EVAPORATION HEAT TRANSFER AND PRESSURE DROP OF R32 IN A HORIZONTAL MULTIPORT TUBE WITH MICROFINS

被引：0
|
作者：
Jige, Daisuke [1 ]
Inoue, Norihiro [1 ]
Koyama, Shigeru [2 ,3 ]
机构：
[1] Tokyo Univ Marine Sci & Technol, Koto Ku, Tokyo 1358533, Japan
[2] Kyushu Univ, Interdisciplinary Grad Sch Engn Sci, Kasuga, Fukuoka 8168580, Japan
[3] Int Inst Carbon Neutral Energy Res WPI I2CNER, Kasuga, Fukuoka 8168580, Japan
来源：
5TH IIR INTERNATIONAL CONFERENCE ON THERMOPHYSICAL PROPERTIES AND TRANSFER PROCESSES OF REFRIGERANTS (TPTPR) | 2017年
关键词：
Heat Transfer; Pressure Drop; Evaporation; Multiport tube; Microfin; R32; 2-PHASE FLOW; CONDENSATION;
D O I：
暂无
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
This study investigated the evaporation heat transfer and pressure drop characteristics of refrigerant R32 in a horizontal multiport tube consisting of rectangular minichannels with straight microfins. The heat transfer coefficient and pressure drop were measured for a range of mass velocities from 100-400 kgm(-2)s(-1) and range of heat fluxes from 5-20 kWm(-2) at a saturation temperature of 15 degrees C. The frictional pressure drop during adiabatic two-phase flow was also measured for a range of qualities from 0.1-0.9 at the same saturation temperature. The heat transfer coefficient increased with increasing mass velocity in the high quality region. The effects of heat flux on the heat transfer coefficient were small except in the high quality region. The heat transfer coefficient values for the multiport tube with straight microfins were higher than the values for the multiport tube without microfins at lower mass velocity. The effects of mass velocity and microfins on the frictional pressure drop were clarified.
引用
收藏
页码：1068 / 1075
页数：8
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