摘要
在热泵热水器使用的典型工况下对R22、R427a、R134a的循环特性进行了理论分析,并在某机组上开展R22、R427a、R134a的直接充注对比实验,研究三种制冷剂的吸/排气压力及温度、压缩机功率、制热量、性能系数随环境温度变化的关系,得出了各特性参数的变化规律;实验表明,R427a与R22相比,制热量下降9%~10%,功率下降5%~6%,COP下降3%~4%,吸气和排气压力分别下降15%~20%、3%~5%,吸气温度上升1℃~3℃,排气温度下降5℃~8℃。R134a与R22相比,制热量下降30%,COP持平。
Theoretical analysis and experiments were carried out on the air resource heat pump water heater using R22, R427a and R134a under different operating conditions. The change law of suction and discharge pressure, suction and discharge temperature, compressor power, heat capacity and COP with the environment temperature were obtained. The research results show that, by using R427 to replace R22 in the heat pump, the heat capacity decreases by 9%~10%, COP decreases by 3%~4%, power decreases by 5%~6% ,suction pressure decreases by 15%~20%, discharge pressure decreases 3%~5%, suction temperature rises 1oC^3oC and discharge temperature decreases by 5oC^8oC. By using R134a to replace R22 in the heat pump, the heat capacity decreases 30%, and COP keeps the same.
出处
《制冷技术》
2013年第4期19-23,共5页
Chinese Journal of Refrigeration Technology
