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        The Effect of Platform Screen Doors on PM10 Levels in a Subway Station and a Trial to Reduce PM10 in Tunnels

        손윤석,Amgad Salama,정효선,Suhyang Kim,정진호,이재효,선우영,김조천 한국대기환경학회 2013 Asian Journal of Atmospheric Environment (AJAE) Vol.7 No.1

        PM10 concentrations were measured at four monitoring sites at the Daechaung station of the Seoul subway. The four locations included two tunnels, a platform,and a waiting room. The outside site of the subway was also monitored for comparison purposes. In addition, the effect of the platform screen doors (PSDs) recently installed to isolate the PM10 in a platform from a tunnel were evaluated, and a comparison between PM10 levels during rush and non-rush hours was performed. It was observed that PM10 levels in the tunnels were generally higher than those in the other locations. This might be associated with the generation of PM10 within the tunnel due to the train braking and wear of the subway lines with the motion of the trains, which promotes the mixing and suspension of particulate matter. During this tunnel study, it was observed that the particle size of PM10ranged from 1.8 to 5.6 μm. It was revealed that the PM10 levels in the tunnels were significantly increased by the PSDs, while those in the platform and waiting room decreased. As a result, in order to estimate the effect of ventilation system on PM10 levels in the tunnels,fans with inverters were operated. It was found that the concentration of PM10 was below 150 μg/m3when the air flow rate into a tunnel was approximately 210,000-216,000 CMH.

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        The Effect of Platform Screen Doors on PM<sub>10</sub> Levels in a Subway Station and a Trial to Reduce PM<sub>10</sub> in Tunnels

        Son, Youn-Suk,Salama, Amgad,Jeong, Hye-Seon,Kim, Suhyang,Jeong, Jin-Ho,Lee, Jaihyo,SunWoo, Young,Kim, Jo-Chun Korean Society for Atmospheric Environment 2013 Asian Journal of Atmospheric Environment (AJAE) Vol.7 No.1

        $PM_{10}$ concentrations were measured at four monitoring sites at the Daechaung station of the Seoul subway. The four locations included two tunnels, a platform, and a waiting room. The outside site of the subway was also monitored for comparison purposes. In addition, the effect of the platform screen doors (PSDs) recently installed to isolate the $PM_{10}$ in a platform from a tunnel were evaluated, and a comparison between $PM_{10}$ levels during rush and non-rush hours was performed. It was observed that $PM_{10}$ levels in the tunnels were generally higher than those in the other locations. This might be associated with the generation of $PM_{10}$ within the tunnel due to the train braking and wear of the subway lines with the motion of the trains, which promotes the mixing and suspension of particulate matter. During this tunnel study, it was observed that the particle size of $PM_{10}$ ranged from 1.8 to 5.6 ${\mu}m$. It was revealed that the $PM_{10}$ levels in the tunnels were significantly increased by the PSDs, while those in the platform and waiting room decreased. As a result, in order to estimate the effect of ventilation system on $PM_{10}$ levels in the tunnels, fans with inverters were operated. It was found that the concentration of $PM_{10}$ was below 150 ${\mu}g/m^3$ when the air flow rate into a tunnel was approximately 210,000-216,000 CMH.

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