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Clean Technologies and Environmental Policy
Published in: Clean Technologies and Environmental Policy 6/2014

01-08-2014 | Original Paper

Status of PM in Seoul metropolitan subway cabins and effectiveness of subway cabin air purifier (SCAP)

Authors: Jong-Bum Kim, Seyoung Kim, Gwang-Jae Lee, Gwi-Nam Bae, Youngmin Cho, Duckshin Park, Duck-Hee Lee, Soon-Bark Kwon

Published in: Clean Technologies and Environmental Policy | Issue 6/2014

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Abstract

The increasing importance of indoor air quality management on public transport led the Korean government to amend the indoor air quality control in public use facilities, etc. Act including modes of public transport under the Act from June 2013. Particulate matter (PM) in subway systems is reported as being mostly generated by friction—between the wheels and the rails, between the wheels and the brake pads, and between the catenaries and the pantographs. In order to reduce PM level in subway cabins, a newly developed subway cabin air purifier (SCAP) was installed on the ceilings of the cabins. In this study, we analyzed indoor PM concentrations through continuous measurement of PMs less than 10 μm in diameter (PM10) and PMs less than 2.5 μm in diameter (PM2.5) in the cabins of line 2 and line 5 of the Seoul metropolitan subway network, comparing the concentrations in cabins where SCAP devices were installed to cabins without them in order to verify SCAP effectiveness. In both cabins with and without SCAP, the ratio of indoor to outdoor PM10 (I/O for PM10) showed a two-times higher value in line 5 than in line 2, which indicated that the entirely underground line 5 was less ventilated with outdoor air. In addition, the ratio of indoor PM2.5/PM10 showed that coarse mode PM was more abundant in line 5 due to poor ventilation in the tunnel sections compared to that of line 2. Regarding the effectiveness of SCAP, it was found that changes of PM10 concentrations in line 2 and line 5 were from 132.8 to 112.2 μg/m3 (15.5 % efficiency) and from 154.4 to 114.2 μg/m3 (26.0 % efficiency) after SCAP installation, respectively.
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Metadata
Title
Status of PM in Seoul metropolitan subway cabins and effectiveness of subway cabin air purifier (SCAP)
Authors
Jong-Bum Kim
Seyoung Kim
Gwang-Jae Lee
Gwi-Nam Bae
Youngmin Cho
Duckshin Park
Duck-Hee Lee
Soon-Bark Kwon
Publication date
01-08-2014
Publisher
Springer Berlin Heidelberg
Published in
Clean Technologies and Environmental Policy / Issue 6/2014
Print ISSN: 1618-954X
Electronic ISSN: 1618-9558
DOI
https://doi.org/10.1007/s10098-013-0708-1

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