海底输油管道流量-温度调节特性研究

Study on Flowrate-Temperature Regulation Characteristics of Submarine Oil Pipeline

海底管道出口温度是控制原油安全输送的关键指标之一,然而流量调节会对温度的稳定性产生重要影响。利用OLGA软件构建了海底输油管道计算模型,模拟研究了正弦、方波、矩形脉冲和随机正态分布四种典型数学模型描述的流量条件下,管道输送过程中的流量-温度变化规律。结果表明:(1)当采用正弦调节方式时,海底管道的流量和温度调节特性的相似度较高,仅有出口温度的振幅会随入口流量周期的增大而增大;(2)当采用方波和矩形脉冲调节方式时,海底管道的流量和温度调节特性的相似度较低,仅有两者的周期相同;(3)当采用随机正态分布调节方式时,海底管道的流量和温度均服从正态分布,且两者标准差的变化趋势相同。

The outlet temperature of submarine pipeline is one of the key indicators to control the safe transportation of crude oil.However,the pressure regulation will have an important impact on the stability of temperature.The OLGA software is used to build the calculation model of the submarine oil pipeline,and the pressure-temperature variation law in the pipeline transportation process is simulated under the pressure conditions described by four typical mathematical models,namely,sinusoidal,square wave,rectangular pulse and random normal distribution.The results show that:(1)when the sinusoidal regulation mode is adopted,the similarity of the flow and temperature regulation characteristics of the submarine pipeline is high,and only the amplitude of the outlet temperature will increase with the increase of the inlet flow period;(2)when the square wave and rectangular pulse regulation modes are adopted,the similarity of the flow and temperature regulation characteristics of the submarine pipeline is low,and only the periods of the two are the same;(3)when the adjustment mode of random normal distribution is adopted,the pressure and temperature of the submarine pipeline follow the normal distribution,and the variation trend of their standard deviation is the same.