Performance characteristics of seawater heat pump using R32/R152a mixed refrigerant

Abstract

In this study, a 2RT seawater heat pump was designed and constructed. Then the system performance characteristics according to various variables were experimentally compared and analyzed. To analyze the performance of the 2RT seawater heat pump using the R32/R152a mixture, a performance test of the seawater heat pump according to the composition ratio of the mixed refrigerant and the temperature changes of the evaporation and condensation heat sources was conducted using the experimental conditions. The compressor discharge gas temperature and the compressor power requirement increased as the temperature of the heat source increased and as the composition of R32 increased. The 50% R32 composition showed a higher coefficient of performance of the system than the 35% R32 composition. For the evaporation heat source temperature of 9°C, when the R32 composition was 50%, the coefficient of performance increased by about 5.1% on the average from that when the R32 composition was 35%. Copyright ？ 2014 by the International Society of Offshore and Polar Engineers (ISOPE).