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以PR方程结合vdW混合法则,利用修正的二元交互作用系数k_(ij)差值模型,对HFC/HC三元混合工质进行了推算,并与文献给出的5种三元混合工质(HFC32/HFC125/HFC134a、HFC290/HC600a/HFC32、HFC125/HFC143a/HFC134a、HFC32/HC290/HFC227ea、HFC32/HFC125/HC290)的实验值和REFPROP 8.0数据库中的12种三元混合工质(R404A、R407A、R407B、R407C、R407D、R407E、R417A、R422A、R422B、R422C、R422D、R425A)的计算值进行了对比验证,结果表明该模型具有较高的预测能力和计算精度,其中压力计算平均偏差为1.29%,组分计算平均偏差为0.0053。
Based on PR equation combined with vdW mixing rule, the modified binary interaction coefficient k ij difference model was used to calculate the HFC / HC ternary mixed working fluid. The results were compared with the five ternary mixed working fluids (R404A, R404A, R404A, R404A, R404A, R404A, R404A, R404A, R404A, R404A, R407A, R407B, R407C, R407D, R407E, R417A, R422A, R422B, R422C, R422D, R425A). The results show that the model has high predictive ability and calculation precision. The average deviation of pressure calculation is 1.29%, and the average deviation of components was 0.0053.