疫情防控期间有效增大地铁车站新风量的预测研究*
Forecast research on effectively increasing outdoor air rate of underground railway station during period of epidemic prevention and control
摘要：
疫情防控期间，随着复工企事业单位的增加，地铁乘客人数不断攀升，增加地铁车站新风量是降低车站有害物浓度、保障乘客健康安全的关键举措。基于现场屏蔽门风压实测，提出了考虑屏蔽门处、出入口处和楼梯处综合局部阻力情况下室外新风引入量预测模型。预测结果表明，在停站列车离站阶段延迟关闭车站两端共8扇屏蔽门1 min，在不增加设备，也无需对既有设备进行改造的情况下，可增大地铁车站新风量约33 653 m3/h，占既有最大设计新风量的94%。
Abstract：
During the period of epidemic prevention and control, with the increase of enterprises and institutions returning to work, the number of underground railway passengers is increasing. Increasing the outdoor air rate of underground railway station is a key measure to reduce the concentration of harmful substances in the station and ensure the health and safety of passengers. Based on the field measurement of the air pressure of the screen door, proposes a prediction model of outdoor air intake considering the combined local resistance of the screen door, the entrance and exit, and the stairs. The prediction results show that in the stage of train departure from the station, 8 screen doors at the two ends of the station are delayed to close for 1 min, without adding equipment or modifying existing equipment, the outdoor air rate of the underground railway station can be increased by about 33 653 m3/h, accounting for 94% of the maximum design outdoor air rate.
Keywords:underground railway station, outdoor air rate, screen door, delay closing, epidemic prevention and control