Measuring Combustion Aerosol Size Distribution from Diesel Engines with an Electrical Mobility Spectrometer

Abstract

An electrical mobility spectrometer (EMS) was developed for measuring aerosol size distribution inthe size range of 10 nm to 1,000 nm with the time response of 45 second. This is achieved via anelectrostatic classification technique, consisting of a corona charger followed by multi-channel electrometersensor and constant voltage classifier. In this research paper, the combustion aerosol size distributionmeasurement from diesel engine with an electrical mobility spectrometer developed at Chiang Mai Universitywas performed. Aerosol size distribution measuring from the spectrometer was compared with thatobtained from an electrical low-pressure impactor (ELPI) and good agreement was found from comparison.

Keywords : Aerosol / Particle / Electrical Mobility / Diesel Engine / Spectrometer