水多级压缩式制冷循环理论研究

Study of water multi-stage compression refrigeration cycle

针对水作为制冷工质的特点 ,提出了以水三级压缩式制冷循环的系统流程 ,对循环性能系数COP、排气温度和输气容积比进行了分析和计算。分析表明 ,以水作为制冷工质 ,其循环的理论COP均高于R2 2、R134a。由于水压缩式制冷循环具有较高的排气温度 ,因而在中高温热泵领域 ,以水为工质是具有竞争力。

A water three-stage compression refrigeration cycle was developed in the light of the characteristics of water as refrigerant.The COP (coefficient of performance),discharge temperature and the suction volume ratio of the cycle was calculated and analyzed.The results shows the COP of the refrigeration cycle of the water is higher than that of the halocarbons refrigerants (for example,R22 and R134a).In the medium and high temperature heat pump area,the water as a working substance is the most competitive due to the higher discharge temperature of the system.