单机双级滚动活塞压缩机热泵系统的性能特性

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

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COPr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COPh最高可达3.38,排气温度低于111℃。

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.