Feasibility study on natural smoke exhaust in all underground and high space of Wuhan Optics Valley Plaza Complex

Studies the design scheme effect using natural smoke exhaust when fire resulted from baggage occurs at the most unfavorable fire source position in the all underground and high space of Wuhan Optics Valley Plaza Complex. Analyses the smoke spread process, visibility, temperature field and CO concentration in case of fire by simulation. The result shows that the smoke can effectively exhaust from natural smoke exhaust windows set in the top when fire occurs in all underground and high space and there will be a safe environment for personnel evacuating. In the rising process of smoke, the decoration ceiling has obvious smoke-blocking effect. The efficiency of natural smoke exhaust decreases with the decrease of the ceiling hollowing rate. Suggests that the ceiling hollowing rate should be more than 33% to ensure the effective smoke exhaust and safe personnel evacuation.