Thermal Performance Analysis of Low-GWP Refrigerants in Automotive Air-Conditioning System

Table 3

Results of the investigated refrigerants at different condensing temperatures.

Item	Tc, ^oC	R152a	R1234yf	R1234ze(E)	R134a
Cooling capacity	30	6.60	6.69	5.61	6.90
	35	6.44	6.38	5.38	6.65
	40	6.24	6.06	5.15	6.39
	45	6.04	5.73	4.91	6.12
Compressor power	30	1.58	1.69	1.25	1.71
	35	1.774	1.90	1.43	1.94
	40	1.984	2.11	1.60	2.15
	45	2.191	2.31	1.77	2.37
COP	30	4.18	3.96	4.47	4.03
	35	3.63	3.36	3.77	3.44
	40	3.15	2.88	3.22	2.97
	45	2.76	2.48	2.78	2.58
Total exergy destruction, Etotal	30	0.549	0.851	0.845	0.748
	35	0.530	0.812	0.821	0.730
	40	0.524	0.780	0.801	0.710
	45	0.532	0.770	0.797	0.701
Total exergy efficiency, ηtotal	30	0.322	0.28	0.357	0.34
	35	0.299	0.26	0.336	0.32
	40	0.27	0.25	0.31	0.3
	45	0.255	0.24	0.29	0.28