A novel cryogenic insulation system of hollow glass microspheres and self-evaporation vapor-cooled shield for liquid hydrogen storage  

作　　者：Jianpeng ZHENG Liubiao CHEN Ping WANG Jingjie ZHANG Junjie WANG Yuan ZHOU 

机构地区：[1]Chinese Academy of Sciences Key Laboratory of Cryogenics,Technical Institute of Physics and Chemistry,Beijing 100190,China [2]University of Chinese Academy of Sciences,Beijing 100190,China [3]Chinese Academy of Sciences State Key Laboratory of Technologies in Space Cryogenic Propellants,Technical Institute of Physics and Chemistry,Beijing 100190,China

出　　处：《Frontiers in Energy》2020年第3期570-577,共8页能源前沿（英文版）

基　　金：This research was supported by the State Key Laboratory of Technologies in Space Cryogenic Propellants,China(Grant No.SKLTSCP1903);the National Natural Science Foundation of China(Grant Nos.51706233,51427806,and U1831203);the Strategic Pilot Projects in Space Science of China(Grant No.XDA15010400);the Key Research Program of Frontier Sciences of Chinese Academy of Sciences(Grant No.QYZDY-SSW-JSC028).

摘　　要：Liquid hydrogen(LH2)attracts widespread attention because of its highest energy storage density.However,evaporation loss is a serious problem in LH2 storage due to the low boiling point(20 K).Efficient insulation technology is an important issue in the study of LH2 storage.Hollow glass microspheres(HGMs)is a potential promising thermal insulation material because of its low apparent thermal conductivity,fast installation(Compared with multi-layer insulation,it can be injected in a short time.),and easy maintenance.A novel cryogenic insulation system consisting of HGMs and a selfevaporating vapor-cooled shield(VCS)is proposed for storage of LH2.A thermodynamic model has been established to analyze the coupled heat transfer characteristics of HGMs and VCS in the composite insulation system.The results show that the combination of HGMs and VCS can effectively reduce heat flux into the LH2 tank.With the increase of VCS number from 1 to 3,the minimum heat flux through HGMs decreases by 57.36%,65.29%,and 68.21%,respectively.Another significant advantage of HGMs is that their thermal insulation properties are not sensitive to ambient vacuum change.When ambient vacuum rises from 10^-3 Pa to 1 Pa,the heat flux into the LH2 tank increases by approximately 20%.When the vacuum rises from 10^-3 Pa to 100 Pa,the combination of VCS and HGMs reduces the heat flux into the tank by 58.08%-69.84% compared with pure HGMs.

关 键 词：liquid hydrogen storage hollow glass microspheres(HGMs) self-evaporation vapor-cooled shield(VCS) thermodynamic optimization 

分 类 号：TQ116.27[化学工程—无机化工]