HFC/HC三元混合工质气液相平衡推算  

Prediction of Vapor-Liquid Equilibria for Ternary HFC/HC Mixtures

作　　者：胡芃[1] 陈龙祥[1] 陈则韶[1] 

机构地区：[1]中国科学技术大学热科学和能源工程系,安徽合肥230027

出　　处：《工程热物理学报》2013年第4期609-612,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50976113)

摘　　要：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。A model using PR equation of state and vdW mixing rule is employed to calculate the vapor-liquid equilibria （VLE） of ternary HFC/HC mixtures, in which the binary interaction parameter kij is predicted by the modified differential-model. The predicted results are compared with the experimental data of 5 ternary HFC/HC mixtures published in literatures （namely HFC32/HFC125/HFC134a, HFC290/HC600a/HFC32, HFC125/HFC143a/HFC134a, HFC32 /HC290/HFC227ea, HFC32/HFC125/HC290） and the calculated results of 12 ternary mixtures （R404A, R407A, R407B, R407C, R407D, R407E, R417A, R422A, R422B, R422C, R422D, R425A） in REFPROP 8.0 database. The overall average absolute deviations of pressures and vapor phase compositions of the predicted results are 1.29% and 0.0053. The results show a good agreement compared with the experimental data.

关 键 词：气液相平衡 三元混合工质 HFC HC 推算 

分 类 号：TB612[一般工业技术—制冷工程]