Influence of Fire Curtain on Smoke Exhaust and Personnel Evacuation of Covered Operation Depot
Taking a typical covered high-speed train application depot in a certain city as the research object,and using the volume fraction of CO in smoke,smoke temperature,visibility and required evacuation time during a fire as indicators,the coupling model of Pathfinder software model and PyroSim software model is applied to simulate the influence of fire locations(western fire source,central fire source and eastern fire source)in the covered application depot and the pres-ence or absence of fire curtains on smoke spread con-trol and personnel evacuation.The results show that with a fire curtain,when the three fires in the west,central and east fire sources occur for 600 s respective-ly,there is a large amount of smoke gathered at the east wall of the covered application depot,while there is no smoke gathered on the west side;The three indicators of smoke temperature,CO volume fraction and visibility near the fire sources all exceed the human tolerance value;The three indicators at the escape exit do not ex-ceed the human tolerance value,and personnel can safely evacuate through the escape exit.When a fire occurs in the central fire source for 600 s,without a fire curtain,the visibility is lower than the human tolerance value,which affects personnel evacuation;With a fire curtain,the visibility inside the curtain is lower than the human tolerance value,which affects personnel e-vacuation,and the personnel evacuation outside the curtain is not affected.The effect of the fire curtain on the spread of smoke is very obvious.After a fire,the most important factor affecting the personnel evacuation is visibility.For the 10 working conditions studied,the average available evacuation times with and without fire curtains are 600.0 and 367.2 seconds,respectively,the average required evacuation times are 205.0 and 240.1 seconds,and the average margin times are 395.0 and 127.2 seconds,respectively.Setting up fire curtains can effectively shorten the required evacuation time,increase margin time,and increase the safety of personnel evacuation.
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