相变蓄热系统放热过程性能实验研究  

Experimental Study on Performance of Discharging Process of Phase Change Thermal Storage System

作　　者：张志强[1] 陈华[1] 周楚[1] 

机构地区：[1]天津商业大学机械工程学院,天津300134

出　　处：《制冷学报》2015年第3期102-107,共6页Journal of Refrigeration

摘　　要：本文通过对热泵空调系统的相变蓄热冷凝热回收装置进行放热实验,分别测试了不同冷水进水温度和不同水流量下蓄热箱中石蜡及蓄热箱热水出口温度的变化情况。实验结果表明:水流量对石蜡凝固过程的影响较小,提高水流量或者冷水温度可以在一定程度上缩短获取热水时间,但会相应增加能耗;石蜡初始温度提高,石蜡释放显热的速率加快,可以缩短获取热水时间;提高系统的蓄热效率对冷凝热的回收和利用有较大意义。In this paper, the discharging performance of phase change thermal storage system recovering the condensation heat of heat pump air-conditioning system was experimentally investigated. Variation of outlet temperature of the hot water and paraffin in the heat storage tank were respectively tested under different inlet temperature of cold water and different water flowrate. The experiment results show that the so- lidification process of paraffin is less affected by the water flowrate. When the water flowrate or the temperature of cold water is increased, the time of getting hot water will be shortened to some degree, however, the energy consumption will increase. When the initial temperature of paraffin is raised, the rate of releasing sensible heat of paraffin becomes faster and the time of getting hot water will be shortened. The im- provement of efficiency of the thermal storage system is significant for the recycling and utilization of the condensation heat.

关 键 词：放热过程 相变蓄热 相变材料 实验研究 

分 类 号：TU831.3[建筑科学—供热、供燃气、通风及空调工程] TB34[一般工业技术—材料科学与工程]