饱和线上R22热力性质及传输特性的快速计算模型

在马丁侯系列方程的基础上提出R22在饱和线上热物理性质统一的显式计算模型,并且达到已知饱和线上13个热物理参数(温度,压力,比体积,密度,焓,熵,定压比热容,定容比热容,动力粘度,运动粘度,热导,音速,表面张力)的任意一个,即可求得其它所有参数。该模型为显式形式,不存在迭代,既可以保证计算模型的高速性和稳定性,又可以达到较满意的精度;同时所有热物性的计算模型的形式统一性也便于系统编程和仿真调用。以REFPROP7的数据作为数据源,对制冷剂R22的热物性在饱和线上(从三相点到临界点)进行了拟合,并将该快速计算模型与REFPROP7数据源进行对比。对比结果表明,所有快速计算模型的总平均偏差小于0.07%,最大偏差小于18.00%;速度比REF-PROP7的计算速度提高了2~3个数量级。

Fast Calculation Model of Thermodynamic and Transport Properties of R22 on Saturation Curve

A uniform fast calculation model for R22 thermodynamic and transport properties on Saturation curve,covering temperature from the three-phase point(115.8K) to the critical point(369.3K),is rendered.Due to its uniform expression and no need of iteration,this method can guarantee the calculation stability and fast calculation speed of the properties of R22.The model can be used in simulation of refrigeration system.The source data is taken out from REFPROP7.The comparison result shows that the calculation speed of the fast calculation model is two to three orders faster than those of REFPROP7.And the total mean relative deviation and maximum relative deviation for all fast calculation models are less than 0.07 % and 18.00 %,respectively.