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Title: Numerical studies on emergency ventilation system in public transport interchanges
Authors: Qu, L
Chow, WK 
Keywords: Public transport interchanges
Emergency ventilation
Smoke control
Computational fluid dynamics
Issue Date: 2009
Source: International Symposium CIB-W096 2009 Taiwan - Future Trends in Architectural Management, Tainan, Taiwan, 2-3 November 2009 How to cite?
Abstract: Public Transport Interchanges are built to facilitate different transport in high density cities. Smoke is identified to be a hazard as smoke obscuration will make some egress unusable. This paper aims to evaluate the performance of emergency ventilation system in an example public transport interchange including subway station and bus terminal. Luggage fire on platform with different ventilation operations are simulated numerically to identify if there is a tenable environment for the evacuation of passengers. Computational fluid dynamics model - Fire Dynamics Simulator (FDS V5) is used to predict smoke spread and the available safe egress time during the fire. It is demonstrated that luggage fire on platform can cause serious consequence if the emergency ventilation system is not operating normally. Mechanical ventilation system can be useful in delaying the spread of fire and smoke, while the smoke impacts the evacuation egress in a short time and the smoke obscuration will make some egress unusable and thus prolong the evacuation time. It shows that appropriate incorporation of fire and smoke effects is important in the evaluation of evacuation.
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