液氢箱蒸气冷却屏/仲-正转化复合结构绝热性能预测  

Thermal Insulation Performance Prediction of Integrated Composite Insulation Combining VCSwith Para–orthohydrogen Conversion for Liquid Hydrogen Tank

作　　者：黄奕宁 梁佳佳 周振君 张少华[2] 王磊 马原 厉彦忠[1] HUANG Yining;LIANG Jiajia;ZHOU Zhenjun;ZHANG Shaohua;WANG Lei;MA Yuan;LI Yanzhong(Institute of Refrigeration and Cryogenic Engineering,Xi′an Jiaotong University,Xi′an 710049,China;China Academy of Launch Vehicle Technology,Beijing 100076,China)

机构地区：[1]西安交通大学制冷与低温工程研究所,西安710049 [2]中国运载火箭技术研究院,北京100076

出　　处：《真空与低温》2023年第5期459-468,共10页Vacuum and Cryogenics

基　　金：国家自然科学基金(51976151)。

摘　　要：为探析蒸气冷却屏中仲-正转化释冷对于液氢贮箱绝热性能的提升效果,建立了设置仲-正绝热转化室的VD-MLI/VCS二维模型。对复合绝热结构的传热规律和绝热性能开展了多角度分析。研究发现:仲-正转化室布置在VCS管长50%处时绝热效能最佳,贮箱漏热为0.101 W·m^(−2),相比不设置仲-正转化室减少了7.17%;绝热设计中,调整VCS位置能最多减少54.17%漏热损失,相比调整仲-正转化室位置效果更显著;沿冷蒸气流动方向,漏热量先升高、再降低,随后再次升高;增加仲-正转化室可提升VCS出口侧的绝热效果,使贮箱各处绝热性能更加均匀。该研究为液氢贮箱的复合绝热结构设计提供更加准确的理论依据和技术支撑。To explore the effect of Parahydrogen–Orthohydrogen(P-O)conversion applied to vapor-cooled shield on the insulation performance of liquid hydrogen storage tanks,a two-dimensional VD-MLI/VCS model with a P-O adiabatic conversion chamber was established.The heat transfer law and insulation performance of the composite insulation structure were analyzed from multiple perspectives.The results show that the optimal insulation efficiency is achieved when the P-O conversion chamber is arranged at 50%of the VCS pipe length,with a heat leak of 0.101 W·m^(−2),which is reduced by 7.17%compared to not setting the P-O conversion chamber.In the thermal insulation design,adjusting the VCS position can reduce the heat leak by 54.17%at most,which is more significant than adjusting the position of the P-O conversion chamber.Along the flow direction of the cryogenic hydrogen gas,the heat leak first increases,then decreases,and then continues to increase.The conversion chamber improves the insulation performance on the outlet side of VCS,making the insulation performance of various parts of the storage tank more consistent.This study provides more accurate research tools and results support for the design of composite insulation structures for liquid hydrogen storage tanks.

关 键 词：液氢 气冷屏 转化释冷 二维建模 绝热性能 

分 类 号：TB657[一般工业技术—制冷工程]