Effect of variation in condenser inlet air temperature on actual COP in automobile air conditioning system

In this paper effect of condenser inlet air temperature on actual cop is evaluated. Pure R134a is used initially, its performance is compared with mixing of nano particles. The temperature differential between the condensing refrigerant and the ambient air diminishes as the CIAT increases. This lowers the condenser’s heat rejection rate, which increases liquid refrigerant buildup in the condenser and, as a result, rises the condenser pressure. The discharge temperature for both the refrigerant is slightly different. At 1600 rpm the discharge temperature of R134a at 37.5◦C is 99C which is 12% higher than nano refrigerant. The discharge temperature of nano refrigerant is always less than pure R134a refrigerant. The power consumption of nano refrigerant R134a+0.1nm at 1600 rpms and at 30◦C is 1008.0 watts which is 10% less than pure R134a refrigerant power consumption. The COP of nano refrigerant of R134a+0.1nm at 30◦C is 2.754 which is 12% higher than pure R134a refrigerant.