Performance-based design of mechanical exhaust in theater auditorium

Theater auditorium is generally tall and large space, and does not divide the fire compartment, the mechanical exhaust smoke volume designed according to the codes will be too large. Designs the smoke exhaust system of a theater auditorium with the performance-based analysis method, calculates the mechanical exhaust smoke volume by formula of smoke production rate in the U.S. NFPA92B firstly, and then verifies the security of the mechanical exhaust smoke volume with the smoke and personnel evacuation simulation under typical scenario. The result shows that the performance-based mechanical exhaust design method can greatly reduce the mechanical exhaust smoke volume of the theater auditorium.