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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472
EISSN: 1735-2630
Vol. 12, No. 4, 2015, pp. 1261-1268
Bioline Code: st15116
Full paper language: English
Document type: Research Article
Document available free of charge

International Journal of Environment Science and Technology, Vol. 12, No. 4, 2015, pp. 1261-1268

 en Impacts of load mass on real-world PM1 mass and number emissions from a heavy-duty diesel bus
Wang, C.; Wu, Y.; Jiang, J.; Zhang, S.; Li, Z.; Zheng, X. & Hao, J.

Abstract

On-road emission profiles of ultra-fine particle matter with aerodynamic diameter <1 μm (PM1) were obtained from a Euro IV diesel bus in Beijing under two typical load mass conditions. PM1 mass and number emissions were recorded second by second using an electrical low-pressure impactor (ELPI). An on-road driving mode binning method was applied to relate instantaneous emission rate with real-time on-road driving conditions, and an engine-operating mode binning method was used to explore the impacts of engine load on PM1 emission characteristics. Our results show that higher load mass will increase both particle mass and number emissions. Measured PM1 mass emission factors were 0.147 and 0.185 g/ km under low and high load mass conditions, respectively. PM1 number emission factors were 3.71 × 1013 and 4.58 × 1013 #/km. In addition, load mass also influenced the size-resolved concentration of PM mass and number from that sampled bus. For example, under low load mass conditions, an obvious peak of PM number concentration was observed situated in the second channel of the ELPI corresponding to the median diameter 63 nm. By contrast, peak concentration of the PM number was increased under high load mass conditions and situated in the third channel of the ELPI corresponding to the median diameter 109 nm.

Keywords
PM1; Particle number; Diesel bus; Size distribution; Engine load

 
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