Temperature Field of Batch Transportation of Cool and Hot Oil in Western Crude Pipeline
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摘要: 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.Abstract: It is important for safe operation to determine temperature field of crude oil pipeline well and truly.The mathematic model for solving unstable thermal and hydrodynamic problems in the process of batch transportation of cool and hot oil is established,and calculation software is also developed.As an example,the process of batch transportation of four types of oil in western crude pipeline is simulated by the calculation software.The calculation results show that the maximum difference under varied simulating time appears in the inlet of heat stations,i.e.the longer distance between heat stations,the longer time of simulation.The precision requirements of temperature field considering the operation time as a month can be satisfied.The effect of initial temperature filed on the operation course becomes weak with shorter distance between adjacent heat stations because the temperature error can accumulate in the inlet of stations.
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