摘要
液氢具有高密度、可常压下保存的优点,比高压气氢更适合于储存和运输。在目前的液态储存气态加注型加氢站中,储存的液氢需要增压和气化,在空温式气化器中变成高压气态超临界氢后才可加注。对于空温式气化器的设计,目前仅有基础的传热学计算公式作为指导,缺乏对高压(45 MPa)超临界流体所用的特殊结构气化器传热特性的探究。采用数值模拟方法,利用Fluent软件对包括内外流场和管壁固体域在内的整体耦合传热模型进行计算。以得到的总体传热系数为参考,对气化器的特殊结构、空气域的温度和流动状态、超临界氢流域的入口温度和流量进行探究。探究结果有助于相似气化器的设计计算,也为气化器在实际运行时的总体布置提供参考。
Liquid hydrogen has the advantages of high density and being able to be stored at atmospheric pressure,making it more suitable for storage and transportation than high-pressure gaseous hydrogen.In current liquid storage gas refueling hydrogen refueling stations,the stored liquid hydrogen needs to be pressurized and gasified,and can only be used for fueling after being transformed into high-pressure gaseous supercritical hydrogen in an Air Ambient Vaporizer(AAV).For the design of AAV,currently only basic heat transfer calculation formulas are used as guidance,and there is a lack of exploration of the heat transfer characteristics of specialized vaporizer used for high-pressure(45 MPa) supercritical fluids.The numerical simulation methods and Fluent software were used to calculate the overall coupled heat transfer model,including the internal and external flow fields and the solid domain of the pipe wall.Using the obtained overall heat transfer coefficient as a reference,the special structure of the vaporizer,the temperature and flow state of the air domain,and the inlet temperature and flow rate of the supercritical hydrogen were discussed.The results are helpful for the design and calculation of similar vaporizers,and also provide reference for the overall layout of vaporizers during actual operation.
作者
刘家宁
杨靖丞
钟文荣
师存阳
吴昊
唐建伟
钱学峰
薛明喆
朱绍伟
张存满
LIU Jianing;YANG Jingcheng;ZHONG Wenrong;SHI Cunyang;WU Hao;TANG Jianwei;QIAN Xuefeng;XUE Mingzhe;ZHU Shaowei;ZHANG Cunman(Clean Energy Automotive Engineering Center,School of Automotive Studies,Tongji University,Shanghai 201804,China;Suzhou Xinrui Cryogenic Plant Co.,Ltd.,Suzhou 215105,Jiangsu,China;School of Mechanical Engineering,Tongji University,Shanghai 201804,China)
出处
《真空与低温》
2024年第4期408-416,共9页
Vacuum and Cryogenics
基金
国家重点研发计划(2020YFB1506204)。
关键词
高压超临界氢
空温式气化器
流固耦合传热
数值模拟
high-pressure supercritical hydrogen
AAV
fluid structure coupling heat transfer
numerical simulation
