Research on Mechanical Smoke Exhaust Effect of Covered Train Operation Depot under Fire Condition
Taking a covered train operation dep-ot as an example,the effect of different smoke exhaust modes under fire condition is simulated and analyzed.When there is no sprinkler device,compared with me-chanical smoke exhaust alone,turning on the jet fan to assist mechanical smoke exhaust can effectively reduce the CO volume fraction and flue gas temperature,mak-ing the CO volume fraction in most areas far from the fire source lower than the limit value.When the jet de-pression angle of the jet fan is 7.5° downward,the CO volume fraction and flue gas temperature can be mini-mized.When there is a sprinkler device,turning on the jet fan to assist mechanical smoke exhaust can reduce the CO volume fraction and flue gas temperature,but the effect is not significant.From an economic point of view,for the operation depot with sprinkler device,in the event of a fire,it is not necessary to turn on the jet fan to assist mechanical smoke exhaust.
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