Experimental Study on Running Performance of Heat Pump Air Conditioner Condenser Using R417A Under Variable Working Conditions

In this paper, the running performance of a heat pump air conditioner with refrigerant R417A under variable working conditions have been conducted. The performance experiments of various operating conditions have been conducted in the air-enthalpy test device and the heat pump running performance test system, with the wet and dry bulb temperature outside the room changed from 21to40℃. The performance parameters of refrigerating capacity, COP, suction pressure, discharge pressure were tested while the working conditions were changing. The results of the experiments reflect the running performance of the heat pump air conditioner with refrigerant R417A changing with the variable working conditions quantitatively, such as COP, refrigerating capacity, and so on, while the changes of the pressure in the compressor were also reflected. Changed the refrigerant volume of the system were conducted to observe the change of performance of the heat pump air conditioner, to find the best refrigerant volume for the system. It is shown that the heat pump air conditioner with refrigerant R417A may have an advantage in energy saving and may improve the operating conditions of compressor.