几种空气源热泵除霜方式的性能比较

摘要

The defrosting time, discharge pressure, indoor temperature fluctuations and other defrosting characteristics of air sourcernheat pump were experimentally investigated at three defrosting modes, i.e., reverse cycle defrosting, hot gas bypass defrosting andrnphase change material defrosting. The results showed that the performance of phase change material defrosting system is better thanrnthe others. The phase change material has increased the discharge temperature and the condensing temperature, which benefits to therndecrease of defrost time and energy consumption, and the indoor temperature is relatively stable.%针对空气源热泵除霜问题,分别对逆循环除霜系统、热气旁通除霜系统和相变蓄能除霜系统进行对比实验,并对三种除霜方式的除霜时间、除霜时压缩机排气压力、室内温度波动等特性进行比较分析.实验结果表明,相变蓄能系统除霜时的压缩机排气温度比另外两种系统高,使得冷凝温度升高,更有利于缩短除霜时间,且室内温度相对稳定,系统能耗也随之减少.