Updated insights on ventilation and air conditioning system in underground railway

By comparison and analysis on the system function and operation strategy of conventional ventilation and air conditioning system in underground railway, discovers some problems in the conventional system, and proposes the suggestions on system optimization. Points out that the advantages in both of screen door system and open-closed system are concentrated in the system of ventilative platform screen door. This system is basically fit for all temperature zones and of great advantage and feasibility. Unfavorable working conditions of ventilation exist in the ventilation system of tunnel, so it is necessary to optimize the rail heat rejection system, as well as the operation strategies of rail heat rejection system and piston air system and the operation strategy in blocking condition. The separated air supplying system in public area and equipment room in stations has great advantages in energy saving, economy and other aspects.