in order to gain the low temperature at -50℃, tow stage compression refrigeration cycle is adopted in the refrigeration cycle of the testing box.
为了获得-50℃的低温,低温试验箱采用了一级节流中间不完全冷却的两级压缩制冷循环系统。
pr equation was adopted to calculate the thermodynamic properties of the refrigerants, and the available energy analysis for the vapor compression refrigeration cycle was programmed to calc…