VENTILATION METHOD FOR UNDERGROUND SYSTEM Russian patent published in 2015 - IPC E21F1/08 

FIELD: ventilation.

SUBSTANCE: method involves ambient air supply to the station through a ventilation chamber and removal of waste air via tunnels, cross passages and another ventilation chamber. At movement of trains along the line the ambient air is supplied to the station through the ventilation chamber installed on one end face of the station simultaneously via the channels with which the same ventilation chamber is connected to the station and to the tunnel, via which the train departs from the station, and waste air is removed from the station through the ventilation chamber installed on the other end face of the station simultaneously via the channels with which the same ventilation chamber is connected to the station and to the tunnel via which the train arrives at the station. At absence of train movement along the line, the ambient air is supplied to the station through any of the above said ventilation chambers by having switched off the other one, and waste air is removed through ventilation chambers of adjacent stations connected for removal. In case of the train fire at the station the channels with which both ventilation chambers of the station are connected to the tunnels are shut off, and the ventilation chamber through which ambient air is supplied to the station is switched over to an extraction mode, thus removing smoke-filled air from the station simultaneously via the channels with which both ventilation chambers are connected to the station, and ambient air is supplied to the station through pedestrian routes. In case of train fire in the tunnel between adjacent stations, at the station to which passengers being evacuated are moving the ventilation chamber that is the closest to an emergency train is switched over to an inflow mode, and ambient air is supplied through it and through the channel with which the same ventilation chamber is connected to the tunnel to the emergency train, and at the other of the above said adjacent stations the ventilation chamber that is the closest to the emergency train is switched over to the extraction mode, and smoke-filled air is removed from the tunnel with the emergency train through the channel with which the same ventilation chamber is connected to the tunnel to the emergency train; with that, valves are closed in cross passages of the section of the line with the emergency train, and dampers are closed, which are installed at portals with which the tunnel with the emergency train is connected to the adjacent stations.

EFFECT: uniform removal of excess heat from tunnels under stationary operating conditions of ventilation and provision of specified air velocities on passenger escape routes in case of train fire at the station and in the tunnel.

4 dwg