Winter ventilation strategies and effect analysis of underground railway stations with platform screen doors

Tests two underground railway stations with platform screen doors in hot summer and cold winter zone. Compares the ventilation effects and environmental parameters of the original winter ventilation strategy and shutdown strategy. The results show that there is excessive outdoor air supply in public area with the original winter ventilation strategy. Piston effect caused by the periodic departure and arrival of trains leads to considerable outdoor air intake through entrances which accounts for more than 65% of the total outdoor air supply, while the mechanical outdoor air supply accounts for the less proportion. Without mechanical ventilation, outdoor air intake through entrances is 2.8×104 to 4.9×104 m3/h, which can satisfy the people demand even in rush hours and guarantee the CO2 concentration less than 800×10-6 during the monitoring period.