CATEGORIES2022 Conference Papers Conference Papers
With the increasing area covered and the number of people served by subways due to rapid urbanization, air quality in subway stations on the health of passengers and staff has received increasing attention from society and scholars. In previous studies, the removal and control of underground pollutants have mainly focused on the indoor air conditioning and ventilation of metro stations rather than on optimizing architectural design. Therefore, this study focuses on the effect of subway entrance space layout on indoor particulate matter distribution. Our research selected three morphological indicators, namely, entrance direction, roof shape, and entrance height/width ratio, as the influencing factors. Indoor pollution in the form of subway entrances in different places was simulated after actual monitoring and verification. The results show that (1) the particle interception rate of the lateral entrance is twice as high as that of the forwarding entrance; (2) when the entrance height-width ratio is less than 1:1, the larger the entrance width is, the better the overall air quality of the subway station; (3) the abatement effect of roof morphology on the indoor particulate matter is ranked as sloping roof > flat roof > no roof. In general, the spatial morphology design can influence the entry of particulate matter into the metro station and reduce the direct infusion of outdoor pollutants through air convection and return flow.
Keyword: Metro stations; underground pollutants; CFD; spatial form; optimization strategy.