| Project/Area Number |
06402035
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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 | 一般 |
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| Research Field |
Thermal engineering
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
ECHIGO Ryozo Tokyo Institute of Technology, Faculty of Engineering, Prof., 工学部, 教授 (70037737)
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| Co-Investigator(Kenkyū-buntansha) |
TADA Shigeru Tokyo Institute of Technology, Faculty of Engineering, Res.Assoc., 工学部, 助手 (70251650)
KOBAYASHI Kenichi Tokyo Institute of Technology, Faculty of Engineering, Res.Assoc., 工学部, 助手 (10242273)
YOSHIDA Hideo Tokyo Institute of Technology, Faculty of Engineering, Assoc.Prof., 工学部, 助教授 (50166964)
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| Project Period (FY) |
1994 – 1996
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| Project Status |
Completed (Fiscal Year 1996)
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| Budget Amount *help |
¥40,600,000 (Direct Cost: ¥40,600,000)
Fiscal Year 1996: ¥5,700,000 (Direct Cost: ¥5,700,000)
Fiscal Year 1995: ¥18,400,000 (Direct Cost: ¥18,400,000)
Fiscal Year 1994: ¥16,500,000 (Direct Cost: ¥16,500,000)
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| Keywords | porous element / alumel-chromel / Fe-Si / thermoelectric effects / Peltier heat |
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| Research Abstract |
A cumulative thermoelectric conversion phenomenon has been discussed in the permeable porous body consisted of thermoelectric materials and a theoretical study is also developed based on analytical model pertinent to the preceding system. Four kinds of different configuration modules have been fabricated and tested to cool the upstream side cold junctions by combustible premixture and, thereafter, to heat around the downstream side hot junctions of modules by mean of combustion.
(1) Alumel-Chromel thermocouples embedded in matrix shape ceramics. (1mm-dia*1600 pairs in 100*100 mm^2matrix, 1.25mm pitch, 13,25mm thickness).
(2) Alumel-Chromel foiled shape thermocouples combined with electric insulator sheets (50*50mm^2,200pairs).
(3) A genuine thermoelectric module of porous structure fabricated by sintering of Alumel-Chromel particles (10*10mm^2element*64pairs, 16mm thickness).
(4) A thermoelectric element of porous structure fabricated by sintering of Fe-Si particles (not successful for modulization).
The expected results have been obtained regarding the modules of (1) and (2), though the configuration of porous structure is not ideal. The connecting modulization technology has not been basically overcome for the genuine porous module consisting of particle-sintered elements. However, some important data have been exploited such as effective thermal conductivity, permeability of porous element which enable us to evaluate the thermoelectric module optimum design by theoretical procedures. The theoretical model is extended to calculate the COP of porous module for heating/cooling system, the results of which showed some excellent characteristics in the reversed conversion from electric energy to heat.
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