Condensation Behavior in a Microchannel Heat Exchanger
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概要
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A small and high performance heat exchanger for small size energy equipments such as fuel cells and CO<SUB>2</SUB> heat pumps is required in these days. In author's previous studies, the heat exchanger consisted of microchannels stacked in layers has been developed. It has resistance to pressure of larger than 15 MPa since it is manufactured by diffusion bond technique. Thus this device can be applied for high flow rate and pressure fluctuation conditions as boiling and condensation. The objectives of the present study are to clarify the heat transfer performance of the prototype heat exchanger and to investigate the thermal hydraulic behavior in the microchannel for design optimization of the device. As the results, it is clarified that the present device attained high heat transfer as 7 kW at the steam condensation, despite its weight of only 230 g. Furthermore, steam condensation behavior in a glass capillary tube, as a simulated microchannel, in a cooling water pool was observed with various inlet pressure and temperature of surrounding water. Relation between steam-water two-phase flow structure and the overall heat transfer coefficient is discussed.
- 一般社団法人日本機械学会・社団法人日本伝熱学会の論文
著者
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Abe Yutaka
Department Of Biotechnology And Life Science Faculty Of Engineering Tokyo University Of Agriculture
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Suzuki Yutaka
Welcon Co. Ltd.
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KANEKO Akiko
Department of Engineering Mechanics and Energy
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TAKEUCHI Genki
Fuji Heavy Industries Ltd.
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