Comparative Analysis of Performance of a Combined Power and Cooling System with Vapor Compression and Absorption Refrigeration System as Bottoming Cycle

In this paper, performance of a combined reheat regenerative steam turbine (ST) based power cycle and a vapor compression refrigeration system (VCRS) is presented and compared with the performance of a similar combined system (CS) integrated with a vapor absorption refrigeration system (VARS). R134a is used as refrigerant in theVCRS while water−LiBr is the working fluid pairs in the VARS. Net power and efficiencies (energy and exergy) of the topping power cycle, COP and exergy efficiency of the bottoming refrigeration system (RS), energy utilization factor (EUF), exergy efficiency of the CS and irreversibility of CS components are the various performance parameters that are compared. The comparative analysis indicates that the net power, EUF, efficiencies of the VCRS integrated CS are more than those of the VAR based system for the same operating conditions. Moreover, these are achieved in the VCR based CS with much lower total system irreversibility, higher COP and exergy efficiency of the bottoming RS.