水平管内油气两相混合物的传热计算

Heat Transfer Calculation of Oil-Gas Two-phase Flow in Horizontal Pipes

随着油气田开发的不断深入,油气两相混输技术的使用越来越广泛,这就涉及到水平管内油气两相混合物的传热计算问题。鉴于水平管内油气两相流动的复杂性,以三种常用简化计算的假设为基础,分别建立均相传热模型、分相传热模型以及流型传热模型,同时运用Aspen EDR软件对油气两相传热进行计算。将计算结果与工程实际设计值进行对比分析可知,均相传热模型与实际值相差最大;而流型传热模型最接近实际值,其相对误差仅2.6%;分相传热模型与软件计算值误差则介于这两者之间。另外,通过改变流速,对各个模型得出的油气两相传热系数进行了对比分析。

Considering the complexity of oil-gas two-phase flow in horizontal pipes and based on three simplified calculating assumptions, established homogeneous model, separated model and flow regime model for heat transfer calculation, and the Aspen EDR software also was used for calculating. A comparative analysis between the calculation results and the result of engineering design was made. The error between actual value and result obtained from homogeneous model was maximal, the result of regime model was the closest one to the actual value and the relative error was only 2.6%, the error of the result obtained from separated model and the value calculated with Aspen EDR was between the two above. In addition, the heat transfer coefficients of oil-gas two-phase flow obtained from different models were compared and analyzed by changing the flow velocity.