Research of the cold shield in cryogenic liquid storage

Cryogenic Engineering Conference 2017

材料科学;物理学

Chen, L.B.^1,2 ; Zheng, J.P.^1,2 ; Wu, X.L.^1,2 ; Cui, C.^1 ; Zhou, Y.^1,2 ; Wang, J.J.^1,2

Chinese Academy of Sciences Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Beijing

100190, China^1

University of Chinese Academy of Sciences, Beijing

100049, China^2

关键词: Boiling-point temperature;    Calculation results;    Cryogenic tanks;    Electrical power;    Gas condensation;    Liquid hydrogen tanks;    Operating temperature;    Thermal insulation systems;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/278/1/012194/pdf
DOI  :  10.1088/1757-899X/278/1/012194

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

To realize zero boil-off storage of cryogenic liquids, a cryocooler that can achieve a temperature below the boiling point temperature of the cryogenic liquid is generally needed. Taking into account that the efficiency of the cryocooler will be higher at a higher operating temperature, a novel thermal insulation system using a sandwich container filled with cryogenic liquid with a higher boiling point as a cold radiation shield between the cryogenic tank and the vacuum shield in room temperature is proposed to reduce the electricity power consumption. A two-stage cryocooler or two separate cryocoolers are adopted to condense the evaporated gas from the cold shield and the cryogenic tank. The calculation result of a 55 liter liquid hydrogen tank with a liquid nitrogen shield shows that only 14.4 W of electrical power is needed to make all the evaporated gas condensation while 121.7 W will be needed without the liquid nitrogen shield.