Fire ventilation systems in a Platform Screen Doors equipped metro station

Scope of this paper is to analyze a way to investigate an admissible solution for fire ventilation systems installed in a metro station equipped with Platform Screen Doors (PSD). Fire ventilation is related to fire scenarios involving generic events on the rolling stock present in the station. In order to evaluate capability and efficiency of desmoking systems, computational fluid dynamics analysis (CFD) have been developed, using Fire Dynamics Simulator software (FDS). Analysis have involved simulations in a model where different system configurations are applied. In all these models the railway platform area is delimited from the truck area by means of PSD system. System configurations assumed during the design provide for the possibility to operate ventilation from the train side using side and upper ventilation as well as platform level ventilation. Final ventilation strategies using under platform ventilation obtained excellent results in term of smoke and compliance of tenability criteria.