基于工质性质的理想制冷循环及其性能极值的探讨

基金项目:

北京市自然科学基金资助项目(3154032)

详细信息

Ideal Refrigeration Cycle Based on Refrigerant and Its Performance Limitation

College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China

摘要: 建立了基于工质的理想制冷循环概念,提出了性能系数的计算方法,其特征是:换热过程等温,节流过程等熵,压缩过程由无穷多个等熵压缩过程组成,无限接近饱和压缩,并回收节流过程功和压缩过程工质过热产生的有用功.基于几种常用的氟利昂工质和自然工质,分析循环过程功的比例分配及冷量损失状况,对性能系数进行比较研究.
- 工质 /
- 理想循环 /
- 制冷COP /
- 极限
Abstract: The notion of an ideal refrigeration cycle based on refrigerant was established and its calculation method was developed in this paper. The ideal refrigeration cycle based on refrigerant was characterized as follows:the heat exchange process is isothermal, and the throttling process is isentropic, so the vapor compression process is composed of many isentropic processes and it is much closer to saturated process. The useful work of liquid throttling process and vapor compression process were also recovered. Based on some kinds of freon and nature working fluids, the power distribution condition, the loss of cooling capacity and cooling COP were researched in detail.
- working fluid /
- ideal cycle /
- cooling COP /
- limitation performance