应用于低温领域的双温复叠式制冷循环

双温复叠式制冷循环可以用于低温领域中需要提供两个不同制冷温度的场合。首先介绍了双温复叠式制冷循环的原理和组成,然后建立了双温复叠式制冷循环的热力学模型,通过热力计算分析了冷凝温度、低温部分蒸发温度、蒸发冷凝器传热温差、流经高低温蒸发器质量流量比、过热度和过冷度对该循环性能的影响。

Double-temperature cascade refrigerating cycle applied to cryogenic conditions

Double-temperature cascade refrigerating cycle can be applied to the cryogenic conditions which need two refrigerating temperatures.The article described the principle and composing of this recycle first,then established the model of double-temperature cascade refrigerating cycle.The effects taken by thermodynamic factors on this refrigerating cycle were analyzed by the results of thermodynamic calculation,such as condensing temperature,evaporating temperature of low-temperature part,difference in temperature of cascade heat exchanger,mass flux ratio of two evaporators,the degree of subcooling or superheat.