地铁屏蔽门系统站台空气品质数值模拟分析

Numerical Simulation Analysis on Platform Air Quality of Subway Screen Door System

采用Airpak 3.0建立了人体Block模型、颗粒物DPM模型以及屏蔽门系统岛式站台模型,并在建立模型过程中提出模型假设和模拟工况,对地铁站台公共区夏季四种客流工况进行数值模拟。根据国家公共区域的空气品质相关规定与标准,本文给出了包括CO2浓度、热舒适性和PM2.5浓度等在内的地铁站台空气品质评价标准。基于地铁站台空气品质的评价标准,对屏蔽门系统站台客流高峰与非高峰期CO2浓度、热舒适性、PM2.5浓度进行对比分析。结果表明,客流高峰期与非高峰期CO2浓度、热舒适性在人员呼吸区均满足要求,但PM2.5浓度超过了标准值;随着水平面高度的增加,CO2浓度以及PM2.5的质量浓度均有所下降。

Airpak 3.0 was used to establish the human Block model,particulate matter DPM model and island platform model of the screen door system.In the process of model establishment,model assumptions and simulation conditions were put forward to conduct numerical simulation of four passenger flow conditions in the public area of subway platform in summer.According to relevant provisions and standards of air quality in national public areas,this paper presented the evaluation standards of air quality of subway platforms,including CO2 concentration,thermal comfort and PM2.5 concentration.According to the air quality evaluation criteria of the air quality of the subway platform,the CO2 concentration,thermal comfort and PM2.5 concentration at the peak and off-peak passenger flow were compared and analyzed.It is concluded that at the peak and off-peak passenger flow period the CO2 concentration and the thermal comfort at the human breathing zone are lower than the criteria,but the PM2.5 concentration is over the criteria;the CO2 concentration and the PM2.5 concentration tends to decrease with the height increase from the platform ground.