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Field measurement and estimation of ventilation flow rates by using train-induced flow rate through subway vent shafts |
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| Authors: | Kyoung Bin Lee Jin Soo Park Myung Do Oh Sung Joon Bae Shin Do Kim |
| Affiliation: | 1. Department of Environmental Engineering, University of Seoul, Seoul, 130-743, Korea 2. Department of Climate and Air Quality Research, National Institute of Environmental Research, Incheon, 404-708, Korea 3. Department of Mechanical and Information Engineering, University of Seoul, Seoul, 130-743, Korea 4. Research Institute of Technology, Seoul Metro, Seoul, Korea |
| Abstract: | This study measured and estimated the subway vent shaft air flow rate induced by moving trains in the tunnel. This work estimated the flow rate via the tunnel structure and train movement to determine the quantitative effect of vent shafts as air purification systems of natural ventilation to improve the air quality management of a subway. The amount of air suctioned into the tunnel is significantly larger than that vented from the tunnel. Thus, placing vent shafts near subway stations is desirable for natural ventilation systems. Experimental approaches to measure train-induced flow rates have not yet been published. Results of this study provide useful fundamental data to study the natural ventilation in a subway. Therefore, this study suggested the significant design factors required to control indoor air quality in a subway. |
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