XVI ICT '97. Proceedings ICT'97. 16th International Conference on Thermoelectrics (Cat. No.97TH8291)最新文献_第3页

Low dimensional thermoelectrics 低维热电

XVI ICT '97. Proceedings ICT'97. 16th International Conference on Thermoelectrics (Cat. No.97TH8291) Pub Date : 1997-08-26 DOI: 10.1109/ICT.1997.666969

M. Dresselhaus, T. Koga, X. Sun, S. Cronin, K. Wang, G. Chen

引用次数: 34

The use of thermoelectric converters for the production of electricity from biomass 利用热电转换器从生物质中生产电力

XVI ICT '97. Proceedings ICT'97. 16th International Conference on Thermoelectrics (Cat. No.97TH8291) Pub Date : 1997-08-26 DOI: 10.1109/ICT.1997.667604

Markus Doloszeski, A. Schmidt

{"title":"The use of thermoelectric converters for the production of electricity from biomass","authors":"Markus Doloszeski, A. Schmidt","doi":"10.1109/ICT.1997.667604","DOIUrl":"https://doi.org/10.1109/ICT.1997.667604","url":null,"abstract":"The role of renewable sources of energy to replace fossil fuels and in reducing carbon dioxide emissions and conserving natural resources has been widely realised. Among the renewable sources of energy bioenergy appears to have at the present the greatest potential. The use of biofuels for heating purposes in rural areas has been developed extensively in the past years especially in the Nordic countries and Austria. In these countries the contribution of biofuels to the total energy demand has reached 12 to 15%. Efforts to produce electricity from biomass have been less successful although this would be for great interest for small scale decentralised power production in remote rural areas. Three technologies have been suggested: steam engines, gasification of biomass combined with gas motors and Stirling engines. All the technologies mentioned involve the use of elaborate mechanical equipment and, therefore, need for their operation and for their maintenance highly trained personnel. During the past 25 years thermoelectric converters have been developed mainly for space applications. This technology is now also being applied to supply electricity in remote places such as light houses or on mountains but appear also possible in bioenergy applications. These installations are normally supplying hot water for space heating. Low conversion efficiencies to electricity are no problem as heat can also be utilised. First tests of the technology have been performed in a bench scale unit in the laboratory. It has a capacity of about 0.45 kW electricity and 6.8 kW of heat in form of hot water.","PeriodicalId":174813,"journal":{"name":"XVI ICT '97. Proceedings ICT'97. 16th International Conference on Thermoelectrics (Cat. No.97TH8291)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122102213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

The effectiveness of water vapor sealing agents when used in application with thermoelectric cooling modules 与热电冷却模块一起使用时，水蒸汽密封剂的有效性

XVI ICT '97. Proceedings ICT'97. 16th International Conference on Thermoelectrics (Cat. No.97TH8291) Pub Date : 1997-08-26 DOI: 10.1109/ICT.1997.667623

M.J. Nagy

引用次数: 4

Huge thermoelectromotive force generated by porous ceramics of Y/sub 2/O/sub 3/ Y/sub 2/O/sub 3/多孔陶瓷产生的巨大热电动势

XVI ICT '97. Proceedings ICT'97. 16th International Conference on Thermoelectrics (Cat. No.97TH8291) Pub Date : 1997-08-26 DOI: 10.1109/ICT.1997.667187

K. Koumoto, W. Seo, S. Ozawa

引用次数: 0

Thermoelectric eddy currents. Calculation and control methods 热电涡流。计算及控制方法

XVI ICT '97. Proceedings ICT'97. 16th International Conference on Thermoelectrics (Cat. No.97TH8291) Pub Date : 1997-08-26 DOI: 10.1109/ICT.1997.667601

L. Anatychuk, O. Luste

引用次数: 3

A study of commercial thermoelectric generation in a processing plant of combustible solid waste 可燃固体废物处理厂的商业热电发电研究

XVI ICT '97. Proceedings ICT'97. 16th International Conference on Thermoelectrics (Cat. No.97TH8291) Pub Date : 1997-08-26 DOI: 10.1109/ICT.1997.667590

A. Tsuyoshi, S. Kagawa, M. Sakamoto, K. Matsuura

引用次数: 9

Effect of electrons and phonons temperature mismatch on thermoelectric properties of semiconductors 电子与声子温度失配对半导体热电性能的影响

XVI ICT '97. Proceedings ICT'97. 16th International Conference on Thermoelectrics (Cat. No.97TH8291) Pub Date : 1997-08-26 DOI: 10.1109/ICT.1997.667593

L. Bulat

{"title":"Effect of electrons and phonons temperature mismatch on thermoelectric properties of semiconductors","authors":"L. Bulat","doi":"10.1109/ICT.1997.667593","DOIUrl":"https://doi.org/10.1109/ICT.1997.667593","url":null,"abstract":"A tendency of micro-miniaturisation of thermoelectric generators, coolers and sensors demands an increase of temperature gradients for preserving their power. It is impossible to consider that temperatures of electrons and phonons are equal in these conditions, so an electrons and phonons temperature mismatch begins to realise. A system of nonlinear equations for an energy balance of electrons and phonons and a continuity equation for current density is solved to study this mismatch. It is taken into account an electron-phonon energy interaction and a dependence of all kinetic coefficients on electrons and phonons temperatures. It is shown that the three components of the mismatch are exist under large temperature gradients: the first component is proportional to a temperature gradient squared; the second component is proportional to a product of a temperature gradient and an electric field; and the third to an electric field squared. On the volume of a sample the all components do not depend on coordinates and do not also depend on a type of heat boundary conditions for electrons and phonons. The temperature mismatch is leading to a change of formulae for electric current density and heat flow density, for all kinetic coefficients and for the thermoelectric figure of merit. The figure of merit increase in consequence of the mismatch. This increase is starting to be shown up in thermoelectrics at temperatures gradients /spl sim/10/sup 5/ K/cm.","PeriodicalId":174813,"journal":{"name":"XVI ICT '97. Proceedings ICT'97. 16th International Conference on Thermoelectrics (Cat. No.97TH8291)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130607747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Thermal conductivity of thin films-experimental methods and theoretical interpretation 薄膜热导率的实验方法和理论解释

XVI ICT '97. Proceedings ICT'97. 16th International Conference on Thermoelectrics (Cat. No.97TH8291) Pub Date : 1997-08-26 DOI: 10.1109/ICT.1997.667630

F. Volklein, T. Starz

{"title":"Thermal conductivity of thin films-experimental methods and theoretical interpretation","authors":"F. Volklein, T. Starz","doi":"10.1109/ICT.1997.667630","DOIUrl":"https://doi.org/10.1109/ICT.1997.667630","url":null,"abstract":"The determination of the thermal conductivity of thin films is of great interest both for understanding the structure and conduction mechanism and for numerous technical applications of these films. The thermal conductivity /spl lambda/ is a crucial term of the thermoelectric figure of merit z=/spl alpha//sup 2//spl sigma///spl lambda/ and consequently an important parameter for the design of thermoelectric thin film devices. Usually the film properties differ considerably from the bulk. Recently research activities are focused on thermoelectric thin film materials, since high z values can be expected in low-dimensional structures. Standard methods for the investigation of the Seebeck coefficient /spl alpha/ and the electrical conductivity /spl sigma/ are well established. However, measurements of the thermal conductivity of thin films are sophisticated and associated with various problems. New methods for the measurement of the thermal conductivity of thin films are reviewed. The problems of stationary and transient measuring techniques are discussed. The results are interpreted with models of surface scattering and grain boundary scattering of charge carriers and phonons.","PeriodicalId":174813,"journal":{"name":"XVI ICT '97. Proceedings ICT'97. 16th International Conference on Thermoelectrics (Cat. No.97TH8291)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131006876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 30

Magneto-thermoelectric properties of undoped and doped Bi-Sb single crystals 未掺杂和掺杂Bi-Sb单晶的磁热电性质

XVI ICT '97. Proceedings ICT'97. 16th International Conference on Thermoelectrics (Cat. No.97TH8291) Pub Date : 1997-08-26 DOI: 10.1109/ICT.1997.667063

V. Grabov, O.N. Uryupin

{"title":"Magneto-thermoelectric properties of undoped and doped Bi-Sb single crystals","authors":"V. Grabov, O.N. Uryupin","doi":"10.1109/ICT.1997.667063","DOIUrl":"https://doi.org/10.1109/ICT.1997.667063","url":null,"abstract":"Electrical resistivity /spl rho/, Seebeck coefficient /spl alpha/ and thermal conductivity /spl kappa/ of Bi/sub 1-x/Sb/sub x/ crystals were measured depending on alloy composition, doping, and crystallographic orientation, temperature in an interval 77-300 K, magnetic field up to 2 T. To prepare alloys, Bi and Sb refined up to 99.9999 at.% was used. The single crystals Bi/sub 1-x/Sb/sub x/ (0<x<0.15) were grown by a horizontal zone recrystallization method at a growth rate V=0.05 cm/hours and temperature gradient G=20 K/cm. It is shown, that the n-type (Bi/sub 0.93/Sb/sub 0.07/)<Sn/sub 0.001 at%/> crystals at the temperature of practical interest T=180 K have the following magneto-thermoelectric figure of merit (Z/sub 33/(B/sub 2/)): 2.79/spl middot/10/sup -3/ 1/K at B=0, 4.79/spl middot/10/sup -3/ 1/K at B=0.25 T, and 4.95/spl middot/10/sup -3/ 1/K at B=0.50 T. Caused by a magnetic field the changes of transport coefficients and Z are the result of reduction of the energy dependence of the effective relaxation time, and reduction of the partial mobility and the distinctions for light and heavy charge carriers, electrons and holes in a magnetic field. The initial conditions for obtaining the highest magneto-thermoelectric figure of merit are formed by doping by donor or acceptor impurity.","PeriodicalId":174813,"journal":{"name":"XVI ICT '97. Proceedings ICT'97. 16th International Conference on Thermoelectrics (Cat. No.97TH8291)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125220190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Magneto-thermoelectric studies of high temperature superconductors 高温超导体的磁热电研究

XVI ICT '97. Proceedings ICT'97. 16th International Conference on Thermoelectrics (Cat. No.97TH8291) Pub Date : 1997-08-26 DOI: 10.1109/ICT.1997.667581

M. Pękała, M. Ausloos

引用次数: 0