制冷循环中采用R12、R22和R502的性能分析

Performance Analysis of Refrigeration Cycle with) R12、R22 and R502

对R12、R22、R502在变冷凝温度及变蒸发温度条件下的各循环性能进行了详细的计算和对比,并与实验结果进行了比较。结果表明:R22尤其适合高温工况,R502特别适合低温工况;在实际制冷系统中采用R22或R502替代R12,需对系统中各部件进行一些变动。另外,还给出了q_k、q_0及t_d随t_o和t_k的线性变化关系式,可供计算使用。

In this paper, performance analysis of refrigeration cycle with R12、R22 and R502 has been carried out at various evaporating temperatures and condensing temperatures. The culculating data have been analyzed and compared with the experimental data. The results provide the practical basis for using R22 and R502.