埋地热油输送管道的经济管径计算模型

Calculation Model for Economic Pipe Size of Buried Heated Oil Transportation Pipelines

考虑了输送温度对油品粘度的影响以及油品粘度和输送量对泵效、流态和经济管径的影响,以管道建设投资的年分摊费用、保温投资的年分摊费用、管道年维护费用、年动力消耗费用和年热力消耗费用之和为目标函数,给出了埋地热油管道经济管径的完整计算模型。该模型能自动满足管道的沿程温降约束条件,适用于不同粘温特性的原油、不同保温材料和不同埋地深度的管道。采用斐波那契搜索算法对所建模型进行了算例计算,结果表明,该模型能较好地反映各种因素对经济管径的影响,可为埋地热油管道的优化工艺设计提供理论依据。

Considering the effect of oil transportation temperature on oil viscosity and the oil viscosity and flow-rate on pump efficiency,flow regime and economic pipe size,using the sum of the shared cost per year of pipeline and thermal insulation engineering construction investigation,the maintenance cost per year of the pipeline,the electric power and heat power consumption cost per year in pipeline running as the object function,a complete calculation model for economic pipe size of buried heated oil transportation pipeline is given in the paper.The model can satisfy oil temperature drop constraint condition along the pipeline automatically,suitable for crude oils with different viscosity-temperature characteristics,different thermal insulation materials and the pipeline of different burying depth.A calculation is carried out with the model applying Fibonacci Search Algorithm and results show that the model can reflect various factors well to the impacts on the economic pipe size and provide a theoretical basis for optimized technological design of buried heated oil pipelines.