等温输油管路的经济管径与界限输量计算模型

Calculation model of the economic diameter and critical flowrate of isothermal oil transportation pipeline

考虑了油品黏度和输送量对泵效、流态和经济管径的影响,以管道建设投资的年分摊费用、管道年维修费用和管道运行年能耗费用之和为目标函数,给出了等温输油管路经济管径和界限输量的完整计算模型.采用斐波那契搜索算法对所建模型进行了计算,计算表明,本模型适用于各种流态,能较好地反映黏度和输量对经济管径的影响,计算收敛性很好.模型对等温输油管路的技术经济设计提供了可靠的理论依据.

Considering the effects of oil viscosity and pipeline flowrate on pump efficiency,flow state and economic pipe diameter,using the sum of the allocated expense per year of pipeline construction investment,the pipeline maintenance expense per year and the energy consume expense per year for pipeline running as the objective function,the complete calculation model for the economic diameter and critical flowrate of the isothermal oil transportation pipeline are presented.The model is verified by a case.Fibonacci search algorithm is used in the calculation of the case.The result of the case shows that the model is suitable for various flow states,and it well reflects how the effects of oil viscosity and pipeline flowrate on the economic pipe diameter,and there is a better calculation convergence.The method provides a reliable theoretical basis for the economic design of the isothermal oil transportation pipeline.