管道起伏对天然气温度分布的影响

根据能量和动量守恒原理,建立了体现非理想特性和高程变化影响的天然气管道输送热力计算模型.针对某气田实际运行的管道高程变化情况,计算了管道沿程压力和温度分布情况,结果表明,天然气温度在管道高程的峰处最低而在谷处最高,与水平管道相比,600m的高程变化会导致5℃的温度变化.

The influence of pipeline fluctuations on the temperature distribution of natural gas

A thermal-hydrodynamic model,involved the gravity as well as the variational specific enthalpy of natural gas with pressure and temperature,was set up for predicting the flow of natural gas in pipes buried in montanic area,and the numerical research was implemented.The result shows that the temperature distribution in montanic area is obviously difference from that in flat area;the minimum temperature appear at the peak of montanic area and the maximum appear at the valley even if the gravity was neglected;the temperature distribution can be affected by gravity obviously;the temperature difference would reach 5℃ if the altitude changes 600 m.