Sample records for multi-mission radioisotope thermoelectric

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

    SciTech Connect (OSTI)

    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

    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.

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

    SciTech Connect (OSTI)

    Felicione, Frank S.

    2009-12-01T23:59:59.000Z

    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.

  3. 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)

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

    2014-07-01T23:59:59.000Z

    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.

  4. A Saturn Ring Observer Mission Using Multi-Mission Radioisotope Power Systems

    SciTech Connect (OSTI)

    Abelson, Robert D.; Spilker, Thomas R.; Shirley, James H. [Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Mail Stop 301-445W, Pasadena, CA 91109-8099 (United States)

    2006-01-20T23:59:59.000Z

    Saturn remains one of the most fascinating planets within the solar system. To better understand the complex ring structure of this planet, a conceptual Saturn Ring Observer (SRO) mission is presented that would spend one year in close proximity to Saturn's A and B rings, and perform detailed observations and measurements of the ring particles and electric and magnetic fields. The primary objective of the mission would be to understand ring dynamics, including the microphysics of individual particles and small scale (meters to a few kilometers) phenomena such as particle agglomeration behavior. This would be accomplished by multispectral imaging of the rings at multiple key locations within the A and B rings, and by ring-particle imaging at an unprecedented resolution of 0.5 cm/pixel. The SRO spacecraft would use a Venus-Earth-Earth-Jupiter Gravity Assist (VEEJGA) and be aerocaptured into Saturn orbit using an advanced aeroshell design to minimize propellant mass. Once in orbit, the SRO would stand off from the ring plane 1 to 1.4 km using chemical thrusters to provide short propulsive maneuvers four times per revolution, effectively causing the SRO vehicle to 'hop' above the ring plane. The conceptual SRO spacecraft would be enabled by the use of a new generation of multi-mission Radioisotope Power Systems (RPSs) currently being developed by NASA and DOE. These RPSs include the Multi-Mission Radioisotope Thermoelectric Generator (MMRTG) and Stirling Radioisotope Generator (SRG). The RPSs would generate all necessary electrical power ({>=}330 We at beginning of life) during the 10-year cruise and 1-year science mission ({approx}11 years total). The RPS heat would be used to maintain the vehicle's operating and survival temperatures, minimizing the need for electrical heaters. Such a mission could potentially launch in the 2015-2020 timeframe, with operations at Saturn commencing in approximately 2030.

  5. 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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 1112011 Strategic2 OPAM615_CostNSAR - T enAmountCammie Croft Senior Advisor, DirectorDepartment

  6. 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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33Frequently Asked QuestionsDepartmentGas and|Hours(5-Unit) AreaEnergyofN E R G Y

  7. Alternative Fuel Sources for Radioisotope Thermoelectric Generators 

    E-Print Network [OSTI]

    Parker, Trevor Drake

    2014-09-18T23:59:59.000Z

    configurations and materials would ideally be examined as well. Possible fuel assembly designs have been hypothesized by Ambrosi at the Nuclear and Emerging Technologies for Space Conference (2012) [4]. Preliminary research has shown that Am-241, Cm-242, Po.... AMBROSI, et al., “Development and Testing of Americium-241 Radioisotope Thermoelectric Generator: Concept Designs and Breadboard System,” Nuclear and Emerging Technologies for Space, (2012). 5. M. RAGHEB, “Radioisotopes Power Production,” mragheb...

  8. Alternaive Fuel Sources For Radioisotope Thermoelectric Generators 

    E-Print Network [OSTI]

    Gonzalez, Evan Sebastain

    2015-04-23T23:59:59.000Z

    configurations and materials would ideally be examined as well. Possible fuel assembly designs have been hypothesized by Ambrosi at the Nuclear and Emerging Technologies for Space Conference (2012) [4]. Preliminary research has shown that Am-241, Cm-242, Po.... AMBROSI, et al., “Development and Testing of Americium-241 Radioisotope Thermoelectric Generator: Concept Designs and Breadboard System,” Nuclear and Emerging Technologies for Space, (2012). 5. M. RAGHEB, “Radioisotopes Power Production,” mragheb...

  9. Radioisotope thermoelectric generator reliability and safety

    SciTech Connect (OSTI)

    Campbell, R.; Klein, J.

    1989-01-01T23:59:59.000Z

    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.

  10. Radioisotope thermoelectric generator transport trailer system

    SciTech Connect (OSTI)

    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

    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}

  11. Procurement of a fully licensed radioisotope thermoelectric generator transportation system

    SciTech Connect (OSTI)

    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

    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.

  12. Procurement of a fully licensed radioisotope thermoelectric generator transportation system

    SciTech Connect (OSTI)

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

    1990-10-01T23:59:59.000Z

    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.

  13. Radioisotope thermoelectric generator transportation system subsystem 143 software development plan

    SciTech Connect (OSTI)

    King, D.A.

    1994-11-10T23:59:59.000Z

    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.

  14. A facility to remotely assemble radioisotope thermoelectric generators

    SciTech Connect (OSTI)

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

    1992-07-01T23:59:59.000Z

    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.

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

    SciTech Connect (OSTI)

    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

    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.

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

    SciTech Connect (OSTI)

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

    1997-01-01T23:59:59.000Z

    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.}

  17. Radioisotope thermoelectric generator licensed hardware package and certification tests

    SciTech Connect (OSTI)

    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

    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)

  18. Radioisotope thermoelectric generator/thin fragment impact test

    SciTech Connect (OSTI)

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

    1998-12-31T23:59:59.000Z

    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.

  19. Radioisotope thermoelectric generator/thin fragment impact test

    SciTech Connect (OSTI)

    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

    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.}

  20. End-on radioisotope thermoelectric generator impact tests

    SciTech Connect (OSTI)

    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

    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.}

  1. Radioisotope thermoelectric generator/thin fragment impact test

    SciTech Connect (OSTI)

    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

    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.

  2. End-on radioisotope thermoelectric generator impact tests

    SciTech Connect (OSTI)

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

    1997-01-01T23:59:59.000Z

    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.

  3. An overview of the Radioisotope Thermoelectric Generator Transporation System Program

    SciTech Connect (OSTI)

    McCoy, J.C.

    1995-10-01T23:59:59.000Z

    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.

  4. An overview of the Radioisotope Thermoelectric Generator Transportation System Program

    SciTech Connect (OSTI)

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

    1996-03-01T23:59:59.000Z

    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.}

  5. Analytical thermal model validation for Cassini radioisotope thermoelectric generator

    SciTech Connect (OSTI)

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

    1997-12-31T23:59:59.000Z

    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.

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

    SciTech Connect (OSTI)

    NONE

    1996-06-01T23:59:59.000Z

    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.

  7. The Electrodeposition of PbTe Nanowires for Thermoelectric Applications

    E-Print Network [OSTI]

    Hillman, Peter

    2012-01-01T23:59:59.000Z

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

  8. 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.

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

    E-Print Network [OSTI]

    Star, Kurt

    2013-01-01T23:59:59.000Z

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

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

    SciTech Connect (OSTI)

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

    1989-01-01T23:59:59.000Z

    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.

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

    SciTech Connect (OSTI)

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

    1995-01-20T23:59:59.000Z

    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}

  12. High Temperature Experimental Characterization of Microscale Thermoelectric Effects

    E-Print Network [OSTI]

    Favaloro, Tela

    2014-01-01T23:59:59.000Z

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

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

    SciTech Connect (OSTI)

    Kiebel, G.R.

    1991-09-01T23:59:59.000Z

    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.

  14. Radioisotope Thermoelectric Generator Package O-Ring Seal Material Validation Testing

    SciTech Connect (OSTI)

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

    1994-09-30T23:59:59.000Z

    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.

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

    SciTech Connect (OSTI)

    Satoh, J.A.

    1994-11-09T23:59:59.000Z

    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.

  16. National Aeronautics and Space Administration www.nasa.gov

    E-Print Network [OSTI]

    Waliser, Duane E.

    Radioisotope Power System -- a Multi-Mission Radioisotope Thermoelectric Generator (MMRTG) Science Instruments

  17. Radioisotope thermoelectric generator package o-ring seal material validation testing

    SciTech Connect (OSTI)

    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

    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}

  18. Quality Assurance Plan for Heat Source/Radioisotope Thermoelectric Generator Programs

    SciTech Connect (OSTI)

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

    1995-03-16T23:59:59.000Z

    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.

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

    SciTech Connect (OSTI)

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

    1996-03-01T23:59:59.000Z

    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.

  20. Structural testing of the Los Alamos National Laboratory Heat Source/Radioisotopic Thermoelectric Generator shipping container

    SciTech Connect (OSTI)

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

    1991-06-01T23:59:59.000Z

    The Heat Source/Radioisotopic Thermoelectric Generator shipping container is a Type B packaging design 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 the normal and hypothetical accident environments defined in Title 10 Code of Federal Regulations Part 71. A combination of testing and analysis is used to verify the adequacy of this package design. This report documents the test program portion of the design verification, using several prototype packages. Four types of testing were performed: 30-foot hypothetical accident condition drop tests in three orientations, 40-inch hypothetical accident condition puncture tests in five orientations, a 21 psi external overpressure test, and a normal conditions of transport test consisting of a water spray and a 4 foot drop test. 18 refs., 104 figs., 13 tabs.

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

    SciTech Connect (OSTI)

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

    1991-09-01T23:59:59.000Z

    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.

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

    SciTech Connect (OSTI)

    Sherrell, D.L.

    1992-06-01T23:59:59.000Z

    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.

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

    SciTech Connect (OSTI)

    Sherrell, D.L.

    1992-06-01T23:59:59.000Z

    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.

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

    SciTech Connect (OSTI)

    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

    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.

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

    SciTech Connect (OSTI)

    Becker, D.L.

    1997-05-01T23:59:59.000Z

    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.

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

    SciTech Connect (OSTI)

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

    1992-01-01T23:59:59.000Z

    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.

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

    SciTech Connect (OSTI)

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

    1992-12-31T23:59:59.000Z

    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.

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

    SciTech Connect (OSTI)

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

    1996-07-01T23:59:59.000Z

    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.

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

    SciTech Connect (OSTI)

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

    1996-11-01T23:59:59.000Z

    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.

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

    SciTech Connect (OSTI)

    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

    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)

  11. 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]

    Chen, Alic

    2011-01-01T23:59:59.000Z

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

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

    SciTech Connect (OSTI)

    Mowery, A.L. Jr.

    1993-09-21T23:59:59.000Z

    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.

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

    SciTech Connect (OSTI)

    Mowery, A.L. Jr.

    1992-12-31T23:59:59.000Z

    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.

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

    DOE Patents [OSTI]

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

    1993-01-01T23:59:59.000Z

    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.

  15. Vibration Testing of the Pluto/New Horizons Radioisotope Thermoelectric Generator

    SciTech Connect (OSTI)

    Charles D. Griffin

    2006-06-01T23:59:59.000Z

    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.

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

    SciTech Connect (OSTI)

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

    1995-10-01T23:59:59.000Z

    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.).

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

    SciTech Connect (OSTI)

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

    1996-03-01T23:59:59.000Z

    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.}

  18. --No Title--

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

    sets used in the generator. This is the first launch using a new radioisotope thermoelectric generator, the Multi-Mission Radioisotope Thermoelectric Generator. "ORNL has been...

  19. --No Title--

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

    sets used in the generator. This is the first launch using a new radioisotope thermoelectric generator, the Multi-Mission Radioisotope Thermoelectric Generator." ORNL's...

  20. DatosdelaNASA Plan de contingencias del lanzamiento

    E-Print Network [OSTI]

    termoeléctrico de radioisótopos multimisión (Multi-Mission Radioisotope Thermoelectric Generator, MMRTG). El

  1. Secretary's Honor Awards: Recognizing Employee Excellence | Department...

    Office of Environmental Management (EM)

    at a reduced cost to taxpayers. Mars Science Laboratory Multi-Mission Radioisotope Thermoelectric Generator team for delivering the Generator for the NASA's Mars Science laboratory...

  2. Curiosity rover zaps Mars for life signs

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

    trio is an essential component of the heat-producing Multi-Mission Radioisotope Thermoelectric Generator unit. It powers the rover and keeps the instruments from freezing solid...

  3. 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...

  4. Thermoelectrics Partnership: Automotive Thermoelectric Modules...

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

    More Documents & Publications Novel Nanostructured Interface Solution for Automotive Thermoelectric Modules Application Thermoelectrics Partnership: Automotive...

  5. BuildingaThermoelectricMug This rllorrfh,s

    E-Print Network [OSTI]

    Lorenz, Ralph D.

    (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

  6. Thermoelectric Generators 1. Thermoelectric generator

    E-Print Network [OSTI]

    Lee, Ho Sung

    1 Thermoelectric Generators HoSung Lee 1. Thermoelectric generator 1.1 Basic Equations In 1821 effects are called the thermoelectric effects. The mechanisms of thermoelectricity were not understood. Cold Hot I - -- - - - - -- Figure 1 Electron concentration in a thermoelectric material. #12;2 A large

  7. Thermoelectrics Partnership: Automotive Thermoelectric Modules...

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

    ace067goodson2011o.pdf More Documents & Publications Thermoelectrics Partnership: Automotive Thermoelectric Modules with Scalable Thermo- and Electro-Mechanical Interfaces Novel...

  8. The ASDC Multi Mission Interactive Archive: on line analysis of the Swift/XRT data

    SciTech Connect (OSTI)

    Stratta, G.; Capalbi, M.; Perri, M. [ASDC, via G. Galilei, I-00044, Frascati (Italy); Giommi, P. [ASI-ASDC c/o ESRIN, Via G. Galilei, I-00040, Frascati (Italy)

    2010-10-15T23:59:59.000Z

    We present the Swift/XRT Interactive Archive and the On-line Analysis tool developed at the ASI Science Data Center (ASDC) as part of the Multi Mission Interactive Archive. The On-line Analysis enables to run the Swift/XRT software task ''xrtpipeline'' on any desired XRT observation present in the Swift data archive maintained at ASDC, directly on the web. On-line imaging (with XIMAGE), spectral (with XSPEC) and timing data analysis (with LCURVE) can be performed. At the same time, spectra, light curves, effective area, exposure map and response matrix are promptly available for download to the user for any off-line analysis.

  9. JUNE 8, 2011 AUDIT REPORT

    E-Print Network [OSTI]

    Christian, Eric

    Propulsion Laboratory MMRTG Multi-Mission Radioisotope Thermoelectric Generator MSL Mars Science Laboratory and interdependence of its 10 science instruments; and a new type of power generating system. Figure 1. Artist

  10. 2014 NASA Planetary Science Summer School Applications Open NASA is accepting applications from science and engineering post-docs,

    E-Print Network [OSTI]

    Rathbun, Julie A.

    Thermoelectric Generators (MMRTG). The session in August will have a targeted focus on spacecraft power systems power system trade-offs, including the use of solar electric vs. Multi-mission Radioisotope

  11. Thermoelectric module

    DOE Patents [OSTI]

    Kortier, William E. (Columbus, OH); Mueller, John J. (Columbus, OH); Eggers, Philip E. (Columbus, OH)

    1980-07-08T23:59:59.000Z

    A thermoelectric module containing lead telluride as the thermoelectric mrial is encapsulated as tightly as possible in a stainless steel canister to provide minimum void volume in the canister. The lead telluride thermoelectric elements are pressure-contacted to a tungsten hot strap and metallurgically bonded at the cold junction to iron shoes with a barrier layer of tin telluride between the iron shoe and the p-type lead telluride element.

  12. 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...

  13. Thermoelectric system

    DOE Patents [OSTI]

    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

    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.

  14. Assembly of radioisotope power systems at Westinghouse Hanford Company

    SciTech Connect (OSTI)

    Alderman, C.J.

    1990-04-01T23:59:59.000Z

    Long-term space flight requires reliable long-term power sources. For the purpose of supplying a constant supply of power in deep space, the radioisotope thermoelectric generator has proven to be a successful power source. Westinghouse Hanford Company is installing the Radioisotope Power Systems Facility which is located in the Fuels and Material Examination Facility on the Hanford Site near Richland, Washington, for assembling the generators. The radioisotope thermoelectric generator assembly process is base upon one developed at Mound Laboratory in Miamisburg, Ohio (presently operated by EG G Mound Applied Technologies). Westinghouse Hanford Company is modernizing the process to ensure the heat source assemblies are produced in a manner that maximizes operator safety and is consistent with today's environmental and operational safety standards. The facility is being prepared to assemble the generators required by the National Aeronautics and Space Administration missions for CRAF (Comet Rendezvous Asteroid Flyby) in 1995 and Cassini, an investigation of Saturn and its moons, in 1996. The facility will also have the capability to assemble larger radioisotope power generators designed for dynamic power generation. 4 refs., 11 figs.

  15. High temperature thermoelectrics

    DOE Patents [OSTI]

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

    2014-09-23T23:59:59.000Z

    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.

  16. High efficiency radioisotope thermophotovoltaic prototype generator

    SciTech Connect (OSTI)

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

    1995-10-01T23:59:59.000Z

    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.

  17. NSF/DOE Thermoelectric Partnership: High-Performance Thermoelectric...

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

    High-Performance Thermoelectric Devices Based on Abundant Silicide Materials for Vehicle Waste Heat Recovery NSFDOE Thermoelectric Partnership: High-Performance Thermoelectric...

  18. Space Technology and Applications International Forum Proceedings, Albuquerque, New Mexico, January 2000 Miniaturized Radioisotope Solid State Power Sources

    E-Print Network [OSTI]

    thermoelectric generators (RTGs) have been successfully used for a number of deep space missions RTGs. However 2000 Miniaturized Radioisotope Solid State Power Sources J.-P. Fleurial, G.J. Snyder, J. Patel, J-pierre.fleurial@jpl.nasa.gov Abstract. Electrical power requirements for the next generation of deep space missions cover a wide range

  19. Radioisotopes: Energy for Space Exploration

    ScienceCinema (OSTI)

    Carpenter, Bob; Green, James; Bechtel, Ryan

    2013-05-29T23:59:59.000Z

    Through a strong partnership between the Energy Department's office of Nuclear Energy and NASA, Radioisotope Power Systems have been providing the energy for deep space exploration.

  20. 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 ......

  1. Scalable Routes to Efficient Thermoelectric Materials

    E-Print Network [OSTI]

    Feser, Joseph Patrick

    2010-01-01T23:59:59.000Z

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

  2. 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...

  3. Choosing the Right Electrical Power Supply Scientists could find clues for answering these and oth-

    E-Print Network [OSTI]

    lifetimes. An eighth RPS configuration, called the Multi-Mission Radioisotope Thermoelectric Generator a Radioisotope Power System (RPS). An RPS converts the heat generated by the natural decay of the radioactive in space and on plan- etary surfaces. Developing and Improving RPS Technology Seven generations of RPS have

  4. Mission Overview Mars Science Laboratory

    E-Print Network [OSTI]

    Christian, Eric

    radioisotope power generator. The multi- mission radioisotope thermoelectric generator produces electricity an operating lifespan on Mars' surface of a full Mars year (687 Earth days) or more. At launch, the generator, computers and radio. Warm fluids heated by the generator's excess heat are plumbed throughout the rover

  5. Radioisotope Thermoelectric Generator F7 Flight Unit Acceptance Buy Off

    SciTech Connect (OSTI)

    none,

    1997-02-20T23:59:59.000Z

    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.

  6. Potential improvements in SiGe radioisotope thermoelectric generator performance

    SciTech Connect (OSTI)

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

    1999-01-01T23:59:59.000Z

    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.}

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

    SciTech Connect (OSTI)

    Not Available

    1992-12-31T23:59:59.000Z

    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.

  8. Nanocomposites as thermoelectric materials

    E-Print Network [OSTI]

    Hao, Qing

    2010-01-01T23:59:59.000Z

    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, ...

  9. Radioisotope Stirling Generator Options for Pluto Fast Flyby Mission

    SciTech Connect (OSTI)

    Schock, Alfred

    1993-10-01T23:59:59.000Z

    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.

  10. Radioisotope Stirling Generator Options for Pluto Fast Flyby Mission

    SciTech Connect (OSTI)

    Schock, Alfred

    2012-01-19T23:59:59.000Z

    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 2 copies in the file.

  11. Thermoelectric Temperature Control

    E-Print Network [OSTI]

    Saffman, Mark

    NOTE 201TM TECHNICAL Optimizing Thermoelectric Temperature Control Systems #12;2 May 1995 92-040000A © 1995 Wavelength Electronics, Inc. Thermoelectric coolers (TECs) are used in a variety understanding of thermal management techniques and carefully select the thermoelectric module, temperature

  12. Thermoelectric materials having porosity

    DOE Patents [OSTI]

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

    2014-08-05T23:59:59.000Z

    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.

  13. Thermoelectric heat exchange element

    DOE Patents [OSTI]

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

    2007-08-14T23:59:59.000Z

    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.

  14. Rare earth thermoelectrics

    SciTech Connect (OSTI)

    Mahan, G.D.

    1997-07-01T23:59:59.000Z

    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.

  15. Vehicular Thermoelectric Applications

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

    Modules Available Energy in Engine Exhaust BMW Series 5 , Model Year 2011, 3.0 Liter Gasoline Engine w Thermoelectric Generator Funding Opportunity Announcement...

  16. Solar Thermoelectric Energy Conversion

    Broader source: Energy.gov [DOE]

    Efficiencies of different types of solar thermoelectric generators were predicted using theoretical modeling and validated with measurements using constructed prototypes under different solar intensities

  17. 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...

  18. Vehicular Applications of Thermoelectrics

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

    gas. Thermoelectric Element at Toshiba Material Nov. 2007 Shuichi Hase Sango Co. Ltd. Heat-Recovery for ICE Automobiles and Thermal Electric Generation Komatsu Diesel Engine with...

  19. NASA Reference Publication 1036 ALSEP Termination Report

    E-Print Network [OSTI]

    Rathbun, Julie A.

    ..................... Dust Detector ...................... Radioisotope Thermoelectric Generator .......... EASEPPassive

  20. Characterizing the thermal efficiency of thermoelectric modules

    E-Print Network [OSTI]

    Phillips, Samuel S

    2009-01-01T23:59:59.000Z

    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 ...

  1. Scalable Routes to Efficient Thermoelectric Materials

    E-Print Network [OSTI]

    Feser, Joseph Patrick

    2010-01-01T23:59:59.000Z

    P. D. Yang, "Enhanced thermoelectric performance of roughHigh efficiency thermoelectric materials consisting ofG. Chen, and Z. F. Ren, "High-thermoelectric performance of

  2. Holey Silicon as an Efficient Thermoelectric Material

    E-Print Network [OSTI]

    Tang, Jinyao

    2011-01-01T23:59:59.000Z

    Silicon as Efficient Thermoelectric Material Jinyao Tang 1,This work investigated the thermoelectric properties of thinat room temperature, the thermoelectric performance of HS is

  3. Assessment of dynamic energy conversion systems for radioisotope heat sources

    SciTech Connect (OSTI)

    Thayer, G.R.; Mangeng, C.A.

    1985-06-01T23:59:59.000Z

    The use of dynamic conversion systems to convert the heat generated in a 7500 W(t) 90 Sr radioisotopic heat source to electricity is examined. The systems studies were Stirling; Brayton Cycle; three organic Rankines (ORCs) (Barber-Nichols/ORMAT, Sundstrand, and TRW); and an organic Rankine plus thermoelectrics. The systems were ranked for a North Warning System mission using a Los Alamos Multiattribute Decision Theory code. Three different heat source designs were used: case I with a beginning of life (BOL) source temperature of 640 C, case II with a BOL source temperature of 745/sup 0/C, and case III with a BOL source temperature of 945/sup 0/C. The Stirling engine system was the top-ranked system of cases I and II, closely followed by the ORC systems in case I and ORC plus thermoelectrics in case II. The Brayton cycle system was top-ranked for case III, with the Stirling engine system a close second. The use of /sup 238/Pu in heat source sizes of 7500 W(t) was examined and found to be questionable because of cost and material availability and because of additional requirements for analysis of safeguards and critical mass.

  4. Complex oxides useful for thermoelectric energy conversion

    DOE Patents [OSTI]

    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

    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.

  5. Proactive Strategies for Designing Thermoelectric Materials for...

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

    More Documents & Publications Proactive Strategies for Designing Thermoelectric Materials for Power Generation Thermoelectric Couple Demonstration of (In,...

  6. Trends in Thermoelectric Properties with Nanostructure: Ferecrystals...

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

    Thermoelectric Properties with Nanostructure: Ferecrystals with Designed Nanoarchitecture Trends in Thermoelectric Properties with Nanostructure: Ferecrystals with Designed...

  7. Proactive Strategies for Designing Thermoelectric Materials for...

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

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

  8. The Industrialization of Thermoelectric Power Generation Technology...

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

    The Industrialization of Thermoelectric Power Generation Technology The Industrialization of Thermoelectric Power Generation Technology Presents module and system requirements for...

  9. Ferecrystals: Thermoelectric Materials Poised Between the Crystalline...

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

    Ferecrystals: Thermoelectric Materials Poised Between the Crystalline and Amorphous States Ferecrystals: Thermoelectric Materials Poised Between the Crystalline and Amorphous...

  10. 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,...

  11. 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...

  12. Novel Nanostructured Interface Solution for Automotive Thermoelectric...

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

    Nanostructured Interface Solution for Automotive Thermoelectric Modules Application Novel Nanostructured Interface Solution for Automotive Thermoelectric Modules Application...

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

    SciTech Connect (OSTI)

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

    1994-01-16T23:59:59.000Z

    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.

  14. Radioisotope Thermophotovoltaic (RTPV) Generator and Its Applicability to an Illustrative Space Mission

    SciTech Connect (OSTI)

    Schock, A.; Mukunda, M.; Or, T.; Kumar, V.; Summers, G.

    1994-02-14T23:59:59.000Z

    The paper describes the results of a DOE-sponsored design study of a radioisotope thermophotovoltaic generator (RTPV), to complement similar studies of Radioisotope Thermoelectric Generators (RTGs) and Stirling Generators (RSGs) previously published by the author. Instead of conducting a generic study, it was decided to focus the design effort by directing it at a specific illustrative 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 post-encounter cruise lasting up to one year.

  15. The thermoelectric process

    SciTech Connect (OSTI)

    Vining, C.B.

    1997-07-01T23:59:59.000Z

    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.

  16. Proposed strontium radiosotope thermoelectric generator fuel encapsulation facility

    SciTech Connect (OSTI)

    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

    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.

  17. New materials and devices for thermoelectric applications

    SciTech Connect (OSTI)

    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

    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.

  18. Bipolar thermoelectric devices

    E-Print Network [OSTI]

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

    2004-01-01T23:59:59.000Z

    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 ...

  19. 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....

  20. Solar Thermoelectrics Mercouri Kanatzidis,

    E-Print Network [OSTI]

    Kanatzidis, Mercouri G

    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

  1. Thermoelectric transport in superlattices

    SciTech Connect (OSTI)

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

    1997-07-01T23:59:59.000Z

    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.

  2. ORNL's medical radioisotope project sees centennial campaign...

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

    actinium-225 processing, which provides radioisotopes for medical uses that include cancer treatment. Actinium-225 is a source for bismuth-213, a short-lived, alpha-emitting...

  3. Withdrawal from Production and Distribution of the Radioisotope...

    Energy Savers [EERE]

    Withdrawal from Production and Distribution of the Radioisotope Germanium-68 Used for Calibration Sources Withdrawal from Production and Distribution of the Radioisotope...

  4. New Horizons Mission Powered by Space Radioisotope Power Systems...

    Energy Savers [EERE]

    New Horizons Mission Powered by Space Radioisotope Power Systems New Horizons Mission Powered by Space Radioisotope Power Systems January 30, 2008 - 6:47pm Addthis Artist's concept...

  5. Engineering Nanomaterials towards Energy Harvesting and Virological Applications

    E-Print Network [OSTI]

    Weng, Ding

    2012-01-01T23:59:59.000Z

    as radioisotope thermoelectric generators, extremely longsuch as radioisotope thermoelectric generators which are

  6. Superconducting thermoelectric generator

    DOE Patents [OSTI]

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

    1994-01-01T23:59:59.000Z

    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.

  7. Synthetic thermoelectric materials comprising phononic crystals

    DOE Patents [OSTI]

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

    2013-08-13T23:59:59.000Z

    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.

  8. Thermoelectrically cooled water trap

    DOE Patents [OSTI]

    Micheels, Ronald H. (Concord, MA)

    2006-02-21T23:59:59.000Z

    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.

  9. Green thermoelectrics: Observation and analysis of plant thermoelectric response

    E-Print Network [OSTI]

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

    2015-01-01T23:59:59.000Z

    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.

  10. List of DOE radioisotope customers with summary of radioisotope shipments, FY 1986

    SciTech Connect (OSTI)

    Lamar, D.A.

    1987-10-01T23:59:59.000Z

    This document describes radioisotope distribution from DOE facilities to private firms including foreign and other DOE facilities. The information is divided into five sections: (1)isotope suppliers, facility contact, and isotopes or services supplied; (2) customers, suppliers, and isotopes purchased; (3) isotopes purchased cross-referenced with customer numbers; (4) geographic locations of radioisotope customers; and (5) radioisotope sales and transfers for fiscal year 1986.

  11. Nanostructured High Temperature Bulk Thermoelectric Energy Conversion...

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

    Thermoelectric Energy Conversion for Efficient Waste Heat Recovery PI - Chris Caylor, GMZ Director of Thermoelectric Systems GMZ Team: Bed Poudel, Giri Joshi, Jonathan D'Angelo,...

  12. Correlation Between Structure and Thermoelectric Properties of...

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

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

  13. Recent Device Developments with Advanced Bulk Thermoelectric...

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

    Device Developments with Advanced Bulk Thermoelectric Materials at RTI Recent Device Developments with Advanced Bulk Thermoelectric Materials at RTI Reviews work in engineered...

  14. 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...

  15. Skutterudite Thermoelectric Generator For Automotive Waste Heat...

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

    Skutterudite Thermoelectric Generator For Automotive Waste Heat Recovery Gregory P. Meisner General Motors Global Research & Development March 21, 2012 3rd Thermoelectric...

  16. Development of Thermoelectric Technology for Automotive Waste...

    Energy Savers [EERE]

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

  17. Vehicle Fuel Economy Improvement through Thermoelectric Waste...

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

    Fuel Economy Improvement through Thermoelectric Waste Heat Recovery Vehicle Fuel Economy Improvement through Thermoelectric Waste Heat Recovery 2005 Diesel Engine Emissions...

  18. Integrated Design and Manufacturing of Thermoelectric Generator...

    Office of Environmental Management (EM)

    High-Performance Thermoelectric Devices Based on Abundant Silicide Materials for Vehicle Waste Heat Recovery High-Performance Thermoelectric Devices Based on Abundant Silicide...

  19. 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...

  20. Investigations of Interfacial Structure in Thermoelectric Tellurides...

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

    More Documents & Publications Thermoelectric Materials by Design, Computational Theory and Structure Strategies for High Thermoelectric zT in Bulk Materials Strategies for...

  1. List of DOE radioisotope customers with summary of radioisotope shipments, FY 1987

    SciTech Connect (OSTI)

    Lamar, D.A.; Van Houten, N.C.

    1988-08-01T23:59:59.000Z

    This edition of the radioisotope customer list was prepared at the request of the Office of Health and Environmental Research (ER-73), Office of Energy Research, US Department of Energy (DOE). This document describes radioisotope distribution from DOE facilities to private firms, including foreign and other DOE facilities. The information is divided into five sections: 1) isotope suppliers, facility contact, and isotopes or services supplied; 2) customers, suppliers, and isotopes purchased; 3) isotopes purchased cross- referenced with customer numbers; 4) geographic locations of radioisotope customers; and 5) radioisotope sales and transfers for fiscal year 1987.

  2. Design, Analysis, and Optimization of a Radioisotope Thermophotovoltaic (RTPV) Generator, and its Applicability to an Illustrative Space Mission

    SciTech Connect (OSTI)

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

    1994-10-01T23:59:59.000Z

    Paper presented at the 45th Congress of the IAF in Jerusalem, Israel, October 1994. The paper describes the results of a DOE-sponsored design study of a radioisotope thermophotovoltaic generator (RTPV), to complement similar studies of Radioisotope Thermoelectric Generators (RTGs) and Stirling Generators (RSGs) previously published by the authors. To focus the design effort, it was decided to direct it at a specific illustrative space mission, Pluto Fast Flyby (PFF). That mission, under study by the JPL, envisages a direct eight to nine-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 six-week post-encounter cruise.

  3. Total thermoelectric-power withdrawals Freshwater thermoelectric-power withdrawals Saline-water thermoelectric-power withdrawals

    E-Print Network [OSTI]

    Total thermoelectric-power withdrawals Freshwater thermoelectric-power withdrawals Saline-water thermoelectric-power withdrawals Louisiana New Hampshire Florida Idaho Washington Oregon Nevada California New,000 9,000 to 13,000 Thermoelectric-power withdrawals by water quality and State, 2005. Estimated Use

  4. 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...

  5. Thermoelectric effect in very thin film Pt/Au thermocouples

    E-Print Network [OSTI]

    Salvadori, M.C.; Vaz, A.R.; Teixeira, F.S.; Cattani, M.; Brown, I.G.

    2006-01-01T23:59:59.000Z

    TABLE I. Measured thermoelectric power S for samples ofThermoelectric effect in very thin film Pt/Au thermocouplesthickness dependence of the thermoelectric power of Pt films

  6. Thermoelectric transport in the coupled valence-band model

    E-Print Network [OSTI]

    Ramu, Ashok; Cassels, Laura; Hackman, Nathan; Lu, Hong; Zide, Joshua; Bowers, John E.

    2011-01-01T23:59:59.000Z

    109, 033704 ?2011? Thermoelectric transport in the coupledapplied to the problem of thermoelectric transport in p-typeef?ciency p-type thermoelectric material, are calculated and

  7. Design of bulk thermoelectric modules for integrated circuit thermal management

    E-Print Network [OSTI]

    Fukutani, K; Shakouri, A

    2006-01-01T23:59:59.000Z

    cooling enhancement with thermoelectric coolers,” Trans.M. S. Dresselhaus, “Thermoelectric ?gure of merit of a one-A. Shakouri, “Improved thermoelectric power factor in metal-

  8. Effect of Nanoparticles on Electron and Thermoelectric Transport

    E-Print Network [OSTI]

    2009-01-01T23:59:59.000Z

    on Electron and Thermoelectric Transport MONA ZEBARJADI, 1,5can enhance the thermoelectric performance by reducing thepredictions for the thermoelectric properties such as the

  9. 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...

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

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

    Purdue GM Partnership on Thermoelectrics for Automotive Waste Heat Recovery NSFDOE Thermoelectrics Partnership: Purdue GM Partnership on Thermoelectrics for Automotive Waste...

  11. Superconducting thermoelectric generator

    DOE Patents [OSTI]

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

    1998-05-05T23:59:59.000Z

    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.

  12. Superconducting thermoelectric generator

    DOE Patents [OSTI]

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

    1998-01-01T23:59:59.000Z

    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.

  13. Superconducting thermoelectric generator

    DOE Patents [OSTI]

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

    1996-01-01T23:59:59.000Z

    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.

  14. High performance thermoelectric nanocomposite device

    DOE Patents [OSTI]

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

    2011-10-25T23:59:59.000Z

    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.

  15. Annual Technical Progress Report of Radioisotope Power Systems Materials Production and Technology Program Tasks for October 1, 2006 Through September 30, 2007

    SciTech Connect (OSTI)

    King, James F [ORNL

    2008-04-01T23:59:59.000Z

    The Office of Radioisotope Power Systems of the Department of Energy (DOE) provides Radioisotope Power Systems (RPS) for applications where conventional power systems are not feasible. For example, radioisotope thermoelectric generators were supplied by the DOE to the National Aeronautics and Space Administration for deep space missions including the Cassini Mission launched in October of 1997 to study the planet Saturn. For the Cassini Mission, ORNL produced carbon-bonded carbon fiber (CBCF) insulator sets, iridium alloy blanks and foil, and clad vent sets (CVS) used in the generators. The Oak Ridge National Laboratory (ORNL) has been involved in developing materials and technology and producing components for the DOE for more than three decades. This report reflects program guidance from the Office of Radioisotope Power Systems for fiscal year (FY) 2007. Production activities for prime quality (prime) CBCF insulator sets, iridium alloy blanks and foil, and CVS are summarized in this report. Technology activities are also reported that were conducted to improve the manufacturing processes, characterize materials, or to develop information for new radioisotope power systems.

  16. Thermoelectric system for an engine

    DOE Patents [OSTI]

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

    2010-06-22T23:59:59.000Z

    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.

  17. Manufacture of thermoelectric generator structures by fiber drawing

    DOE Patents [OSTI]

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

    2014-11-18T23:59:59.000Z

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

  18. Thermal Strategies for High Efficiency Thermoelectric Power Generation...

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

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

  19. Develop Thermoelectric Technology for Automotive Waste Heat Recovery...

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

    More Documents & Publications Develop Thermoelectric Technology for Automotive Waste Heat Recovery Engineering and Materials for Automotive Thermoelectric Applications...

  20. 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...

  1. Develop Thermoelectric Technology for Automotive Waste Heat Recovery...

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

    More Documents & Publications Develop Thermoelectric Technology for Automotive Waste Heat Recovery Cost-Competitive Advanced Thermoelectric Generators for Direct...

  2. 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...

  3. 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...

  4. Concentrated Thermoelectric Power

    Broader source: Energy.gov [DOE]

    This fact sheet describes a concentrated solar hydroelectric power project awarded under the DOE's 2012 SunShot Concentrating Solar Power R&D award program. The team, led by MIT, is working to demonstrate concentrating solar thermoelectric generators with >10% solar-to-electrical energy conversion efficiency while limiting optical concentration to less than a factor of 10 and potentially less than 4. When combined with thermal storage, CSTEGs have the potential to provide electricity day and night using no moving parts at both the utility and distributed scale.

  5. Thermoelectric generator for motor vehicle

    DOE Patents [OSTI]

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

    1997-04-29T23:59:59.000Z

    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.

  6. List of DOE radioisotope customers with summary of radioisotope shipments, FY 1980

    SciTech Connect (OSTI)

    Burlison, J.S. (comp.)

    1981-08-01T23:59:59.000Z

    The sixteenth edition of the radioisotope customer list was prepared at the request of the Office of Health and Environmental Research, Office of energy Research, Department of Energy (DOE). This document lists DOE's radioisotope production and distribution activities by its facilities at Argonne National Laboratory; Pacific Northwest Laboratory; Brookhaven National Laboraory; Hanford Engineering Development Laboratory; Idaho Operations Office; Los Alamos Scientific Laboratory; Mound Facility; Oak Ridge National Laboratory; Savannah River Laboratory; and UNC Nuclear Industries, Inc. The information is divided into five sections: (1) isotope suppliers, facility, contracts and isotopes or services supplied; (2) alphabetical list of customers, and isotopes purchased; (3) alphabetical list of isotopes cross-referenced to customer numbers; (4) geographical location of radioisotope customers; and (5) radioisotope sales and transfers-FY 1980.

  7. Thermoelectric device characterization and solar thermoelectric system modeling

    E-Print Network [OSTI]

    Muto, Andrew (Andrew Jerome)

    2011-01-01T23:59:59.000Z

    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 ...

  8. Modeling the thermoelectric properties of bulk and nanocomposite thermoelectric materials

    E-Print Network [OSTI]

    Minnich, Austin (Austin Jerome)

    2008-01-01T23:59:59.000Z

    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, ...

  9. Effect of Inert Cover Gas on Performance of Radioisotope Stirling Space Power System

    SciTech Connect (OSTI)

    Carpenter, Robert; Kumar, V; Ore, C; Schock, Alfred

    2001-01-01T23:59:59.000Z

    This paper describes an updated Orbital design of a radioisotope Stirling power system and its predicted performance at the beginning and end of a six-year mission to the Jovian moon Europa. The design is based on General Purpose Heat Source (GPHS) modules identical to those previously developed and safety-qualified by the Department of Energy (DOE) which were successfully launched to Jupiter and Saturn by the Jet Propulsion Laboratory (JPL). In each generator, the heat produced by the decay of the Pu-238 isotope is converted to electric power by two free-piston Stirling engines and linear alternators developed by Stirling Technology Company (STC), and their rejected waste heat is transported to radiators by heat pipes. The principal difference between the proposed system design and previous Orbital designs (Or et al. 2000) is the thermal insulation between the heat source and the generator's housing. Previous designs had employed multifoil insulation, whereas the design described here employs Min-K-1800 thermal insulation. Such insulation had been successfully used by Teledyne and GE in earlier RTGs (Radioisotope Thermoelectric Generators). Although Min-K is a much poorer insulator than multifoil in vacuum and requires a substantially greater thickness for equivalent performance, it offers compensating advantages. Specifically it makes it possible to adjust the generator's BOM temperatures by filling its interior volume with inert cover gas. This makes it possible to meet the generator's BOM and EOM performance goals without exceeding its allowable temperature at the beginning of the mission.

  10. NASA's Planetary Science Program Support of Radioisotope

    E-Print Network [OSTI]

    Rathbun, Julie A.

    500 1000 1500 2000 MMRTG ASRG Total Thermal Power Waste Heat Electric power = 1 GPHS block 7 #12NASA's Planetary Science Program Support of Radioisotope Power Capability James L. Green, Director timeline · ASRG and MMRTG systems and plans · DoE Infrastructure Review · Summary 2 #12;Over 50 years

  11. Analysis, Optimization, and Assessment of Radioisotope Thermophotovoltaic System Design for an Illustrative Space Mission

    SciTech Connect (OSTI)

    Schock, Alfred; Mukunda, Meera; Summers, G.

    1994-06-28T23:59:59.000Z

    A companion paper presented at this conference described the design of a Radioisotope Thermophotovoltaic (RTPV) Generator for an illustrative space mission (Pluto Fast Flyby). It presented a detailed design of an integrated system consisting of a radioisotope heat source, a thermophotovoltaic converter, and an optimized heat rejection system. The present paper describes the thermal, electrical, and structural analyses which led to that optimized design, and compares the computed RTPV performance to that of a Radioisotope Thermoelectric Generator (RTG) designed for the same mission. RTPV's are of course much less mature than RTGs, but our results indicate that - when fully developed - they could result in a 60% reduction of the heat source's mass, cost, and fuel loading, a 50% reduction of generator mass, a tripling of the power system's specific power, and a quadrupling of its efficiency. The paper concludes by briefly summarizing the RTPV's current technology status and assessing its potential applicability for the PFF mission. For other power systems (e.g. RTGs), demonstrating their flight readiness for a long mission is a very time-consuming process to determine the long-term effect of temperature-induced degradation mechanisms. But for the case of the described RTPV design, the paper lists a number of factors, primarily its cold (0 to 10 degrees C) converter temperature, that may greatly reduce the need for long-term tests to demonstrate generator lifetime. In any event, our analytical results suggest that the RTPV generator, when developed by DOE and/or NASA, would be quite valuable not only for the Pluto mission but also for other future missions requiring small, long-lived, low mass generators. Another copy is in the Energy Systems files.

  12. Analysis, optimization, and assessment of radioisotope thermophotovoltaic system design for an illustrative space mission

    SciTech Connect (OSTI)

    Schock, A.; Mukunda, M.; Or, C.; Summers, G. [Fairchild Space and Defense Corporation, Germantown, Maryland 20874 (United States)

    1995-01-05T23:59:59.000Z

    A companion paper presented at this conference described the design of a Radioisotope Thermophotovoltaic (RTPV) Generator for an illustrative space mission (Pluto Fast Flyby). It presented a detailed design of an integrated system consisting of a radioisotope heat source, a thermophotovoltaic converter, and an optimized heat rejection system. The present paper describes the thermal, electrical, and structural analyses which led to that optimized design, and compares the computed RTPV performance to that of a Radioisotope Thermoelectric Generator (RTG) designed for the same mission. RTPVs are of course much less mature than RTGs, but our results indicate that---when fully developed---they could result in a 60% reduction of the heat source`s mass, cost, and fuel loading, a 50% reduction of generator mass, a tripling of the power system`s specific power, and a quadrupling of its efficiency. The paper concludes by briefly summarizing the RTPV`s current technology status and assessing its potential applicability for the PFF mission. For other power systems (e.g., RTGs), demonstrating their flight readiness for a long mission is a very time-consuming process to determine the long-term effect of temperature-induced degradation mechanisms. But for the case of the described RTPV design, the paper lists a number of factors, primarily its cold (0 to 10 {degree}C) converter temperature, that may greatly reduce the need for long-term tests to demonstrate generator lifetime. In any event, our analytical results suggest that the RTPV generator, when developed by DOE and/or NASA, would be quite valuable not only for the Pluto mission but also for other future missions requiring small, long-lived, low-mass generators. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.

  13. Thermoelectric properties of nanoporous Ge

    E-Print Network [OSTI]

    Lee, Joo-Hyoung

    We computed thermoelectric properties of nanoporous Ge (np-Ge) with aligned pores along the [001] direction through a combined classical molecular dynamics and first-principles electronic structure approach. A significant ...

  14. Thermoelectrics run hot and cold

    SciTech Connect (OSTI)

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

    1996-05-31T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

    Liu, Liping

    A continuum theory of thermoelectric bodies and effective properties of thermoelectric composites Science, 2012. Contents 1 Introduction 2 2 A continuum model for thermoelectric bodies 4 2.1 Experimental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.3 A constitutive model for thermoelectric materials . . . . . . . . . . . . . . . . . . . . 6 2

  16. Thermoelectric energy conversion using nanostructured materials

    E-Print Network [OSTI]

    Chen, Gang

    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 ...

  17. Development of Thermoelectric Technology for Automotive Waste...

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

    from 300K to 800K", International Conference of Thermoelectrics (ICT2007) Jeju Island, South Korea, June4-7 2007. 23. H. Wang, "Thermoelectrics Power Generation: A Review of DOE...

  18. 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

  19. Challenges and Opportunities in Thermoelectric Energy Conversion...

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

    Energy Conversion Challenges and Opportunities in Thermoelectric Energy Conversion 2004 Diesel Engine Emissions Reduction (DEER) Conference Presentation: Lawrence Berkeley...

  20. Proactive Strategies for Designing Thermoelectric Materials for...

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

    multiple-rattler skutterudite thermoelectric materials design, synthesis, fabrication, and characterization for power generation using vehicle exhaust waste heat. subramanian...

  1. 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 skutterudite...

  2. Projet TESEER Thermoelectric micro Energy Source

    E-Print Network [OSTI]

    Baudoin, Geneviève

    Projet TESEER Thermoelectric micro Energy Source Enhanced by Electromagnetic Radiation Participants of silicon to be used as a hot-spot for a thermoelectric element. Applications also exists for PV cells) Thermoelectric micro Energy Source Enhanced by Electromagnetic Radiation Objectifs Le projet TESEER consiste

  3. AbstractAbstract Improving efficiency of thermoelectric

    E-Print Network [OSTI]

    Walker, D. Greg

    AbstractAbstract · Improving efficiency of thermoelectric energy conversion devices is a major-classical transport models used to predict ZT can effectively predict thermoelectric performance of bulk materials method proposed to couple quantum and scattering effects to predict thermoelectric performance. · NEGF

  4. Enhanced thermoelectric performance of rough silicon nanowires

    E-Print Network [OSTI]

    Yang, Peidong

    LETTERS Enhanced thermoelectric performance of rough silicon nanowires Allon I. Hochbaum1 *, Renkun, such that roughly 15 terawatts of heat is lost to the environment. Thermoelectric modules could potentially convert part of this low-grade waste heat to electricity. Their efficiency depends on the thermoelectric figure

  5. NEW DIRECTIONS IN RADIOISOTOPE SPECTRUM IDENTIFICATION

    SciTech Connect (OSTI)

    Salaymeh, S.; Jeffcoat, R.

    2010-06-17T23:59:59.000Z

    Recent studies have found the performance of commercial handheld detectors with automatic RIID software to be less than acceptable. Previously, we have explored approaches rooted in speech processing such as cepstral features and information-theoretic measures. Scientific advances are often made when researchers identify mathematical or physical commonalities between different fields and are able to apply mature techniques or algorithms developed in one field to another field which shares some of the same challenges. The authors of this paper have identified similarities between the unsolved problems faced in gamma-spectroscopy for automated radioisotope identification and the challenges of the much larger body of research in speech processing. Our research has led to a probabilistic framework for describing and solving radioisotope identification problems. Many heuristic approaches to classification in current use, including for radioisotope classification, make implicit probabilistic assumptions which are not clear to the users and, if stated explicitly, might not be considered desirable. Our framework leads to a classification approach with demonstrable improvements using standard feature sets on proof-of-concept simulated and field-collected data.

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

    SciTech Connect (OSTI)

    Ferrell, P.C.

    1996-04-18T23:59:59.000Z

    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.

  7. Improved Thermoelectric Devices: Advanced Semiconductor Materials for Thermoelectric Devices

    SciTech Connect (OSTI)

    None

    2009-12-11T23:59:59.000Z

    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.

  8. Thermoelectric refrigerator having improved temperature stabilization means

    DOE Patents [OSTI]

    Falco, Charles M. (Woodridge, IL)

    1982-01-01T23:59:59.000Z

    A control system for thermoelectric refrigerators is disclosed. The thermoelectric refrigerator includes at least one thermoelectric element that undergoes a first order change at a predetermined critical temperature. The element functions as a thermoelectric refrigerator element above the critical temperature, but discontinuously ceases to function as a thermoelectric refrigerator element below the critical temperature. One example of such an arrangement includes thermoelectric refrigerator elements which are superconductors. The transition temperature of one of the superconductor elements is selected as the temperature control point of the refrigerator. When the refrigerator attempts to cool below the point, the metals become superconductors losing their ability to perform as a thermoelectric refrigerator. An extremely accurate, first-order control is realized.

  9. Thermoelectric effect in molecular electronics

    E-Print Network [OSTI]

    M. Paulsson; S. Datta

    2003-01-14T23:59:59.000Z

    We provide a theoretical estimate of the thermoelectric current and voltage over a Phenyldithiol molecule. We also show that the thermoelectric voltage is (1) easy to analyze, (2) insensitive to the detailed coupling to the contacts, (3) large enough to be measured and (4) give valuable information, which is not readily accessible through other experiments, on the location of the Fermi energy relative to the molecular levels. The location of the Fermi-energy is poorly understood and controversial even though it is a central factor in determining the nature of conduction (n- or p-type). We also note that the thermoelectric voltage measured over Guanine molecules with an STM by Poler et al., indicate conduction through the HOMO level, i.e., p-type conduction.

  10. Radioisotopes for Medical Diagnostics and Cancer Therapy at BNL...

    Office of Science (SC) Website

    Excess pulses (90%) are diverted to BLIP for medical radioisotope research and production. Major current projects include large scale distribution of Sr-82 for heart scans,...

  11. Medical Radioisotope Data Survey: 2002 Preliminary Results

    SciTech Connect (OSTI)

    Siciliano, Edward R.

    2004-06-23T23:59:59.000Z

    A limited, but accurate amount of detailed information about the radioactive isotopes used in the U.S. for medical procedures was collected from a local hospital and from a recent report on the U.S. Radiopharmaceutical Markets. These data included the total number of procedures, the specific types of procedures, the specific radioisotopes used in these procedures, and the dosage administered per procedure. The information from these sources was compiled, assessed, pruned, and then merged into a single, comprehensive and consistent set of results presented in this report. (PIET-43471-TM-197)

  12. Improvements to solar thermoelectric generators through device design

    E-Print Network [OSTI]

    Weinstein, Lee A. (Lee Adragon)

    2013-01-01T23:59:59.000Z

    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 ...

  13. Thermoelectric Transport in a ZrN/ScN Superlattice

    E-Print Network [OSTI]

    2009-01-01T23:59:59.000Z

    at Springerlink.com Thermoelectric Transport in a ZrN/ScNthe potential for a high thermoelectric ?gure of merit. Theexperimental studies of the thermoelectric transport in ZrN/

  14. New nano structure approaches for bulk thermoelectric materials

    E-Print Network [OSTI]

    Kim, Jeonghoon

    2010-01-01T23:59:59.000Z

    developments in bulk thermoelectric materials", M. Mater.and M. D. Drsselhaus, "Thermoelectric figure of merit of aO'Quinn, " Thin-film thermoelectric devices with high room-

  15. Thermal Conductivity of Polycrystalline Semiconductors and Ceramics

    E-Print Network [OSTI]

    Wang, Zhaojie

    2012-01-01T23:59:59.000Z

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

  16. Actinium radioisotope products of enhanced purity

    DOE Patents [OSTI]

    Meikrantz, David Herbert; Todd, Terry Allen; Tranter, Troy Joseph; Horwitz, E. Philip

    2010-06-15T23:59:59.000Z

    A product includes actinium-225 (.sup.225Ac) and less than about 1 microgram (.mu.g) of iron (Fe) per millicurie (mCi) of actinium-225. The product may have a radioisotopic purity of greater than about 99.99 atomic percent (at %) actinium-225 and daughter isotopes of actinium-225, and may be formed by a method that includes providing a radioisotope mixture solution comprising at least one of uranium-233 (.sup.233U) and thorium-229 (.sup.229Th), extracting the at least one of uranium-233 and thorium-229 into an organic phase, substantially continuously contacting the organic phase with an aqueous phase, substantially continuously extracting actinium-225 into the aqueous phase, and purifying the actinium-225 from the aqueous phase. In some embodiments, the product may include less than about 1 nanogram (ng) of iron per millicurie (mCi) of actinium-225, and may include less than about 1 microgram (.mu.g) each of magnesium (Mg), Chromium (Cr), and manganese (Mn) per millicurie (mCi) of actinium-225.

  17. 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...

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

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

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

  19. 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...

  20. Multilayer Thin-Film Thermoelectric Materials for Vehicle Applications...

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

    Multilayer Thin-Film Thermoelectric Materials for Vehicle Applications Multilayer Thin-Film Thermoelectric Materials for Vehicle Applications 2004 Diesel Engine Emissions Reduction...

  1. 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...

  2. Modeling study of thermoelectric SiGe nanocomposites

    E-Print Network [OSTI]

    Minnich, Austin Jerome

    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 ...

  3. Modular Low Cost High Energy Exhaust Heat Thermoelectric Generator...

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

    Low Cost High Energy Exhaust Heat Thermoelectric Generator with Closed-Loop Exhaust By-Pass System Modular Low Cost High Energy Exhaust Heat Thermoelectric Generator with...

  4. New nano structure approaches for bulk thermoelectric materials

    E-Print Network [OSTI]

    Kim, Jeonghoon

    2010-01-01T23:59:59.000Z

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

  5. 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 &...

  6. Status of Segmented Element Thermoelectric Generator for Vehicle...

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

    Advanced Thermoelectric Solutions - 4 - Advanced Thermoelectric Solutions - 5 - High and medium temperature TE engines are shown in the photo-right The engines incorporate...

  7. Development of Cost-Competitive Advanced Thermoelectric Generators...

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

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

  8. 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...

  9. 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...

  10. High-Performance Thermoelectric Devices Based on Abundant Silicide...

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

    Development of high-performance thermoelectric devices for vehicle waste heat recovery will include fundamental research to use abundant promising low-cost thermoelectric...

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

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

    ace049schock2011o.pdf More Documents & Publications Thermoelectric Conversion of Waste Heat to Electricity in an IC Engine Powered Vehicle Thermoelectric Conversion of...

  12. 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...

  13. 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...

  14. Status of Segmented Element Thermoelectric Generator for Vehicle...

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

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

  15. 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...

  16. A Thermoelectric Generator with an Intermediate Heat Exchanger...

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

    A Thermoelectric Generator with an Intermediate Heat Exchanger for Automotive Waste Heat Recovery System A Thermoelectric Generator with an Intermediate Heat Exchanger for...

  17. 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...

  18. Low and high Temperature Dual Thermoelectric Generation Waste...

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

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

  19. Overview of Fords Thermoelectric Programs: Waste Heat Recovery...

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

    Fords Thermoelectric Programs: Waste Heat Recovery and Climate Control Overview of Fords Thermoelectric Programs: Waste Heat Recovery and Climate Control Overview of progress...

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

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

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

  1. 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...

  2. Review of Interests and Activities in Thermoelectric Materials...

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

    in thermoelectrics include integrated TE-hand-held burners for battery-replacement, waste-heat recovery on vehicles, heat-powered mobile units, and for thermoelectric cooling...

  3. 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...

  4. 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...

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

    Energy Savers [EERE]

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

  6. 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...

  7. System level modeling of thermoelectric generators for automotive...

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

    level modeling of thermoelectric generators for automotive applications System level modeling of thermoelectric generators for automotive applications Uses a model to predict and...

  8. 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...

  9. 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...

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

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

    & Publications Status of Segmented Element Thermoelectric Generator for Vehicle Waste Heat Recovery Status of Segmented Element Thermoelectric Generator for Vehicle Waste Heat...

  11. High Reliability, High TemperatureThermoelectric Power Generation...

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

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

  12. 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...

  13. QUANTUM WELLS THERMOELECTRIC DEVICES FOR DIESEL ENGINES

    SciTech Connect (OSTI)

    Ghamaty, Saeid

    2000-08-20T23:59:59.000Z

    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.

  14. Nanostructured Thermoelectric Materials and High Efficiency Power...

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

    Nanostructured Thermoelectric Materials and High Efficiency Power Generation Modules Home Author: T. Hogan, A. Downey, J. Short, S. D. Mahanti, H. Schock, E. Case Year: 2007...

  15. 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...

  16. 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....

  17. 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...

  18. 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...

  19. 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...

  20. 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...

  1. 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...

  2. 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...

  3. 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...

  4. 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...

  5. Thermoelectric Power Plant Water Needs and Carbon

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

    Study of the Use of Saline Formations for Combined Thermoelectric Power Plant Water Needs and Carbon Sequestration at a Regional Scale: Phase III Report August 2010 DOE...

  6. Scientists Connect Thermoelectric Materials and Topological Insulators...

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

    that does not occur in normal semiconductors. Thermoelectric materials enable scalable direct conversion of heat to electricity in solid state devices, and have potential for...

  7. Thermoelectric Generator Development for Automotive Waste Heat...

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

    for Automotive Waste Heat Recovery Thermoelectric Generator Development for Automotive Waste Heat Recovery Presentation given at the 16th Directions in Engine-Efficiency and...

  8. Development of Thermoelectric Technology for Automotive Waste...

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

    Overview and status of project to develop thermoelectric generator for automotive waste heat recovery and achieve at least 10% fuel economy improvement. deer08gundlach.pdf More...

  9. Scalable Routes to Efficient Thermoelectric Materials

    E-Print Network [OSTI]

    Feser, Joseph Patrick

    2010-01-01T23:59:59.000Z

    power, and recovering waste heat with thermoelectricexcellent fit for both waste-heat harvesting and high powerpush for thermoelectric waste heat recovery applications.

  10. Vehicular Thermoelectric Applications Session DEER 2009

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

    Thermoelectric Applications Session DEER 2009 John W Fairbanks Department of Energy Vehicle Technologies Washington, D.C. August 5, 2009 Dearborn, Michigan Courtesy of DARPA 1903...

  11. Challenges and Opportunities in Thermoelectric Materials Research...

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

    Materials Research for Automotive Applications Challenges and Opportunities in Thermoelectric Materials Research for Automotive Applications Presentation given at the 2007 Diesel...

  12. Evaluation of Storage for Transportation Equipment, Unfueled Convertors, and Fueled Convertors at the INL for the Radioisotope Power Systems Program

    SciTech Connect (OSTI)

    S. G. Johnson; K. L. Lively

    2010-05-01T23:59:59.000Z

    This report contains an evaluation of the storage conditions required for several key components and/or systems of the Radioisotope Power Systems (RPS) Program at the Idaho National Laboratory (INL). These components/systems (transportation equipment, i.e., type ‘B’ shipping casks and the radioisotope thermo-electric generator transportation systems (RTGTS), the unfueled convertors, i.e., multi-hundred watt (MHW) and general purpose heat source (GPHS) RTGs, and fueled convertors of several types) are currently stored in several facilities at the Materials and Fuels Complex (MFC) site. For various reasons related to competing missions, inherent growth of the RPS mission at the INL and enhanced efficiency, it is necessary to evaluate their current storage situation and recommend the approach that should be pursued going forward for storage of these vital RPS components and systems. The reasons that drive this evaluation include, but are not limited to the following: 1) conflict with other missions at the INL of higher priority, 2) increasing demands from the INL RPS Program that exceed the physical capacity of the current storage areas and 3) the ability to enhance our current capability to care for our equipment, decrease maintenance costs and increase the readiness posture of the systems.

  13. Design and performance of radioisotope space power systems based on OSC multitube AMTEC converter designs

    SciTech Connect (OSTI)

    Schock, A.; Noravian, H.; Or, C. [Orbital Sciences Corp., Germantown, MD (United States)

    1997-12-31T23:59:59.000Z

    This paper extends the analytical procedure described in another paper in these proceedings to analyze a variety of compact and light-weight OSC-designed radioisotope-heated generators. Those generators employed General Purpose Heat Source (GPHS) modules and a converter containing sixteen AMTEC cells of OSC`s revised five-tube design with enhanced cell wall reflectivity described in a companion paper in these proceedings. OSC found that the performance of the generator is primarily a function of the thermal insulation between the outside of the generator`s 16 cells and the inside of its wall. After examining a variety of insulation options, it was found that the generator`s performance is optimized by employing a hybrid insulation system, in which the space between the cells is filled with fibrous Min-K insulation, and the generator walls are lined with tapered (i.e., graded-length) multifoil insulation. The OSC design results in a very compact generator, with eight AMTEC cells on each end of the heat source stack. The choice of the five-tube cells makes it possible to expand the BASE tube diameter without increasing the cell diameter. This is important because the eight cells mate well with the stacked GPHS modules. The OSC generator design includes a compliant heat source support and preload arrangement, to hold the heat source modules together during launch, and to maintain thermal contact conductance at the generator`s interfaces despite creep relaxation of its housing. The BOM and EOM (up to 15 years) performances of the revised generators were analyzed for two and three GPHS modules, both for fresh fuel and for aged fuel left over from a spare RTG (Radioisotope Thermoelectric Generator) fueled in 1982. The resulting power outputs were compared with JPL`s latest EOM power demand goals for the Pluto Express and Europa Orbiter missions, and with the generic goals of DOE`s Advanced Radioisotope Power System (ARPS) study. The OSC AMTEC designs yielded system efficiencies three to four times as high as present-generation RTGs.

  14. A 5 MW TRIGA reactor design for radioisotope production

    SciTech Connect (OSTI)

    Veca, Anthony R.; Whittemore, William L. [General Atomics, San Diego, CA (United States)

    1994-07-01T23:59:59.000Z

    The production and preparation of commercial-scale quantities of radioisotopes has become an important activity as their medical and industrial applications continue to expand. There are currently various large multipurpose research reactors capable of producing ample quantities of radioisotopes. These facilities, however, have many competing demands placed upon them by a wide variety of researchers and scientific programs which severely limit their radioisotope production capability. A demonstrated need has developed for a simpler reactor facility dedicated to the production of radioisotopes on a commercial basis. This smaller, dedicated reactor could provide continuous fission and activation product radioisotopes to meet commercial requirements for the foreseeable future. The design of a 5 MW TRIGA reactor facility, upgradeable to 10 MW, dedicated to the production of industrial and medical radioisotopes is discussed. A TRIGA reactor designed specifically for this purpose with its demonstrated long core life and simplicity of operation would translate into increased radioisotope production. As an example, a single TRIGA could supply the entire US needs for Mo-99. The facility is based on the experience gained by General Atomics in the design, installation, and construction of over 60 other TRIGAs over the past 35 years. The unique uranium-zirconium hydride fuel makes TRIGA reactors inexpensive to build and operate, reliable in their simplicity, highly flexible due to unique passive safety, and environmentally friendly because of minimal power requirements and long-lived fuel. (author)

  15. ANNUAL TECHNICAL PROGRESS REPORT OF RADIOISOTOPE POWER SYSTEM MATERIALS PRODUCTION AND TECHNOLOGY PROGRAM TASKS FOR OCTOBER 1, 2005 THROUGH SEPTEMBER 30, 2006

    SciTech Connect (OSTI)

    King, James F [ORNL

    2007-04-01T23:59:59.000Z

    The Office of Space and Defense Power Systems of the Department of Energy (DOE) provides Radioisotope Power Systems (RPS) for applications where conventional power systems are not feasible. For example, radioisotope thermoelectric generators were supplied by the DOE to the National Aeronautics and Space Administration for deep space missions including the Cassini Mission launched in October of 1997 to study the planet Saturn. For the Cassini Mission, ORNL produced carbon-bonded carbon fiber (CBCF) insulator sets, iridium alloy blanks and foil, and clad vent sets (CVS) used in the generators. The Oak Ridge National Laboratory (ORNL) has been involved in developing materials and technology and producing components for the DOE for more than three decades. This report reflects program guidance from the Office of Space and Defense Power Systems for fiscal year (FY) 2006. Production activities for prime quality (prime) CBCF insulator sets, iridium alloy blanks and foil, and CVS are summarized in this report. Technology activities are also reported that were conducted to improve the manufacturing processes, characterize materials, or to develop information for new radioisotope power systems.

  16. ANNUAL TECHNICAL PROGRESS REPORT OF RADIOISOTOPE POWER SYSTEMS MATERIALS PRODUCTION AND TECHNOLOGY PROGRAM TASKS FOR OCTOBER 1, 2010 THROUGH SEPTEMBER 30, 2011

    SciTech Connect (OSTI)

    King, James F [ORNL

    2012-05-01T23:59:59.000Z

    The Office of Space and Defense Power Systems of the Department of Energy (DOE) provides Radioisotope Power Systems (RPS) for applications where conventional power systems are not feasible. For example, radioisotope thermoelectric generators were supplied by the DOE to the National Aeronautics and Space Administration (NASA) for deep space missions including the Cassini Mission launched in October of 1997 to study the planet Saturn. For the Cassini Mission, the Oak Ridge National Laboratory (ORNL) produced carbon-bonded carbon fiber (CBCF) insulator sets, iridium alloy blanks and foil, and clad vent sets (CVS) used in the generators. These components were also produced for the Pluto New Horizons and Mars Science Lab missions launched in January 2006 and November 2011respectively. The ORNL has been involved in developing materials and technology and producing components for the DOE for nearly four decades. This report reflects program guidance from the Office of RPS for fiscal year (FY) 2011. Production activities for prime quality (prime) CBCF insulator sets, iridium alloy blanks and foil, and CVS are summarized in this report. Technology activities are also reported that were conducted to improve the manufacturing processes, characterize materials, or to develop information for new RPS. Work has also been initiated to establish fabrication capabilities for the Light Weight Radioisotope Heater Units.

  17. Annual Technical Progress Report of Radioisotope Power System Materials Production and Technical Program Tasks for October 1, 2005 through September 30, 2006

    SciTech Connect (OSTI)

    None

    2007-04-02T23:59:59.000Z

    The Office of Space and Defense Power Systems of the Department of Energy (DOE) provides Radioisotope Power Systems (RPS) for applications where conventional power systems are not feasible. For example, radioisotope thermoelectric generators were supplied by the DOE to the National Aeronautics and Space Administration for deep space missions including the Cassini Mission launched in October of 1997 to study the planet Saturn. For the Cassini Mission, ORNL produced carbon-bonded carbon fiber (CBCF) insulator sets, iridium alloy blanks and foil, and clad vent sets (CVS) used in the generators. The Oak Ridge National Laboratory (ORNL) has been involved in developing materials and technology and producing components for the DOE for more than three decades. This report reflects program guidance from the Office of Space and Defense Power Systems for fiscal year (FY) 2006. Production activities for prime quality (prime) CBCF insulator sets, iridium alloy blanks and foil, and CVS are summarized in this report. Technology activities are also reported that were conducted to improve the manufacturing processes, characterize materials, or to develop information for new radioisotope power systems.

  18. Annual Technical Progress Report of Radioisotope Power System Materials Production and Technology Program Tasks for October 1, 2004 Through September 30, 2005

    SciTech Connect (OSTI)

    King, James F [ORNL

    2006-06-01T23:59:59.000Z

    The Office of Space and Defense Power Systems of the Department of Energy (DOE) provides Radioisotope Power Systems (RPS) for applications where conventional power systems are not feasible. For example, radioisotope thermoelectric generators were supplied by the DOE to the National Aeronautics and Space Administration for deep space missions including the Cassini Mission launched in October of 1997 to study the planet Saturn. For the Cassini Mission, ORNL produced carbon-bonded carbon fiber (CBCF) insulator sets, iridium alloy blanks and foil, and clad vent sets (CVS) used in the generators. The Oak Ridge National Laboratory (ORNL) has been involved in developing materials and technology and producing components for the DOE for more than three decades. This report reflects program guidance from the Office of Space and Defense Power Systems for fiscal year (FY) 2005. Production activities for prime quality (prime) CBCF insulator sets, iridium alloy blanks and foil, and CVS are summarized in this report. Technology activities are also reported that were conducted to improve the manufacturing processes, characterize materials, or to develop information for new radioisotope power systems.

  19. Annual Technical Progress Report of Radioisotope Power System Materials Production and Technology Tasks for October 1, 2003 through September 30, 2004

    SciTech Connect (OSTI)

    None listed

    2005-06-01T23:59:59.000Z

    The Office of Space and Defense Power Systems of the Department of Energy (DOE) provides Radioisotope Power Systems (RPS) for applications where conventional power systems are not feasible. For example, radioisotope thermoelectric generators were supplied by the DOE to the National Aeronautics and Space Administration for deep space missions including the Cassini Mission launched in October of 1997 to study the planet Saturn. For the Cassini Mission, ORNL produced carbon-bonded carbon fiber (CBCF) insulator sets, iridium alloy blanks and foil, and clad vent sets (CVS) used in the generators. The Oak Ridge National Laboratory (ORNL) has been involved in developing materials and technology and producing components for the DOE for more than three decades. This report reflects program guidance from the Office of Space and Defense Power Systems for fiscal year (FY) 2004. Production and production maintenance activities for flight quality (FQ) CBCF insulator sets, iridium alloy blanks and foil, and CVS are summarized in this report. In all three cases, production maintenance is assured by the manufacture of limited quantities of FQ components. Technology activities are also reported that were conducted to improve the manufacturing processes, characterize materials, or to develop information for new radioisotope power systems.

  20. Annual Technical Progress Report of Radioisotope Power System Materials Production and Technology Tasks for October 1, 2004 through September 30, 2005

    SciTech Connect (OSTI)

    None listed

    2006-08-03T23:59:59.000Z

    The Office of Space and Defense Power Systems of the Department of Energy (DOE) provides Radioisotope Power Systems (RPS) for applications where conventional power systems are not feasible. For example, radioisotope thermoelectric generators were supplied by the DOE to the National Aeronautics and Space Administration for deep space missions including the Cassini Mission launched in October of 1997 to study the planet Saturn. For the Cassini Mission, ORNL produced carbon-bonded carbon fiber (CBCF) insulator sets, iridium alloy blanks and foil, and clad vent sets (CVS) used in the generators. The Oak Ridge National Laboratory (ORNL) has been involved in developing materials and technology and producing components for the DOE for more than three decades. This report reflects program guidance from the Office of Space and Defense Power Systems for fiscal year (FY) 2005. Production activities for prime quality (prime) CBCF insulator sets, iridium alloy blanks and foil, and CVS are summarized in this report. Technology activities are also reported that were conducted to improve the manufacturing processes, characterize materials, or to develop information for new radioisotope power systems.

  1. Thermoelectric and electrical characterization of Si nanowires and GaNAs

    E-Print Network [OSTI]

    Pichanusakorn, Paothep

    2012-01-01T23:59:59.000Z

    1 Introduction to Thermoelectric phenomena and theory . . .1.1 Thermoelectric139 5.1.1 Thermoelectric application for highly-mismatch

  2. High-Temperature Thermoelectric Characterization of III–V Semiconductor Thin Films by Oxide Bonding

    E-Print Network [OSTI]

    2010-01-01T23:59:59.000Z

    High-Temperature Thermoelectric Characterization of III–Vfor high-temperature thermoelectric charac- terization ofdiffusion barrier. A thermoelectric material, thin-?lm ErAs:

  3. Increasing the thermoelectric figure of merit of tetrahedrites by Co-doping with nickel and zinc

    E-Print Network [OSTI]

    Lu, X; Morelli, DT; Morelli, DT; Xia, Y; Ozolins, V

    2015-01-01T23:59:59.000Z

    Increasing  the  Thermoelectric  Figure  of  Merit  of  increase   in   the   thermoelectric   figure   of   merit  coefficient  and  thermoelectric  power  factor;  and  2)  

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

    SciTech Connect (OSTI)

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

    1997-07-01T23:59:59.000Z

    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.

  5. CONFERENCE PROCEEDINGS Low-dimensional thermoelectric materials

    E-Print Network [OSTI]

    Cronin, Steve

    be used in practical devices for cooling and for electrical power generation.1 This early work led as a thermoelectric material was discovered by H. J. Goldsmid and coworkers in the U.K.,2 and this material system- tivity in the field of thermoelectricity has been greatly re- duced, and only modest progress was made

  6. Nanostructures having high performance thermoelectric properties

    SciTech Connect (OSTI)

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

    2014-05-20T23:59:59.000Z

    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.

  7. Radioisotope Power Sources for MEMS Devices,

    SciTech Connect (OSTI)

    Blanchard, J.P.

    2001-06-17T23:59:59.000Z

    Microelectromechanical systems (MEMS) comprise a rapidly expanding research field with potential applications varying from sensors in airbags to more recent optical applications. Depending on the application, these devices often require an on-board power source for remote operation, especially in cases requiring operation for an extended period of time. Previously suggested power sources include fossil fuels and solar energy, but nuclear power sources may provide significant advantages for certain applications. Hence, the objective of this study is to establish the viability of using radioisotopes to power realistic MEMS devices. A junction-type battery was constructed using silicon and a {sup 63}Ni liquid source. A source volume containing 64 {micro}Ci provided a power of {approx}0.07 nW. A more novel application of nuclear sources for MEMS applications involves the creation of a resonator that is driven by charge collection in a cantilever beam. Preliminary results have established the feasibility of this concept, and future work will optimize the design for various applications.

  8. Thermoelectric materials development. Final report

    SciTech Connect (OSTI)

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

    1998-09-01T23:59:59.000Z

    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.

  9. Catalytic converter with thermoelectric generator

    SciTech Connect (OSTI)

    Parise, R.J.

    1998-07-01T23:59:59.000Z

    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.

  10. Thermoelectric generator cooling system and method of control

    DOE Patents [OSTI]

    Prior, Gregory P; Meisner, Gregory P; Glassford, Daniel B

    2012-10-16T23:59:59.000Z

    An apparatus is provided that includes a thermoelectric generator and an exhaust gas system operatively connected to the thermoelectric generator to heat a portion of the thermoelectric generator with exhaust gas flow through the thermoelectric generator. A coolant system is operatively connected to the thermoelectric generator to cool another portion of the thermoelectric generator with coolant flow through the thermoelectric generator. At least one valve is controllable to cause the coolant flow through the thermoelectric generator in a direction that opposes a direction of the exhaust gas flow under a first set of operating conditions and to cause the coolant flow through the thermoelectric generator in the direction of exhaust gas flow under a second set of operating conditions.

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

    SciTech Connect (OSTI)

    None

    2010-03-01T23:59:59.000Z

    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.

  12. Increasing thermoelectric efficiency towards the Carnot limit

    E-Print Network [OSTI]

    Giulio Casati; Carlos Mejia-Monasterio; Tomaz Prosen

    2008-02-27T23:59:59.000Z

    We study the problem of thermoelectricity and propose a simple microscopic mechanism for the increase of thermoelectric efficiency. We consider the cross transport of particles and energy in open classical ergodic billiards. We show that, in the linear response regime, where we find exact expressions for all transport coefficients, the thermoelectric efficiency of ideal ergodic gases can approach Carnot efficiency for sufficiently complex charge carrier molecules. Our results are clearly demonstrated with a simple numerical simulation of a Lorentz gas of particles with internal rotational degrees of freedom.

  13. Bulk dimensional nanocomposites for thermoelectric applications

    DOE Patents [OSTI]

    Nolas, George S

    2014-06-24T23:59:59.000Z

    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.

  14. In-line thermoelectric module

    DOE Patents [OSTI]

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

    2000-01-01T23:59:59.000Z

    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.

  15. Photoacoustic measurement of bandgaps of thermoelectric materials

    E-Print Network [OSTI]

    Ni, George (George Wei)

    2014-01-01T23:59:59.000Z

    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 ...

  16. Device testing and characterization of thermoelectric nanocomposites

    E-Print Network [OSTI]

    Muto, Andrew (Andrew Jerome)

    2008-01-01T23:59:59.000Z

    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 ...

  17. Heat Transfer in Thermoelectric Materials and Devices

    E-Print Network [OSTI]

    Tian, Zhiting

    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 ...

  18. Theoretical efficiency of solar thermoelectric energy generators

    E-Print Network [OSTI]

    Chen, Gang

    This paper investigates the theoretical efficiency of solar thermoelectric generators (STEGs). A model is established including thermal concentration in addition to optical concentration. Based on the model, the maximum ...

  19. Generalized drift-diffusion for microscopic thermoelectricity

    E-Print Network [OSTI]

    Santhanam, Parthiban

    2009-01-01T23:59:59.000Z

    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 ...

  20. Modeling of concentrating solar thermoelectric generators

    E-Print Network [OSTI]

    Ren, Zhifeng

    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 ...

  1. Probing thermoelectric transport with cold atoms

    E-Print Network [OSTI]

    Charles Grenier; Corinna Kollath; Antoine Georges

    2013-11-10T23:59:59.000Z

    We propose experimental protocols to reveal thermoelectric and thermal effects in the transport properties of ultracold fermionic atoms, using the two-terminal setup recently realized at ETH. We show in particular that, for two reservoirs having equal particle numbers but different temperatures initially, the observation of a transient particle number imbalance during equilibration is a direct evidence of thermoelectric (off-diagonal) transport coefficients. This is a time-dependent analogue of the Seebeck effect, and a corresponding analogue of the Peltier effect can be proposed. We reveal that in addition to the thermoelectric coupling of the constriction a thermoelectric coupling also arises due to the finite dilatation coefficient of the reservoirs. We present a theoretical analysis of the protocols, and assess their feasibility by estimating the corresponding temperature and particle number imbalances in realistic current experimental conditions.

  2. Thermoelectrics : material advancements and market applications

    E-Print Network [OSTI]

    Monreal, Jorge

    2007-01-01T23:59:59.000Z

    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 ...

  3. Modeling water use at thermoelectric power plants

    E-Print Network [OSTI]

    Rutberg, Michael J. (Michael Jacob)

    2012-01-01T23:59:59.000Z

    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 ...

  4. Solar thermoelectrics for small scale power generation

    E-Print Network [OSTI]

    Amatya, Reja

    2012-01-01T23:59:59.000Z

    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 ...

  5. High Temperature Integrated Thermoelectric Ststem and Materials

    SciTech Connect (OSTI)

    Mike S. H. Chu

    2011-06-06T23:59:59.000Z

    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.

  6. Proposal for a phase-coherent thermoelectric transistor

    E-Print Network [OSTI]

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

    2014-01-01T23:59:59.000Z

    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...

  7. Thermoelectric Behavior of Flexible Organic Nanocomposites with Carbon Nanotubes 

    E-Print Network [OSTI]

    Choi, Kyung Who

    2013-12-03T23:59:59.000Z

    There have been significant researches about thermoelectric behaviors by applying carbon nanotube (CNT)/polymer nanocomposites. Due to its thermally disconnected but electrically connected junctions between CNTs, the thermoelectric properties were...

  8. Synthesis and physical characterization of thermoelectric single crystals

    E-Print Network [OSTI]

    Porras Pérez Guerrero, Juan Pablo

    2012-01-01T23:59:59.000Z

    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] ...

  9. Segregated Network Polymer-Carbon Nanotubes Composites For Thermoelectrics

    E-Print Network [OSTI]

    Kim, Dasaroyong

    2010-10-12T23:59:59.000Z

    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....

  10. 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 :...

  11. Modeling of solar thermal selective surfaces and thermoelectric generators

    E-Print Network [OSTI]

    McEnaney, Kenneth

    2010-01-01T23:59:59.000Z

    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 ...

  12. 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...

  13. Enhancing the Thermoelectric Power Factor with Highly Mismatched Isoelectronic Doping

    E-Print Network [OSTI]

    Grossman, Jeffrey C.

    We investigate the effect of O impurities on the thermoelectric properties of ZnSe from a combination

  14. 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

  15. Thermoelectric Research Takes Spotlight Improvements in Efficiency Help Fuel Results

    E-Print Network [OSTI]

    Thermoelectric Research Takes Spotlight Improvements in Efficiency Help Fuel Results m i c h i g of alternative energy sources, thermoelectrics may not immediately come to mind, but MSU and the College interest in alternative energy sources certainly has helped to bring thermoelectrics into the limelight

  16. Engineering Enhanced Thermoelectric Properties in Zigzag Graphene Nanoribbons

    E-Print Network [OSTI]

    Engineering 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 nanoribbon structure that exhibits very poor thermoelectric performance, we demonstrate how after a series

  17. Optimizing Thermoelectric Power Factor by Means of a Potential Barrier

    E-Print Network [OSTI]

    1 Optimizing Thermoelectric Power Factor by Means of a Potential Barrier Neophytos Neophytou}@iue.tuwien.ac.at Abstract Large efforts in improving thermoelectric energy conversion are devoted to energy filtering design, ~40% improvement in the thermoelectric power factor can be achieved if the following conditions

  18. Critical Behavior of the Thermoelectric Transport Properties in Amorphous Systems

    E-Print Network [OSTI]

    Chemnitz, Technische Universität

    Critical Behavior of the Thermoelectric Transport Properties in Amorphous Systems near the Metal., London SW7 2BZ, U.K. Abstract The scaling behavior of the thermoelectric trans- port properties;, the thermoelectric power S, the thermal conductivity K and the Lorenz number L0 obey scaling. The scaling description

  19. Profiling the Thermoelectric Power of Semiconductor Junctions with

    E-Print Network [OSTI]

    Profiling the Thermoelectric Power of Semiconductor Junctions with Nanometer Resolution Ho-Ki Lyeo,3 * We have probed the local thermoelectric power of semiconductor nanostruc- tures with the use of ultrahigh-vacuum scanning thermoelectric microscopy. When applied to a p-n junction, this method reveals

  20. Photo-Thermoelectric Effect at a Graphene Interface Junction

    E-Print Network [OSTI]

    McEuen, Paul L.

    Photo-Thermoelectric Effect at a Graphene Interface Junction Xiaodong Xu, Nathaniel M. Gabor increase at the cryogenic temperature as compared to room temperature. Assuming the thermoelectric power predictions. KEYWORDS Graphene, photocurrent, photo-thermoelectric effect D evices that convert photons

  1. Thermoelectric Properties of Superlattice Materials with Variably Spaced Layers

    E-Print Network [OSTI]

    Walker, D. Greg

    Thermoelectric Properties of Superlattice Materials with Variably Spaced Layers T.D. Musho of electronic level alignment. We have investigated the thermoelectric proper- ties of VSSL structures using leads to enhancement of thermoelectric properties. This presumption is based on electrical studies

  2. Project: Driver and controller for a thermoelectric cooler

    E-Print Network [OSTI]

    Project: Driver and controller for a thermoelectric cooler Supervisor: Prof. Sam Ben-Yaakov Year solutions. Based on one of the three thermoelectric phenomena ­ the Peltier effect ­ bi-directional control is achieved. The TEC (which is a Thermoelectric Cooler) uses this effect. The direction of the current through

  3. Thermoelectric power factor in semiconductors with buried epitaxial semimetallic nanoparticles

    E-Print Network [OSTI]

    Bowers, John

    Thermoelectric power factor in semiconductors with buried epitaxial semimetallic nanoparticles J. M, mobility, and Seebeck coefficient of these materials and discuss their potential for use in thermoelectric on thermoelectric materials has focused on the ability of heterostructures and quantum con- finement to increase

  4. Nanostructured Thermoelectric Materials: From Superlattices to Nanocomposites Ronggui Yang1

    E-Print Network [OSTI]

    Chen, Gang

    Nanostructured Thermoelectric Materials: From Superlattices to Nanocomposites Ronggui Yang1 conductivity led to a large increase in the thermoelectric figure of merit in several superlattice systems. Materials with a large thermoelectric figure of merit can be used to develop efficient solid-state devices

  5. Thermoelectric Power Generation Allison Duh and Joel Dungan

    E-Print Network [OSTI]

    Lavaei, Javad

    Thermoelectric Power Generation Allison Duh and Joel Dungan May 15, 2013 #12;Introduction A thermoelectric generator (TEG) is a device that converts heat energy directly into electrical energy. Thermoelectric systems capitalize on semiconductor charge carriers excited by a temperature difference to convert

  6. Subsurface Ambient Thermoelectric Power for Moles and Penetrators1

    E-Print Network [OSTI]

    Lorenz, Ralph D.

    1 Subsurface Ambient Thermoelectric Power for Moles and Penetrators1 Ralph D. Lorenz, Lunar for electrical power generation for planetary exploration applications using thermoelectric conversion of the vehicle. Proof-of-concept experiments are described using off-the-shelf thermoelectric CPU cooling plates

  7. Annual Technical Progress Report of Radioisotope Power Systems Materials Production and Technology Program Tasks for October 1, 2007 Through September 30,2008

    SciTech Connect (OSTI)

    King, James F [ORNL

    2009-04-01T23:59:59.000Z

    The Office of Radioisotope Power Systems (RPS) of the Department of Energy (DOE) provides RPS for applications where conventional power systems are not feasible. For example, radioisotope thermoelectric generators were supplied by the DOE to the National Aeronautics and Space Administration (NASA) for deep space missions including the Cassini Mission launched in October of 1997 to study the planet Saturn. For the Cassini Mission, ORNL produced carbon-bonded carbon fiber (CBCF) insulator sets, iridium alloy blanks and foil, and clad vent sets (CVS) used in the generators. The Oak Ridge National Laboratory (ORNL) has been involved in developing materials and technology and producing components for the DOE for more than three decades. This report reflects program guidance from the Office of RPS for fiscal year (FY) 2008. Production activities for prime quality (prime) CBCF insulator sets, iridium alloy blanks and foil, and CVS are summarized in this report. Technology activities are also reported that were conducted to improve the manufacturing processes, characterize materials, or to develop information for new RPS.

  8. Future Supply of Medical Radioisotopes for the UK Report 2014

    E-Print Network [OSTI]

    Neilly, Brian; Ballinger, Jim; Buscombe, John; Clarke, Rob; Ellis, Beverley; Flux, Glenn; Fraser, Louise; Hall, Adrian; Owen, Hywel; Paterson, Audrey; Perkins, Alan; Scarsbrook, Andrew

    2015-01-01T23:59:59.000Z

    The UK has no research nuclear reactors and relies on the importation of 99Mo and other medical radioisotopes (e.g. Iodine-131) from overseas (excluding PET radioisotopes). The UK is therefore vulnerable not only to global shortages, but to problems with shipping and importation of the products. In this context Professor Erika Denton UK national Clinical Director for Diagnostics requested that the British Nuclear Medicine Society lead a working group with stakeholders including representatives from the Science & Technology Facilities Council (STFC) to prepare a report. The group had a first meeting on 10 April 2013 followed by a working group meeting with presentations on 9th September 2013 where the scope of the work required to produce a report was agreed. The objectives of the report are: to describe the status of the use of medical radioisotopes in the UK; to anticipate the potential impact of shortages for the UK; to assess potential alternative avenues of medical radioisotope production for the UK m...

  9. Production capabilities in US nuclear reactors for medical radioisotopes

    SciTech Connect (OSTI)

    Mirzadeh, S.; Callahan, A.P.; Knapp, F.F. Jr. [Oak Ridge National Lab., TN (United States); Schenter, R.E. [Westinghouse Hanford Co., Richland, WA (United States)

    1992-11-01T23:59:59.000Z

    The availability of reactor-produced radioisotopes in the United States for use in medical research and nuclear medicine has traditionally depended on facilities which are an integral part of the US national laboratories and a few reactors at universities. One exception is the reactor in Sterling Forest, New York, originally operated as part of the Cintichem (Union Carbide) system, which is currently in the process of permanent shutdown. Since there are no industry-run reactors in the US, the national laboratories and universities thus play a critical role in providing reactor-produced radioisotopes for medical research and clinical use. The goal of this survey is to provide a comprehensive summary of these production capabilities. With the temporary shutdown of the Oak Ridge National Laboratory (ORNL) High Flux Isotope Reactor (HFIR) in November 1986, the radioisotopes required for DOE-supported radionuclide generators were made available at the Brookhaven National Laboratory (BNL) High Flux Beam Reactor (HFBR). In March 1988, however, the HFBR was temporarily shut down which forced investigators to look at other reactors for production of the radioisotopes. During this period the Missouri University Research Reactor (MURR) played an important role in providing these services. The HFIR resumed routine operation in July 1990 at 85 MW power, and the HFBR resumed operation in June 1991, at 30 MW power. At the time of the HFBR shutdown, there was no available comprehensive overview which could provide information on status of the reactors operating in the US and their capabilities for radioisotope production. The obvious need for a useful overview was thus the impetus for preparing this survey, which would provide an up-to-date summary of those reactors available in the US at both the DOE-funded national laboratories and at US universities where service irradiations are currently or expected to be conducted.

  10. Determination of Thermoelectric Module Efficiency A Survey

    SciTech Connect (OSTI)

    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

    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.

  11. MoS2 Nanoribbons Thermoelectric Generators

    E-Print Network [OSTI]

    Arab, Abbas

    2015-01-01T23:59:59.000Z

    In this work, we have designed and simulated new thermoelectric generator based on monolayer and few-layer MoS2 nanoribbons. The proposed thermoelectric generator is composed of thermocouples made of both n-type and p-type MoS2 nanoribbon legs. Density Functional Tight-Binding Non-Equilibrium Green's Function (DFTB-NEGF) method has been used to calculate the transmission spectrum of MoS2 armchair and zigzag nanoribbons. Phonon transmission spectrum are calculated based on parameterization of Stillinger-Weber potential. Thermoelectric figure of merit, ZT, is calculated using these electronic and phonon transmission spectrum. Monolayer and bilayer MoS2 armchair nanoribbons are found to have the highest ZT value for p-type and n-type legs, repectively. Moreover, we have compared the thermoelectric current of doped monolayer MoS2 armchair nanoribbons and SZi thin films. Results indicate that thermoelectric current of MoS2 monolayer nanoribbons is several orders of magnitude higher than that of Si thin films.

  12. Microstructure and mechanical properties of thermoelectric nanostructured n-type silicon-germanium alloys synthesized employing spark plasma sintering

    SciTech Connect (OSTI)

    Bathula, Sivaiah [CSIR-Network of Institutes for Solar Energy, CSIR-National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi 110012 (India); Department of Applied Physics, Delhi Technological University, Delhi (India); Gahtori, Bhasker; Tripathy, S. K.; Tyagi, Kriti; Srivastava, A. K.; Dhar, Ajay, E-mail: adhar@nplindia.org [CSIR-Network of Institutes for Solar Energy, CSIR-National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi 110012 (India); Jayasimhadri, M. [Department of Applied Physics, Delhi Technological University, Delhi (India)

    2014-08-11T23:59:59.000Z

    Owing to their high thermoelectric (TE) figure-of-merit, nanostructured Si{sub 80}Ge{sub 20} alloys are evolving as a potential replacement for their bulk counterparts in designing efficient radio-isotope TE generators. However, as the mechanical properties of these alloys are equally important in order to avoid in-service catastrophic failure of their TE modules, we report the strength, hardness, fracture toughness, and thermal shock resistance of nanostructured n-type Si{sub 80}Ge{sub 20} alloys synthesized employing spark plasma sintering of mechanically alloyed nanopowders of its constituent elements. These mechanical properties show a significant enhancement, which has been correlated with the microstructural features at nano-scale, delineated by transmission electron microscopy.

  13. Measurement and characterization techniques for thermoelectric materials

    SciTech Connect (OSTI)

    Tritt, T.M.

    1997-07-01T23:59:59.000Z

    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.

  14. Method of operating a thermoelectric generator

    DOE Patents [OSTI]

    Reynolds, Michael G; Cowgill, Joshua D

    2013-11-05T23:59:59.000Z

    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.

  15. Thermoelectric power generator with intermediate loop

    DOE Patents [OSTI]

    Bell, Lon E; Crane, Douglas Todd

    2013-05-21T23:59:59.000Z

    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.

  16. Thermoelectric power generator with intermediate loop

    DOE Patents [OSTI]

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

    2009-10-27T23:59:59.000Z

    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.

  17. Transport in Charged Colloids Driven by Thermoelectricity

    E-Print Network [OSTI]

    Alois Würger

    2014-01-29T23:59:59.000Z

    We study the thermal diffusion coefficient DT of a charged colloid in a temperature gradient, and find that it is to a large extent determined by the thermoelectric response of the electrolyte solution. The thermally induced salinity gradient leads in general to a strong increase with temperature. The difference of the heat of transport of coions and counterions gives rise to a thermoelectric field that drives the colloid to the cold or to the warm, depending on the sign of its charge. Our results provide an explanation for recent experimental findings on thermophoresis in colloidal suspensions.

  18. Alkaline earth filled nickel skutterudite antimonide thermoelectrics

    DOE Patents [OSTI]

    Singh, David Joseph

    2013-07-16T23:59:59.000Z

    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.

  19. Holey Silicon as an Efficient Thermoelectric Material

    SciTech Connect (OSTI)

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

    2010-09-30T23:59:59.000Z

    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.

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

    SciTech Connect (OSTI)

    Satoh, J.A.

    1995-05-25T23:59:59.000Z

    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.

  1. 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

  2. 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)

    Schock, A.

    1983-04-29T23:59:59.000Z

    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.

  3. Thermoelectric Properties of Some Cobalt Phosphide-Arsenide Compounds Anucha Watcharapasorn*

    E-Print Network [OSTI]

    Thermoelectric Properties of Some Cobalt Phosphide-Arsenide Compounds Anucha Watcharapasorn been synthesized and their thermoelectric properties measured. All three samples show semiconductingAsx system have also been synthesized and their thermoelectric properties are currently being investigated

  4. On the role of material property gradients in noncontacting thermoelectric NDE

    E-Print Network [OSTI]

    Nagy, Peter B.

    On the role of material property gradients in noncontacting thermoelectric NDE Hector Carreon that sense the thermoelectric currents produced by directional heating and cooling of the specimen and tangential magnetic fields produced by the resulting thermoelectric currents. Experimental results from

  5. Highly Ordered Vertical Silicon Nanowire Array Composite Thin Films for Thermoelectric Devices

    E-Print Network [OSTI]

    Bowers, John

    Highly Ordered Vertical Silicon Nanowire Array Composite Thin Films for Thermoelectric Devices for thermoelectric devices are presented. Inter- ference lithography was used to pattern square lattice photoresist device. Key words: Silicon nanowires, thermoelectrics, cross-plane measurements, nanowire composite

  6. Thermoelectric transport perpendicular to thin-film heterostructures calculated using the Monte Carlo technique

    E-Print Network [OSTI]

    Thermoelectric transport perpendicular to thin-film heterostructures calculated using the Monte The Monte Carlo technique is used to calculate electrical as well as thermoelectric transport properties ballistic thermionic transport and fully diffusive thermoelectric transport is also described. DOI: 10

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

    E-Print Network [OSTI]

    Xu, Xianfan

    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

  8. Plastic Gamma Sensors: An Application in Detection of Radioisotopes

    SciTech Connect (OSTI)

    S. Mukhopadhyay

    2003-06-01T23:59:59.000Z

    A brief survey of plastic scintillators for various radiation measurement applications is presented here. The utility of plastic scintillators for practical applications such as gamma radiation monitoring, real-time radioisotope detection and screening is evaluated in laboratory and field measurements. This study also reports results of Monte Carlo-type predictive responses of common plastic scintillators in gamma and neutron radiation fields. Small-size plastic detectors are evaluated for static and dynamic gamma-ray detection sensitivity of selected radiation sources.

  9. Titanium nitride electrodes for thermoelectric generators

    DOE Patents [OSTI]

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

    1987-12-22T23:59:59.000Z

    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.

  10. Molybdenum oxide electrodes for thermoelectric generators

    DOE Patents [OSTI]

    Schmatz, Duane J. (Dearborn Heights, MI)

    1989-01-01T23:59:59.000Z

    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.

  11. Thermoelectric devices and applications for the same

    DOE Patents [OSTI]

    DeSteese, John G [Kennewick, WA; Olsen, Larry C [Richland, WA; Martin, Peter M [Kennewick, WA

    2010-12-14T23:59:59.000Z

    High performance thin film thermoelectric couples and methods of making the same are disclosed. Such couples allow fabrication of at least microwatt to watt-level power supply devices operating at voltages greater than one volt even when activated by only small temperature differences.

  12. Thermoelectric cooling container for medical applications

    SciTech Connect (OSTI)

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

    1997-07-01T23:59:59.000Z

    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.

  13. Design concepts for improved thermoelectric materials

    SciTech Connect (OSTI)

    Slack, G.A.

    1997-07-01T23:59:59.000Z

    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.

  14. Measurements and Standards for Thermoelectric Materials

    E-Print Network [OSTI]

    the development of these materials for applications involving waste heat recovery and solid-state cooling. Our for vehicular waste heat recovery would lead to a 10% improvement in fuel efficiency, translating to a fuel heat recovery and solid-state cooling applications. · The widespread use of thermoelectric converters

  15. 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...

  16. Commercialization of Bulk Thermoelectric Materials for Power Generation

    Broader source: Energy.gov [DOE]

    Critical aspects of technology commercialization of preproduction high performance thermoelectric materials available for device developers, data analysis, and future plans are discussed

  17. DOE/NSF Thermoelectric Partnership Project SEEBECK Saving Energy...

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

    Research and Sharing Knowledge DOENSF Thermoelectric Partnership Project SEEBECK Saving Energy Effectively By Engaging in Collaborative Research and Sharing Knowledge 2012 DOE...

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

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

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

  19. DOE/NSF Thermoelectric Partnership Project SEEBECK Saving Energy...

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

    research and sharing Knowledge DOENSF Thermoelectric Partnership Project SEEBECK Saving Energy Effectively By Engaging in Collaborative research and sharing Knowledge 2011 DOE...

  20. Characterization of thermoelectric elements and devices by impedance...

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

    Characterization of thermoelectric elements and devices by impedance spectroscopy Home Author: A. D. Downey, T. P. Hogan, B. Cook Year: 2007 Abstract: This article describes a new...

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

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

    for Hybrid Vehicles Establishing Thermo-Electric Generator (TEG) Design Targets for Hybrid Vehicles 2013 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program...

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

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

    Establishing Thermo-Electric Generator (TEG) Design Targets for Hybrid Vehicles 2013 DOE Hydrogen Program and Vehicle Technologies Annual Merit Review May 15th, 2013 R.Vijayagopal,...

  3. Sandia Energy - Sandia Researchers Are First to Measure Thermoelectric...

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

    and have no moving parts, making them extremely attractive for cooling and energy harvesting applications. Thermoelectric metal-organic frameworks (MOFs) could take these...

  4. Nanostructured High-Temperature Bulk Thermoelectric Energy Conversion...

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

    Nanostructured High-Temperature Bulk Thermoelectric Energy Conversion for Efficient Automotive Waste Heat Recovery Vehicle Technologies Office Merit Review 2014: Nanostructured...

  5. Overview of Thermoelectric Power Generation Technologies in Japan...

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

    in Japan Discusses thermoelectric power generation technologies as applied to waste heat recovery, renewable thermal energy sources, and energy harvesting kajikawa.pdf...

  6. 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...

  7. Develop Thermoelectric Technology for Automotive Waste Heat Recovery...

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

    Develop thermoelectric technology for waste heat recovery with a 10% fuel economy improvement without increasing emissions. deer09yang2.pdf More Documents & Publications...

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

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

    Maryland. merit08schock.pdf More Documents & Publications Thermoelectric Conversion of Waste Heat to Electricity in an IC Engine Powered Vehicle Efficiency Improvement in an...

  9. Measurement of Thermoelectric Properties of a Single Nanowire...

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

    Add to Calendar SHARE With growing worldwide demand for energy harvesting, capturing waste heat with thermoelectric coolers and generators has driven the development of high...

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

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

    Exhaust Gas Waste Heat into Usable Electricity Thermoelectric Conversion of Exhaust Gas Waste Heat into Usable Electricity Presents successful incorporation of one of the most...

  11. 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...

  12. New nano structure approaches for bulk thermoelectric materials

    E-Print Network [OSTI]

    Kim, Jeonghoon

    2010-01-01T23:59:59.000Z

    Thermoelectrics: Direct Solar Thermal Energy Conversion”,are working on solar thermal energy to generate electriccooling for CPUs, solar thermal energy harvesting, solid-

  13. 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...

  14. Automotive Thermoelectric Moduleswith Scalable Thermo- andElectro...

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

    Moduleswith Scalable Thermo- and Electro-Mechanical Interfaces Automotive Thermoelectric Moduleswith Scalable Thermo- and Electro-Mechanical Interfaces Interface materials based on...

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

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

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

  16. Calculated thermoelectric properties of InxGa1-xN, InxAl1-xN, and AlxGa1-xN

    E-Print Network [OSTI]

    Sztein, Alexander; Haberstroh, John; Bowers, John E; DenBaars, Steven P; Nakamura, Shuji

    2013-01-01T23:59:59.000Z

    183707 (2013) Calculated thermoelectric properties of In xonline 10 May 2013) The thermoelectric properties of III-In order to predict thermoelectric performances and identify

  17. ADVANCED RADIOISOTOPE HEAT SOURCE AND PROPULSION SYSTEMS FOR PLANETARY EXPLORATION

    SciTech Connect (OSTI)

    R. C. O'Brien; S. D. Howe; J. E. Werner

    2010-09-01T23:59:59.000Z

    The exploration of planetary surfaces and atmospheres may be enhanced by increasing the range and mobility of a science platform. Fundamentally, power production and availability of resources are limiting factors that must be considered for all science and exploration missions. A novel power and propulsion system is considered and discussed with reference to a long-range Mars surface exploration mission with in-situ resource utilization. Significance to applications such as sample return missions is also considered. Key material selections for radioisotope encapsulation techniques are presented.

  18. A microscopic mechanism for increasing thermoelectric efficiency

    E-Print Network [OSTI]

    Keiji Saito; Giuliano Benenti; Giulio Casati

    2010-05-26T23:59:59.000Z

    We study the coupled particle and energy transport in a prototype model of interacting one-dimensional system: the disordered hard-point gas, for which numerical data suggest that the thermoelectric figure of merit ZT diverges with the system size. This result is explained in terms of a microscopic mechanism, namely the local equilibrium is characterized by the emergence of a broad stationary "modified Maxwell-Boltzmann velocity distribution", of width much larger than the mean velocity of the particle flow.

  19. General Relativistic Thermoelectric Effects in Superconductors

    E-Print Network [OSTI]

    B. J. Ahmedov

    2007-01-13T23:59:59.000Z

    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.

  20. Design and development of thermoelectric generator

    SciTech Connect (OSTI)

    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

    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 %.

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

    E-Print Network [OSTI]

    Cronin, Steve

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

  2. Thermoelectric Transport Properties of Single Bismuth Nanowires S. B. Cronin1

    E-Print Network [OSTI]

    Cronin, Steve

    Thermoelectric Transport Properties of Single Bismuth Nanowires S. B. Cronin1 , Y.-M. Lin3 , M thermoelectric material. Bi nanowires, however, have been predicted to have a high thermoelectric efficiency [1,2]. The thermoelectric enhancement is based on the sharp features in the one-dimensional density of states

  3. IEEE TRANSACTIONS ON ELECTRON DEVICES, VOL. 55, NO. 1, JANUARY 2008 423 Quantum Modeling of Thermoelectric

    E-Print Network [OSTI]

    Walker, D. Greg

    of Thermoelectric Properties of Si/Ge/Si Superlattices Anuradha Bulusu and D. Greg Walker Abstract, thermoelectric. I. INTRODUCTION THE EFFICIENCY of thermoelectric materials is usually characterized by the dimensionless thermoelectric figure of merit ZT = (S2 T)/, where S is the Seebeck coefficient

  4. Intersociety Energy Conversion Engineering Conference Proc., Vancouver, BC, Canada, 992569 (1999) Miniaturized Thermoelectric Power Sources

    E-Print Network [OSTI]

    1999-01-01T23:59:59.000Z

    is the discovery and infusion of novel thermoelectric materials more efficient above room temperature than

  5. Radioisotope Electric Propulsion for Deep Space Sample Return

    SciTech Connect (OSTI)

    Noble, Robert J.; /SLAC

    2009-07-14T23:59:59.000Z

    The need to answer basic questions regarding the origin of the Solar System will motivate robotic sample return missions to destinations like Pluto, its satellite Charon, and objects in the Kuiper belt. To keep the mission duration short enough to be of interest, sample return from objects farther out in the Solar System requires increasingly higher return velocities. A sample return mission involves several complicated steps to reach an object and obtain a sample, but only the interplanetary return phase of the mission is addressed in this paper. Radioisotope electric propulsion is explored in this parametric study as a means to propel small, dedicated return vehicles for transferring kilogram-size samples from deep space to Earth. Return times for both Earth orbital rendezvous and faster, direct atmospheric re-entry trajectories are calculated for objects as far away as 100 AU. Chemical retro-rocket braking at Earth is compared to radioisotope electric propulsion but the limited deceleration capability of chemical rockets forces the return trajectories to be much slower.

  6. Thermoelectric Behavior of Flexible Organic Nanocomposites with Carbon Nanotubes

    E-Print Network [OSTI]

    Choi, Kyung Who

    2013-12-03T23:59:59.000Z

    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....

  7. High Temperature Variable Conductance Heat Pipes for Radioisotope Stirling Systems

    SciTech Connect (OSTI)

    Tarau, Calin; Walker, Kara L.; Anderson, William G. [Advanced Cooling Technologies, Inc. 1046 New Holland Ave. Lancaster, PA 17601 (United States)

    2009-03-16T23:59:59.000Z

    In a Stirling radioisotope system, heat must continually be removed from the GPHS modules, to maintain the GPHS modules and surrounding insulation at acceptable temperatures. Normally, the Stirling converter provides this cooling. If the Stirling engine stops in the current system, the insulation is designed to spoil, preventing damage to the GPHS, but also ending the mission. An alkali-metal Variable Conductance Heat Pipe (VCHP) is under development to allow multiple stops and restarts of the Stirling engine. The status of the ongoing effort in developing this technology is presented in this paper. An earlier, preliminary design had a radiator outside the Advanced Stirling Radioisotope Generator (ASRG) casing, used NaK as the working fluid, and had the reservoir located on the cold side adapter flange. The revised design has an internal radiator inside the casing, with the reservoir embedded inside the insulation. A large set of advantages are offered by this new design. In addition to reducing the overall size and mass of the VCHP, simplicity, compactness and easiness in assembling the VCHP with the ASRG are significantly enhanced. Also, the permanently elevated temperatures of the entire VCHP allows the change of the working fluid from a binary compound (NaK) to single compound (Na). The latter, by its properties, allows higher performance and further mass reduction of the system. Preliminary design and analysis shows an acceptable peak temperature of the ASRG case of 140 deg. C while the heat losses caused by the addition of the VCHP are 1.8 W.

  8. Thermoelectric DC conductivities from black hole horizons

    E-Print Network [OSTI]

    Aristomenis Donos; Jerome P. Gauntlett

    2014-10-14T23:59:59.000Z

    An analytic expression for the DC electrical conductivity in terms of black hole horizon data was recently obtained for a class of holographic black holes exhibiting momentum dissipation. We generalise this result to obtain analogous expressions for the DC thermoelectric and thermal conductivities. We illustrate our results using some holographic Q-lattice black holes as well as for some black holes with linear massless axions, in both $D=4$ and $D=5$ bulk spacetime dimensions, which include both spatially isotropic and anisotropic examples. We show that some recently constructed ground states of holographic Q-lattices, which can be either electrically insulating or metallic, are all thermal insulators.

  9. Solid state transport-based thermoelectric converter

    DOE Patents [OSTI]

    Hu, Zhiyu

    2010-04-13T23:59:59.000Z

    A solid state thermoelectric converter includes a thermally insulating separator layer, a semiconducting collector and an electron emitter. The electron emitter comprises a metal nanoparticle layer or plurality of metal nanocatalyst particles disposed on one side of said separator layer. A first electrically conductive lead is electrically coupled to the electron emitter. The collector layer is disposed on the other side of the separator layer, wherein the thickness of the separator layer is less than 1 .mu.m. A second conductive lead is electrically coupled to the collector layer.

  10. Energy harvesting using a thermoelectric material

    DOE Patents [OSTI]

    Nersessian, Nersesse (Van Nuys, CA); Carman, Gregory P. (Los Angeles, CA); Radousky, Harry B. (San Leandro, CA)

    2008-07-08T23:59:59.000Z

    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.

  11. Studies of bulk materials for thermoelectric cooling

    SciTech Connect (OSTI)

    Sharp, J.W.; Nolas, G.S.; Volckmann, E.H.

    1997-07-01T23:59:59.000Z

    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.

  12. 2009 Thermoelectrics Applications Workshop | 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 onYouTube YouTube Note: Since the YouTube platform is always evolving, so are1703ConferenceThermoelectrics Applications

  13. 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 DataDepartment of Energy Your Density Isn't Your Destiny: Theof"Wave the WhiteNational|ofSeptember 3, 2013 Leotek:forThermoelectric

  14. 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 DataDepartment of Energy Your DensityEnergy U.S.-China Electric Vehicle and03/02Report | Department of|Thermoelectrics Applications

  15. Experimental Study of Thermodiffusion and Thermoelectricity in Charged Colloids

    E-Print Network [OSTI]

    B. T. Huang; M. Roger; M. Bonetti; T. J. Salez; C. Wiertel-Gasquet; E. Dubois; R. Cabreira Gomes; G. Demouchy; G. Mériguet; V. Peyre; M. Kouyaté; C. L. Filomeno; J. Depeyrot; F. A. Tourinho; R. Perzynski; S. Nakamae

    2015-03-30T23:59:59.000Z

    The Seebeck and Soret coefficients of ionically stabilized suspension of maghemite nanoparticles in dimethyl sulfoxide are experimentally studied as a function of nanoparticle volume fraction. In the presence of a temperature gradient, the charged colloidal nanoparticles experience both thermal drift due to their interactions with the solvent molecules and electric forces proportional to the internal thermoelectric field. The resulting thermodiffusion of nanoparticles is observed through Forced Rayleigh scattering, while the thermoelectric field is accessed through voltage measurements in a thermocell. Both techniques provide independent estimates of nanoparticle's entropy of transfer as high as 75 meV/K. Such a property may be used to improve the thermoelectric coefficients in liquid thermocells.

  16. Microscreen radiation shield for thermoelectric generator

    DOE Patents [OSTI]

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

    1990-01-01T23:59:59.000Z

    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.

  17. 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

  18. Thermo-electrically pumped semiconductor light emitting diodes

    E-Print Network [OSTI]

    Santhanam, Parthiban

    2014-01-01T23:59:59.000Z

    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. ...

  19. Fiber optic signal amplifier using thermoelectric power generation

    DOE Patents [OSTI]

    Hart, M.M.

    1993-01-01T23:59:59.000Z

    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.

  20. 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...

  1. Oxide based thermoelectric materials for large scale power generation

    E-Print Network [OSTI]

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

    2008-01-01T23:59:59.000Z

    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 ...

  2. Fiber optic signal amplifier using thermoelectric power generation

    DOE Patents [OSTI]

    Hart, Mark M. (Aiken, SC)

    1995-01-01T23:59:59.000Z

    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.

  3. Modeling of thin-film solar thermoelectric generators

    E-Print Network [OSTI]

    Weinstein, Lee Adragon

    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. ...

  4. Enhanced thermoelectric properties in hybrid graphene-boron nitride nanoribbons

    E-Print Network [OSTI]

    Kaike Yang; Yuanping Chen; Roberto D'Agosta; Yuee Xie; Jianxin Zhong; Angel Rubio

    2012-04-06T23:59:59.000Z

    The thermoelectric properties of hybrid graphene-boron nitride nanoribbons (BCNNRs) are investigated using the non-equilibrium Green's function (NEGF) approach. We find that the thermoelectric figure of merit (ZT) can be remarkably enhanced by periodically embedding hexagonal BN (h-BN) into graphene nanoribbons (GNRs). Compared to pristine GNRs, the ZT for armchair-edged BCNNRs with width index 3p+2 is enhanced up to 10~20 times while the ZT of nanoribbons with other widths is enhanced just by 1.5~3 times. As for zigzag-edge nanoribbons, the ZT is enhanced up to 2~3 times. This improvement comes from the combined increase in the Seebeck coefficient and the reduction in the thermal conductivity outweighing the decrease in the electrical conductance. In addition, the effect of component ratio of h-BN on the thermoelectric transport properties is discussed. These results qualify BCNNRs as a promising candidate for building outstanding thermoelectric devices.

  5. Origin of anomalous atomic vibrations in efficient thermoelectrics...

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

    White arrows point out anomalous double-peak in PbTe, which is absent in SnTe. Thermoelectric SnTe and PbTe compounds were investigated with inelastic neutron scattering (INS)...

  6. Thermoelectric skutterudite compositions and methods for producing the same

    DOE Patents [OSTI]

    Ren, Zhifeng; Yang, Jian; Yan, Xiao; He, Qinyu; Chen, Gang; Hao, Qing

    2014-11-11T23:59:59.000Z

    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.

  7. Controlling microstructure of nanocrystalline thermoelectrics through powder processing

    E-Print Network [OSTI]

    Humphry-Baker, Samuel A

    2014-01-01T23:59:59.000Z

    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 ...

  8. ANSYS Thermoelectric Generator (TEG) Preparing the ANSYS Workbench

    E-Print Network [OSTI]

    Lee, Ho Sung

    ANSYS Thermoelectric Generator (TEG) Tutorial Preparing the ANSYS Workbench 1) Go Start Menu All-click Thermal-Electric at the top of the Project Schematic pane and select Rename as TEG Ex 3.1 Tutorial. 4

  9. Enhanced thermoelectric properties in hybrid graphene-boron nitride nanoribbons

    E-Print Network [OSTI]

    Yang, Kaike; D'Agosta, Roberto; Xie, Yuee; Zhong, Jianxin; Rubio, Angel

    2012-01-01T23:59:59.000Z

    The thermoelectric properties of hybrid graphene-boron nitride nanoribbons (BCNNRs) are investigated using the non-equilibrium Green's function (NEGF) approach. We find that the thermoelectric figure of merit (ZT) can be remarkably enhanced by periodically embedding hexagonal BN (h-BN) into graphene nanoribbons (GNRs). Compared to pristine GNRs, the ZT for armchair-edged BCNNRs with width index 3p+2 is enhanced up to 10~20 times while the ZT of nanoribbons with other widths is enhanced just by 1.5~3 times. As for zigzag-edge nanoribbons, the ZT is enhanced up to 2~3 times. This improvement comes from the combined increase in the Seebeck coefficient and the reduction in the thermal conductivity outweighing the decrease in the electrical conductance. In addition, the effect of component ratio of h-BN on the thermoelectric transport properties is discussed. These results qualify BCNNRs as a promising candidate for building outstanding thermoelectric devices.

  10. New nano structure approaches for bulk thermoelectric materials

    E-Print Network [OSTI]

    Kim, Jeonghoon

    2010-01-01T23:59:59.000Z

    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

  11. Recovering Industrial Waste Heat by the Means of Thermoelectricity

    E-Print Network [OSTI]

    Kjelstrup, Signe

    as a heat pump) to the surroundings. This heat was interpreted as the lost work of the device. The aimRecovering Industrial Waste Heat by the Means of Thermoelectricity Spring 2010 Department

  12. High-density thermoelectric power generation and nanoscale thermal metrology

    E-Print Network [OSTI]

    Mayer, Peter (Peter Matthew), 1978-

    2007-01-01T23:59:59.000Z

    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 ...

  13. Fiber optic signal amplifier using thermoelectric power generation

    DOE Patents [OSTI]

    Hart, M.M.

    1995-04-18T23:59:59.000Z

    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.

  14. CEC-500-2010-FS-018 Automotive Thermoelectric

    E-Print Network [OSTI]

    will also be achieved by incorporating thermoelectric waste heat generators into the system design to convert waste heat (exhaust gas) into electrical energy. PIER Program Objectives and Anticipated Benefits

  15. From Heat to Electricity: How "nano" Saved Thermoelectrics

    E-Print Network [OSTI]

    Kanatzidis, Mercouri G

    , reliable #12;Thermoelectric applications Waste heat recovery · Automobiles · Over the road trucks% of energy becomes waste heat, even a 10% capture and conversion to useful forms can have huge impact

  16. Evaluating the potential for high thermoelectric efficiency of silver selenide

    E-Print Network [OSTI]

    Martin, Alain

    for cooling applications as well as up to 600 K for waste heat recovery. 1 Introduction Thermoelectric application of an electric current, show promise as efficient harvesters of waste heat from industrial

  17. RADIOISOTOPE IDENTIFICATION OF SHIELDED AND MASKED SNM RDD MATERIALS

    SciTech Connect (OSTI)

    Salaymeh, S.; Jeffcoat, R.

    2010-06-17T23:59:59.000Z

    Sonar and speech techniques have been investigated to improve functionality and enable handheld and other man-portable, mobile, and portal systems to positively detect and identify illicit nuclear materials, with minimal data and with minimal false positives and false negatives. RadSonar isotope detection and identification is an algorithm development project funded by NA-22 and employing the resources of Savannah River National Laboratory and three University Laboratories (JHU-APL, UT-ARL, and UW-APL). Algorithms have been developed that improve the probability of detection and decrease the number of false positives and negatives. Two algorithms have been developed and tested. The first algorithm uses support vector machine (SVM) classifiers to determine the most prevalent nuclide(s) in a spectrum. It then uses a constrained weighted least squares fit to estimate and remove the contribution of these nuclide(s) to the spectrum, iterating classification and fitting until there is nothing of significance left. If any Special Nuclear Materials (SNMs) were detected in this process, a second tier of more stringent classifiers are used to make the final SNM alert decision. The second algorithm is looking at identifying existing feature sets that would be relevant in the radioisotope identification context. The underlying philosophy here is to identify parallels between the physics and/or the structures present in the data for the two applications (speech analysis and gamma spectroscopy). The expectation is that similar approaches may work in both cases. The mel-frequency cepstral representation of spectra is widely used in speech, particularly for two reasons: approximation of the response of the human ear, and simplicity of channel effect separation (in this context, a 'channel' is a method of signal transport that affects the signal, examples being vocal tract shape, room echoes, and microphone response). Measured and simulated gamma-ray spectra from a hand-held Radioisotope Identification Device were used to evaluate the algorithms. This paper will present and discuss results of the Test and Evaluation performed on two algorithms produced from the project.

  18. Thermoelectric generator and method for the fabrication thereof

    DOE Patents [OSTI]

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

    1987-01-01T23:59:59.000Z

    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.

  19. Thermoelectric generator and method for the fabrication thereof

    DOE Patents [OSTI]

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

    1984-08-01T23:59:59.000Z

    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.

  20. Quantum interference in thermoelectric molecular junctions: A toy model perspective

    SciTech Connect (OSTI)

    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

    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.

  1. Radioisotope-based Nuclear Power Strategy for Exploration Systems Development

    SciTech Connect (OSTI)

    Schmidt, George R.; Houts, Michael G. [NASA Marshall Space Flight Center, Huntsville, AL 35812 (United States)

    2006-01-20T23:59:59.000Z

    Nuclear power will play an important role in future exploration efforts. Its benefits pertain to practically all the different timeframes associated with the Exploration Vision, from robotic investigation of potential lunar landing sites to long-duration crewed missions on the lunar surface. However, the implementation of nuclear technology must follow a logical progression in capability that meets but does not overwhelm the power requirements for the missions in each exploration timeframe. It is likely that the surface power infrastructure, particularly for early missions, will be distributed in nature. Thus, nuclear sources will have to operate in concert with other types of power and energy storage systems, and must mesh well with the power architectures envisioned for each mission phase. Most importantly, they must demonstrate a clear advantage over other non-nuclear options (e.g., solar power, fuel cells) for their particular function. This paper describes a strategy that does this in the form of three sequential system developments. It begins with use of radioisotope generators currently under development, and applies the power conversion technology developed for these units to the design of a simple, robust reactor power system. The products from these development efforts would eventually serve as the foundation for application of nuclear power systems for exploration of Mars and beyond.

  2. Nanoscale Engineering for the Design of Efficient Inorganic-Organic Hybrid Thermoelectrics 

    E-Print Network [OSTI]

    Brockway, Lance Robert

    2014-04-14T23:59:59.000Z

    of the prediction that nanostructuring could increase the thermoelectric performance of materials; semiconductor nanowires comprised of non-toxic, low cost, and earthabundant elements were synthesized and studied for their thermoelectric performance...

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

    E-Print Network [OSTI]

    Xu, Xianfan

    the nanowire powder through spark plasma sintering have been investigated. Compared to the current commercial n and a reproducible way. KEYWORDS: Bi2Te3, nanowires, thermoelectric, spark plasma sintering Thermoelectric materials

  4. 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

  5. Review of Interests and Activities in Thermoelectric Materials and Devices at the Army Research Laboratory

    Broader source: Energy.gov [DOE]

    Army interests in thermoelectrics include integrated TE-hand-held burners for battery-replacement, waste-heat recovery on vehicles, heat-powered mobile units, and for thermoelectric cooling of high-performance infrared systems for surveillance

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

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

    an Underamor 1-kW Thermoelectric Generator Waste Heat Recovery System for Military Vehicles Development of an Underamor 1-kW Thermoelectric Generator Waste Heat Recovery System for...

  7. Thick and Thin Film Polymer CNT Nanocomposites for Thermoelectric Energy Conversion and Transparent Electrodes

    E-Print Network [OSTI]

    Fisher, Frank

    Thick and Thin Film Polymer ­ CNT Nanocomposites for Thermoelectric Energy Conversion gradient. Thermoelectric materials harvest electricity from waste heat or any temperature gradient]. The PDDA/(SWNT+DOC) system produced transparent (> 82% visible light transmittance) and electrically

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

    E-Print Network [OSTI]

    Xu, Xianfan

    Thermoelectric Generators for Automotive Waste Heat Recovery Systems Part I: Numerical Modeling (TEG) designed for automotive waste heat recovery systems. This model is capable of computing bismuth telluride are considered for thermoelectric modules (TEMs) for conversion of waste heat from

  9. Combustion Synthesis of Doped Thermoelectric Oxides

    SciTech Connect (OSTI)

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

    2012-01-01T23:59:59.000Z

    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.

  10. The thermoelectric properties of inhomogeneous holographic lattices

    E-Print Network [OSTI]

    Aristomenis Donos; Jerome P. Gauntlett

    2015-01-22T23:59:59.000Z

    We consider inhomogeneous, periodic, holographic lattices of D=4 Einstein-Maxwell theory. We show that the DC thermoelectric conductivity matrix can be expressed analytically in terms of the horizon data of the corresponding black hole solution. We numerically construct such black hole solutions for lattices consisting of one, two and ten wave-numbers. We numerically determine the AC electric conductivity which reveals Drude physics as well as resonances associated with sound modes. No evidence for an intermediate frequency scaling regime is found. All of the monochromatic lattice black holes that we have constructed exhibit scaling behaviour at low temperatures which is consistent with the appearance of $AdS_2\\times\\mathbb{R}^2$ in the far IR at T=0.

  11. Coherent Thermoelectric Effects in Mesoscopic Andreev Interferometers

    E-Print Network [OSTI]

    Ph. Jacquod; R. S. Whitney

    2009-10-15T23:59:59.000Z

    We investigate thermoelectric transport through Andreev interferometers. We show that the ratio of the thermal and the charge conductance exhibits large oscillations with the phase difference $\\phi$ between the two superconducting contacts, and that the Wiedemann-Franz law holds only when $\\phi=\\pi$. A large average thermopower furthermore emerges whenever there is an asymmetry in the dwell times to reach the superconducting contacts. When this is the case, the thermopower is odd in $\\phi$. In contrast, when the average times to reach either superconducting contact are the same, the average thermopower is zero, however mesoscopic effects (analogous to universal conductance fluctuations) lead to a sample-dependent thermopower which is systematically even in $\\phi$.

  12. Thermoelectric transport through strongly correlated quantum dots

    E-Print Network [OSTI]

    Costi, T A; 10.1103/PhysRevB.81.235127

    2010-01-01T23:59:59.000Z

    The thermoelectric properties of strongly correlated quantum dots, described by a single level Anderson model coupled to conduction electron leads, is investigated using Wilson's numerical renormalization group method. We calculate the electronic contribution, $K_{\\rm e}$, to the thermal conductance, the thermopower, $S$, and the electrical conductance, $G$, of a quantum dot as a function of both temperature, $T$, and gate voltage, ${\\rm v}_g$, for strong, intermediate and weak Coulomb correlations, $U$, on the dot. For strong correlations and in the Kondo regime, we find that the thermopower exhibits two sign changes, at temperatures $T_{1}({\\rm v}_g)$ and $T_{2}({\\rm v}_g)$ with $T_{1}law in ...

  13. Imaging Narrow Angle The Voyager Spacecraft

    E-Print Network [OSTI]

    Waliser, Duane E.

    ) Radioisotope Thermoelectric Generator (3) Planetary Radio Astronomy and Plasma Wave Antenna (2) Optical

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

    E-Print Network [OSTI]

    Sanahuja, Blai

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

  15. One Hundred Eleventh Congress United States of America

    E-Print Network [OSTI]

    -going restoration of radioisotope thermoelectric generator material production. Sec. 807. Collaboration with ESMD

  16. Imaging Three-Dimensional Heliosphere in EUV Mike Gruntman1

    E-Print Network [OSTI]

    California at Berkeley, University of

    -2025 at the distance 150 AU because of the decreasing efficiency of its radioisotope thermoelectric generators

  17. What's so cool about Curiosity? Curiosity, the Mars Science Laboratory, is the largest and most complicated device we have ever landed on a

    E-Print Network [OSTI]

    National Laboratory. The Radioisotope Thermoelectric Generator supplies electricity and heat to the rover

  18. The Astrophysical Journal Supplement Series, 199:11 (6pp), 2012 March doi:10.1088/0067-0049/199/1/11 C 2012. The American Astronomical Society. All rights reserved. Printed in the U.S.A.

    E-Print Network [OSTI]

    Neptune encounter. Due to declining power from the radioisotope thermoelectric generators (RTG) which

  19. Nanograin effects on the thermoelectric properties of poly-Si nanowires N.Neophytou1

    E-Print Network [OSTI]

    1 Nanograin effects on the thermoelectric properties of poly-Si nanowires N.Neophytou1 , X.Zianni2 a theoretical analysis of the thermoelectric performance of polycrystalline Si NWs by considering both electron) have attracted significant attention as efficient thermoelectric materials mostly due to significant

  20. Effects of Confinement and Orientation on the Thermoelectric Power Factor of Silicon Nanowires

    E-Print Network [OSTI]

    1 Effects of Confinement and Orientation on the Thermoelectric Power Factor of Silicon Nanowires dimensionality can improve the thermoelectric (TE) power factor of a device, offering an enhancement of the ZT analysis of the thermoelectric coefficients of n-type and p-type NWs of diameters from 12nm down to 3nm

  1. Thermoelectric properties of high quality nanostructured Ge:Mn thin D. Tanoff2*

    E-Print Network [OSTI]

    Boyer, Edmond

    Thermoelectric properties of high quality nanostructured Ge:Mn thin films D. Taïnoff2* , A. Barski2 nanostructured thin films and the measurement of their thermoelectric properties. We investigate the growth of Ge temperature thermoelectric properties of these layers containing spherical inclusions are discussed regarding

  2. Analysis of Thermoelectric Properties of Scaled Silicon Nanowires Using an Atomistic Tight-Binding Model

    E-Print Network [OSTI]

    1 Analysis of Thermoelectric Properties of Scaled Silicon Nanowires Using an Atomistic Tight Abstract Low dimensional materials provide the possibility of improved thermoelectric performance due. As a result of suppressed phonon conduction, large improvements on the thermoelectric figure of merit, ZT

  3. Numerical study of the thermoelectric power factor in ultra-thin Si nanowires

    E-Print Network [OSTI]

    1 Numerical study of the thermoelectric power factor in ultra-thin Si nanowires Neophytos Neophytou thermoelectric (TE) performance because of a drastic reduction in their thermal conductivity, l. This has been observed for a variety of materials, even for traditionally poor thermoelectrics such as silicon. Other

  4. Atomistic calculations of the electronic, thermal, and thermoelectric properties of ultra-thin Si layers

    E-Print Network [OSTI]

    1 Atomistic calculations of the electronic, thermal, and thermoelectric properties of ultra-thin Si are considered promising candidates for thermoelectric applications with enhanced performance because. This is also the case for traditionally poor thermoelectric materials such as silicon. This work presents

  5. Energy-Harvesting Thermoelectric Sensing for Unobtrusive Water and Appliance Metering

    E-Print Network [OSTI]

    Dutta, Prabal

    Energy-Harvesting Thermoelectric Sensing for Unobtrusive Water and Appliance Metering Bradford that meters using the same thermoelectric generator with which it powers itself. In short, the rate at which be harvested with a thermoelectric generator (TEG) to power a sensor node. TEGs utilize the Seebeck effect

  6. The effect of a multivalley energy band structure on the thermoelectric figure of merit

    E-Print Network [OSTI]

    Boyer, Edmond

    L-49 The effect of a multivalley energy band structure on the thermoelectric figure of merit D. M A comparison is drawn between the dimensionless thermoelectric figure of merit of a multivalleyed semiconductor a multivalleyed semiconductor in thermoelectric applications it is concluded that the beneficial effect

  7. Thermoelectric Rotating Torus for Fusion A. B. Hassam and Yi-Min Huang

    E-Print Network [OSTI]

    Hassam, Adil

    Thermoelectric Rotating Torus for Fusion A. B. Hassam and Yi-Min Huang Institute for Plasma power maintains the rotation and also heats the plasma. The thermoelectric effect from the resultingRevLett.91.195002 PACS numbers: 52.58.­c, 52.30.­q, 52.55.­s In magnetized plasma, thermoelectric currents

  8. 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 of thermoelectric genera- tors (TEGs) by using a lens to concentrate heat on the heat source of a TEG. Initial : Thermoelectric generator, Solar heat concentrator, Carnot efficiency I - Introduction The global energy crisis

  9. Thermoelectric generator fabricated via laser-induced forward transfer M.Feinaeugle1

    E-Print Network [OSTI]

    Thermoelectric generator fabricated via laser-induced forward transfer M.Feinaeugle1 , C.L. Sones1 of a thermoelectric generator with the rapid, lithography-less technique of laser-induced forward transfer (LIFT on one substrate. The design of the proposed thermoelectric generator was selected to demonstrate

  10. Gated Si nanowires for large thermoelectric power factors Neophytos Neophytou1

    E-Print Network [OSTI]

    1 Gated Si nanowires for large thermoelectric power factors Neophytos Neophytou1 and Hans Kosina2 1.Neophytou@warwick.ac.uk Abstract We investigate the effect of electrostatic gating on the thermoelectric power factor of p-type Si, coupled to linearized Boltzmann transport equation for the calculation of the thermoelectric coefficients

  11. Gate-modulated thermoelectric conversion in disordered nanowires: I. Low temperature coherent regime

    E-Print Network [OSTI]

    Recanati, Catherine

    Gate-modulated thermoelectric conversion in disordered nanowires: I. Low temperature coherent as promising thermoelectric devices1 . In comparison to their bulk counterparts, they provide opportunities of thermoelectric conversion at a given temperature T . Indeed, they allow to reduce the phonon contribution ph

  12. Thermoelectric Effect across the Metal-Insulator Domain Walls in VO2

    E-Print Network [OSTI]

    Wu, Junqiao

    Thermoelectric Effect across the Metal-Insulator Domain Walls in VO2 Microbeams J. Cao,,, W. Fan-performance thermoelectric materials are currently one of the focuses in materials research for energy conversion technologies.1-4 A good thermoelectric material should have a relatively high thermopower (Seebeck coefficient

  13. Apparatus for thermoelectric power measurements on metals and alloys in the liquid state.

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    595 Apparatus for thermoelectric power measurements on metals and alloys in the liquid state, for the determination of absolute thermoelectric power of liquid metals is described. The apparatus has been tested results for cadmium antimony alloys are reported. A change of sign of the thermoelectric power, versus

  14. Thermoelectric Properties of p-Type PbSe Nanowires Wenjie Liang1,3

    E-Print Network [OSTI]

    Yang, Peidong

    Thermoelectric Properties of p-Type PbSe Nanowires Wenjie Liang1,3 , Oded Rabin1,4 , Allon I-009-9039-2 Research Article Address correspondence to p_yang@berkeley.edu ABSTRACT The thermoelectric properties to 300 K. Thermal annealing of the PbSe nanowires allowed their thermoelectric properties

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

    E-Print Network [OSTI]

    Minority-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 for thermoelectric effects in a p-n diode (a prototypical electronic and optoelectronic component) where diffusion

  16. Stresa, Italy, 26-28 April 2006 ENERGY CONVERSION USING NEW THERMOELECTRIC GENERATOR

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Stresa, Italy, 26-28 April 2006 ENERGY CONVERSION USING NEW THERMOELECTRIC GENERATOR G. Savelli1: photolithography and deposition methods allow to elaborate thin thermoelectric structures at the micro-scale level. Micro thermoelectric converters are a promising technology due to the high reliability, quiet operation

  17. Thermoelectric figure of merit as a function of carrier propagation angle in semiconducting superlattices

    E-Print Network [OSTI]

    Carlson, Erica

    Thermoelectric figure of merit as a function of carrier propagation angle in semiconducting;Thermoelectric figure of merit as a function of carrier propagation angle in semiconducting superlattices Shuo a fruitful approach for enhancing the figure of merit, ZT, of thermoelectric materials. Generally

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

    E-Print Network [OSTI]

    Zhou, Hong

    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 of a thermoelectric generator is insensitive to both the electrical resistivity and thermal conductivity. However

  19. Review of State of the Art Technologies used to Improve Performance of Thermoelectric Devices

    E-Print Network [OSTI]

    Walker, D. Greg

    Review of State of the Art Technologies used to Improve Performance of Thermoelectric Devices 19 th University Nashville, TN 37221 greg.walker@vanderbilt.edu Thermoelectric devices have gained importance focused towards developing both thermoelectric structures and materials that have high efficiency

  20. Spin-dependent thermoelectric transport coefficients in near perfect quantum wires A. Ramsak,1,2

    E-Print Network [OSTI]

    Ramsak, Anton

    Spin-dependent thermoelectric transport coefficients in near perfect quantum wires T. Rejec,1 A 2002 Thermoelectric transport coefficients are determined for semiconductor quantum wires with weak in thermoelectric coefficients are also found in standard strongly correlated systems: the Anderson model,6

  1. Theory of thermoelectric phenomena in superconductors Y. M. Galperin,1,2

    E-Print Network [OSTI]

    Johansen, Tom Henning

    Theory of thermoelectric phenomena in superconductors Y. M. Galperin,1,2 V. L. Gurevich,2 V. I 2000; revised manuscript received 26 March 2001; published 24 January 2002 The theory of thermoelectric of the present paper is to discuss some as- pects of the kinetic approach to the thermoelectric properties

  2. Thermoelectric Transport in a ZrN/ScN Superlattice MONA ZEBARJADI,1

    E-Print Network [OSTI]

    Thermoelectric Transport in a ZrN/ScN Superlattice MONA ZEBARJADI,1 ZHIXI BIAN,1 RAJEEV SINGH,1 ALI for a high thermoelectric figure of merit. The thermopower of these structures can be enhanced by controlling and experimental studies of the thermoelectric transport in ZrN/ScN metal/semiconductor superlattices. Preliminary

  3. Thermoelectric Properties Modeling of Bi2Te3 Seungwon Lee and Paul von Allmen

    E-Print Network [OSTI]

    Goddard III, William A.

    Thermoelectric Properties Modeling of Bi2Te3 Seungwon Lee and Paul von Allmen Jet propulsion/23/2005 Overview · Introduce EZTB a modeling tool for thermoelectric properties using a tight-binding model-binding parameters for Bi2Te3. · Present the accuracy of the modeling tool with the thermoelectric properties of Bi2

  4. Thermoelectric figure of merit calculations for semiconducting nanowires Jane E. Cornett1

    E-Print Network [OSTI]

    Anlage, Steven

    Thermoelectric figure of merit calculations for semiconducting nanowires Jane E. Cornett1 and Oded 2011 A model for the thermoelectric properties of nanowires was used to demonstrate the contrasting influences of quantization and degeneracy on the thermoelectric power factor. The prevailing notion

  5. Improved Thermoelectric Power Factor in Metal-Based Superlattices Daryoosh Vashaee and Ali Shakouri*

    E-Print Network [OSTI]

    Improved Thermoelectric Power Factor in Metal-Based Superlattices Daryoosh Vashaee and Ali Shakouri and thermoelectric transport perpendicular to heterostructure superlattices. This nonlinear transport regime above with tall barriers can achieve a large effective thermoelectric figure of merit (ZT > 5 at room temperature

  6. Thermoelectric power measurements of wide band gap semiconducting Chul-Ho Lee,1

    E-Print Network [OSTI]

    Kim, Philip

    Thermoelectric power measurements of wide band gap semiconducting nanowires Chul-Ho Lee,1 Gyu online 13 January 2009 We investigated the temperature-dependent thermoelectric power TEP of individual concentration in wide band gap semiconducting nano- wires employing temperature-dependent thermoelectric power

  7. Thermoelectric power factor enhancement by ionized nanoparticle scattering Je-Hyeong Bahk,1,a)

    E-Print Network [OSTI]

    Thermoelectric power factor enhancement by ionized nanoparticle scattering Je-Hyeong Bahk,1,a theoretically that the thermoelectric power factor can be enhanced in degenerate semiconductors when embedded intact. We find that the thermoelectric power factor of In0.53Ga0.47As from 300 K to 800 K is enhanced

  8. Assessing the Thermoelectric Properties of Sintered Compounds via High-Throughput Ab-Initio Calculations

    E-Print Network [OSTI]

    Curtarolo, Stefano

    Assessing the Thermoelectric Properties of Sintered Compounds via High-Throughput Ab Database have been considered as nanograined, sintered-powder thermoelectrics with the high-throughput ab the electronic band gap and the carrier effective mass, and that the probability of having large thermoelectric

  9. Large thermoelectric figure of merit in Si1-xGex nanowires Lihong Shi,1

    E-Print Network [OSTI]

    Li, Baowen

    Large thermoelectric figure of merit in Si1-xGex nanowires Lihong Shi,1 Donglai Yao,1 Gang Zhang,2 transport equation, we investigate composition effects on the thermoelectric properties of silicon thermoelectric figure of merit ZT Refs. 1­4 due to both enhancement in the power factor through increasing

  10. www.ceramics.org | American Ceramic Society Bulletin, Vol. 91, No. 334 thermoelectric

    E-Print Network [OSTI]

    McGaughey, Alan

    www.ceramics.org | American Ceramic Society Bulletin, Vol. 91, No. 334 Modeling thermoelectric. Thermoelectric devices have the advantage of containing no moving parts, making them quiet, durable and reliable that thermoelectric devic- es can compete with traditional refrigeration and power generation technologies.1

  11. On thermoelectric power conversion from heat re-circulating combustion systems F. J. Weinberg

    E-Print Network [OSTI]

    On thermoelectric power conversion from heat re-circulating combustion systems F. J. Weinberg Fax: 4420 7594 5604 Word count: 3750 Diags. equivalent: 1600 5350 #12;On thermoelectric power the absolute maximum efficiency of energy conversion by thermoelectric devices that operate as part of the heat

  12. Thermoelectric and Magnetothermoelectric Transport Measurements of Graphene Yuri M. Zuev,1

    E-Print Network [OSTI]

    Kim, Philip

    Thermoelectric and Magnetothermoelectric Transport Measurements of Graphene Yuri M. Zuev,1 Willy, USA (Received 7 December 2008; published 6 March 2009) The conductance and thermoelectric power (TEP of thermal and thermoelectric prop- erties of this two-dimensional material [2­8], only an indirect

  13. Mechanism for thermoelectric figure-of-merit enhancement in regimented quantum dot superlattices

    E-Print Network [OSTI]

    Mechanism for thermoelectric figure-of-merit enhancement in regimented quantum dot superlattices propose a mechanism for enhancement of the thermoelectric figure-of-merit in regimented quantum dot, as a result, to the thermoelectric figure-of-merit enhancement. To maximize the improvement, one has to tune

  14. THERMOELECTRIC POWER IN SEMICONDUCTING ALLOYS OF THE InPxAs1-x SYSTEM

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    883 THERMOELECTRIC POWER IN SEMICONDUCTING ALLOYS OF THE InPxAs1-x SYSTEM N. P. KEKELIDZE, Z. V'approche de InP. Abstract. 2014 A detailed analysis of the thermoelectric power and the Hall effect near room of measurements of the thermoelectric power and the Hall effect. The values of the electron effective masses were

  15. Nontoxic and Abundant Copper Zinc Tin Sulfide Nanocrystals for Potential High-Temperature Thermoelectric Energy Harvesting

    E-Print Network [OSTI]

    Chen, Yong P.

    and abundant copper zinc tin sulfide (CZTS) nanocrystals for potential thermoelectric applications. The CZTS sulfide (CZTS) as a nontoxic and abundant thermoelectric material and characterized its thermoelectric materials, the elements in the composition of CZTS are in extremely high abundancethe natural reserves

  16. RADIOISOTOPE POWER SYSTEM CAPABILITIES AT THE IDAHO NATIONAL LABORATORY (INL)

    SciTech Connect (OSTI)

    Kelly Lively; Stephen Johnson; Eric Clarke

    2014-07-01T23:59:59.000Z

    --Idaho National Laboratory’s, Space Nuclear Systems and Technology Division established the resources, equipment and facilities required to provide nuclear-fueled, Radioisotope Power Systems (RPS) to Department of Energy (DOE) Customers. RPSs are designed to convert the heat generated by decay of iridium clad, 238PuO2 fuel pellets into electricity that is used to power missions in remote, harsh environments. Utilization of nuclear fuel requires adherence to governing regulations and the INL provides unique capabilities to safely fuel, test, store, transport and integrate RPSs to supply power—supporting mission needs. Nuclear capabilities encompass RPS fueling, testing, handling, storing, transporting RPS nationally, and space vehicle integration. Activities are performed at the INL and in remote locations such as John F. Kennedy Space Center and Cape Canaveral Air Station to support space missions. This paper will focus on the facility and equipment capabilities primarily offered at the INL, Material and Fuel Complex located in a security-protected, federally owned, industrial area on the remote desert site west of Idaho Falls, ID. Nuclear and non-nuclear facilities house equipment needed to perform required activities such as general purpose heat source (GPHS) module pre-assembly and module assembly using nuclear fuel; RPS receipt and baseline electrical testing, fueling, vibration testing to simulate the launch environment, mass properties testing to measure the mass and compute the moment of inertia, electro-magnetic characterizing to determine potential consequences to the operation of vehicle or scientific instrumentation, and thermal vacuum testing to verify RPS power performance in the vacuum and cold temperatures of space.

  17. Proposal for a phase-coherent thermoelectric transistor

    SciTech Connect (OSTI)

    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

    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.

  18. Thermoelectric powered wireless sensors for spent fuel monitoring

    SciTech Connect (OSTI)

    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

    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)

  19. Thermoelectric transport through strongly correlated quantum dots

    E-Print Network [OSTI]

    T. A. Costi; V. Zlatic

    2010-07-08T23:59:59.000Z

    The thermoelectric properties of strongly correlated quantum dots, described by a single level Anderson model coupled to conduction electron leads, is investigated using Wilson's numerical renormalization group method. We calculate the electronic contribution, $K_{\\rm e}$, to the thermal conductance, the thermopower, $S$, and the electrical conductance, $G$, of a quantum dot as a function of both temperature, $T$, and gate voltage, ${\\rm v}_g$, for strong, intermediate and weak Coulomb correlations, $U$, on the dot. For strong correlations and in the Kondo regime, we find that the thermopower exhibits two sign changes, at temperatures $T_{1}({\\rm v}_g)$ and $T_{2}({\\rm v}_g)$ with $T_{1}< T_{2}$. Such sign changes in $S(T)$ are particularly sensitive signatures of strong correlations and Kondo physics. The relevance of this to recent thermopower measurements of Kondo correlated quantum dots is discussed. We discuss the figure of merit, power factor and the degree of violation of the Wiedemann-Franz law in quantum dots. The extent of temperature scaling in the thermopower and thermal conductance of quantum dots in the Kondo regime is also assessed.

  20. Thermoelectric properties of Weyl and Dirac semimetals

    E-Print Network [OSTI]

    Rex Lundgren; Pontus Laurell; Gregory A. Fiete

    2014-10-14T23:59:59.000Z

    We study the electronic contribution to the thermal conductivity and the thermopower of Weyl and Dirac semimetals using a semiclassical Boltzmann approach. We investigate the effect of various relaxation processes including disorder and interactions on the thermoelectric properties, and also consider doping away from the Weyl or Dirac point. We find that the thermal conductivity and thermopower have an interesting dependence on the chemical potential that is characteristic of the linear electronic dispersion, and that the electron-electron interactions modify the Lorenz number. For the interacting system, we also use the Kubo formalism to obtain the transport coefficients. We find exact agreement between the Kubo and Boltzmann approaches at high temperatures. We also consider the effect of electric and magnetic fields on the thermal conductivity in various orientations with respect to the temperature gradient. Notably, when the temperature gradient and magnetic field are parallel, we find a large contribution to the longitudinal thermal conductivity that is quadratic in the magnetic field strength, similar to the magnetic field dependence of the longitudinal electrical conductivity due to the presence of the chiral anomaly when no thermal gradient is present.

  1. Computational studies of novel thermoelectric materials

    SciTech Connect (OSTI)

    Singh, D.J.; Mazin, I.I.; Kim, S.G.; Nordstrom, L.

    1997-07-01T23:59:59.000Z

    The thermoelectric properties of La-filled skutterdites and {beta}-Zn{sub 4}Sb{sub 3} are discussed from the point of view of their electronic structures. These are calculated from first principles within the local density approximation. The electronic structures are in turn used to determine transport related quantities, {beta}-Zn{sub 4}Sb{sub 3} is found to be metallic with a complex Fermi surface topology, which yields a non-trivial dependence of the Hall concentration on the band filling. Calculations of the variation with band filling are used to extract the carrier concentration from the experimental Hall number. At this band filling, which corresponds to 0.1 electrons per 22 atom unit cell, the authors calculate a Seebeck coefficient and temperature dependence in good agreement with the experimental value. The high Seebeck coefficients in a metallic material are remarkable, and arise because of the strong energy dependence of the Fermiology near the experimental band filling. Virtual crystal calculations for La(Fe,Co){sub 4}Sb{sub 12}. The valence band maximum occurs at the {Gamma} point and is due to a singly degenerate dispersive (Fe,Co)-Sb band, which by itself would not be favorable for TE. However, very flat transition metal derived bands occur in close proximity and become active as the doping level is increased, giving a non-trivial dependence of the properties on carrier concentration and explaining the favorable TE properties.

  2. Miniature thermo-electric cooled cryogenic pump

    DOE Patents [OSTI]

    Keville, Robert F. (Valley Springs, CA)

    1997-01-01T23:59:59.000Z

    A miniature thermo-electric cooled cryogenic pump for removing residual water molecules from an inlet sample prior to sample analysis in a mass spectroscopy system, such as ion cyclotron resonance (ICR) mass spectroscopy. The cryogenic pump is a battery operated, low power (<1.6 watts) pump with a .DELTA.T=100.degree. C. characteristic. The pump operates under vacuum pressures of 5.times.10.sup.-4 Torr to ultra high vacuum (UHV) conditions in the range of 1.times.10.sup.-7 to 3.times.10.sup.-9 Torr and will typically remove partial pressure, 2.times.10.sup.-7 Torr, residual water vapor. The cryogenic pump basically consists of an inlet flange piece, a copper heat sink with a square internal bore, four two tier Peltier (TEC) chips, a copper low temperature square cross sectional tubulation, an electronic receptacle, and an exit flange piece, with the low temperature tubulation being retained in the heat sink at a bias angle of 5.degree., and with the TECs being positioned in parallel to each other with a positive potential being applied to the top tier thereof.

  3. Miniature thermo-electric cooled cryogenic pump

    DOE Patents [OSTI]

    Keville, R.F.

    1997-11-18T23:59:59.000Z

    A miniature thermo-electric cooled cryogenic pump is described for removing residual water molecules from an inlet sample prior to sample analysis in a mass spectroscopy system, such as ion cyclotron resonance (ICR) mass spectroscopy. The cryogenic pump is a battery operated, low power (<1.6 watts) pump with a {Delta}T=100 C characteristic. The pump operates under vacuum pressures of 5{times}10{sup {minus}4} Torr to ultra high vacuum (UHV) conditions in the range of 1{times}10{sup {minus}7} to 3{times}10{sup {minus}9} Torr and will typically remove partial pressure, 2{times}10{sup {minus}7} Torr, residual water vapor. The cryogenic pump basically consists of an inlet flange piece, a copper heat sink with a square internal bore, four two tier Peltier (TEC) chips, a copper low temperature square cross sectional tubulation, an electronic receptacle, and an exit flange piece, with the low temperature tubulation being retained in the heat sink at a bias angle of 5{degree}, and with the TECs being positioned in parallel to each other with a positive potential being applied to the top tier thereof. 2 figs.

  4. Overview of industry interest in new thermoelectric materials

    SciTech Connect (OSTI)

    Lyon, H.B. Jr.

    1997-07-01T23:59:59.000Z

    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.

  5. Thermoelectric efficiency of three-terminal quantum thermal machines

    E-Print Network [OSTI]

    Francesco Mazza; Riccardo Bosisio; Giuliano Benenti; Vittorio Giovannetti; Rosario Fazio; Fabio Taddei

    2014-08-28T23:59:59.000Z

    The efficiency of a thermal engine working in linear response regime in a multi-terminals configuration is discussed. For the generic three-terminal case, we provide a general definition of local and non-local transport coefficients: electrical and thermal conductances, and thermoelectric powers. Within the Onsager formalism, we derive analytical expressions for the efficiency at maximum power, which can be written in terms of generalized figures of merit. Also, using two examples, we investigate numerically how a third terminal could improve the performance of a quantum system, and under which conditions non-local thermoelectric effects can be observed.

  6. 0-7803-XXXX-X/06/$20.00 2006 IEEE 22nd IEEE SEMI-THERM Symposium Hot Spot Cooling using Embedded Thermoelectric Coolers

    E-Print Network [OSTI]

    Thermoelectric Coolers G. Jeffrey Snyder, Marco Soto, Randy Alley, David Koester, Bob Conner Nextreme Thermal spot temperatures when efficiently integrated with a heat spreader. Embedded thermoelectric cooling (e by today's advanced processors. Keywords Localized hot spot cooling. Thermoelectric, Peltier Cooling

  7. EIS-0373: Proposed Consolidation of Nuclear Operations Related to the Production of Radioisotope Power Systems

    Broader source: Energy.gov [DOE]

    NOTE: EIS-0373 has been cancelled. This EIS evaluates the environmental impacts of consolidating nuclear activities related to production of radioisotope power systems (RPS) for space and national security missions at a single DOE site: the preferred alternative is the Materials and Fuels Complex at Idaho National Laboratory.

  8. Insulators and Materials for Closed-Spaced Thermoelectric Modules

    SciTech Connect (OSTI)

    Donald P. Snowden

    2003-07-20T23:59:59.000Z

    The primary goal of this Phase I program has been accomplished: to demonstrate a ceramic, injection-molded eggcrate which will form the support structure for a close-spaced thermoelectric module which can operate at significantly higher temperatures than presently possible with such modules. It has been shown that yttria-stabilized zirconia is compatible at high temperatures with typical thermoelectric materials (TAGS, SnTE and PbTe) and that it can serve as a barrier between them to preclude cross-contamination and doping of the constituents of one leg type by those from the other. Using a 2 x 2 ceramic eggcrate, thermally sprayed molybdenum electrodes have been deposited on a test module which effectively seal each pocket, further reducing the possibility of migration of elements. Based on these results the next tasks are to refine the design of the injection tool and the injection parameters to produce consistent results and to allow increase in the size of the module to that on which commercial, high-temperature thermoelectric modules can be based. In addition, development of the fabrication techniques for segmented thermoelectric legs for use with these ceramic eggcrates at high temperatures must be continued.

  9. The Fundamentals of Thermoelectrics A bachelor's laboratory practical

    E-Print Network [OSTI]

    Ludwig-Maximilians-Universität, München

    to thermoelectrics 1 2 The thermocouple 4 3 The Peltier device 5 3.1 n- and p-type Peltier elements . . . . . . . . . . . . . . . . . . 5 3.2 Commercial Peltier devices . . . . . . . . . . . . . . . . . . . . 5 3.3 Electrical power.2 Measurements with the Peltier device . . . . . . . . . . . . . . 11 4.2.1 Warm-up procedure

  10. Molybdenum-platinum-oxide electrodes for thermoelectric generators

    DOE Patents [OSTI]

    Schmatz, Duane J. (Dearborn Heights, MI)

    1990-01-01T23:59:59.000Z

    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.

  11. Perspectives on thermoelectrics: from fundamentals to device applications

    E-Print Network [OSTI]

    Zebarjadi, M.

    2012-01-01T23:59:59.000Z

    This review is an update of a previous review (A. J. Minnich, et al., Energy Environ. Sci., 2009, 2, 466) published two years ago by some of the co-authors, focusing on progress made in thermoelectrics over the past two ...

  12. Universal formulae for thermoelectric transport with magnetic field and disorder

    E-Print Network [OSTI]

    Andrea Amoretti; Daniele Musso

    2015-02-09T23:59:59.000Z

    We obtain explicit expressions for the thermoelectric transport coefficients of a strongly coupled, planar medium in the presence of an orthogonal magnetic field and disorder. The computations are performed within the gauge/gravity framework, however we propose and argue for a possible universal relevance of the results relying on comparisons and extensions of previous hydrodynamical analyses and experimental data.

  13. Tailoring the Thermoelectric Behavior of Electrically Conductive Polymer Composites

    E-Print Network [OSTI]

    Moriarty, Gregory P.

    2013-05-21T23:59:59.000Z

    the promise of fully organic composites as thermoelectric materials. This combination of CNT and stabilizer produced metallic electrical conductivity (200,000 S m-1) and power factors (S2?) within an order of magnitude of commonly used semiconductors (~400 ?W...

  14. Universal formulae for thermoelectric transport with magnetic field and disorder

    E-Print Network [OSTI]

    Amoretti, Andrea

    2015-01-01T23:59:59.000Z

    We obtain explicit expressions for the thermoelectric transport coefficients of a strongly coupled, planar medium in the presence of an orthogonal magnetic field and disorder. The computations are performed within the gauge/gravity framework, however we propose and argue for a possible universal relevance of the results relying on comparisons and extensions of previous hydrodynamical analyses and experimental data.

  15. Semiconducting glasses: A new class of thermoelectric materials?

    SciTech Connect (OSTI)

    Goncalves, A.P., E-mail: apg@itn.pt [Instituto Tecnologico e Nuclear, Instituto Superior Tecnico, Universidade Tecnica de Lisboa/CFMC-UL, P-2686-953 Sacavem (Portugal); Lopes, E.B. [Instituto Tecnologico e Nuclear, Instituto Superior Tecnico, Universidade Tecnica de Lisboa/CFMC-UL, P-2686-953 Sacavem (Portugal)] [Instituto Tecnologico e Nuclear, Instituto Superior Tecnico, Universidade Tecnica de Lisboa/CFMC-UL, P-2686-953 Sacavem (Portugal); Delaizir, G. [SPCTS, UMR CNRS 7315, Centre Europeen de la Ceramique, 12 rue Atlantis, 87068 Limoges (France)] [SPCTS, UMR CNRS 7315, Centre Europeen de la Ceramique, 12 rue Atlantis, 87068 Limoges (France); Vaney, J.B.; Lenoir, B. [Institut Jean Lamour, UMR 7198 CNRS-Nancy Universite-UPVM, Ecole Nationale Superieure des Mines de Nancy, Parc de Saurupt, F-54042 Nancy (France)] [Institut Jean Lamour, UMR 7198 CNRS-Nancy Universite-UPVM, Ecole Nationale Superieure des Mines de Nancy, Parc de Saurupt, F-54042 Nancy (France); Piarristeguy, A.; Pradel, A. [Institut Charles Gerhardt (ICG), UMR 5253 CNRS, Universite de Montpellier 2, 34095 Montpellier (France)] [Institut Charles Gerhardt (ICG), UMR 5253 CNRS, Universite de Montpellier 2, 34095 Montpellier (France); Monnier, J.; Ochin, P.; Godart, C. [CNRS, ICMPE, CMTR, 2/8 rue Henri Dunant, 94320 Thiais (France)] [CNRS, ICMPE, CMTR, 2/8 rue Henri Dunant, 94320 Thiais (France)

    2012-09-15T23:59:59.000Z

    The deeper understanding of the factors that affect the dimensionless figure of merit, ZT, and the use of new synthetic methods has recently led to the development of novel systems with improved thermoelectric performances. Albeit up to now with ZT values lower than the conventional bulk materials, semiconducting glasses have also emerged as a new family of potential thermoelectric materials. This paper reviews the latest advances on semiconducting glasses for thermoelectric applications. Key examples of tellurium-based glasses, with high Seebeck coefficients, very low thermal conductivities and tunable electrical conductivities, are presented. ZT values as high as 0.2 were obtained at room temperature for several tellurium-based glasses with high copper concentrations, confirming chalcogenide semiconducting glasses as good candidates for high-performance thermoelectric materials. However, the temperature stability and electrical conductivity of the reported glasses are still not good enough for practical applications and further studies are still needed to enhance them. - Graphical abstract: Power factor as a function of the temperature for the Cu{sub 27.5}Ge{sub 2.5}Te{sub 70} and Cu{sub 30}As{sub 15}Te{sub 55} seniconducting glasses. Highlights: Black-Right-Pointing-Pointer A review of semiconducting glasses for thermoelectrics applications is presented. Black-Right-Pointing-Pointer The studied semiconducting glasses present very low thermal conductivities. Black-Right-Pointing-Pointer Composition can tune electrical conductivity and Seebeck coefficient. Black-Right-Pointing-Pointer ZT=0.2 is obtained at 300 K for different semiconducting glasses.

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

    E-Print Network [OSTI]

    Liu, Liping

    2012-01-01T23:59:59.000Z

    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.

  17. Searching for new thermoelectrics in chemically and structurally complex bismuth chalcogenides

    SciTech Connect (OSTI)

    Chung, D.Y.; Hogan, T.; Schindler, J.; Iordanidis, L.; Brazis, P.; Kannewurf, C.R.; Chen, B.; Uher, C.; Kanatzidis, M.G.

    1997-07-01T23:59:59.000Z

    A solid state chemistry synthetic approach towards identifying new materials with potentially superior thermoelectric properties is presented. Materials with complex compositions and structures also have complex electronic structures which may give rise to high thermoelectric powers and at the same time possess low thermal conductivities. The structures and thermoelectric properties of several new promising compounds with K-Bi-Se, K-Bi-S, Ba-Bi-Te, Cs-Bi-Te, and Rb-bi-Te are reported.

  18. Advanced thermoelectric materials and systems for automotive applications in the next millennium

    SciTech Connect (OSTI)

    Morelli, D.T.

    1997-07-01T23:59:59.000Z

    A combination of environmental, economic, and technological drivers has led to a reassessment of the potential for using thermoelectric devices in several automotive applications. In order for this technology to achieve its ultimate potential, new materials with enhanced thermoelectric properties are required. Experimental results on the fundamental physical properties of some new thermoelectric materials, including filled skutterudites and 1-1-1 intermetallic semiconductors, are presented.

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

    DOE Patents [OSTI]

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

    1980-05-27T23:59:59.000Z

    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)

  20. The Effect of Processing Parameters on the Thermoelectric Properties of Magnesium Silicide

    E-Print Network [OSTI]

    Fong, Anthony

    2012-01-01T23:59:59.000Z

    W. Engelmann. J. C. A. Peltier, “Nouvelles expériences surmaterials: the Seebeck, Peltier, and Thomson effects. Theof thermoelectrics is called the Peltier effect named after

  1. Band structure engineering through orbital interaction for enhanced thermoelectric power factor

    E-Print Network [OSTI]

    Zhu, Hong

    Band structure engineering for specific electronic or optical properties is essential for the further development of many important technologies including thermoelectrics, optoelectronics, and microelectronics. In this ...

  2. CsBi4Te6: A High-Performance Thermoelectric Material for Low...

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

    M. Bastea, C. Uher, M. Kanatzidis Year: 2000 Abstract: Thermoelectric (Peltier) heat pumps are capable of refrigerating solid or fluid objects, and unlike conventional...

  3. Standardization of Transport Properties Measurements: Internal Energy Agency (IEA-AMT) Annex on Thermoelectric

    Broader source: Energy.gov [DOE]

    Thermoelectric materials transport properties measurements improvement and standardization is undertaken by new IEA annex under the Advanced Materials for Transportation implementing agreement

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

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

    Truck The Effects of an Exhaust Thermoelectric Generator of a GM Sierra Pickup Truck 2004 Diesel Engine Emissions Reduction (DEER) Conference Presentation: Hi-Z Technology Inc. and...

  5. 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

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

    E-Print Network [OSTI]

    Hasan, Atiya

    2007-01-01T23:59:59.000Z

    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. ...

  7. An on-line information system for radioisotope thermal generator production

    SciTech Connect (OSTI)

    Kiebel, G.R.; Wiemers, M.J. (Westinghouse Hanford Company, P.O. Box 1970, Mail Stop N1-42, Richland, Washington 99352 (US))

    1991-01-01T23:59:59.000Z

    An on-line production information system has been designed to support radioisotope thermal generator assembly and testing in a new facility being built at the Department of Energy Hanford Site in Washington State. This system is intended to make handling the large volumes of information associated with radioisotope thermal generator production and certification more efficient with less opportunity for error than traditional paper methods. It provides for tracking materials, implementing work procedures directly from computer terminals, and cross referencing among materials, procedures, and other documents related to production. This system will be implemented on a network of microcomputers using UNIX{sup TM} for its operating system. It has been designed to allow increased capabilities to be added as operating experience with the new facility dictates.

  8. Recovery of radioisotopes from nuclear waste for radio-scintillator-luminescence energy applications

    E-Print Network [OSTI]

    Alfred Bennun

    2012-08-16T23:59:59.000Z

    Extraction of the light weight radioisotopes (LWR) 89Sr/90Sr, from the expended nuclear bars in the Fukushima reactor, should have decreased the extent of contamination during the course of the accident. 89Sr applications could pay for the extraction of 89Sr/90Sr from nuclear residues. Added value could be obtained by using 89Sr for cancer treatments. Known technologies could be used to relate into innovative ways LWR, to obtain nuclear energy at battery scale. LWR interact by contact with scintillators converting \\beta-radiation into light-energy. This would lead to manufacturing scintillator lamps which operate independently of other source of energy. These lamps could be used to generate photoelectric energy. Engineering of radioisotopes scintillator photovoltaic cells, would lead to devices without moving parts.

  9. Recovery of radioisotopes from nuclear waste for radio-scintillator-luminescence energy applications

    E-Print Network [OSTI]

    Bennun, Alfred

    2012-01-01T23:59:59.000Z

    Extraction of the light weight radioisotopes (LWR) 89Sr/90Sr, from the expended nuclear bars in the Fukushima reactor, should have decreased the extent of contamination during the course of the accident. 89Sr applications could pay for the extraction of 89Sr/90Sr from nuclear residues. Added value could be obtained by using 89Sr for cancer treatments. Known technologies could be used to relate into innovative ways LWR, to obtain nuclear energy at battery scale. LWR interact by contact with scintillators converting \\beta-radiation into light-energy. This would lead to manufacturing scintillator lamps which operate independently of other source of energy. These lamps could be used to generate photoelectric energy. Engineering of radioisotopes scintillator photovoltaic cells, would lead to devices without moving parts.

  10. Thermoelectric Conductivities at Finite Magnetic Field and the Nernst Effect

    E-Print Network [OSTI]

    Keun-Young Kim; Kyung Kiu Kim; Yunseok Seo; Sang-Jin Sin

    2015-03-17T23:59:59.000Z

    We study electric, thermoelectric, and thermal conductivities of a strongly correlated system in the presence of magnetic field by gauge/gravity duality. We consider a general class of Einstein-Maxwell-Dilaton theory with axion fields imposing momentum relaxation. Analytic general formulas for DC conductivities and the Nernst signal are derived in terms of the black hole horizon data. For an explicit model study we analyse in detail the dyonic black hole modified by momentum relaxation. In this model, the Nernst signal shows a typical vortex-liquid effect when momentum relaxation effect is comparable to chemical potential. We compute all AC electric, thermoelectric, and thermal conductivities by numerical analysis and confirms that their zero frequency limits precisely reproduce our analytic formulas, which is a non-trivial consistency check of our methods. We discuss the momentum relaxation effect on conductivities including cyclotron resonance poles.

  11. A linear nonequilibrium thermodynamics approach to optimization of thermoelectric devices

    E-Print Network [OSTI]

    Ouerdane, H; Apertet, Y; Michot, A; Abbout, A

    2013-01-01T23:59:59.000Z

    Improvement of thermoelectric systems in terms of performance and range of applications relies on progress in materials science and optimization of device operation. In this chapter, we focuse on optimization by taking into account the interaction of the system with its environment. For this purpose, we consider the illustrative case of a thermoelectric generator coupled to two temperature baths via heat exchangers characterized by a thermal resistance, and we analyze its working conditions. Our main message is that both electrical and thermal impedance matching conditions must be met for optimal device performance. Our analysis is fundamentally based on linear nonequilibrium thermodynamics using the force-flux formalism. An outlook on mesoscopic systems is also given.

  12. Optimal working conditions for thermoelectric generators with realistic thermal coupling

    E-Print Network [OSTI]

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

    2011-01-01T23:59:59.000Z

    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...

  13. Thermoelectric Properties of Scaled Silicon Nanowires Using the s*-SO Atomistic Tight-Binding Model and Boltzmann

    E-Print Network [OSTI]

    1 Thermoelectric Properties of Scaled Silicon Nanowires Using the sp3 d5 s*-SO Atomistic Tight|kosina}@iue.tuwien.ac.at Abstract As a result of suppressed phonon conduction, large improvements of the thermoelectric figure, the Seebeck coefficient, and the thermoelectric power factor. We examine n-type nanowires of diameters of 3nm

  14. Thermoelectric and micro-Raman measurements of carrier density and mobility in heavily Si-doped GaN wires

    E-Print Network [OSTI]

    Boyer, Edmond

    Thermoelectric and micro-Raman measurements of carrier density and mobility in heavily Si-doped Ga (Received 19 July 2013; accepted 28 October 2013; published online 11 November 2013) Combined thermoelectric epitaxy (MOVPE). These highly conductive Si-doped GaN wires were studied by means of thermoelectrical

  15. 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 high-resolution thermal images of the electrical contacts inside an active thermoelectric micromodule-scale thermoelectric modules. By determining localized sources of Joule heating, one can identify manufacturing errors

  16. Enhancing the Thermoelectric Power Factor with Highly Mismatched Isoelectronic Doping Joo-Hyoung Lee,1,4

    E-Print Network [OSTI]

    Wu, Junqiao

    Enhancing the Thermoelectric Power Factor with Highly Mismatched Isoelectronic Doping Joo; published 8 January 2010) We investigate the effect of O impurities on the thermoelectric properties of Zn performance thermoelectric applications. DOI: 10.1103/PhysRevLett.104.016602 PACS numbers: 72.20.Pa, 71.15.Àm

  17. High temperature thermoelectric properties of Czochralski-pulled Ba8Ga16Ge30 M. Christensen1

    E-Print Network [OSTI]

    High temperature thermoelectric properties of Czochralski-pulled Ba8Ga16Ge30 M. Christensen1 , G, Pasadena, California 91125 Abstract High temperature thermoelectric properties have been measured/m-K around 900K, and ZT reaches a maximum of 0.9 at 1000 K. Introduction The interest in thermoelectric

  18. Modulation of Thermoelectric Power of Individual Carbon Nanotubes Joshua P. Small, Kerstin M. Perez, and Philip Kim

    E-Print Network [OSTI]

    Kim, Philip

    Modulation of Thermoelectric Power of Individual Carbon Nanotubes Joshua P. Small, Kerstin M. Perez 2003; published 18 December 2003) Thermoelectric power (TEP) of individual single walled carbon.256801 PACS numbers: 73.63.­b, 65.80.+n, 73.22.­f Enhanced thermoelectric phenomena in nanoscaled materials

  19. Thermoelectric properties of lattice-matched AlInN alloy grown by metal organic chemical vapor deposition

    E-Print Network [OSTI]

    Gilchrist, James F.

    Thermoelectric properties of lattice-matched AlInN alloy grown by metal organic chemical vapor Seebeck coefficient and resistance measurement system for thermoelectric materials in the thin disk geometry Rev. Sci. Instrum. 83, 025101 (2012) High-temperature thermoelectric properties of Cu1­xInTe2

  20. Quantum modeling of thermoelectric performance of strained Si/Ge/Si superlattices using the nonequilibrium Green's function method

    E-Print Network [OSTI]

    Walker, D. Greg

    Quantum modeling of thermoelectric performance of strained Si/Ge/Si superlattices using 2007 The cross-plane thermoelectric performance of strained Si/Ge/Si superlattices is studied from such that thermoelectric performance is independent of layer thickness between 2 and 4 nm germanium barrier layers