混合工质充注量、混合工质配比以及外界环境温度是自复叠制冷循环工作特性重要影响因素。本文提出新的定密度法研究变工况下自复叠制冷循环的工作特性。建立了组成系统部件热力学数学模型,分析了混合工质充注量、混合工质配比以及外界环境温度等参数对自行复叠制冷循环的工作特性影响,并得出有指导意义结论。
The new method of constant density is developed to evaluate characteristics of the autocascade refrigeration cycle(ARC) at off-design conditions.Thermodynamic models on components making up the ARC are established.The influences of charge and composition ratio of refrigerant mixtures and ambient temperature on cycle performance of the ARC are analysed.Constructive conclusions are drawn.