Subcooling effect on air-conditioning system by simulation analysis

Abstract

Air-conditioning systems are mainly used in industries and residences to maintain the low temperature and required humidity level. More energy is consumed in air-conditioning systems. Coefficient of Performance (COP) is an important factor for the measure of air-conditioning system performance. Sub cooling is the concept used to reduce the condenser temperature. Sub cooling concept can be obtained by many methods like Humidification, Evaporative cooling etc. In order to optimize the performance of air conditioning systems, the condenser temperature is decreased by evaporative cooling. This approach can be applied to existing air-conditioning system to increase its performance and reduce the energy consumption. Simulation work has been carried out to study the performance of air-conditioning system with sub cooling concept. The condenser heat rejection rate is increased about 5.37%. By reducing condenser temperature about 2 °C, COP is increased about 1.86%. When the condenser temperature is reduced by 4 °C, COP is increased about 2.65%. Similarly same process is carried out for 6 °C, 8 °C and 10 °C; the COP improved about 3.98%, 5.5%, and 6.86% respectively. This simulation work provides an improvement in COP value and the results are compared with and without subcooling concept.