Effects of the PED on smoke control of subway station fires

In subway station fires, the most immediate threat to passengers' life is not the direct exposure to fire, but the smoke inhalation because it contains hot air and toxic gases, so it is important to research the efficient smoke control model. In this paper, the fires are respectively located on the carriages of the train and the middle of the two stairs on the left side to simulate the smoke diffusion by CFD and using k-Ε types of the three-dimension turbulence model, effects of the PED on smoke control have been compared. And the results indicate that 6mins can be obtained with PED, the efficiency of smoke-exhausting is also raised up 10% which make the obvious fall of the temperature in the platform, and the effects are obvious, people can evacuate safely and effectively in time. This research provides a new idea and method for smoke control and personnel evacuation from subway station fires.