National Library of Energy BETA

Sample records for distributed thermoelectric heating

  1. Thermoelectric heat exchange element

    DOE Patents [OSTI]

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

    2007-08-14

    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.

  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. 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...

  4. Enhancing Heat Recovery for Thermoelectric Devices | Department...

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

    Heat Recovery for Thermoelectric Devices Enhancing Heat Recovery for Thermoelectric Devices Presentation given at the 16th Directions in Engine-Efficiency and Emissions Research...

  5. Energy Efficient HVAC System for Distributed Cooling/Heating...

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

    Efficient HVAC System for Distributed CoolingHeating with Thermoelectric Devices Energy Efficient HVAC System for Distributed CoolingHeating with Thermoelectric Devices 2012 DOE...

  6. 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...

  7. 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...

  8. Thermoelectric Technology for Automotive Waste Heat Recovery...

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

    Technology for Automotive Waste Heat Recovery Thermoelectric Technology for Automotive Waste Heat Recovery Presentation given at the 2007 Diesel Engine-Efficiency & Emissions...

  9. 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...

  10. 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...

  11. 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...

  12. 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...

  13. 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...

  14. 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...

  15. Develop Thermoelectric Technology for Automotive Waste Heat Recovery

    Broader source: Energy.gov [DOE]

    Develop thermoelectric technology for waste heat recovery with a 10% fuel economy improvement without increasing emissions.

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

    Office of Environmental Management (EM)

    Documents & Publications TEG On-Vehicle Performance & Model Validation Thermoelectric Generator Performance for Passenger Vehicles Thermoelectric Waste Heat Recovery Program for...

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

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

    ace45yang.pdf More Documents & Publications Develop Thermoelectric Technology for Automotive Waste Heat Recovery Engineering and Materials for Automotive Thermoelectric...

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

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

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

  19. Heat Management in Thermoelectric Power Generators

    E-Print Network [OSTI]

    Zebarjadi, Mona

    2015-01-01

    Thermoelectric power generators are used to convert heat into electricity. Like any other heat engine, the performance of a thermoelectric generator increases as the temperature difference on the sides increases. It is generally assumed that as more heat is forced through the thermoelectric legs, their performance increases. Therefore, insulations are typically used to minimize the heat losses and to confine the heat transport through the thermoelectric legs. In this paper we show that to some extend it is beneficial to purposely open heat loss channels in order to establish a larger temperature gradient and therefore to increase the overall efficiency and achieve larger electric power output. We define a modified Biot number (Bi) as an indicator of requirements for sidewall insulation. We show that if Bi1, it lowers the conversion efficiency.

  20. 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...

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

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

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

  2. 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...

  3. 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

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

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

    Opportunities and Challenges of Thermoelectrlic Waste Heat Recovery in the Automotive Industry On Thermoelectric Properties of p-Type Skutterudites Development of...

  5. Development of Thermoelectric Technology for Automotive Waste Heat Recovery

    Broader source: Energy.gov [DOE]

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

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

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

    unit in an over-the-road truck system. schock.pdf More Documents & Publications Thermoelectric Conversion of Wate Heat to Electricity in an IC Engine Powered Vehicle...

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

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

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

  8. 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...

  9. 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...

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

    Broader source: Energy.gov [DOE]

    Model developed provides effective guidelines to designing thermoelectric generation systems for automotive waste heat recovery applications

  11. Improving Energy Efficiency by Developing Components for Distributed Cooling and Heating Based on Thermal Comfort Modeling[Thermoelectric (TE) HVAC

    Broader source: Energy.gov [DOE]

    Discusses results from TE HVAC project to add detail to a human thermal comfort model and further allow load reduction in the climate control energy through a distributed TE network

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

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

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

  13. 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 telluride TEMs. Key words: Thermoelectric generators, waste heat recovery, automotive exhaust, skutterudites

  14. 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...

  15. Thermoelectricity without absorbing energy from the heat sources

    E-Print Network [OSTI]

    Robert. S. Whitney; Rafael Sánchez; Federica Haupt; Janine Splettstoesser

    2015-09-28

    We analyze the power output of a quantum dot machine coupled to two electronic reservoirs via thermoelectric contacts, and to two thermal reservoirs - one hot and one cold. This machine is a nanoscale analogue of a conventional thermocouple heat-engine, in which the active region being heated is unavoidably also exchanging heat with its cold environment. Heat exchange between the dot and the thermal reservoirs is treated as a capacitive coupling to electronic fluctuations in localized levels, modeled as two additional quantum dots. The resulting multiple-dot setup is described using a master equation approach. We observe an "exotic" power generation, which remains finite even when the heat absorbed from the thermal reservoirs is zero (in other words the heat coming from the hot reservoir all escapes into the cold environment). This effect can be understood in terms of a non-local effect in which the heat flow from heat source to the cold environment generates power via a mechanism which we refer to as Coulomb heat drag. It relies on the fact that there is no relaxation in the quantum dot system, so electrons within it have a non-thermal energy distribution. More poetically, one can say that we find a spatial separation of the first-law of thermodynamics (heat to work conversion) from the second-law of thermodynamics (generation of entropy). We present circumstances in which this non-thermal system can generate more power than any conventional macroscopic thermocouple (with local thermalization), even when the latter works with Carnot efficiency.

  16. Thermoelectricity without absorbing energy from the heat sources

    E-Print Network [OSTI]

    Robert. S. Whitney; Rafael Sánchez; Federica Haupt; Janine Splettstoesser

    2015-08-18

    We analyze the power output of a quantum dot machine coupled to two electronic reservoirs via thermoelectric contacts, and to two thermal reservoirs - one hot and one cold. This machine is a nanoscale analogue of a conventional thermocouple heat-engine, in which the active region being heated is unavoidably also exchanging heat with its cold environment. Heat exchange between the dot and the thermal reservoirs is treated as a capacitive coupling to electronic fluctuations in localized levels, modeled as two additional quantum dots. The resulting multiple-dot setup is described using a master equation approach. We observe an "exotic" power generation, which remains finite even when the heat absorbed from the thermal reservoirs is zero (in other words the heat coming from the hot reservoir all escapes into the cold environment). This effect can be understood in terms of a non-local effect in which the heat flow from heat source to the cold environment generates power via a mechanism which we refer to as Coulomb heat drag. It relies on the fact that there is no relaxation in the quantum dot system, so electrons within it have a non-thermal energy distribution. More poetically, one can say that we find a spatial separation of the first-law of thermodynamics (heat to work conversion) from the second-law of thermodynamics (generation of entropy). We present circumstances in which this non-thermal system can generate more power than any conventional macroscopic thermocouple (with local thermalization), even when the latter works with Carnot efficiency.

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

    Broader source: Energy.gov [DOE]

    Developing a low and high temperature dual thermoelectric generation waste heat recovery system for light-duty vehicles.

  18. 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 ...

  19. 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

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

    Office of Energy Efficiency and Renewable Energy (EERE)

    Development of high-performance thermoelectric devices for vehicle waste heat recovery will include fundamental research to use abundant promising low-cost thermoelectric materials, thermal management and interfaces design, and metrology

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

    Broader source: Energy.gov [DOE]

    Progress in reliable high temperature segmented thermoelectric devices and potential for producing electricity from waste heat from energy intensive industrial processes and transportation vehicles exhaust are discussed

  2. Aalborg Universitet HT-PEM Fuel Cell System with Integrated Thermoelectric Exhaust Heat Recovery

    E-Print Network [OSTI]

    Berning, Torsten

    Aalborg Universitet HT-PEM Fuel Cell System with Integrated Thermoelectric Exhaust Heat Recovery-PEM Fuel Cell System with Integrated Thermoelectric Exhaust Heat Recovery. Department of Energy Technology Heat Recovery Xin Gao Dissertation submitted to the Faculty of Engineering and Science at Aalborg

  3. Feasibility of Thermoelectrics for Waste Heat Recovery in Conventional Vehicles

    SciTech Connect (OSTI)

    Smith, K.; Thornton, M.

    2009-04-01

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

  4. Enhancement of automotive exhaust heat recovery by thermoelectric...

    Office of Scientific and Technical Information (OSTI)

    thermoelectric power output were examined. The results indicate that thermoelectric power production is increased at higher gas inlet temperature or flow rate. However,...

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

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

    in an Over the Road Diesel Powered Engine System by the Application of Advanced Thermoelectric Systems Implemented in a Hybrid Configuration Thermoelectric Conversion of Waste...

  6. Advanced Thermoelectric Materials for Efficient Waste Heat Recovery in Process Industries

    SciTech Connect (OSTI)

    Adam Polcyn; Moe Khaleel

    2009-01-06

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

  7. Vehicular Applications of Thermoelectrics | Department of Energy

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

    Vehicular Applications of Thermoelectrics Overivew of DOE projects developing thermoelectric generators for engine waste heat utilization and vehiclular thermoelectric...

  8. Waste Heat Recovery Opportunities for Thermoelectric Generators |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousMathematics And Statistics » USAJobs SearchAMERICA'S FUTURE. regulators02-03Heat Management

  9. Transient cooling and heating via a bismuth-telluride thermoelectric device 

    E-Print Network [OSTI]

    Clancy, Terry L

    1998-01-01

    Thermoelectric cooling or heating can be used to drive materials to specified temperatures. By way of the Peltier effect, heat is liberated or absorbed when a current flows across a 'unction of two dissimilar conductors. A time history...

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

    E-Print Network [OSTI]

    Latcham, Jacob G. (Jacob Greco)

    2009-01-01

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

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

    DOE Patents [OSTI]

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

    1980-05-27

    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)

  12. Thermoelectric generators as self-oscillating heat engines

    E-Print Network [OSTI]

    Robert Alicki

    2015-05-30

    In the previous paper of Alicki et.al. a model of a solar cell has been proposed in which the non-periodic source of energy - photon flux - drives the collective periodic motion of electrons in a form of plasma oscillations. Subsequently, plasma oscillations are rectified by the p-n junction diode into the direct current (work). This approach makes a solar cell similar to standard macroscopic heat motors or turbines which always contain two heat baths, the working medium and the periodically moving piston or rotor. Here, a very similar model is proposed in order to describe the operation principles of thermoelectric generators based either on bimetallic or semiconductor p-n junctions. Again plasma oscillation corresponds to a piston and sunlight is replaced by a hot bath. The mathematical formalism is based on the Markovian master equations which can be derived in a rigorous way from the underlying Hamiltonian models and are consistent with the laws of thermodynamics.

  13. ON THE ROLE OF THERMOELECTRIC HEAT TRANSFER IN THE DESIGN OF SMA ACTUATORS: THEORETICAL MODELING AND EXPERIMENT

    E-Print Network [OSTI]

    ON THE ROLE OF THERMOELECTRIC HEAT TRANSFER IN THE DESIGN OF SMA ACTUATORS: THEORETICAL MODELING theoretical/experimentalstudy of the heat transferin thermoelectricShape Memory Alloy (SMA) actuators is undertaken in this paper. A one-dimensional model of a thermoelectric unit cell with a SMA junction

  14. Separation of heat and charge currents for boosted thermoelectric conversion

    E-Print Network [OSTI]

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

    2015-07-01

    In a multi-terminal device the (electronic) heat and charge currents can follow different paths. In this paper we introduce and analyse a class of multi-terminal devices where this property is pushed to its extreme limits, with charge $and$ heat currents flowing in different reservoirs. After introducing the main characteristics of such $heat-charge$ $current$ $separation$ regime we show how to realise it in a multi-terminal device with normal and superconducting leads. We demonstrate that this regime allows to control independently heat and charge flows and to greatly enhance thermoelectric performances at low temperatures. We analyse in details a three-terminal setup involving a superconducting lead, a normal lead and a voltage probe. For a generic scattering region we show that in the regime of heat-charge current separation both the power factor and the figure of merit $ZT$ are highly increased with respect to a standard two-terminal system. These results are confirmed for the specific case of a system consisting of three coupled quantum dots.

  15. Improving Energy Efficiency by Developing Components for Distributed...

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

    Modeling Thermoelectric (TE) HVAC Improving Energy Efficiency by Developing Components for Distributed Cooling and Heating Based on Thermal Comfort Modeling Thermoelectric (TE)...

  16. Improving Energy Efficiency by Developing Components for Distributed...

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

    Thermoelectric (TE) HVAC Improving Energy Efficiency by Developing Components for Distributed Cooling and Heating Based on Thermal Comfort Modeling Thermoelectric (TE) HVAC...

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

    Broader source: Energy.gov [DOE]

    Presentation given by GenTherm at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about thermoelectric waste heat recovery...

  18. 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...

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

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

    deer09yang2.pdf More Documents & Publications Engineering and Materials for Automotive Thermoelectric Applications Electrical and Thermal Transport Optimization of High...

  20. 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

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

    DOE Patents [OSTI]

    Meisner, Gregory P; Yang, Jihui

    2014-02-11

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

  2. 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...

  3. 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.

  4. Distributed Generation with Heat Recovery and Storage

    E-Print Network [OSTI]

    Siddiqui, Afzal S.; Marnay, Chris; Firestone, Ryan M.; Zhou, Nan

    2008-01-01

    Distributed Generation with Heat Recovery and Storage AfzalGeneration with Heat Recovery and Storage Manuscript Numberhere in order to focus on heat recovery and storage) utility

  5. Title: Optimal Design of Thermoelectric Generators for Low Grade Heat Recovery Developed by Dr. HoSung Lee on 12/15/2014

    E-Print Network [OSTI]

    Lee, Ho Sung

    Title: Optimal Design of Thermoelectric Generators for Low Grade Heat Recovery Developed by Dr. Ho- grade waste heat recovery with the present optimal design. We consider low grade heat recovery from

  6. Thermodynamics of Mesoscopic Thermoelectric Heat Engine beyond Linear-Response Regime

    E-Print Network [OSTI]

    Kaoru Yamamoto; Naomichi Hatano

    2015-10-06

    Mesoscopic thermoelectric heat engine is much anticipated as a new device which allows us to utilize with high efficiency wasted heat inaccessible by conventional heat engines. However, the derivation of the heat current in this engine seems to be either not general or described too briefly, even inappropriate in some cases. In this paper, we give a clear-cut derivation of the heat current of the engine with suitable assumptions beyond the linear-response regime. It resolves the confusion in the definition of the heat current in the linear-response regime. After verifying that we can construct the same formalism as that of the cyclic engine, we find the following two interesting results within the Landauer-B\\"uttiker formalism: the efficiency of the mesoscopic thermoelectric engine reaches the Carnot efficiency if and only if the transmission probability is finite at a specific energy and zero otherwise; the unitarity of the transmission probability guarantees the second law of thermodynamics, invalidating Benenti et al.'s argument in the linear-response regime that one could obtain a finite power with the Carnot efficiency under a broken time-reversal symmetry. These results demonstrate how quantum mechanics constraints thermodynamics.

  7. Thermodynamics of the mesoscopic thermoelectric heat engine beyond the linear-response regime

    E-Print Network [OSTI]

    Kaoru Yamamoto; Naomichi Hatano

    2015-11-22

    Mesoscopic thermoelectric heat engine is much anticipated as a device that allows us to utilize with high efficiency wasted heat inaccessible by conventional heat engines. However, the derivation of the heat current in this engine seems to be either not general or described too briefly, even inappropriate in some cases. In this paper, we give a clear-cut derivation of the heat current of the engine with suitable assumptions beyond the linear-response regime. It resolves the confusion in the definition of the heat current in the linear-response regime. After verifying that we can construct the same formalism as that of the cyclic engine, we find the following two interesting results within the Landauer-B\\"uttiker formalism: the efficiency of the mesoscopic thermoelectric engine reaches the Carnot efficiency if and only if the transmission probability is finite at a specific energy and zero otherwise; the unitarity of the transmission probability guarantees the second law of thermodynamics, invalidating Benenti et al.'s argument in the linear-response regime that one could obtain a finite power with the Carnot efficiency under a broken time-reversal symmetry. These results demonstrate how quantum mechanics constraints thermodynamics.

  8. Heat distribution by natural convection

    SciTech Connect (OSTI)

    Balcomb, J.D.

    1985-01-01

    Natural convection can provide adequate heat distribution in many situtations that arise in buildings. This is appropriate, for example, in passive solar buildings where some rooms tend to be more strongly solar heated than others or to reduce the number of heating units required in a building. Natural airflow and heat transport through doorways and other internal building apertures is predictable and can be accounted for in the design. The nature of natural convection is described, and a design chart is presented appropriate to a simple, single-doorway situation. Natural convective loops that can occur in buildings are described and a few design guidelines are presented.

  9. Recovering Industrial Waste Heat by the Means of Thermoelectricity

    E-Print Network [OSTI]

    Kjelstrup, Signe

    . The purpose of the demonstration unit was to gen- erate electricity from energy dissipated as thermal. By method B, we calculated the heat flow from module thermal conductivity and temperature difference across this by two methods, A and B. In method A, the heat flow was estimated from cooling water volume flow

  10. Thermodynamics of Mesoscopic Thermoelectric Heat Engine beyond Linear-Response Regime

    E-Print Network [OSTI]

    Kaoru Yamamoto; Naomichi Hatano

    2015-07-06

    Mesoscopic thermoelectric heat engine is much anticipated as a new device which allows us to utilize wasted heat inaccessible by the conventional heat engine with high efficiency. Most theoretical studies so far, however, have been limited to the linear-response regime; its thermodynamics beyond the regime still remains unclear. In this Letter, we give a clear-cut definition of the heat current of the engine beyond the linear-response regime. It resolves the confusion in the definition of the heat current in the linear-response regime. After verifying its thermodynamic consistency, we find the following two interesting results: the efficiency of the mesoscopic thermoelectric engine reaches the Carnot efficiency if and only if the transmission function is a delta function at a specific energy; the unitarity of the scattering matrix guarantees the second law of thermodynamics, invalidating Benenti et al.'s argument in the linear-response regime that one could obtain a finite power with the Carnot efficiency under broken time-reversal symmetry.

  11. 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...

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

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

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

  13. 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...

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

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

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

  15. 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...

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

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

    Fabricated at MSU (40 Watts @ T 700C) FEA Model of 16 Leg Module 1 2 3 4 Example of Stress Distribution in 16 Leg Module (300K - 800K) 1 3 4 2 Performance Measures and...

  17. Heat distribution by natural convection

    SciTech Connect (OSTI)

    Balcomb, J.D.

    1985-01-01

    Natural convection can provide adequate heat distribution in many situations that arise in buildings. This is appropriate, for example, in passive solar buildings where some rooms tend to be more strongly solar heated than others. Natural convection can also be used to reduce the number of auxiliary heating units required in a building. Natural airflow and heat transport through doorways and other internal building apertures are predictable and can be accounted for in the design. The nature of natural convection is described, and a design chart is presented appropriate to a simple, single-doorway situation. Experimental results are summarized based on the monitoring of 15 passive solar buildings which employ a wide variety of geometrical configurations including natural convective loops.

  18. Heat Distribution Systems | Department of Energy

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

    Forced-air systems use ducts that can also be used for central air conditioning and heat pump systems. Radiant heating systems also have unique heat distribution systems. That...

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

    SciTech Connect (OSTI)

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

    1991-09-01

    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.

  20. 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...

  1. 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...

  2. 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...

  3. Lighting system with heat distribution face plate

    DOE Patents [OSTI]

    Arik, Mehmet; Weaver, Stanton Earl; Stecher, Thomas Elliot; Kuenzler, Glenn Howard; Wolfe, Jr., Charles Franklin; Li, Ri

    2013-09-10

    Lighting systems having a light source and a thermal management system are provided. The thermal management system includes synthetic jet devices, a heat sink and a heat distribution face plate. The synthetic jet devices are arranged in parallel to one and other and are configured to actively cool the lighting system. The heat distribution face plate is configured to radially transfer heat from the light source into the ambient air.

  4. Heat distribution ceramic processing method

    DOE Patents [OSTI]

    Tiegs, Terry N. (Lenoir City, TN); Kiggans, Jr., James O. (Oak Ridge, TN)

    2001-01-01

    A multi-layered heat distributor system is provided for use in a microwave process. The multi-layered heat distributors includes a first inner layer of a high thermal conductivity heat distributor material, a middle insulating layer and an optional third insulating outer layer. The multi-layered heat distributor system is placed around the ceramic composition or article to be processed and located in a microwave heating system. Sufficient microwave energy is applied to provide a high density, unflawed ceramic product.

  5. 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...

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

    SciTech Connect (OSTI)

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

    2010-09-01

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

  7. Thermoelectric energy conversion The objective of this laboratory is for you to explore the physics and practical aspects of solidsate heat

    E-Print Network [OSTI]

    Braun, Paul

    of some type. For example, heat generated by burning coal is used to vaporize water that drives of the thermoelectric materials is quadratic in the current. You will want to use the fandriven heat exchanger to #12 the physics and practical aspects of solidsate heat pumps, the direct conversion of thermaltoelectrical

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

    SciTech Connect (OSTI)

    2012-01-31

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

  9. Materials Growth and Characterization of Thermoelectric and Resistive Switching Devices

    E-Print Network [OSTI]

    Norris, Kate Jeanne

    2015-01-01

    SPIE 8467, Nanoepitaxy: Materials and Devices IV (2012)non-toxic thermoelectric material for waste heat recovery,”dot superlattice thermoelectric materials and devices. ,”

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

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

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

  11. 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...

  12. 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...

  13. 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...

  14. ITP Industrial Distributed Energy: Combined Heat and Power: Effective...

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

    ITP Industrial Distributed Energy: Combined Heat and Power: Effective Energy Solutions for a Sustainable Future ITP Industrial Distributed Energy: Combined Heat and Power:...

  15. ITP Industrial Distributed Energy: Combined Heat and Power -...

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

    ITP Industrial Distributed Energy: Combined Heat and Power - A Decade of Progress, A Vision for the Future ITP Industrial Distributed Energy: Combined Heat and Power - A Decade of...

  16. Survey of Emissions Models for Distributed Combined Heat and...

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

    Survey of Emissions Models for Distributed Combined Heat and Power Systems, 2007 Survey of Emissions Models for Distributed Combined Heat and Power Systems, 2007 The models...

  17. Improvements to solar thermoelectric generators through device design

    E-Print Network [OSTI]

    Weinstein, Lee A. (Lee Adragon)

    2013-01-01

    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 ...

  18. Project Profile: Concentrated Solar Thermoelectric Power

    Broader source: Energy.gov [DOE]

    The Rohsenow-Kendall Heat Transfer Lab at Massachusetts Institute of Technology(MIT), under the 2012 SunShot Concentrating Solar Power (CSP) R&D FOA, is developing concentrated solar thermoelectric generators (CSTEGs) for CSP systems. This innovative distributed solution contains no moving parts and converts heat directly into electricity. Thermal storage can be integrated into the system, creating a reliable and flexible source of electricity.

  19. Title: Optimal Design of a Thermoelectric Cooling/Heating for Car Seat Comfort Developed by Dr. HoSung Lee on 10/18/2014

    E-Print Network [OSTI]

    Lee, Ho Sung

    1 Title: Optimal Design of a Thermoelectric Cooling/Heating for Car Seat Comfort Developed by Dr. HoSung Lee on 10/18/2014 Car seat comfort is becoming more and more a competitive issue, moving optional to standard vehicle equipment. From early 1960s, it was shown that aerated car seats improved

  20. Bipolar thermoelectric devices

    E-Print Network [OSTI]

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

    2004-01-01

    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 ...

  1. Comfort-constrained distributed heat pump management

    E-Print Network [OSTI]

    Parkinson, Simon; Crawford, Curran; Djilali, Ned

    2011-01-01

    This paper introduces the design of a demand response network control strategy aimed at thermostatically controlled electric heating and cooling systems in buildings. The method relies on the use of programmable communicating thermostats, which are able to provide important component-level state variables to a system-level central controller. This information can be used to build power density distribution functions for the aggregate heat pump load. These functions lay out the fundamental basis for the methodology by allowing for consideration of customer-level constraints within the system-level decision making process. The proposed strategy is then implemented in a computational model to simulate a distribution of buildings, where the aggregate heat pump load is managed to provide the regulation services needed to successfully integrate wind power generators. Increased exploitation of wind resources will place similarly themed ancillary services in high-demand, traditionally provided by dispatchable energy ...

  2. Thermoelectric device characterization and solar thermoelectric system modeling

    E-Print Network [OSTI]

    Muto, Andrew (Andrew Jerome)

    2011-01-01

    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 ...

  3. 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...

  4. 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)

    2011-07-01

    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)

  5. Modeling of solar thermal selective surfaces and thermoelectric generators

    E-Print Network [OSTI]

    McEnaney, Kenneth

    2010-01-01

    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 ...

  6. White Paper for U.S. Army Rapid Equipping Force: Waste Heat Recovery with Thermoelectric and Lithium-Ion Hybrid Power System

    SciTech Connect (OSTI)

    Farmer, J C

    2007-11-26

    By harvesting waste heat from engine exhaust and storing it in light-weight high-capacity modules, it is believed that the need for energy transport by convoys can be lowered significantly. By storing this power during operation, substantial electrical power can be provided during long periods of silent operation, while the engines are not operating. It is proposed to investigate the potential of installing efficient thermoelectric generators on the exhaust systems of trucks and other vehicles to generate electrical power from the waste heat contained in the exhaust and to store that power in advanced power packs comprised of polymer-gel lithium ion batteries. Efficient inexpensive methods for production of the thermoelectric generator are also proposed. The technology that exists at LLNL, as well as that which exists at industrial partners, all have high technology readiness level (TRL). Work is needed for integration and deployment.

  7. Distributed Generation with Heat Recovery and Storage

    E-Print Network [OSTI]

    Siddiqui, Afzal; Marnay, Chris; Firestone, Ryan M.; Zhou, Nan

    2005-01-01

    Generation with Heat Recovery and Storage ‡ Afzal Sgeneration unit with heat recovery for space and watergeneration unit with heat recovery for space and water

  8. 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

  9. Thermoelectric generator for motor vehicle

    DOE Patents [OSTI]

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

    1997-04-29

    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.

  10. Superconducting thermoelectric generator

    DOE Patents [OSTI]

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

    1994-01-01

    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.

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

    Office of Energy Efficiency and Renewable Energy (EERE)

    Overview of design, fabrication, integration, and test of working prototype TEG for engine waste heat recovery on Suburban test vehicle, and continuing investigation of skutterudite materials systems

  12. Powering Curiosity: Multi-Mission Radioisotope Thermoelectric...

    Office of Environmental Management (EM)

    of power is the radioisotope thermoelectric generator (RTG) - essentially a nuclear battery that reliably converts heat into electricity. The Department of Energy and NASA...

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

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

    spraying of thermoelectric materials and other functional layers directly onto automotive exhaust pipes with enhanced performance, durability, and heat transfer zuo.pdf More...

  14. High-Temperature Thermoelectric Materials Characterization for...

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

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

  15. High Temperature Thermoelectric Materials Characterization for...

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

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

  16. Distributed Generation with Heat Recovery and Storage

    E-Print Network [OSTI]

    Siddiqui, Afzal S.; Marnay, Chris; Firestone, Ryan M.; Zhou, Nan

    2008-01-01

    power generation with combined heat and power applications,”of carbon tax on combined heat and power adoption by a131(1), 2-25. US Combined Heat and Power Association (

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

    E-Print Network [OSTI]

    Norwood, Zachary Mills

    2011-01-01

    Concentrating Solar Combined Heat and Power Systemfor Distributed Concentrating Solar Combined Heat and Powerof solar combined heat and power systems . . . . . . .

  18. Distributed Generation with Heat Recovery and Storage

    E-Print Network [OSTI]

    Siddiqui, Afzal S.; Marnay, Chris; Firestone, Ryan M.; Zhou, Nan

    2008-01-01

    distributed energy resource technology characterizations, National Renewable EnergyEfficiency and Renewable Energy, Office of Distributed

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

    E-Print Network [OSTI]

    Minnich, Austin (Austin Jerome)

    2008-01-01

    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, ...

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

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

    Research Laboratory Army interests in thermoelectrics include integrated TE-hand-held burners for battery-replacement, waste-heat recovery on vehicles, heat-powered mobile units,...

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

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

    Waste Heat Recovery Applications Progress in reliable high temperature segmented thermoelectric devices and potential for producing electricity from waste heat from energy...

  2. The effect of nonuniform axial heat flux distribution on the critical heat flux

    E-Print Network [OSTI]

    Todreas, Neil E.

    1965-01-01

    A systematic experimental and analytic investigation of the effect of nonuniform axial heat flux distribution on critical heat rilux was performed with water in the quality condition. Utilizing a model which ascribes the ...

  3. Heat Distribution Systems | Department of Energy

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

    heat arriving in the radiators. As a result, steam systems make it difficult to implement control strategies such as a night setback system. The first central heating systems for...

  4. Industrial Distributed Energy: Combined Heat & Power

    Office of Energy Efficiency and Renewable Energy (EERE)

    Information about the Department of Energy’s Industrial Technologies Program and its Combined Heat and Power program.

  5. Distributed Generation with Heat Recovery and Storage

    E-Print Network [OSTI]

    Siddiqui, Afzal; Marnay, Chris; Firestone, Ryan M.; Zhou, Nan

    2005-01-01

    Carbon emissions rate from burning natural gas to meet heating and cooling loads (kg/kWh) Natural gas price

  6. Materials Physics for Thermoelectric and Related Energetic Applications

    E-Print Network [OSTI]

    Tang, Shuang, Ph. D. Massachusetts Institute of Technology

    2015-01-01

    Thermoelectrics study the direct inter-conversion between heat flow and electrical power, which has a wide range of applications including power generation and refrigeration. The performance of thermoelectricity generation ...

  7. Thermoelectric system for an engine

    DOE Patents [OSTI]

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

    2010-06-22

    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.

  8. Distributed Generation with Heat Recovery and Storage

    E-Print Network [OSTI]

    Siddiqui, Afzal S.; Marnay, Chris; Firestone, Ryan M.; Zhou, Nan

    2008-01-01

    tiles for thermal energy storage,” working paper, Colorado1991). Wallboard with latent heat storage for passive solarR. (2000). Thermal energy storage for space cooling, Pacific

  9. Distributed Generation with Heat Recovery and Storage

    E-Print Network [OSTI]

    Siddiqui, Afzal S.; Marnay, Chris; Firestone, Ryan M.; Zhou, Nan

    2008-01-01

    selection of on-site power generation with combined heat andTotal Electricity Generation Figure 13. Small MercantileWeekday Total Electricity Generation (No Storage Adoption

  10. Thermoelectric module

    DOE Patents [OSTI]

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

    1980-07-08

    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.

  11. Distributed Generation with Heat Recovery and Storage

    E-Print Network [OSTI]

    Siddiqui, Afzal S.; Marnay, Chris; Firestone, Ryan M.; Zhou, Nan

    2008-01-01

    Space-Heating Supply Hour Load (kW) Storage CHP NG Fig. 14Space-Heating Supply Load (kW) Storage Hour CHP NG Fig. 15Supply Load (kW) Storage CHP NG Hour Fig. 16 July Weekday

  12. Adaptive Distributed Parameter and Input Estimation in Plasma Tokamak Heat

    E-Print Network [OSTI]

    Boyer, Edmond

    . Keywords: Thermonuclear fusion, distributed parameter systems, input state and parameter estimation, adaptive infinite-dimensional estimation, Galerkin method 1. INTRODUCTION In a controlled thermonuclear fusion reactor, the plasma thermal diffusivity and heating energy play an important role

  13. 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

  14. 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...

  15. Thermoelectric generator cooling system and method of control

    DOE Patents [OSTI]

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

    2012-10-16

    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.

  16. 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

  17. Optimal Design of Thermoelectric Devices with Dimensional Analysis Mechanical and Aeronautical Engineering, Western Michigan University,

    E-Print Network [OSTI]

    Lee, Ho Sung

    1 Optimal Design of Thermoelectric Devices with Dimensional Analysis HoSung Lee Mechanical of thermoelectric devices (thermoelectric generator and cooler) in connection with heat sinks was developed using of the thermoelectric devices. Particularly, use of the convection conductance of a fluid in the denominators

  18. 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)

    2007-10-30

    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.

  19. Superconducting thermoelectric generator

    DOE Patents [OSTI]

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

    1996-01-01

    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.

  20. Superconducting thermoelectric generator

    DOE Patents [OSTI]

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

    1998-05-05

    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.

  1. Superconducting thermoelectric generator

    DOE Patents [OSTI]

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

    1998-01-01

    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.

  2. Thermoelectric power generator with intermediate loop

    DOE Patents [OSTI]

    Bell, Lon E; Crane, Douglas Todd

    2013-05-21

    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.

  3. Thermoelectric power generator with intermediate loop

    DOE Patents [OSTI]

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

    2009-10-27

    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.

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

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

    Waste Heat Power Generation Quantum Well Thermoelectrics and Waste Heat Recovery Scale Up of SiSi0.8GE0.2 and B4CB9C Superlattices for Harvesting of Waste Heat in Diesel Engines...

  5. Bulk dimensional nanocomposites for thermoelectric applications

    DOE Patents [OSTI]

    Nolas, George S

    2014-06-24

    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.

  6. Energy Efficient HVAC System for Distributed Cooling/Heating with Thermoelectric Devices

    Broader source: Energy.gov [DOE]

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

  7. High temperature thermoelectrics

    DOE Patents [OSTI]

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

    2014-09-23

    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.

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

    E-Print Network [OSTI]

    Norwood, Zachary Mills

    2011-01-01

    Concentrating Solar Combined Heat and Power Systemfor Distributed Concentrating Solar Combined Heat and Powerin parabolic trough solar power technology. Journal of Solar

  9. Thermoelectrics Partnership: High Performance Thermoelectric Waste Heat

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankADVANCEDInstallers/ContractorsPhotovoltaicsState ofSavings for Specific2 DOE HydrogenScalable Thermo-

  10. Thermo-electrically pumped semiconductor light emitting diodes

    E-Print Network [OSTI]

    Santhanam, Parthiban

    2014-01-01

    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. ...

  11. Heat Pipe Performance Enhancement with Binary Mixture Fluids that Exhibit Strong Concentration Marangoni Effects

    E-Print Network [OSTI]

    Armijo, Kenneth Miguel

    2011-01-01

    pipe energy generation devices. Thermo-electric evaluationpipe energy generation devices. Thermo-electric evaluationenergy for heating applications or thermal electric power generation [

  12. Optimal distribution of the internal null control for the one-dimensional heat equation

    E-Print Network [OSTI]

    Optimal distribution of the internal null control for the one-dimensional heat equation Arnaud M of the support of the internal null control of minimal L2 -norm for the 1-D heat equation. A measure constraint the problem of optimizing the distribution of the support of the distributed null control for the heat

  13. Scalable Routes to Efficient Thermoelectric Materials

    E-Print Network [OSTI]

    Feser, Joseph Patrick

    2010-01-01

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

  14. 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

  15. Thin Thermoelectric Generator System for Body Energy KRISHNA T. SETTALURI,1

    E-Print Network [OSTI]

    Ram, Rajeev J.

    Thin Thermoelectric Generator System for Body Energy Harvesting KRISHNA T. SETTALURI,1 HSINYI LO,1, MA 02139, USA. 2.--e-mail: katey@mit.edu Wearable thermoelectric generators (TEGs) harvest thermal transfer system as part of the overall thermoelectric (TE) system. In particular, the small heat transfer

  16. Reduction of heat capacity and phonon group velocity in silicon nanowires Christopher Marchbanks and Zhigang Wua)

    E-Print Network [OSTI]

    Wu, Zhigang

    Reduction of heat capacity and phonon group velocity in silicon nanowires Christopher Marchbanks distributions, resulting in an 15% to 23% reduction in heat capacity and an averaged decrease of 31% in acoustic thermoelectrics,10,11 photovoltaic cells,12,13 and light-emitting diodes.14 Nanowire structure and confinement

  17. Active region emission measure distributions and implications for nanoflare heating

    SciTech Connect (OSTI)

    Cargill, P. J., E-mail: p.cargill@imperial.ac.uk [Space and Atmospheric Physics, The Blackett Laboratory, Imperial College, London SW7 2BW, UKAND (United Kingdom); School of Mathematics and Statistics, University of St Andrews, St Andrews, Scotland KY16 9SS (United Kingdom)

    2014-03-20

    The temperature dependence of the emission measure (EM) in the core of active regions coronal loops is an important diagnostic of heating processes. Observations indicate that EM(T) ? T{sup a} below approximately 4 MK, with 2 < a < 5. Zero-dimensional hydrodynamic simulations of nanoflare trains are used to demonstrate the dependence of a on the time between individual nanoflares (T{sub N} ) and the distribution of nanoflare energies. If T{sub N} is greater than a few thousand seconds, a < 3. For smaller values, trains of equally spaced nanoflares cannot account for the observed range of a if the distribution of nanoflare energies is either constant, randomly distributed, or a power law. Power law distributions where there is a delay between consecutive nanoflares proportional to the energy of the second nanoflare do lead to the observed range of a. However, T{sub N} must then be of the order of hundreds to no more than a few thousand seconds. If a nanoflare leads to the relaxation of a stressed coronal field to a near-potential state, the time taken to build up the required magnetic energy is thus too long to account for the EM measurements. Instead, it is suggested that a nanoflare involves the relaxation from one stressed coronal state to another, dissipating only a small fraction of the available magnetic energy. A consequence is that nanoflare energies may be smaller than previously envisioned.

  18. 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.

  19. Transport in charged colloids driven by thermoelectricity Alois Wrger

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Transport in charged colloids driven by thermoelectricity Alois Würger CPMOH, Université Bordeaux 1 to a strong increase with temperature. The di¤erence of the heat of transport of co-ions and counterions gives rise to a thermoelectric ...eld that drives the colloid to the cold or to the warm, depending

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

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankADVANCED MANUFACTURING OFFICESpecialAPPENDIX FOrigin ofAllenDepartment of EnergyThermoelectricsHeat

  1. Aalborg Universitet SiC heat pump converters with support for voltage unbalance in distribution grids

    E-Print Network [OSTI]

    Munk-Nielsen, Stig

    Aalborg Universitet SiC heat pump converters with support for voltage unbalance in distribution (APA): Trintis, I., Douglass, P., Maheshwari, R., & Munk-Nielsen, S. (2015). SiC heat pump converters.aau.dk on: november 29, 2015 #12;SiC heat pump converters with support for voltage unbalance in distribution

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

    Broader source: Energy.gov [DOE]

    This project discusses preliminary experimental results to find how thermoelectrics can be applied ot future hybrid vehicles and the optimum design of such equipment using heat pipes

  3. Heat transfer pathways in underfloor air distribution (UFAD) systems

    E-Print Network [OSTI]

    Bauman, F.; Jin, H.; Webster, T.

    2006-01-01

    is little radiative heat transfer and little impact on thereturn air extrac- tion and heat transfer to the plenum. ItUFAD is often used and heat transfer out of the room through

  4. ITP Distributed Energy: 2008 Combined Heat and Power Baseline...

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

    2008 Combined Heat and Power Baseline Assessment and Action Plan for the Nevada Market Final Project Report September 30, 2008 Prepared By: Pacific Region Combined Heat and...

  5. Nanocomposites as thermoelectric materials

    E-Print Network [OSTI]

    Hao, Qing

    2010-01-01

    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, ...

  6. 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

  7. Heat transfer pathways in underfloor air distribution (UFAD) systems

    E-Print Network [OSTI]

    Bauman, F.; Jin, H.; Webster, T.

    2006-01-01

    radiative heat transfer, since radiation was neglectedradiation striking the floor makes up the majority of the total heat transferheat transfer processes: conduction through the slab and floor panels and into the supply plenum via convection; radiation

  8. Sodium heat engine electrical feedthrough

    DOE Patents [OSTI]

    Weber, Neill (Dearborn, MI)

    1985-01-01

    A thermoelectric generator device which converts heat energy to electrical energy. An alkali metal is used with a solid electrolyte and a hermetically sealed feedthrough structure.

  9. A versatile thermoelectric temperature controller with 10 mK reproducibility and 100 mK absolute accuracy

    E-Print Network [OSTI]

    Libbrecht, Kenneth G.

    A versatile thermoelectric temperature controller with 10 mK reproducibility and 100 mK absolute December 2009 We describe a general-purpose thermoelectric temperature controller with 1 mK stability, 10 m elements and thermoelectric modules to heat or cool in the 40 to 40 °C range. A schematic of our controller

  10. In-line thermoelectric module

    DOE Patents [OSTI]

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

    2000-01-01

    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.

  11. High Temperature Integrated Thermoelectric Ststem and Materials

    SciTech Connect (OSTI)

    Mike S. H. Chu

    2011-06-06

    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.

  12. 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

    2014-01-01

    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.

  13. Thermoelectric materials having porosity

    DOE Patents [OSTI]

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

    2014-08-05

    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.

  14. ITP Industrial Distributed Energy: Combined Heat and Power -...

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

    Combined Heat and Power - A Decade of Progress, A Vision for the Future Overview of CHP, DOE's CHP program, accomplishments, progress, technology R&D, marketplace...

  15. 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

  16. General Relativistic Thermoelectric Effects in Superconductors

    E-Print Network [OSTI]

    B. J. Ahmedov

    2007-01-13

    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.

  17. Scalable Routes to Efficient Thermoelectric Materials

    E-Print Network [OSTI]

    Feser, Joseph Patrick

    2010-01-01

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

  18. Vehicular Thermoelectric Applications Session DEER 2009 | Department...

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

    Thermoelectric Applications Session DEER 2009 Vehicular Thermoelectric Applications Session DEER 2009 This presentation is an overview of the DOE thermoelectric program....

  19. Characterizing the thermal efficiency of thermoelectric modules

    E-Print Network [OSTI]

    Phillips, Samuel S

    2009-01-01

    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 ...

  20. Holey Silicon as an Efficient Thermoelectric Material

    E-Print Network [OSTI]

    Tang, Jinyao

    2011-01-01

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

  1. Exploring electron and phonon transport at the nanoscale for thermoelectric energy conversion

    E-Print Network [OSTI]

    Minnich, Austin Jerome

    2011-01-01

    Thermoelectric materials are capable of solid-state direct heat to electricity energy conversion and are ideal for waste heat recovery applications due to their simplicity, reliability, and lack of environmentally harmful ...

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

    Broader source: Energy.gov [DOE]

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

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

    E-Print Network [OSTI]

    Bertreau, Philippe

    2006-01-01

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

  4. ITP Distributed Energy: Assessment of Combined Heat and Power...

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

    optimization software. DER-CAM's goal is to minimize the cost of supplying electric and heat loads of a specific customer site by optimizing the installation and operation of...

  5. Heat storage and distribution inside passive-solar buildings

    SciTech Connect (OSTI)

    Balcomb, J.D.

    1983-05-01

    Passive solar buildings are investigated from the viewpoint of the storage of solar heat in materials of the building: walls, floors, ceilings, and furniture. The effects of the location, material, thickness, and orientation of each internal building surface are investigated. The concept of diurnal heat capacity is introduced and a method of using this parameter to estimate clear-day temperature swings is developed. Convective coupling to remote rooms within a building is discussed. Design guidelines are given.

  6. Spatial Distribution of gamma Emissivity and Fast Ions during (3He)D ICRF Heating Experiments on JET

    E-Print Network [OSTI]

    Spatial Distribution of gamma Emissivity and Fast Ions during (3He)D ICRF Heating Experiments on JET

  7. Inferring surface heat flux distributions guided by a global seismic model: particular application to Antarctica

    E-Print Network [OSTI]

    Shapiro, Nikolai

    , the procedure generates a histogram of heat-flow values determined from existing measurements obtained from are strongly non-Gaussian, but are well approximated by the log-logistic distribution which is completely

  8. Local heat transfer distribution in a triangular channel with smooth walls and staggered ejection holes 

    E-Print Network [OSTI]

    Moon, Sung-Won

    1999-01-01

    Transient liquid crystal experiments have been conducted to determine the distribution of the local heat transfer coefficient in a triangular channel with smooth wails and ejection holes along one or two of the wails. The end of the test channel...

  9. Heat/mass transfer distribution in rotating two-pass square channel 

    E-Print Network [OSTI]

    Kandis, Mouhyieldin

    1994-01-01

    The heat/mass trasfer distribution for turbulent flow in a rotating two-pass square channel having a sharp 180' turn were investigated via the naphthalene sublimation technique. The test section models the internal cooling passages of gas turbine...

  10. A PC simulation of heat transfer and temperature distribution in a circulating wellbore 

    E-Print Network [OSTI]

    Pierce, Robert Duane

    1987-01-01

    -Wold (Chair of Committee) James E. Russell (Member) Earl R. Hoskins (Member) D, Von Gonton (H ad of Department) December 1987 ABSTRACT A PC Simulation of Heat Transfer and Temperature Distribution in a Circulating Wellbore (December 1987) Robert... SUPPLEMENTAL SOURCES CONSULTED APPENDIX A: MATHEMATICAL MODEL AND TREATMENT 103 108 APPENDIX B: DERIVATION OF RAMEY'SS WELLBORE HEAT TRANSMISSION SOLUTION 112 APPENDIX C: RHEOLOGICAL PRESSURE LOSS MODEL CALCULATIONS APPENDIX D: OVER-ALL HEAT TRANSFER...

  11. Heat storage and distribution inside passive-solar buildings

    SciTech Connect (OSTI)

    Balcomb, J.D.

    1983-01-01

    Passive-solar buildings are investigated from the viewpoint of the storage of solar heat in materials of the building: walls, floors, ceilings, and furniture. The effects of the location, material, thickness, and orientation of each internal building surface are investigated. The concept of diurnal heat capacity is introduced and a method of using this parameter to estimate clear-day temperature swings is developed. Convective coupling to remote rooms within a building is discussed, including both convection through single doorways and convective loops that may exist involving a sunspace. Design guidelines are given.

  12. Significant enhancement in thermoelectric properties of polycrystalline Pr-doped SrTiO{sub 3??} ceramics originating from nonuniform distribution of Pr dopants

    SciTech Connect (OSTI)

    Dehkordi, Arash Mehdizadeh; Bhattacharya, Sriparna; He, Jian; Alshareef, Husam N.; Tritt, Terry M.

    2014-05-12

    Recently, we have reported a significant enhancement (>70% at 500?°C) in the thermoelectric power factor (PF) of bulk polycrystalline Pr-doped SrTiO{sub 3} ceramics employing a novel synthesis strategy which led to the highest ever reported values of PF among doped polycrystalline SrTiO{sub 3}. It was found that the formation of Pr-rich grain boundary regions gives rise to an enhancement in carrier mobility. In this Letter, we investigate the electronic and thermal transport in Sr{sub 1?x}Pr{sub x}TiO{sub 3} ceramics in order to determine the optimum doping concentration and to evaluate the overall thermoelectric performance. Simultaneous enhancement in the thermoelectric power factor and reduction in thermal conductivity in these samples resulted in more than 30% improvement in the dimensionless thermoelectric figure of merit (ZT) for the whole temperature range over all previously reported maximum values. Maximum ZT value of 0.35 was obtained at 500?°C.

  13. 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)

    2012-07-17

    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.

  14. 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,...

  15. 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...

  16. Encapsulation of High Temperature Thermoelectric Modules | Department...

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

    Encapsulation of High Temperature Thermoelectric Modules Encapsulation of High Temperature Thermoelectric Modules Presents concept for hermetic encapsulation of TE modules...

  17. 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...

  18. 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...

  19. 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,...

  20. Recent Theoretical Results for Advanced Thermoelectric Materials...

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

    Theoretical Results for Advanced Thermoelectric Materials Recent Theoretical Results for Advanced Thermoelectric Materials Transport theory and first principles calculations...

  1. 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...

  2. Commercialization of Bulk Thermoelectric Materials for Power...

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

    Commercialization of Bulk Thermoelectric Materials for Power Generation Commercialization of Bulk Thermoelectric Materials for Power Generation Critical aspects of technology...

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

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

    Thermoelectric Power Generation Technologies in Japan Overview of Thermoelectric Power Generation Technologies in Japan Discusses thermoelectric power generation technologies as...

  4. Electronic, Vibrational and Thermoelectric Properties of Two-Dimensional Materials

    E-Print Network [OSTI]

    Wickramaratne, Darshana

    2015-01-01

    Landauer Thermoelectric3 Electronic and Thermoelectric Properties of Few-Layer5 Electronic and thermoelectric properties of van der Waals

  5. Heat transfer pathways in underfloor air distribution (UFAD) systems

    E-Print Network [OSTI]

    Bauman, F.; Jin, H.; Webster, T.

    2006-01-01

    air distribution: Thermal stratification. ASHRAE Journalstratification is increased and temperatures near the ceiling rise, this condition aggra- vates the thermalthermal decay can be a problem. Properly controlled UFAD systems produce temperature stratification

  6. The thermoelectric properties of molecular junctions can now be investigated with scanning tunnelling microscopy. Such experiments provide insights into charge transport in single

    E-Print Network [OSTI]

    Walsworth, Ronald L.

    The thermoelectric properties of molecular junctions can now be investigated with scanning . They used a scanning tunnelling microscope (STM) to investigate thermoelectricity -- the voltage generated that thermoelectric measurements by STM provide a solution to this problem MOLECULAR ELECTRONICS Charges feel the heat

  7. Thermoelectric Contact Resistances Professor HoSung Lee

    E-Print Network [OSTI]

    Lee, Ho Sung

    Thermoelectric Contact Resistances Professor HoSung Lee Contents Thermoelectrics....................................................................................................................1 Ideal Formulas for Thermoelectric generators.................................................................1 Realistic Formulas for Thermoelectric generators

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

    E-Print Network [OSTI]

    towards one end, creating a difference in potential. The efficiency of thermo- electric generators (TEG of Thermoelectric Generation 1A phonon is a fundamental quantum mechanical vibration mode of a material that is used efficiencies when converting heat to electricity using the thermoelectric ef- fect. Applied to microprocessors

  9. Electronic, phononic, and thermoelectric properties of graphyne sheets

    SciTech Connect (OSTI)

    Sevinçli, Hâldun; Sevik, Cem

    2014-12-01

    Electron, phonon, and thermoelectric transport properties of ?-, ?-, ?-, and 6,6,12-graphyne sheets are compared and contrasted with those of graphene. ?-, ?-, and 6,6,12-graphynes, with direction dependent Dirac dispersions, have higher electronic transmittance than graphene. ?-graphyne also attains better electrical conduction than graphene except at its band gap. Vibrationally, graphene conducts heat much more efficiently than graphynes, a behavior beyond an atomic density differences explanation. Seebeck coefficients of the considered Dirac materials are similar but thermoelectric power factors decrease with increasing effective speeds of light. ?-graphyne yields the highest thermoelectric efficiency with a thermoelectric figure of merit as high as ZT?=?0.45, almost an order of magnitude higher than that of graphene.

  10. Fiber optic signal amplifier using thermoelectric power generation

    DOE Patents [OSTI]

    Hart, M.M.

    1993-01-01

    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.

  11. Fiber optic signal amplifier using thermoelectric power generation

    DOE Patents [OSTI]

    Hart, M.M.

    1995-04-18

    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.

  12. Fiber optic signal amplifier using thermoelectric power generation

    DOE Patents [OSTI]

    Hart, Mark M. (Aiken, SC)

    1995-01-01

    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.

  13. Real-time imaging of the spatial distribution of rf-heating in NMR samples during broadband decoupling

    E-Print Network [OSTI]

    Wider, Gerhard

    by the temperature control system. Moreover, as the heating is spatially inhomogeneous, higher temperature increasesReal-time imaging of the spatial distribution of rf-heating in NMR samples during broadband and spin-lock periods in NMR pulse sequences may lead to undesired sample heating. Heat-sensitive samples

  14. Thermoelectric Materials, Devices and Systems:

    Office of Environmental Management (EM)

    of thermoelectric assembly. A commonly discussed cost target in the 243 thermoelectric field is 1 W for an installed system. This, along with a system life of only 5 years, a...

  15. Suppressing the bipolar contribution to the thermoelectric properties of Mg2Si0.4Sn0.6 by Ge substitution

    E-Print Network [OSTI]

    Henkelman, Graeme

    interest because of potential applications in waste heat recovery and refrigeration. The heat to electric-type TE materials for waste heat recovery because of their high thermoelectric performance as well

  16. Nanostructured thin film thermoelectric composite materials using conductive polymer PEDOT:PSS

    E-Print Network [OSTI]

    Kuryak, Chris A. (Chris Adam)

    2013-01-01

    Thermoelectric materials have the ability to convert heat directly into electricity. This clean energy technology has advantages over other renewable technologies in that it requires no sunlight, has no moving parts, and ...

  17. Modeling and characterization of thermoelectric properties of SiGe nanocomposites

    E-Print Network [OSTI]

    Lee, Hohyun, 1978-

    2009-01-01

    Direct energy conversion between thermal and electrical energy based on thermoelectric effects is attractive for potential applications in waste heat recovery and environmentally-friendly refrigeration. The energy conversion ...

  18. Understanding and designing carbon-based thermoelectric materials with atomic-scale simulations

    E-Print Network [OSTI]

    Kim, Jeong Yun

    2015-01-01

    Thermoelectric (TE) materials, which can convert unused waste heat into useful electricity or vice versa, could play an important role in solving the current global energy challenge of providing sustainable and clean energy. ...

  19. A batteryless thermoelectric energy-harvesting interface circuit with 35mV startup voltage

    E-Print Network [OSTI]

    Ramadass, Yogesh Kumar

    A batteryless thermoelectric energy-harvesting interface circuit to extract electrical energy from human body heat is implemented in a 0.35 ?m [mu m] CMOS process. A mechanically assisted startup circuit enables operation ...

  20. Synthetic thermoelectric materials comprising phononic crystals

    DOE Patents [OSTI]

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

    2013-08-13

    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.

  1. Office Building Uses Ice Storage, Heat Recovery, and Cold-Air Distribution 

    E-Print Network [OSTI]

    Tackett, R. K.

    1989-01-01

    Ice storage offers many opportunities to use other tcchnologies, such as heat recovery and cold-air distribution. In fact, by using them, the designer can improve the efficiency and lower the construction cost of an ice system. This paper presents a...

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

    Broader source: Energy.gov [DOE]

    Large-dimension, high-ZT BiTe and Pb-based nanocomposites produced with a low-cost scalable process were used for development and testing of TE module prototypes, and demonstration of a waste heat recovery system

  3. A Novel VLSI Technology to Manufacture High-Density Thermoelectric Cooling Devices

    E-Print Network [OSTI]

    H. Chen; L. Hsu; X. Wei

    2008-01-07

    This paper describes a novel integrated circuit technology to manufacture high-density thermoelectric devices on a semiconductor wafer. With no moving parts, a thermoelectric cooler operates quietly, allows cooling below ambient temperature, and may be used for temperature control or heating if the direction of current flow is reversed. By using a monolithic process to increase the number of thermoelectric couples, the proposed solid-state cooling technology can be combined with traditional air cooling, liquid cooling, and phase-change cooling to yield greater heat flux and provide better cooling capability.

  4. Thermoelectrically cooled water trap

    DOE Patents [OSTI]

    Micheels, Ronald H. (Concord, MA)

    2006-02-21

    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.

  5. Simple method for highlighting the temperature distribution into a liquid sample heated by microwave power field

    SciTech Connect (OSTI)

    Surducan, V.; Surducan, E.; Dadarlat, D. [National Institute for Research and Development of Isotopic and Molecular Technologies, 65-103 Donath Street, Cluj-Napoca (Romania)] [National Institute for Research and Development of Isotopic and Molecular Technologies, 65-103 Donath Street, Cluj-Napoca (Romania)

    2013-11-13

    Microwave induced heating is widely used in medical treatments, scientific and industrial applications. The temperature field inside a microwave heated sample is often inhomogenous, therefore multiple temperature sensors are required for an accurate result. Nowadays, non-contact (Infra Red thermography or microwave radiometry) or direct contact temperature measurement methods (expensive and sophisticated fiber optic temperature sensors transparent to microwave radiation) are mainly used. IR thermography gives only the surface temperature and can not be used for measuring temperature distributions in cross sections of a sample. In this paper we present a very simple experimental method for temperature distribution highlighting inside a cross section of a liquid sample, heated by a microwave radiation through a coaxial applicator. The method proposed is able to offer qualitative information about the heating distribution, using a temperature sensitive liquid crystal sheet. Inhomogeneities as smaller as 1°-2°C produced by the symmetry irregularities of the microwave applicator can be easily detected by visual inspection or by computer assisted color to temperature conversion. Therefore, the microwave applicator is tuned and verified with described method until the temperature inhomogeneities are solved.

  6. Measurements and Standards for Thermoelectric Materials

    E-Print Network [OSTI]

    Measurements and Standards for Thermoelectric Materials CERAMICS Our goal is to develop standard, electrical conductivity, thermal conductivity) for thin film and bulk thermoelectric materials to enable approach will facilitate comparison of thermoelectric data between leading laboratories, and accelerate

  7. 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

    2015-01-01

    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.

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

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

    with Advanced Bulk Thermoelectric Materials at RTI Reviews work in engineered thin-film nanoscale thermoelectric materials and nano-bulk materials with high ZT undertaken by...

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

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

    with the NSF deer11fairbanks.pdf More Documents & Publications Thermoelectrics: The New Green Automotive Technology Automotive Thermoelectric Generators and HVAC Solid-State...

  10. Automotive Thermoelectric Generators and HVAC | Department of...

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

    Generators and HVAC Automotive Thermoelectric Generators and HVAC Provides overview of DOE-supported projects in automotive thermoelectric generators and heatersair conditioners...

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

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

    Interfacial Structure in Thermoelectric Tellurides Investigations of Interfacial Structure in Thermoelectric Tellurides Discusses examples of work on the investigation of atomic...

  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. Potential Thermoelectric Applications in Diesel Vehicles | Department...

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

    Thermoelectric Applications in Diesel Vehicles Potential Thermoelectric Applications in Diesel Vehicles 2003 DEER Conference Presentation: BSST, LLC 2003deercrane.pdf More...

  14. The Synthesis of CaZn2Sb2 and its Thermoelectric Properties Dan Stark, G. J. Snyder

    E-Print Network [OSTI]

    tested for material composition, structure, and thermoelectric properties. Results of this experiment's engine, and heat regulators for computer processors. Thermoelectric materials fit these requirements characteristics. This is due to the ability of the heavy antimony ion to scatter phonons much more effectively

  15. 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)

    1990-01-01

    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.

  16. Ionic Liquids for Utilization of Waste Heat from Distributed Power Generation Systems

    SciTech Connect (OSTI)

    Joan F. Brennecke; Mihir Sen; Edward J. Maginn; Samuel Paolucci; Mark A. Stadtherr; Peter T. Disser; Mike Zdyb

    2009-01-11

    The objective of this research project was the development of ionic liquids to capture and utilize waste heat from distributed power generation systems. Ionic Liquids (ILs) are organic salts that are liquid at room temperature and they have the potential to make fundamental and far-reaching changes in the way we use energy. In particular, the focus of this project was fundamental research on the potential use of IL/CO2 mixtures in absorption-refrigeration systems. Such systems can provide cooling by utilizing waste heat from various sources, including distributed power generation. The basic objectives of the research were to design and synthesize ILs appropriate for the task, to measure and model thermophysical properties and phase behavior of ILs and IL/CO2 mixtures, and to model the performance of IL/CO2 absorption-refrigeration systems.

  17. Sodium heat engine electrical feedthrough

    DOE Patents [OSTI]

    Weber, N.

    1985-03-19

    A thermoelectric generator device which converts heat energy to electrical energy is disclosed. An alkali metal is used with a solid electrolyte and a hermetically sealed feedthrough structure. 4 figs.

  18. Thermoelectric power generator for variable thermal power source

    DOE Patents [OSTI]

    Bell, Lon E; Crane, Douglas Todd

    2015-04-14

    Traditional power generation systems using thermoelectric power generators are designed to operate most efficiently for a single operating condition. The present invention provides a power generation system in which the characteristics of the thermoelectrics, the flow of the thermal power, and the operational characteristics of the power generator are monitored and controlled such that higher operation efficiencies and/or higher output powers can be maintained with variably thermal power input. Such a system is particularly beneficial in variable thermal power source systems, such as recovering power from the waste heat generated in the exhaust of combustion engines.

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

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

    a 100-Watt High Temperature Thermoelectric Generator Development of a 100-Watt High Temperature Thermoelectric Generator Test results for low and high temperature thermoelectric...

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

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

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

  1. 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.

    2006-01-01

    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

  2. Materials Growth and Characterization of Thermoelectric and Resistive Switching Devices

    E-Print Network [OSTI]

    Norris, Kate Jeanne

    2015-01-01

    and M. S. Dresselhaus, “Thermoelectric figure of merit of aand I. Knezevic, “Thermoelectric properties of ultrathinand K. Koumoto, “Giant thermoelectric Seebeck coefficient of

  3. 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.

    2011-01-01

    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

  4. 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...

  5. Effect of Nanoparticles on Electron and Thermoelectric Transport

    E-Print Network [OSTI]

    2009-01-01

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

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

    E-Print Network [OSTI]

    Fukutani, K; Shakouri, A

    2006-01-01

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

  7. 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

  8. Distributed energy resources customer adoption modeling with combined heat and power applications

    SciTech Connect (OSTI)

    Siddiqui, Afzal S.; Firestone, Ryan M.; Ghosh, Srijay; Stadler, Michael; Edwards, Jennifer L.; Marnay, Chris

    2003-07-01

    In this report, an economic model of customer adoption of distributed energy resources (DER) is developed. It covers progress on the DER project for the California Energy Commission (CEC) at Berkeley Lab during the period July 2001 through Dec 2002 in the Consortium for Electric Reliability Technology Solutions (CERTS) Distributed Energy Resources Integration (DERI) project. CERTS has developed a specific paradigm of distributed energy deployment, the CERTS Microgrid (as described in Lasseter et al. 2002). The primary goal of CERTS distributed generation research is to solve the technical problems required to make the CERTS Microgrid a viable technology, and Berkeley Lab's contribution is to direct the technical research proceeding at CERTS partner sites towards the most productive engineering problems. The work reported herein is somewhat more widely applicable, so it will be described within the context of a generic microgrid (mGrid). Current work focuses on the implementation of combined heat and power (CHP) capability. A mGrid as generically defined for this work is a semiautonomous grouping of generating sources and end-use electrical loads and heat sinks that share heat and power. Equipment is clustered and operated for the benefit of its owners. Although it can function independently of the traditional power system, or macrogrid, the mGrid is usually interconnected and exchanges energy and possibly ancillary services with the macrogrid. In contrast to the traditional centralized paradigm, the design, implementation, operation, and expansion of the mGrid is meant to optimize the overall energy system requirements of participating customers rather than the objectives and requirements of the macrogrid.

  9. Thermal cycling effect on the nanoparticle distribution and specific heat of a carbonate eutectic with alumina nanoparticles 

    E-Print Network [OSTI]

    Shankar, Sandhya

    2011-08-08

    The objective of this research was to measure the effect of thermal cycling on the nanoparticle distribution and specific heat of a nanocomposite material consisting of a eutectic of lithium carbonate and potassium carbonate and 1% by mass alumina...

  10. High performance thermoelectric nanocomposite device

    DOE Patents [OSTI]

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

    2011-10-25

    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.

  11. Energy Distribution of Heating Processes in the Quiet Solar Sam Krucker 1;2 and Arnold O. Benz 1

    E-Print Network [OSTI]

    Energy Distribution of Heating Processes in the Quiet Solar Corona S¨am Krucker 1;2 and Arnold O region of the Sun. The emission measure is found to vary significantly in at least 85% of all the pixels is calculated from the observed increases in emission measure and the derived temperature. Heating events have

  12. The Racial/ Ethnic Distribution of Heat Risk–Related Land Cover in Relation to Residential Segregation

    E-Print Network [OSTI]

    Jesdale, Bill; Morello-Frosch, Rachel; Cushing, Lara

    2013-01-01

    contribute to urban heat islands and surface temperaturesvariability in the urban heat island. Theor Appl ClimatolSchaefer VR. 2011. Cyclic heat island impacts on traditional

  13. Distributed energy resources customer adoption modeling with combined heat and power applications

    E-Print Network [OSTI]

    Siddiqui, Afzal S.; Firestone, Ryan M.; Ghosh, Srijay; Stadler, Michael; Edwards, Jennifer L.; Marnay, Chris

    2003-01-01

    Modeling with Combined Heat and Power Applications SCE, S.Modeling with Combined Heat and Power Applications FigureModeling with Combined Heat and Power Applications Figure

  14. The Racial/ Ethnic Distribution of Heat Risk–Related Land Cover in Relation to Residential Segregation

    E-Print Network [OSTI]

    Jesdale, Bill; Morello-Frosch, Rachel; Cushing, Lara

    2013-01-01

    role in creating urban heat island effects (Oke 1982). Urbanvariability in the urban heat island. Theor Appl ClimatolSchaefer VR. 2011. Cyclic heat island impacts on traditional

  15. Method for distributing chemicals through a fibrous material using low-headspace dielectric heating

    DOE Patents [OSTI]

    Banerjee, Sujit (Marietta, GA); Malcolm, Earl (Bluffton, SC)

    2002-01-01

    System and method for diffusing chemicals rapidly and evenly into and through fibrous material, such as wood. Chemicals are introduced into the fibrous material by applying the chemicals to the fibrous material. After treating the fibrous material with the chemicals, the fibrous material is maintained under low-headspace conditions. Thermal energy or dielectric heating, such as microwave or radio frequency energy, is applied to the fibrous material. As a result, the chemicals are able to distribute evenly and quickly throughout the fibrous material.

  16. THERMOELECTRIC PROPERTIES OF ULTRASCALED SILICON NANOWIRES Edwin Bosco Ramayya

    E-Print Network [OSTI]

    Knezevic, Irena

    THERMOELECTRIC PROPERTIES OF ULTRASCALED SILICON NANOWIRES by Edwin Bosco Ramayya A dissertation.1 Thermoelectric Effects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.2 Figure Of Merit For Thermoelectric Cooling . . . . . . . . . . . . . . . . . . . . . 4 1.3 Semiconductors in Thermoelectric

  17. Manufacture of thermoelectric generator structures by fiber drawing

    DOE Patents [OSTI]

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

    2014-11-18

    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. GREENHOUSE GAS REDUCTION POTENTIAL WITH COMBINED HEAT AND POWER WITH DISTRIBUTED GENERATION PRIME MOVERS - ASME 2012

    SciTech Connect (OSTI)

    Curran, Scott; Theiss, Timothy J; Bunce, Michael

    2012-01-01

    Pending or recently enacted greenhouse gas regulations and mandates are leading to the need for current and feasible GHG reduction solutions including combined heat and power (CHP). Distributed generation using advanced reciprocating engines, gas turbines, microturbines and fuel cells has been shown to reduce greenhouse gases (GHG) compared to the U.S. electrical generation mix due to the use of natural gas and high electrical generation efficiencies of these prime movers. Many of these prime movers are also well suited for use in CHP systems which recover heat generated during combustion or energy conversion. CHP increases the total efficiency of the prime mover by recovering waste heat for generating electricity, replacing process steam, hot water for buildings or even cooling via absorption chilling. The increased efficiency of CHP systems further reduces GHG emissions compared to systems which do not recover waste thermal energy. Current GHG mandates within the U.S Federal sector and looming GHG legislation for states puts an emphasis on understanding the GHG reduction potential of such systems. This study compares the GHG savings from various state-of-the- art prime movers. GHG reductions from commercially available prime movers in the 1-5 MW class including, various industrial fuel cells, large and small gas turbines, micro turbines and reciprocating gas engines with and without CHP are compared to centralized electricity generation including the U.S. mix and the best available technology with natural gas combined cycle power plants. The findings show significant GHG saving potential with the use of CHP. Also provided is an exploration of the accounting methodology for GHG reductions with CHP and the sensitivity of such analyses to electrical generation efficiency, emissions factors and most importantly recoverable heat and thermal recovery efficiency from the CHP system.

  20. 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 ...

  1. 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

  2. Distributed energy resources customer adoption modeling with combined heat and power applications

    E-Print Network [OSTI]

    Siddiqui, Afzal S.; Firestone, Ryan M.; Ghosh, Srijay; Stadler, Michael; Edwards, Jennifer L.; Marnay, Chris

    2003-01-01

    of Microgrid Distributed Energy Resource Potential Usingon Integration of Distributed Energy Resources: The CERTSof Customer Adoption of Distributed Energy Resources. ”

  3. Quantum Well Thermoelectrics and Waste Heat Recovery

    Broader source: Energy.gov [DOE]

    Presentation given at the 2007 Diesel Engine-Efficiency & Emissions Research Conference (DEER 2007). 13-16 August, 2007, Detroit, Michigan. Sponsored by the U.S. Department of Energy's (DOE) Office of FreedomCAR and Vehicle Technologies (OFCVT).

  4. Incorporation and distribution of rhenium in a borosilicate glass melt heat treated in a sealed ampoule

    SciTech Connect (OSTI)

    Kim, Dong-Sang; Schweiger, Michael J.

    2013-07-25

    We investigated a mass balance of rhenium (used as a surrogate for technetium-99) in a borosilicate glass that was mixed with excess Re source (KReO4) beyond its solubility and heat treated in a vacuum-sealed fused silica ampoule. Distribution of Re in the bulk of the glass, in a salt phase formed on the melt surface, and in condensate material deposited on the ampoule wall was evaluated to understand the Re migration into different phases during the reaction between the molten glass and KReO4. The information gained from this study will contribute to an effort to understand the mechanism of technetium retention in or escape from glass melt during early stages of glass batch melting, which is a goal of the present series of studies.

  5. Mobile power plants : waste body heat recovery

    E-Print Network [OSTI]

    Gibbons, Jonathan S. (Jonathan Scott), 1979-

    2004-01-01

    Novel methods to convert waste metabolic heat into useful and useable amounts of electricity were studied. Thermoelectric, magneto hydrodynamic, and piezo-electric energy conversions at the desired scope were evaluated to ...

  6. Local heat transfer distribution in a two-pass trapezoidal channel with a 180 [degree] turn via transient liquid crystal technique 

    E-Print Network [OSTI]

    Endley, Saurabh

    1996-01-01

    cross section. Attention is focused on the effect of the 180' turn on the local heat transfer distributions on the interior surfaces of the various walls at the turn, under turbulent flow conditions. Transient heat transfer experiments, using...

  7. Thermoelectric Applications to Truck Essential Power

    SciTech Connect (OSTI)

    John C. Bass; Norbert B. Elsner

    2001-12-12

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

  8. 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 ...

  9. Reliability of Transport Properties for Bulk Thermoelectrics

    Broader source: Energy.gov [DOE]

    Presents international round-robin study to ensure quality of transport data and figure of merit of thermoelectric materials

  10. 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...

  11. 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

  12. Temperature distribution in a flowing fluid heated in a microwave resonant cavity

    SciTech Connect (OSTI)

    Thomas, J.R. Jr. [Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (United States); Nelson, E.M.; Kares, R.J.; Stringfield, R.M. [Los Alamos National Lab., NM (United States)

    1996-04-01

    This paper presents results of an analytical study of microwave heating of a fluid flowing through a tube situated along the axis of a cylindrical microwave applicator. The interaction of the microwave field pattern and the fluid velocity profiles is illustrated for both laminar and turbulent flow. Resulting temperature profiles are compared with those generated by conventional heating through a surface heat flux. It is found that microwave heating offers several advantages over conventional heating.

  13. Heat flow and subsurface temperature distributions in central and western New York. Final report

    SciTech Connect (OSTI)

    Hodge, D.S.; Fromm, K.

    1984-01-01

    Initiation of a geothermal energy program in western and central New York requires knowledge of subsurface temperatures for targeting areas of potential resources. The temperature distribution in possible geothermal reservoirs, calculated from heat flow measurements and modeling techniques, shows that a large area of New York can be considered for exploitation of geothermal resources. Though the temperatures at currently accessible depths show the availability of only a low-temperature (less than 100/sup 0/C), direct-use resource, this can be considered as an alternative for the future energy needs of New York State. From analysis of bottom-hole-temperature data and direct heat flow measurements, estimates of temperatures in the Cambrian Sandstones provide the basis of the economic evaluation of the reservoir. This reservoir contains the extractable fluids needed for targeting a potential geothermal well site in the low-temperature geothermal target zone. In the northern section of the Appalachian basin, reservoir temperatures in the Cambrian are below 50/sup 0/C but may be over 80/sup 0/C in the deeper parts of the basin in southern New York State. Using a minimum of 50/sup 0/C as a useful reservoir temperature, temperatures in excess of this value are encountered in the Theresa Formation at depths in excess of 1300 meters. Considering a maximum depth for economical drilling to be 2500 meters with present technology, the 2500 meters to the Theresa (sea level datum) forms the lower limit of the geothermal resource. Temperatures in the range of 70/sup 0/C to 80/sup 0/C are predicted for the southern portion of New York State.

  14. Electron heat flow in the solar corona: Implications of non-Maxwellian velocity distributions, the solar gravitational

    E-Print Network [OSTI]

    Scudder, Jack

    Electron heat flow in the solar corona: Implications of non-Maxwellian velocity distributions, the solar gravitational field, and Coulomb collisions John C. Dorelli Space and Atmospheric Science Group, Los Alamos National Laboratory, Los Alamos, New Mexico, USA Jack D. Scudder Department of Physics

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

    E-Print Network [OSTI]

    Norwood, Zachary Mills

    2011-01-01

    Global Warming Potential, and Water for Distributed Concentrating SolarGlobal Warming Potential, and Water for Distributed Concentrating Solar

  16. Distributed energy resources customer adoption modeling with combined heat and power applications

    E-Print Network [OSTI]

    Siddiqui, Afzal S.; Firestone, Ryan M.; Ghosh, Srijay; Stadler, Michael; Edwards, Jennifer L.; Marnay, Chris

    2003-01-01

    Carbon emissions rate from burning natural gas to meet heating and cooling loads (kg/kWh) Natural gas price

  17. Thermoelectric refrigerator having improved temperature stabilization means

    DOE Patents [OSTI]

    Falco, Charles M. (Woodridge, IL)

    1982-01-01

    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.

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

    E-Print Network [OSTI]

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

    2013-01-01

    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.

  19. New nano structure approaches for bulk thermoelectric materials

    E-Print Network [OSTI]

    Kim, Jeonghoon

    2010-01-01

    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-

  20. Thermoelectric Transport in a ZrN/ScN Superlattice

    E-Print Network [OSTI]

    2009-01-01

    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/

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

    E-Print Network [OSTI]

    Norwood, Zachary Mills

    2011-01-01

    scale power plants. Distributed renewable energy has alreadypenetration of renewable distributed energy generation.distributed generation effectively bypasses many of the hurdles found in siting and permitting other renewable energy

  2. Distributed energy resources customer adoption modeling with combined heat and power applications

    E-Print Network [OSTI]

    Siddiqui, Afzal S.; Firestone, Ryan M.; Ghosh, Srijay; Stadler, Michael; Edwards, Jennifer L.; Marnay, Chris

    2003-01-01

    Alex Farrell of the Energy and Resources Group, UniversityMicrogrid Distributed Energy Resource Potential Using DER-of Distributed Energy Resources: The CERTS MicroGrid

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

    E-Print Network [OSTI]

    Norwood, Zachary Mills

    2011-01-01

    shaded regions represent power generation costs . . 11 Heat-against conventional power generation technologies when thephotovoltaic and wind power generation have recently seen

  4. Thermoelectric measurement equipments This instrument is designed for simultaneous measurement of Seebeck coefficient and

    E-Print Network [OSTI]

    Taya, Minoru

    measurement of Seebeck coefficient and electric conductivity for the evaluation of thermoelectric electromotive force. · Employment of an infrared gold image heating furnace that excels in temperature.1 msec/0.3 msec or less Sensor Thermocouple Thermocouple, IR detector Measurement Thermal diffusivity

  5. High thermoelectric performance by resonant dopant indium in nanostructured SnTe

    E-Print Network [OSTI]

    Liao, Bolin

    From an environmental perspective, lead-free SnTe would be preferable for solid-state waste heat recovery if its thermoelectric figure-of-merit could be brought close to that of the lead-containing chalcogenides. In this ...

  6. High Performance Bulk Thermoelectric Materials

    SciTech Connect (OSTI)

    Ren, Zhifeng

    2013-03-31

    Over 13 plus years, we have carried out research on electron pairing symmetry of superconductors, growth and their field emission property studies on carbon nanotubes and semiconducting nanowires, high performance thermoelectric materials and other interesting materials. As a result of the research, we have published 104 papers, have educated six undergraduate students, twenty graduate students, nine postdocs, nine visitors, and one technician.

  7. New nano structure approaches for bulk thermoelectric materials

    E-Print Network [OSTI]

    Kim, Jeonghoon

    2010-01-01

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

  8. Thermoelectrical Energy Recovery From the Exhaust of a Light...

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

    Thermoelectrical Energy Recovery From the Exhaust of a Light Truck Thermoelectrical Energy Recovery From the Exhaust of a Light Truck 2003 DEER Conference Presentation: Clarkson...

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

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

    a 500 Watt High Temperature Thermoelectric Generator Development of a 500 Watt High Temperature Thermoelectric Generator A low temperature TEG has been built and tested providing...

  10. Development of a Scalable 10% Efficient Thermoelectric Generator...

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

    a Scalable 10% Efficient Thermoelectric Generator Development of a Scalable 10% Efficient Thermoelectric Generator Presentation given at the 2007 Diesel Engine-Efficiency &...

  11. Thermoelectric Generator Development at Renault Trucks-Volvo...

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

    at Renault Trucks-Volvo Group Thermoelectric Generator Development at Renault Trucks-Volvo Group Reviews project to study the potential of thermoelectricity for diesel engines of...

  12. 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) Save the project as Thermoelectric-Generator-Workbench. Specifying the Materials and Properties 1

  13. PACCAR/Hi-Z Thermoelectric Generator Project | Department of...

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

    PACCARHi-Z Thermoelectric Generator Project PACCARHi-Z Thermoelectric Generator Project 2002 DEER Conference Presentation: Hi-Z Technology, Inc. 2002deerbergstrand.pdf More...

  14. 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...

  15. 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...

  16. 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...

  17. Role of Thermoelectrics in Vehicle Efficiency Increase | Department...

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

    Role of Thermoelectrics in Vehicle Efficiency Increase Role of Thermoelectrics in Vehicle Efficiency Increase 2005 Diesel Engine Emissions Reduction (DEER) Conference Presentations...

  18. 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...

  19. Status of the Application of Thermoelectric Technology in Vehicles...

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

    the Application of Thermoelectric Technology in Vehicles Status of the Application of Thermoelectric Technology in Vehicles 2004 Diesel Engine Emissions Reduction (DEER) Conference...

  20. 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...

  1. 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 &...

  2. 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...

  3. 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...

  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. A Solution Route to Thermoelectric Oxide Nanoparticles - A Sol...

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

    A Solution Route to Thermoelectric Oxide Nanoparticles - A Sol-Gel Process Employing Heterometallic Alkoxides A Solution Route to Thermoelectric Oxide Nanoparticles - A Sol-Gel...

  6. Concentrated Solar Thermoelectric Power

    SciTech Connect (OSTI)

    Chen, Gang; Ren, Zhifeng

    2015-07-09

    The goal of this project is to demonstrate in the lab that solar thermoelectric generators (STEGs) can exceed 10% solar-to-electricity efficiency, and STEGs can be integrated with phase-change materials (PCM) for thermal storage, providing operation beyond daylight hours. This project achieved significant progress in many tasks necessary to achieving the overall project goals. An accurate Themoelectric Generator (TEG) model was developed, which included realistic treatment of contact materials, contact resistances and radiative losses. In terms of fabricating physical TEGs, high performance contact materials for skutterudite TE segments were developed, along with brazing and soldering methods to assemble segmented TEGs. Accurate measurement systems for determining device performance (in addition to just TE material performance) were built for this project and used to characterize our TEGs. From the optical components’ side, a spectrally selective cermet surface was developed with high solar absorptance and low thermal emittance, with thermal stability at high temperature. A measurement technique was also developed to determine absorptance and total hemispherical emittance at high temperature, and was used to characterize the fabricated spectrally selective surfaces. In addition, a novel reflective cavity was designed to reduce radiative absorber losses and achieve high receiver efficiency at low concentration ratios. A prototype cavity demonstrated that large reductions in radiative losses were possible through this technique. For the overall concentrating STEG system, a number of devices were fabricated and tested in a custom built test platform to characterize their efficiency performance. Additionally, testing was performed with integration of PCM thermal storage, and the storage time of the lab scale system was evaluated. Our latest testing results showed a STEG efficiency of 9.6%, indicating promising potential for high performance concentrated STEGs.

  7. Municipal District Heating and Cooling Co-generation System Feasibility Research 

    E-Print Network [OSTI]

    Zhang, W.; Guan, W.; Pan, Y.; Ding, G.; Song, X.; Zhang, Y.; Li, Y.; Wei, H.; He, Y.

    2006-01-01

    In summer absorption refrigerating machines provide cold water using excess heat from municipal thermoelectric power plant through district heating pipelines, which reduces peak electric load from electricity networks in summer. The paper simulates...

  8. Potential thermoelectric performance from optimization of hole-doped Bi2Se3

    SciTech Connect (OSTI)

    Parker, David S [ORNL; Singh, David J [ORNL

    2011-01-01

    We present an analysis of the potential thermoelectric performance of hole-doped Bi2Se3, which is commonly considered to show inferior room temperature performance when compared to Bi2Te3. We find that if the lattice thermal conductivity can be reduced by nanostructuring techniques (as have been applied to Bi2Te3) the material may show optimized ZT values of unity or more in the 300 - 500 K temperature range and thus be suitable for cooling and moderate temperature waste heat recovery and thermoelectric solar cell applications. Central to this conclusion are the larger band gap and the relatively heavier valence bands of Bi2Se3.

  9. Nanocrystalline silicon: Lattice dynamics and enhanced thermoelectric properties

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Claudio, Tania; Stein, Niklas; Stroppa, Daniel G.; Klobes, Benedikt; Koza, Michael Marek; Kudejova, Petra; Petermann, Nils; Wiggers, Hartmut; Schierning, Gabi; Hermann, Raphaël P.

    2014-12-21

    In this study, silicon has several advantages when compared to other thermoelectric materials, but until recently it was not used for thermoelectric applications due to its high thermal conductivity, 156 W K-1 m-1 at room temperature. Nanostructuration as means to decrease thermal transport through enhanced phonon scattering has been a subject of many studies. In this work we have evaluated the effects of nanostructuration on the lattice dynamics of bulk nanocrystalline doped silicon. The samples were prepared by gas phase synthesis, followed by current and pressure assisted sintering. The heat capacity, density of phonons states, and elastic constants were measured,more »which all reveal a significant, ?25%, reduction in the speed of sound. The samples present a significantly decreased lattice thermal conductivity, ?25 W K-1 m-1, which, combined with a very high carrier mobility, results in a dimensionless figure of merit with a competitive value that peaks at ZT ? 0.57 at 973 °C. Due to its easily scalable and extremely low-cost production process, nanocrystalline Si prepared by gas phase synthesis followed by sintering could become the material of choice for high temperature thermoelectric generators.« less

  10. Nanocrystalline silicon: lattice dynamics and enhanced thermoelectric properties

    SciTech Connect (OSTI)

    Claudio, Tania; Stein, Niklas; Stroppa, Daniel G.; Klobes, Benedikt; Koza, Michael Marek; Kudejova, Petra; Petermann, Nils; Wiggers, Hartmut; Schierning, Gabi; Hermann, Raphaël P.

    2014-12-21

    Silicon has several advantages when compared to other thermoelectric materials, but until recently it was not used for thermoelectric applications due to its high thermal conductivity, 156 W K-1 m-1 at room temperature. Nanostructuration as means to decrease thermal transport through enhanced phonon scattering has been a subject of many studies. In this work we have evaluated the effects of nanostructuration on the lattice dynamics of bulk nanocrystalline doped silicon. The samples were prepared by gas phase synthesis, followed by current and pressure assisted sintering. The heat capacity, density of phonons states, and elastic constants were measured, which all reveal a significant, ?25%, reduction in the speed of sound. The samples present a significantly decreased lattice thermal conductivity, ?25 W K-1 m-1, which, combined with a very high carrier mobility, results in a dimensionless figure of merit with a competitive value that peaks at ZT ? 0.57 at 973 °C. Due to its easily scalable and extremely low-cost production process, nanocrystalline Si prepared by gas phase synthesis followed by sintering could become the material of choice for high temperature thermoelectric generators.

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

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

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

  12. Electrical and Thermoelectrical Transport Properties of Graphene

    E-Print Network [OSTI]

    Wang, Deqi

    2011-01-01

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

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

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

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

  14. Thermoelectric Materials by Design: Computational Theory and...

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

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

  15. 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...

  16. Thermoelectric Activities of European Community within Framework...

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

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

  17. 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....

  18. 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...

  19. 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...

  20. Thermoelectric Power Generation System with Loop Thermosyphon...

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

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

  1. Proactive Strategies for Designing Thermoelectric Materials for...

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

    New p-type and n-type multiple-rattler skutterudite thermoelectric materials design, synthesis, fabrication, and characterization for power generation using vehicle exhaust waste...

  2. 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...

  3. Internal-integral sodium return line for sodium heat engine

    DOE Patents [OSTI]

    Hunt, Thomas K. (Ann Arbor, MI)

    1985-01-01

    A thermoelectric generator device which converts heat energy to electrical energy. An alkali metal is used with a solid electrolyte and a portion of the return line for the alkali metal is located within the generator vacuum space.

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

    E-Print Network [OSTI]

    Norwood, Zachary Mills

    2011-01-01

    Performance-Cost analysis of solar combined heat and powerCHP system where the solar field cost is split between thea predicted levelized solar thermal cost of $0.03/kWh, this

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

    E-Print Network [OSTI]

    Norwood, Zachary Mills

    2011-01-01

    2009, May). Solar heat worldwide: Markets and contributionis a large proven market for solar energy. With widespreadSolar Rankine thermodynamics matches California demand To get a first approximation of the market

  6. Miniature thermo-electric cooled cryogenic pump

    DOE Patents [OSTI]

    Keville, Robert F. (Valley Springs, CA)

    1997-01-01

    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.

  7. Miniature thermo-electric cooled cryogenic pump

    DOE Patents [OSTI]

    Keville, R.F.

    1997-11-18

    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.

  8. Synthesis and Characterization of Iridium- and Cobalt-based Skutterudites for Thermoelectric Power Generation

    E-Print Network [OSTI]

    King, Daniel Jay

    2014-01-01

    for thermoelectric power generation,” 235th ACS Nationalfor Thermoelectric Power Generation A dissertation submittedfor Thermoelectric Power Generation by Daniel Jay King, Jr.

  9. Thermoelectric and electrical characterization of Si nanowires and GaNAs

    E-Print Network [OSTI]

    Pichanusakorn, Paothep

    2012-01-01

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

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

    E-Print Network [OSTI]

    2010-01-01

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

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

    E-Print Network [OSTI]

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

    2015-01-01

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

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

    E-Print Network [OSTI]

    Martin, Alain

    to solid-state operation, and reduced size. Additionally, thermoelectrics do not use green- house gas

  13. Improving Energy Efficiency by Developing Components for Distributed Cooling and Heating Based on Thermal Comfort Modeling

    Office of Energy Efficiency and Renewable Energy (EERE)

    Develop distributed HVAC components to supplement the central HVAC system to reduce the energy required by current compressed gas air conditioners by at least one-third.

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

    E-Print Network [OSTI]

    Norwood, Zachary Mills

    2011-01-01

    renewable and non-renewable energy systems including its global warming potential (potential for deep market penetration of renewable distributed energy

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

    E-Print Network [OSTI]

    Norwood, Zachary Mills

    2011-01-01

    12] Kalogirou, S. A. (2004). Solar thermal collectors andD. (2004). Advances in solar thermal electricity technology.December). Distributed solar-thermal/electric generation.

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

    E-Print Network [OSTI]

    Norwood, Zachary Mills

    2011-01-01

    Potential, and Water for Distributed Concentrating Solarconcentrating solar has the potential for significantscenarios evaluate the potential for solar-thermal serving

  17. Using Thermally-Degrading, Partitioning, and Nonreactive Tracers to Determine Temperature Distribution and Fracture/Heat Transfer Surface Area in Geothermal Reservoirs

    Broader source: Energy.gov [DOE]

    DOE Geothermal Peer Review 2010 - Project Summary. The goal of this project is to provide integrated tracer and tracer interpretation tools to facilitate quantitative characterization of temperature distributions and surface area available for heat transfer in EGS.

  18. Nanostructures having high performance thermoelectric properties

    DOE Patents [OSTI]

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

    2015-12-22

    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.

  19. Nanostructures having high performance thermoelectric properties

    DOE Patents [OSTI]

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

    2014-05-20

    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.

  20. Wireless RF Distribution in Buildings using Heating and Ventilation Ducts Christopher P. Diehl, Benjamin E. Henty, Nikhil Kanodia, and Daniel D. Stancil

    E-Print Network [OSTI]

    Stancil, Daniel D.

    Wireless RF Distribution in Buildings using Heating and Ventilation Ducts Christopher P. Diehl in buildings is proposed in which the heating and ventilation ducts are used as waveguides. Because to a lower-cost system. Initial experimental results are presented that demonstrate duct-assisted propagation

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

    E-Print Network [OSTI]

    Norwood, Zachary Mills

    2011-01-01

    in solar thermal electricity technology. Solar Energy 76(1-solar energy is ubiquitous, and valuable when converted to high-grade heat or electricity.electricity in a natural gas, coal or nuclear power plant can instead harness solar energy

  2. The Well-Group Distribution of Groundwater Source Heat Pump System Optimized Research 

    E-Print Network [OSTI]

    Liu, Z.; Lu, L.; Yoshida, H.

    2006-01-01

    It is the key question that how does the well group arrange for application of GWSHP system. Based on the fact that the water movement is the important factor of heat transfer on aquifer, this paper presents two steps analysis method and analyze...

  3. Increasing thermoelectric efficiency towards the Carnot limit

    E-Print Network [OSTI]

    Giulio Casati; Carlos Mejia-Monasterio; Tomaz Prosen

    2008-02-27

    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.

  4. Investigation of detailed film cooling effectiveness and heat transfer distributions on a gas turbine airfoil

    SciTech Connect (OSTI)

    Drost, U.; Boelcs, A. [Swiss Federal Inst. of Tech., Lausanne (Switzerland)

    1999-04-01

    In the present study film cooling effectiveness and heat transfer were systematically investigated on a turbine NGV airfoil employing the transient liquid crystal technique and a multiple regression procedure. Tests were conducted in a linear cascade at exit Reynolds numbers of 0.52e6, 1.02e6 and 1.45e6 and exit Mach numbers of 0.33, 0.62 and 0.8, at two mainstream turbulence intensities of 5.5 and 10%. The film cooling geometry consisted of a single compound angle row on the pressure side (PS), and a single or a double row on the suction side (SS). Foreign gas injection was used to obtain a density ratio of approximately 1.65, while air injection yielded a density ratio of unity. Tests were conducted for blowing ratios of 0.25 to 2.3 on the SS, and 0.55 to 7.3 on the PS. In general film cooling injection into a laminar BL showed considerably higher effectiveness in the near-hole region, as compared to a turbulent BL. While mainstream turbulence had only a weak influence on SS cooling, higher effectiveness was noted on the PS at high turbulence due to increased lateral spreading of the coolant. Effects of mainstream Mach and Reynolds number were attributed to changes of the BL thickness and flow acceleration. Higher density coolant yielded higher effectiveness on both SS and PS, whereas heat transfer ratios were increased on the SS and decreased on the PS. Comparison of the single and double row cooling configurations on the SS revealed a better film cooling performance of the double row due to an improved film coverage and delayed jet separation.

  5. Thermoelectrics : material advancements and market applications

    E-Print Network [OSTI]

    Monreal, Jorge

    2007-01-01

    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 ...

  6. Solar thermoelectrics for small scale power generation

    E-Print Network [OSTI]

    Amatya, Reja

    2012-01-01

    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 ...

  7. Generalized drift-diffusion for microscopic thermoelectricity

    E-Print Network [OSTI]

    Santhanam, Parthiban

    2009-01-01

    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 ...

  8. Device testing and characterization of thermoelectric nanocomposites

    E-Print Network [OSTI]

    Muto, Andrew (Andrew Jerome)

    2008-01-01

    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 ...

  9. Photoacoustic measurement of bandgaps of thermoelectric materials

    E-Print Network [OSTI]

    Ni, George (George Wei)

    2014-01-01

    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 ...

  10. Modeling water use at thermoelectric power plants

    E-Print Network [OSTI]

    Rutberg, Michael J. (Michael Jacob)

    2012-01-01

    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 ...

  11. 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 ...

  12. Probing thermoelectric transport with cold atoms

    E-Print Network [OSTI]

    Charles Grenier; Corinna Kollath; Antoine Georges

    2013-11-10

    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.

  13. Heat engine and electric motor torque distribution strategy for a hybrid electric vehicle

    DOE Patents [OSTI]

    Boberg, Evan S. (Hazel Park, MI); Gebby, Brian P. (Hazel Park, MI)

    1999-09-28

    A method is provided for controlling a power train system for a hybrid electric vehicle. The method includes a torque distribution strategy for controlling the engine and the electric motor. The engine and motor commands are determined based upon the accelerator position, the battery state of charge and the amount of engine and motor torque available. The amount of torque requested for the engine is restricted by a limited rate of rise in order to reduce the emissions from the engine. The limited engine torque is supplemented by motor torque in order to meet a torque request determined based upon the accelerator position.

  14. Influence of germanium nano-inclusions on the thermoelectric power factor of bulk bismuth telluride alloy

    SciTech Connect (OSTI)

    Satyala, Nikhil; Zamanipour, Zahra; Norouzzadeh, Payam; Krasinski, Jerzy S.; Vashaee, Daryoosh, E-mail: daryoosh.vashaee@okstate.edu [School of Electrical and Computer Engineering, Helmerich Advanced Technology Research Center, Oklahoma State University, Tulsa, Oklahoma 74106 (United States); Tahmasbi Rad, Armin [School of Material Science and Engineering, Helmerich Advanced Technology Research Center, Oklahoma State University, Tulsa, Oklahoma 74106 (United States); Tayebi, Lobat, E-mail: daryoosh.vashaee@okstate.edu [School of Chemical Engineering, Oklahoma State University, Stillwater, Oklahoma 74078 (United States)

    2014-05-28

    Nanocomposite thermoelectric compound of bismuth telluride (Bi{sub 2}Te{sub 3}) with 5 at. % germanium nano-inclusions was prepared via mechanically alloying and sintering techniques. The influence of Ge nano-inclusions and long duration annealing on the thermoelectric properties of nanostructured Bi{sub 2}Te{sub 3} were investigated. It was found that annealing has significant effect on the carrier concentration, Seebeck coefficient, and the power factor of the thermoelectric compound. The systematic heat treatment also reduced the density of donor type defects thereby decreasing the electron concentration. While the as-pressed nanocomposite materials showed n-type properties, it was observed that with the increase of annealing time, the nanocomposite gradually transformed to an abundantly hole-dominated (p-type) sample. The long duration annealing (?500 h) resulted in a significantly enhanced electrical conductivity pertaining to the augmentation in the density and the structural properties of the sample. Therefore, a simultaneous enhancement in both electrical and Seebeck coefficient characteristics resulted in a remarkable increase in the thermoelectric power factor.

  15. Segregated Network Polymer-Carbon Nanotubes Composites For Thermoelectrics 

    E-Print Network [OSTI]

    Kim, Dasaroyong

    2010-10-12

    Polymers are intrinsically poor thermal conductors, which are ideal for thermoelectrics, but low electrical conductivity and thermopower have excluded them as feasible candidates as thermoelectric materials in the past. However, recent progress...

  16. Engineering Enhanced Thermoelectric Properties in Zigzag Graphene Nanoribbons

    E-Print Network [OSTI]

    Engineering Enhanced Thermoelectric Properties in Zigzag Graphene Nanoribbons Hossein Karamitaheri1 graphene nanoribbons in the presence of extended line defects, substrate impurities and edge roughness of highly efficient nanostructured graphene nanoribbon based thermoelectric devices. PACS numbers: 72.80.Vp

  17. Synthesis and physical characterization of thermoelectric single crystals

    E-Print Network [OSTI]

    Porras Pérez Guerrero, Juan Pablo

    2012-01-01

    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] ...

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

    SciTech Connect (OSTI)

    Henry DeLima; Joe Akin; Joseph Pietsch

    2008-09-14

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

  19. Three-dimensional multimodal imaging and analysis of biphasic microstructure in a Ti-Ni-Sn thermoelectric material

    E-Print Network [OSTI]

    Douglas, Jason E; Echlin, McLean P; Lenthe, William C; Seshadri, Ram; Pollock, Tresa M

    2015-01-01

    microstructure in a Ti–Ni–Sn thermoelectric material Jasonsolid-state option. Thermoelectric materials, which convertin biphasic hH- based thermoelectric materials. This work

  20. An electrochemical system for efficiently harvesting low-grade heat energy

    E-Print Network [OSTI]

    Lee, Seok Woo

    Efficient and low-cost thermal energy-harvesting systems are needed to utilize the tremendous low-grade heat sources. Although thermoelectric devices are attractive, its efficiency is limited by the relatively low ...

  1. 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

  2. Thermoelectric-enhanced, liquid-based cooling of a multi-component electronic system

    DOE Patents [OSTI]

    Chainer, Timothy J; Graybill, David P; Iyengar, Madhusudan K; Kamath, Vinod; Kochuparambil, Bejoy J; Schmidt, Roger R; Steinke, Mark E

    2015-05-12

    Apparatus and method are provided for facilitating cooling of an electronic component. The apparatus includes a liquid-cooled structure, a thermal conduction path coupling the electronic component and the liquid-cooled structure, a coolant loop in fluid communication with a coolant-carrying channel of the liquid-cooled structure, and an outdoor-air-cooled heat exchange unit coupled to facilitate heat transfer from the liquid-cooled structure via, at least in part, the coolant loop. The thermoelectric array facilitates transfer of heat from the electronic component to the liquid-cooled structure, and the heat exchange unit cools coolant passing through the coolant loop by dissipating heat from the coolant to outdoor ambient air. In one implementation, temperature of coolant entering the liquid-cooled structure is greater than temperature of the outdoor ambient air to which heat is dissipated.

  3. Thermoelectric-enhanced, liquid-based cooling of a multi-component electronic system

    DOE Patents [OSTI]

    Chainer, Timothy J; Graybill, David P; Iyengar, Madhusudan K; Kamath, Vinod; Kochuparambil, Bejoy J; Schmidt, Roger R; Steinke, Mark E

    2015-11-10

    Methods are provided for facilitating cooling of an electronic component. The methods include providing: a liquid-cooled structure, a thermal conduction path coupling the electronic component and the liquid-cooled structure, a coolant loop in fluid communication with a coolant-carrying channel of the liquid-cooled structure, and an outdoor-air-cooled heat exchange unit coupled to facilitate heat transfer from the liquid-cooled structure via, at least in part, the coolant loop. The thermoelectric array facilitates transfer of heat from the electronic component to the liquid-cooled structure, and the heat exchange unit cools coolant passing through the coolant loop by dissipating heat from the coolant to outdoor ambient air. In one implementation, temperature of coolant entering the liquid-cooled structure is greater than temperature of the outdoor ambient air to which heat is dissipated.

  4. Sputter deposition of multilayer thermoelectric films: An approach to the fabrication of two-dimensional quantum wells

    SciTech Connect (OSTI)

    Farmer, J.C.; Barbee, T.W. Jr.; Chapline, G.C. Jr.; Foreman, R.J.; Summers, L.J. [Lawrence Livermore National Lab., CA (United States); Dresselhaus, M.S.; Hicks, L.D. [Massachusetts Institute of Technology, Boston, MA (United States). Dept. of Physics

    1994-07-01

    The relative efficiency of a thermoelectric material is measured in terms of a dimensionless figure of merit, ZT. Though all known thermoelectric materials are believed to have ZT{le}1, recent theoretical results predict that thermoelectric devices fabricated as two-dimensional quantum wells (2D QWs) or onedimensional (1D) quantum wires could have ZT{ge}3. Multilayers with the dimensions of 2D QWs have been synthesized by alternately sputtering Bi{sub 0.9}Sb{sub 0.1} and PbTe{sub 0.8}Se{sub 0.2} onto a moving single-crystal sapphire substrate from dual magnetrons. These materials have been used to test the thermoelectric quantum-well concept and gain insight into relevant transport mechanisms. If successful, this research could lead to thermoelectric devices that have efficiencies close to that of an ideal Carnot engine. Ultimately, such devices could be used to replace conventional heat engines and mechanical refrigeration systems.

  5. Solar Thermoelectric Generators (STEG) Dr. HoSung Lee

    E-Print Network [OSTI]

    Lee, Ho Sung

    Solar Thermoelectric Generators (STEG) Dr. HoSung Lee Western Michigan University Mechanical;#12;· Kraemer et al. (2011) · 1 sun · t = 0.94, a = 0.95, e = 0.05 · q" = 1000 W/m^2, Cth = 299 · Thermoelectric;Baranowski, Snyder, Tober (2012) #12;Baranowski, Snyder, Tober (2012) Reduced current density Thermoelectric

  6. 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

  7. Thermoelectric performance of silicon nanowires Gang Zhang,1,a

    E-Print Network [OSTI]

    Li, Baowen

    Thermoelectric performance of silicon nanowires Gang Zhang,1,a Qingxin Zhang,1 Cong-Tinh Bui,2 Guo, the thermoelectric performance of silicon nanowires SiNWs is studied. Large cooling temperature is observed which.6 103 W/cm2 is achieved which is about 600 times larger than that of commercial thermoelectric modules

  8. 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

  9. 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

  10. 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

  11. 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

  12. Disorder enhances thermoelectric figure of merit in armchair graphane nanoribbons

    E-Print Network [OSTI]

    Li, Baowen

    Disorder enhances thermoelectric figure of merit in armchair graphane nanoribbons Xiaoxi Ni,1 2009; accepted 20 October 2009; published online 13 November 2009 We study the thermoelectric property-based materials a viable choice for thermoelectric applications. © 2009 American Institute of Physics. doi:10

  13. 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

  14. Coupled QuantumCoupled Quantum--ScatteringScattering Modeling of the ThermoelectricModeling of the Thermoelectric

    E-Print Network [OSTI]

    Walker, D. Greg

    Coupled QuantumCoupled Quantum--ScatteringScattering Modeling of the ThermoelectricModeling of the Thermoelectric Properties of Si/Ge/SiProperties of Si/Ge/Si Quantum Well SuperlatticesQuantum Well Superlattices Phonons Si SiGe 2 S T ZT = · Quantum well superlattices proposed to improve thermoelectric figure

  15. Thermoelectric DC conductivities with momentum dissipation from higher derivative gravity

    E-Print Network [OSTI]

    Long Cheng; Xian-Hui Ge; Zu-Yao Sun

    2015-04-28

    We present a mechanism of momentum relaxation in higher derivative gravity by adding linear scalar fields to the Gauss-Bonnet theory. We analytically computed all of the DC thermoelectric conductivities in this theory by adopting the method given by Donos and Gauntlett in [arXiv:1406.4742]. The results show that the DC electric conductivity is not a monotonic function of the effective impurity parameter $\\beta$: in the small $\\beta$ limit, the DC conductivity is dominated by the coherent phase, while for larger $\\beta$, pair creation contribution to the conductivity becomes dominant, signaling an incoherent phase. In addition, the DC heat conductivity is found independent of the Gauss-Bonnet coupling constant.

  16. MoS2 Nanoribbons Thermoelectric Generators

    E-Print Network [OSTI]

    Arab, Abbas

    2015-01-01

    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.

  17. A numerical study of local heat transfer and velocity distributions between blockages with holes in a rectangular channel 

    E-Print Network [OSTI]

    Lee, Sang Won

    2002-01-01

    influence the velocity profiles, therefore, the heat transfer performance. Location of the hole of the upstream blockage significantly changes the velocity profiles; therefore, heat transfer results. The jets through the holes of the upstream blockage...

  18. ITP Industrial Distributed Energy: Combined Heat & Power Multifamily Performance Program-- Sea Park East 150 kW CHP System

    Broader source: Energy.gov [DOE]

    Overview of Sea Park East 150 kilowatt (kW) Combined Heat and Power (CHP) System in Brooklyn, New York

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

    DOE Patents [OSTI]

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

    2013-05-21

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

  20. Method of operating a thermoelectric generator

    DOE Patents [OSTI]

    Reynolds, Michael G; Cowgill, Joshua D

    2013-11-05

    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.

  1. Evaluation on double-wall-tube residual stress distribution of sodium-heated steam generator by neutron diffraction and numerical analysis

    SciTech Connect (OSTI)

    Kisohara, N. [Advanced Nuclear System Research and Development Directorate, Japan Atomic Energy Agency (Japan); Suzuki, H.; Akita, K. [Quantum Beam Science Directorate, Japan Atomic Energy Agency (Japan); Kasahara, N. [Dept. of Nuclear Engineering and Management, Univ. of Tokyo (Japan)

    2012-07-01

    A double-wall-tube is nominated for the steam generator heat transfer tube of future sodium fast reactors (SFRs) in Japan, to decrease the possibility of sodium/water reaction. The double-wall-tube consists of an inner tube and an outer tube, and they are mechanically contacted to keep the heat transfer of the interface between the inner and outer tubes by their residual stress. During long term SG operation, the contact stress at the interface gradually falls down due to stress relaxation. This phenomenon might increase the thermal resistance of the interface and degrade the tube heat transfer performance. The contact stress relaxation can be predicted by numerical analysis, and the analysis requires the data of the initial residual stress distributions in the tubes. However, unclear initial residual stress distributions prevent precious relaxation evaluation. In order to resolve this issue, a neutron diffraction method was employed to reveal the tri-axial (radius, hoop and longitudinal) initial residual stress distributions in the double-wall-tube. Strain gauges also were used to evaluate the contact stress. The measurement results were analyzed using a JAEA's structural computer code to determine the initial residual stress distributions. Based on the stress distributions, the structural computer code has predicted the transition of the relaxation and the decrease of the contact stress. The radial and longitudinal temperature distributions in the tubes were input to the structural analysis model. Since the radial thermal expansion difference between the inner (colder) and outer (hotter) tube reduces the contact stress and the tube inside steam pressure contributes to increasing it, the analytical model also took these effects into consideration. It has been conduced that the inner and outer tubes are contacted with sufficient stresses during the plant life time, and that effective heat transfer degradation dose not occur in the double-wall-tube SG. (authors)

  2. Alkaline earth filled nickel skutterudite antimonide thermoelectrics

    DOE Patents [OSTI]

    Singh, David Joseph

    2013-07-16

    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.

  3. Two-dimensional model of the air flow and temperature distribution in a cavity-type heat receiver of a solar stirling engine

    SciTech Connect (OSTI)

    Makhkamov, K.K.; Ingham, D.B.

    1999-11-01

    A theoretical study on the air flow and temperature in the heat receiver, affected by free convection, of a Stirling Engine for a Dish/Stirling Engine Power System is presented. The standard {kappa}-{epsilon} turbulence model for the fluid flow has been used and the boundary conditions employed were obtained using a second level mathematical model of the Stirling Engine working cycle. Physical models for the distribution of the solar insolation from the Concentrator on the bottom and side walls of the cavity-type heat receiver have been taken into account. The numerical results show that most of the heat losses in the receiver are due to re-radiation from the cavity and conduction through the walls of the cavity. It is in the region of the boundary of the input window of the heat receiver where there is a sensible reduction in the temperature in the shell of the heat exchangers and this is due to the free convection of the air. Further, the numerical results show that convective heat losses increase with decreasing tilt angle.

  4. 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)

    1987-12-22

    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.

  5. Molybdenum oxide electrodes for thermoelectric generators

    DOE Patents [OSTI]

    Schmatz, Duane J. (Dearborn Heights, MI)

    1989-01-01

    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.

  6. 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

    2010-12-14

    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.

  7. The Theory of Thermal, Thermoelectric and Electrical Transport Properties of Graphene

    E-Print Network [OSTI]

    Ugarte, Vincent Ike

    2010-01-01

    In Boltzmann theory of transport the electrical conductivityThe Theory of Thermal, Thermoelectric and ElectricalThe Theory of Thermal, Thermoelectric and Electrical

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

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

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

  9. Improved thermoelectric power output from multilayered polyethylenimine doped carbon nanotube based organic composites

    SciTech Connect (OSTI)

    Hewitt, Corey A.; Montgomery, David S.; Barbalace, Ryan L.; Carlson, Rowland D.; Carroll, David L., E-mail: carroldl@wfu.edu [Center for Nanotechnology and Molecular Materials, Wake Forest University, 501 Deacon Blvd., Winston Salem, North Carolina 27105 (United States)

    2014-05-14

    By appropriately selecting the carbon nanotube type and n-type dopant for the conduction layers in a multilayered carbon nanotube composite, the total device thermoelectric power output can be increased significantly. The particular materials chosen in this study were raw single walled carbon nanotubes for the p-type layers and polyethylenimine doped single walled carbon nanotubes for the n-type layers. The combination of these two conduction layers leads to a single thermocouple Seebeck coefficient of 96 ± 4??VK{sup ?1}, which is 6.3 times higher than that previously reported. This improved Seebeck coefficient leads to a total power output of 14.7 nW per thermocouple at the maximum temperature difference of 50?K, which is 44 times the power output per thermocouple for the previously reported results. Ultimately, these thermoelectric power output improvements help to increase the potential use of these lightweight, flexible, and durable organic multilayered carbon nanotube based thermoelectric modules in low powered electronics applications, where waste heat is available.

  10. Distributed Energy Resources for Carbon Emissions Mitigation

    E-Print Network [OSTI]

    Firestone, Ryan; Marnay, Chris

    2008-01-01

    carbon tax, combined heat and power, distributed energyuseful heat in combined heat and power systems, thermally-fossil-fuel based combined heat and power (CHP), thermally-

  11. New nano structure approaches for bulk thermoelectric materials

    E-Print Network [OSTI]

    Kim, Jeonghoon

    2010-01-01

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

  12. Modeling and Optimization of Hybrid Solar Thermoelectric Systems...

    Office of Scientific and Technical Information (OSTI)

    Journal Article: Modeling and Optimization of Hybrid Solar Thermoelectric Systems with Thermosyphons Citation Details In-Document Search Title: Modeling and Optimization of Hybrid...

  13. Thermoelectrics Combined with Solar Concentration for Electrical and Thermal Cogeneration

    E-Print Network [OSTI]

    Jackson, Philip Robert

    2012-01-01

    and thermoelectric power generation. Energy Conversion &assembled for optimal power generation and system efficiencySeebeck Voltage. The power generation efficiency will reach

  14. 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...

  15. 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...

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

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

    Are First to Measure Thermoelectric Behavior of a Nanoporous Metal-Organic Framework Home Energy Transportation Energy CRF Office of Science Facilities Capabilities News Energy...

  17. 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...

  18. Nano-structures Thermoelectric Materals - Part 1 | Department...

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

    1 Nano-structures Thermoelectric Materals - Part 1 2002 DEER Conference Presentation: RTI International 2002deervenkatasubramanian1.pdf More Documents & Publications...

  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 2012 DOE...

  20. 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...

  1. 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...

  2. High Reliability, High TemperatureThermoelectric Power Generation...

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

    and Technologies Key technologies and system approaches to excellent record of thermoelectric power sources in deep space missions and development of higher performance TE...

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

    Broader source: Energy.gov [DOE]

    Presents successful incorporation of one of the most promising classes of the new materials, the skutterudites, into a working automotive TEG prototype and test results on its performance

  4. Develop Thermoelectric Technology for Automotive Waste Heat Recovery

    Broader source: Energy.gov [DOE]

    Presentation given at DEER 2006, August 20-24, 2006, Detroit, Michigan. Sponsored by the U.S. DOE's EERE FreedomCar and Fuel Partnership and 21st Century Truck Programs.

  5. Thermoelectric Generator Development for Automotive Waste Heat Recovery

    Broader source: Energy.gov [DOE]

    Presentation given at the 16th Directions in Engine-Efficiency and Emissions Research (DEER) Conference in Detroit, MI, September 27-30, 2010.

  6. Nanoscale heat conduction with applications in nanoelectronics and thermoelectrics

    E-Print Network [OSTI]

    Yang, Ronggui, Ph. D. Massachusetts Institute of Technology

    2006-01-01

    When the device or structure characteristic length scales are comparable to the mean free path and wavelength of energy carriers (electrons, photons, phonons, and molecules) or the time of interest is on the same order as ...

  7. Development of Thermoelectric Technology for Automotive Waste Heat Recovery

    Broader source: Energy.gov [DOE]

    Presentation from the U.S. DOE Office of Vehicle Technologies "Mega" Merit Review 2008 on February 25, 2008 in Bethesda, Maryland.

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

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

    the most promising classes of the new materials, the skutterudites, into a working automotive TEG prototype and test results on its performance deer11meisner.pdf More Documents...

  9. Thermoelectric Waste Heat Recovery Program for Passenger Vehicles

    Broader source: Energy.gov [DOE]

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

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

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

    10 DOE Vehicle Technologies and Hydrogen Programs Annual Merit Review and Peer Evaluation Meeting, June 7-11, 2010 -- Washington D.C. ace049schock2010o...

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

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

    09 DOE Hydrogen Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting, May 18-22, 2009 -- Washington D.C. ace46schock...

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

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann Jackson About UsEnergyof Energy MaturationColoring and Activity BookCombinedDepartment

  13. Skutterudite Thermoelectric Generator For Automotive Waste Heat Recovery |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankADVANCED MANUFACTURINGEnergy BillsNo.Hydrogen4 » SearchwithSimulationPlan GuidanceProductionDepartment

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

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankADVANCED MANUFACTURINGEnergyPlan | Department of Energy 1 DOE HydrogenDepartmentStatus ofMarilyn

  15. An Overview of Thermoelectric Waste Heat Recovery Activities in Europe |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:FinancingPetroleum Based Fuels Research at 1 Table of ContentsAn Overview of NREL's Online

  16. Enhancement of automotive exhaust heat recovery by thermoelectric devices

    Office of Scientific and Technical Information (OSTI)

    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 Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfate Reducing(Journal Article) | SciTech(Journal(Patent) |(Journal Article) |nanoparticles

  17. Develop Thermoelectric Technology for Automotive Waste Heat Recovery |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:FinancingPetroleum Based| Department8, 20153DanielthroughDetermining PriceAbuse

  18. Develop Thermoelectric Technology for Automotive Waste Heat Recovery |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:FinancingPetroleum Based| Department8, 20153DanielthroughDetermining PriceAbuseDepartment of

  19. Develop Thermoelectric Technology for Automotive Waste Heat Recovery |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:FinancingPetroleum Based| Department8, 20153DanielthroughDetermining PriceAbuseDepartment

  20. Development of Marine Thermoelectric Heat Recovery Systems | Department of

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:FinancingPetroleum Based| Department8,Department of Energy 1Energy 1ofExceeding 500Wh/L

  1. Development of Marine Thermoelectric Heat Recovery Systems | Department of

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:FinancingPetroleum Based| Department8,Department of Energy 1Energy 1ofExceeding

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

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:FinancingPetroleum12,ExecutiveFinancing ProgramsDepartment of¡ ¢HelpHighJian Li,1 DOEFuel

  3. Thermoelectric Waste Heat Recovery Program for Passenger Vehicles |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankADVANCEDInstallers/ContractorsPhotovoltaicsState ofSavings for Specific2 DOE Hydrogen and

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

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankADVANCEDInstallers/ContractorsPhotovoltaicsState ofSavings for Specific2 DOE HydrogenScalable

  5. 3D Temperature distribution and numerical modeling of heat transfers in an active fault zone: Eugene Island 330, Offshore Louisiana.

    E-Print Network [OSTI]

    Guerin, Gilles

    hydrocarbons by migration of fluids from overpressured shales upwards along the active fault system. The heat field in the Northern Gulf of Mexico (Figure 4.1) has been the focus of an unprecedented

  6. 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

    2013-01-01

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

  7. A quantitative application of the thermoelectric method for measuring water uptake by cotton plants 

    E-Print Network [OSTI]

    Naghshineh-Pour, Bahman

    1965-01-01

    they measured sap veloc- ties in intact plants with a minimum of injury (8). Dixon (9) measured flow rates in a branch of a young ash tree by using a thermocouple arrangement for detecting heat f'low. His results indicated mass flow in the stem both upward... oxy- gen and carbon dioxide levels within the soil could be detected. The thermoelectric method is based on the assumption that since Personal Communication. most of the water absorbed by plants is transpired, the rate of sap flow in the stem is a...

  8. Synthesis and evaluation of thermoelectric multilayer films

    SciTech Connect (OSTI)

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

    1996-03-21

    The deposition of compositionally modulated (Bi{sub 1-x}Sb{sub x}){sub 2}(Te{sub 1-y}Se{sub y}){sub 3} thermoelectric multilayer films by magnetron sputtering has been demonstrated. Structures with a period of 140{Angstrom} are shown to be stable to interdiffusion at the high deposition temperatures necessary for growth of single layer crystalline films with ZT {gt} 0.5. These multilayers are of the correct dimension to exhibit the electronic properties of quantum well structures. Furthermore it is shown that the Seebeck coefficient of the films is not degraded by the presence of this multilayer structure. It may be possible to synthesize a multilayer thermoelectric material with enhanced ZT by maximizing the barrier height through optimization of the composition of the barrier.

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

    E-Print Network [OSTI]

    Fong, Anthony

    2012-01-01

    Motivation Thermoelectric materials are currently a major interest for their potential applications towards renewable energy

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

    E-Print Network [OSTI]

    1999-01-01

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

  11. 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

  12. High Energy Density Thermal Batteries: Thermoelectric Reactors for Efficient Automotive Thermal Storage

    SciTech Connect (OSTI)

    2011-11-15

    HEATS Project: Sheetak is developing a new HVAC system to store the energy required for heating and cooling in EVs. This system will replace the traditional refrigerant-based vapor compressors and inefficient heaters used in today’s EVs with efficient, light, and rechargeable hot-and-cold thermal batteries. The high energy density thermal battery—which does not use any hazardous substances—can be recharged by an integrated solid-state thermoelectric energy converter while the vehicle is parked and its electrical battery is being charged. Sheetak’s converters can also run on the electric battery if needed and provide the required cooling and heating to the passengers—eliminating the space constraint and reducing the weight of EVs that use more traditional compressors and heaters.

  13. Design and development of thermoelectric generator

    SciTech Connect (OSTI)

    Prem Kumar, D. S. Mahajan, Ishan Vardhan Anbalagan, R. Mallik, Ramesh Chandra

    2014-04-24

    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 %.

  14. New Composite Thermoelectric Materials for Macro-size Applications

    ScienceCinema (OSTI)

    Dresselhaus, Mildred [MIT, Cambridge, Massachusetts, United States

    2010-01-08

    A review will be given of several important recent advances in both thermoelectrics research and industrial thermoelectric applications, which have attracted much attention, increasing incentives for developing advanced materials appropriate for large-scale applications of thermoelectric devices. One promising strategy is the development of materials with a dense packing of random nanostructures as a route for the sacle-up of thermoelectrics applications. The concepts involved in designing composite materials containing nanostructures for thermoelectric applications will be discussed in general terms. Specific application is made to the Bi{sub 2}Te{sub 3} nanocomposite system for use in power generation. Also emphasized are the scientific advantages of the nanocomposite approach for the simultaneous increase in the power factor and decrease of the thermal conductivity, along with the practical advantages of having bulk samples for property measurements and device applications. A straightforward path is identified for the scale-up of thermoelectric materials synthesis containing nanostructured constituents for use in thermoelectric applications. We end with some vision of where the field of thermoelectrics is now heading.

  15. Visualization of effect of turbulators on local heat transfer distribution in a 180 degree turn with liquid crystals 

    E-Print Network [OSTI]

    Rajesh, Gopal

    1994-01-01

    ', and Reynolds numbers of about 10,000 and 38,000. The results are presented as constant Nusselt number lines on the surface of one of the principal walls of the test section. The smooth channel heat transfer around the 180' turn is influenced by flow impingement...

  16. Fuel Cell Power Model Version 2: Startup Guide, System Designs, and Case Studies. Modeling Electricity, Heat, and Hydrogen Generation from Fuel Cell-Based Distributed Energy Systems

    SciTech Connect (OSTI)

    Steward, D.; Penev, M.; Saur, G.; Becker, W.; Zuboy, J.

    2013-06-01

    This guide helps users get started with the U.S. Department of Energy/National Renewable Energy Laboratory Fuel Cell Power (FCPower) Model Version 2, which is a Microsoft Excel workbook that analyzes the technical and economic aspects of high-temperature fuel cell-based distributed energy systems with the aim of providing consistent, transparent, comparable results. This type of energy system would provide onsite-generated heat and electricity to large end users such as hospitals and office complexes. The hydrogen produced could be used for fueling vehicles or stored for later conversion to electricity.

  17. Thulium heat sources for space power applications

    SciTech Connect (OSTI)

    Alderman, C.J.

    1992-05-01

    Reliable power supplies for use in transportation and remote systems will be an important part of space exploration terrestrial activities. A potential power source is available in the rare earth metal, thulium. Fuel sources can be produced by activating Tm-169 targets in the space station reactor. The resulting Tm-170 heat sources can be used in thermoelectric generators to power instrumentation and telecommunications located at remote sites such as weather stations. As the heat source in a dynamic Sterling or Brayton cycle system, the heat source can provide a lightweight power source for rovers or other terrestrial transportation systems.

  18. International Round-Robin Testing of Bulk Thermoelectrics

    SciTech Connect (OSTI)

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

    2011-11-01

    Two international round-robin studies were conducted on transport properties measurements of bulk thermoelectric materials. The study discovered current measurement problems. In order to get ZT of a material four separate transport measurements must be taken. The round-robin study showed that among the four properties Seebeck coefficient is the one can be measured consistently. Electrical resistivity has +4-9% scatter. Thermal diffusivity has similar +5-10% scatter. The reliability of the above three properties can be improved by standardizing test procedures and enforcing system calibrations. The worst problem was found in specific heat measurements using DSC. The probability of making measurement error is great due to the fact three separate runs must be taken to determine Cp and the baseline shift is always an issue for commercial DSC. It is suggest the Dulong Petit limit be always used as a guide line for Cp. Procedures have been developed to eliminate operator and system errors. The IEA-AMT annex is developing standard procedures for transport properties testing.

  19. Thermoelectric energy recovery at ionic-liquid/electrode interface

    E-Print Network [OSTI]

    Marco Bonetti; Sawako Nakamae; Bo Tao Huang; Thomas J. Salez; Cecile Wiertel-Gasquet; Michel Roger

    2015-06-22

    A Thermally Chargeable Capacitor containing a binary solution of 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)-imide (EMIMTFSI) in acetonitrile is electrically charged by applying a tempera- ture gradient to two ideally polarisable electrodes. The corresponding thermoelectric coefficient is -1.7 mV/K for platinum foil electrodes and -0.3 mV/K for nanoporous carbon electrodes. Stored electrical energy is extracted by discharging the capacitor through a resistor. The measured capacitance of the electrode/ionic- liquid interface is 5 micro $\\mu$F for each platinum electrode while it becomes four orders of magnitude larger $\\approx 36$ mF for a single nanoporous carbon electrode. Reproducibility of the effect through repeated charging-discharging cycles under a steady-state temperature gradient demonstrates the robustness of the electrical charging pro- cess at the liquid/electrode interface. The acceleration of the charging by convective flows is also observed. This offers the possibility to convert waste-heat into electric energy without exchanging electrons between ions and electrodes, in contrast to what occurs in most thermogalvanic cells.

  20. Single-step preparation and consolidation of reduced early-transition-metal oxide/metal n-type thermoelectric composites

    E-Print Network [OSTI]

    Gaultois, Michael W; Douglas, Jason E; Sparks, Taylor D; Seshadri, Ram

    2015-01-01

    oxide/metal n-type thermoelectric composites Michael W.here as interesting thermoelectric materials. Numerous2.5 W m ?1 K ?1 . Thermoelectric properties of these n-type

  1. Multilayer thermoelectric films: A strategy for the enhancement of ZT

    SciTech Connect (OSTI)

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

    1995-03-01

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

  2. 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)

    2008-07-08

    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.

  3. Solid state transport-based thermoelectric converter

    DOE Patents [OSTI]

    Hu, Zhiyu

    2010-04-13

    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.

  4. 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

    2015-03-30

    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.

  5. About Industrial Distributed Energy

    Broader source: Energy.gov [DOE]

    The Advanced Manufacturing Office's (AMO's) Industrial Distributed Energy activities build on the success of predecessor DOE programs on distributed energy and combined heat and power (CHP) while...

  6. THE IMPORTANCE OF PHYSICAL MODELS FOR DERIVING DUST MASSES AND GRAIN SIZE DISTRIBUTIONS IN SUPERNOVA EJECTA. I. RADIATIVELY HEATED DUST IN THE CRAB NEBULA

    SciTech Connect (OSTI)

    Temim, Tea; Dwek, Eli, E-mail: tea.temim@nasa.gov [Observational Cosmology Lab, Code 665, NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States)

    2013-09-01

    Recent far-infrared (IR) observations of supernova remnants (SNRs) have revealed significantly large amounts of newly condensed dust in their ejecta, comparable to the total mass of available refractory elements. The dust masses derived from these observations assume that all the grains of a given species radiate at the same temperature, regardless of the dust heating mechanism or grain radius. In this paper, we derive the dust mass in the ejecta of the Crab Nebula, using a physical model for the heating and radiation from the dust. We adopt a power-law distribution of grain sizes and two different dust compositions (silicates and amorphous carbon), and calculate the heating rate of each dust grain by the radiation from the pulsar wind nebula. We find that the grains attain a continuous range of temperatures, depending on their size and composition. The total mass derived from the best-fit models to the observed IR spectrum is 0.019-0.13 M{sub Sun }, depending on the assumed grain composition. We find that the power-law size distribution of dust grains is characterized by a power-law index of 3.5-4.0 and a maximum grain size larger than 0.1 {mu}m. The grain sizes and composition are consistent with what is expected for dust grains formed in a Type IIP supernova (SN). Our derived dust mass is at least a factor of two less than the mass reported in previous studies of the Crab Nebula that assumed more simplified two-temperature models. These models also require a larger mass of refractory elements to be locked up in dust than was likely available in the ejecta. The results of this study show that a physical model resulting in a realistic distribution of dust temperatures can constrain the dust properties and affect the derived dust masses. Our study may also have important implications for deriving grain properties and mass estimates in other SNRs and for the ultimate question of whether SNe are major sources of dust in the Galactic interstellar medium and in external galaxies.

  7. Water Heaters and Hot Water Distribution Systems

    E-Print Network [OSTI]

    Lutz, Jim

    2012-01-01

    distribution system, ground-source heat pump and ground heatdistribution systems, ground-source heat pumps and ground

  8. Aerogel Derived Nanostructured Thermoelectric Materials

    SciTech Connect (OSTI)

    Wendell E Rhine, PI; Dong, Wenting; Greg Caggiano, PM

    2010-10-08

    America’s dependence on foreign sources for fuel represents a economic and security threat for the country. These non renewable resources are depleting, and the effects of pollutants from fuels such as oil are reaching a problematic that affects the global community. Solar concentration power (SCP) production systems offer the opportunity to harness one of the United States’ most under utilized natural resources; sunlight. While commercialization of this technology is increasing, in order to become a significant source of electricity production in the United States the costs of deploying and operating SCP plants must be further reduced. Parabolic Trough SCP technologies are close to meeting energy production cost levels that would raise interest in the technology and help accelerate its adoption as a method to produce a significant portion of the Country’s electric power needs. During this program, Aspen Aerogels will develop a transparent aerogel insulation that can replace the costly vacuum insulation systems that are currently used in parabolic trough designs. During the Phase I program, Aspen Aerogels will optimize the optical and thermal properties of aerogel to meet the needs of this application. These properties will be tested, and the results will be used to model the performance of a parabolic trough HCE system which uses this novel material in place of vacuum. During the Phase II program, Aspen Aerogels will scale up this technology. Together with industry partners, Aspen Aerogels will build and test a prototype Heat Collection Element that is insulated with the novel transparent aerogel material. This new device will find use in parabolic trough SCP applications.

  9. Multilayer thin film thermoelectrics produced by sputtering

    SciTech Connect (OSTI)

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

    1995-06-19

    In this work we explore the possibility of achieving bulk electrical properties in single layer sputter deposited films grown epitaxially on (111) oriented BaF{sub 2} substrates. There are a number of sputter deposition parameters that can be varied in order to optimize the film quality. It is important to understand the effect of varying the deposition temperature, Ar sputtering gas pressure, and the substrate bias. We will consider only Bi and Bi{sub 0.86}Sb{sub 0.14} films in this paper. These materials were chosen since they have the same simple structure, two different band gaps and do not change significantly either in physical or electrical properties with small amounts of cross contamination. We will also present our work on multilayer thermoelectrics made of Bi and Bi{sub 0.86}Sb{sub 0.14} layers. There has been considerable interest in this multilayer structure in the literature. Theoretical calculations of the band structure and interface states of these multilayer structures have been made by Mustafaev and Agassi et al. respectively [6,7]. Experimentally Yoshida et al. have examined similar multilayer structures grown by MBE as well as Bi/Sb multilayer samples in which report an anomalous thermoelectric power [8].

  10. Feasibility of preparing patterned molybdenum coatings on bismuth telluride thermoelectric modules.

    SciTech Connect (OSTI)

    Sarobol, Pylin; Hall, Aaron Christopher; Miller, Stephen Samuel; Knight, Marlene E.; LePage, William S.; Sobczak, Catherine Elizabeth.; Wesolowski, Daniel Edward

    2013-09-01

    Molybdenum electrical interconnects for thermoelectric modules were produced by air plasma spraying a 30%CE%BCm size molybdenum powder through a laser-cut Kapton tape mask. Initial feasibility demonstrations showed that the molybdenum coating exhibited excellent feature and spacing retention (~170%CE%BCm), adhered to bismuth-telluride, and exhibited electrical conductivity appropriate for use as a thermoelectric module interconnect. A design of experiments approach was used to optimize air plasma spray process conditions to produce a molybdenum coating with low electrical resistivity. Finally, a molybdenum coating was successfully produced on a fullscale thermoelectric module. After the addition of a final titanium/gold layer deposited on top of the molybdenum coating, the full scale module exhibited an electrical resistivity of 128%CE%A9, approaching the theoretical resistivity value for the 6mm module leg of 112%CE%A9. Importantly, air plasma sprayed molybdenum did not show significant chemical reaction with bismuth-telluride substrate at the coating/substrate interface. The molybdenum coating microstructure consisted of lamellar splats containing columnar grains. Air plasma sprayed molybdenum embedded deeply (several microns) into the bismuth-telluride substrate, leading to good adhesion between the coating and the substrate. Clusters of round pores (and cracks radiating from the pores) were found immediately beneath the molybdenum coating. These pores are believed to result from tellurium vaporization during the spray process where the molten molybdenum droplets (2623%C2%B0C) transferred their heat of solidification to the substrate at the moment of impact. Substrate cooling during the molybdenum deposition process was recommended to mitigate tellurium vaporization in future studies.

  11. High-Temperature High-Efficiency Solar Thermoelectric Generators

    SciTech Connect (OSTI)

    Baranowski, LL; Warren, EL; Toberer, ES

    2014-03-01

    Inspired by recent high-efficiency thermoelectric modules, we consider thermoelectrics for terrestrial applications in concentrated solar thermoelectric generators (STEGs). The STEG is modeled as two subsystems: a TEG, and a solar absorber that efficiently captures the concentrated sunlight and limits radiative losses from the system. The TEG subsystem is modeled using thermoelectric compatibility theory; this model does not constrain the material properties to be constant with temperature. Considering a three-stage TEG based on current record modules, this model suggests that 18% efficiency could be experimentally expected with a temperature gradient of 1000A degrees C to 100A degrees C. Achieving 15% overall STEG efficiency thus requires an absorber efficiency above 85%, and we consider two methods to achieve this: solar-selective absorbers and thermally insulating cavities. When the TEG and absorber subsystem models are combined, we expect that the STEG modeled here could achieve 15% efficiency with optical concentration between 250 and 300 suns.

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

    E-Print Network [OSTI]

    demand for petroleum and increased reliance on foreign oil. In addition, the typical vapor compression thermoelectric cooling would significantly reduce the demand for petroleum and provide a clean alternative

  13. Controlling microstructure of nanocrystalline thermoelectrics through powder processing

    E-Print Network [OSTI]

    Humphry-Baker, Samuel A

    2014-01-01

    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 ...

  14. A miniaturized mW thermoelectric generator for nw objectives...

    Office of Scientific and Technical Information (OSTI)

    thermoelectric power source that can provide in excess of 450 microW of power in a system size of 4.3cc, for a power density of 107 microWcc, which is denser than any system...

  15. Profiling the Thermoelectric Power of Semiconductor Junctions with

    E-Print Network [OSTI]

    components or hazardous working fluids. Developing new thermoelectric mate- rials with high figures of merit S is governed by local carrier statistics, SThEM allows us to profile precise elec- tronic junction locations

  16. Oxide based thermoelectric materials for large scale power generation

    E-Print Network [OSTI]

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

    2008-01-01

    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 ...

  17. Automotive Thermoelectric Moduleswith Scalable Thermo- and Electro-Mechanical Interfaces

    Broader source: Energy.gov [DOE]

    Interface materials based on carbon nanotubes and metallic alloys, scalable p- and n-type thermoelectrics, materials compatibility for improved reliability, and performance targets for automotive applications are discussed

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

    Broader source: Energy.gov [DOE]

    Test results for low and high temperature thermoelectric generators (TEG) those for a 530-watt BiTe TEG; design and construction of a 100-watt high temperature TEG currently in fabrication.

  19. Diameter dependence of thermoelectric power of semiconducting carbon nanotubes

    E-Print Network [OSTI]

    Hung, Nguyen T.

    We calculate the thermoelectric power (or thermopower) of many semiconducting single wall carbon nanotubes (s-SWNTs) within a diameter range 0.5–1.5 nm by using the Boltzmann transport formalism combined with an extended ...

  20. 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. ...

  1. 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

    2012-04-06

    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.

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

    E-Print Network [OSTI]

    Mayer, Peter (Peter Matthew), 1978-

    2007-01-01

    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 ...

  3. Thermoelectric skutterudite compositions and methods for producing the same

    DOE Patents [OSTI]

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

    2014-11-11

    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.

  4. Thermoelectric generator and method for the fabrication thereof

    DOE Patents [OSTI]

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

    1984-08-01

    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.

  5. Thermoelectric generator and method for the fabrication thereof

    DOE Patents [OSTI]

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

    1987-01-01

    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.

  6. Effect of sintering in ball-milled K{sub 2}Bi{sub 8}Se{sub 13} thermoelectric nano-composites

    SciTech Connect (OSTI)

    Hatzikraniotis, E.; Ioannou, M.; Chrissafis, K.; Chung, D.Y.; Paraskevopoulos, K.M.; Kyratsi, Th.

    2012-09-15

    K{sub 2}Bi{sub 8}Se{sub 13} has many attractive features for thermoelectric applications. Recently, K{sub 2}Bi{sub 8}Se{sub 13}-based nanocomposite materials, consisting of nano-crystalline, micro-crystalline and amorphous phases, have been fabricated based on powder technology techniques. The Seebeck coefficient has been enhanced while the thermal conductivity has been decreased presenting, thus, interesting behavior. The behavior of the materials under heat treatment conditions is now of interest, as the application of sintering process is necessary for the development of thermoelectric modules. In this work, the crystallization of the K{sub 2}Bi{sub 8}Se{sub 13}-based nano-composites is studied using Differential Scanning Calorimetry. The results show that crystallization follows a multiple-step process with different activation energies. The thermoelectric properties are also discussed in the range that crystallization occurs. - Graphical Abstract: {beta}-K{sub 2}Bi{sub 8}Se{sub 13}-based nanocomposites follow a multiple-step crystallization process. Highlights: Black-Right-Pointing-Pointer K{sub 2}Bi{sub 8}Se{sub 13}-based composites consisting of nanocrystalline and amorphous phases. Black-Right-Pointing-Pointer Sintering results multiple-step crystallization with variable activation energies. Black-Right-Pointing-Pointer Thermoelectric properties follow a step-like behavior during sintering. Black-Right-Pointing-Pointer Properties are attributed to the strain relaxation, nucleation and grain growth.

  7. Heat pipe array heat exchanger

    DOE Patents [OSTI]

    Reimann, Robert C. (Lafayette, NY)

    1987-08-25

    A heat pipe arrangement for exchanging heat between two different temperature fluids. The heat pipe arrangement is in a ounterflow relationship to increase the efficiency of the coupling of the heat from a heat source to a heat sink.

  8. Synthesis and Characterization of Magnesium-Silicon and Magnesium-Tin Solid Solutions for Thermoelectric Applications 

    E-Print Network [OSTI]

    Hu, Fang

    2012-07-16

    The environmentally friendly n-type Mg2(Si, Sn) thermoelectric solid solutions have a strong potential of commercial utilization in thermoelectric (TE) energy conversion due to their availability, low density (~3.02 g/cm3), ...

  9. Power and efficiency analysis of a realistic resonant tunneling diode thermoelectric

    SciTech Connect (OSTI)

    Agarwal, Akshay; Muralidharan, Bhaskaran, E-mail: bm@ee.iitb.ac.in [Centre of Excellence in Nanoelectronics, Department of Electrical Engineering, Indian Institute of Technology Bombay, Powai, Mumbai-400076 (India)

    2014-07-07

    Low-dimensional systems with sharp features in the density of states have been proposed as a means for improving the efficiency of thermoelectric devices. Quantum dot systems, which offer the sharpest density of states achievable, however, suffer from low power outputs while bulk (3-D) thermoelectrics, while displaying high power outputs, offer very low efficiencies. Here, we analyze the use of a resonant tunneling diode structure that combines the best of both aspects, that is, density of states distortion with a finite bandwidth due to confinement that aids the efficiency and a large number of current carrying transverse modes that enhances the total power output. We show that this device can achieve a high power output (?0.3?MW?m{sup 2}) at efficiencies of ?40% of the Carnot efficiency due to the contribution from these transverse momentum states at a finite bandwidth of kT?2. We then provide a detailed analysis of the physics of charge and heat transport with insights on parasitic currents that reduce the efficiency. Finally, a comparison between the resonant tunneling diode and a quantum dot device with comparable bandwidth reveals that a similar performance requires ultra-dense areal quantum dot densities of ?10{sup 12}/cm{sup 2}.

  10. Selecting the suitable dopants: electronic structures of transition metal and rare earth doped thermoelectric sodium cobaltate

    E-Print Network [OSTI]

    Assadi, M H N; Yu, A B

    2012-01-01

    Engineered Na0.75CoO2 is considered a prime candidate to achieve high efficiency thermoelectric systems to regenerate electricity from waste heat. In this work, three elements with outmost electronic configurations, (1) an open d shell (Ni), (2) a closed d shell (Zn), and (3) an half fill f shell (Eu) with a maximum unpaired electrons, were selected to outline the dopants' effects on electronic and crystallographic structures of Na0.75CoO2. Systematic ab initio density functional calculations showed that the formation energy of these dopants was found to be lowest when residing on sodium layer and ranked as -1.1 eV, 0.44 eV and 3.44 eV for Eu, Ni and Zn respectively. Furthermore Ni was also found to be stable when substituting Co ion. As these results show great harmony with existing experimental data, they provide new insights into the fundamental principle of dopant selection for manipulating the physical properties in the development of high performance sodium cobaltate based thermoelectric materials.

  11. Finding the quantum thermoelectric with maximal efficiency and minimal entropy production at given power output

    E-Print Network [OSTI]

    Robert S. Whitney

    2015-03-16

    We investigate the nonlinear scattering theory for quantum systems with strong Seebeck and Peltier effects, and consider their use as heat-engines and refrigerators with finite power outputs. This article gives detailed derivations of the results summarized in Phys. Rev. Lett. 112, 130601 (2014). It shows how to use the scattering theory to find (i) the quantum thermoelectric with maximum possible power output, and (ii) the quantum thermoelectric with maximum efficiency at given power output. The latter corresponds to a minimal entropy production at that power output. These quantities are of quantum origin since they depend on system size over electronic wavelength, and so have no analogue in classical thermodynamics. The maximal efficiency coincides with Carnot efficiency at zero power output, but decreases with increasing power output. This gives a fundamental lower bound on entropy production, which means that reversibility (in the thermodynamic sense) is impossible for finite power output. The suppression of efficiency by (nonlinear) phonon and photon effects is addressed in detail; when these effects are strong, maximum efficiency coincides with maximum power. Finally, we show in particular limits (typically without magnetic fields) that relaxation within the quantum system does not allow the system to exceed the bounds derived for relaxation-free systems, however, a general proof of this remains elusive.

  12. High-Temperature Thermoelectric Properties of p-Type Yb-filled...

    Office of Scientific and Technical Information (OSTI)

    Energy Sciences (SC-22) Country of Publication: United States Language: English Subject: solar (thermal), phonons, thermal conductivity, thermoelectric, mechanical behavior,...

  13. Coherent Thermoelectric Effects in Mesoscopic Andreev Interferometers

    E-Print Network [OSTI]

    Ph. Jacquod; R. S. Whitney

    2009-10-15

    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 $\\phi$.

  14. The thermoelectric properties of inhomogeneous holographic lattices

    E-Print Network [OSTI]

    Aristomenis Donos; Jerome P. Gauntlett

    2015-01-22

    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.

  15. 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

  16. Two dimensional thermoelectric platforms for thermocapillary droplet Man-Chi Liu,ac

    E-Print Network [OSTI]

    Lin, Pei-Chun

    Two dimensional thermoelectric platforms for thermocapillary droplet actuation Man-Chi Liu,ac Jin the cooling function relies on the natural conduction and/or convection. A thermoelectric (TE) chip a novel approach utilizing a 5 6 5 array of thermoelectric (TE) chips. The advantage of using TE chips

  17. Chin. Phys. B Vol. 20, No. 10 (2011) 107301 Measuring thermoelectric property

    E-Print Network [OSTI]

    Gao, Hongjun

    2011-01-01

    Chin. Phys. B Vol. 20, No. 10 (2011) 107301 Measuring thermoelectric property of nano May 2011) A method of measuring the thermoelectric power of nano-heterostructures based on four of a tungsten­indium tip, the precise control of the tip-sample contact and the identification of thermoelectric

  18. Enhanced Thermoelectric Properties of Solution Grown Bi2Te3-xSex Nanoplatelet Composites

    E-Print Network [OSTI]

    Xiong, Qihua

    Enhanced Thermoelectric Properties of Solution Grown Bi2Te3-xSex Nanoplatelet Composites Ajay Soni on the enhanced thermoelectric properties of selenium (Se) doped bismuth telluride (Bi2Te3-xSex) nanoplatelet (NP transport measure- ments, we show that both the thermoelectric power S (-259 V/K) and the figure of merit ZT

  19. 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

  20. 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

  1. 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

  2. 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

  3. 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

  4. 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

  5. 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

  6. Power-Aware Deployment and Control of Forced-Convection and Thermoelectric Coolers

    E-Print Network [OSTI]

    Pedram, Massoud

    Power-Aware Deployment and Control of Forced-Convection and Thermoelectric Coolers Mohammad Javad Angeles, CA, USA {dousti, pedram}@usc.edu ABSTRACT Advances in the thermoelectric cooling technology have made it one of the promising solutions for spot cooling in VLSI circuits. Thermoelectric coolers (TECs

  7. Hierarchically structured TiO2 for Ba-filled skutterudite with enhanced thermoelectric

    E-Print Network [OSTI]

    Cao, Guozhong

    Hierarchically structured TiO2 for Ba-filled skutterudite with enhanced thermoelectric performance be considered. Thermoelectric (TE) materials are a very good candidate to achieve a more efficient usage performance of a thermoelectric material is governed by its power factor P ¼ S2 s. The challenge to develop

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

    E-Print Network [OSTI]

    Cafarella, Michael J.

    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

  9. Trend for Thermoelectric Materials and Their Earth Abundance R. AMATYA1,2

    E-Print Network [OSTI]

    Ram, Rajeev J.

    Trend for Thermoelectric Materials and Their Earth Abundance R. AMATYA1,2 and R.J. RAM1 1 to their price volatility as applications (competing with thermoelectrics) con- tinue to grow, for example with crustal abundance of 30 ppm ($4 9 1018 metric tons) has ZT greater than 0.8. Key words: Thermoelectric

  10. 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

  11. 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

  12. 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

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

    Broader source: Energy.gov [DOE]

    Poster presented at the 16th Directions in Engine-Efficiency and Emissions Research (DEER) Conference in Detroit, MI, September 27-30, 2010.

  14. Interpretation of Self-Potential Anomalies Using Constitutive Relationships for Electrochemical and Thermoelectric Coupling Coefficients

    SciTech Connect (OSTI)

    Knapp, R. B.; Kasameyer, P. W.

    1988-01-01

    Constitutive relationships for electrochemical and thermoelectric cross-coupling coefficients are derived using ionic mobilities, applying a general derivative of chemical potential and employing the zero net current condition. The general derivative of chemical potential permits thermal variations which give rise to the thermoelectric effect. It also accounts for nonideal solution behavior. An equation describing electric field strength is similarly derived with the additional assumption of electrical neutrality in the fluid Planck approximation. The Planck approximation implies that self-potential (SP) is caused only by local sources and also that the electric field strength has only first order spatial variations. The derived relationships are applied to the NaCl-KCl concentration cell with predicted and measured voltages agreeing within 0.4 mV. The relationships are also applied to the Long Valley and Yellowstone geothermal systems. There is a high degree of correlation between predicted and measured SP response for both systems, giving supporting evidence for the validity of the approach. Predicted SP amplitude exceeds measured in both cases; this is a possible consequence of the Planck approximation. Electrochemical sources account for more than 90% of the predicted response in both cases while thermoelectric mechanisms account for the remaining 10%; electrokinetic effects are not considered. Predicted electrochemical and thermoelectric voltage coupling coefficients are comparable to values measured in the laboratory. The derived relationships are also applied to arbitrary distributions of temperature and fluid composition to investigate the geometric diversity of observed SP anomalies. Amplitudes predicted for hypothetical saline spring and hot spring environments are less than 40 mV. In contrast, hypothetical near surface steam zones generate very large amplitudes, over 2 V in one case. These results should be viewed with some caution due to the uncertain validity of the Planck approximation for these conditions. All amplitudes are controlled by electrochemical mechanisms. Polarities are controlled by the curvature of the concentration or thermal profile. Concave upward thermal profiles produce positive anomalies, for constant fluid concentrations, whereas concave upward concentration profiles produce negative anomalies. Concave downward concentration profiles are characterized by small negative closures bounding a larger, positive SP anomaly.

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

    SciTech Connect (OSTI)

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

    2014-06-07

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

  16. Collaborative National Program for the Development and Performance Testing of Distributed Power Technologies with Emphasis on Combined Heat and Power Applications

    SciTech Connect (OSTI)

    Soinski, Arthur; Hanson, Mark

    2006-06-28

    A current barrier to public acceptance of distributed generation (DG) and combined heat and power (CHP) technologies is the lack of credible and uniform information regarding system performance. Under a cooperative agreement, the Association of State Energy Research and Technology Transfer Institutions (ASERTTI) and the U.S. Department of Energy have developed four performance testing protocols to provide a uniform basis for comparison of systems. The protocols are for laboratory testing, field testing, long-term monitoring and case studies. They have been reviewed by a Stakeholder Advisory Committee made up of industry, public interest, end-user, and research community representatives. The types of systems covered include small turbines, reciprocating engines (including Stirling Cycle), and microturbines. The protocols are available for public use and the resulting data is publicly available in an online national database and two linked databases with further data from New York State. The protocols are interim pending comments and other feedback from users. Final protocols will be available in 2007. The interim protocols and the national database of operating systems can be accessed at www.dgdata.org. The project has entered Phase 2 in which protocols for fuel cell applications will be developed and the national and New York databases will continue to be maintained and populated.

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

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

    achievement of 10% improvement in engine thermal efficiency by harvesting exhaust waste heat. * Interpret stress development in TE devices. * Generate needed thermomechanical...

  18. Heat distribution by natural convection

    SciTech Connect (OSTI)

    Balcomb, J.D.; Yamaguchi, K.

    1983-01-01

    Natural convection between spaces in a building can play a major role in energy transfer. Two situations are investigated: convection through a single doorway into a remote room, and a convective loop in a two-story house with a south sunspace where a north stairway serves as the return path. A doorway-sizing equation is given for the single-door case. Detailed data are given from the monitoring of airflow in one two-story house and summary data are given for five others. Observations on the nature of the airflow and design guidelines are presented.

  19. Status of not-in-kind refrigeration technologies for household space conditioning, water heating and food refrigeration

    SciTech Connect (OSTI)

    Bansal, Pradeep; Vineyard, Edward Allan; Abdelaziz, Omar

    2012-01-01

    This paper presents a review of the next generation not-in-kind technologies to replace conventional vapor compression refrigeration technology for household applications. Such technologies are sought to provide energy savings or other environmental benefits for space conditioning, water heating and refrigeration for domestic use. These alternative technologies include: thermoacoustic refrigeration, thermoelectric refrigeration, thermotunneling, magnetic refrigeration, Stirling cycle refrigeration, pulse tube refrigeration, Malone cycle refrigeration, absorption refrigeration, adsorption refrigeration, and compressor driven metal hydride heat pumps. Furthermore, heat pump water heating and integrated heat pump systems are also discussed due to their significant energy saving potential for water heating and space conditioning in households. The paper provides a snapshot of the future R&D needs for each of the technologies along with the associated barriers. Both thermoelectric and magnetic technologies look relatively attractive due to recent developments in the materials and prototypes being manufactured.

  20. Thermoelectric transport through strongly correlated quantum dots

    E-Print Network [OSTI]

    T. A. Costi; V. Zlatic

    2010-07-08

    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.