LNG大管径堆积绝热输送管道用于液氢转注的可行性数值研究  

Numerical study on feasibility of LNG large diameter stacked adiabatic transfer pipeline for liquid hydrogen transfer

作　　者：陈锐莹 姜夏雪 徐皓晗 陆新宇 高歌 朱少龙 王凯[3] Chen Ruiying;Jiang Xiaxue;Xu Haohan;Lu Xinyu;Gao Ge;Zhu Shaolong;Wang Kai(CNOOC Gas&Power Group,Research&Development Center,Beijing 100028,China;CNOOC Key Laboratory of Liquefied Natural Gas and Low-Carbon Technology,Beijing 100028,China;Institute of Refrigeration and Cryogenics,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]中海石油气电集团技术研发中心,北京100028 [2]中国海洋石油集团有限公司液化天然气及低碳技术重点实验室,北京100028 [3]浙江大学制冷与低温研究所,杭州310027

出　　处：《低温工程》2025年第2期85-95,共11页Cryogenics

基　　金：中国海洋石油集团有限公司科技项目(KJQZ-2023-0017)。

摘　　要：为了评估LNG接收站卸液管道用于液氢转注的可能性,采用CFD数值方法,建立液氢管道热流固耦合模型,分析了管道所受动态热应力分布与管道稳态漏热。热流固耦合分析结果表明:管道热应力分布与分层流流型具有显著联系,热应力呈现明显的顶底差异。该型管道在分阶段预冷使用低温氢气进行初步预冷情况下,转注液氢时等效热应力能够满足液氢转注要求。稳态漏热分析结果显示该型管的堆积绝热结构外表面漏热量为16.77 W/m,尚无法到达同等尺寸合格真空绝热管漏热指标,需优化绝热结构以满足液氢转注绝热需求。To evaluate the feasibility of using LNG receiving terminal unloading pipelines for liquid hydrogen transfer,a thermal-fluid-solid coupling model for liquid hydrogen pipelines was es-tablished with CFD numerical methods,the dynamic thermal stress distribution and steady-state heat leakage of the pipeline were analyzed.The results of the thermal-fluid-solid coupling analysis indicate that the distribution of thermal stress in pipelines is significantly related to the stratified flow pattern,and there is a noticeable difference in thermal stress between the top and bottom of the pipeline.Under a phased precooling scheme using low-temperature hydrogen gas for initial cooling,the equivalent thermal stress during liquid hydrogen transfer meets the required stand-ards.The steady-state heat leakage analysis shows that the heat leakage from the outer surface of the insulation structure of this type of pipeline is 16.77 W/m,which does not meet the heat leak-age standards for a vacuum-insulated pipe of the same size.Therefore,the insulation structure needs to be optimized to meet the thermal insulation requirements for liquid hydrogen transfer.

关 键 词：低温管道预冷 热流固耦合 动态热应力 液氢转注 

分 类 号：TB658[一般工业技术—制冷工程]