THE CFD SIMULATION AND EXPERIMENTAL INVESTIGATION OF HEAT PUMP SYSTEM USING THERMOBANK AND COS EJECTOR CYCLE

摘要

This paper shows the results of CFD simulation and experimental investigation in which the heat pump system performance of the low pressure refrigerants R404A was compared between a standard cycle and condenser outlet split ejector cycle (COS). The special features of this study are to use the thermobank and an ejector in heat pump system. The thermobank stored heat from superheat vapor of refrigeration cycle and its energy is used for heating room and defrosting process. The ejector is an expansion device capable of work recovery. Therefore, the thermobank and ejector can help improving coefficient of performance (COP). When compared to standard cycle, the heat pump system using thermobank and COS ejector cycle got maximum COP improvements of 24.5%. This heat pump system can be used to keep preservation of agricultural products in cold storage warehouse together with floor panel heating for room in winter.