小型滚动转子压缩机使用R502和R22的性能对比

The Performance of the Rolling Piston Type Refrigerating Rotary Compressor with R502 and R22

对同一台小型滚动转子压缩机,分别使用R502和R22进行变工况下的整体热力性能试验,通过对比二者的性能参数,表明使用R502可使制冷量和容积效率有所提高,排温有所下降,提高了压缩机的可靠性,延长了制冷机的寿命,并且在蒸发温度较低、冷凝温度较高的场合,采用R502具有较明显的节能效果。此外,实验还表明,制冷系数与压力比有一对应关系,并拟合出了该关系式。

In this paper, the experiment of thermal performance of the rolling piston type refrigerating rotary compressor with R502 and R22 has been carried out at various evaporating and condensing temperatures. By comparision with the performance parameters of the compressor with R502 and R22, it is indicated that the refrigeration capacity and the volumetric efficiency increase and the discharge temperature decreases to some extent for the compressor with R502. Furthermore, the compressor with R502 has an obvious improvement on energy saving at lower evaporating temperatures and higher condensing temperatures. The experiment shows there are a particular corresponding relationship between the EER and the pressure ratio. The relationship for the compressor tested has been gained.