The theoretical calculation and experimental analysis of R22
R417 and R134a were carried out in air source heat pump water heaters.The results show that the heating capacity and COP of R417A are close to R22 compared to R134a and the discharge temperature is 25 degrees lower than R22
the discharge pressure is also 0.17MPa lower than R22 on average.Although R134a possesses lower discharge temperature and pressure
its heating capacity is much less than R22.The suction pressure of R134a is very low under low t...