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Lossless storage and transportation law of 250m3 horizontal liquid hydrogen storage tank

In this paper, the effects of the initial filling rate and heat flux density on the natural convection inside the liquid hydrogen storage tank and the variation laws of temperature and pressure are studied. The study found that the optimal initial filling rate of the 250m3liquid hydrogen storage tank was 86%.When the initial filling rate is in the range of 35% to 95%, the change of the heat flux density has a greater impact on the self-pressurization phenomenon than the change of the filling rate. When the initial filling rate is lower than 35%, the pressure in the tank rises sharply, and the change of the initial filling rate has a great influence on the self-pressurization phenomenon. The high initial filling rate and high heat flux density make the pressure rise of the liquid hydrogen storage tank faster during the pressure recovery period. When the liquid hydrogen begins to evaporate in large quantities, the low filling rate and high heat flux make the tank pressure increase faster. By comparing the three thermodynamic models with the simulation results, it is found that the pressure deviation of the 250m3liquid hydrogen storage tank with a fillingrate of 86% is within 20% calculated by the three-zone model, which is the closest to the simulation results. The deviation of the surface evaporation model at high heat flux density and high filling rate reached 76% and 88.3%, respectively, which was the most affected calculation model by the change of heat flux density and initial filling rate.
PAPER REVISED: 2022-05-20
PAPER ACCEPTED: 2022-05-24
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