Size resolved particle number emission factors of motorway traffic differentiated between heavy and light duty vehicles

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Title:	Size resolved particle number emission factors of motorway traffic differentiated between heavy and light duty vehicles
Authors:	柯奧圖;Nickel, Carmen;Kaminski, Heinz;Hellack, Bryan;Quass, Ulrich;John, Astrid;Klemm, Otto;Kuhlbusch, Thomas A. J.
Contributors:	地球科學學院大氣科學學系
Date:	2013-01-01
Issue Date:	2026-04-21 13:38:14 (UTC+8)
Publisher:	AAGR Aerosol and Air Quality Research;Cham: Springer International Publishing
Abstract:	摘要： It is well accepted that airborne particles can induce adverse health effects dependent on the source, composition, morphology and size. Studies indicate that ultrafine particles (diameter < 100 nm) are of specific importance. Therefore, upwind and downwind field measurements of particle number size distributions (14–750 nm), nitrogen oxides, PM 10 and PM 1 mass concentrations were performed to derive information on sources of those types of particles from motorways. The measurement stations were located at a motorway in a rural area with flat terrain and unhindered air flow situation. The mean particle number concentration was 20,900 #/cm 3 downwind and 3,400 #/cm 3 upwind of the motorway. The highest total particle number concentration at the downwind station was 141,000 #/cm 3 . About 90% of these particles were < 100 nm. The measured data were used to derive size-dependent emission factors (EF) using the NO x tracer method. This method is based on listed NO x EF (HBEFA, 2010). The average total particle number EF per vehicle was determined to be 3.5 × 10 14 particles/km. The average particle EF was 2.1 × 10 14 particles/km and 11.8 × 10 14 particles/km for light duty vehicles (LDV) and heavy duty vehicles (HDV). The higher EF for HDV is mainly caused by particles with diameters below 50 nm. The comparison of EF from the literature show the importance of the particle size range investigated. Especially particles at the lower size detection limit contribute to total particle number concentrations and hence determine the EF significantly. In the EURO V directive, particle number emission limits of 6 × 10 11 particles/km were set for diesel passenger cars. This value is defined for non-volatile particles > 23 nm. The EF for the given size range (> 23 nm) determined in this study were significantly higher with 1.0 × 10 14 for LDV. 其他題名： Aerosol Air Qual. Res 出版者： Cham: Springer International Publishing 出版日期： 2013 出處： Aerosol and air quality research, 2013, Vol.13 (2), p.450-461 版權： Taiwan Association for Aerosol Research 2013 識別號： ISSN: 1680-8584 識別號： ISSN: 2071-1409 識別號： EISSN: 2071-1409 識別號： DOI: 10.4209/aaqr.2012.07.0187
Appears in Collections:	[Department of Atmospheric Sciences] journal & Dissertation

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