纯氢与掺氢天然气管道摩阻系数预测  

Prediction of friction coefficient of pure hydrogen and hydrogen-blending natural gas pipeline

作　　者：朱建鲁[1] 吕浩 王鑫 周慧 刘翠伟[1] 李玉星[1] 李璐玲 段鹏飞 任诚 ZHU Jianlu;LYU Hao;WANG Xin;ZHOU Hui;LIU Cuiwei;LI Yuxing;LI Luling;DUAN Pengfei;REN Cheng(College of Pipeline and Civil Engineering,China University of Petroleum-East China,Qingdao,Shandong 266580,China;China Petroleum Technology Development Co.,Ltd.,Beijing 100083,China;Shenzhen Gas Group Co.,Ltd.,Shenzhen,Guangdong 518000,China;Sinopec Hunan Petrochemical Co.,Ltd.,Yueyang,Hunan 414000,China)

机构地区：[1]中国石油大学(华东)储运与建筑工程学院 [2]中国石油技术开发有限公司 [3]深圳市燃气集团有限公司 [4]中石化湖南石油化工有限公司

出　　处：《天然气工业》2024年第5期127-135,共9页Natural Gas Industry

基　　金：国家重点研发计划课题“纯氢与掺氢燃气管道输送及其应用科技试验平台”(编号:2021YFB4001605)。

摘　　要：纯氢与掺氢天然气管道是实现氢气长距离、大规模输送的最佳方式之一,其中摩阻系数是气体管道水力计算的关键参数,现有的经验公式不能满足预测掺氢天然气的摩阻系数要求。为改进传统的摩阻系数计算公式在纯氢与掺氢天然气管道系统的适用性,搭建了纯氢和掺氢天然气管输调压综合实验平台,开展纯氢和不同比例的掺氢天然气管输流动实验,根据实验采集的流量、温度、压力和管道的长度、管径等参数计算管道的摩阻系数,同时建立了摩阻系数与雷诺数、粗糙度之间的关系,并修正了传统摩阻系数公式,最后利用湖南省巴陵—长岭纯氢气管道的实际运行数据进行了验证。研究结果表明:①由于氢气与天然气物性差异较大,掺氢比会影响流动摩阻系数,相同条件下掺氢比越大摩阻系数越小;②传统摩阻系数计算公式存在30%左右的误差,创新提出的适用于纯氢和掺氢天然气的3段式摩阻系数经验公式,相对误差最大11.84%,能够有效降低误差;③与巴陵—长岭纯氢气管道实际的运行数据相比,修正后摩阻系数预测公式的平均误差为0.62%,该公式可以满足实际工程的误差要求。结论认为,得到的纯氢与掺氢天然气管道摩阻系数修正公式可应用于纯氢与掺氢天然气管道工程设计,具有重要的工程应用价值和前景。Pure hydrogen or hydrogen-blending natural gas pipeline is one of the best means to realize long-distance and large-scale hydrogen transportation.Friction coefficient is a key parameter in the hydraulic calculation of gas pipeline,but the existing empirical formula fails to meet the requirement of friction coefficient prediction of hydrogen-blending natural gas.In order to improve the applicability of the traditional formula for calculationg friction coefficient in the pure hydrogen and hydrogen-blending natural gas pipeline system,this paper establishes a comprehensive experimental platform for pressure regulation of pure hydrogen and hydrogenblending natural gas pipeline,and conducts flow experiments of pure hydrogen and different proportions of hydrogen-blending natural gas pipeline transport.Then,the friction coefficient of line pipes is calculated based on the parameters acquired in the experiments,such as flow rate,temperature,pressure,pipeline length and pipe diameter.In addition,the relationships between friction coefficient and Reynolds number and roughness are established,and the traditional friction coefficient formula is modified.Finally,it is verified by using the actual operation data of Baling-Changling pure hydrogen pipeline(Hunan Province).And the following research results are obtained.First,the large difference in physical properties between hydrogen and natural gas results in an effect of the hydrogen blending ratio on flow friction coefficient.Under the same conditions,the larger the hydrogen blending ratio is,the smaller the friction coefficient.Second,the traditional friction coefficient calculation formula has an error of about 30%.The innovatively proposed three-section friction coefficient empirical formula suitable for pure hydrogen and hydrogen-blending natural gas can reduce the error effectively,with the maximum relative error of 11.84%.Third,compared with the actual operation data of Baling-Changling pure hydrogen pipeline,the average error of the modified friction coefficient predi

关 键 词：管道输送 氢气 掺氢 天然气 摩阻系数 公式修正 管输工艺设计 

分 类 号：TE832[石油与天然气工程—油气储运工程]