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

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Frontiers in Energy 2020年第3期14卷 570-577页

作者： Jianpeng ZHENG Liubiao CHEN Ping WANG Jingjie ZHANG Junjie WANG Yuan ZHOU Chinese Academy of Sciences Key Laboratory of Cryogenics Technical Institute of Physics and ChemistryBeijing 100190China University of Chinese Academy of Sciences Beijing 100190China Chinese Academy of Sciences State Key Laboratory of Technologies in Space Cryogenic Propellants Technical Institute of Physics and ChemistryBeijing 100190China

liquid hydrogen(LH2)attracts widespread attention because of its highest energy storage ***,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 *** 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 *** results show that the combination of HGMs and VCS can effectively reduce heat flux into the LH2 *** the increase of VCS number from 1 to 3,the minimum heat flux through HGMs decreases by 57.36%,65.29%,and 68.21%,*** significant advantage of HGMs is that their thermal insulation properties are not sensitive to ambient vacuum *** 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

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Prospects of sea launches for Chinese cryogenic liquid-fueled medium-lift launch vehicles

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Chinese Journal of Aeronautics 2021年第1期34卷 424-437页

作者： Zhengyu SONG Zhifeng XIE Limin QIU Dalin XIANG Jinglin LI China Academy of Launch Vehicle Technology Beijing 100076China Beijing Institute of Astronautical Systems Engineering Beijing 100076China College of Energy Engineering Zhejiang UniversityHangzhou 310027China

This paper introduces the sea-launch technology of a cryogenic liquid-fueled medium-lift *** first reviews the current state of sea launch technology,and then gives a brief introduction of China’s New Generation Medium-lift Launch Vehicle(NGMLV).The innovations in the NGMVL,such as responsive test and launch control,a H3 launch model,and unmanned operations,provide convenience for sea *** on these innovations,this paper proposes a sea launch scheme,including the system configuration,test and launch processes,and an improved adaptive design for the ***,the launch platform is discussed in detail,which integrates the functions of sea transportation,assembly and test,as well as technical and launch *** layout and function divisions,fluid filling,gas supply and distribution systems,and lossless storage technology of LH2 are described in *** breakthrough in sea launch technology will enable China to launch medium and large satellites and constellations‘both on land and sea’,especially into low-inclination Low-Earth Orbits(LEOs),and it allows China to remain competitive in the fast-paced space industry.

关键词： Autonomous operations Launch platform Launch vehicles liquid hydrogen storage Sea launches

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