Study on the adiabatic performance of cryogenic liquid spherical tank with insulating glass microspheres
Insulating glass microspheres were considered to be the thermal-insulating materials for large liquid hydrogen spherical tanks because of their excellent thermal-insulating performance and low maintenance cost.Based on a liqiud hydrogen spherical tank with 1 m3 for test,while liquid nitrogen(LN2)was filled to 50％and 80％,the static evaporation rates of LN2 were measured at 2.19％and 2.53％respectively.The apparent thermal conductivity of the insulation layer with the insulating glass microsphere is 1.19 × 10-3 W/(m·K)by experiment and 1.85 × 10-3 W/(m·K)by the theoretical formula.The evap-oration rate of the liquid hydrogen tank with insulating glass microsphere and 25 m3was predicted to be 0.81％.
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