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Estimation of Diffusion Direction and Velocity of PM10 in a Subway Station (For Gaehwasan Station of Subway Line 5 in Seoul)  

Park, Jong-Heon (서울도시철도공사 기술본부)
Park, Jae-Cheol (서울도시철도공사 환경관리팀)
Eum, Seong-Jik (서울도시철도공사)
Publication Information
Journal of Korean Society of Transportation / v.28, no.5, 2010 , pp. 55-64 More about this Journal
Abstract
In order to prepare an efficient solution for PM10 reduction in underground stations, the authors measured PM10 concentration levels every 30 minutes in the concourse, platform, and tunnel of Gaehwasan Station of Seoul's subway line 5. Through a correlation analysis of each changing pattern of PM10 concentration, the direction and velocity of diffusion in underground stations were estimated. The PM10 concentration levels were highest in the tunnel, followed by the platform and concourse. PM10 concentrations in the tunnel, platform, and concourse showed a pattern of increasing in the rush hours and decreasing in the non-rush hours. According to the statistical analysis of PM10 concentrations and changing patterns in each location, the higher PM10 concentration in the tunnel expanded to the platform, and some from the platform expanded to the concourse. Therefore, to efficiently reduce PM10 concentrations, it is essential to detect the centralized generation, diffusion factor, expanding route, expanding measure, and other variables and to remove or reduce the diffusion factor and level. Through operating the ventilation system in the right time frame while the PM10 concentration level increases, the power consumption and peak power consumption can be reduced.
Keywords
Subway Station; PM10; Diffusion Direction; Diffusion Velocity; Ventilation System;
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Times Cited By KSCI : 6  (Citation Analysis)
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