论文部分内容阅读
引言本文通过在开启式活塞压缩机上进行试验,及通过理论分析,对制冷剂HFC134a与CFC12的有关性能进行了比较。结果表明:在某些工况下,使用制冷剂HFC134a时的制冷量,大于使用CFC12时的制冷量。但在整个温度变化范围内,前者所需的压缩机功率亦随之增加,因而性能系数下降。另外,使用HFC134a时的压缩机等熵效率与温度变化有关。这一点,或许可以用HFC134a中使用的聚二醇
Introduction This paper compares the performance of refrigerant HFC134a with CFC12 by conducting tests on open-piston compressors and by theoretical analysis. The results show that under certain operating conditions, the refrigerant capacity of HFC134a refrigerant is larger than that of CFC12 refrigerant. However, within the entire temperature range, the compressor power required by the former also increases, and the coefficient of performance declines. In addition, the isentropic efficiency of the compressor when HFC134a is used is related to the temperature change. In this regard, it may be possible to use polyglycols used in HFC134a