蓄冷能力对液氢贮箱蒸气冷却屏瞬态特性的影响  

Effect of Cooling Storage Capacity on the Transient Characteristics of the Vapor Cooled Shield for Liquid Hydrogen Storage Tank

作　　者：蒋文兵[1,2] 胡聪 孙培杰 李鹏 黄永华 JIANG Wenbing;HU Cong;SUN Peijie;LI Peng;HUANG Yonghua(Institute of Refrigeration and Cryogenics,Shanghai Jiao Tong University,Shanghai 200240,China;Aerospace System Engineering Shanghai,Shanghai 201108,China)

机构地区：[1]上海交通大学制冷与低温工程研究所,上海200240 [2]上海宇航系统工程研究所,上海201108

出　　处：《工程热物理学报》2023年第5期1161-1168,共8页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.51936006);上海航天先进技术联合研究基金(No.USCAST2019-4)。

摘　　要：蒸气冷却屏可有效降低贮箱漏热,延长低温流体贮存时间。为明确间歇性排气下蒸气冷却屏是否有足够的蓄冷能力能够在短时排气过程中充分蓄存/回收低温气体冷量,本文针对液氢贮箱绝热结构建立了耦合真空多层绝热与蒸气冷却屏的瞬态传热模型,研究了间歇性排气下液氢贮箱外部绝热结构和内部气液相的热力参数变化规律,讨论了绝热结构瞬态温度分布随蒸气冷却屏蓄冷能力的变化特性,对比分析了蓄冷能力对蒸气冷却屏绝热性能的影响。Vapor cooled shield(VCS)can effectively reduce the heat leakage into the cryogenic tanks thus extending the storage duration of the cryogenic fluids.To determine whether the VCS has sufficient cooling storage capacity to fully store/recover the cold energy from the emitted cryogenic vapor during the intermittent venting process,a transient heat transfer model combining vacuum multi-layer insulation,VCS and liquid hydrogen tank was established.The thermodynamic parameters variations of the external insulation structure and the internal fluid of the tank have been investigated.Subsequently,the dynamic response of the insulation structure temperature distribution to the VCS cooling storage capacity was discussed.In addition,the effect of the VCS cooling storage capacity on its insulation performance was compared.

关 键 词：蓄冷能力 蒸气冷却屏 多层绝热 瞬态特性 

分 类 号：TK91[动力工程及工程热物理]