R22和R134a应用于家用热泵热水器实验性能研究

The Research on the Character of R22 and R134a Applied in Household Heat Pump Water Heater

本实验分别用R22和R134a作为家用热泵热水器的制冷工质,对比分析讨论和实验研究了其加热效果和性能系数,结果表明:R134a系统将90L来流水加热到50℃需要多于实验R22热泵热水器系统40min;相同的加热时间,R134a系统水箱内底层温度和表层温度都低于R22系统,两种系统相同位置的温差随着水箱内温度的提升而增大;R22系统COP高于R134a系统23.1%,这为家用热泵热水器系统制冷工质的选择提供参考。

Refrigerating medium R22 and R134a are applied in household heat pump water heater in this experiment. The heating result and COP are researched and discussed by contrast. The experiment results show that it need more 40min in use of the R134a system than R22 system in order to heat the inlet water to 50℃, the water temperatures of R134a system at the bottom and in the surface are lower than that of R22 system in the same heating time, the temperature increases as the water temperature increases between the two system in the same situation and the COP of R22 system is higher than the COP of R134a system. It can provide reference on the choice of refrigerating medium in the household heat pump water heater.