TED-AJ03-220 HEAT TRANSFER PERFORMANCE OF MULTI-LAYERED GAS-TO-GAS HEAT EXCHANGER EQUIPPED WITH POROUS METAL PLATES
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概要
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For the purpose of developing a compact gas-to-gas heat exchanger, a multi-layered type of heat exchanger equipped with porous metal plates has been proposed. The present heat exchanger consists of five porous plates separated by four opaque solid walls (a five-layered system), that is, a low temperature section (LTS), a first high temperature section (FHTS), a first heat recovery section (FHRS), a second high temperature section (SHTS), and a second heat recovery section (SHRS). The high temperature gas flows into and out of the FHTS, and then flows into and out of the SHTS. On the other hand, the low temperature gas flows into the SHRS first and then the FHRS, and finally flows out of the LTS. At the FHTS and SHTS, the enthalpy of high temperature gas is effectively converted into thermal radiation emitted from the porous plate. Part of this radiation is absorbed by the separating walls, and then reemitted toward the FHRS, [figure] SHRS and LTS. The porous plates in these FHRS, SHRS and LTS are heated by absorbing the reemitted radiation, and the low temperature gas flowing through the porous plates there is effectively heated by the reverse conversion from thermal radiation into gas enthalpy. A series of experiments have been conducted for two, three, four and five-layered heat exchanger structures. The porous metal plate used here is an alloy of nickel and chromium, and its porosity and absorption coefficient are 93% and 258m^<-1>. The effects of the inlet temperature of high temperature gas (573-973K), the optical thickness of porous metal plate (0 and 7.7), and the heat exchanger structure (i. e. the number of layers) on the temperature distributions in the heat exchanger system, the thermal insulation performance of the system and the heat recovery rate are clarified experimentally.[figure]
- 一般社団法人日本機械学会の論文
著者
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TOMIMURA Toshio
Institute for Materials Chemistry and Engineering, Kyushu University
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Hamano Kouji
Institute Of Advanced Material Study Kyushu University
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Echigo Ryozo
Department Of Mechanical Engineering Shibaura Institute Of Technology
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Tomimura Toshio
Institute For Materials Chemistry And Engineering Kyushu University
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ONIZUKA Asako
Interdisciplinary Graduate School of Engineering Sciences, Kyushu Univ.
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Onizuka Asako
Interdisciplinary Graduate School Of Engineering Sciences Kyushu Univ.
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ECHIGO Ryozo
Department of Mechanical Engineering and Science, Tokyo Institute of Technology
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