Simulation and safety analysis of the leakage of liquefied hydrogen from high-pressure container

Abstract

Original scientific paper https://doi.org/10.2298/TSCI180411117WIn this paper, the leakage and diffusion of liquefied hydrogen which is stored in high-pressure container were investigated and the safety arrangement in cosmodrome focused on the effects of external flow on the above process was proposed. The phase transition process of leakage of liquefied hydrogen at the initial stage was first analyzed by considering the motion of single particle and particle group. Furthermore, the rule of leakage and diffusion of liquefied hydrogen under different conditions was thoroughly examined by CFD modelling. Through this work, the leakage pressure, leakage location, external air-flow direction and external air-flow velocity are found to have great effects on the diffusion of leaking hydrogen. By increasing the leakage pressure and putting leakage port closer to ground, the diffusion and dilution of leaking hydrogen would be strongly expedited to spread much further away. By adopting upper air blow and raising the external air speed, the concentration can be fairly reduced.

Study on Liquid Hydrogen Leakage and Diffusion Behavior in a Hydrogen Production Station

“…Jin et al [8] established a three-dimensional transient CFD model of cryogenic liquid hydrogen and analyzed the evaporation of cryogenic hydrogen and the diffusion of gaseous hydrogen as well as the influence of environmental factors on the leakage-diffusion behavior of liquid hydrogen. Wu et al [9] investigated the leakage-diffusion behavior of liquid hydrogen under different working conditions using a CFD model, and Pu et al [10] conducted numerical simulation studies on the leakage-diffusion behavior of liquid hydrogen containers in open space. Yuan et al [11] modeled China's first liquid hydrogen refueling station in Pinghu using FLACS to simulate liquid hydrogen leakage.…”