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자료유형
학술저널
저자정보
저널정보
한국대기환경학회 한국대기환경학회지(국문) 한국대기환경학회지 제24권 제2호
발행연도
2008.4
수록면
153 - 161 (9page)

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The guidelines for indoor air quality of public transportations such as subway, train and bus was presented by Korean Ministry of Environment last end of year 2006 based on the great consequence of indoor air quality in daily life. Two main parameters, carbon dioxide (CO₂) and particulate matters smaller than 10 ㎛(PM₁?), were selected as index pollutants for the management of indoor air quality. The former pollutant, CO₂, is regarded as index of ventilation status and the major source of CO₂ in the train or subway is the exhalation of passengers. It is publically perceived that the high CO₂ concentration in a crowded subway will be reduced and ventilated with outdoor air by door-opening taken every 2 or 3 minutes when the train stops each station. However, there has not been any scientific proof and quantitative information on the effect of door-opening on the CO₂ reduction by ventilation with outdoor air. In this study, CO₂ concentration and number of passengers were measured at each station on the 3 lines of Korail metropolitan subway. In order to evaluate the effect of CO₂ reduction by door opening, the theoretical approach using the CO₂ balance equation was performed. By comparing the predicted data with monitoring one, the optimum CO₂ dilution factor was determined. For the first time, it was quantified that about 35% of CO₂ concentration in the subway indoor was removed by the door-opening at each station.

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