储氢温度对加氢站泄漏爆炸事故的影响研究OA北大核心CSTPCD

Lowering the temperature of hydrogen allows for higher density storage,effectively enhanc-ing storage and transportation efficiency.To investigate the influence of hydrogen storage temperature on the risk of leakage and explosion incidents at hydrogen refueling stations,FLACS software was used to analyze the diffusion and explosion of hydrogen following a leakage from a tube trailer within the station under different storage temperatures(50 K,100 K,200 K,and 300 K).The study results indicated that with the decrease in hydrogen storage temperature,the time for the combustible gas cloud to stabilize,its diffusion range,and the cryogenic burn areas all increased after a high-pressure hydrogen jet hit the explosion-proof wall.Meanwhile,the maximum explosion overpressure and explo-sion hazard distance initially increased and then decreased.The distance for minor cryogenic burns at a storage temperature of 50 K was nearly twice that at 100 K and seven times that at 200 K,with severe cryogenic burns covering the largest areas.The peak overpressure from cloud explosions at 100 K was nearly triple that of a standard-temperature hydrogen explosion,with the largest hazard area.At a stor-age temperature of 200 K,the time to reach peak explosion overpressure was the shortest,whereas at 50 K,it was the longest.