Numerical Simulation and Evaluation of Mechanical Smoke Exhaust in a Loop Corridor of a High-Rise Hotel

摘要

The mechanical smoke exhaust is as acknowledged as an effective smoke control manner by making use of some necessary exhaust facilities, also with more stability than natural exhaust. In this paper, the field model Fire Dynamic Simulator (FDS) with a combination of zone model Consolidate Fire and Smoke Transport (CFAST) were used to simulate the mechanical smoke exhaust in a loop corridor of the fire floor in a high-rise hotel, for the propose of evaluate fire safety of mechanical smoke exhaust. There were several factors under discussion, such as the arrangement of smoke vents, quantity of smoke vents, the volume of smoke exhaust, the position of the smoke vents and height of ceiling indoor. The conclusions were obtained as followed. When two exhaust vents were set symmetrically in the loop corridor, one of which was located nearby the fire room, the smoke exhausted better. The volume of smoke exhaust per unit area with 60 m~3/h according to regulations could always ensure safety of smoke exhaust. The smoke exhausted worse within the corridor when ceiling height reduced. It was recommended that the lowest ceiling height limit should be provided in correlative regulation.