1996 Fiscal Year Final Research Report Summary
Study on Direct Energy Conversion by thermoelectric effect in a magnetic field
| Project/Area Number |
06558074
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 試験 |
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| Research Field |
Nuclear fusion studies
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| Research Institution | National Institute for Fusion Science |
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Principal Investigator |
YAMAGUCHI Satarou National Institute for Fusion Science, Department of the Large Helical Device Project, Assistant Professor, 大型ヘリカル研究部, 助教授 (10249964)
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| Co-Investigator(Kenkyū-buntansha) |
TAJIMA Teruhiko National Institute for Fusion Science, Data and Planning Center, Assistant Profe, 研究企画情報センター, 助教授 (90135385)
WATANABE Kunihiko National Institute for Fusion Science. Computer Center, Professor, 計算機センター, 教授 (40220876)
KOMORI Akio National Institute for Fusion Science. Department of the Large Helical Device Pr, 大型ヘリカル研究部, 助教授 (50143011)
SAGARA Akio National Institute for Fusion Science, Department of the Large Helical Device Pr, 大型ヘリカル研究部, 助教授 (20187058)
MOTOJIMA Osamu National Institute for Fusion Science, Department of the Large Helical Device Pr, 大型ヘリカル研究部, 主幹教授 (60109056)
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| Project Period (FY) |
1994 – 1996
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| Keywords | thermoelectric effect / Direct enery conversion / Nernst effect / semiconductor / themomagnectic effect / Indium Antiomonide / form effect / temperature gradient |
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| Research Abstract |
Generation of electric power by the Nernst effect is a new application of a semiconductor. A key point of this new proposal is to find materials with a good figure of merit of the Nernst effect, which is called a Nernst element. We propose InSb as a candidate for the Nernst element, because an electron mobility of InSb is very high at room temperature.. It will be used in a strong magnetic field at high temperatures. The efficiency of this energy conversion depends on transport properties of the Nernst element. Unfortunately we have few data of transport coefficients in such conditions. First we developed the diagnostic system in order to measure transport coefficients (Nernst coefficient, thermoelectric coefficient, Hall coefficient and resistivity) of the Nernst element. From these measurement, we suggest that transport coefficients depend on a shape of a sample. (It is known qualitatively that the resistivity depends on the shape.) Data of the measurement include the shape effect. It is necessary to remove the shape effect from data in order to compare them with calculation by the Boltzmann equation. Next step we analyze the shape effect quantitatively by numerical calculations.
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