Energy, exergy, and environmental (3E) analysis of a compound ejector-heat pump with low GWP refrigerants for simultaneous data center cooling and district heating

This work presents an energy, exergy, and environmental evaluation of a novel compound PV/T (photovoltaic thermal) waste heat driven ejector-heat pump system for simultaneous data center cooling recovery district heating networks. The uses with evaporative-condenser as driving force ejector while exploiting the generated electric power to operate compressor pumps. vapor compression assessed several environmentally friendly strategies. study compares eleven lower global warming potential (GWP) refrigerants from different ASHRAE safety groups (R450A, R513A, R515A, R515B, R516A, R152a, R444A, R1234ze(E), R1234yf, R290, R1243zf) hydrofluorocarbon (HFC) R134a. results prove that remarkable overall performance enhancement all investigated in both modes. Regarding energy analysis, coefficient (COPC) ranges 15% 54% compared traditional R134a pump. most pronounced COPC is caused by R515B (a 49% COP enhancement), followed R515A R1234ze(E). Concerning exergy shows lowest destruction, highest efficiency than refrigerants.