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On particulate emissions from individual trains in tunnel environments
KTH, School of Industrial Engineering and Management (ITM).
KTH, School of Industrial Engineering and Management (ITM).ORCID iD: 0000-0003-2489-0688
2016 (English)In: Civil-Comp Proceedings, ISSN 1759-3433, Vol. 110Article in journal (Refereed) PublishedText
Abstract [en]

In order to detect the concentrations and size distributions of airborne particles that were generated by individual moving trains on an underground railway platform, a series of real-time measurements were undertaken. The measurement range covered the ultrafine (less than 100 nm) and partly the fine (100 nm to 2.5 μm), but not the coarse fraction (2.5 to 10 μm). The results show that the individual trains with stop and start at the platform elevate substantially the particulate number concentrations with a diameter size greater than 100 nm. Two size modes of the particulate number concentrations are obtained. One mode peaks around 170 nm when a train stopped/started, while the other is around 30 nm when no train operated in the station. By using principal component analysis, four components are extracted from the thirty two-analyzed particulate sizes, indicating four different contributors in those detected particles. It is revealed from this study that the particulate matter released by individual moving trains (mainly through mechanical wear and turbulent resuspension) is a key contributing source of the fine particles on underground railway platforms, which can be separated from the background by their different size distributions. © Civil-Comp Press, 2016.

Place, publisher, year, edition, pages
Civil-Comp Press , 2016. Vol. 110
Keyword [en]
Airborne particulates, Individual train, Particulate concentration, Principal component analysis, Size distribution, Tunnel environment, Particle size analysis, Particles (particulate matter), Railroad transportation, Railroads, Airborne particle, Airborne particulate, Number concentration, Particulate Matter, Real time measurements, Tunnel environments, Underground railway, Railroad tunnels
National Category
Transport Systems and Logistics
URN: urn:nbn:se:kth:diva-186780ScopusID: 2-s2.0-84964355247OAI: diva2:928556

QC 20160516

Available from: 2016-05-16 Created: 2016-05-13 Last updated: 2016-05-16Bibliographically approved

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Olofsson, Ulf
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