Aerosol Penetration Properties of An Electret Filter with Submicron Aerosols with Various Operating Factors

doi:10.1080/10934520601015651

CNU IR > College of Sustainable Environment and Recreation > Dept. of Occupational Safety > Periodical Articles > Item 310902800/22248

Please use this identifier to cite or link to this item: https://ir.cnu.edu.tw/handle/310902800/22248

Title:	Aerosol Penetration Properties of An Electret Filter with Submicron Aerosols with Various Operating Factors
Authors:	Shinhao Yang Whei-May G. Lee Hsiao-Lin Huang Yi-Chin Huang Chin-Hsiang Luo Chih-Cheng Wu Kuo-Pin Yu
Contributors:	職業安全衛生系
Keywords:	Aerosol penetration Electret filter Aerosol charge state Surface charge
Date:	2007-01
Issue Date:	2010-01-15 11:25:02 (UTC+8)
Abstract:	This study was undertaken to determine the effects of using an electret filter on aerosol penetration. Various factors, including particle size (0.05 to 0.5 micro m), aerosol charge state (neutral and single charge), face velocity (0.1, 0.3, 0.5 and 1.0 m/s), and relative humidity (RH 30% and RH 70%), were examined to assess their effects on aerosol collection characteristics. The results presented here demonstrate that the electric fields of the electret and discharged filter were -1.53 x 104 and -1.3 x 102 (V/m). The penetration through the electret filter with singly charged aerosol and neutral aerosol ranged from 0.4% to 13% and 14% to 29%, respectively. According to these results, the coulombic capture force was dominant for the smaller aerosol and the dielectrophoretic capture mechanism was considered important for the larger aerosol. The level of penetration through the electret filter increased with increasing face velocity and relative humidity. The temperature did not affect the penetration through the electret. Furthermore, from the regression analysis conducted during the operating conditions of this work, the aerosol charge was shown to exert the greatest influence on aerosol penetration.
Relation:	Journal of Environmental Science and Health Part A 42(1)： p.51-57
Appears in Collections:	[Dept. of Occupational Safety] Periodical Articles

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