单机双级滚动活塞压缩机热泵系统的性能特性

将R410A为工质的单机双级滚动活塞压缩机闪发器系统用于房间空调器,能有效地降低排气温度、提升制冷/制热能力,具有显著的节能效果。通过对单机双级滚动活塞压缩机闪发器热泵系统的分析计算,得出压缩机适宜的高低压腔容积比为4/5。对研制出的样机进行了实验研究,结果表明,在蒸发温度为5℃,冷凝温度为35～45℃的工况下,制冷COP_r最高可达3.81,排气温度低于91℃;蒸发温度为-5～-10℃,冷凝温度为40℃时,制热COP_h最高可达3.38,排气温度低于111℃。

Performance characteristics of two-stage compression heat pump system coupled with dual-cylinder rolling piston compressor

When the two-stage compression cycle coupled with dual-cylinder rolling piston compressor is used in the room air conditioner with the refrigerant of R410A,its heating/cooling capacity can be remarkably improved and the discharge temperature can be reduced.By analyzing thermodynamically the two-stage compression heat pump system coupled with dual-cylinder rolling piston compressor,simulated calculation indicated that the favorable volume ratio of higher-pressure chamber to lower pressure one was 4/5.The experiments for the developed prototype were conducted.The experimental results showed that the coefficient of performance(COP)for cooling conditions could go up to 3.81 and discharge temperature was lower than 91℃ when evaporating temperature kept 5℃ and condensing temperature varied from 35℃ to 45℃,and COP for heating conditions could rise up to 3.38 and discharge temperature was lower than 111℃ when condensing temperature was 40℃ and evaporating temperature varied from -5℃ to -10℃.COP could be improved by 6.8%-15.4% when compared with one-stage compression cycle.