Aerosol penetration properties of an electret filter with submicron aerosols with various operating factors.
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.
Yang
Shinhao
S
Department of Leisure and Recreation Management, Toko University, Chia Yi County, Taiwan, ROC.
Lee
Whei-May G
WM
Huang
Hsiao-Lin
HL
Huang
Yi-Chin
YC
Luo
Chin-Hsiang
CH
Wu
Chih-Cheng
CC
Yu
Kuo-Pin
KP
D000336:Aerosols / Q000009:adverse effects / Q000737:chemistry*; D000393:Air Pollutants / Q000302:isolation & purification*; D000397:Air Pollution / Q000517:prevention & control*; D005374:Filtration / Q000295:instrumentation*; D055672:Static Electricity
D000336:Aerosols; D000393:Air Pollutants