Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Measurements of ion concentration in gasoline and diesel engine exhaust
AbstractThe nanoparticles formed in motor vehicle exhaust have received increasing attention due to their potential adverse health effects. It has been recently proposed that combustion-generated ions may play a critical role in the formation of these volatile nanoparticles. In this paper, we design an experiment to measure the total ion concentration in motor vehicle engine exhaust, and report some preliminary measurements in the exhaust of a gasoline engine (K-car) and a diesel engine (diesel generator). Under the experimental set-up reported in this study and for the specific engines used, the total ion concentration is ca. 3.3×106cm−3 with almost all of the ions smaller than 3nm in the gasoline engine exhaust, and is above 2.7×108cm−3 with most of the ions larger than 3nm in the diesel engine exhaust. This difference in the measured ion properties is interpreted as a result of the different residence times of exhaust inside the tailpipe/connecting pipe and the different concentrations of soot particles in the exhaust. The measured ion concentrations appear to be within the ranges predicted by a theoretical model describing the evolution of ions inside a pipe.
Measurements of ion concentration in gasoline and diesel engine exhaust
AbstractThe nanoparticles formed in motor vehicle exhaust have received increasing attention due to their potential adverse health effects. It has been recently proposed that combustion-generated ions may play a critical role in the formation of these volatile nanoparticles. In this paper, we design an experiment to measure the total ion concentration in motor vehicle engine exhaust, and report some preliminary measurements in the exhaust of a gasoline engine (K-car) and a diesel engine (diesel generator). Under the experimental set-up reported in this study and for the specific engines used, the total ion concentration is ca. 3.3×106cm−3 with almost all of the ions smaller than 3nm in the gasoline engine exhaust, and is above 2.7×108cm−3 with most of the ions larger than 3nm in the diesel engine exhaust. This difference in the measured ion properties is interpreted as a result of the different residence times of exhaust inside the tailpipe/connecting pipe and the different concentrations of soot particles in the exhaust. The measured ion concentrations appear to be within the ranges predicted by a theoretical model describing the evolution of ions inside a pipe.
Measurements of ion concentration in gasoline and diesel engine exhaust
Yu, Fangqun (Autor:in) / Lanni, Thomas (Autor:in) / Frank, Brian P. (Autor:in)
Atmospheric Environment ; 38 ; 1417-1423
01.12.2003
7 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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