Search

The development of hydrogen energy industry is an important measure for China to achieve the goal of "carbon peak and carbon neutrality", accelerate green and low-carbon development, and comprehensively improve resource utilization efficiency. Compared with high-pressure gaseous hydrogen storage, solid hydrogen storage and other hydrogen storage methods, low temperature liquid hydrogen storage has the advantages of high effective hydrogen storage density, low transportation cost, high vaporization purity and low storage and transportation pressure, so it is the most potential hydrogen storage method for high-power fuel cells. In this paper, Fluent is used to perform unsteady calculations on the liquid hydrogen supply system of a high-power marine fuel cell, and study the minimum gas hydrogen charging speed required to completely discharge the liquid hydrogen in the tank within a given time. The numerical simulation results show that during the process of high-temperature gas hydrogen filling into the liquid hydrogen tank, there is a local high temperature at the entrance due to heat accumulation. The hydrogen enters the liquid hydrogen tank and flows in the horizontal direction, flowing downward under the action of gravity and the wall, and through the convection heat transfer with the low-temperature fluid in the tank, it will change the fluid density in different areas, so that the gas hydrogen and liquid hydrogen produce vortices respectively. [ABSTRACT FROM AUTHOR]