Electrostatic evaluation of a unipolar diffusion and field charger of aerosol particles by a corona discharge

This article presents a unipolar diffusion and field charger by corona discharge is presented and electrostatically evaluated for charging aerosol particles. The electrostatic characteristics of the charger were investigated with an electrometer by measuring the ion number concentrations correspondi...

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Main Authors: Intra P., Yawootti A., Tippayawong N.
Format: Article
Language:English
Published: 2014
Online Access:http://www.scopus.com/inward/record.url?eid=2-s2.0-84885796919&partnerID=40&md5=c7556703178304e2212ba436b16be338
http://cmuir.cmu.ac.th/handle/6653943832/1643
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Institution: Chiang Mai University
Language: English
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spelling th-cmuir.6653943832-16432014-08-29T09:29:33Z Electrostatic evaluation of a unipolar diffusion and field charger of aerosol particles by a corona discharge Intra P. Yawootti A. Tippayawong N. This article presents a unipolar diffusion and field charger by corona discharge is presented and electrostatically evaluated for charging aerosol particles. The electrostatic characteristics of the charger were investigated with an electrometer by measuring the ion number concentrations corresponding to the discharge and charging currents. The discharge and charging currents, and ion number concentration in the discharge and charging zones of the charger, increased with corona voltage. The magnitudes of the ion number concentration for positive and negative coronas in the discharge zone ranged from 1.34 × 1013 to 1.84 × 1015 ions/m3 and 7.34 × 1013 to 2.64 × 1015 ions/m3, respectively. For the charging zone, the ion number concentrations for positive and negative coronas ranged from 2.95 × 1013 to 1.52 × 1014 ions/m3 and 2.06 × 1013 to 1.47 × 1014 ions/m3, respectively. To predict the behavior of the electric field strength and lines in the discharge and charging zones of the charger, the electric field strength and distribution of the charger in the discharge and charging zones were calculated by a commercial computational fluid dynamics software package. Numerical calculation results of electric field distribution and lines through the inner electrode showed good agreement with experimental results. Also, the mean charge per particle for particle diameters were in the range of 0.01 to 50 m for various operating conditions of the charger was theoretically evaluated. For both diffusion and field charging, lower aerosol flow rate and higher corona voltage resulted in an increase in the mean charge per particle within the charger. This simple charger proved to be particularly useful in diffusion and field charging of aerosol particles in particulate matter detector instruments for measuring PM10 and PM2.5 concentration. © 2013 Copyright Taylor and Francis Group, LLC. © 2013 Taylor & Francis Group, LLC. 2014-08-29T09:29:33Z 2014-08-29T09:29:33Z 2013 Article 02726351 10.1080/02726351.2013.829544 PTCHD http://www.scopus.com/inward/record.url?eid=2-s2.0-84885796919&partnerID=40&md5=c7556703178304e2212ba436b16be338 http://cmuir.cmu.ac.th/handle/6653943832/1643 English
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
language English
description This article presents a unipolar diffusion and field charger by corona discharge is presented and electrostatically evaluated for charging aerosol particles. The electrostatic characteristics of the charger were investigated with an electrometer by measuring the ion number concentrations corresponding to the discharge and charging currents. The discharge and charging currents, and ion number concentration in the discharge and charging zones of the charger, increased with corona voltage. The magnitudes of the ion number concentration for positive and negative coronas in the discharge zone ranged from 1.34 × 1013 to 1.84 × 1015 ions/m3 and 7.34 × 1013 to 2.64 × 1015 ions/m3, respectively. For the charging zone, the ion number concentrations for positive and negative coronas ranged from 2.95 × 1013 to 1.52 × 1014 ions/m3 and 2.06 × 1013 to 1.47 × 1014 ions/m3, respectively. To predict the behavior of the electric field strength and lines in the discharge and charging zones of the charger, the electric field strength and distribution of the charger in the discharge and charging zones were calculated by a commercial computational fluid dynamics software package. Numerical calculation results of electric field distribution and lines through the inner electrode showed good agreement with experimental results. Also, the mean charge per particle for particle diameters were in the range of 0.01 to 50 m for various operating conditions of the charger was theoretically evaluated. For both diffusion and field charging, lower aerosol flow rate and higher corona voltage resulted in an increase in the mean charge per particle within the charger. This simple charger proved to be particularly useful in diffusion and field charging of aerosol particles in particulate matter detector instruments for measuring PM10 and PM2.5 concentration. © 2013 Copyright Taylor and Francis Group, LLC. © 2013 Taylor & Francis Group, LLC.
format Article
author Intra P.
Yawootti A.
Tippayawong N.
spellingShingle Intra P.
Yawootti A.
Tippayawong N.
Electrostatic evaluation of a unipolar diffusion and field charger of aerosol particles by a corona discharge
author_facet Intra P.
Yawootti A.
Tippayawong N.
author_sort Intra P.
title Electrostatic evaluation of a unipolar diffusion and field charger of aerosol particles by a corona discharge
title_short Electrostatic evaluation of a unipolar diffusion and field charger of aerosol particles by a corona discharge
title_full Electrostatic evaluation of a unipolar diffusion and field charger of aerosol particles by a corona discharge
title_fullStr Electrostatic evaluation of a unipolar diffusion and field charger of aerosol particles by a corona discharge
title_full_unstemmed Electrostatic evaluation of a unipolar diffusion and field charger of aerosol particles by a corona discharge
title_sort electrostatic evaluation of a unipolar diffusion and field charger of aerosol particles by a corona discharge
publishDate 2014
url http://www.scopus.com/inward/record.url?eid=2-s2.0-84885796919&partnerID=40&md5=c7556703178304e2212ba436b16be338
http://cmuir.cmu.ac.th/handle/6653943832/1643
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