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原油差温顺序输送是指顺序输送具有不同流动特性的原油时,根据安全与节能的需要,调整油品加热温度以节约能耗的一种管输技术。建立了埋地原油管道差温顺序输送的数学模型,提出了移位网格下的虚拟边界条件法。编制了较为严格的非稳态水力-热力耦合计算程序,可用于管道设计与运行阶段出站温度、流量和压力随时调整,以及地温、原油物性和土壤物性发生变化的条件下,任意油品种类数与油品排列次序,任意批次数与批次量的工艺计算。利用新大管道原油差温顺序输送现场测试数据对模型进行了验证,结果表明各批次原油进站温度实测值与计算值的平均偏差较小,最大为1.4℃。(表5,图19,参15)
Crude oil differential temperature sequential delivery refers to the sequential delivery of crude oil with different flow characteristics, according to the needs of safety and energy saving, adjust the oil heating temperature in order to save energy consumption of a pipe transport technology. A mathematical model of differential temperature sequential transportation of buried crude oil pipeline was established and a virtual boundary condition method was proposed. A more rigorous unsteady hydraulic-thermal coupling calculation program is compiled, which can be used to adjust the temperature, flow rate and pressure at the outstation of the pipeline design and operation stage, as well as the change of ground temperature, crude oil physical properties and soil physical properties under the conditions of any oil type Number and oil arrangement order, the number of any batch and batch process calculation. The model was verified by the on-site test data of differential temperature transmission of crude oil in the new large pipeline. The results show that the average deviation between measured and calculated values of crude oil entering stations in each batch is small, with a maximum of 1.4 ℃. (Table 5, Figure 19, reference 15)