EFFECT OF PRESSURE DROP OF THE HEAT EXCHANGER ON MINIATURE J-T REFRIGERATOR USING MIXED REFRIGERANT
This paper describes the specific effect of the pressure drop in a recuperative heat exchanger on the performance of miniature J-T (Joule-Thomson) refrigerator. The numerical analysis of the miniature J-T refrigerator is performed to investigate the effect of pressure drop. The result shows that the optimum composition of mixed refrigerant calculated without consideration of the pressure drop in the heat exchanger cannot fulfill the expected refrigeration power. This phenomenon is related to the change of the pinch point location in the recuperative heat exchanger. It is suggested that the optimum composition should be determined with realistic pressure drop situation of the heat exchanger, which may require accurate numerical analysis modeling concerned with hydraulic and thermal characteristics of two-phase flow in micro-channel.
Gyuwan Hwang Sangkwon Jeong Sehwan In
Department of mechanical engineering, Korea Advanced Institute of Science and Technology, Guseong-dong Yuseong-gu, Daejeon, 305-701, Republic of Korea
国际会议
The 22nd International Congress of Refrigeration(第22届国际制冷大会)
北京
英文
2007-08-21（万方平台首次上网日期，不代表论文的发表时间）