适用于含水天然气输送管道工艺计算的热力学模型

THERMODYNAMIC MODEL USED FOR THE PROCESS CALCULATION OF WET GAS TRANS MISSION PIPELINE

针对含水天然气输送管道的热力学计算，分析了组分模型与黑油模型以及不同状态方程的使用范围，提出了用于含水天然气输送管道的热力学计算模型和方法，即组分模型和管道内相平衡计算方法。计算结果表明组分模型不仅可以准确地计算含水天然气物性参数，而且能够计算凝析与反凝析以及气液相间的质量传递；明显优于黑油模型；与实际运行管道数据相比误差较小。

In view of the thermodynamic calculation of wet gas transmission pipeline,the compositional model,black oil model and the use scope of different state equations are analyzed,and the thermodynamic calculation model and method for wet gas transmission pipeline,i.e.compositional model and calculating method of the phase equilibrium in pipeline,are put forward.The calculation results show that by use of compositional model,not only the physical parameters of wet gas can be exactly calculated,but the condensation and retrograde condensation as well as the mass transfer between gas phase and liquid phase can be calculated also.Compositional model is obviously better than black oil model and by comparing it with the actual running data of pipeline,its error is smaller.