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Vapor compression refrigeration cycle generally is used in the Air-Conditioning (AC) system. In order to increase the energy efficiency, the Coefficient of Performance (COP) of the cycle need to be enhanced. Many innovations can be used, one is to utilize internal heat exchanger (IHX). In this work, the effect of IHX in the vapor compression cycle with refrigerant R32 is investigated and compared with refrigerant R22. The analyses are carried out at temperature evaporation of -5°C, 0°C, and 5°C by using software  ASPEN PLUS . The results show that effect of IHX in the cycle with refrigerant R22 increases the COP from 22.78% to 25.61%. On the other hand, in the cycle with refrigerant R32 the COP increases from 33.79% to 36.80%. The average increase for the cycle with refrigerant R22 and refrigerant R32 is 24.14% and 37.04%, respectively. This fact reveals that IHX in the cycle with R32 is more effective that the cycle with refrigerant R22.

Effect of internal heat exchanger to the performance of vapor compression cycle using refrigerant R32