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~~~ -~ E E~~~ .,'. Abstract Thermoelectric system has various merits for use in energy conversion because the temperature difference is only required to generate electric power and there are not movable parts in the system. However, ther- moelectric system is not so popular in civil use because its energy conversion efficiency Is not high in the pre- sent tlme. But if we consider the exergy flow even in a conventional turbine generator, the turbine generator system can not use energy completely, and a symbiotic and/or hybrid system can be applied, which is intro- duced in the present study. On the other hand, in fusion reactor there are many parts having large tempera- ture difference because plasma temperature is high and superconducting magnets are used. One of the ap- plications for superconducting system is mentioned and is called Peltler current lead. This can reduce heat leak to low-temperature system, and improve the efficiency of the whole system. Recently, material study has progressed, and various kinds of materials are proposed and studied. The magnetic field effect is introduced as investigated by the author's research group. Magnetic field effect was divided into three levels of the cate- gories. One is in the macroscopic level, and this is characterized by the generalized Ohm's equation. The sec- ond level is characterized by Boltzmann equation, and in this level we can discuss the macroscopic transport parameters. The third level is the mlcroscopic level and we discuss the band structure to solve the carriers themselves, for exam ple Schrddinger equation. In this paper, our recent activities are mentioned in these fields. Ke ywords: thermoelectric converslon, nuclear fusion, magnetic field effect, current lead, Superconducting magnet, energy conversion 1 . C~V~5f- ~ =~~ ~~- i~l996/*f' 12)'J -*.J'- ~) f ~ ;~ 7 4=~<;~!. I~il! l/1+ !'~i /~ ~=i" - '**'=. J.~ - -+ -- + . -.- - :~'* l*+~ Y~ ' rffj'"=t=~i'iu ' ~~<;;~~..(~u(/(~ iC ~~ I~ ~) ~l~ ~· )~ ~~- "~~;~~'J~tf)H~: - ';';;=~~'~TfJLf ~:,~;~~J~~)fq~~ 7~~~ I I-t 'L~e LCJ Ll) ~f/~tLCV~~ ~~ ~~;j~4~~~';~l '~ljlll~j~ 7~~ liJf ~"~O)~~,1~';- eC ~ ~ Ci',,'J7)nLl"'rJ'~:~i~:7' ~ 7~7~~1*A~J t)~~~) ~ ~~ ~) ~; ~ i~fd~' ~ , -.i'i._44~l~!~J}~~<~;'~~';)(~~~),~-~~l~· )~~~- ;~~lt~L)(~~~JcL~. )~ ~~- ~ L C J)~ ~ !:1'*~)J-·-·A^·-·i~ ~f ~',J.,~~~1't ~) ll~f'~L)J jc fd~~ C v+ 7~) ~ ~)~liJI*.~'J:~>~, ~~r~~~(7) ~/ ;~fAl'/.=1~j~i(7)T(_~l:i 7~~:~~~t~_··. l) )~;/~-~ 2 ) i~if'~~..,=,~*~~i: ~ )~ · ~L~_·~i,*,L)Ti ~/;~ f~,~)t,_··~o)~)~~ J~tL ~!1*L 1; ~ 1~ 3 ) ~· )~ ~/;~. J. '~<)J;~.-~~2c~UfrJ Lt*.-JL~· )~~~-·)~~<t+~f)~*

Thermoelectric Conversion and Its Application for Nuclear Fusion