Abstract: Using volume translation method to improve the calculation of the accuracy of liquid density for the SRK state equation ,so has no influence on the gas -liquid balance. On the basis of SRK state equation and volume translation method and PR state equation, more accurate calculation results of the density of saturated liquid were obtained. And the results were compared with the measured data of different methods.The results show that the calculation results of saturated liquid density using volume translation method are more accurate than using the SRK state equation or PR state equation and improved the scope of the application of SRK state equation.

Key words:  , Volume translation method , Fluid density , Forecast , Numerical simulation , Validation

摘要： 为改进SRK状态方程计算液相密度的准确性,又不影响气-液平衡计算结果,常采用体积平移法。
在分别介绍SRK状态方程及其体积平移法的基础上,对SRK 状态方程、体积平移法及PR状态方程计算液相密度
的模型进行求解,开发出计算程序,并将各类模型的预测值与现场实测分析数据进行了对比。结果表明,实现体积
平移法后的预测精度较平移前和PR状态方程预测精度高,验证了体积平移法的有效性。

关键词: 体积平移法 , 液相密度 , 预测 , 数值模拟 , 验证