制冷剂饱和热力性质的通用简化计算模型

A Generalized Simple Model for Saturated Thermodynamic Properties of Refrigerants

制冷剂热力性质的简化计算是保证制冷空调系统仿真与优化计算的稳健性与快速性的关键之一.制冷剂热力性质简化计算模型的研究目标是函数形式上的通用性和较大参数范围内的准确性.提出了一种适用于制冷剂饱和热力性质的六系数通用简化计算模型,对多种常见制冷剂进行了数据拟合.在制冷空调工况范围内,与国际标准制冷剂物性计算软件REFPROP 9.0相比,该简化计算模型对各种饱和热力性质的最大计算误差均小于±0.6%,计算速度可以提高两个数量级以上.

Simple and fast evaluation of refrigerant thermodynamic properties is one of the key factors to the robustness and speed of refrigeration system simulation and optimization.The investigation aimed to find a generalized simple model to be accurate enough in a wider range of parameters.A new six-coefficient simple model was proposed for refrigerant saturated thermodynamic properties.The data of some typical refrigerants were used for data regression.In the common refrigerating and air-conditioning operating conditions,the comparison between the present model and the international standard refrigerant database REFPROP 9.0 shows that the maximum deviations of refrigerant saturated thermodynamic properties fall into ±0.6%.The calculation speed can be therefore improved two orders of magnitude or more.