his paper analyzed the two - stage compression refrigeration cycle with different intercoolers. The refrigeration coefficients of cycles with shell - and - coil intercooler and flash intercooler were calculated based on a case of cold store. The results show that theoretical refrigeration coefficient.increased by 1.3% and the refrigeration coefficient for the case increased by 0. 7% -0.8% when shell - and - coil intercooler was replaced by Dash intercooler in two - stage compression cycle. The theoretical power consumption of refrigeration cycle with flash intercooler will decrease 5kW than that with shell - and - coil intercooler under full capacity. The initial investment cost will also reduce if flash intercooler is adopted in two - stage compression system.%文中分析不同节流方式下的两级压缩制冷循环.基于冷库实例,计算出了制冷循环在一次节流和二次节流方式下的制冷系数.结果显示,使用两次节流制冷循环,理论制冷系数提高了1.3％,冷库实例制冷系数提高了0.7％-0.8％.两次节流制冷系统在满负荷下运行时,压缩机消耗的理论功率比一次节流下降5kW.使用两次节流方式的制冷系统,在初投资费用上也有所降低.
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