Abstract
Air quality monitoring was carried out at the three stations A, B and C of Line 1, Line 2 and Line 9 of Shenyang Subway station. CO2, formaldehyde, TVOC and PM2.5 were selected as pollutants. The results indicate that because the platform floor is far from the ground and there is almost no natural ventilation, the concentration of pollutants is higher than that of the station hall floor. The formaldehyde concentration of the newly built site A exceeded the standard by 37.1%. CFD was used for numerical simulation, and the section with human respiratory height Z=1.5m was selected as a typical section. The cloud map of temperature, velocity and concentration distribution of typical pollutants were analyzed to find out the areas where the concentration of pollutants exceeded the standard and analyze the reasons. The layout of tuyere which can improve the air quality in subway station is proposed, and the simulation and optimization research is carried out.
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