Field research on operating performance of underground railway station environmental control system in severe cold zone

Selects two underground railway stations in severe cold zone to measure the operating performance of the environmental control systems of the stations in different seasons throughout the year and the temperature change in the rail area without the exhaust fan at the rail bottom. The results show that the temperature of the hall and platform of underground railway stations in severe cold zone is lower than the design requirements in winter, and it is necessary to reduce the adverse effects of cold air penetration. The piston effect of trains has a significant impact on the station, and the penetration of outdoor air at the entrance and exit during closed operation and open operation can meet the outdoor air requirement of personnel. Considering that the temperature in the public area is far lower than the design specification requirements, the mechanical ventilation system can be turned off. The influence of train stop on the temperature of the rail bottom is less than 1 ℃, and the cancellation of rail bottom exhaust fan will not cause high rail bottom temperature.