冬季空气源热泵室外机喷淋湖水无霜运行能耗

Spraying Lake Water Frost-free Transformation of Air-source Heat Pump Outdoor Machine in Winter

针对连云港某公共建筑空气源热泵室外机冬季结霜问题,提出采用湖水喷淋方式实现空气源热泵无霜运行。对室外机采取喷淋的判定条件进行分析,采用TRNSYS软件,建立空气源热泵流程,根据建筑全年逐时热负荷,对空气源热泵无霜改造前后的耗电量进行模拟计算。室外机采取湖水喷淋的判定条件:室外空气温度<7℃,且空气相对湿度≥60%。与无霜改造前相比,改造后空气源热泵全年可节电4.2%。

In view of the winter frost of airsource heat pump outdoor machine for a public building in Lianyungang, a method of lake water spray is put forward to realize frost-free operation of air-source heat pump. The judgment conditions for spraying the outdoor machine are analyzed. The process of air-source heat pump is established by TRNSYS software,and the power consumption of air-source heat pump before and after the frost-free transformation is simulated and calculated according to the annual hourly thermal load of the building. The judgment conditions for spraying the outdoor machine are as follows：the outdoor air temperature is less than 7 ℃, and the air relative humidity is more than or equal to 60%. Compared with before frost-free transformation, after the transformation, the air-source heat pump can save electricity by 4. 2% yearly.