一种高温热泵制冷剂的理论和实验研究
Theoretical and Experimental Study on a High Temperature Heat Pump Refrigerant

提出一种 ODP 为 0 的高温非共沸制冷剂 BY4，通过与其他 4 种纯制冷剂的理论循环计算对比，得出 BY4 在冷凝温度区间(90～110,℃)的 COP、单位容积功、冷凝压力方面性能优越，且热物理性质良好；同时设计了以 BY4 为工质的高温热泵机组，在经过改造的热泵检测系统上进行了蒸发器进水温度在 40～60,℃的实验工况测 试．实验结果表明：冷凝器侧最高出水温度能达到 110,℃，此时排气温度和冷凝压力适中；当冷凝器侧出水温度和 蒸发器侧进水温度差小于 35,℃时，COP 总是大于 3.5．
BY4 was presented as a high temperature non-azeotropic refrigerant，and its ozone depression poten- tial(ODP)was zero. Through theoretical cycle calculation comparison with other four kinds of pure refrigerant，it was concluded that the coefficient of performance(COP)，unit volumetric work and condensing pressure of BY4 in the condensing temperature range(90―110,℃) were more excellent，and its thermal physical properties were also better. At the same time a high temperature heat pump unit based on BY4 refrigerant was designed to carry out a experimen- tal test，which was conducted in a transformed heat pump testing system with the evaporator inlet temperature rang- ing from 40 to 60,℃. According to the experimental results，the condenser outlet water temperature can reach as high as 110,℃，the discharge temperature and condensing pressure are moderate under this condition，when the differ- ence between the condenser outlet water temperature and the evaporator inlet temperature is less than 35,℃，COP is always higher than 3.5