engines produce much excess heat that is vented to the atmosphere through the exhaust fluid. Use of solid-state thermoelectric (TE) energy conversion technology… (more)

Engelke, Kylan Wynn.

2010-01-01T23:59:59.000Z

128

Thermoelectric Generator Development at Renault Trucks-Volvo...  

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

Trucks-Volvo Group Reviews project to study the potential of thermoelectricity for diesel engines of trucks and passenger cars, where relatively low exhaust temperature is...

129

Status of Segmented Element Thermoelectric Generator for Vehicle...  

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

ring which includes TE elements Advanced Thermoelectric Solutions - 10 - Liquid tanks are attached at each end of the TEG. The cooling liquid flows counter to the flow of...

130

Overview of the integration and operation of the USA/9904/B(U)F-85 RTG transportation system (RTGTS) for Cassini and future missions  

SciTech Connect (OSTI)

The USA/9904/B(U)F-85, Radioisotope Thermoelectric Generator (RTG) Transportation System (RTGTS) was designed and tested by Westinghouse Hanford Company but was transferred to EG&G Mound Applied Technologies to transport Radioisotope Thermoelectric Generators (RTGs) in support of the Cassini mission. EG&G Mound Applied Technologies is also the RTGTS custodian. Since the RTGTS is a new system, careful scrutiny must be applied not only to the integration of the system into Mound{close_quote}s operations but also the operation of the system so as to prevent any adverse affects to the performance of the RTGs. This paper details specific precautions that have been applied to the integration and operation of the RTGTS to protect the Cassini RTGs during loading, onloading, transportation, offloading, and unloading. {copyright} {ital 1997 American Institute of Physics.}

Miller, R.G. [EGG Mound Applied Technologies P.O. Box 3000 Miamisburg, Ohio45343-3000 (United States)

1997-01-01T23:59:59.000Z

131

Overview of the integration and operation of the USA/9904/B(U)F-85 RTG transportation system (RTGTS) for Cassini and future missions  

SciTech Connect (OSTI)

The USA/9904/B(U)F-85, Radioisotope Thermoelectric Generator (RTG) Transportation System (RTGTS) was designed and tested by Westinghouse Hanford Company but was transferred to EG and G Mound Applied Technologies to transport Radioisotope Thermoelectric Generators (RTGs) in support of the Cassini mission. EG and G Mound Applied Technologies is also the RTGTS custodian. Since the RTGTS is a new system, careful scrutiny must be applied not only to the integration of the system into Mound's operations but also the operation of the system so as to prevent any adverse affects to the performance of the RTGs. This paper details specific precautions that have been applied to the integration and operation of the RTGTS to protect the Cassini RTGs during loading, onloading, transportation, offloading, and unloading.

Miller, Roger G. [EG and G Mound Applied Technologies P.O. Box 3000 Miamisburg, Ohio 45343-3000 (United States)

1997-01-10T23:59:59.000Z

132

Thermoelectric Materials, Devices and Systems:  

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

-DRAFT - FOR OFFICIAL USE ONLY - DRAFT Thermoelectric Materials, Devices and Systems: 1 Technology Assessment 2 Contents 3 1. Thermoelectric Generation ......

133

Heat exchanger design for thermoelectric electricity generation from low temperature flue gas streams .  

E-Print Network [OSTI]

??An air-to-oil heat exchanger was modeled and optimized for use in a system utilizing a thermoelectric generator to convert low grade waste heat in flue… (more)

Latcham, Jacob G. (Jacob Greco)

2009-01-01T23:59:59.000Z

134

Heat exchanger design for thermoelectric electricity generation from low temperature flue gas streams  

E-Print Network [OSTI]

An air-to-oil heat exchanger was modeled and optimized for use in a system utilizing a thermoelectric generator to convert low grade waste heat in flue gas streams to electricity. The NTU-effectiveness method, exergy, and ...

Latcham, Jacob G. (Jacob Greco)

2009-01-01T23:59:59.000Z

135

New approaches to interfacing thermoelectric generators to the load bus in a nuclear space vehicle  

E-Print Network [OSTI]

reactor and the thermoelectrics. This type oi' system wastes the excess power generated as heat. Heat dissipation in space is very difficult. In the reference design TCAs (thermoelectric converter assembly) and shunt regulators connect directly... ballast load. The variable ballast compensa, tes 1' or the variation of the load. This type of control philosophy is very inefficient. Of the power generated, some is wasted in the variable ballast by heat dissipation. New architectures of controlling...

Brohlin, Paul LeRoy

1988-01-01T23:59:59.000Z

136

Thermoelectric Alloys and Devices for Radioisotope Space Power Systems: State of the Art and Current Developments  

SciTech Connect (OSTI)

Lead telluride and silicon germanium type alloys have served over the past several decades as the preferred thermoelectric conversion materials for U. S. radioisotope thermoelectric generator (RTG) power systems for planetary deep space exploration missions. The Pioneer missions to Jupiter and Jupiter/Saturn and the Viking Mars Lander missions employed TAGS-2N (lead and germanium telluride derivatives) power conversion devices. Since 1976, silicon germanium (SiGe) alloys, incorporated into the unicouple device, have evolved as the thermoelectric materials of choice for U. S. RTG powered space missions. These include the U. S. Air Force Lincoln Experimental Satellites 8 & 9 for communications, in 1976, followed in 1977 by the National Aeronautics and Space Administration Voyager 1 and 2 planetary missions. In 1989, advanced SiGe RTGs were used to power the Galileo exploration of Jupiter and, in 1990, will be used to power the Ulysses investigation of the Sun. In addition, SiGe technology has been chosen to provide RTG power for the 1995 Comet Rendezvous and Asteroid Flyby mission and the 1996 Cassini Saturn orbiter mission. Summaries of the flight performance data for these systems are presented.; Current U. S. Department of Energy thermoelectric development activities include (1) the development of conversion devices based on hi-density, close packed couple arrays and (2) the development of improved performance silicon germanium type thermoelectric materials. The silicon germanium type "multicouple", being developed in conjunction with the Modular RTG program, is discussed in a companion paper. A lead telluride type close-packed module, discussed herein, offers the promise of withstanding high velocity impacts and, thus, is a candidate for a Mars Penetrator application.; Recent projects sponsored by the U. S. Department of Energy, including the Improved Thermoelectric Materials and Modular Radioisotope Thermoelectric Generator programs, have shown that improvements in silicon germanium thermoelectric energy conversion capabilities of at least 50 percent can be achieved by tailoring the characteristics of the silicon germanium alloy materials and devices. This paper compares the properties and characteristics of the SiGe alloys now being developed with those used in the operational space power system.

Barnett, W.; Dick, P.; Beaudry, B.; Gorsuch, P.; Skrabek, E.

1989-01-01T23:59:59.000Z

137

Oxide based thermoelectric materials for large scale power generation  

E-Print Network [OSTI]

The thermoelectric (TE) devices are based on the Seebeck and Peltier effects, which describe the conversion between temperature gradient and electricity. The effectiveness of the material performance can be described by ...

Song, Yang, M. Eng. Massachusetts Institute of Technology

2008-01-01T23:59:59.000Z

138

Thermoelectric Power Generation as an Alternative Green Technology of Energy Harvesting  

E-Print Network [OSTI]

The vast majority of heat that is generated from computer processor chips to car engines to electric power plants, the need to use of excess heat creates a major source of inefficiency. Energy harvesters are thermoelectric materials which are solid-state energy converters used to convert waste heat into electricity. Significant improvements to the thermoelectric materials measured by figure of merit (ZT).forconverting waste-heat energy directly into electrical power, application of this alternative green technology can be made and also it will improve the overall efficiencies of energy conversion systems. In this paper, the basic concepts of thermoelectric material and its power generation is presented and recent patents of thermoelectric material are reviewed and discussed.

Ravi R. Nimbalkar; Sanket S. Kshirsagar

139

Thermoelectric generators incorporating phase-change materials for waste heat recovery from engine exhaust  

DOE Patents [OSTI]

Thermoelectric devices, intended for placement in the exhaust of a hydrocarbon fuelled combustion device and particularly suited for use in the exhaust gas stream of an internal combustion engine propelling a vehicle, are described. Exhaust gas passing through the device is in thermal communication with one side of a thermoelectric module while the other side of the thermoelectric module is in thermal communication with a lower temperature environment. The heat extracted from the exhaust gasses is converted to electrical energy by the thermoelectric module. The performance of the generator is enhanced by thermally coupling the hot and cold junctions of the thermoelectric modules to phase-change materials which transform at a temperature compatible with the preferred operating temperatures of the thermoelectric modules. In a second embodiment, a plurality of thermoelectric modules, each with a preferred operating temperature and each with a uniquely-matched phase-change material may be used to compensate for the progressive lowering of the exhaust gas temperature as it traverses the length of the exhaust pipe.

Meisner, Gregory P; Yang, Jihui

2014-02-11T23:59:59.000Z

140

E-Print Network 3.0 - aspekte bei der Sample Search Results  

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

bei Raumsonden 12... Energiequellen: 4 40 Watt RTG's (RTG: Radioisotope thermoelectric generator) ... Source: Aste, Andreas - Institut fr Physik, Universitt Basel...

Note: This page contains sample records for the topic "thermoelectric generator rtg" 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

Proactive Strategies for Designing Thermoelectric Materials for...  

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

& Publications Proactive Strategies for Designing Thermoelectric Materials for Power Generation Proactive Strategies for Designing Thermoelectric Materials for Power Generation...

142

The potential impacts of climate-change policy on freshwater use in thermoelectric power generation  

E-Print Network [OSTI]

The potential impacts of climate-change policy on freshwater use in thermoelectric power generation to generate electricity. We analyze what these changes could entail for electricity generation in the United carbon prices (4$50/tonne CO2), however, retrofitting coal plants to capture CO2 increases freshwater

Jackson, Robert B.

143

The preliminary design of thermoelectric generation system using the fluid heat sources  

SciTech Connect (OSTI)

This paper describes the preliminary design of a thermoelectric generation system using the fluid heat sources available as the waste heat of the phosphoric acid fuel cells. The thermoelectric generator consists of many thermoelectric generation units. For estimating the output performance of the thermoelectric generator, an equilibrium thermal circuit was derived from an analytic model of a thermoelectric generation unit. Based on the equivalent thermal circuit, the output performance at thermal equilibrium was calculated by iteration. In this paper, the output performance was estimated considering the cold side pumping power. The calculation was done by assuming a heat source temperature of about 450K on the hot side, about 310 K on the cold side, and 2,000kWth as heat exchange capacity. The electric power of the generator with a size of 1.5 x 1.5 x 1.4 (h) m{sup 3} was found to be about 70 kW and its power density, about 1.5 kW/m{sup 2} excepting the pumping power on the cold water side.

Hori, Y.; Ito, T. [Central Research Inst. of Electric Power Industry, Yokosuka, Kanagawa (Japan)

1995-12-31T23:59:59.000Z

144

The Electrodeposition of PbTe Nanowires for Thermoelectric Applications  

E-Print Network [OSTI]

of thermoelectrics. Radioisotope Thermoelectric Generatorthermoelectric generators use radiation from the sun instead of a radioisotope

Hillman, Peter

2012-01-01T23:59:59.000Z

145

Why Blow Away Heat? Harvest Server's Heat Using Ther-moelectric Generators  

E-Print Network [OSTI]

Why Blow Away Heat? Harvest Server's Heat Using Ther- moelectric Generators Ted Tsung-Te Lai, Wei ABSTRACT This paper argues for harvesting energy from servers' wasted heat in data centers. Our approach is to distribute a large number of thermoelectric generators (TEGs) on or nearby server hotspot components whose

Huang, Polly

146

Vehicular Thermoelectric Applications Session DEER 2009  

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

Or this? Car of the Future? International Thermoelectric Conference 2009 - Frieburg, Germany U.S. Spacecraft using Radioisotope Thermoelectric Power Generators Thermoelectric...

147

High Temperature Experimental Characterization of Microscale Thermoelectric Effects  

E-Print Network [OSTI]

Mission Radioisotope Thermoelectric Generator (MMRTG) FactFigure 1.1: Radioisotope thermoelectric generator used byhand side radioisotope thermoelectric generator reflectivity

Favaloro, Tela

2014-01-01T23:59:59.000Z

148

High Temperature Experimental Characterization of Microscale Thermoelectric Effects  

E-Print Network [OSTI]

G. P. , Thermoelectric Generators for Automotive Waste Heatinto thermoelectric generators for waste heat recovery inThermoelectric Materials and Generator Technology for Automotive Waste Heat

Favaloro, Tela

2014-01-01T23:59:59.000Z

149

Synthesis and Characterization of 14-1-11 Ytterbium Manganese Antimonide Derivatives for Thermoelectric Applications  

E-Print Network [OSTI]

have made radioisotope thermoelectric generators (RTGs),Mission Radioisotope Thermoelectric Generator (MMRTG) used

Star, Kurt

2013-01-01T23:59:59.000Z

150

Radioisotope thermoelectric generator transportation system safety analysis report for packaging. Volumes 1 and 2  

SciTech Connect (OSTI)

This SARP describes the RTG Transportation System Package, a Type B(U) packaging system that is used to transport an RTG or similar payload. The payload, which is included in this SARP, is a generic, enveloping payload that specifically encompasses the General Purpose Heat Source (GPHS) RTG payload. The package consists of two independent containment systems mounted on a shock isolation transport skid and transported within an exclusive-use trailer.

Ferrell, P.C.

1996-04-18T23:59:59.000Z

151

Logistical concepts associated with international shipments using the USA/9904/B(U)F RTG Transportation System (RTGTS)  

SciTech Connect (OSTI)

Over the last 30 years, radioisotopes have provided heat from which electrical power is generated. For space missions, the isotope of choice has generally been {sup 238}PuO{sub 2}, its long half-life making it ideal for supplying power to remote satellites and spacecraft like the Voyager, Pioneer, and Viking missions, as well as the recently launched Galileo and Ulysses missions, and the presently planned Cassini mission. Electric power for future space missions will be provided by either radioisotopic thermoelectric generators (RTG), radioisotope thermophotovoltaic systems (RTPV), alkali metal thermal to electrical conversion (AMTEC) systems, radioisotope Stirling systems, or a combination of these. The type of electrical power system has yet to be specified for the {open_quotes}Pluto Express{close_quotes} mission. However, the current plan does incorporate the use of Russian launch platforms for the spacecraft. The implied tasks associated with this plan require obtaining international certification for the transport of the radioisotopic power system, and resolving any logistical issues associated with the actual shipment of the selected radioisotopic power system. This paper presents a conceptual summary of the logistical considerations associated with shipping the selected radioisotopic power system using the USA/9904/B(U)F-85, Radioisotope Thermoelectric Generator Transportation System (RTGTS). {copyright} {ital 1997 American Institute of Physics.}

Barklay, C.D.; Miller, R.G.; Pugh, B.K.; Howell, E.I. [EGG Mound Applied Technologies P.O. Box 3000 Miamisburg, Ohio45343-3000 (United States)

1997-01-01T23:59:59.000Z

152

Logistical concepts associated with international shipments using the USA/9904/B(U)F RTG Transportation System (RTGTS)  

SciTech Connect (OSTI)

Over the last 30 years, radioisotopes have provided heat from which electrical power is generated. For space missions, the isotope of choice has generally been {sup 238}PuO{sub 2}, its long half-life making it ideal for supplying power to remote satellites and spacecraft like the Voyager, Pioneer, and Viking missions, as well as the recently launched Galileo and Ulysses missions, and the presently planned Cassini mission. Electric power for future space missions will be provided by either radioisotopic thermoelectric generators (RTG), radioisotope thermophotovoltaic systems (RTPV), alkali metal thermal to electrical conversion (AMTEC) systems, radioisotope Stirling systems, or a combination of these. The type of electrical power system has yet to be specified for the 'Pluto Express' mission. However, the current plan does incorporate the use of Russian launch platforms for the spacecraft. The implied tasks associated with this plan require obtaining international certification for the transport of the radioisotopic power system, and resolving any logistical issues associated with the actual shipment of the selected radioisotopic power system. This paper presents a conceptual summary of the logistical considerations associated with shipping the selected radioisotopic power system using the USA/9904/B(U)F-85, Radioisotope Thermoelectric Generator Transportation System (RTGTS)

Barklay, Chadwick D.; Miller, Roger G.; Pugh, Barry K.; Howell, Edwin I. [EG and G Mound Applied Technologies P.O. Box 3000 Miamisburg, Ohio 45343-3000 (United States)

1997-01-10T23:59:59.000Z

153

Proof-of-principle test for thermoelectric generator for diesel engines; Final report  

SciTech Connect (OSTI)

In September of 1987, the principals of what is now Hi-Z TECHNOLOGY, INC. applied to the National Bureau of Standards (now National Institute of Standards and Technology, NIST) under the Energy Related Inventions Program. The invention was entitled ``Thermoelectric Generator for Diesel Engines.`` The National Institute of Standards and Technology evaluated the invention and on January 12, 1989 forwarded Recommendation Number 455 to the Department of Energy (DOE). This recommendation informed the DOE that the invention had been selected for recommendation by the NIST for possible funding by the DOE. Following the recommendation of the NIST, the DOE contacted Hi-Z to work out a development program for the generator. A contract for a grant to design, fabricate, and test a Proof-of-Principle exhaust powered thermoelectric generator for Diesel engines was signed October 19, 1989. Hi-Z provided the thermoelectric modules used in the generator as their contribution to the project. The purpose of this Grant Program was to design, build, and test a small-scale, Proof-of-Principle thermoelectric generator for a Diesel engine. 15 figs., 1 tab.

NONE

1991-07-26T23:59:59.000Z

154

Engineering and Materials for Automotive Thermoelectric Applications...  

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

and Materials for Automotive Thermoelectric Applications Engineering and Materials for Automotive Thermoelectric Applications Design and optimization of TE exhaust generator,...

155

Performance of the 1 kW thermoelectric generator for diesel engines  

SciTech Connect (OSTI)

Hi-Z Technology, Inc. (Hi-Z) has been developing a 1 kW thermoelectric generator for class eight Diesel truck engines under U.S. Department of Energy and California Energy Commission funding since 1992. The purpose of this generator is to replace the currently used shaft-driven alternator by converting part of the waste heat in the engine`s exhaust directly to electricity. The preliminary design of this generator was reported at the 1992 meeting of the XI-ICT in Arlington, Texas. This paper will report on the final mechanical, thermal and thermoelectric design of this generator. The generator uses seventy-two of Hi-Z`s 13 Watt bismuth-telluride thermoelectric modules for energy conversion. The number of modules and their arrangement has remained constant through the program. The 1 kW generator was tested on several engines during the development process. Many of the design features were changed during this development as more information was obtained. We have only recently reached our design goal of 1 kW output. The output parameters of the generator are reported. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.

Bass, J.C.; Elsner, N.B.; Leavitt, F.A. [Hi-Z Technology, Inc (??)

1994-08-10T23:59:59.000Z

156

Complex oxides useful for thermoelectric energy conversion  

DOE Patents [OSTI]

The invention provides for a thermoelectric system comprising a substrate comprising a first complex oxide, wherein the substrate is optionally embedded with a second complex oxide. The thermoelectric system can be used for thermoelectric power generation or thermoelectric cooling.

Majumdar, Arunava (Orinda, CA); Ramesh, Ramamoorthy (Moraga, CA); Yu, Choongho (College Station, TX); Scullin, Matthew L. (Berkeley, CA); Huijben, Mark (Enschede, NL)

2012-07-17T23:59:59.000Z

157

Development of thermoelectric power generation system utilizing heat of combustible solid waste  

SciTech Connect (OSTI)

The paper presents the development of thermoelectric power generation system utilizing heat of municipal solid waste. The systematic classification and design guideline are proposed in consideration of the characteristics of solid waste processing system. The conceptual design of thermoelectric power generation system is carried out for a typical middle scale incinerator system (200 ton/day) by the local model. Totally the recovered electricity is 926.5 kWe by 445 units (569,600 couples). In order to achieve detailed design, one dimensional steady state model taking account of temperature dependency of the heat transfer performance and thermoelectric properties is developed. Moreover, small scale on-site experiment on 60 W class module installed in the real incinerator is carried out to extract various levels of technological problems. In parallel with the system development, high temperature thermoelectric elements such as Mn-Si and so on are developed aiming the optimization of ternary compound and high performance due to controlled fine-grain boundary effect. The manganese silicide made by shrinking-rate controlled sintering method performs 5 ({mu}W/cm K{cflx 2}) in power factor at 800 K. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.

Kajikawa, T.; Ito, M.; Katsube, I. [Shonan Institute of Technology, Fujisawa, Kanagawa, 251 (Japan); Shibuya, E. [NKK Corporation, Yokohama, Kanagawa, 230 (Japan)

1994-08-10T23:59:59.000Z

158

Freshwater Availability and Constraints on Thermoelectric Power Generation in the Southeast U.S.  

SciTech Connect (OSTI)

There is a myriad of uses to which our country's freshwater supply is currently committed. Together with increasing quantities of consumption, there are growing constraints on water availability. In our future there will be two elements of consumption at the forefront of concern: availability and efficiency. Availability of freshwater is the most important of these and is the subject of this report. To use water efficiently, we must first have it. Efficiency is key to ensuring availability for future needs. As population grows and economic and technology demands increase - especially for thermoelectric power - needs for freshwater will also increase. Thus, using our limited supplies of freshwater must be done as efficiently as possible. Thermoelectric generating industry is the largest user of our nation's water resources, including fresh, surface, ground, and saline water. Saline water use accounts for approximately 30% of thermoelectric use, while the remaining 70% is from freshwater sources. The U.S. Geological Survey (USGS) estimates that thermoelectric generation accounts for roughly 136,000 million gallons per day (MGD), or 39% of freshwater withdrawals. This ranks slightly behind agricultural irrigation as the top source of freshwater withdrawals in the U.S. in 2000. For Americans to preserve their standard of living and maintain a thriving economy it is essential that greater attention be paid to freshwater availability in efforts to meet energy demands - particularly for electric power. According to projections by the Energy Information Administration's (EIA) Annual Energy Outlook 2006 (AEO 2006) anticipated growth of thermoelectric generating capacity will be 22% between 2005 and 2030. In the 2007 Report, EIA estimates that capacity to grow from approximately 709 GW in 2005 to 862 GW in 20303. These large increases in generating capacity will result in increased water demands by thermoelectric power plants and greater competition over water between the energy sector and domestic, commercial, agricultural, industrial, and instream use sectors. The implications of these increased demands have not been adequately researched. This report is a preliminary effort to explore these implications. In addition, since this report was completed in draft form in 2007, there have been several updates and important issues brought to bear on water for energy that should be mentioned. Uncertainties include drought and climate change impacts. Policies such as commitments to Coal-to-Liquids (CTL) quotas; Ethanol production requirements; Carbon Capture and Storage (CCS) mandates; increasing nuclear power plant construction; valuing carbon and carbon dioxide emissions all have significant implications on water use and on the need for water in the power sector by 2025.

David Feldman; Amanda Slough; Gary Garrett

2008-06-01T23:59:59.000Z

159

Heliospheric Energetic Particle Reservoirs: Ulysses and ACE 175-315 keV Electron Observations  

E-Print Network [OSTI]

there is also the additional and dominant contribution from the radioisotope thermoelectric generator (RTG

Sanahuja, Blai

Note: This page contains sample records for the topic "thermoelectric generator rtg" 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

Nanocomposites as thermoelectric materials  

E-Print Network [OSTI]

Thermoelectric materials have attractive applications in electric power generation and solid-state cooling. The performance of a thermoelectric device depends on the dimensionless figure of merit (ZT) of the material, ...

Hao, Qing

2010-01-01T23:59:59.000Z

162

Thermoelectrics Partnership: Automotive Thermoelectric Modules...  

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

Solution for Automotive Thermoelectric Modules Application Thermoelectrics Partnership: Automotive Thermoelectric Modules with Scalable Thermo- and Electro-Mechanical Interfaces...

163

Thermoelectrics Partnership: High Performance Thermoelectric...  

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

High Performance Thermoelectric Waste Heat Recovery System Based on Zintl Phase Materials with Embedded Nanoparticles Thermoelectrics Partnership: High Performance Thermoelectric...

164

Proactive Strategies for Designing Thermoelectric Materials for...  

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

Proactive Strategies for Designing Thermoelectric Materials for Power Generation Proactive Strategies for Designing Thermoelectric Materials for Power Generation 2009 DOE Hydrogen...

165

Nonequilibrium Thermoelectrics: Low-Cost, High-Performance Materials for Cooling and Power Generation  

SciTech Connect (OSTI)

Thermoelectric materials can be made into coolers (TECs) that use electricity to develop a temperature difference, cooling something, or generators (TEGs) that convert heat directly to electricity. One application of TEGs is to place them in a waste heat stream to recuperate some of the power being lost and putting it to use more profitably. To be effective thermoelectrics, however, materials must have both high electrical conductivity and low thermal conductivity, a combination rarely found in nature. Materials selection and processing has led to the development of several systems with a figure of merit, ZT, of nearly unity. By using non-equilibrium techniques, we have fabricated higher efficiency thermoelectric materials. The process involves creating an amorphous material through melt spinning and then sintering it with either spark plasma or a hot press for as little as two minutes. This results in a 100% dense material with an extremely fine grain structure. The grain boundaries appear to retard phonons resulting in a reduced thermal conductivity while the electrons move through the material relatively unchecked. The techniques used are low-cost and scaleable to support industrial manufacturing.

Li, Q.

2011-05-18T23:59:59.000Z

166

Develop Thermoelectric Technology for Automotive Waste Heat Recovery...  

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

More Documents & Publications Skutterudite Thermoelectric Generator For Automotive Waste Heat Recovery Thermoelectric Conversion of Exhaust Gas Waste Heat into Usable...

167

Radioisotope Thermoelectric Generator Package O-Ring Seal Material Validation Testing  

SciTech Connect (OSTI)

The Radioisotope Thermoelectric Generator Package O-Ring Seal Material Validation Test was conducted to validate the use of the Butyl material as a primary seal throughout the required temperature range. Three tests were performed at (1) 233 K ({minus}40 {degrees}F), (2) a specified operating temperature, and (3) 244 K ({minus}20 {degrees}F) before returning to room temperature. Helium leak tests were performed at each test point to determine seal performance. The two major test objectives were to establish that butyl rubber material would maintain its integrity under various conditions and within specified parameters and to evaluate changes in material properties.

Adkins, H.E.; Ferrell, P.C.; Knight, R.C.

1994-09-30T23:59:59.000Z

168

Radioisotope thermoelectric generator load and unload sequence from the licensed hardware package system and the trailer system  

SciTech Connect (OSTI)

The Radioisotope Thermoelectric Generator Transportation System, designated as System 100, comprises four major systems. The four major systems are designated as the Packaging System (System 120), Trailer System (System 140), Operations and Ancillary Equipment System (System 160), including the Radioisotope Thermoelectric Generator Transportation System packaging is licensed (regularoty) hardware, certified by the U.S. Department of Energy to be in accordance with Title 10, {ital Code} {ital of} {ital Federal} {ital Regulations}, Part 71 (10 CFR 71). System 140, System 160, and System 180 are nonlicensed (nonregulatory) hardware. This paper focuses on the required interfaces and sequencing of events required by these systems and the shipping and receiving facilities in preparation of the Radioisotope Thermoelectric Generator for space flight. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}

Reilly, M.A. [Westinghouse Hanford Company, P.O. Box 1970, MSIN N1-25, Richland, Washington 99352 (United States)

1995-01-20T23:59:59.000Z

169

New materials and devices for thermoelectric applications  

SciTech Connect (OSTI)

The development of new, more efficient materials and devices is the key to expanding the range of application of thermoelectric generators and coolers. In the last couple of years, efforts to discover breakthrough thermoelectric materials have intensified, in particular in the US. Recent results on novel materials have already demonstrated that dimensionless figure of merit ZT values 40 to 50% larger than 1.0, the current limit, could be obtained in the 475 to 950 K temperature range. New terrestrial power generation applications have been recently described in the literature. There exists a wide range of heat source temperatures for these applications, from low grade waste heat, at 325--350 K, up to 850 to 1,100 K, such as in the heat recovery from a processing plant of combustible solid waste. The automobile industry has also recently developed a strong interest in a waste exhaust heat recovery power source operating in the 375--750 K temperature range to supplement or replace the alternator and thus decrease fuel consumption. Based on results achieved to date at the Jet Propulsion Laboratory (JPL) on novel materials, the performance of an advanced segmented generator design operating in a large 300--945 K temperature gradient is predicted to achieve about 15% conversion efficiency. This would be a very substantial improvement over state-of-the-art (SOA) thermoelectric power converters. Such a terrestrial power generator could be using waste heat or liquid fuels as a heat source. High performance radioisotope generators (RTG) are still of interest for deep space missions but the shift towards small, light spacecraft has developed a need for advanced power sources in the watt to milliwatt range. The powerstick concept would provide a study, compact, lightweight and low cost answer to this need. The development of thin film thermoelectric devices also offer attractive possibilities. The combination of semiconductor technology, thermoelectric films and high thermal conductivity materials could lead to the fabrication of light weight, high voltage devices with high cooling or high electrical power density characteristics. The use of microcoolers for the thermal management of power electronics is of particular interest.

Fleurial, J.P.; Borshchevsky, A.; Caillat, T.; Ewell, R. [California Inst. of Tech., Pasadena, CA (United States). Jet Propulsion Lab.

1997-12-31T23:59:59.000Z

170

Test plan/procedure for the shock limiting device of the radioisotope thermoelectric generator package mounting subsystem 145. Revision 1  

SciTech Connect (OSTI)

This document defines the procedure to be used in the 18 inch drop test to be used for design verification of the RTG Transportation System Package Mounting.

Satoh, J.A.

1995-05-25T23:59:59.000Z

171

Proceedings of the sixth international conference on thermoelectric energy conversion  

SciTech Connect (OSTI)

This book presents the papers given at a conference on thermoelectric energy conversion. Topics considered at the conference included thermoelectric materials, the computer calculation of thermoelectric properties, the performance of crss-flow thermoelectric liquid coolers, thermoelectric cooler performance corrections for soft heat sinks, heat exchange in a thermoelectric cooling system, the optimal efficiency of a solar pond and thermoelectric generator system, and thermoelectric generation utilizing industrial waste heat as an energy source.

Rao, K.R.

1986-01-01T23:59:59.000Z

172

Synthetic thermoelectric materials comprising phononic crystals  

DOE Patents [OSTI]

Synthetic thermoelectric materials comprising phononic crystals can simultaneously have a large Seebeck coefficient, high electrical conductivity, and low thermal conductivity. Such synthetic thermoelectric materials can enable improved thermoelectric devices, such as thermoelectric generators and coolers, with improved performance. Such synthetic thermoelectric materials and devices can be fabricated using techniques that are compatible with standard microelectronics.

El-Kady, Ihab F; Olsson, Roy H; Hopkins, Patrick; Reinke, Charles; Kim, Bongsang

2013-08-13T23:59:59.000Z

173

Device for use in a furnace exhaust stream for thermoelectric generation  

DOE Patents [OSTI]

A device for generating voltage or electrical current includes an inner elongated member mounted in an outer elongated member, and a plurality of thermoelectric modules mounted in the space between the inner and the outer members. The outer and/or inner elongated members each include a plurality of passages to move a temperature altering medium through the members so that the device can be used in high temperature environments, e.g. the exhaust system of an oxygen fired glass melting furnace. The modules are designed to include a biasing member and/or other arrangements to compensate for differences in thermal expansion between the first and the second members. In this manner, the modules remain in contact with the first and second members. The voltage generated by the modules can be used to power electrical loads.

Polcyn, Adam D.

2013-06-11T23:59:59.000Z

174

Concentrated Thermoelectric Power  

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

and 24-hour operation. PROJECT DESCRIPTION The research team previously demonstrated flat-panel solar thermoelectric generators (STEGs) that produce electricity by harnessing the...

175

Radioisotope thermoelectric generator package o-ring seal material validation testing  

SciTech Connect (OSTI)

The Radioisotope Thermoelectric Generator Package O-Ring Seal Material Validation Test was conducted to validate the use of the Butyl material as a primary seal throughout the required temperature range. Three tests were performed at (I) 233 K ({minus}40 {degree}F), (2) a specified operating temperature, and (3) 244 K ({minus}20 {degree}F) before returning to room temperature. Helium leak tests were performed at each test point to determine seal performance. The two major test objectives were to establish that butyl rubber material would maintain its integrity under various conditions and within specified parameters and to evaluate changes in material properties. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}

Adkins, H.E.; Ferrell, P.C.; Knight, R.C. [Westinghouse Hanford Company, P. O. Box 1970, MSIN N1-25, Richland, Washington 99352 (United States)

1995-01-20T23:59:59.000Z

176

Certification testing of the Los Alamos National Laboratory Heat Source/Radioisotopic Thermoelectric Generator shipping container  

SciTech Connect (OSTI)

The Heat Source/Radioisotopic Thermoelectric Generator shipping counter is a Type B packaging currently under development by Los Alamos National Laboratory. Type B packaging for transporting radioactive material is required to maintain containment and shielding after being exposed to normal and hypothetical accident environments defined in Title 10 of the Code of Federal Regulations Part 71. A combination of testing and analysis is used to verify the adequacy of this packaging design. This report documents the testing portion of the design verification. Six tests were conducted on a prototype package: a water spray test, a 4-foot normal conditions drop test, a 30-foot drop test, a 40-inch puncture test, a 30-minute thermal test, and an 8-hour immersion test.

Bronowski, D.R.; Madsen, M.M.

1991-09-01T23:59:59.000Z

177

A compendium of the radioisotope thermoelectric generator transportation system and recent programmatic changes  

SciTech Connect (OSTI)

Because RTGs contain significant quantities of radioactive materials, usually plutonium-238 and its decay products, they must be transported in packages built in accordance with 10 CFR 71 (1994). To meet these regulatory requirements, US DOE commissioned Westinghouse Hanford Co. in 1988 to develop a Radioisotope Thermoelectric Generator Transportation System (RTGTS) that would fully comply while protecting RTGs from adverse environmental conditions during normal transport conditions (eg, mainly shock and heat). RTGTS is scheduled for completion Dec. 1996 and will be available to support NASA`s Cassini mission to Saturn in Oct. 1997. This paper provides an overview of the RTGTS project, discusses the hardware being produced, and summarizes various programmatic and management innovations required by recent changes at DOE.

Becker, D.L.; McCoy, J.C.

1996-03-01T23:59:59.000Z

178

Method of controlling temperature of a thermoelectric generator in an exhaust system  

DOE Patents [OSTI]

A method of controlling the temperature of a thermoelectric generator (TEG) in an exhaust system of an engine is provided. The method includes determining the temperature of the heated side of the TEG, determining exhaust gas flow rate through the TEG, and determining the exhaust gas temperature through the TEG. A rate of change in temperature of the heated side of the TEG is predicted based on the determined temperature, the determined exhaust gas flow rate, and the determined exhaust gas temperature through the TEG. Using the predicted rate of change of temperature of the heated side, exhaust gas flow rate through the TEG is calculated that will result in a maximum temperature of the heated side of the TEG less than a predetermined critical temperature given the predicted rate of change in temperature of the heated side of the TEG. A corresponding apparatus is provided.

Prior, Gregory P; Reynolds, Michael G; Cowgill, Joshua D

2013-05-21T23:59:59.000Z

179

Spin-on-doping for output power improvement of silicon nanowire array based thermoelectric power generators  

SciTech Connect (OSTI)

The output power of a silicon nanowire array (NWA)-bulk thermoelectric power generator (TEG) with Cu contacts is improved by spin-on-doping (SOD). The Si NWAs used in this work are fabricated via metal assisted chemical etching (MACE) of 0.01–0.02 ? cm resistivity n- and p-type bulk, converting ?4% of the bulk thickness into NWs. The MACE process is adapted to ensure crystalline NWs. Current-voltage and Seebeck voltage-temperature measurements show that while SOD mainly influences the contact resistance in bulk, it influences both contact resistance and power factor in NWA-bulk based TEGs. According to our experiments, using Si NWAs in combination with SOD increases the output power by an order of 3 under the same heating power due to an increased power factor, decreased thermal conductivity of the NWA and reduced Si-Cu contact resistance.

Xu, B., E-mail: bin.xu09@imperial.ac.uk; Fobelets, K. [Department of Electrical and Electronic Engineering, Imperial College London, Exhibition Road, SW7 2BT London (United Kingdom)

2014-06-07T23:59:59.000Z

180

Variable cooling circuit for thermoelectric generator and engine and method of control  

DOE Patents [OSTI]

An apparatus is provided that includes an engine, an exhaust system, and a thermoelectric generator (TEG) operatively connected to the exhaust system and configured to allow exhaust gas flow therethrough. A first radiator is operatively connected to the engine. An openable and closable engine valve is configured to open to permit coolant to circulate through the engine and the first radiator when coolant temperature is greater than a predetermined minimum coolant temperature. A first and a second valve are controllable to route cooling fluid from the TEG to the engine through coolant passages under a first set of operating conditions to establish a first cooling circuit, and from the TEG to a second radiator through at least some other coolant passages under a second set of operating conditions to establish a second cooling circuit. A method of controlling a cooling circuit is also provided.

Prior, Gregory P

2012-10-30T23:59:59.000Z

Note: This page contains sample records for the topic "thermoelectric generator rtg" 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

EXERGY ANALYSIS AND ENTROPY GENERATION MINIMIZATION OF THERMOELECTRIC WASTE HEAT RECOVERY FOR ELECTRONICS  

E-Print Network [OSTI]

Energy recovery from waste heat is attracting more and more attention. All electronic systems consume electricity but only a fraction of it is used for information processing and for human interfaces, such as displays. Lots of energy is dissipated as heat. There are some discussions on waste heat recovery from the electronic systems such as laptop computers. However the efficiency of energy conversion for such utilization is not very attractive due to the maximum allowable temperature of the heat source devices. This leads to very low limits of Carnot efficiency. In contrast to thermodynamic heat engines, Brayton cycle, free piston Stirling engines, etc., authors previously reported that thermoelectric (TE) can be a cost-effective device if the TE and the heat sink are co-optimized, and if some parasitic effects could be reduced. Since the heat already exists and it is free, the additional cost and energy payback time are the key measures to evaluate the value of the energy recovery system. In this report, we will start with the optimum model of the TE power generation system. Then, theoretical maximum output, cost impact and energy payback are evaluated in the examples of electronics system. Entropy Generation Minimization (EGM) is a method already familiar in thermal management of electronics. The optimum thermoelectric waste heat recovery design is compared with the EGM approach. Exergy analysis evaluates the useful energy flow in the optimum TE system. This comprehensive analysis is used to predict the potential future impact of the TE material development, as the dimensionless figure-ofmerit (ZT) is improved.

Kazuaki Yazawa; Ali Shakouri

182

Micro- & Nano-Technologies Enabling More Compact, Lightweight Thermoelectric Power Generation & Cooling Systems  

Broader source: Energy.gov [DOE]

Advanced thermoelectric energy recovery and cooling system weight and volume improvements with low-cost microtechnology heat and mass transfer devices are presented

183

Thermoelectrics Partnership: Automotive Thermoelectric Modules...  

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

Partnership: Automotive Thermoelectric Modules with Scalable Thermo- and Electro-Mechanical Interfaces Novel Nanostructured Interface Solution for Automotive Thermoelectric...

184

Magnesium and Manganese Silicides For Efficient And Low Cost Thermo-Electric Power Generation  

SciTech Connect (OSTI)

Thermoelectric Power Generation (TEPG) is the most efficient and commercially deployable power generation technology for harvesting wasted heat from such things as automobile exhausts, industrial furnaces, and incinerators, and converting it into usable electrical power. We investigated the materials magnesium silicide (Mg2Si) and manganese silicide (MnSi) for TEG. MgSi2 and MnSi are environmentally friendly, have constituent elements that are abundant in the earth's crust, non-toxic, lighter and cheaper. In Phase I, we successfully produced Mg2Si and MnSi material with good TE properties. We developed a novel technique to synthesize Mg2Si with good crystalline quality, which is normally very difficult due to high Mg vapor pressure and its corrosive nature. We produced n-type Mg2Si and p-type MnSi nanocomposite pellets using FAST. Measurements of resistivity and voltage under a temperature gradient indicated a Seebeck coefficient of roughly 120 V/K on average per leg, which is quite respectable. Results indicated however, that issues related to bonding resulted in high resistivity contacts. Determining a bonding process and bonding material that can provide ohmic contact from room temperature to the operating temperature is an essential part of successful device fabrication. Work continues in the development of a process for reproducibly obtaining low resistance electrical contacts.

Trivedi, Sudhir B. [Brimrose Technology Corporation; Kutcher, Susan W. [Brimrose Technology Corporation; Rosemeier, Cory A. [Brimrose Technology Corporation; Mayers, David [Brimrose Technology Corporation; Singh, Jogender [Pennsylvania State University

2013-12-02T23:59:59.000Z

185

Advanced Soldier Thermoelectric Power System for Power Generation from Battlefield Heat Sources  

SciTech Connect (OSTI)

The U.S. military uses large amounts of fuel during deployments and battlefield operations. This project sought to develop a lightweight, small form-factor, soldier-portable advanced thermoelectric (TE) system prototype to recover and convert waste heat from various deployed military equipment (i.e., diesel generators/engines, incinerators, vehicles, and potentially mobile kitchens), with the ultimate purpose of producing power for soldier battery charging, advanced capacitor charging, and other battlefield power applications. The technical approach employed microchannel technology, a unique “power panel” approach to heat exchange/TE system integration, and newly-characterized LAST (lead-antimony-silver-telluride) and LASTT (lead-antimony-silver-tin-telluride) TE materials segmented with bismuth telluride TE materials in designing a segmented-element TE power module and system. This project researched never-before-addressed system integration challenges (thermal expansion, thermal diffusion, electrical interconnection, thermal and electrical interfaces) of designing thin “power panels” consisting of alternating layers of thin, microchannel heat exchangers (hot and cold) sandwiching thin, segmented-element TE power generators. The TE properties, structurally properties, and thermal fatigue behavior of LAST and LASTT materials were developed and characterized such that the first segmented-element TE modules using LAST / LASTT materials were fabricated and tested at hot-side temperatures = 400 °C and cold-side temperatures = 40 °C. LAST / LASTT materials were successfully segmented with bismuth telluride and electrically interconnected with diffusion barrier materials and copper strapping within the module electrical circuit. A TE system design was developed to produce 1.5-1.6 kW of electrical energy using these new TE modules from the exhaust waste heat of 60-kW Tactical Quiet Generators as demonstration vehicles.

Hendricks, Terry J.; Hogan, Tim; Case, Eldon D.; Cauchy, Charles J.

2010-09-01T23:59:59.000Z

186

Thermal Energy Harvesting with Thermoelectrics for Self-powered Sensors: With Applications to Implantable Medical Devices, Body Sensor Networks and Aging in Place  

E-Print Network [OSTI]

Pu-238) radioisotope and a thermoelectric generator. The Pu-to radioisotopes. In designing thermoelectric generators for

Chen, Alic

2011-01-01T23:59:59.000Z

187

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

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

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

188

Large-dimension, high-ZT Thermoelectric Nanocomposites for High...  

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

Large-dimension, high-ZT Thermoelectric Nanocomposites for High-Power High-efficiency Waste Heat Recovery for Electricity Generation Large-dimension, high-ZT Thermoelectric...

189

Proactive Strategies for Designing Thermoelectric Materials for...  

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

thermoelectric materials design, synthesis, fabrication, and characterization for power generation using vehicle exhaust waste heat. subramanian.pdf More Documents &...

190

Mass Properties Testing and Evaluation for the Multi-Mission Radioisotope Thermoelectric Generator  

SciTech Connect (OSTI)

Mass properties (MP) measurements were performed for the Multi-Mission Radioisotope Thermoelectric Generator (MMRTG), serial number (S/N) 0X730401, the power system designated for the Mars Science Laboratory (MSL) mission. Measurements were made using new mounting fixtures at the mass properties testing station in the Idaho National Laboratory (INL) Space and Security Power Systems Facility (SSPSF). The objective of making mass properties measurements was to determine the generator’s flight configured mass and center of mass or center of gravity (CG). Using an extremely accurate platform scale, the mass of the as-tested generator was determined to be 100.117 ± 0.007 lb. Weight accuracy was determined by checking the platform scale with calibrated weights immediately prior to weighing the MMRTG.a CG measurement accuracy was assessed by surrogate testing using an inert mass standard for which the CG could be readily determined analytically. Repeated testing using the mass standard enabled the basic measurement precision of the system to be quantified in terms of a physical confidence interval about the measured CG position. However, repetitious testing with the MMRTG itself was not performed in deference to the gamma and neutron radiation dose to operators and the damage potential to the flight unit from extra handling operations. Since the mass standard had been specially designed to have a total weight and CG location that closely matched the MMRTG, the uncertainties determined from its testing were assigned to the MMRTG as well. On this basis, and at the 99% confidence level, a statistical analysis found the direct, as-measured MMRTG-MSL CG to be located at 10.816 ± 0.0011 in. measured perpendicular from the plane of the lower surface of the generator’s mounting lugs (Z direction), and offset from the generator’s long axis centerline in the X and Y directions by 0.0968 ± 0.0040 in. and 0.0276 ± 0.0026 in., respectively. These uncertainties are based simply on the statistical treatment of results from repetitive testing performed with the mass standard and included position variations that may have occurred during several mounting/dismounting operations of both the mass standard and mounting fixtures. Because of the limited data available, the computed uncertainty intervals reported are likely, although not assuredly, wider than the intervals that would have been found had more extensive data been available. However, these uncertainties do not account for other contributors to measurement uncertainty that might be applicable. These include potential weighing errors, possible tilt of the as-mounted test article, or translation of the measurement results from the MP instrument coordinates to those of the test article. Furthermore, when testing heat producing test articles such as the MMRTG, measurement degradation can occur from thermal expansion/contraction of the mounting fixtures as they heat up or cool and cause a subtle repositioning of the test article. Analyses for such impacts were made and additional uncertainty allowances were conservatively assigned to account for these. A full, detailed description is provided in this report.

Felicione, Frank S.

2009-12-01T23:59:59.000Z

191

The New Horizons Pluto Kuiper belt Mission: An Overview with Historical Context  

E-Print Network [OSTI]

is powered by a Radioisotope Thermoelectric Generator (RTG). The top level goals of the New Horizons science

Stern, S. Alan

192

Thermoelectric Applications to Truck Essential Power  

SciTech Connect (OSTI)

The subjects covered in this report are: thermoelectrics, 1-kW generator for diesel engine; self-powered heater; power for wireless data transmission; and quantum-well thermoelectrics.

John C. Bass; Norbert B. Elsner

2001-12-12T23:59:59.000Z

193

Benefits of Thermoelectric Technology for the Automobile  

Broader source: Energy.gov [DOE]

Discusses improved fuel efficiency and other benefits of automotive application of thermoelectric (power generation and heating/cooling) and the need for production quantities of high-efficiency thermoelectric modules

194

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

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

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

195

TAGS 85/2N RTG Power for Viking Lander Capsule  

DOE R&D Accomplishments [OSTI]

Results of studies performed by Isotopes, Inc., Nuclear Systems Division, to optimize and baseline a TAGS 85/2N RTG for the Viking Lander Capsule prime electrical power source are presented. These studies generally encompassed identifying the Viking RTG mission profile and design requirements, and establishing a baseline RTG design consistent with these requirements.

1969-08-00T23:59:59.000Z

196

Development and Demonstration of a Modeling Framework for Assessing the Efficacy of Using Mine Water for Thermoelectric Power Generation  

SciTech Connect (OSTI)

Thermoelectric power plants use large volumes of water for condenser cooling and other plant operations. Traditionally, this water has been withdrawn from the cleanest water available in streams and rivers. However, as demand for electrical power increases it places increasing demands on freshwater resources resulting in conflicts with other off stream water users. In July 2002, NETL and the Governor of Pennsylvania called for the use of water from abandoned mines to replace our reliance on the diminishing and sometimes over allocated surface water resource. In previous studies the National Mine Land Reclamation Center (NMLRC) at West Virginia University has demonstrated that mine water has the potential to reduce the capital cost of acquiring cooling water while at the same time improving the efficiency of the cooling process due to the constant water temperatures associated with deep mine discharges. The objectives of this project were to develop and demonstrate a user-friendly computer based design aid for assessing the costs, technical and regulatory aspects and potential environmental benefits for using mine water for thermoelectric generation. The framework provides a systematic process for evaluating the hydrologic, chemical, engineering and environmental factors to be considered in using mine water as an alternative to traditional freshwater supply. A field investigation and case study was conducted for the proposed 300 MW Beech Hollow Power Plant located in Champion, Pennsylvania. The field study based on previous research conducted by NMLRC identified mine water sources sufficient to reliably supply the 2-3,000gpm water supply requirement of Beech Hollow. A water collection, transportation and treatment system was designed around this facility. Using this case study a computer based design aid applicable to large industrial water users was developed utilizing water collection and handling principals derived in the field investigation and during previous studies of mine water and power plant cooling. Visual basic software was used to create general information/evaluation modules for a range of power plant water needs that were tested/verified against the Beech Hollow project. The program allows for consideration of blending mine water as needed as well as considering potential thermal and environmental benefits that can be derived from using constant temperature mine water. Users input mine water flow, quality, distance to source, elevations to determine collection, transport and treatment system design criteria. The program also evaluates low flow volumes and sustainable yields for various sources. All modules have been integrated into a seamless user friendly computer design aid and user's manual for evaluating the capital and operating costs of mine water use. The framework will facilitate the use of mine water for thermoelectric generation, reduce demand on freshwater resources and result in environmental benefits from reduced emissions and abated mine discharges.

None

2010-03-01T23:59:59.000Z

197

Recovering Industrial Waste Heat by the Means of Thermoelectricity  

E-Print Network [OSTI]

Recovering Industrial Waste Heat by the Means of Thermoelectricity Spring 2010 Department available thermoelectric modules and to build a thermoelectric power generator demonstration unit dependent. A calorimeter has been used to measure the heat supplied by a thermoelectric module #12;(operated

Kjelstrup, Signe

198

A miniaturized mW thermoelectric generator for nw objectives: continuous, autonomous, reliable power for decades.  

SciTech Connect (OSTI)

We have built and tested a miniaturized, thermoelectric power source that can provide in excess of 450 {micro}W of power in a system size of 4.3cc, for a power density of 107 {micro}W/cc, which is denser than any system of this size previously reported. The system operates on 150mW of thermal input, which for this system was simulated with a resistive heater, but in application would be provided by a 0.4g source of {sup 238}Pu located at the center of the device. Output power from this device, while optimized for efficiency, was not optimized for form of the power output, and so the maximum power was delivered at only 41mV. An upconverter to 2.7V was developed concurrently with the power source to bring the voltage up to a usable level for microelectronics.

Aselage, Terrence Lee; Siegal, Michael P.; Whalen, Scott; Frederick, Scott K.; Apblett, Christopher Alan; Moorman, Matthew Wallace

2006-10-01T23:59:59.000Z

199

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

SciTech Connect (OSTI)

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

Jifeng Zhang; Jean Yamanis

2007-09-30T23:59:59.000Z

200

Thermal Energy Harvesting with Thermoelectrics for Self-powered Sensors: With Applications to Implantable Medical Devices, Body Sensor Networks and Aging in Place  

E-Print Network [OSTI]

By scavenging waste heat, thermoelectric generators mightfor new thermoelectric generators to harvest waste heat fromthermoelectric energy generators (TEGs) that scavenge waste heat,

Chen, Alic

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermoelectric generator rtg" 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

Commercialization of Bulk Thermoelectric Materials for Power...  

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

& Publications Commercialization of Bulk Thermoelectric Materials for Power Generation Hydrogen Embrittlement of Pipeline Steels: Causes and Remediation Distributed Bio-Oil...

202

QUANTUM WELLS THERMOELECTRIC DEVICES FOR DIESEL ENGINES  

SciTech Connect (OSTI)

Thermoelectric materials are utilized for power generation in remote locations, on spacecraft used for interplanetary exploration, and in places where waste heat can be recovered.

Ghamaty, Saeid

2000-08-20T23:59:59.000Z

203

Modeling the thermoelectric properties of bulk and nanocomposite thermoelectric materials  

E-Print Network [OSTI]

Thermoelectric materials are materials which are capable of converting heat directly into electricity. They have long been used in specialized fields where high reliability is needed, such as space power generation. Recently, ...

Minnich, Austin (Austin Jerome)

2008-01-01T23:59:59.000Z

204

NSF/DOE Thermoelectrics Partnership: Thermoelectrics for Automotive...  

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

Thermoelectrics for Automotive Waste Heat Recovery NSFDOE Thermoelectrics Partnership: Thermoelectrics for Automotive Waste Heat Recovery Development for commercialization of...

205

Thermoelectric system  

DOE Patents [OSTI]

In one particular embodiment, an internal combustion engine is provided. The engine comprises a block, a head, a piston, a combustion chamber defined by the block, the piston, and the head, and at least one thermoelectric device positioned between the combustion chamber and the head. In this particular embodiment, the thermoelectric device is in direct contact with the combustion chamber. In another particular embodiment, a cylinder head configured to sit atop a cylinder bank of an internal combustion engine is provided. The cylinder head comprises a cooling channel configured to receive cooling fluid, valve seats configured for receiving intake and exhaust valves, and thermoelectric devices positioned around the valve seats.

Reiners, Eric A. (Washington, IL); Taher, Mahmoud A. (Peoria, IL); Fei, Dong (Peoria, IL); McGilvray, Andrew N. (East Peoria, IL)

2007-10-30T23:59:59.000Z

206

Thermoelectrics run hot and cold  

SciTech Connect (OSTI)

Thermoelectricity, or the Seebeck effect, is the physical phenomenon used in thermocouples for temperature measurement. Over the past 2-3 years there has been renewed interest in the field for use in electronic refrigeration or power generation. This article summarizes information on new materials and new concepts for materials with some possibilities of higher performance than existing materials. Thermoelectric energy conversion utilizes the heat generated when an electric current is passed through a thermoelectric material to provide a temperature gradient. Advantages of thermoelectric solid state energy conversion are compactness, quietness, and localized heating or cooling. Possible automotive uses range from power generation to seat coolers. One group of materials receiving a lot of attention is the skutterudite materials. 8 refs., 1 fig.

Tritt, T.M. [Naval Research Lab., Washington, DC (United States)

1996-05-31T23:59:59.000Z

207

BuildingaThermoelectricMug This rllorrfh,s  

E-Print Network [OSTI]

(Radioisotope Thermoelectric Generators), which are basically armored canisters holding plutonium dioxide fuel. Here, I will show how you can use these in reverseto generate electrical power. Thermoelectric Devicesfava Power BuildingaThermoelectricMug F This rllorrfh,s ?rcjae J a v a P o w e r. . . . . . . . 4 6

Lorenz, Ralph D.

208

An air-breathing, portable thermoelectric power generator based on a microfabricated silicon combustor  

E-Print Network [OSTI]

The global consumer demand for portable electronic devices is increasing. The emphasis on reducing size and weight has put increased pressure on the power density of available power storage and generation options, which ...

Marton, Christopher Henry

2011-01-01T23:59:59.000Z

209

RTG resource book for western states and provinces: Final proceedings  

SciTech Connect (OSTI)

The Western Interstate Energy Board held a workshop and liaison activities among western states, provinces, and utilities on the formation of Regional Transmission Groups (RTGs). Purpose of the activities was to examine the policy implications for western states and provinces in the formation of RTGs in the West, the implications for western ratepayers and utilities of the RTG formation and potential impacts of RTGs on the western electricity system. The workshop contributed to fulfilling the transmission access and competition objectives of Title VII of the Energy Policy Act of 1992.

NONE

1994-12-31T23:59:59.000Z

210

Combustion-thermoelectric tube  

SciTech Connect (OSTI)

In direct combustion-thermoelectric energy conversion, direct fuel injection and reciprocation of the air flowing in a solid matrix are combined with the solid conduction to allow for obtaining super-adiabatic temperatures at the hot junctions. While the solid conductivity is necessary, the relatively large thermal conductivity of the available high-temperature thermoelectric materials (e.g., Si-Ge alloys) results in a large conduction loss from the hot junctions and deteriorates the performance. Here a combustion-thermoelectric tube is introduced and analyzed. Radially averaged temperatures are used for the fluid and solid phases. A combination of external cooling of the cold junctions, and direct injection of the fuel, has been used to increase the energy conversion efficiency for low thermal conductivity, high-melting temperature thermoelectric materials. The parametric study (geometry, flow, stoichiometry, materials) shows that with the current high figure of merit, high temperature Si{sub 0.7}Ge{sub 0.3} properties, a conversion efficiency of about 11% is achievable. With lower thermal conductivities for these high-temperature materials, efficiencies about 25% appear possible. This places this energy conversion in line with the other high efficiency, direct electric power generation methods.

Park, C.W.; Kaviany, M.

1999-07-01T23:59:59.000Z

211

Nanostructures having high performance thermoelectric properties  

SciTech Connect (OSTI)

The invention provides for a nanostructure, or an array of such nanostructures, each comprising a rough surface, and a doped or undoped semiconductor. The nanostructure is an one-dimensional (1-D) nanostructure, such a nanowire, or a two-dimensional (2-D) nanostructure. The nanostructure can be placed between two electrodes and used for thermoelectric power generation or thermoelectric cooling.

Yang, Peidong; Majumdar, Arunava; Hochbaum, Allon I; Chen, Renkun; Delgado, Raul Diaz

2014-05-20T23:59:59.000Z

212

Thermoelectric Development at Hi-Z Technology  

SciTech Connect (OSTI)

An improved Thermoelectric Generator (TEG) for the Heavy Duty Class Eight Diesel Trucks is under development at Hi-Z Technology. The current TEG is equipped with the improved HZ-14 Thermoelectric module, which features better mechanical properties as well as higher electric power output. Also, the modules are held in place more securely.

Kushch, Aleksandr S.; Bass, John C.; Ghamaty, Saeid; Elsner, Norbert B.; Bergstrand, Richard A.; Furrow, David; Melvin, Mike

2002-08-25T23:59:59.000Z

213

High temperature thermoelectrics  

DOE Patents [OSTI]

In accordance with one embodiment of the present disclosure, a thermoelectric device includes a plurality of thermoelectric elements that each include a diffusion barrier. The diffusion barrier includes a refractory metal. The thermoelectric device also includes a plurality of conductors coupled to the plurality of thermoelectric elements. The plurality of conductors include aluminum. In addition, the thermoelectric device includes at least one plate coupled to the plurality of thermoelectric elements using a braze. The braze includes aluminum.

Moczygemba, Joshua E.; Biershcenk, James L.; Sharp, Jeffrey W.

2014-09-23T23:59:59.000Z

214

An Innovative System for the Efficient and Effective Treatment of Non-Traditional Waters for Reuse in Thermoelectric Power Generation  

SciTech Connect (OSTI)

This study assessed opportunities for improving water quality associated with coal-fired power generation including the use of non-traditional waters for cooling, innovative technology for recovering and reusing water within power plants, novel approaches for the removal of trace inorganic compounds from ash pond effluents, and novel approaches for removing biocides from cooling tower blowdown. This research evaluated specifically designed pilot-scale constructed wetland systems for treatment of targeted constituents in non-traditional waters for reuse in thermoelectric power generation and other purposes. The overall objective of this project was to decrease targeted constituents in non-traditional waters to achieve reuse criteria or discharge limitations established by the National Pollutant Discharge Elimination System (NPDES) and Clean Water Act (CWA). The six original project objectives were completed, and results are presented in this final technical report. These objectives included identification of targeted constituents for treatment in four non-traditional water sources, determination of reuse or discharge criteria for treatment, design of constructed wetland treatment systems for these non-traditional waters, and measurement of treatment of targeted constituents in non-traditional waters, as well as determination of the suitability of the treated non-traditional waters for reuse or discharge to receiving aquatic systems. The four non-traditional waters used to accomplish these objectives were ash basin water, cooling water, flue gas desulfurization (FGD) water, and produced water. The contaminants of concern identified in ash basin waters were arsenic, chromium, copper, mercury, selenium, and zinc. Contaminants of concern in cooling waters included free oxidants (chlorine, bromine, and peroxides), copper, lead, zinc, pH, and total dissolved solids. FGD waters contained contaminants of concern including arsenic, boron, chlorides, selenium, mercury, chemical oxygen demand (COD), and zinc. Similar to FGD waters, produced waters contained contaminants of concern that are predominantly inorganic (arsenic, cadmium, chlorides, chromium, copper, lead, mercury, nickel, sulfide, zinc, total dissolved solids), but also contained some organics (benzene, PAHs, toluene, total organic carbon, total suspended solids, and oil and grease). Constituents of concern that may cause chemical scaling, biofouling and corrosion, such as pH, hardness and ionic strength, and nutrients (P, K, and N) may also be found in all four non-traditional waters. NPDES permits were obtained for these non-traditional waters and these permit limits are summarized in tabular format within this report. These limits were used to establish treatment goals for this research along with toxicity values for Ceriodaphnia dubia, water quality criteria established by the US EPA, irrigation standards established by the United States Department of Agriculture (USDA), and reuse standards focused on minimization of damage to the power plant by treated waters. Constructed wetland treatment systems were designed for each non-traditional water source based on published literature reviews regarding remediation of the constituents of concern, biogeochemistry of the specific contaminants, and previous research. During this study, 4 non-traditional waters, which included ash basin water, cooling water, FGD water and produced water (PW) were obtained or simulated to measure constructed wetland treatment system performance. Based on data collected from FGD experiments, pilot-scale constructed wetland treatment systems can decrease aqueous concentrations of elements of concern (As, B, Hg, N, and Se). Percent removal was specific for each element, including ranges of 40.1% to 77.7% for As, 77.6% to 97.8% for Hg, 43.9% to 88.8% for N, and no measureable removal to 84.6% for Se. Other constituents of interest in final outflow samples should have aqueous characteristics sufficient for discharge, with the exception of chlorides (<2000 mg/L). Based on total dissolved solids, co-

John Rodgers; James Castle

2008-08-31T23:59:59.000Z

215

Numerical Spherically Symmetric Static Solution of the RTG Equations Outside the Matter  

E-Print Network [OSTI]

There was obtained a numerical external solution for the exact system of the RTG equations with some natural boundary conditions in the static spherically symmetric case. The properties of the solution are discussed.

A. Godizov

2007-02-21T23:59:59.000Z

216

Idaho National Laboratory: R R R R  

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

missions and select military applications. INL assembled a radioisotope thermoelectric generator (RTG) for the New Horizons mission to Pluto in 2005, and assembled and...

217

ALIGNMENT, LEVELING AND DEPLOYMENT CONSTRAINTS  

E-Print Network [OSTI]

Thermoelectric Generator (RTG) Crew Deployment Description Passive Seismic Experiment (PSE) Crew Deployment and Alignment Central Station Antenna Crew Deployment Description Leveling, Alignment, and Pointing Radioisotope

Rathbun, Julie A.

218

'"''"'' SUBJECT: OPTIONAL FOIIM NO, 10  

E-Print Network [OSTI]

POWER SUBSYSTEM 4-1 4.1 SYSTEM DESCRIPTION 4-1 4.1.1 Radioisotope Thermoelectric Generator (RTG) 4-1 4

Rathbun, Julie A.

219

APOLLO LUNAR SURFACE EXPERIMENTS PACKAGE SYSTEMS HANDBOOK This document has been prepared by the Flight Control Division, Manned  

E-Print Network [OSTI]

.1.1 Radioisotope Thermoelectric Generator (RTG) 4.1.2 Power Conditioning Unit (PCU) 4.1.3 Power Distribution Unit

Rathbun, Julie A.

220

Applied Mathematical Sciences, Vol. 4, 2010, no. 11, 505 -514 Efficiency of Inhomogeneous Thermoelectric  

E-Print Network [OSTI]

- rounding the ship. Future work in thermoelectrics includes converting waste heat from power plants, trucks Thermoelectric Generators Hong Zhou Department of Applied Mathematics Naval Postgraduate School, Monterey, CA thermoelectric generators. The effects of different physical parameters on the efficiency of a generator

Zhou, Hong

Note: This page contains sample records for the topic "thermoelectric generator rtg" 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

Develop Thermoelectric Technology for Automotive Waste Heat Recovery...  

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

Technology for Automotive Waste Heat Recovery Cost-Competitive Advanced Thermoelectric Generators for Direct Conversion of Vehicle Waste Heat into Useful Electrical Power...

222

Nanostructured Materials for Energy Generation and Storage  

E-Print Network [OSTI]

waste-heat recovery allowing for energy reuse. The limited use of thermoelectric generatorswaste-heat recovery allowing for en- ergy reuse. The limited use of thermoelectric generators

Khan, Javed Miller

2012-01-01T23:59:59.000Z

223

Parametric design study of ``mini-generator`` with 6-watt heat source  

SciTech Connect (OSTI)

The Fairchild study showed that generator designs based on a single 1-watt RHU had very poor thermal efficiencies. At their optimum operating point, more than half of the generated heat was lost through the thermal insulation. This resulted in system efficiency of only 2.2%, compared to 7.2% for current Radioisotope Thermoelectric Generators (RTGs). Moreover, there were serious doubts about the fabricability of the required multicouples, particularly of the series/parallel connections between the large number (900) of thermoelectric legs of very small cross-section (0.21 mm square). All in all, the preceding paper showed that neither JPL`s Power Stick design nor the Fairchild-generated derivatives based on the 1-watt heat source looked promising. The present paper describes a similar parametric study of a mini-generator based on a 6-watt heat source, and compares its performance and fabricability to that of the optimum Power Stick derivative and of the current RTG design for the same mission. {copyright} 1995 {ital American} {ital Institute} {ital of} {ital Physics}

Schock, A.; Or, C.T. [Orbital Sciences Corporation, 20301 Century Blvd., Germantown, Maryland 20874 (United States)

1995-01-20T23:59:59.000Z

224

Heat Transfer in Thermoelectric Materials and Devices  

E-Print Network [OSTI]

Solid-state thermoelectric devices are currently used in applications ranging from thermocouple sensors to power generators in space missions, to portable air-conditioners and refrigerators. With the ever-rising demand ...

Tian, Zhiting

225

Challenges and Opportunities in Thermoelectric Materials Research...  

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

Nanocomposites, plus Overview of Research on Thermoelectric Materials and Devices in China NSFDOE Thermoelectric Partnership: Inorganic-Organic Hybrid Thermoelectrics...

226

Scalable Routes to Efficient Thermoelectric Materials  

E-Print Network [OSTI]

thermoelectric materials consisting of epitaxially-grownefficient thermoelectric materials," Nature, vol. 451, pp.superlattice thermoelectric materials and devices," Science,

Feser, Joseph Patrick

2010-01-01T23:59:59.000Z

227

Novel Nanostructured Interface Solution for Automotive Thermoelectric...  

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

Partnership: Automotive Thermoelectric Modules with Scalable Thermo- and Electro-Mechanical Interfaces Thermoelectrics Partnership: Automotive Thermoelectric Modules with...

228

Thermoelectric recovery of waste heat -- Case studies  

SciTech Connect (OSTI)

The use of waste heat as an energy source for thermoelectric generation largely removes the constraint for the wide scale application of this technology imposed by its relatively low conversion efficiency (typically about 5%). Paradoxically, in some parasitic applications, a low conversion efficiency can be viewed as a distinct advantage. However, commercially available thermoelectric modules are designed primarily for refrigerating applications and are less reliable when operated at elevated temperatures. Consequently, a major factor which determines the economic competitiveness of thermoelectric recovery of waste heat is the cost per watt divided by the mean-time between module failures. In this paper is reported the development of a waste, warm water powered thermoelectric generator, one target in a NEDO sponsored project to economically recover waste heat. As an application of this technology case studies are considered in which thermoelectric generators are operated in both active and parasitic modes to generate electrical power for a central heating system. It is concluded that, in applications when the supply of heat essentially is free as with waste heat, thermoelectrics can compete economically with conventional methods of electrical power generation. Also, in this situation, and when the generating system is operated in a parasitic mode, conversion efficiency is not an important consideration.

Rowe, M.D.; Min, G.; Williams, S.G.K.; Aoune, A. [Cardiff School of Engineering (United Kingdom). Div. of Electronic Engineering; Matsuura, Kenji [Osaka Univ., Suita, Osaka (Japan). Dept. of Electrical Engineering; Kuznetsov, V.L. [Ioffe Physical-Technical Inst., St. Petersburg (Russian Federation); Fu, L.W. [Tsinghua Univ., Beijing (China). Microelectronics Inst.

1997-12-31T23:59:59.000Z

229

An integrated approach towards efficient, scalable, and low cost thermoelectric waste heat recovery devices for vehicles  

Broader source: Energy.gov [DOE]

Efficient, scalable, and low cost vehicular thermoelectric generators development will include rapid synthesis of thermoelectric materials, different device geometries, heat sink designs, and durability and long-term performance tests

230

Bulk dimensional nanocomposites for thermoelectric applications  

DOE Patents [OSTI]

Thermoelectric elements may be used for heat sensors, heat pumps, and thermoelectric generators. A quantum-dot or nano-scale grain size polycrystalline material the effects of size-quantization are present inside the nanocrystals. A thermoelectric element composed of densified Groups IV-VI material, such as calcogenide-based materials are doped with metal or chalcogenide to form interference barriers form along grains. The dopant used is either silver or sodium. These chalcogenide materials form nanoparticles of highly crystal grains, and may specifically be between 1- and 100 nm. The compound is densified by spark plasma sintering.

Nolas, George S

2014-06-24T23:59:59.000Z

231

NSF/DOE Thermoelectrics Partnership: Thermoelectrics for Automotive Waste Heat Recovery  

Broader source: Energy.gov [DOE]

Development for commercialization of automotive thermoelectric generators from high-ZT TE materials with using low-cost, widely available materials, system design and modeling to maximize temperature differential across TE modules and maximize power output

232

POTENTIAL THERMOELECTRIC APPLICATIONS IN DIESEL VEHICLES  

SciTech Connect (OSTI)

Novel thermodynamic cycles developed by BSST provide improvements by factors of approximately 2 in cooling, heating and power generation efficiency of solid-state thermoelectric systems. The currently available BSST technology is being evaluated in automotive development programs for important new applications. Thermoelectric materials are likely to become available that further increase performance by a comparable factor. These major advancements should allow the use of thermoelectric systems in new applications that have the prospect of contributing to emissions reduction, fuel economy, and improved user comfort. Potential applications of thermoelectrics in diesel vehicles are identified and discussed. As a case in point, the history and status of the Climate Controlled Seat (CCS) system from Amerigon, the parent of BSST, is presented. CCS is the most successful and highest production volume thermoelectric system in vehicles today. As a second example, the results of recent analyses on electric power generation from vehicle waste heat are discussed. Conclusions are drawn as to the practicality of waste power generation systems that incorporate BSST's thermodynamic cycle and advanced thermoelectric materials.

Crane, D

2003-08-24T23:59:59.000Z

233

Radioisotope Power System Delivery, Ground Support and Nuclear Safety Implementation: Use of the Multi-Mission Radioisotope Thermoelectric Generator for the NASA's Mars Science Laboratory  

SciTech Connect (OSTI)

Radioisotope power systems have been used for over 50 years to enable missions in remote or hostile environments. They are a convenient means of supplying a few milliwatts up to a few hundred watts of useable, long-term electrical power. With regard to use of a radioisotope power system, the transportation, ground support and implementation of nuclear safety protocols in the field is a complex process that requires clear identification of needed technical and regulatory requirements. The appropriate care must be taken to provide high quality treatment of the item to be moved so it arrives in a condition to fulfill its missions in space. Similarly it must be transported and managed in a manner compliant with requirements for shipment and handling of special nuclear material. This presentation describes transportation, ground support operations and implementation of nuclear safety and security protocols for a radioisotope power system using recent experience involving the Multi-Mission Radioisotope Thermoelectric Generator for National Aeronautics and Space Administration’s Mars Science Laboratory, which launched in November of 2011.

S.G. Johnson; K.L. Lively; C.C. Dwight

2014-07-01T23:59:59.000Z

234

The New Horizons Spacecraft Glen H. Fountain a  

E-Print Network [OSTI]

/1000 of the level near the Earth) require a radioisotope thermoelectric generator (RTG) to supply electrical power thermoelectric generator (RTG), which uses the thermal energy created by the decay of plutonium 238 to produce, the spacecraft must carry its own energy source. The only currently available technology is the radioisotope

Stern, S. Alan

235

High temperature thermoelectric characterization of III-V semiconductor thin films by oxide bonding  

E-Print Network [OSTI]

-W-N diffusion barrier. A thermoelectric material, thin film ErAs:InGaAlAs metal/semiconductor nanocomposite temperature to 840 K for this material and the results show the thermoelectric power factor multiplied material characterization of semiconductor thin films for thermoelectric power generation, photovoltaic

Bowers, John

236

High-Temperature Thermoelectric Characterization of IIIV Semiconductor Thin Films by Oxide Bonding  

E-Print Network [OSTI]

-temperature thermoelectric charac- terization of thin-film III­V semiconductor materials that suffer from the side- effect-temperature surface passivation, and metallization with a Ti-W-N diffusion barrier. A thermoelectric material, thin-temperature material characterization of semiconductor thin films for thermoelectric power generation, photovoltaic

237

Thermoelectric detection of spherical tin inclusions in copper by magnetic sensing  

E-Print Network [OSTI]

, respectively. Any variation in material properties can affect the measured thermoelectric voltage via SSR SS SR of different materials, or more precisely, materials of different thermoelectric power, will generate sensitive material discriminators used in nondestructive inspection. The thermoelectric power of metals

Nagy, Peter B.

238

PSPICE-Compatible Equivalent Circuit of Thermoelectric Coolers Simon Lineykin and Sam Ben-Yaakov*  

E-Print Network [OSTI]

. The thermoelectric module (TEM) can be used for cooling, heating, and energy generation [1] - [3]. The objective OF OPERATION Five energy-conversion processes take place in a thermoelectric module: conductive heat transfer of thermodynamics, one can express the energy equilibrium at both sides of the thermoelectric module

239

Thermoelectric materials having porosity  

DOE Patents [OSTI]

A thermoelectric material and a method of making a thermoelectric material are provided. In certain embodiments, the thermoelectric material comprises at least 10 volume percent porosity. In some embodiments, the thermoelectric material has a zT greater than about 1.2 at a temperature of about 375 K. In some embodiments, the thermoelectric material comprises a topological thermoelectric material. In some embodiments, the thermoelectric material comprises a general composition of (Bi.sub.1-xSb.sub.x).sub.u(Te.sub.1-ySe.sub.y).sub.w, wherein 0.ltoreq.x.ltoreq.1, 0.ltoreq.y.ltoreq.1, 1.8.ltoreq.u.ltoreq.2.2, 2.8.ltoreq.w.ltoreq.3.2. In further embodiments, the thermoelectric material includes a compound having at least one group IV element and at least one group VI element. In certain embodiments, the method includes providing a powder comprising a thermoelectric composition, pressing the powder, and sintering the powder to form the thermoelectric material.

Heremans, Joseph P.; Jaworski, Christopher M.; Jovovic, Vladimir; Harris, Fred

2014-08-05T23:59:59.000Z

240

Review of solar thermoelectric energy conversion and analysis of a two cover flat-plate solar collector  

E-Print Network [OSTI]

The process of solar thermoelectric energy conversion was explored through a review of thermoelectric energy generation and solar collectors. Existing forms of flat plate collectors and solar concentrators were surveyed. ...

Hasan, Atiya

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermoelectric generator rtg" 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

Thermoelectric heat exchange element  

DOE Patents [OSTI]

A thermoelectric heat exchange module includes a first substrate including a heat receptive side and a heat donative side and a series of undulatory pleats. The module may also include a thermoelectric material layer having a ZT value of 1.0 or more disposed on at least one of the heat receptive side and the heat donative side, and an electrical contact may be in electrical communication with the thermoelectric material layer.

Callas, James J. (Peoria, IL); Taher, Mahmoud A. (Peoria, IL)

2007-08-14T23:59:59.000Z

242

Concentrated Solar Thermoelectric Power  

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

CONCENTRATING SOLAR POWER PROGRAM REVIEW 2013 Concentrated Solar Thermoelectric Power Principal Investigator: Prof. Gang Chen Massachusetts Institute of Technology Cambridge, MA...

243

Rare earth thermoelectrics  

SciTech Connect (OSTI)

A review is presented of the thermoelectric properties of rare earth compounds: A discussion is presented of the prospects for future improvements in the figure of merit.

Mahan, G.D.

1997-07-01T23:59:59.000Z

244

High Temperature Integrated Thermoelectric Ststem and Materials  

SciTech Connect (OSTI)

The final goal of this project is to produce, by the end of Phase II, an all ceramic high temperature thermoelectric module. Such a module design integrates oxide ceramic n-type, oxide ceramic p-type materials as thermoelectric legs and oxide ceramic conductive material as metalizing connection between n-type and p-type legs. The benefits of this all ceramic module are that it can function at higher temperatures (> 700 C), it is mechanically and functionally more reliable and it can be scaled up to production at lower cost. With this all ceramic module, millions of dollars in savings or in new opportunities recovering waste heat from high temperature processes could be made available. A very attractive application will be to convert exhaust heat from a vehicle to reusable electric energy by a thermoelectric generator (TEG). Phase I activities were focused on evaluating potential n-type and p-type oxide compositions as the thermoelectric legs. More than 40 oxide ceramic powder compositions were made and studied in the laboratory. The compositions were divided into 6 groups representing different material systems. Basic ceramic properties and thermoelectric properties of discs sintered from these powders were measured. Powders with different particles sizes were made to evaluate the effects of particle size reduction on thermoelectric properties. Several powders were submitted to a leading thermoelectric company for complete thermoelectric evaluation. Initial evaluation showed that when samples were sintered by conventional method, they had reasonable values of Seebeck coefficient but very low values of electrical conductivity. Therefore, their power factors (PF) and figure of merits (ZT) were too low to be useful for high temperature thermoelectric applications. An unconventional sintering method, Spark Plasma Sintering (SPS) was determined to produce better thermoelectric properties. Particle size reduction of powders also was found to have some positive benefits. Two composition systems, specifically 1.0 SrO - 0.8 x 1.03 TiO2 - 0.2 x 1.03 NbO2.5 and 0.97 TiO2 - 0.03 NbO2.5, have been identified as good base line compositions for n-type thermoelectric compositions in future module design. Tests of these materials at an outside company were promising using that company's processing and material expertise. There was no unique p-type thermoelectric compositions identified in phase I work other than several current cobaltite materials. Ca3Co4O9 will be the primary p-type material for the future module design until alternative materials are developed. BaTiO3 and rare earth titanate based dielectric compositions show both p-type and n-type behavior even though their electrical conductivities were very low. Further research and development of these materials for thermoelectric applications is planned in the future. A preliminary modeling and optimization of a thermoelectric generator (TEG) that uses the n-type 1.0 SrO - 1.03 x 0.8 TiO2 - 1.03 x 0.2 NbO2.5 was performed. Future work will combine development of ceramic powders and manufacturing expertise at TAM, development of SPS at TAM or a partner organization, and thermoelectric material/module testing, modeling, optimization, production at several partner organizations.

Mike S. H. Chu

2011-06-06T23:59:59.000Z

245

Characterizing the thermal efficiency of thermoelectric modules  

E-Print Network [OSTI]

An experimental setup was designed and utilized to measure the thermoelectric properties as functions of temperature of a commercially available, bismuth telluride thermoelectric module. Thermoelectric modules are solid ...

Phillips, Samuel S

2009-01-01T23:59:59.000Z

246

Vehicular Thermoelectrics: A New Green Technology | Department...  

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

Vehicular Thermoelectrics: A New Green Technology Vehicular Thermoelectrics: A New Green Technology An overview of the DOE activities in vehicular application of thermoelectrics...

247

Determination of Thermoelectric Module Efficiency A Survey  

SciTech Connect (OSTI)

The development of thermoelectrics (TE) for energy conversion is in the transition phase from laboratory research to device development. There is an increasing demand to accurately determine the module efficiency, especially for the power generation mode. For many thermoelectrics, the figure of merit, ZT, of the material sometimes cannot be fully realized at the device level. Reliable efficiency testing of thermoelectric modules is important to assess the device ZT and provide the end-users with realistic values on how much power can be generated under specific conditions. We conducted a general survey of efficiency testing devices and their performance. The results indicated the lack of industry standards and test procedures. This study included a commercial test system and several laboratory systems. Most systems are based on the heat flow meter method and some are based on the Harman method. They are usually reproducible in evaluating thermoelectric modules. However, cross-checking among different systems often showed large errors that are likely caused by unaccounted heat loss and thermal resistance. Efficiency testing is an important area for the thermoelectric community to focus on. A follow-up international standardization effort is planned.

Wang, Hsin [ORNL; McCarty, Robin [Marlow Industries, Inc; Salvador, James R. [GM R& D and Planning, Warren, Michigan; Yamamoto, Atsushi [AIST, Japan; Konig, Jan [Fraunhofer-Institute, Freiburg, Germany

2014-01-01T23:59:59.000Z

248

Cassini RTG Program. Monthly technical progress report, October 30--November 26, 1995  

SciTech Connect (OSTI)

The technical progress achieved during the period 30 October through 26 November, 1995 is described herein. This report is organized by program task structure: (1) spacecraft integration and liaison; (2) engineering support; (3) safety; (4) qualified unicouple production; (5) ETG fabrication, assembly, and test; (6) ground support equipment (GSE); (7) RTG shipping and launch support; (8) designs, reviews, and mission applications; (9) project management, quality assurance, reliability, contract changes, CAGO acquisition (operating funds), and GACO maintenance and repair; and CAGO acquisition (capital funds).

NONE

1995-12-24T23:59:59.000Z

249

Nanostructured Materials for Energy Generation and Storage  

E-Print Network [OSTI]

efficiency of the thermoelectric energy generation and battery storageefficiency of the thermoelectric energy generation and battery storagebattery electrodes suggest that the use of nanostructured materials can substantially improve the thermal management of the batteries and their energy storage efficiency.

Khan, Javed Miller

2012-01-01T23:59:59.000Z

250

Proceedings of the XVII International Conference on Thermoelectrics, Cardiff, UK, p. 151 (2000) Synthesis and thermoelectric properties of some materials with the PbBi4Te7 crystal structure  

E-Print Network [OSTI]

used in thermoelectric modules for cooling and power generation applications. Extensive research hasProceedings of the XVII International Conference on Thermoelectrics, Cardiff, UK, p. 151 (2000) 1 Synthesis and thermoelectric properties of some materials with the PbBi4Te7 crystal structure T. Caillat, C

251

Radioisotope Stirling Generator Options for Pluto Fast Flyby Mission  

SciTech Connect (OSTI)

The preceding paper described conceptual designs and analytical results for five Radioisotope Thermoelectric Generator (RTG) options for the Pluto Fast Flyby (PFF) mission, and the present paper describes three Radioisotope Stirling Generator (RSG) options for the same mission. The RSG options are based on essentially the same radioisotope heat source modules used in previously flown RTGs and on designs and analyses of a 75-watt free-piston Stirling engine produced by Mechanical Technology Incorporated (MTI) for NASA's Lewis Research Center. The integrated system design options presented were generated in a Fairchild Space study sponsored by the Department of Energy's Office of Special Applications, in support of ongoing PFF mission and spacecraft studies that the Jet Propulsion Laboratory (JPL) is conducting for the National Aeronautics and Space Administration (NASA). That study's NASA-directed goal is to reduce the spacecraft mass from its baseline value of 166 kg to ~110 kg, which implies a mass goal of less than 10 kg for a power source able to deliver 69 watts(e) at the end of the 9.2-year mission. In general, the Stirling options were found to be lighter than the thermoelectric options described in the preceding paper. But they are less mature, requiring more development, and entailing greater programmatic risk. The Stirling power system mass ranged from 7.3 kg (well below the 10-kg goal) for a non-redundant system to 11.3 kg for a redundant system able to maintain full power if one of its engines fails. In fact, the latter system could deliver as much as 115 watts(e) if desired by the mission planners. There are 5 copies in the file.

Schock, Alfred

1993-10-01T23:59:59.000Z

252

New nano structure approaches for bulk thermoelectric materials  

E-Print Network [OSTI]

for efficient solid state cooling and power generation, has1,2]. Such solid- state refrigeration and power generationpower by using solar energy [2]. Thermoelectric devices can also serve as a solid

Kim, Jeonghoon

2010-01-01T23:59:59.000Z

253

Nanostructured High-Temperature Bulk Thermoelectric Energy Conversion...  

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

of vehicle to set a baseline of fuel economy gain with supplemental power, i.e. Thermoelectric Generator 6 Technical Accomplishments and Progress: Half- Heusler Devices GoNo-Go...

254

On the thermoelectric magnetic field of spherical and cylindrical inclusions Peter B. Nagy and Adnan H. Nayfeh  

E-Print Network [OSTI]

made of different materials, i.e., materials of different thermoelectric powers, will generate material discriminators used in nondestructive inspection. The thermoelectric power of metals is sensitive of thermoelectric materials characterization is metal sorting.1 However, it is known that under special conditions

Nagy, Peter B.

255

Nanograined half-Heusler semiconductors as advanced thermoelectrics: an ab-initio high-throughput statistical study  

E-Print Network [OSTI]

the thermoelectric effect to scavenge electric power from waste heat has long been an attractive route in the pursuit of sustainable en- ergy generation.1 Despite recent progress, the goal of producing efficient thermoelectricNanograined half-Heusler semiconductors as advanced thermoelectrics: an ab-initio high

Curtarolo, Stefano

256

IEEE TRANSACTIONS ON COMPONENTS AND PACKAGING TECHNOLOGIES, VOL. 32, NO. 2, JUNE 2009 447 Temperature Profile Inside Microscale Thermoelectric  

E-Print Network [OSTI]

Temperature Profile Inside Microscale Thermoelectric Module Acquired Using Near-Infrared Thermoreflectance-scale thermoelectric modules. By determining localized sources of Joule heating, one can identify manufacturing errors and generate design rules that can improve the cooling performance of the thermoelectric device. Index Terms

257

The thermoelectric process  

SciTech Connect (OSTI)

The efficiency of thermoelectric technology today is limited by the properties of available thermoelectric materials and a wide variety of new approaches to developing better materials have recently been suggested. The key goal is to find a material with a large ZT, the dimensionless thermoelectric figure of merit. However, if an analogy is drawn between thermoelectric technology and gas-cycle engines then selecting different materials for the thermoelements is analogous to selecting a different working gas for the mechanical engine. And an attempt to improve ZT is analogous to an attempt to improve certain thermodynamic properties of the working-gas. An alternative approach is to focus on the thermoelectric process itself (rather than on ZT), which is analogous to considering alternate cycles such as Stirling vs. Brayton vs. Rankine etc., rather than merely considering alternative gases. Focusing on the process is a radically different approach compared to previous studies focusing on ZT. Aspects of the thermoelectric process and alternative approaches to efficient thermoelectric conversion are discussed.

Vining, C.B.

1997-07-01T23:59:59.000Z

258

In-line thermoelectric module  

DOE Patents [OSTI]

A thermoelectric module with a plurality of electricity generating units each having a first end and a second end, the units being arranged first end to second end along an in-line axis. Each unit includes first and second elements each made of a thermoelectric material, an electrically conductive hot member arranged to heat one side of the first element, and an electrically conductive cold member arranged to cool another side of the first element and to cool one side of the second element. The hot member, the first element, the cold member and the second element are supported in a fixture, are electrically connected respectively to provide an electricity generating unit, and are arranged respectively in positions along the in-line axis. The individual components of each generating unit and the respective generating units are clamped in their in-line positions by a loading bolt at one end of the fixture and a stop wall at the other end of the fixture. The hot members may have a T-shape and the cold members an hourglass shape to facilitate heat transfer. The direction of heat transfer through the hot members may be perpendicular to the direction of heat transfer through the cold members, and both of these heat transfer directions may be perpendicular to the direction of current flow through the module.

Pento, Robert (Algonquin, IL); Marks, James E. (Glenville, NY); Staffanson, Clifford D. (S. Glens Falls, NY)

2000-01-01T23:59:59.000Z

259

In-Line Thermoelectric Module  

SciTech Connect (OSTI)

A thermoelectric module with a plurality of electricity generating units each having a first end and a second end, the units being arranged first end to second end along an-in-line axis. Each unit includes first and second elements each made of a thermoelectric material, an electrically conductive hot member arranged to heat one side of the first element, and an electrically conductive cold member arranged to cool another side of the first element and to cool one side of the second element. The hot member, the first element, the cold member and the second element are supported in a fixture, are electrically connected respectively to provide an electricity generating unit, and are arranged respectively in positions along the in-line axis. The individual components of each generating unit and the respective generating units are clamped in their in-line positions by a loading bolt at one end of the fixture and a stop wall at the other end of the fixture. The hot members may have a T-shape and the cold members an hourglass shape to facilitate heat transfer. The direction of heat transfer through the hot members may be perpendicular to the direction of heat transfer through the cold members, and both of these heat transfer directions maybe perpendicular to the direction-of current flow through the module.

Pento, Robert; Marks, James E.; Staffanson, Clifford D.

1998-07-28T23:59:59.000Z

260

Automotive Thermoelectric Generators and HVAC  

Broader source: Energy.gov [DOE]

2013 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting

Note: This page contains sample records for the topic "thermoelectric generator rtg" 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

Automotive Thermoelectric Generators and HVAC  

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

technologies including nanostructured interfaces, filled skutterudites, cold-side microfluidics. Practical TE characterization including interface effects and thermal...

262

Increasing Thermoelectric Generation Water Use  

E-Print Network [OSTI]

rights reserved. Water Is a Critical Resource · Fast growing demand for clean, fresh water · Increased and energy planning · More watershed/regional planning · New science and technology to support planning. Solving the problem Requires Science and Technology Monitoring & Measurement Science &Technology

Keller, Arturo A.

263

Bipolar thermoelectric devices  

E-Print Network [OSTI]

The work presented here is a theoretical and experimental study of heat production and transport in bipolar electrical devices, with detailed treatment of thermoelectric effects. Both homojunction and heterojunction devices ...

Pipe, Kevin P. (Kevin Patrick), 1976-

2004-01-01T23:59:59.000Z

264

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....

265

Solar Thermoelectrics Mercouri Kanatzidis,  

E-Print Network [OSTI]

Solar Thermoelectrics Mercouri Kanatzidis, Materials Science Division December 15, 2009 #12;2 Heat #12;13 What is the dot made of? Cook, Kramer #12;14 Nanostructures reduce the lattice thermal

Kanatzidis, Mercouri G

266

Thermoelectric transport in superlattices  

SciTech Connect (OSTI)

The thermoelectric transport properties of superlattices have been studied using an exact solution of the Boltzmann equation. The role of heat transport along the barrier layers, of carrier tunneling through the barriers, of valley degeneracy and of the well width and energy dependences of the carrier-phonon scattering rates on the thermoelectric figure of merit are given. Calculations are given for Bi{sub 2}Te{sub 3} and for PbTe, and the results of recent experiments are discussed.

Reinecke, T.L.; Broido, D.A.

1997-07-01T23:59:59.000Z

267

Thermoelectric Development at Hi-Z Technology  

SciTech Connect (OSTI)

An improved Thermoelectric Generator (TEG) for the Heavy Duty Class Eight Diesel Trucks is under development at Hi-Z Technology. The current TEG is equipped with the improved HZ-14 Thermoelectric module, which features better mechanical properties as well as higher electric power output. Also, the modules are held in place more securely. The TEG is comprised of 72 TE modules, which are capable of producing 1kW of electrical power at 30 V DC during nominal engine operation. Currently the upgraded generator has completed testing in a test cell and starting from August 2001 will be tested on a Diesel truck under typical road and environmental conditions. It is expected that the TEG will be able to supplement the existing shaft driven alternator, resulting in significant fuel saving, generating additional power required by the truck?s accessories. The electronic and thermal properties of bulk materials are altered when they are incorporated into quantum wells. Two-dimensional quantum wells have been synthesized by alternating layers of B4C and B9C in one system and alternating layers of Si and Si0.8Ge0.2 in another system. Such nanostructures are being investigated as candidate thermoelectric materials with high figures of merit (Z). The predicted enhancement is attributed to the confined motion of charge carriers and phonons in the two dimensions and separating them from the ion scattering centers. Multilayer quantum well materials development continues with the fabrication of thicker films, evaluation of various substrates to minimize bypass heat loss, and bonding techniques to minimize high contact resistance. Quantum well thermoelectric devices with N-type Si/Si0.8Ge0.2 and P-type B4C/B9C have been fabricated from these films. The test results generated continue to indicate that much higher thermoelectric efficiencies can be achieved in the quantum wells compared to the bulk materials.

Kushch, Aleksandr

2001-08-05T23:59:59.000Z

268

Rational Synthesis of Ultrathin n-Type Bi2Te3 Nanowires with Enhanced Thermoelectric Properties  

E-Print Network [OSTI]

, which can generate electricity by recovering waste heat or be used as solid-state cooling devices, have-based thermoelectric power generation and solid-state cooling devices with superior performance in a reliableRational Synthesis of Ultrathin n-Type Bi2Te3 Nanowires with Enhanced Thermoelectric Properties

Xu, Xianfan

269

Feasibility of Thermoelectrics for Waste Heat Recovery in Hybrid Vehicles: Preprint  

SciTech Connect (OSTI)

Using advanced materials, thermoelectric conversion of efficiencies on the order of 20% may be possible in the near future. Thermoelectric generators offer potential to increase vehicle fuel economy by recapturing a portion of the waste heat from the engine exhaust and generating electricity to power vehicle accessory or traction loads.

Smith, K.; Thornton, M.

2007-12-01T23:59:59.000Z

270

Prescription to Improve Thermoelectric Efficiency  

E-Print Network [OSTI]

In this work, patterns in the behavior of different classes and types of thermoelectric materials are observed, and an alchemy that could help engineer a highly efficient thermoelectric is proposed. A method based on cross-correlation of Seebeck...

Meka, Shiv Akarsh

2012-07-16T23:59:59.000Z

271

High efficiency radioisotope thermophotovoltaic prototype generator  

SciTech Connect (OSTI)

A radioisotope thermophotovoltaic generator space power system (RTPV) is lightweight, low-cost alternative to the present radioisotope thermoelectric generator system (RTG). The fabrication of such an RTPV generator has recently become feasible as the result of the invention of the GaSb infrared sensitive photovoltaic cell. Herein, the authors present the results of a parametric study of emitters and optical filters in conjuction with existing data on gallium antimonide cells. They compare a polished tungsten emitter with an Erbia selective emitter for use in combination with a simple dielectric filter and a gallium antimonide cell array. They find that the polished tungsten emitter is by itself a very selective emitter with low emissivity beyond 4 microns. Given a gallium antimonide cell and a tungsten emitter, a simple dielectric filter can be designed to transmit radiant energy below 1.7 microns and to reflect radiant energy between 1.7 and 4 microns back to the emitter. Because of the low long wavelength emissivity associated with the polished tungsten emitter, this simple dielectric filter then yields very respectable system performance. Also as a result of the longer wavelength fall-off in the tungsten emissivity curve, the radiation energy peak for a polished tungsten emitter operating at 1300 K shifts to shorter wavelengths relative to the blackbody spectrum so that the radiated energy peak falls right at the gallium antimonide cell bandedge. The result is that the response of the gallium antimonide cell is well matched to a polished tungsten emitter. The authors propose, therefore, to fabricate an operating prototype of a near term radioisotope thermophotovoltaic generator design consisting of a polished tungsten emitter, standard gallium antimonide cells, and a near-term dielectric filter.

Avery, J.E.; Samaras, J.E.; Fraas, L.M.; Ewell, R. [JX Crystals, Inc., Issaquah, WA (United States)

1995-10-01T23:59:59.000Z

272

Multilayer thermoelectric films: A strategy for the enhancement of ZT  

SciTech Connect (OSTI)

The relative efficiency of a thermoelectric material is measured in terms of a dimensionless figure of merit, ZT. Although all known thermoelectric materials are believed to have ZT {le} 1, recent theoretical results predict that thermoelectric devices fabricated as two-dimensional quantum wells (2D QWs) could have ZT {ge} 3. Multilayers with the dimensions of 2D QWs have been synthesized by alternately sputtering Bi{sub 0.9}Sb{sub 0.1} and PbTe{sub 0.8}Se{sub 0.2} onto a moving substrate from a pair of magnetron sources. These materials have been synthesized to test the thermoelectric quantum-well concept and gain insight into relevant transport mechanisms. This work focuses primarily on the scientific issues involved in producing the materials necessary to examine the possibility of enhancing ZT using quantum confinement. The techniques needed to measure the relevant electrical parameters of thermoelectric thin films are developed in this paper. Ultimately, if a quantum well enhancement of thermoelectrics is experimentally observed, devices based on this technology could be used to greatly expand the role of thermoelectrics in power generation and refrigeration.

Wadgner, A.V.; Foreman, R.J.; Summers, L.J.; Barbee, T.W. Jr.; Farmer, J.C.

1995-03-01T23:59:59.000Z

273

A continuum theory of thermoelectric bodies and effective properties of thermoelectric composites  

E-Print Network [OSTI]

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.3 A constitutive model for thermoelectric materials . . . . . . . . . . . . . . . . . . . . 6 2 composites. 1 Introduction Thermoelectric (TE) materials directly convert heat into electric energyA continuum theory of thermoelectric bodies and effective properties of thermoelectric composites

Liu, Liping

274

To be published in the proceedings of the International Conference on Thermoelectrics, Adelaide, Australia 2003 High Performance Multi Barrier Thermionic Devices  

E-Print Network [OSTI]

-of-merit, ZT specifies how "good" the material is for thermoelectric cooling and power generation applications. Widely used thermoelectric material at room temperature is based on Bi2Te3 2 . Heterostructure Integrated. As a concrete example, thermoelectric properties of InGaAs/InAlAs superlattices is studied. Material properties

275

Journal of Physics and Chemistry of Solids Vol 58 p 1119-25 (1997) T Caillat et al Preparation and thermoelectric properties of semiconducting Zn4Sb3  

E-Print Network [OSTI]

-of-the-art thermoelectric materials between Bi2Te3-based alloys and PbTe-based alloys. This material, relatively inexpensive conductivity. Established thermoelectric materials used in power generation can be divided into three and theoretical considerations, several new potentially high performance thermoelectric materials were identified

276

Thermoelectrically cooled water trap  

DOE Patents [OSTI]

A water trap system based on a thermoelectric cooling device is employed to remove a major fraction of the water from air samples, prior to analysis of these samples for chemical composition, by a variety of analytical techniques where water vapor interferes with the measurement process. These analytical techniques include infrared spectroscopy, mass spectrometry, ion mobility spectrometry and gas chromatography. The thermoelectric system for trapping water present in air samples can substantially improve detection sensitivity in these analytical techniques when it is necessary to measure trace analytes with concentrations in the ppm (parts per million) or ppb (parts per billion) partial pressure range. The thermoelectric trap design is compact and amenable to use in a portable gas monitoring instrumentation.

Micheels, Ronald H. (Concord, MA)

2006-02-21T23:59:59.000Z

277

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

E-Print Network [OSTI]

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

Liu, Liping

2012-01-01T23:59:59.000Z

278

Thermoelectric powered wireless sensors for spent fuel monitoring  

SciTech Connect (OSTI)

This paper describes using thermoelectric generators to power wireless sensors to monitor spent nuclear fuel during dry-cask storage. OrigenArp was used to determine the decay heat of the spent fuel at different times during the service life of the dry-cask. The Engineering Equation Solver computer program modeled the temperatures inside the spent fuel storage facility during its service life. The temperature distribution in a thermoelectric generator and heat sink was calculated using the computer program Finite Element Heat Transfer. From these temperature distributions the power produced by the thermoelectric generator was determined as a function of the service life of the dry-cask. In addition, an estimation of the path loss experienced by the wireless signal can be made based on materials and thickness of the structure. Once the path loss is known, the transmission power and thermoelectric generator power requirements can be determined. This analysis estimates that a thermoelectric generator can produce enough power for a sensor to function and transmit data from inside the dry-cask throughout its service life. (authors)

Carstens, T.; Corradini, M.; Blanchard, J. [Dept. of Engineering Physics, Univ. of Wisconsin-Madison, Madison, WI 53706 (United States); Ma, Z. [Dept. of Electrical and Computer Engineering, Univ. of Wisconsin-Madison, Madison, WI 53706 (United States)

2011-07-01T23:59:59.000Z

279

Thermoelectric Conversion of Waste Heat to Electricity in an IC Engine Powered Vehicle  

SciTech Connect (OSTI)

The thermoelectric generator shorting system provides the capability to monitor and short-out individual thermoelectric couples in the event of failure. This makes the series configured thermoelectric generator robust to individual thermoelectric couple failure. Open circuit detection of the thermoelectric couples and the associated short control is a key technique to ensure normal functionality of the TE generator under failure of individual TE couples. This report describes a five-year effort whose goal was the understanding the issues related to the development of a thermoelectric energy recovery device for a Class-8 truck. Likely materials and important issues related to the utility of this generator were identified. Several prototype generators were constructed and demonstrated. The generators developed demonstrated several new concepts including advanced insulation, couple bypass technology and the first implementation of skutterudite thermoelectric material in a generator design. Additional work will be required to bring this system to fruition. However, such generators offer the possibility of converting energy that is otherwise wasted to useful electric power. Uur studies indicate that this can be accomplished in a cost-effective manner for this application.

None

2012-01-31T23:59:59.000Z

280

Advanced Thermoelectric Materials for Efficient Waste Heat Recovery in Process Industries  

SciTech Connect (OSTI)

The overall objective of the project was to integrate advanced thermoelectric materials into a power generation device that could convert waste heat from an industrial process to electricity with an efficiency approaching 20%. Advanced thermoelectric materials were developed with figure-of-merit ZT of 1.5 at 275 degrees C. These materials were not successfully integrated into a power generation device. However, waste heat recovery was demonstrated from an industrial process (the combustion exhaust gas stream of an oxyfuel-fired flat glass melting furnace) using a commercially available (5% efficiency) thermoelectric generator coupled to a heat pipe. It was concluded that significant improvements both in thermoelectric material figure-of-merit and in cost-effective methods for capturing heat would be required to make thermoelectric waste heat recovery viable for widespread industrial application.

Adam Polcyn; Moe Khaleel

2009-01-06T23:59:59.000Z

Note: This page contains sample records for the topic "thermoelectric generator rtg" 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

Summary of the nano-related thermoelectric activities in BGU for the year of 2011  

E-Print Network [OSTI]

energy into electrical energy, plays an important role, particularly for the exploitation of waste heat of thermoelectric (TE) power generation. Alloys of type IV-VI, namely PbTe-, GeTe-, and SnTe- based, with ZT(=2 /)>1Summary of the nano-related thermoelectric activities in BGU for the year of 2011 Dr. Yaniv

Vardi, Amichay

282

REVIEW OF SCIENTIFIC INSTRUMENTS 83, 045116 (2012) Multi-layer thermoelectric-temperature-mapping microbial incubator  

E-Print Network [OSTI]

. [http://dx.doi.org/10.1063/1.4705748] I. INTRODUCTION Thermoelectric (TE) modules are advantageous of current flow- ing through the TE modules, heating and cooling functions of the TE modules can be generatedREVIEW OF SCIENTIFIC INSTRUMENTS 83, 045116 (2012) Multi-layer thermoelectric

Lin, Pei-Chun

283

Green thermoelectrics: Observation and analysis of plant thermoelectric response  

E-Print Network [OSTI]

Plants are sensitive to thermal and electrical effects; yet the coupling of both, known as thermoelectricity, and its quantitative measurement in vegetal systems never were reported. We recorded the thermoelectric response of bean sprouts under various thermal conditions and stress. The obtained experimental data unambiguously demonstrate that a temperature difference between the roots and the leaves of a bean sprout induces a thermoelectric voltage between these two points. Basing our analysis of the data on the force-flux formalism of linear response theory, we found that the strength of the vegetal equivalent to the thermoelectric coupling is one order of magnitude larger than that in the best thermoelectric materials. Experimental data also show the importance of the thermal stress variation rate in the plant's electrophysiological response. Therefore, thermoelectric effects are sufficiently important to partake in the complex and intertwined processes of energy and matter transport within plants.

Goupil, C; Khamsing, A; Apertet, Y; Bouteau, F; Mancuso, S; Patino, R; Lecoeur, Ph

2015-01-01T23:59:59.000Z

284

Development of Thermoelectric Technology for Automotive Waste...  

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

Thermoelectric Technology for Automotive Waste Heat Recovery Development of Thermoelectric Technology for Automotive Waste Heat Recovery Overview and status of project to develop...

285

Development of Thermoelectric Technology for Automotive Waste...  

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

Thermoelectric Technology for Automotive Waste Heat Recovery Development of Thermoelectric Technology for Automotive Waste Heat Recovery Presentation from the U.S. DOE Office of...

286

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...

287

Vehicle Technologies Office Merit Review 2014: Thermoelectric...  

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

Thermoelectric Waste Heat Recovery Program for Passenger Vehicles Vehicle Technologies Office Merit Review 2014: Thermoelectric Waste Heat Recovery Program for Passenger Vehicles...

288

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

289

From Heat to Electricity: How "nano" Saved Thermoelectrics  

E-Print Network [OSTI]

· Utilities · Chemical plants Space power Remote Power Generation Solar energy Geothermal power generationFrom Heat to Electricity: How "nano" Saved Thermoelectrics Sponsored by Mercouri Kanatzidis brittle materials strong Conclusions #12;Heat to Electrical Energy Directly Up to 20% conversion

Kanatzidis, Mercouri G

290

TECHNOMETRICS@, VOL. 20, NO. 2, MAY 1978 A Bayesian Model for Determiningthe Optimal Test  

E-Print Network [OSTI]

the case of a fuel container of a radioisotope thermoelectric generator (RTG) system, which is the power supply for a space satel- lite, The radioisotope fuel container is designed to withstand a certain impact

Waterman, Michael S.

291

A Study of Heat Sink Performance in Air and Soil for Use in a Thermoelectric Energy Harvesting Device  

E-Print Network [OSTI]

A Study of Heat Sink Performance in Air and Soil for Use in a Thermoelectric Energy Harvesting of a thermoelectric generator is to exploit the natural temperature difference between the air and the soil to generate small amounts of electrical energy. Since the conversion efficiency of even the best

292

High Heat Flux Thermoelectric Module Using Standard Bulk Material...  

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

Heat Flux Thermoelectric Module Using Standard Bulk Material High Heat Flux Thermoelectric Module Using Standard Bulk Material Presents high heat flux thermoelectric module design...

293

Development of a Thermoelectric Device for an Automotive Zonal...  

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

a Thermoelectric Device for an Automotive Zonal HVAC System Development of a Thermoelectric Device for an Automotive Zonal HVAC System Presents development of a thermoelectric...

294

NSF/DOE Thermoelectric Partnership: Inorganic-Organic Hybrid...  

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

Inorganic-Organic Hybrid Thermoelectrics NSFDOE Thermoelectric Partnership: Inorganic-Organic Hybrid Thermoelectrics 2011 DOE Hydrogen and Fuel Cells Program, and Vehicle...

295

Nanocomposites of Semimetallic ErAs Nanoparticles Epitaxially Embedded within InGaAlAs-based Semiconductors for Thermoelectric Materials  

E-Print Network [OSTI]

GaAlAs-based Semiconductors for Thermoelectric Materials J.M.O. Zide', G. Zeng2, J.H. Bahk2, W. Kim3, S. L. Singer3, D array based on these materials for thermoelectric power generation; a power density > 1 W/cm2 is demonstrated with a temperature gradient of 120°C. Solid-state thermionics Efficient thermoelectric materials

296

Thermal Energy Harvesting with Thermoelectrics for Self-powered Sensors: With Applications to Implantable Medical Devices, Body Sensor Networks and Aging in Place  

E-Print Network [OSTI]

6! 1.4. Thermoelectric Energy Harvesting for BiomedicalBiomechanical Energy Harvesting: Generating ElectricityP. K. Wright, “Energy Harvesting - A Systems Perspective,”

Chen, Alic

2011-01-01T23:59:59.000Z

297

High performance thermoelectric nanocomposite device  

DOE Patents [OSTI]

A thermoelectric device includes a nanocomposite material with nanowires of at least one thermoelectric material having a predetermined figure of merit, the nanowires being formed in a porous substrate having a low thermal conductivity and having an average pore diameter ranging from about 4 nm to about 300 nm.

Yang, Jihui (Lakeshore, CA); Snyder, Dexter D. (Birmingham, MI)

2011-10-25T23:59:59.000Z

298

GPHS-RTGs in support of the Cassini RTG Program. Final technical report, January 11, 1991--April 30, 1998  

SciTech Connect (OSTI)

As noted in the historical summary, this program encountered a number of changes in direction, schedule, and scope over the period 11 January 1991 to 31 December 1998. The report provides a comprehensive summary of all the varied aspects of the program over its seven and a quarter years, and highlights those aspects that provide information beneficial to future radioisotope programs. In addition to summarizing the scope of the Cassini GPHS-RTG Program provided as background, the introduction includes a discussion of the scope of the final report and offers reference sources for information on those topics not covered. Much of the design heritage of the GPHS-RTG comes from the Multi-Hundred Watt (MHW) RTGs used on the Lincoln Experimental Satellites (LES) 8/9 and Voyager spacecraft. The design utilized for the Cassini program was developed, in large part, under the GPHS-RTG program which produced the Galileo and Ulysses RTGs. Reports from those programs included detailed documentation of the design, development, and testing of converter components and full converters that were identical to, or similar to, components used in the Cassini program. Where such information is available in previous reports, it is not repeated here.

NONE

1998-08-01T23:59:59.000Z

299

Thermoelectric system for an engine  

DOE Patents [OSTI]

An internal combustion engine that includes a block, a cylinder head having an intake valve port and exhaust valve port formed therein, a piston, and a combustion chamber defined by the block, the piston, and the head. At least one thermoelectric device is positioned within either or both the intake valve port and the exhaust valve port. Each of the valves is configured to move within a respective intake and exhaust valve port thereby causing said valves to engage the thermoelectric devices resulting in heat transfer from the valves to the thermoelectric devices. The intake valve port and exhaust valve port are configured to fluidly direct intake air and exhaust gas, respectively, into the combustion chamber and the thermoelectric device is positioned within the intake valve port, and exhaust valve port, such that the thermoelectric device is in contact with the intake air and exhaust gas.

Mcgilvray, Andrew N.; Vachon, John T.; Moser, William E.

2010-06-22T23:59:59.000Z

300

Novel thermoelectric materials development, existing and potential applications, and commercialization routes  

E-Print Network [OSTI]

Thermoelectrics (TE) are devices which can convert heat in the form of a temperature gradient into electricity, or alternatively generate and absorb heat when an electrical current is run through them. It was established ...

Bertreau, Philippe

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermoelectric generator rtg" 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

Geek-Up[6.10.2011]: Thermoelectrics' Great Power, Key Ingredient in Bone's Nanostructure  

Broader source: Energy.gov [DOE]

Advanced thermoelectric materials could be used to develop vehicle exhaust systems that convert exhaust heat into electricity, concentrate solar energy for power generation and recover waste heat from industrial processes.

302

Effect of Fuel and Design Options on RTG Performance versus PFF Power Demand  

SciTech Connect (OSTI)

Paper presented at the 29th IECEC in Monterey, CA in August 1994. The present paper confines its attention to the relatively conservative option employing standard thermoelectric unicouples, since that may be the only one flight-ready for the projected PFF launch in 2001. There are four copies in the file; also a copy in the ESD files. Included in the file are two previous documents with the same title dated 4/18/1994.

Schock, Alfred; Or, Chuen T

1994-08-01T23:59:59.000Z

303

Thermoelectric properties of chalcopyrite type CuGaTe2 and chalcostibite CuSbS2 Vijay Kumar Gudelli, V. Kanchana, G. Vaitheeswaran, A. Svane, and N. E. Christensen  

E-Print Network [OSTI]

of zT ¼ 1.4, confirming that CuGaTe2 is a promising material for high temperature thermoelectric and concentration suggests that CuSbS2 will be a good thermoelectric material at low temperatures, similarly Thermoelectric (TE) materials with potential applica- tions within power generation and refrigeration have repre

Svane, Axel Torstein

304

Develop Thermoelectric Technology for Automotive Waste Heat Recovery...  

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

More Documents & Publications Development of Thermoelectric Technology for Automotive Waste Heat Recovery Development of Thermoelectric Technology for Automotive Waste Heat...

305

NSF/DOE Thermoelectrics Partnership: Purdue ? GM Partnership...  

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

Partnership: Automotive Thermoelectric Modules with Scalable Thermo- and Electro-Mechanical Interfaces NSFDOE Thermoelectics Partnership: Thermoelectrics for Automotive Waste...

306

NSF/DOE Thermoelectics Partnership: Thermoelectrics for Automotive...  

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

Thermoelectics Partnership: Thermoelectrics for Automotive Waste Heat Recovery NSFDOE Thermoelectics Partnership: Thermoelectrics for Automotive Waste Heat Recovery 2011 DOE...

307

Potential of Thermoelectrics forOccupant Comfort and Fuel Efficiency...  

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

Documents & Publications Vehicle Fuel Economy Improvement through Thermoelectric Waste Heat Recovery Caterpillar Diesel Racing: Yesterday & Today Thermoelectric Conversion of...

308

Overview of industry interest in new thermoelectric materials  

SciTech Connect (OSTI)

The technology base for air conditioning, refrigeration, component cooling below ambient temperatures and power generation will be required to meet several new challenges. The main lines of these challenges will be presented in a way which relates them to the several new thermoelectric materials and materials engineering options being pursued by the research community. The potential benefits of thermoelectric devices are only partially met by enhancing the figure of merit ZT, the nature of the design challenge and the resulting systems approach are presented. The research and the industry are entering into a new era.

Lyon, H.B. Jr.

1997-07-01T23:59:59.000Z

309

Proposal for a phase-coherent thermoelectric transistor  

SciTech Connect (OSTI)

Identifying materials and devices which offer efficient thermoelectric effects at low temperature is a major obstacle for the development of thermal management strategies for low-temperature electronic systems. Superconductors cannot offer a solution since their near perfect electron-hole symmetry leads to a negligible thermoelectric response; however, here we demonstrate theoretically a superconducting thermoelectric transistor which offers unparalleled figures of merit of up to ?45 and Seebeck coefficients as large as a few mV/K at sub-Kelvin temperatures. The device is also phase-tunable meaning its thermoelectric response for power generation can be precisely controlled with a small magnetic field. Our concept is based on a superconductor-normal metal-superconductor interferometer in which the normal metal weak-link is tunnel coupled to a ferromagnetic insulator and a Zeeman split superconductor. Upon application of an external magnetic flux, the interferometer enables phase-coherent manipulation of thermoelectric properties whilst offering efficiencies which approach the Carnot limit.

Giazotto, F., E-mail: giazotto@sns.it [NEST, Instituto Nanoscienze-CNR and Scuola Normale Superiore, I-56127 Pisa (Italy); Robinson, J. W. A., E-mail: jjr33@cam.ac.uk [Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS (United Kingdom); Moodera, J. S. [Department of Physics and Francis Bitter Magnet Lab, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States); Bergeret, F. S., E-mail: sebastian-bergeret@ehu.es [Centro de Física de Materiales (CFM-MPC), Centro Mixto CSIC-UPV/EHU, Manuel de Lardizabal 4, E-20018 San Sebastián (Spain); Donostia International Physics Center (DIPC), Manuel de Lardizabal 5, E-20018 San Sebastián (Spain)

2014-08-11T23:59:59.000Z

310

Proceedings of the XVI International Conference on Thermoelectrics, Dresden, Germany, August 26-29, 1997 Skutterudites: An Update  

E-Print Network [OSTI]

be meaningful for near room temperature applications [1], thermoelectric power generators which could operate technologies. This is true in particular for high power (over 200 W) automobile waste heat recovery and spaceProceedings of the XVI International Conference on Thermoelectrics, Dresden, Germany, August 26

311

Thermoelectric materials -- New directions and approaches. Materials Research Society symposium proceedings, Volume 478  

SciTech Connect (OSTI)

Thermoelectric materials are utilized in a wide variety of applications related to solid-state refrigeration or small-scale power generation. Thermoelectric cooling is an environmentally friendly method of small-scale cooling in specific applications such as cooling computer chips and laser diodes. Thermoelectric materials are used in a wide range of applications from beverage coolers to power generation for deep-space probes such as the Voyager missions. Over the past thirty years, alloys based on the Bi-Te systems {l{underscore}brace}(Bi{sub 1{minus}x}Sb{sub x}){sub 2} (Te{sub 1{minus}x}Se{sub x}){sub 3}{r{underscore}brace} and Si{sub 1{minus}x}Ge{sub x} systems have been extensively studied and optimized for their use as thermoelectric materials to perform a variety of solid-state thermoelectric refrigeration and power generation tasks. Despite this extensive investigation of the traditional thermoelectric materials, there is still a substantial need and room for improvement, and thus, entirely new classes of compounds will have to be investigated. Over the past two-to-three years, research in the field of thermoelectric materials has been undergoing a rapid rebirth. The enhanced interest in better thermoelectric materials has been driven by the need for much higher performance and new temperature regimes for thermoelectric devices in many applications. The essence of a good thermoelectric is given by the determination of the material's dimensionless figure of merit, ZT = ({alpha}{sup 2}{sigma}/{lambda})T, where {alpha} is the Seebeck coefficient, {sigma} the electrical conductivity and {lambda} the total thermal conductivity. The best thermoelectric materials have a value of ZT = 1. This ZT = 1 has been an upper limit for more than 30 years, yet no theoretical or thermodynamic reason exits for why it can not be larger. The focus of the symposium is embodied in the title, Thermoelectric Materials: New Directions and Approaches. Many of the researchers in the field believe that future advances in thermoelectric applications will come through research in new materials. The authors have many new methods of materials synthesis and much more rapid characterization of these materials than were available 20--30 years ago. They have tried to focus the symposium on new directions and new materials such as skutterudites, quantum well and superlattice structures, new metal chalcogenides, rare earth systems, and quasicrystals. Other new materials are also presented in these proceedings. Separate abstracts were prepared for all the papers in this volume.

Tritt, T.M.; Kanatzidis, M.G.; Lyon, H.B. Jr.; Mahan, G.D. [eds.

1997-07-01T23:59:59.000Z

312

Radioisotope Thermophotovoltaic (RTPV) Generator and Its Application to the Pluto Fast Flyby Mission  

SciTech Connect (OSTI)

This paper describes the results of a DOE-sponsored design study of a radioisotope thermophotovoltaic generator. Instead of conducting a generic study, it was decided to focus the design by directing it at a specific space mission, Pluto Fast Flyby (PFF). That mission, under study by JPL, envisages a direct eight-year flight to Pluto (the only unexplored planet in the solar system), followed by comprehensive mapping, surface composition, and atmospheric structure measurements during a brief flyby of the planet and its moon Charon, and transmission of the recorded science data to Earth during a one-year post-encounter cruise. Because of Pluto's long distance from the sun (30-50 A.U.) and the mission's large energy demand, JPL has baselined the use of a radioisotope power system for the PFF spacecraft. The chief advantage of Radioisotope Thermophotovoltaic (RTPV) power systems over current Radioisotope Thermoelectric Generators (RTGs) is their much higher conversion efficiency, which greatly reduces the mass and cost of the required radioisotope heat source. Those attributes are particularly important for the PFF mission, which - like all NASA missions under current consideration - is severely mass- and cost-limited. The paper describes the design of the radioisotope heat source, the thermophotovoltaic converter, and the heat rejection system; and presents the results of the thermal, electrical, and structural analysis and the design optimization of the integrated RTPV system. It briefly summarizes the RTPV system's current technology status, and lists a number of factors that my greatly reduce the need for long-term tests to demonstrate generator lifetime. Our analytical results show very substantial performance improvements over an RTG designed for the same mission, and suggest that the RTPV generator, when developed by DOE and/or NASA, would be quite valuable not only for the PFF mission but also for other future missions requiring small, long-lived, low-mass generators. There is a duplicate copy.

Schock, Alfred; Mukunda, Meera; Or, Chuen T; Kumar, Vasanth; Summers, G.

1994-01-16T23:59:59.000Z

313

Thermoelectric device characterization and solar thermoelectric system modeling  

E-Print Network [OSTI]

Recent years have witnessed a trend of rising electricity costs and an emphasis on energy efficiency. Thermoelectric (TE) devices can be used either as heat pumps for localized environmental control or heat engines to ...

Muto, Andrew (Andrew Jerome)

2011-01-01T23:59:59.000Z

314

ErAs:,,InGaAs...1-x,,InAlAs...x alloy power generator modules Gehong Zeng,a  

E-Print Network [OSTI]

p-type ErAs:InGaAs alloy thermoelectric elements. The thermoelectric properties of the materials power and efficiency of a thermoelectric generator module depend largely on the material. Thermoelectric properties can be improved by introducing nanometer scale structure into materials.2 In this way

Bowers, John

315

Effect of Heat Exchanger Material and Fouling on Thermoelectric Exhaust Heat Recovery  

SciTech Connect (OSTI)

This study is conducted in an effort to better understand and improve the performance of thermoelectric heat recovery systems for automotive use. For this purpose an experimental investigation of thermoelectrics in contact with clean and fouled heat exchangers of different materials is performed. The thermoelectric devices are tested on a bench-scale thermoelectric heat recovery apparatus that simulates automotive exhaust. The thermoelectric apparatus consists of a series of thermoelectric generators contacting a hot-side and a cold-side heat exchanger. The thermoelectric devices are tested with two different hot-side heat exchanger materials, stainless steel and aluminum, and at a range of simulated exhaust gas flowrates (40 to 150 slpm), exhaust gas temperatures (240 C and 280 C), and coolant-side temperatures (40 C and 80 C). It is observed that for higher exhaust gas flowrates, thermoelectric power output increases while overall system efficiency decreases. Degradation of the effectiveness of the EGR-type heat exchangers over a period of driving is also simulated by exposing the heat exchangers to diesel engine exhaust under thermophoretic conditions to form a deposit layer. For the fouled EGR-type heat exchangers, power output and system efficiency is observed to be significantly lower for all conditions tested. The study found, however, that heat exchanger material is the dominant factor in the ability of the system to convert heat to electricity with thermoelectric generators. This finding is thought to be unique to the heat exchangers used for this study, and not a universal trend for all system configurations.

Love, Norman [University of Texas, El Paso; Szybist, James P [ORNL; Sluder, Scott [ORNL

2011-01-01T23:59:59.000Z

316

Thermoelectric energy conversion using nanostructured materials  

E-Print Network [OSTI]

High performance thermoelectric materials in a wide range of temperatures are essential to broaden the application spectrum of thermoelectric devices. This paper presents experiments on the power and efficiency characteristics ...

Chen, Gang

317

Vehicle Fuel Economy Improvement through Thermoelectric Waste...  

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

Recovery Vehicle Fuel Economy Improvement through Thermoelectric Waste Heat Recovery 2005 Diesel Engine Emissions Reduction (DEER) Conference Presentations and Posters...

318

Recent Theoretical Results for Advanced Thermoelectric Materials...  

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

Materials Recent Theoretical Results for Advanced Thermoelectric Materials Transport theory and first principles calculations applied to oxides, chalcogenides and...

319

Development testing of the two-watt RTG heat source and Hastelloy-S/T-111 alloy compatibility studies  

SciTech Connect (OSTI)

The two-watt radioisotope thermoelectric generator heat source capsules were tested to determine their survivability under extreme environmental conditions: high external pressure, high impact, and high internal pressure. Test results showed that the capsules could withstand external pressures of 1,000 bars and impacts at velocities near 150 meters per second. However, the results of the internal pressure tests (stress-rupture) were not so favorable, possibly because of copper contamination, leading to a recommendation for additional testing. A material compatibility study examined the use of Hastelloy-S as a material to clad the tantalum strength member of the two-watt radioisotopic heat source. Test capsules were subjected to high temperatures for various lengths of time, then cross sectioned and examined with a scanning electron microscope. Results of the study indicate that Hastelloy-S would be compatible with the underlying alloy, not only at the normal operating temperatures of the heat source, but also when exposed to the much higher temperatures of a credible accident scenario.

Howell, E.I.; Teaney, P.E.

1993-09-29T23:59:59.000Z

320

AbstractAbstract Improving efficiency of thermoelectric  

E-Print Network [OSTI]

-classical transport models used to predict ZT can effectively predict thermoelectric performance of bulk materials Material PerformanceThermoelectric Material Performance 0 0.5 1 1.5 2 2.5 3 1950 1960 1970 1980 1990 2000AbstractAbstract · Improving efficiency of thermoelectric energy conversion devices is a major

Walker, D. Greg

Note: This page contains sample records for the topic "thermoelectric generator rtg" 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

CONFERENCE PROCEEDINGS Low-dimensional thermoelectric materials  

E-Print Network [OSTI]

CONFERENCE PROCEEDINGS Low-dimensional thermoelectric materials M. S. Dresselhaus Department of low dimensional thermoelectric materials for enhanced performance is reviewed, with particular-dimensional thermoelectric material is discussed. © 1999 American Institute of Physics. S1063-7834 99 00105-7 Professor Abram

Cronin, Steve

322

Measurements and Standards for Thermoelectric Materials  

E-Print Network [OSTI]

Measurements and Standards for Thermoelectric Materials CERAMICS Our goal is to develop standard, electrical conductivity, thermal conductivity) for thin film and bulk thermoelectric materials to enable the commercialization of these materials. Objective Impact and Customers · Thermoelectric SRMs and measurement methods

323

Improved Thermoelectric Devices: Advanced Semiconductor Materials for Thermoelectric Devices  

SciTech Connect (OSTI)

Broad Funding Opportunity Announcement Project: Phononic Devices is working to recapture waste heat and convert it into usable electric power. To do this, the company is using thermoelectric devices, which are made from advanced semiconductor materials that convert heat into electricity or actively remove heat for refrigeration and cooling purposes. Thermoelectric devices resemble computer chips, and they manage heat by manipulating the direction of electrons at the nanoscale. These devices aren’t new, but they are currently too inefficient and expensive for widespread use. Phononic Devices is using a high-performance, cost-effective thermoelectric design that will improve the device’s efficiency and enable electronics manufacturers to more easily integrate them into their products.

None

2009-12-11T23:59:59.000Z

324

Design Modifications for Increasing the BOm and EOM Power Output and Reducing the Size and Mass of RTG for the Pluto Mission  

SciTech Connect (OSTI)

Paper presented at the 29th IECEC in Monterey, CA in August 1994. A companion paper analyzed the effect on source modules for three specific fuel options, and compared the predicted power output with JPL's latest goals for the Pluto Fast Flyby (PFF) mission. The results showed that a 5-module RTG cannot fully meet JPL's goals with any of the available fuels; and that a 6-module RTG more than meets those goals with Russian fuel, almost meets them with U.S. (Cassini-type) fuel, but still falls far short of meeting them with the depleted fuel from the aged (1982) Galileo spare RTG. The inadequacy of the aged fuel was disappointing,because heat source modules made from it already exist, and their use in PFF could result in substantial cost savings. The present paper describes additional analyses which showed that a six-module RTG with the aged fuel can meet JPL's stipulated power margin with a relatively simple design modification, that a second design modification makes it possible to recover all of the mass and size penalty for going from five to six heat source modules, and that a third modification could raise the EOM power margin to 16%.

Schock, Alfred; Or, Chuen T; Kumar, Vasanth

1994-08-01T23:59:59.000Z

325

Design Modifications for Increasing the BOM and EOM Power Output and Reducing the Size and Mass of RTG for the Pluto Mission  

SciTech Connect (OSTI)

A companion paper analyzed the effect on source modules for three specific fuel options, and compared the predicted power output with JPL's latest goals for the Pluto Fast Flyby (PFF) mission. The results showed that a 5-module RTG cannot fully meet JPL's goals with any of the available fuels; and that a 6-module RTG more than meets those goals with Russian fuel, almost meets them with U.S. (Cassini-type) fuel, but still falls far short of meeting them with the depleted fuel from the aged (1982) Galileo spare RTG. The inadequacy of the aged fuel was disappointing,because heat source modules made from it already exist, and their use in PFF could result in substantial cost savings. The present paper describes additional analyses which showed that a six-module RTG with the aged fuel can meet JPL's stipulated power margin with a relatively simple design modification, that a second design modification makes it possible to recover all of the mass and size penalty for going from five to six heat source modules, and that a third modification could raise the EOM power margin to 16%. There are four copies in the file. Cross Reference ESD Files FSC-ESD-217-94-531 (CID #8572)

Schock, Alfred; Or, Chuen T; Kumar, Vasanth

1994-06-01T23:59:59.000Z

326

Nanostructured Thermoelectric Materials: From Superlattices to Nanocomposites Ronggui Yang1  

E-Print Network [OSTI]

Nanostructured Thermoelectric Materials: From Superlattices to Nanocomposites Ronggui Yang1. Materials with a large thermoelectric figure of merit can be used to develop efficient solid-state devices nanocomposites, aiming at developing high efficiency thermoelectric energy conversion materials. 1. Introduction

Chen, Gang

327

Role of anisotropy in noncontacting thermoelectric materials characterization  

E-Print Network [OSTI]

Role of anisotropy in noncontacting thermoelectric materials characterization Adnan H. Nayfeh by the intrinsic thermoelectric anisotropy and inhomogeneity of the material to be inspected. This article presents for non- destructive evaluation NDE and materials characterization. Most existing thermoelectric NDE

Nagy, Peter B.

328

Phase Transition Enhanced Thermoelectrics From the Resnick Sustainability Institute  

E-Print Network [OSTI]

class of thermoelectric materials, mixed ion-electron conductors. It examines a new method thermoelectric material, Cu2 Se, that shows enhanced efficiency near its structural phase transition temperature and enhancing the thermoelectric effect. Via material engineering, including electrochemical investigations

329

Electron and Phonon Engineering in Nanostructured Thermoelectric Materials Zhifeng Ren  

E-Print Network [OSTI]

2.00pm Electron and Phonon Engineering in Nanostructured Thermoelectric Materials Zhifeng Ren Department of Physics, Boston College, Chestnut Hill, Massachusetts Abstract Thermoelectric materials a successful case for potentially large scale application using thermoelectric materials. Biography Dr Zhifeng

Levi, Anthony F. J.

330

The thermoelectric properties of Ge/SiGe modulation doped superlattices A. Samarelli, L. Ferre Llin, S. Cecchi, J. Frigerio, T. Etzelstorfer et al.  

E-Print Network [OSTI]

. [http://dx.doi.org/10.1063/1.4811228] I. INTRODUCTION Thermoelectric generators use the Seebeck effect to con- vert thermal energy into electrical energy. Since waste heat is abundant, there is renewed,3 The major use of thermoelectric materials is as heat pumps for cooling applications where the Peltier effect

Hague, Jim

331

Skutterudite Thermoelectric Generator For Automotive Waste Heat...  

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

Mark Verbrugge GM Global Powertrain & Engineering: Joshua Cowgill Jennifer Stanek Stuart Smith External R & D Partners: Marlow Industries Oak Ridge National Laboratory Future Tech...

332

Thermoelectric Generator Development for Automotive Waste Heat...  

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

Directions in Engine-Efficiency and Emissions Research (DEER) Conference in Detroit, MI, September 27-30, 2010. deer10meisner.pdf More Documents & Publications Advanced...

333

Thermoelectric Generator Performance for Passenger Vehicles  

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

modeling and architecture evaluation * Phase 2: Subsystem design, build and bench test * Phase 3: System integration. Planar configuration TEG with primary HEX and secondary...

334

Integrated Design and Manufacturing of Thermoelectric Generator...  

Office of Environmental Management (EM)

Recovery Vehicles Home About Vehicle Technologies Office Plug-in Electric Vehicles & Batteries Fuel Efficiency & Emissions Alternative Fuels Modeling, Testing, Data & Results...

335

Thermoelectric Generator (TEG) Fuel Displacement Potential using...  

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

5, and 7 calculated by recording exhaust and coolant temperatures entering individual modules. is the figure of merit for the TEG Material. 10 From John W Fairbanks, 'Automotive...

336

High-Temperature Solar Thermoelectric Generators (STEG)  

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

efficiency using JPL module Concentrated STEG demonstration will use NREL's high-flux solar furnace (HFSF) to achieve required levels of optical concentration. 15 Baranowski et...

337

The Industrialization of Thermoelectric Power Generation Technology |  

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 |Energy Usage »of EnergyThe Energy Department Feeds11, 2008 ThePerformancePMof

338

Thermoelectric Generator (TEG) Fuel Displacement Potential using  

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 |Energy Usage »of EnergyThe EnergyDepartment ofPowered Vehicle |

339

High-Temperature Solar Thermoelectric Generators (STEG)  

Broader source: Energy.gov [DOE]

This presentation was delivered at the SunShot Concentrating Solar Power (CSP) Program Review 2013, held April 23–25, 2013 near Phoenix, Arizona.

340

Waste Heat Recovery Opportunities for Thermoelectric Generators |  

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 |Energy Usage »of| Department of EnergyDepartmentDepartment ofof EnergyMotion

Note: This page contains sample records for the topic "thermoelectric generator rtg" 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

1 Copyright 2011 by ASME EXERGY ANALYSIS AND ENTROPY GENERATION MINIMIZATION OF  

E-Print Network [OSTI]

) are designed to become smaller and thinner at the same time, the thermoelectric material can be saved by nearly1 Copyright © 2011 by ASME EXERGY ANALYSIS AND ENTROPY GENERATION MINIMIZATION OF THERMOELECTRIC Stirling engines, etc., authors previously reported that thermoelectric (TE) can be a cost-effective device

342

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...

343

Modeling study of thermoelectric SiGe nanocomposites  

E-Print Network [OSTI]

Nanocomposite thermoelectric materials have attracted much attention recently due to experimental demonstrations of improved thermoelectric properties over those of the corresponding bulk material. In order to better ...

Minnich, Austin Jerome

344

Combustion Exhaust Gas Heat to Power usingThermoelectric Engines...  

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

Solutions Combustion Exhaust Gas Heat to Power using Thermoelectric Engines John LaGrandeur October 5, 2011 Advanced Thermoelectric Solutions - 1 - Market motivation based on CO 2...

345

Combustion Exhaust Gas Heat to Power Using Thermoelectric Engines...  

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

Combustion Exhaust Gas Heat to Power Using Thermoelectric Engines Combustion Exhaust Gas Heat to Power Using Thermoelectric Engines Discusses a novel TEG which utilizes a...

346

Thermoelectrics: From Space Power Systems to Terrestrial Waste...  

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

Thermoelectrics: From Space Power Systems to Terrestrial Waste Heat Recovery Applications Thermoelectrics: From Space Power Systems to Terrestrial Waste Heat Recovery Applications...

347

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...

348

Overview of Research on Thermoelectric Materials and Devices...  

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

Research on Thermoelectric Materials and Devices in China Overview of Research on Thermoelectric Materials and Devices in China An overview presentation of R&D projects on...

349

New nano structure approaches for bulk thermoelectric materials  

E-Print Network [OSTI]

in bulk thermoelectric materials", M. Mater. Res. Soc.Thermoelectricity", Materials Reserach Society Symposium,Johnson, D. C. , Eds. Materials Research Society: Boston,

Kim, Jeonghoon

2010-01-01T23:59:59.000Z

350

Innovative Nano-structuring Routes for Novel ThermoelectricMaterials...  

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

Nano-structuring Routes for Novel Thermoelectric Materials;Phonon Blocking & DOS Engineering Innovative Nano-structuring Routes for Novel Thermoelectric Materials;Phonon Blocking &...

351

Thermoelectric HVAC and Thermal Comfort Enablers for Light-Duty...  

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

Thermoelectric HVAC and Thermal Comfort Enablers for Light-Duty Vehicle Applications Thermoelectric HVAC and Thermal Comfort Enablers for Light-Duty Vehicle Applications 2012 DOE...

352

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

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

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

353

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

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

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

354

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...

355

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

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

by the Application of Advanced Thermoelectric Systems Implemented in a Hybrid Configuration Thermoelectric Conversion of Waste Heat to Electricity in an IC Engine Powered Vehicle...

356

Thermoelectric Waste Heat Recovery Program for Passenger Vehicles...  

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

Thermoelectric Waste Heat Recovery Program for Passenger Vehicles Thermoelectric Waste Heat Recovery Program for Passenger Vehicles 2013 DOE Hydrogen and Fuel Cells Program and...

357

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...

358

An Overview of Thermoelectric Waste Heat Recovery Activities...  

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

An Overview of Thermoelectric Waste Heat Recovery Activities in Europe An Overview of Thermoelectric Waste Heat Recovery Activities in Europe An overview presentation of R&D...

359

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

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

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

360

Combustion Synthesis of Doped Thermoelectric Oxides  

SciTech Connect (OSTI)

Self-propagating high-temperature synthesis (SHS) was used to prepare silver doped calcium cobaltates (Ca1.24- xAgxCo1.62O3.86, x = 0.03 - 0.12) powders. SHS is a simple and economic process to synthesize ceramic materials with minimum energy requirements. The heat generated by the SHS reaction can sustain the propagation of the reaction front and convert reactants to desired products. The effect of doping level on thermoelectric properties was investigated in this study. Results show the substitution of calcium by silver decreases the thermal conductivity significantly. XRD and surface area measurements show synthesized powders are phase pure and have large specific surface areas.

Selig, Jiri [Lamar University; Lin, Sidney [Lamar University; Lin, Hua-Tay [ORNL; Johnson, D Ray [ORNL

2012-01-01T23:59:59.000Z

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


361

Probabilistic Mechanical Reliability Prediction of Thermoelectric Legs  

SciTech Connect (OSTI)

The probability of failure, Pf, for various square-arrayed thermoelectric device designs using bismuth telluride, lead telluride, or skutterudite thermoelectric materials were estimated. Only volume- or bulk-based Pf analysis was considered in this study. The effects of the choice of the thermoelectric material, the size of the leg array, the height of the thermoelectric legs, and the boundary conditions on the Pf of thermoelectric devices were investigated. Yielding of the solder contacts and mounting layer was taken into account. The modeling results showed that the use of longer legs, using skutterudites, allowing the thermoelectric device to freely deform while under a thermal gradient, and using smaller arrays promoted higher probabilities of survival.

Jadaan, Osama M. [University of Wisconsin, Platteville; Wereszczak, Andrew A [ORNL

2009-05-01T23:59:59.000Z

362

Comparison of different pressing techniques for the preparation of n-type silicon-germanium thermoelectric alloys  

SciTech Connect (OSTI)

Improvements to state-of-the-art Si{sub 80}Ge{sub 20} thermoelectric alloys have been observed in laboratory-scale samples by the powder metallurgy techniques of mechanical alloying and hot pressing. Incorporating these improvements in large scale compacts for the production of thermoelectric generator elements is the next step in achieving higher efficiency RTGs. This paper discusses consolidation of large quantities of mechanically alloyed powders into production size compacts. Differences in thermoelectric properties are noted between the compacts prepared by the standard technique of hot uniaxial pressing and hot isostatic pressing. Most significant is the difference in carrier concentration between the alloys prepared by the two consolidation techniques.

Harringa, J.L.; Cook, B.A.

1996-06-01T23:59:59.000Z

363

Concentrated Thermoelectric Power | Department of Energy  

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

Concentrated Thermoelectric Power This fact sheet describes a concentrated solar hydroelectric power project awarded under the DOE's 2012 SunShot Concentrating Solar Power R&D...

364

Scientists Connect Thermoelectric Materials and Topological Insulators...  

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

and relativity in combination produce a unique conducting state on the surface. Excellent thermoelectric performance depends on a material having both high conductivity and high...

365

Thermoelectric Activities of European Community within Framework...  

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

of European Community within Framework Programme 7 and additional activities in Germany Thermoelectric Activities of European Community within Framework Programme 7 and...

366

Thermoelectric Materials by Design: Computational Theory and...  

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

by Design: Computational Theory and Structure Thermoelectric Materials by Design: Computational Theory and Structure Presentation from the U.S. DOE Office of Vehicle Technologies...

367

High-Temperature Thermoelectric Materials Characterization for...  

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

High-Temperature Thermoelectric Materials Characterization for Automotive Waste Heat Recovery: Success Stories from the High Temperature Materials Laboratory (HTML) User Program...

368

Thermoelectric Materials By Design: Mechanical Reliability (Agreement...  

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

By Design: Mechanical Reliability (Agreement 14957) Thermoelectric Materials By Design: Mechanical Reliability (Agreement 14957) Presentation from the U.S. DOE Office of Vehicle...

369

Thermoelectric Materials by Design, Computational Theory and...  

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

by Design, Computational Theory and Structure Thermoelectric Materials by Design, Computational Theory and Structure 2009 DOE Hydrogen Program and Vehicle Technologies Program...

370

Thermoelectric Bulk Materials from the Explosive Consolidation...  

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

Bulk Materials from the Explosive Consolidation of Nanopowders Thermoelectric Bulk Materials from the Explosive Consolidation of Nanopowders Describes technique of explosively...

371

High Temperature Thermoelectric Materials Characterization for...  

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

High Temperature Thermoelectric Materials Characterization for Automotive Waste Heat Recovery: Success Stories from the High Temperature Materials Laboratory (HTML) User Program...

372

Electrical and Thermoelectrical Transport Properties of Graphene  

E-Print Network [OSTI]

OF CALIFORNIA RIVERSIDE Electrical and ThermoelectricalIn addition to the electrical conductivity, thermoelectricthe energy-dependent electrical conductivity under certain

Wang, Deqi

2011-01-01T23:59:59.000Z

373

Ferecrystals: Thermoelectric Materials Poised Between the Crystalline...  

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

These new compounds are thermal stable to 650 C, have low thermal and an increased ZT. johnson.pdf More Documents & Publications Trends in Thermoelectric Properties with...

374

Trends in Thermoelectric Properties with Nanostructure: Ferecrystals...  

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

to interleave on the nanoscale two or more compounds with different crystal structures johnson.pdf More Documents & Publications Ferecrystals: Thermoelectric Materials Poised...

375

Vehicular Thermoelectrics: The New Green Technology  

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

eere.energy.gov 37 Green Advantage of Vehicular Thermoelectric HVAC Current Vehicular Air Conditioner (AC) uses Compressed R134-a Refrigerant Gas -- Vehicles leak 110 gyear...

376

Microstructure and Thermoelectric Properties of Mechanically...  

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

Microstructure and Thermoelectric Properties of Mechanically Robust PbTe-Si Eutectic Composites Home Author: J. R. Sootsman, J. He, V. P. Dravid, S. Ballikaya, D. Vermeulen, C....

377

Correlation Between Structure and Thermoelectric Properties of...  

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

converted into crystalline bulks under pressure produced thermoelectric materials of nano-sized grains with strongly coupled grain boundaries, achieving reduced lattice thermal...

378

Recent Device Developments with Advanced Bulk Thermoelectric...  

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

at RTI Reviews work in engineered thin-film nanoscale thermoelectric materials and nano-bulk materials with high ZT undertaken by RTI in collaboration with its research...

379

Thermoelectric power source utilizing ambient energy harvesting for remote sensing and transmitting  

DOE Patents [OSTI]

A method and apparatus for providing electrical energy to an electrical device wherein the electrical energy is originally generated from temperature differences in an environment having a first and a second temperature region. A thermoelectric device having a first side and a second side wherein the first side is in communication with a means for transmitting ambient thermal energy collected or rejected in the first temperature region and the second side is in communication with the second temperature region thereby producing a temperature gradient across the thermoelectric device and in turn generating an electrical current.

DeSteese, John G

2010-11-16T23:59:59.000Z

380

Thermoelectric behavior of conducting polymers: On the possibility of off-diagonal thermoelectricity  

SciTech Connect (OSTI)

Non-cubic materials, when structurally aligned, possess sufficient anisotropy to exhibit thermoelectric effects where the electrical and thermal currents are orthogonal (off-diagonal thermoelectricity). The authors discuss the benefits of this form of thermoelectricity for devices and describe a search for suitable properties in the air-stable conducting polymers polyaniline and polypyrrole. They find the simple and general correlation that the logarithm of the electrical conductivity scales linearly with the Seebeck coefficient on doping but with proportionality in excess of the conventional prediction for thermoelectricity. The correlation is unexpected in its universality and unfavorable for thermoelectric applications. A simple model suggests that mobile charges of both signs exist in these polymers, and this leads to reduced thermoelectric efficiency. They also briefly discuss non air-stable polyacetylene, where ambipolar transport does not appear to occur, and where properties seem more favorable for thermoelectricity.

Mateeva, N.; Niculescu, H.; Schlenoff, J.; Testardi, L.

1997-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermoelectric generator rtg" 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

Transport Properties of Bulk Thermoelectrics An International Round-Robin Study, Part I: Seebeck Coefficient and Electrical Resistivity  

SciTech Connect (OSTI)

Recent research and development of high temperature thermoelectric materials has demonstrated great potential of converting automobile exhaust heat directly into electricity. Thermoelectrics based on classic bismuth telluride have also started to impact the automotive industry by enhancing air conditioning efficiency and integrated cabin climate control. In addition to engineering challenges of making reliable and efficient devices to withstand thermal and mechanical cycling, the remaining issues in thermoelectric power generation and refrigeration are mostly materials related. The figure-of-merit, ZT, still needs to improve from the current value of 1.0 - 1.5 to above 2 to be competitive to other alternative technologies. In the meantime, the thermoelectric community could greatly benefit from the development of international test standards, improved test methods and better characterization tools. Internationally, thermoelectrics have been recognized by many countries as an important area for improving energy efficiency. The International Energy Agency (IEA) group under the implementing agreement for Advanced Materials for Transportation (AMT) identified thermoelectric materials as an important area in 2009. This paper is Part I of the international round-robin testing of transport properties of bulk thermoelectrics. The main focuses in Part I are on two electronic transport properties: Seebeck coefficient and electrical resistivity.

Wang, Hsin [ORNL; Porter, Wallace D [ORNL; Bottner, Harold [Fraunhofer-Institute, Freiburg, Germany; Konig, Jan [Fraunhofer-Institute, Freiburg, Germany; Chen, Lidong [Chinese Academy of Sciences; Bai, Shengqiang [Chinese Academy of Sciences; Tritt, Terry M. [Clemson University; Mayolett, Alex [Corning, Inc; Senawiratne, Jayantha [Corning, Inc; Smith, Charlene [Corning, Inc; Harris, Fred [ZT-Plus; Gilbert, Partricia [Marlow Industries, Inc; Sharp, Jeff [Marlow Industries, Inc; Lo, Jason [CANMET - Materials Technology Laboratory, Natural Resources of Canada; Keinke, Holger [University of Waterloo, Canada; Kiss, Laszlo I. [University of Quebec at Chicoutimi

2013-01-01T23:59:59.000Z

382

Photo-controllable thermoelectric properties with reversibility and photo-thermoelectric effects of tungsten trioxide accompanied by its photochromic phenomenon  

SciTech Connect (OSTI)

The addition of photo-controllable properties to tungsten trioxide (WO{sub 3}) is of interest for developing practical applications of WO{sub 3} as well as for interpreting such phenomena from scientific viewpoints. Here, a sputtered crystalline WO{sub 3} thin film generated thermoelectric power due to ultraviolet (UV) light-induced band-gap excitation and was accompanied by a photochromic reaction resulting from generating W{sup 5+} ions. The thermoelectric properties (electrical conductivity (?) and Seebeck coefficient (S)) and coloration of WO{sub 3} could be reversibly switched by alternating the external stimulus between UV light irradiation and dark storage. After irradiating the film with UV light, ? increased, whereas the absolute value of S decreased, and the photochromic (coloration) reaction was detected. Notably, the opposite behavior was exhibited by WO{sub 3} after dark storage, and this reversible cycle could be repeated at least three times. Moreover, photo-thermoelectric effects (photo-conductive effect (photo-conductivity, ?{sub photo}) and photo-Seebeck effect (photo-Seebeck coefficient, S{sub photo})) were also detected in response to visible-light irradiation of the colored WO{sub 3} thin films. Under visible-light irradiation, ?{sub photo} and the absolute value of S{sub photo} increased and decreased, respectively. These effects are likely attributable to the excitation of electrons from the mid-gap visible light absorption band (W{sup 5+} state) to the conduction band of WO{sub 3}. Our findings demonstrate that the simultaneous, reversible switching of multiple properties of WO{sub 3} thin film is achieved by the application of an external stimulus and that this material exhibits photo-thermoelectric effects when irradiated with visible-light.

Azuma, Chiori [Faculty of Engineering, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi 400-8511 (Japan); Kawano, Takuto [Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi 400-8511 (Japan); Kakemoto, Hirofumi; Irie, Hiroshi, E-mail: hirie@yamanashi.ac.jp [Clean Energy Research Center, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi 400-8511 (Japan)

2014-11-07T23:59:59.000Z

383

Atomic-level cotrol of the thermoelectric properties in polytypoid nanowires  

SciTech Connect (OSTI)

Thermoelectric materials have generated interest as a means of increasing the efficiency of power generation through the scavenging of waste heat. Materials containing nanometer-sized structural and compositional features can exhibit enhanced thermoelectric performance due to the decoupling of certain electrical and thermal properties, but the extent to which these features can be controlled is often limited. Here we report a simple synthesis of M{sub 2}O{sub 3}(ZnO){sub n} (M = In, Ga, Fe) nanowires with controllable polytypoid structures, where the nanostructured features are tuned by adjusting the amount of metal precursor. After the introduction of nanometer-scale features (individual atomic layers and alloying), thermal and electrical measurements on single In{sub 2-x}Ga{sub x}O3(ZnO){sub n} nanowires reveal a simultaneous improvement in all contributing factors to the thermoelectric figure of merit, indicating successful modification of the nanowire transport properties.

Andrews, Sean C.; Fardy, Melissa A.; Moore, Michael C.; Aloni, Shaoul; Zhang, Minjuan; Radmilovic, Velimir; Yang, Peidong

2010-10-23T23:59:59.000Z

384

IMPROVING THERMOELECTRIC TECHNOLOGY PERFORMANCE AND DURABILITY WITH AEROGEL  

E-Print Network [OSTI]

aerogel as an effective sublimation barrier for a wide range of thermoelectric technologies based on Si

Jeff Sakamoto; Thierry Caillat; Jean-pierre Fleurial; Steve Jones; Jong-ah Paik; Winny Dong

385

Stresa, Italy, 26-28 April 2006 THERMOELECTRIC AND MICROBATTERY HYBRID SYSTEM WITH ITS POWER  

E-Print Network [OSTI]

developed. It consists in hybriding an energy storage system (thin film solid state battery change depending on the outside conditions) and required by the thin film solid state battery conversion and energy storage. A hybrid system comprising a thermoelectric generator, a thin film solid state

Paris-Sud XI, Université de

386

Atomic-level control of the thermoelectric properties in polytypoid nanowires Sean C. Andrews,ab  

E-Print Network [OSTI]

electrical power is generated through the scavenging of waste heat. The efficiency of this conversion the scavenging of waste heat. Materials containing nanometer-sized structural and compositional features canAtomic-level control of the thermoelectric properties in polytypoid nanowires Sean C. Andrews

Yang, Peidong

387

Powering a Cat Warmer Using Thin-Film Thermoelectric Conversion of Microprocessor  

E-Print Network [OSTI]

towards one end, creating a difference in potential. The efficiency of thermo- electric generators (TEG efficiencies when converting heat to electricity using the thermoelectric ef- fect. Applied to microprocessors produced by laptops [14], [17], climate-change inducing electricity consumption [11], and unhappy house

Yang, Junfeng

388

Studying Thermoelectric Oxides using High-Resolution Scanning Transmission Electron Figure 4: a) Atomic resolution Z-  

E-Print Network [OSTI]

the environmental impact, and deliver energy continuously, such as thermo-electric power generation, have often been as distinct peaks. The environmental impact of global climate change due to the combustion of fossil fuels is focused on either carbon-based fuels or wind and solar energy, approaches that are portable, minimize

Ben-Arie, Jezekiel

389

Thermoelectric materials development. Final report  

SciTech Connect (OSTI)

A systematic search for advanced thermoelectric materials was initiated at JPL several years ago to evaluate candidate materials which includes consideration of the following property attributes: (1) semiconducting properties; (2) large Seebeck coefficient; (3) high carrier mobility and high electrical conductivity; (4) low lattice thermal conductivity; and (5) chemical stability and low vapor pressure. Through this candidate screening process, JPL identified several families of materials as promising candidates for improved thermoelectric materials including the skutterudite family. There are several programs supporting various phases of the effort on these materials. As part of an ongoing effort to develop skutterudite materials with lower thermal conductivity values, several solid solutions and filled skutterudite materials were investigated under the effort sponsored by DOE. The efforts have primarily focused on: (1) study of existence and properties of solid solutions between the binary compounds CoSb{sub 3} and IrSb{sub 3}, and RuSb{sub 2}Te, and (2) CeFe{sub 4{minus}x}Sb{sub 12} based filled compositions. For the solid solutions, the lattice thermal conductivity reduction was expected to be reduced by the introduction of the Te and Ru atoms while in the case of CeFe{sub 4{minus}x}Ru{sub x}Sb{sub 12} based filled compositions. For the solid solutions, the lattice thermal conductivity reduction was expected to be reduced by the introduction of the Te and Ru atoms while in the case of CeFe{sub 4{minus}x}Ru{sub x}Sb{sub 12} filled compositions, the reduction would be caused by the rattling of Ce atoms located in the empty voids of the skutterudite structure and the substitution of Fe for Ru. The details of the sample preparation and characterization of their thermoelectric properties are reported in this report.

Fleurial, J.P.; Caillat, T.; Borshchevsky, A.

1998-09-01T23:59:59.000Z

390

Silicon-Based Thermoelectrics: Harvesting Low Quality Heat Using Economically Printed Flexible Nanostructured Stacked Thermoelectric Junctions  

SciTech Connect (OSTI)

Broad Funding Opportunity Announcement Project: UIUC is experimenting with silicon-based materials to develop flexible thermoelectric devices—which convert heat into energy—that can be mass-produced at low cost. A thermoelectric device, which resembles a computer chip, creates electricity when a different temperature is applied to each of its sides. Existing commercial thermoelectric devices contain the element tellurium, which limits production levels because tellurium has become increasingly rare. UIUC is replacing this material with microscopic silicon wires that are considerably cheaper and could be equally effective. Improvements in thermoelectric device production could return enough wasted heat to add up to 23% to our current annual electricity production.

None

2010-03-01T23:59:59.000Z

391

Synthesis of High Efficiency Thermoelectric Materials - Energy...  

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

or subjected to spark-plasma sintering for a matter of minutes. The end result is a thermoelectric material with ZT about 20% to 50% higher than the bulk value. Benefits...

392

Photoacoustic measurement of bandgaps of thermoelectric materials  

E-Print Network [OSTI]

Thermoelectric materials are a promising class of direct energy conversion materials, usually consisting of highly doped semiconductors. The key to maximizing their thermal to electrical energy conversion lies in optimizing ...

Ni, George (George Wei)

2014-01-01T23:59:59.000Z

393

Modeling water use at thermoelectric power plants  

E-Print Network [OSTI]

The withdrawal and consumption of water at thermoelectric power plants affects regional ecology and supply security of both water and electricity. The existing field data on US power plant water use, however, is of limited ...

Rutberg, Michael J. (Michael Jacob)

2012-01-01T23:59:59.000Z

394

Device testing and characterization of thermoelectric nanocomposites  

E-Print Network [OSTI]

It has become evident in recent years that developing clean, sustainable energy technologies will be one of the world's greatest challenges in the 21st century. Thermoelectric materials can potentially make a contribution ...

Muto, Andrew (Andrew Jerome)

2008-01-01T23:59:59.000Z

395

Thermoelectrics : material advancements and market applications  

E-Print Network [OSTI]

Thermoelectric properties have been known since the initial discovery in 1821 by Thomas Seebeck, who found that a current flowed at the junction of two dissimilar metals when placed under a temperature differential. This ...

Monreal, Jorge

2007-01-01T23:59:59.000Z

396

Generalized drift-diffusion for microscopic thermoelectricity  

E-Print Network [OSTI]

Although thermoelectric elements increasingly incorporate nano-scale features in similar material systems as other micro-electronic devices, the former are described in the language of irreversible thermodynamics while ...

Santhanam, Parthiban

2009-01-01T23:59:59.000Z

397

Segregated Network Polymer-Carbon Nanotubes Composites For Thermoelectrics  

E-Print Network [OSTI]

nanocomposites were measured for carbon nanotubes and the thermoelectric figure of merit, ZT, was calculated at room temperature. The influence on thermoelectric properties from filler concentration, stabilizer materials and drying condition are also discussed....

Kim, Dasaroyong

2010-10-12T23:59:59.000Z

398

advanced thermoelectric materials: Topics by E-print Network  

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

advanced thermoelectric materials First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Thermoelectrics :...

399

Synthesis and physical characterization of thermoelectric single crystals  

E-Print Network [OSTI]

There is much current interest in thermoelectric devices for sustainable energy. This thesis describes a research project on the synthesis and physical characterization of thermoelectric single crystals. 1In?Se?-[delta] ...

Porras Pérez Guerrero, Juan Pablo

2012-01-01T23:59:59.000Z

400

Proposal for a phase-coherent thermoelectric transistor  

E-Print Network [OSTI]

solution since their near perfect electron-hole symmetry leads to a negligible thermoelectric response; however, here we demonstrate theoretically a superconducting thermoelectric transistor which offers unparalleled figures of merit of up to ~ 45...

Giazotto, F.; Robinson, J. W. A.; Moodera, J. S.; Bergeret, F. S.

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "thermoelectric generator rtg" 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

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...

402

Compositional ordering and stability in nanostructured, bulk thermoelectric alloys.  

SciTech Connect (OSTI)

Thermoelectric materials have many applications in the conversion of thermal energy to electrical power and in solid-state cooling. One route to improving thermoelectric energy conversion efficiency in bulk material is to embed nanoscale inclusions. This report summarize key results from a recently completed LDRD project exploring the science underpinning the formation and stability of nanostructures in bulk thermoelectric and the quantitative relationships between such structures and thermoelectric properties.

Hekmaty, Michelle A.; Faleev, S.; Medlin, Douglas L.; Leonard, F.; Lensch-Falk, J.; Sharma, Peter Anand; Sugar, J. D.

2009-09-01T23:59:59.000Z

403

Thermoelectrics Combined with Solar Concentration for Electrical and Thermal Cogeneration  

E-Print Network [OSTI]

the thermoelectric module, and the water cooling tubes. Tothermoelectric module, combined with the thermal power transferred by the water cooling

Jackson, Philip Robert

2012-01-01T23:59:59.000Z

404

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...

405

Engineering Enhanced Thermoelectric Properties in Zigzag Graphene Nanoribbons  

E-Print Network [OSTI]

- ties [7]. Graphene, however, is not a useful thermoelectric material. Although its electricalEngineering Enhanced Thermoelectric Properties in Zigzag Graphene Nanoribbons Hossein Karamitaheri1@iue.tuwien.ac.at (Dated: March 7, 2012) Abstract We theoretically investigate the thermoelectric properties of zigzag

406

Evaluating the potential for high thermoelectric efficiency of silver selenide  

E-Print Network [OSTI]

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

Martin, Alain

407

G. J. Snyder Page 1 THERMOELECTRIC PROPERTIES OF SELENIDE SPINELS  

E-Print Network [OSTI]

of merit, ZT, for thermoelectric materials. The figure of merit is defined as ZT = 2 T/, where conductivity. Thus, one method for finding new, advanced thermoelectric materials is to searchG. J. Snyder Page 1 THERMOELECTRIC PROPERTIES OF SELENIDE SPINELS G. Jeffrey Snyder*, T. Caillat

408

Development, evaluation, and design applications of an AMTEC converter model  

E-Print Network [OSTI]

of performance curves . . . . . . . 90 INTRODUCTION In the recent history of space exploration, space vehicles slated for missions that ventured into deep space, far from the sun, typically relied on Radioisotope Thermoelectric Generator (RTG) power sources... this need is a type of generator that uses technology known as alkali metal thermal-to-electric conversion (AMTEC). This device, like previous thermoelectric power systems, converts thermal energy directly to electricity. Developed at Ford Scientific...

Spence, Cliff Alan

2002-01-01T23:59:59.000Z

409

Thermoelectric Potential of Bi and Bi1-x Sbx Nanowire M. S. Dresselhausa,b  

E-Print Network [OSTI]

for thermoelectric applications is discussed. The advantages of bismuth as a low dimensional thermoelectric material as the wire diameter as materials parameters for optimizing the thermoelectric performance of these nanowires thermoelectric material. INTRODUCTION Bismuth provides a very attractive model system for thermoelectric

Cronin, Steve

410

Feasibility of Thermoelectrics for Waste Heat Recovery in Conventional Vehicles  

SciTech Connect (OSTI)

Thermoelectric (TE) generators convert heat directly into electricity when a temperature gradient is applied across junctions of two dissimilar metals. The devices could increase the fuel economy of conventional vehicles by recapturing part of the waste heat from engine exhaust and generating electricity to power accessory loads. A simple vehicle and engine waste heat model showed that a Class 8 truck presents the least challenging requirements for TE system efficiency, mass, and cost; these trucks have a fairly high amount of exhaust waste heat, have low mass sensitivity, and travel many miles per year. These factors help maximize fuel savings and economic benefits. A driving/duty cycle analysis shows strong sensitivity of waste heat, and thus TE system electrical output, to vehicle speed and driving cycle. With a typical alternator, a TE system could allow electrification of 8%-15% of a Class 8 truck's accessories for 2%-3% fuel savings. More research should reduce system cost and improve economics.

Smith, K.; Thornton, M.

2009-04-01T23:59:59.000Z

411

Measurement and characterization techniques for thermoelectric materials  

SciTech Connect (OSTI)

Characterization of thermoelectric materials can pose many problems. A temperature difference can be established across these materials as an electrical current is passed due to the Peltier effect. The thermopower of these materials is quite large and thus large thermal voltages can contribute to many of the measurements necessary to investigate these materials. This paper will discuss the chracterization techniques necessary to investigate these materials and provide an overview of some of the potential systematic errors which can arise. It will also discuss some of the corrections one needs to consider. This should provide an introduction to the characterization and measurement of thermoelectric materials and provide references for a more in depth discussion of the concepts. It should also serve as an indication of the care that must be taken while working with thermoelectric materials.

Tritt, T.M.

1997-07-01T23:59:59.000Z

412

Alkaline earth filled nickel skutterudite antimonide thermoelectrics  

DOE Patents [OSTI]

A thermoelectric material including a body centered cubic filled skutterudite having the formula A.sub.xFe.sub.yNi.sub.zSb.sub.12, where A is an alkaline earth element, x is no more than approximately 1.0, and the sum of y and z is approximately equal to 4.0. The alkaline earth element includes guest atoms selected from the group consisting of Be, Mb, Ca, Sr, Ba, Ra and combinations thereof. The filled skutterudite is shown to have properties suitable for a wide variety of thermoelectric applications.

Singh, David Joseph

2013-07-16T23:59:59.000Z

413

Holey Silicon as an Efficient Thermoelectric Material  

SciTech Connect (OSTI)

This work investigated the thermoelectric properties of thin silicon membranes that have been decorated with high density of nanoscopic holes. These ?holey silicon? (HS) structures were fabricated by either nanosphere or block-copolymer lithography, both of which are scalable for practical device application. By reducing the pitch of the hexagonal holey pattern down to 55 nm with 35percent porosity, the thermal conductivity of HS is consistently reduced by 2 orders of magnitude and approaches the amorphous limit. With a ZT value of 0.4 at room temperature, the thermoelectric performance of HS is comparable with the best value recorded in silicon nanowire system.

Tang, Jinyao; Wang, Hung-Ta; Hyun Lee, Dong; Fardy, Melissa; Huo, Ziyang; Russell, Thomas P.; Yang, Peidong

2010-09-30T23:59:59.000Z

414

Silicon-germanium/gallium phosphide material in high power density thermoelectric modules. Final report, February 1980--September 1981  

SciTech Connect (OSTI)

This is the final report of work on the characterization of an improved Si-Ge alloy and the fabrication of thermoelectric devices. The improved Si-Ge alloy uses a small addition of GaP in n- and p- type 80 at.% Si-20 at.% Ge; this addition reduces the thermal conductivity, thereby increasing its figure of merit and conversion efficiency. The thermoelectric devices fabricated include multicouples intended for use in Radioisotope Thermoelectric Generators (RTGs) and ring-type modules intended for use with nuclear reactor heat sources. This report summarizes the effort in the material as well as the device areas and discusses individual phases of each area. Results should form basis for further effort.

Not Available

1981-12-31T23:59:59.000Z

415

Minority-Carrier Thermoelectric Devices Kevin P. Pipe and Rajeev J. Ram  

E-Print Network [OSTI]

results are given for several common material systems. Introduction Thermoelectric effects haveMinority-Carrier Thermoelectric Devices Kevin P. Pipe and Rajeev J. Ram Research Laboratory the thermoelectric performance of the electronic devices themselves. Recognizing that minority carriers play

416

On the role of interface imperfections in thermoelectric nondestructive materials characterization  

E-Print Network [OSTI]

On the role of interface imperfections in thermoelectric nondestructive materials characterization of thermoelectric nondestructive materials characterization technique. It is shown that contact heating between used in nonde- structive materials characterization. The thermoelectric volt- age is given by VSR Tc Ti

Nagy, Peter B.

417

Thermoelectric cooling container for medical applications  

SciTech Connect (OSTI)

In this work the thermoelectric cooling container for storing and transportation of the medicine, particularly for insulin, is discussed. In the working volume the temperature is supported on the level of +4 C. The container can work in two operating conditions: with the power supply and without the power supply. Two removable blocks are used for this purpose. One block (thermoelectric) is used for the work with the power supply and another (passive)-for the work without power supply. The thermoelectric block has a 12V power supply, which is used in the automobiles, yachts and other kinds of transport. The temperature in the working volume is supported by the use of the Peltier effect. An electronic device is used in this block and stabilizes temperature on the level of +4 C and indicates information about working conditions. The thermoelectric container has a power supply block for work at 220(110)V. The working temperature in the container can be maintained in the absence of the power supply. In this case the necessary temperature conditions are supported by melting of the crystallized salt. For this purpose the container has a hermetic volume containing this salt and contacting with the working volume.

Aivazov, A.A.; Shtern, Y.I.; Budaguan, B.G.; Makhrachev, K.B.; Pastor, M.

1997-07-01T23:59:59.000Z

418

Design concepts for improved thermoelectric materials  

SciTech Connect (OSTI)

Some new guidelines are given that should be useful in the search for thermoelectric materials that are better than those currently available. In particular, clathrate and cryptoclathrate compounds with filler atoms in their cages offer the ability to substantially lower the lattice thermal conductivity.

Slack, G.A.

1997-07-01T23:59:59.000Z

419

THERMOELECTRICAL ENERGY RECOVERY FROM THE EXHAUST OF A LIGHT TRUCK  

SciTech Connect (OSTI)

A team formed by Clarkson University is engaged in a project to design, build, model, test, and develop a plan to commercialize a thermoelectric generator (TEG) system for recovering energy from the exhaust of light trucks and passenger cars. Clarkson University is responsible for project management, vehicle interface design, system modeling, and commercialization plan. Hi-Z Technology, Inc. (sub-contractor to Clarkson) is responsible for TEG design and construction. Delphi Corporation is responsible for testing services and engineering consultation and General Motors Corporation is responsible for providing the test vehicle and information about its systems. Funds were supplied by a grant from the Transportation Research Program of the New York State Energy Research and Development Authority (NYSERDA), through Joseph R. Wagner. Members of the team and John Fairbanks (Project Manager, Office of Heavy Vehicle Technology). Currently, the design of TEG has been completed and initial construction of the TEG has been initiated by Hi-Z. The TEG system consists of heat exchangers, thermoelectric modules and a power conditioning unit. The heat source for the TEG is the exhaust gas from the engine and the heat sink is the engine coolant. A model has been developed to simulate the performance of the TEG under varying operating conditions. Preliminary results from the model predict that up to 330 watts can be generated by the TEG which would increase fuel economy by 5 percent. This number could possibly increase to 20 percent with quantum-well technology. To assess the performance of the TEG and improve the accuracy of the modeling, experimental testing will be performed at Delphi Corporation. A preliminary experimental test plan is given. To determine the economic and commercial viability, a business study has been conducted and results from the study showing potential areas for TEG commercialization are discussed.

Karri, M; Thacher, E; Helenbrook, B; Compeau, M; Kushch, A; Elsner, N; Bhatti, M; O' Brien, J; Stabler, F

2003-08-24T23:59:59.000Z

420

Thermoelectric Couple Demonstration of (In, Ce)-based Skutterudite...  

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

Couple Demonstration of (In, Ce)-based Skutterudite Materials for Automotive Energy Recovery Thermoelectric Couple Demonstration of (In, Ce)-based Skutterudite Materials for...

Note: This page contains sample records for the topic "thermoelectric generator rtg" 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

Strategies for High Thermoelectric zT in Bulk Materials  

Broader source: Energy.gov [DOE]

Zintl principle in chemistry, complex electronic band structures, and incorporation of nanometer sized particles were used to explore, optimize and improve bulk thermoelectric materials

422

Automotive Thermoelectric Moduleswith Scalable Thermo- andElectro...  

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

Thermo- and Electro-Mechanical Interfaces Interface materials based on carbon nanotubes and metallic alloys, scalable p- and n-type thermoelectrics, materials compatibility...

423

Develop Thermoelectric Technology for Automotive Waste Heat Recovery...  

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

& Publications Engineering and Materials for Automotive Thermoelectric Applications Electrical and Thermal Transport Optimization of High Efficient n-type Skutterudites Electrical...

424

Review of Interests and Activities in Thermoelectric Materials...  

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

heat-powered mobile units, and for thermoelectric cooling of high-performance infrared systems for surveillance taylor.pdf More Documents & Publications Review of Interests...

425

Develop Thermoelectric Technology for Automotive Waste Heat Recovery...  

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

Waste Heat Recovery Engineering and Materials for Automotive Thermoelectric Applications Electrical and Thermal Transport Optimization of High Efficient n-type Skutterudites...

426

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

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

2006deerschock.pdf More Documents & Publications Thermoelectrici Conversion of Waste Heat to Electricity in an IC Engine-Powered Vehicle Development of Thermoelectric...

427

Thermoelectric Waste Heat Recovery Program for Passenger Vehicles...  

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

Waste Heat Recovery Program for Passenger Vehicles Thermoelectric Waste Heat Recovery Program for Passenger Vehicles 2012 DOE Hydrogen and Fuel Cells Program and Vehicle...

428

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...

429

High-Performance Thermoelectric Devices Based on Abundant Silicide...  

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

vehicle waste heat recovery will include fundamental research to use abundant promising low-cost thermoelectric materials, thermal management and interfaces design, and metrology...

430

Synthesis and evaluation of thermoelectric multilayer films  

SciTech Connect (OSTI)

The deposition of compositionally modulated (Bi{sub 1-x}Sb{sub x}){sub 2}(Te{sub 1-y}Se{sub y}){sub 3} thermoelectric multilayer films by magnetron sputtering has been demonstrated. Structures with a period of 140{Angstrom} are shown to be stable to interdiffusion at the high deposition temperatures necessary for growth of single layer crystalline films with ZT {gt} 0.5. These multilayers are of the correct dimension to exhibit the electronic properties of quantum well structures. Furthermore it is shown that the Seebeck coefficient of the films is not degraded by the presence of this multilayer structure. It may be possible to synthesize a multilayer thermoelectric material with enhanced ZT by maximizing the barrier height through optimization of the composition of the barrier.

Wagner, A.V.; Foreman, R.J.; Summers, L.J.; Barbee, T.W. Jr.; Farmer, J.C.

1996-03-21T23:59:59.000Z

431

General Relativistic Thermoelectric Effects in Superconductors  

E-Print Network [OSTI]

We discuss the general-relativistic contributions to occur in the electromagnetic properties of a superconductor with a heat flow. The appearance of general-relativistic contribution to the magnetic flux through a superconducting thermoelectric bimetallic circuit is shown. A response of the Josephson junctions to a heat flow is investigated in the general-relativistic framework. Some gravitothermoelectric effects which are observable in the superconducting state in the Earth's gravitational field are considered.

B. J. Ahmedov

2007-01-13T23:59:59.000Z

432

Composite Thermoelectric Devices | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-Up fromDepartmentTieCelebrate Earth Codestheatfor Optimized SCR SystemsThermoelectric

433

Vehicular Thermoelectrics Applications Overview | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy Usage »of EnergyTheTwoVulnerabilitiesPowertrainReadiness10Thermoelectrics

434

Special Application Thermoelectric Micro Isotope Power Sources  

SciTech Connect (OSTI)

Promising design concepts for milliwatt (mW) size micro isotope power sources (MIPS) are being sought for use in various space and terrestrial applications, including a multitude of future NASA scientific missions and a range of military applications. To date, the radioisotope power sources (RPS) used on various space and terrestrial programs have provided power levels ranging from one-half to several hundred watts. In recent years, the increased use of smaller spacecraft and planned new scientific space missions by NASA, special terrestrial and military applications suggest the need for lower power, including mW level, radioisotope power sources. These power sources have the potential to enable such applications as long-lived meteorological or seismological stations distributed across planetary surfaces, surface probes, deep space micro-spacecraft and sub-satellites, terrestrial sensors, transmitters, and micro-electromechanical systems. The power requirements are in the range of 1 mW to several hundred mW. The primary technical requirements for space applications are long life, high reliability, high specific power, and high power density, and those for some special military uses are very high power density, specific power, reliability, low radiological induced degradation, and very low radiation leakage. Thermoelectric conversion is of particular interest because of its technological maturity and proven reliability. This paper summarizes the thermoelectric, thermal, and radioisotope heat source designs and presents the corresponding performance for a number of mW size thermoelectric micro isotope power sources.

Heshmatpour, Ben; Lieberman, Al; Khayat, Mo; Leanna, Andrew; Dobry, Ted [Teledyne Energy Systems, Incorporated, 10707 Gilroy Road, Hunt Valley, MD 21031 (United States)

2008-01-21T23:59:59.000Z

435

Atomic-Scale Mapping of Thermoelectric Power on Graphene: Role of Defects and Boundaries  

E-Print Network [OSTI]

by conductance measurements alone. Indeed, the thermoelectric properties of this two-dimensional material have scattering effects in thermoelectric materials. An alternative way to study the thermoelectric properties1 Atomic-Scale Mapping of Thermoelectric Power on Graphene: Role of Defects and Boundaries Jewook

Feenstra, Randall

436

34th Intersociety Energy Conversion Engineering Conference p. 2567 (1999) A New High Efficiency Segmented Thermoelectric  

E-Print Network [OSTI]

the thermoelectric performance of the materials used to build the devices. However, no single thermoelectric material of integrating new thermoelectric materials developed at the Jet Propulsion Laboratory into a segmented of state-of-the-art thermoelectric materials and novel p-type Zn4Sb3, p-type CeFe4Sb12-based alloys and n

437

Cooling Enhancement Using Inhomogeneous Thermoelectric Materials Zhixi Bian and Ali Shakouri  

E-Print Network [OSTI]

Cooling Enhancement Using Inhomogeneous Thermoelectric Materials Zhixi Bian and Ali Shakouri Baskin The maximum cooling temperature of a thermoelectric refrigerator made of uniform bulk material is limited for a thermoelectric cooler based on single crystal silicon. Maximum Cooling of Thermoelectric Materials It is well

438

Thermoelectric Transport Properties of Single Bismuth Nanowires S. B. Cronin1  

E-Print Network [OSTI]

thermoelectric material. Bi nanowires, however, have been predicted to have a high thermoelectric efficiency [1 been predicted to be an excellent thermoelectric material, especially at low temperatures (77K) where no good thermoelectric material currently exists [5]. Our motivation for studying the Bi nanowire system

Cronin, Steve

439

Thermoelectric properties of high quality nanostructured Ge:Mn thin D. Tanoff2*  

E-Print Network [OSTI]

. The thermoelectric performance ZT of such material is as high as 0.15 making them a promising thermoelectric p the thermal properties by inducing phonon diffusion. The efficiency of thermoelectric materials is given properties of a nanostructured thermoelectric material are never those of the related bulk ones. Different

Boyer, Edmond

440

Band structure engineering through orbital interaction for enhanced thermoelectric power factor  

E-Print Network [OSTI]

interaction on band structure is demonstrated for IV-VI thermoelectric semiconductors. For IV-VI materials, we thermoelectric performance has been demonstrated in the premier thermoelectric material, lead telluride (PbBand structure engineering through orbital interaction for enhanced thermoelectric power factor

Ceder, Gerbrand

Note: This page contains sample records for the topic "thermoelectric generator rtg" 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

Development of Nanostructures in Thermoelectric Pb-Te-Sb Alloys , L. A. Collins2  

E-Print Network [OSTI]

in the figure of merit of thermoelectric materials. Fabrication of nanostructured thermoelectric materials via the discovery of materials with a high thermoelectric figure of merit, zT, defined as S2 T/, where immiscible thermoelectric materials: PbTe-Sb2Te3. This ternary system was selected for investigation because

442

Pyroelectric Nanogenerators for Harvesting Thermoelectric Energy Ken C. Pradel,  

E-Print Network [OSTI]

Pyroelectric Nanogenerators for Harvesting Thermoelectric Energy Ya Yang, Wenxi Guo, Ken C. Pradel, Guang Zhu, Yusheng Zhou, Yan Zhang, Youfan Hu, Long Lin, and Zhong Lin Wang*,, School of Material Information ABSTRACT: Harvesting thermoelectric energy mainly relies on the Seebeck effect that utilizes

Wang, Zhong L.

443

Thermoelectric Properties of Superlattice Materials with Variably Spaced Layers  

E-Print Network [OSTI]

Thermoelectric Properties of Superlattice Materials with Variably Spaced Layers T.D. Musho Interdisciplinary Materials Science, Vanderbilt University, Nashville, Tennessee 37212, USA D.G. Walker Department of electronic level alignment. We have investigated the thermoelectric proper- ties of VSSL structures using

Walker, D. Greg

444

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

445

Transportable automated ammonia sensor based on a pulsed thermoelectrically cooled  

E-Print Network [OSTI]

Transportable automated ammonia sensor based on a pulsed thermoelectrically cooled quantum single-frequency, thermoelectrically cooled, pulsed quantum-cascade laser with an embedded distributed absorption spectroscopy with a pulsed QC DFB laser was reported in Ref. 3, where wavelength modulation

446

Thermoelectric Behavior of Flexible Organic Nanocomposites with Carbon Nanotubes  

E-Print Network [OSTI]

with ~100 S/m of electrical conductivity, resulting ~10,000 µW/m-K2 of power factor. The result of this study shows that organic thermoelectric materials would be a promising approach for thermoelectric applications with light-weight and non-toxic nature....

Choi, Kyung Who

2013-12-03T23:59:59.000Z

447

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

448

Development of High Efficiency Segmented Thermoelectric Unicouples T. Caillat, J. -P. Fleurial, G. J. Snyder, and A. Borshchevsky  

E-Print Network [OSTI]

efficient, segmented thermoelectric unicouples incorporating advanced thermoelectric materials with superior). These segmented unicouples include a combination of state-of-the-art thermoelectric materials based on Bi2Te3 thermoelectric materials with superior thermoelectric figures of merit has been under development at the Jet

449

arXiv:1106.5208v3[cond-mat.mes-hall]25Apr2012 Thermoelectric transport with electron-phonon coupling and electron-electron  

E-Print Network [OSTI]

expands the potential of using thermoelectricity for meeting the challenge of being a sustainable energy, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA 4 Department of Physics, Zhejiang for the generation and harvesting of energy. It is well accepted that nanoscale materials en- gineering in principle

Li, Baowen

450

Modular Low Cost High Energy Exhaust Heat Thermoelectric Generator...  

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

Directions in Engine-Efficiency and Emissions Research (DEER) Conference in Detroit, MI, September 27-30, 2010. p-01stephenson.pdf More Documents & Publications Development of...

451

A Thermoelectric Generator with an Intermediate Heat Exchanger...  

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

Directions in Engine-Efficiency and Emissions Research (DEER) Conference in Detroit, MI, September 27-30, 2010. p-20kim.pdf More Documents & Publications Low and high...

452

Electronically and ionically conducting electrodes for thermoelectric generators  

DOE Patents [OSTI]

A composite article comprising a porous cermet electrode on a dense solid electrolyte and method of making same. The cerment electrode comprises beta-type-alumina and refractory metal.

Novak, Robert F. (Farmington Hills, MI); Weber, Neill (Murray, UT)

1987-01-01T23:59:59.000Z

453

Cost-Competitive Advanced Thermoelectric Generators for Direct...  

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

vehicles by 5% using advanced low cost TE technology: - Low cost materials, modules, heat exchangers, power conditioning, and vehicle integration for exhaust gas waste heat...

454

Multi-physics modeling of thermoelectric generators for waste...  

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

modeling Material properties and interface information (Experiments) Fluid temperature, Heat transfer coefficient & Pressure drop System temperature & Electric power Thermal...

455

Development of a 500 Watt High Temperature Thermoelectric Generator  

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

fuel economy. A growing percentage of customers are demanding greener vehicles. Waste heat is an untapped source for electric power that could reduce CO 2 3% - 7% near term and...

456

Development of Cost-Competitive Advanced Thermoelectric Generators...  

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

vehicles by 5% using advanced low cost TE technology: - Low cost materials, modules, heat exchangers, power conditioning, and vehicle integration for exhaust gas waste heat...

457

Development of a 100-Watt High Temperature Thermoelectric Generator  

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

Industry Amerigon Inc. Amerigon Inc. - - Europe Europe Sales, Technical Support Germany Sales, Technical Support Germany Amerigon Inc. Amerigon Inc. - - Europe Europe Sales,...

458

Commercialization of Bulk Thermoelectric Materials for Power Generation |  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-Up fromDepartmentTieCelebrate Earth Codesthe NaturalCommercial

459

Powering Curiosity: Multi-Mission Radioisotope Thermoelectric Generators |  

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 Energy Power.pdf11-161-LNG |September 15, 2010Energy6DepartmentOutages Update:Fleet

460

Overview of Progress in Thermoelectric Power Generation Technologies in  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion | Department ofT ib l L d F SSales LLCDieselEnergy Joining ActivitiesNEMS-H2, VersionJapan

Note: This page contains sample records for the topic "thermoelectric generator rtg" 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

Overview of Thermoelectric Power Generation Technologies in Japan |  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion | Department ofT ib l L d F SSales LLCDieselEnergy Joining| Department of

462

PACCAR/Hi-Z Thermoelectric Generator Project | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion | Department ofT ib l L d F SSales LLCDieselEnergy Joining|ActionOWENSDepartment

463

Thermal Strategies for High Efficiency Thermoelectric Power Generation |  

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 |Energy Usage »of EnergyThe EnergyDepartment of Energy TheAged

464

Thermoelectric Generator Development at Renault Trucks-Volvo Group |  

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 |Energy Usage »of EnergyThe EnergyDepartment ofPowered Vehicle |Department of Energy

465

Thermoelectric Generator Development for Automotive Waste Heat Recovery |  

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 |Energy Usage »of EnergyThe EnergyDepartment ofPowered Vehicle |Department of

466

Thermoelectric Generator Performance for Passenger Vehicles | Department of  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy Usage »of EnergyThe EnergyDepartment ofPowered Vehicle |Department ofEnergy

467

Thermoelectric Power Generation System with Loop Thermosyphon in Future  

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

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468

Low and high Temperature Dual Thermoelectric Generation Waste Heat Recovery  

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

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469

Integrated Design and Manufacturing of Thermoelectric Generator Using  

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 EnergyEnergyENERGY TAX POLICIES7.pdfFuel2007 | Department7 InspectionDepartmentInt'l Smart

470

Development of a 100-Watt High Temperature Thermoelectric Generator |  

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 Pump Models |Conduct, Parent CompanyaUSAMP AMDHeavy Duty Trucks |2|Department of

471

Development of a 500 Watt High Temperature Thermoelectric Generator |  

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

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472

Development of a Scalable 10% Efficient Thermoelectric Generator |  

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

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473

State of the Art Prototype Vehicle with a Thermoelectric Generator. |  

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

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474

Status of Segmented Element Thermoelectric Generator for Vehicle Waste Heat  

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

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475

System level modeling of thermoelectric generators for automotive  

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

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476

A Thermoelectric Generator with an Intermediate Heat Exchanger for  

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

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477

Advanced Thermoelectric Materials and Generator Technology for Automotive  

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

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478

Development of Cost-Competitive Advanced Thermoelectric Generators for  

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

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479

Skutterudite Thermoelectric Generator For Automotive Waste Heat Recovery |  

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

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480

High Reliability, High TemperatureThermoelectric Power Generation Materials  

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

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Note: This page contains sample records for the topic "thermoelectric generator rtg" from the National Library of EnergyBeta (NLEBeta).
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481

Automotive Thermoelectric Generator (TEG) Controls | Department of Energy  

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

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482

Automotive Thermoelectric Generator Design Issues | Department of Energy  

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

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483

Automotive Thermoelectric Generators and HVAC | Department of Energy  

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

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484

Modular Low Cost High Energy Exhaust Heat Thermoelectric Generator with  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion | Department ofT ib l L d F S i DOE TribaltheMyMinutes fromBased|SEI Layer

485

An Affordable Advanced Biomass Cookstove with Thermoelectric Generator (TEG)  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-Up fromDepartment ofEnergy Natural Gas:Austin, TMOAB,Motor ChallengeAmyDepartmentDOE

486

Scaling Considerations for Thermoelectric Generators | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion | Department ofT ib l LPROJECTS IN7 RoadmapProgram| Department ofat ThisasScale ThisScaling

487

Energy harvesting using a thermoelectric material  

DOE Patents [OSTI]

A novel energy harvesting system and method utilizing a thermoelectric having a material exhibiting a large thermally induced strain (TIS) due to a phase transformation and a material exhibiting a stress induced electric field is introduced. A material that exhibits such a phase transformation exhibits a large increase in the coefficient of thermal expansion over an incremental temperature range (typically several degrees Kelvin). When such a material is arranged in a geometric configuration, such as, for a example, a laminate with a material that exhibits a stress induced electric field (e.g. a piezoelectric material) the thermally induced strain is converted to an electric field.

Nersessian, Nersesse (Van Nuys, CA); Carman, Gregory P. (Los Angeles, CA); Radousky, Harry B. (San Leandro, CA)

2008-07-08T23:59:59.000Z

488

Studies of bulk materials for thermoelectric cooling  

SciTech Connect (OSTI)

The authors discuss ongoing work in three areas of thermoelectric materials research: (1) broad band semiconductors featuring anion networks, (2) filled skutterudites, and (3) polycrystalline Bi-Sb alloys. Key results include: a preliminary evaluation of a previously untested ternary semiconductor, KSnSb; the first reported data in which Sn is used as a charge compensator in filled antimonide skutterudites; the finding that Sn doping does not effect polycrystalline Bi{sub 1{minus}x}Sb{sub x} as it does single crystal samples.

Sharp, J.W.; Nolas, G.S.; Volckmann, E.H.

1997-07-01T23:59:59.000Z

489

Electronic and thermal transport in GeTe: A versatile base for thermoelectric materials  

DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

GeTe is a narrow-band gap semiconductor, where Ge vacancies generate free charge carriers, holes, forming a self-dopant degenerate system with p-type conductivity, and serves as a base for high-performance multicomponent thermoelectric materials. There is a significant discrepancy between the electronic and thermal transport data for GeTe-based materials reported in the literature, which obscures the baseline knowledge and prevents a clear understanding of the effect of alloying GeTe with various elements. A comprehensive study including XRD, SEM, EDS, Seebeck coefficient, electrical resistivity, thermal conductivity, and 125Te NMR of several GeTe samples was conducted. Similar Seebeck coefficient and electrical resistivity are observed for all GeTe samples used showing that the concentration of Ge vacancies generating charge carriers is constant along the ingot. Very short 125Te NMR spin-relaxation time agrees well with high carrier concentration obtained from the Hall effect measurements. Our data show that at ~700 K, GeTe has a very large power factor, 42 ?Wcm-1K-2, much larger than that of any high efficiency thermoelectric telluride at these temperatures. Electronic and thermal properties of GeTe are compared to PbTe, another well-known thermoelectric material, where free charge carriers, holes or electrons, are generated by vacancies on Pb or Te sites, respectively. Discrepancy in the data for GeTe reported in literature can be attributed to the variation in the Ge:Te ratio of solidified samples as well as to different conditions of measurements.

None

2013-08-29T23:59:59.000Z

490

Electronic and thermal transport in GeTe: A versatile base for thermoelectric materials  

SciTech Connect (OSTI)

GeTe is a narrow-band gap semiconductor, where Ge vacancies generate free charge carriers, holes, forming a self-dopant degenerate system with p-type conductivity, and serves as a base for high-performance multicomponent thermoelectric materials. There is a significant discrepancy between the electronic and thermal transport data for GeTe-based materials reported in the literature, which obscures the baseline knowledge and prevents a clear understanding of the effect of alloying GeTe with various elements. A comprehensive study including XRD, SEM, EDS, Seebeck coefficient, electrical resistivity, thermal conductivity, and 125Te NMR of several GeTe samples was conducted. Similar Seebeck coefficient and electrical resistivity are observed for all GeTe samples used showing that the concentration of Ge vacancies generating charge carriers is constant along the ingot. Very short 125Te NMR spin-relaxation time agrees well with high carrier concentration obtained from the Hall effect measurements. Our data show that at ~700 K, GeTe has a very large power factor, 42 ?Wcm-1K-2, much larger than that of any high efficiency thermoelectric telluride at these temperatures. Electronic and thermal properties of GeTe are compared to PbTe, another well-known thermoelectric material, where free charge carriers, holes or electrons, are generated by vacancies on Pb or Te sites, respectively. Discrepancy in the data for GeTe reported in literature can be attributed to the variation in the Ge:Te ratio of solidified samples as well as to different conditions of measurements.

None

2013-08-29T23:59:59.000Z

491

Modeling Water Withdrawal and Consumption for Electricity Generation in the United States  

E-Print Network [OSTI]

Water withdrawals for thermoelectric cooling account for a significant portion of total water use in the United States. Any change in electrical energy generation policy and technologies has the potential to have a major ...

Strzepek, Kenneth M.

2012-06-15T23:59:59.000Z

492

Efficiency, Cost and Weight Trade-off in TE Power Generation...  

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

Power Generation System for Vehicle Exhaust Applications It contains a detailed co-optimization of the thermoelectric module with the heat sink and a study of the tradeoff between...

493

Origin of anomalous atomic vibrations in efficient thermoelectrics...  

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

Functional Materials for Energy Origin of anomalous atomic vibrations in efficient thermoelectrics revealed May 06, 2014 Figure 1: Comparison of S(Q,E) measured with INS (left) and...

494

Supporting Information: Holey Silicon as efficient thermoelectric material  

E-Print Network [OSTI]

Supporting Information: Holey Silicon as efficient thermoelectric material Jinyao Tang1, 3, 3 1 Department of Chemistry, 2 Department of Materials Science and Engineering, University of California, Berkeley, California 94720, USA. 3 Materials Sciences Division, Lawrence Berkeley National

Yang, Peidong

495

Controlling microstructure of nanocrystalline thermoelectrics through powder processing  

E-Print Network [OSTI]

Bismuth Telluride and its solid solutions are currently front running thermoelectric materials because of their high figure of merit. When processed via mechanical alloying to obtain nanocrystalline structures, their ...

Humphry-Baker, Samuel A

2014-01-01T23:59:59.000Z

496

Thermo-electrically pumped semiconductor light emitting diodes  

E-Print Network [OSTI]

Thermo-electric heat exchange in semiconductor light emitting diodes (LEDs) allows these devices to emit optical power in excess of the electrical power used to drive them, with the remaining power drawn from ambient heat. ...

Santhanam, Parthiban

2014-01-01T23:59:59.000Z

497

Thermoelectric skutterudite compositions and methods for producing the same  

DOE Patents [OSTI]

Compositions related to skutterudite-based thermoelectric materials are disclosed. Such compositions can result in materials that have enhanced ZT values relative to one or more bulk materials from which the compositions are derived. Thermoelectric materials such as n-type and p-type skutterudites with high thermoelectric figures-of-merit can include materials with filler atoms and/or materials formed by compacting particles (e.g., nanoparticles) into a material with a plurality of grains each having a portion having a skutterudite-based structure. Methods of forming thermoelectric skutterudites, which can include the use of hot press processes to consolidate particles, are also disclosed. The particles to be consolidated can be derived from (e.g., grinded from), skutterudite-based bulk materials, elemental materials, other non-Skutterudite-based materials, or combinations of such materials.

Ren, Zhifeng; Yang, Jian; Yan, Xiao; He, Qinyu; Chen, Gang; Hao, Qing

2014-11-11T23:59:59.000Z

498

Thermoelectric, thermionic and thermophotovoltaic energy conversion Ali Shakouri  

E-Print Network [OSTI]

of thermoelectric, ballistic thermionic and quasi diffusive thermionic energy converters are compared. First-state thermionic energy converters would be able to alleviate this trade off, thereby achieving a very high Single Barrier Heterostructure Thermionic Energy Converter Material 1 Mat

499

Thermoelectric Conversion of Wate Heat to Electricity in an IC...  

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

Wate Heat to Electricity in an IC Engine Powered Vehicle Thermoelectric Conversion of Wate Heat to Electricity in an IC Engine Powered Vehicle Presentation given at the 16th...

500

Quantum interference in thermoelectric molecular junctions: A toy model perspective  

SciTech Connect (OSTI)

Quantum interference (QI) phenomena between electronic states in molecular circuits offer a new opportunity to design new types of molecular devices such as molecular sensors, interferometers, and thermoelectric devices. Controlling the QI effect is a key challenge for such applications. For the development of single molecular devices employing QI effects, a systematic study of the relationship between electronic structure and the quantum interference is needed. In order to uncover the essential topological requirements for the appearance of QI effects and the relationship between the QI-affected line shape of the transmission spectra and the electronic structures, we consider a homogeneous toy model where all on-site energies are identical and model four types of molecular junctions due to their topological connectivities. We systematically analyze their transmission spectra, density of states, and thermoelectric properties. Even without the degree of freedom for on-site energies an asymmetric Fano peak could be realized in the homogeneous systems with the cyclic configuration. We also calculate the thermoelectric properties of the model systems with and without fluctuation of on-site energies. Even under the fluctuation of the on-site energies, the finite thermoelectrics are preserved for the Fano resonance, thus cyclic configuration is promising for thermoelectric applications. This result also suggests the possibility to detect the cyclic configuration in the homogeneous systems and the presence of the QI features from thermoelectric measurements.

Nozaki, Daijiro, E-mail: daijiro.nozaki@gmail.com, E-mail: research@nano.tu-dresden.de [Institute for Materials Science and Max Bergmann Center of Biomaterials, TU Dresden, 01062 Dresden (Germany); Avdoshenko, Stas M. [Department of Chemistry and Institute for Computational Engineering and Sciences, University of Texas at Austin, 100 E. 24th St. A1590, Austin, Texas 78712 (United States); Sevinçli, Hâldun [Department of Materials Science and Engineering, Izmir Institute of Technology, Gulbahce Kampusu 35430 Urla, Izmir (Turkey); Cuniberti, Gianaurelio [Institute for Materials Science and Max Bergmann Center of Biomaterials, TU Dresden, 01062 Dresden (Germany); Dresden Center for Computational Materials Science (DCCMS), TU Dresden, 01062 Dresden (Germany); Center for Advancing Electronics Dresden (cfAED), TU Dresden, 01062 Dresden (Germany)

2014-08-21T23:59:59.000Z