直膨式太阳能热泵运行特性的实验研究

Experimental research on the performance characteristic of direct expansion solar energy heat pump

对直接膨胀式太阳能热泵热水系统进行了实验研究,实验期间,太阳能辐照度变化范围为143.12 ～664.6W/m^2,分别采用三种不同结构的集热器和蒸发器,得出系统COP为2.49 ～ 3.47,表明该系统在各种天气情况下均能够可靠地生产45℃的生活热水,热性能稳定,可以全天候地提供生活热水且具有节能效果;同时选取双集热器的两组数据,分析了太阳辐照度对热泵系统运行的影响.

The direct expansion solar heat pump hot water system was carried on some experimental researches. During the experiment, the solar irradiance range was 143.12 ～664.6W/m^2. Using three different structure of the collector/ evaporator respectively, the system＇ COP was 2.49 -3.47. Under various weather conditions ,which showed that the system was able to reliably produce 45℃ hot water and its thermal performance was stable, in a word, this system can provide hot water all day and have energy saving effect;At the same time, two groups data of double collector/evaporator were selected to analyse the influence of solar irradiance on the heat pump system.