pr方程 meaning in Chinese

peng-robinson equation

This paper offers some performance data calculate with computer program and figures which variation of performances of refrigeration in different refrigerants and circle with evaporating temperature . it shows that it is feasible to calculate thermodynamic properties of refrigerants with equation of state pr in ideal circle and new refrigerants sfuch as r134a , r152a have not more coefficient of performance ( cop ) than r22 in single - press circle but still have preferable practical value in freezing refrigeration ; the results also demonstrate the importance and need for applying mixed - refrigerant in freezing
本文给出了几种制冷工质在单级和双级压缩制冷循环下的一些性能数据及各性能随蒸发温度变化比较图。结果表明，利用pr方程得出的制冷工质物性，可用于计算制冷循环性能；在单级制冷循环中， r12和r22仍具有较高的制冷系数，但新工质如r134a 、 r152a在较低温度制冷中具有很高的研究价值；计算也表明，在较低温度制冷中，混合工质的研究是极有价值的。