双缸滚动转子式压缩机采暖热泵低温制热性能

Heating performance of space heating heat pump based on dual-cylinder rotary compressor in ultra-low temperature

对双缸滚动转子式压缩机采暖热泵在环境温度(Tod)为-30~0℃,出水温度(Two)为41~50℃范围内的制热进行测试。研究表明:外界环境温度对排气温度、蒸发温度影响很大,对冷凝温度影响很小;热水出水温度对冷凝温度影响很大,对排气温度、蒸发温度影响很小。随着外界环境温度的降低,采暖热泵的制热量急剧下降,当Two=41℃时,Tod从0℃下降到-30℃,制热量的降幅达62.16%;随着出水温度的升高,采暖热泵的制热量下降缓慢,当Tod=0℃时,Two从41℃上升到45℃,制热量降幅仅为5.61%;外界环境温度对COPh值的影响也显著,当Two=41℃时,Tod从0℃下降到-30℃,COPh值从2.94下降到1.38,降幅达53.06%。双缸滚动转子式压缩机采暖热泵应用于-30~0℃的低温工况下,具有良好的实用价值。

The heating performance of space heating heat pump (SHHP) with dual-cylinder rotary compressor was tested at low ambient temperature (Tod) in the range of -30-0℃, and water outlet temperature (Two) in the range of 41-50℃. The results show that ambient temperature has great influence on its discharge temperature and evaporating temperature, but little on condensing temperature;hot water outlet temperature has great influence on its condensing temperature, and little influence on its discharge temperature and evaporating temperature. With the decrease of ambient temperature, the heat capacity of SHHP decreases sharply, when Two = 41℃, Tod decreases from 0℃ to -30℃, and the heat capacity decreases by 62.16%. With the increase of outlet temperature, the heat capacity of SHHP decreases slowly, when Tod = 0℃, Two rises from 41℃ to 45℃, the heat capacity decreases by only 5.61%. The influence of ambient temperature on COPh value is also obvious, when Two = 41℃, Tod decreases from 0℃ to -30℃, COPh decreases from 2.94 to 1.38, a drop of 53.06%. The SHHP with dual-cylinder rotary compressor has good practical value to be applied in low temperature condition of -30-0℃.