An Experimental Study on The Performance of An Air Conditioning System using CO2 Refrigerant with The Actual Power Input of 440W

This study presented an experiment on a transcritical CO
₂
air conditioning system using a CO
₂
compressor with the actual power input of 440 W. Relationships such as evaporation pressure, actual power input, air temperature difference, inlet temperature of expansion, cold room temperature, heat transfer rate, COP were mentioned. At the gas cooler pressure of 78 bar and the evaporation pressure of 50 bar, the COP is 7.9 (with the isentropic compression) for the CO
₂
side. For the airside, the COP increases from 2.75 to 4.07 when the evaporator pressure increases from 46 to 50 bar. So, at the evaporation pressure of 50 bar and the cooler pressure of 78 bar, the system should be operated. The COP for the airside is lower than that obtained from the COP for the refrigerant side. In addition, the subcooling method in this study will make the air conditioning system to operate at a lower gas cooler pressure, which led to a more secure and durable system as well as reducing the compression energy.