太阳能空气源复合多功能热泵系统的试验研究

Experimental Study of Multi-functional Solar-air Source Heat Pump System

构建了一种多功能直膨式太阳能与空气源复合的热泵系统。在常州的冬季及春季分别对试验样机的运行特性进行研究。试验结果表明:系统在冷暖联供的工况下,即同时产生生活热水和冷冻水,整个过程平均COP为6.0;在冬季,太阳辐射强度为354 W/m^2时,系统制生活热水平均COP为4.32;模拟系统供暖,即将循环水从40℃加热至45℃时,测试结果中最低COP为5.07。在春季,太阳辐射强度为856 W/m^2时,系统制生活热水平均COP为5.78。夏季时,系统同时生产冷热水用于生活热水和供冷的需求;冬季时,由于太阳能的辐射,提高了系统的蒸发温度,热泵的性能因此得到提升。

A multi-functional direct-expansion type solar-air source heat pump system was developed. An experimental prototype was investigated in summer and winter in Changzhou. Experimental results showed that when domestic hot-water and chilled water are produced at the same time,the average COP（ coefficient of performance） of the system is 6. 0; in winter,the average COP is4. 32 when the average solar radiation intensity is 354 W / m2; when the circulating water was heated from 40 ℃ to 45 ℃ to simulate the heating condition,the minimum COP in the results is 5. 07. In spring,the average COP is 5. 78 when the solar radiation intensity is 856 W / m2. In summer,the domestic hot- water and chilled water could be produced simultaneously; in winter,the evaporator temperature is raised through solar energy input which,in turn,translates into improvement in the thermal performance of the heat pump.