F103 円筒型マイクロ熱交換器における熱交換性能の評価(OS1 マイクロエネルギー変換),動力エネルギーシステム部門20周年,次の20年への新展開)

概要

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We have developed a Joule-Thomson cooler utilizing a flexible concentric counterflow heat exchanger. In this study, we conducted a simulation to evaluate performance of the Joule-Thomson cooler in a comprehensive package which calculates heat transfer within the heat exchanger in addition to the temperature reduction due to the isenthalpic expansion. Two gases, C_2H_4 and CO_2 were compared. A separate simulation of the heat exchanger was constructed to examine heat exchanger performance of both gases in absence of JT expansion. Simulated results have confirmed experimental result revealing better performance of C_2H_4 despite its lower JT coefficient and lower heat exchanger effectiveness.
2010-06-20