The Experts below are selected from a list of 7146 Experts worldwide ranked by ideXlab platform
Zhifeng Ren - One of the best experts on this subject based on the ideXlab platform.
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Thermoelectric Cooling materials.
Nature materials, 2020Co-Authors: Jun Mao, Gang Chen, Zhifeng RenAbstract:Solid-state Thermoelectric devices can directly convert electricity into Cooling or enable heat pumping through the Peltier effect. The commercialization of Thermoelectric Cooling technology has been built on the Bi2Te3 alloys, which have had no rival for the past six decades around room temperature. With the discovery and development of more promising materials, it is possible to reshape Thermoelectric Cooling technology. Here we review the current status of, and future outlook for, Thermoelectric Cooling materials.
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Thermoelectric Cooling materials
Nature Materials, 2020Co-Authors: Jun Mao, Gang Chen, Zhifeng RenAbstract:Thermoelectric materials can generate electricity from waste heat but can also use electricity for Cooling. This Perspective discusses coefficients of performance for these systems and the state-of-the-art for materials, and suggests strategies for the discovery of improved Thermoelectric materials. Solid-state Thermoelectric devices can directly convert electricity into Cooling or enable heat pumping through the Peltier effect. The commercialization of Thermoelectric Cooling technology has been built on the Bi_2Te_3 alloys, which have had no rival for the past six decades around room temperature. With the discovery and development of more promising materials, it is possible to reshape Thermoelectric Cooling technology. Here we review the current status of, and future outlook for, Thermoelectric Cooling materials.
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High Thermoelectric Cooling performance of n-type Mg3Bi2-based materials
Science (New York N.Y.), 2019Co-Authors: Jun Mao, Gang Chen, Hangtian Zhu, Zhiwei Ding, Zihang Liu, Geethal Amila Gamage, Zhifeng RenAbstract:Thermoelectric materials have a large Peltier effect, making them attractive for solid-state Cooling applications. Bismuth telluride (Bi2Te3)–based alloys have remained the state-of-the-art room-temperature materials for many decades. However, cost partially limited wider use of Thermoelectric Cooling devices because of the large amounts of expensive tellurium required. We report n-type magnesium bismuthide (Mg3Bi2)–based materials with a peak figure of merit (ZT) of ~0.9 at 350 kelvin, which is comparable to the commercial bismuth telluride selenide (Bi2Te3–xSex) but much cheaper. A Cooling device made of our material and p-type bismuth antimony telluride (Bi0.5Sb1.5Te3) has produced a large temperature difference of ~91 kelvin at the hot-side temperature of 350 kelvin. n-type Mg3Bi2-based materials are promising for Thermoelectric Cooling applications.
Guangfa Tang - One of the best experts on this subject based on the ideXlab platform.
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Review of solar Thermoelectric Cooling technologies for use in zero energy buildings
Energy and Buildings, 2015Co-Authors: Zhongbing Liu, Guangcai Gong, Hangxin Li, Ling Zhang, Guangfa TangAbstract:Energy crisis and global warming have become more and more serious with the social development. Since buildings account for a significant proportion of the total energy consumption and carbon emissions, it is very necessary and urgent to decrease building energy consumption. Minimizing the need for energy use in buildings through energy-efficient measures and adopting renewable energy are the basic strategies. Zero energy buildings, which only consume solar energy and other renewable energies, have been considered as one solution and have drawn more and more attention in recent years. Solar Thermoelectric Cooling technologies can be powered directly by a photovoltaic (PV) and cause no harm to the environment, which fully fulfill the demand of ZEBs. This paper reviews solar Thermoelectric Cooling technologies and proposes a technical route of solar Thermoelectric Cooling technologies for use in zero energy buildings. It can be seen that solar Thermoelectric Cooling systems can minimize the energy demands, increase energy effectiveness and reduce fossil energy consumption in buildings. With the Thermoelectric and PV industry's development along with the advent of new materials, the solar Thermoelectric Cooling technologies for use in zero energy buildings are promising.
Yu. G. Gurevich - One of the best experts on this subject based on the ideXlab platform.
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The role of non-equilibrium charge carriers in Thermoelectric Cooling
Journal of Applied Physics, 2013Co-Authors: Yu. G. Gurevich, J.e. Velazquez-perezAbstract:This paper is devoted to the analysis of Thermoelectric Cooling phenomena in semiconductors containing potential barriers (p-n-junction). The formulation of an adequate self-consistent theoretical model describing the effect is presented. The role of the recombination rate in lineal approximation of the electric current leads to a new formulation of the set of equations describing the Peltier effect that is discussed in detail. The importance of re-distribution of non-equilibrium charge carriers, which has been ignored in most of the publications on this subject, is also shown. Moreover, it is proved that the conventional theory of Thermoelectric Cooling, which does not take into account the influence of non-equilibrium charge carriers, is not correct in general. In the present work, it is demonstrated that the Peltier effect strongly depends on the recombination rate. In particular, it is shown that the sign of the Peltier effect changes with the value of the recombination rate.
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Thin-Film Thermoelectric Cooling
Technical Physics, 2009Co-Authors: I. M. Lashkevich, O A Fragoso, Yu. G. GurevichAbstract:Basic physical features of Thermoelectric Cooling in p-n structures of a submicrometer thickness, which is manifested even in the linear approximation in current, are investigated. It is shown that a multitem-perature model in which each subsystem of quasi-particles is characterized by its own temperature is effective for studying such structures. The criteria for applicability of the one-temperature model are established. The common structure of the boundary conditions for heat fluxes through the surface at which Thermoelectric Cooling or heating takes place is revealed. Physical regularities are studied for the most interesting cases; the criteria for their implementation are also considered.
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Non-typical temperature distribution in p–n structure under Thermoelectric Cooling
International Journal of Thermal Sciences, 2009Co-Authors: Yu. G. Gurevich, I. LashkevychAbstract:The physical peculiarities of the Thermoelectric Cooling phenomenon by an electric current in p–n structures of thermally thick structure in the linear approximation are investigated. It is shown the possibility of the realization of an exotic distribution of the temperatures of electrons, holes, and phonons: the Thermoelectric Cooling takes place near the p–n interface and in the subsystems of charged quasi-particles only. The phonon subsystem stays in the equilibrium state. The prerequisites to such situation are examined.
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Peculiarities of Thermoelectric Cooling in p-n Structures
International Journal of Thermophysics, 2008Co-Authors: I. Lashkevych, O A Fragoso, Yu. G. GurevichAbstract:The basic physical peculiarities of the phenomenon of Thermoelectric Cooling in p–n structures by an electric current are investigated in the linear approach. It is proved that, for an adequate research of such structures in the general case, a multi-temperature approximation is required. The multi-temperature approximation means that each of the quasi-particle subsystems (electrons, holes, phonons) is characterized by its own temperature. Also, a criterion is found for applying the one-temperature approximation. The most interesting particular cases are studied, explaining the conditions for each case.
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Two-temperature approach to the Thermoelectric Cooling problem
Revista Mexicana De Fisica, 2007Co-Authors: F. A. Serrano Orozco, G. N. Logvinov, Yu. G. Gurevich, Igor LashkevychAbstract:The two-temperature model for Thermoelectric Cooling process study is developed. In this model the electron and phonon temperatures are different. This model can be applied to the design of micro-refrigerators used for the Cooling of microelectronic elements. Electron and phonon energy and heat balance equations are obtained as well as their boundary conditions. Electron and phonon temperature distributions are calculated in the linear approximation of the electric current.
Jun Mao - One of the best experts on this subject based on the ideXlab platform.
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Thermoelectric Cooling materials.
Nature materials, 2020Co-Authors: Jun Mao, Gang Chen, Zhifeng RenAbstract:Solid-state Thermoelectric devices can directly convert electricity into Cooling or enable heat pumping through the Peltier effect. The commercialization of Thermoelectric Cooling technology has been built on the Bi2Te3 alloys, which have had no rival for the past six decades around room temperature. With the discovery and development of more promising materials, it is possible to reshape Thermoelectric Cooling technology. Here we review the current status of, and future outlook for, Thermoelectric Cooling materials.
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Thermoelectric Cooling materials
Nature Materials, 2020Co-Authors: Jun Mao, Gang Chen, Zhifeng RenAbstract:Thermoelectric materials can generate electricity from waste heat but can also use electricity for Cooling. This Perspective discusses coefficients of performance for these systems and the state-of-the-art for materials, and suggests strategies for the discovery of improved Thermoelectric materials. Solid-state Thermoelectric devices can directly convert electricity into Cooling or enable heat pumping through the Peltier effect. The commercialization of Thermoelectric Cooling technology has been built on the Bi_2Te_3 alloys, which have had no rival for the past six decades around room temperature. With the discovery and development of more promising materials, it is possible to reshape Thermoelectric Cooling technology. Here we review the current status of, and future outlook for, Thermoelectric Cooling materials.
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High Thermoelectric Cooling performance of n-type Mg3Bi2-based materials
Science (New York N.Y.), 2019Co-Authors: Jun Mao, Gang Chen, Hangtian Zhu, Zhiwei Ding, Zihang Liu, Geethal Amila Gamage, Zhifeng RenAbstract:Thermoelectric materials have a large Peltier effect, making them attractive for solid-state Cooling applications. Bismuth telluride (Bi2Te3)–based alloys have remained the state-of-the-art room-temperature materials for many decades. However, cost partially limited wider use of Thermoelectric Cooling devices because of the large amounts of expensive tellurium required. We report n-type magnesium bismuthide (Mg3Bi2)–based materials with a peak figure of merit (ZT) of ~0.9 at 350 kelvin, which is comparable to the commercial bismuth telluride selenide (Bi2Te3–xSex) but much cheaper. A Cooling device made of our material and p-type bismuth antimony telluride (Bi0.5Sb1.5Te3) has produced a large temperature difference of ~91 kelvin at the hot-side temperature of 350 kelvin. n-type Mg3Bi2-based materials are promising for Thermoelectric Cooling applications.
Zhongbing Liu - One of the best experts on this subject based on the ideXlab platform.
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Review of solar Thermoelectric Cooling technologies for use in zero energy buildings
Energy and Buildings, 2015Co-Authors: Zhongbing Liu, Guangcai Gong, Hangxin Li, Ling Zhang, Guangfa TangAbstract:Energy crisis and global warming have become more and more serious with the social development. Since buildings account for a significant proportion of the total energy consumption and carbon emissions, it is very necessary and urgent to decrease building energy consumption. Minimizing the need for energy use in buildings through energy-efficient measures and adopting renewable energy are the basic strategies. Zero energy buildings, which only consume solar energy and other renewable energies, have been considered as one solution and have drawn more and more attention in recent years. Solar Thermoelectric Cooling technologies can be powered directly by a photovoltaic (PV) and cause no harm to the environment, which fully fulfill the demand of ZEBs. This paper reviews solar Thermoelectric Cooling technologies and proposes a technical route of solar Thermoelectric Cooling technologies for use in zero energy buildings. It can be seen that solar Thermoelectric Cooling systems can minimize the energy demands, increase energy effectiveness and reduce fossil energy consumption in buildings. With the Thermoelectric and PV industry's development along with the advent of new materials, the solar Thermoelectric Cooling technologies for use in zero energy buildings are promising.
