D210 ジュール・トムソン型マイクロ冷凍機に関する研究(OS-1 マイクロエネルギー変換(2),一般講演,地球温暖化防止と動力エネルギー技術)

概要

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We have made a prototype Joule-Thomson micro-cooler that was fabricated on Si wafer and sensitive glass by photofabrication. The micro-cooler in the present study uses ethylene as a refrigerant. The cooling power of 20mW at evaporator temperature of 272K was attained at the inlet and outlet gas pressures of 2.5MPa and 0.1MPa, respectively. The difference of cooling power between Si wafer type and sensitive glass type was not observed. To understand the low cooling performance, numerical analysis of heat exchanger has been done and the effects of mass flow rate and thermal conductivity of solid on temperature profiles and effectiveness were examined. It was found that the mass flow rate of the present experiment is too large. The temperature effectiveness can be improved by decreasing mass flow rate and also by decreasing thermal conductivity of solid material.
社団法人日本機械学会の論文
2008-06-18