An Experimental Investigation of A Non-Mixing Type Corona-Needle Charger for Submicron Aerosol Particles

  • Panich Intra
  • Artit Yawootti
Original Article



In this study, the non-mixing type corona-needle charger for submicron aerosol particles was designed and experimentally investigated.


The current-to-voltage characteristics, charger response and particle losses of the charger were experimentally studied and discussed at different corona voltage of about 0–5 kV and particle diameter of about 10–1000 nm and aerosol flow rate of about 1.5 L/min.


It was shown that the highest ion number concentration in the discharge zone of the charger was found to be about 3.48 × 1014 ions/m3 for a corona voltage of about 5 kV. The charger response was found to increase when the particle diameter decreased for particle smaller than 80 nm. For particle larger than 80 nm, the charger response was found to slightly increase with the particle diameter. The highest diffusion loss was seen to occur at particle diameter of 10 nm to be about 49.74 %. For the electrostatic loss, the highest particle loss was observed to occur at particles diameter of about 10 nm to be about 52.87 % for the corona voltages of 3.2 kV.


From the findings, this non-mixing type charger proved to be particularly useful as an aerosol charger before the detector in an electrical aerosol detector.


Corona discharge Particle charging Aerosol charger Particle loss 



The authors gratefully acknowledge the Electricity Generating Authority of Thailand (EGAT), Research contract no. GGR010100089000. The authors wish to thank the Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University for the Electrostatic Classifiers 3080 and the Ultrafine Condensation Particle Counter 3776 and also Prof. Dr. Rainer Zawadzki of Governor State University for the valuable contribution during the preparation of the manuscript.


  1. 1.
    Flagan RC (1998) History of electrical aerosol measurements. Aerosol Sci Technol 28:301–380CrossRefGoogle Scholar
  2. 2.
    Intra P, Tippayawong N (2007) An overview of aerosol particle sensors for size distribution measurement. Maejo Int J Sci Technol 1:120–136Google Scholar
  3. 3.
    Intra P, Tippayawong N (2009) Progress in unipolar corona discharger designs for airborne particle charging: a literature review. J Electrost 67(4):605–615CrossRefGoogle Scholar
  4. 4.
    Whitby KT (1961) Generator for producing high concentration of small ions. Rev Sci Instrum 32(12):1351–1355CrossRefGoogle Scholar
  5. 5.
    Medved A, Dorman F, Kaufman SL, Pocher A (2000) A new corona-based charger for aerosol particles. J Aerosol Sci 31:s616–s617CrossRefGoogle Scholar
  6. 6.
    Marquard A, Kasper M, Meyer J, Kasper G (2005) Nanoparticle charging efficiencies and related charging conditions in a wire-tube ESP at DC energization. J Electrost 63:693–698CrossRefGoogle Scholar
  7. 7.
    Hernandez-Sierra A, Alguacil FJ, Alonso M (2003) Unipolar charging of nanometer aerosol particle in a corona ionizer. J Aerosol Sci 34:733–745CrossRefGoogle Scholar
  8. 8.
    Alonso M, Martin MI, Alguacil FJ (2006) The measurement of charging efficiencies and losses of aerosol nanoparticles in a corona charger. J Electrost 64:203–214CrossRefGoogle Scholar
  9. 9.
    Intra P, Tippayawong N (2006) Corona ionizer for unipolar diffusion charging of nanometer aerosol particles, 29th Electrical Engineering Conference, Pattaya, Thailand, 9–10 NovemberGoogle Scholar
  10. 10.
    Intra P, Tippayawong N (2006) Comparative study on electrical discharge and operation characteristics of needle and wire-cylinder corona chargers. J Electr Eng Technol 1(4):520–527CrossRefGoogle Scholar
  11. 11.
    Park D, An M, Hwang J (2007) Development and performance test of a unipolar diffusion charger for real-time measurements of submicron aerosol particles having a log-normal size distribution. J Aerosol Sci 38(4):420–430CrossRefGoogle Scholar
  12. 12.
    Wei J (2007) Development of a method for measuring surface area concentration of ultrafine particles, D. Eng. Thesis, University of Duisburg-Essen, GermanyGoogle Scholar
  13. 13.
    Intra P, Yawootti A, Tippayawong N (2013) An electrostatic sensor for continuous monitoring of particulate air pollution. Korean J Chem Eng 30(12):2205–2212CrossRefGoogle Scholar
  14. 14.
    Murtomaa M, Pekkala P, Kalliohaka T, Paasi J (2005) A device for aerosol charge measurement and sampling. J Electrost 63(6–10):571–575CrossRefGoogle Scholar
  15. 15.
    Li L, Chen DR, Tsai PJ (2009) Use of an electrical aerosol detector (EAD) for nanoparticle size distribution measurement. J Nanopart Res 11(1):111–120CrossRefGoogle Scholar
  16. 16.
    Rostedt A, Marjamaki M, Yli-Ojanpera J, Keskinen J, Janka K, Nienela V, Ukkonen A (2009) Non-Collecting Electrical Sensor for Particle Concentration Measurement. Aerosol Air Qual Res 9:470–477CrossRefGoogle Scholar
  17. 17.
    Lanki T, Tikkanen J, Janka K, Taimisto P, Lehtimaki M (2011) An electrical sensor for long-term monitoring of ultrafine particles in workplaces. J Phys Conf Ser 304:012013CrossRefGoogle Scholar
  18. 18.
    TSI Incorporated (2002) Instruction manual for electrical aerosol detector model 3070A. TSI Incorporated, Saint PaulGoogle Scholar
  19. 19.
    Intra P, Tippayawong N (2013) Development and evaluation of a high concentration, high penetration unipolar corona ionizer for electrostatic discharge and aerosol charging. J Electr Eng Technol 8(5):1175–1181CrossRefGoogle Scholar
  20. 20.
    Chang J, Kelly AJ, Crowley JM (1995) Handbook of Electrostatic Processes. Marcel Dekker Inc, New YorkCrossRefGoogle Scholar
  21. 21.
    Hinds WC (1999) Aerosol technology. Wiley, New YorkGoogle Scholar
  22. 22.
    Ouf FX, Sillon P (2009) Charging efficiency of the Electrical Low Pressure Impactor’s corona charger: influence of the fractal morphology of nanoparticle aggregates and uncertainty analysis of experimental results. Aerosol Sci Technol 43(7):685–698CrossRefGoogle Scholar
  23. 23.
    Alonso M, Martin MI, Alguacil FJ (2006) The measurement of charging efficiencies and losses of aerosol nanoparticles in a corona charger. J Electrost 64(3–4):203–214CrossRefGoogle Scholar

Copyright information

© The Korean Institute of Electrical Engineers 2019

Authors and Affiliations

  1. 1.Research Unit of Applied Electric Field in Engineering (RUEE), College of Integrated Science and TechnologyRajamangala University of Technology LannaChiang MaiThailand

Personalised recommendations