热油管道温度响应特征研究

Study on Temperature Response Characteristics of Hot Oil Pipelines

加热输送管道的温度是控制其安全、经济运行的关键参数之一,工程实践中管道很难达到理论意义上的稳定输送状态。针对埋地热油管道,建立了管道下游对上游的温度动态响应模型。选取四种理论上具有代表性的上游温度边界,考虑土壤动态蓄热的影响,研究下游温度的响应特征。结果表明,当上游温度渐变时,下游温度与上游温度的相似度较好;当上游温度突变时,下游温度与上游温度的相似度较差;当上游温度按正态分布随机变化时,下游温度也满足正态分布,其均值与标准差同时减小。

Improving the transportation temperature is one of the key parameters to ensure the safe and economic operation oFheating transportation pipelines, and pipelines can hardly reach the theoreti- cally steady state in the engineering practice. For buried hot oil pipelines, a temperature dynamic re- sponse model From downstream to upstream is developed. With four theoretical upstream temperature boundaries and the influence of the dynamic heat storage of soil, the response Features of-the down- stream temperature are studied. The results show that the similarity between the downstream and up- stream temperature is higher when the upstream temperature gradually changes, and the similarity is lower when the upstream temperature suddenly changes; when the upstream temperature changes ran- domly according to the normal distribution, the downstream temperature also Follows the normal distri- bution, and its average valueand standard deviation also decrease at the same time.