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Technical note: Experiences of studying airborne wear particles from road and rail transport
KTH, Skolan för industriell teknik och management (ITM), Maskinkonstruktion (Inst.), Maskinelement. KTH, Skolan för teknikvetenskap (SCI), Centra, Järnvägsgruppen, JVG.
KTH, Skolan för industriell teknik och management (ITM), Maskinkonstruktion (Inst.), Maskinelement.
KTH, Skolan för industriell teknik och management (ITM), Maskinkonstruktion (Inst.), Maskinelement. KTH, Skolan för teknikvetenskap (SCI), Centra, Järnvägsgruppen, JVG.ORCID-id: 0000-0003-2489-0688
2013 (Engelska)Ingår i: Aerosol and Air Quality Research, ISSN 1680-8584, Vol. 13, nr 4, s. 1161-1169Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Airborne particles and their adverse effects on air quality have been recognized by humans since ancient times. Current exhaust emission legislations increase the relative contribution of wear particles on the PM levels. Consequently, wearbased particle emissions from rail and road transport have raised concerns as ground transportation is developing quickly. Although scientific research on airborne wear-based particles started in 1909, there is almost no legislation that control the generation of wear-based particles. In addition, there is no accepted and approved standard measurement technique for monitoring and recording particle characteristics. The main objective of this study is to review recent experimental work in this field and to discuss their set-ups, the sampling methods, the results, and their limitations, and to propose measures for reducing these limitations.

Ort, förlag, år, upplaga, sidor
2013. Vol. 13, nr 4, s. 1161-1169
Nyckelord [en]
Airborne particles, measurement, non-tailpipe, non-exhaust, wear
Nationell ämneskategori
Tribologi (ytteknik omfattande friktion, nötning och smörjning) Naturresursteknik
Forskningsämne
Järnvägsgruppen - Tribologi
Identifikatorer
URN: urn:nbn:se:kth:diva-109495DOI: 10.4209/aaqr.2012.10.0295ISI: 000323893300002Scopus ID: 2-s2.0-84880591966OAI: oai:DiVA.org:kth-109495DiVA, id: diva2:582700
Anmärkning

QC 20130802

Tillgänglig från: 2013-01-06 Skapad: 2013-01-06 Senast uppdaterad: 2018-01-11Bibliografiskt granskad
Ingår i avhandling
1. Towards elimination of airborne particles from rail traffic
Öppna denna publikation i ny flik eller fönster >>Towards elimination of airborne particles from rail traffic
2013 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

Since the investigation of wear particles from rail transport started in the late 1910s, the high mass concentrations of these particles have prompted concern among researchers interested in air quality. However, effective action has yet to be taken because relevant knowledge is still missing. This thesis provides knowledge of airborne wear particles originating from rail transport. Some aspects of their characteristic parameters, such as size, mass concentration, number concentration, and morphology, were investigated in the field and in laboratory tests. We also discuss means to mitigate non-exhaust emissions, as well as the advantages and disadvantages of various test set-ups in the seven appended journal papers:Paper A reviews recent studies of exhaust and non-exhaust emissions from rail vehicles. The results, measurements, adverse health effects, and proposed or applied solutions presented in this literature are summarized in this paper.Paper B summarizes the results of field tests we conducted. The effects of curve negotiation and braking under different real conditions were investigated in a field test in which on-board measurements were made. The elemental composition and morphology of the particles emitted and their potential sources were also investigated.Paper C describes how a pin-on-disc machine can be used to reproduce real operating conditions during mechanical train braking in a controlled laboratory setting. The results were validated by comparing the field test results with the results of laboratory studies.Paper D presents comprehensive results of laboratory studies of airborne particles from different braking materials. A new index is introduced in this paper, which can be used as a quantitative metric for assessing airborne wear particle emission rates.Paper E describes the effects of using various friction modifiers and lubricants on the characteristics of airborne particles from wheel–rail contact under lubricated and unlubricated conditions.Paper F reports work to simulate thermoelastic instability in the cast-iron braking material. We simulated the fluctuation of the flash temperature by considering the temperature dependency of the material properties and the transformation of the contact state due to thermomechanical phenomena and wear.Paper G reviews new full- and sub-scale measurements of non-exhaust emissions from ground transport. The advantages and disadvantages of on-board measurements, pin-on-disc tests, dynamometer tests, and test rig studies are discussed in this paper.

Ort, förlag, år, upplaga, sidor
Stockholm: KTH Royal Institute of Technology, 2013. s. 37
Serie
Trita-MMK, ISSN 1400-1179 ; 2013:11
Nyckelord
Airborne, brake block, brake pad, railway, subway, TEI, wheel–rail, wear
Nationell ämneskategori
Tribologi (ytteknik omfattande friktion, nötning och smörjning)
Forskningsämne
Järnvägsgruppen - Tribologi
Identifikatorer
urn:nbn:se:kth:diva-131372 (URN)978-91-7501-881-2 (ISBN)
Disputation
2013-11-22, F3, Lindstedtsvägen 26, KTH Royal Institute of Technology, Stockholm, 14:00 (Engelska)
Opponent
Handledare
Anmärkning

QC 20131025

Tillgänglig från: 2013-10-25 Skapad: 2013-10-14 Senast uppdaterad: 2018-01-11Bibliografiskt granskad

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Olofsson, Ulf

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