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热原油管道温度场的准确计算对管道的安全运行具有重要意义.建立了描述冷热油交替输送过程中非稳态水力、热力问题的数学模型,开发了计算软件,并对西部原油管道交替输送4种原油进行了模拟计算.结果表明:考虑不同管道运行历史得到的管道沿线油品温度最大偏差一般出现在进站位置,即管道加热站间距离越长,建立同样精度的温度场需要的管道运行历史越长.在当前算例范围内,考虑前一个月的管道运行历史计算得到的温度场即可满足工程精度要求.由于任意位置温度场的计算偏差都会累积到进站位置,因此随着站间管道距离的减小,初始温度场对运行过程的影响趋弱.
The accurate calculation of thermal crude oil pipeline temperature field is of great significance to the safe operation of the pipeline.The mathematical model describing the unsteady hydraulic and thermal problems during the alternate transportation of hot and cold oil is established, the calculation software is developed and the crude oil pipelines in western China are alternately transported Four kinds of crude oil were simulated.The results show that the maximum deviation of oil temperature along the pipelines considering the operation history of different pipelines generally occurs at the pit stop position, that is, the longer the distance between heating stations of the pipeline, the pipeline required to establish the same precision temperature field The longer the operating history, the more accurate the temperature accuracy calculated in the pipeline operation history of the previous month within the scope of the current study. Since the calculated deviation of the temperature field will accumulate to the entering station at any position, The decrease of pipeline distance between stations, the influence of initial temperature field on the operation process is weaker.