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ISSN : 1738-4125(Print)
ISSN : 2287-7509(Online)
Journal of Odor and Indoor Environment Vol.6 No.4 pp.237-250

Characterization of Subway MVAC System in Seoul

Young Min Jo, Kun Li, Jung Hee Jang
Dept. of Environmental Science & Engineering, Green Energy Research Group, Kyunghee University


Seoul is one of the most dynamic capital cities in the world of which population is about 10.49 million.The air quality of Seoul subway is a great concern to users and the public authorities, especially thepollution of particulate matters. The metallic particulate matters are generated from the friction of wheelsand subway rails, which causes dispersion into the platform and even to the trains. This study attempted tocharacterize the current filters in subway MVAC system and a newly developed filter which was a type ofthin electret fiber bundle. Collection efficiency of the filtration system varies from 20% to 90% dependingon filter life and dust particle size. The removal of fine dust with diameter smaller than 1㎛, which could notbe well achieved by current filtration system, is very important in the subway air cleaning system. The newelectret filter was found to have a high potential for the use in subway MVAC with high collection efficiency,especially for fine mode dust.