Ejector diluter behavior assessment and dilution factor accuracy improvement

0574068 - ÚCHP 2025 RIV GB eng J - Journal Article
Červený, O. - Vybíral, P. - Mareš, L. - Hemerka, J. - Ondráček, Jakub - Roztočil, Petr
Ejector diluter behavior assessment and dilution factor accuracy improvement.
Particulate Science and Technology. Roč. 42, č. 2 (2024), s. 263-268. ISSN 0272-6351. E-ISSN 1548-0046
Institutional support: RVO:67985858
Keywords : ejector diluter * dilution factor * aerosol measurement * particle size distribution
OECD category: Environmental sciences (social aspects to be 5.7)
Impact factor: 2.5, year: 2022
Method of publishing: Limited access

In some applications, accurate knowledge of the dilution factor of a diluter can be crucial. Although the sample gas composition is one of the factors that influences the dilution factor of an ejector diluter, the available calibration data are usually obtained using air as sample gas. That can be a problem when the diluter is used in exhaust gas conditions, where the gas composition can differ significantly from air. Available ejector diluter models have been found unsuitable. The goal of this study was to set a method to determine the shift of dilution factor caused by sample gas composition, so the nominal or calibration value can be adjusted. Using CO2, the method was experimentally verified with good results. In addition, the present paper also investigated the possible influence of the diluter on the particle size distribution curve of the diluted sample.
Permanent Link: https://hdl.handle.net/11104/0344435