Particle and Aerosol Research
Vol. 15, No. 1, March 2019, Pages 15-25
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ISSN : 1738-8716 (Print)
ISSN : 2287-8130 (Online)
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Filtration Efficiency of Electrically Charged Air Filters by a
Corona Method
Zainul Alim Ali Murtadlo1)2),Yun-Haeng Joe1),Seok-Hoon Park3),Hyun-Seol Park1),2) *
1)Climate Change Research Division, Korea Institute of Energy Research
2)Department of Advanced Energy and System Engineering, University of Science and Technology
3)SG Safety Corporation, 28 Sinpyeong-ro, Pyeongtaek-si, Gyeonggi-do 305-764, Korea
*Corresponding author.
Tel.: +82-42-860-3052, E-mail: phs@kier.re.kr
Received 25 March 2019, Revised 26 March 2019, Accepted 26 March 2019, Available online 31 March 2019
http://dx.doi.org/10.11629/jpaar.2019.15.1.015
Abstracts
The influences of corona charging parameters on collection efficiency and surface potential of air filters were investigated. A polypropylene filter medium was electrically charged using a corona charger, and the resulting surface potential and filtration efficiency against neutralized KCl particles were measured. The filter media was charged under different conditions of applied voltage, voltage polarity, charging time, and distance between electrodes. In addition, we considered charging both sides of the filter as well as charging one side of the filter. As a result, electrical force obtained by charged fiber affected filtration efficiency when the apply voltage strength was higher than 7 kV. Negatively charged filter had higher filtration efficiency than positively charged filter while the surface potential of the negatively charged filter was slightly lower than those of positively charged filter. Moreover, the filtration efficiency increased as the charging time of filter fiber increased and the distance between electrodes decreased. The filtration efficiency was more sensitive to changes of charging time than to those of electrode distance, and the efficiency of both sides charged filter was higher than that of single side charged filter.
Keywords
Air filter, Corona charging, Applied voltage, Charging time, Filtration efficiency
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