微通道背板热管系统最佳充液率实验研究  

Experimental study on the optimal refrigerant filling ratio of micro-channel rear door type heat pipe system

作　　者：肖湘武 张泉[1] 凌丽[1] 岳畅[1] 娄建民[1] 易军 Xiao Xiangwu;Zhang Quan;Ling Li;Yue Chang;Lou Jianmin;Yi Jun(College of Civil Engineering, Hunan University, Changsha 410082, China)

机构地区：[1]湖南大学土木工程学院,长沙410082

出　　处：《低温与超导》2018年第4期45-50,87,共7页Cryogenics and Superconductivity

基　　金："十三五"国家重点研发项目;政府间国际科技合作创新重点专项(2017YFE0105800)

摘　　要：为研究不同工况和工质对微通道背板热管系统最佳充液率的影响,设计系统充液率实验,通过分析充液率对换热量、背板竖向出风温度分布、蒸发器及冷凝器进出口工质温度及压力的影响,确定不同条件下的系统最佳充液率。结果表明:1)标准工况下,采用R22工质的系统最佳充液率为65%~75%,背板竖向各位置出风温度最低,蒸发器进出口工质温差达到最小;2)系统最佳充液率随着背板进风温度的上升而增大,进风温度超过40℃后,最佳充液率保持不变;3)系统最佳充液率随冷凝器进水温度的降低而增大;4)R134a系统和R22系统最佳充液率基本一致,最大换热量不同。In order to investigate the effect of different operating conditions and working fluid type on the optimal refrigerant filling ratio of micro - channel rear door type heat pipe system, an experiment under different refrigerant filling ratios was conducted. The optimal refrigerant filling ratio was obtained under different conditions by analyzing the effect of the refrigerant filling ratio on the heat transfer capacity, vertical outlet air temperature distribution, temperatures and pressures at refrigerant side. The results show that： 1 ） The optimal refrigerant filling ratio is 65% -75% for R22 under the standard operating conditions, and the minimum outlet air temperature along with vertical height and minimum temperature difference of refrigerant side between the inlet and outlet of evaporator are achieved. 2 ） The optimal refrigerant filling ratio increases with increasing of the inlet air temperature, and then its remains unchanged when the inlet air temperature beyond 40℃. 3 ） The optimal refrigerant filling ratio increases with the increasing of inlet water temperature of the condenser. 4） The optimal refrigerant filling ratio for R134a is basically in accordance with that for R22, while the maximum heat transfer capacity between them is different.

关 键 词：微通道 背板热管 不同工况和工质 最佳充液率 

分 类 号：TK172.4[动力工程及工程热物理—热能工程]