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Spatial Distribution of Fine Particulate Matter in Underground Passageways

1
Center for Intelligent Transportation Systems and Unmanned Aerial Systems Applications, State Key Laboratory of Ocean Engineering, School of Naval Architecture, Ocean & Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
2
China Institute for Urban Governance, Shanghai Jiao Tong University, Shanghai 200240, China
3
Department of Urban and Regional Planning, University of Florida, Gainesville, FL 32611, USA
*
Authors to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2018, 15(8), 1574; https://doi.org/10.3390/ijerph15081574
Received: 9 June 2018 / Revised: 20 July 2018 / Accepted: 23 July 2018 / Published: 25 July 2018
(This article belongs to the Section Environmental Science and Engineering)
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Abstract

The unfavorable locations of underground infrastructures and poor ventilation facilities can result in the deterioration of enclosed air quality. Some researchers have studied air quality and ventilation measures in different types of underground buildings. However, few studies have investigated the pollution in pedestrian passageways connecting underground structures. Hence, in this paper, we attempted to investigate the spatial distribution of fine particulate matter (PM2.5) in underground passageways. First, measurements were designed and conducted in a pedestrian passageway beneath the Shanghai South Railway Station, Shanghai, China. Second, numerical simulations were performed based on computational fluid dynamic (CFD) technology. Finally, the numerical simulations were extended to examine impacts of the ventilation measures on PM2.5 concentration with different inlet positions and air velocity in underground passageways. The simulation results showed good agreement with the experimental data, and the numerical model was validated to be an effective method to investigate the spatial distribution of PM2.5 in underground passageways. Results suggest that building additional entrances is an advisable method for improving air quality in the underground passageways of the Shanghai South Railway Station, while jet fans are not recommended. Findings of this study offer suggestions for mitigating PM2.5 pollution in underground passageways. View Full-Text
Keywords: underground passageway; ventilation; PM2.5; computational fluid dynamic (CFD) underground passageway; ventilation; PM2.5; computational fluid dynamic (CFD)
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Song, X.-Y.; Lu, Q.-C.; Peng, Z.-R. Spatial Distribution of Fine Particulate Matter in Underground Passageways. Int. J. Environ. Res. Public Health 2018, 15, 1574.

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