Research of the cold shield in cryogenic liquid storage
Research of the cold shield in cryogenic liquid storage
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DOI：
10.1088/1757-899x/278/1/012194
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发表时间：
2017-12
期刊：
影响因子：
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通讯作者：
L. Chen;J. Zheng;X. Wu;C. Cui;Y. Zhou;J. Wang
中科院分区：
文献类型：
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作者：
L. Chen;J. Zheng;X. Wu;C. Cui;Y. Zhou;J. Wang
为了实现低温液体的零蒸发储存，通常需要能够实现低于低温液体沸点温度的低温冷却器。考虑到低温冷却器在较高的工作温度下效率会更高，提出了一种新型隔热系统，该系统使用填充有较高沸点的低温液体的夹层容器作为低温罐和室温真空屏蔽之间的冷辐射屏蔽，以减少电力消耗。采用两级制冷器或两个独立的制冷器来冷凝来自冷屏和低温罐的蒸发气体。带有液氮防护罩的55升液氢罐的计算结果表明，仅需要14.4 W的电力即可使所有蒸发的气体冷凝，而没有液氮防护罩则需要121.7 W的电力。
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.