冷热原油交替输送管道周围土壤温度场的数值模拟

Numerical Simulation on Soil Temperature Field Around Pipelines in the Process of Alternative Transportation of Cool-Hot Crude Oil

制定科学合理的冷热原油输送工艺,需要准确预测埋地管道周围土壤温度场和管内油品温度变化情况。提高预测的准确性,在计算过程中要考虑管外环境和管内油品温度等多种因素的影响。用有限元法对冷热原油交替输送过程中埋地管道周围土壤温度场和管内油品温度进行了数值计算,得出了不同时刻埋地管道周围土壤温度的分布和管内油品沿程温度变化情况。计算结果表明,输油温度、输油时间、土壤的蓄热等对管内油品温度变化有很大影响,制定节能的冷热原油交替输送工艺要充分考虑其影响。

It is very important to accurately forecast the change of soil temperature field around underground pipeline and inside pipeline oil temperature for drawing up scientific and reasonable crude oil transportation craft. To increase the accuracy of estimate, outside pipeline environment and inside pipeline oil temperature as well as various other factors should be taken into consideration during the calculating process. The temperature field of soil around underground pipeline in the process of cool and hot crude oil alternative transportation was numerically simulated by using finite elements method the soil temperature distributions around pipeline and inside pipeline oil temperature at different time were obtained. Through analyzing the calculation results, it turns out that oil-line temperature, oil-line time and heat accumulation of soil influence inside pipeline oil temperature. When drawing up the craft of cool and hot crude oil alternative transportation, the influence should be considered.