Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Collection Performance of an Electret Cabin Air Filter for Fine Particles

승용차용 정전 필터의 미세 입자 포집 특성

  • Ji, Jun-Ho (Dept.of Mechanical Engineering, Graduate School of Yonsei University) ;
  • Gang, Seok-Hun (Dept.of Mechanical Engineering, Graduate School of Yonsei University) ;
  • Kim, Dong-Cheol (Dept.of Mechanical Engineering, Graduate School of Yonsei University) ;
  • Hwang, Jeong-Ho (Dept.of Mechanical Engineering, Graduate School of Yonsei University) ;
  • Yun, Ung-Seop (Dept.of Mechanical Engineering, Graduate School of Yonsei University) ;
  • Bae, Gwi-Nam
  • 지준호 (연세대학교 대학원 기계공학과) ;
  • 강석훈 (연세대학교 대학원 기계공학과) ;
  • 김동철 (연세대학교 대학원 기계공학과) ;
  • 황정호 (연세대학교 대학원 기계공학과) ;
  • 윤웅섭 (연세대학교 대학원 기계공학과) ;
  • 배귀남
  • Published : 2001.11.01
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Abstract

An electret filter is composed of permanently charged electret fibers and is widely used in applications requiring high collection efficiency and low-pressure drop. In this work, the fractional collection efficiency of the filter media used in manufacturing cabin air filters was investigated by using highly monodisperse particles ranging from 0.02 to 0.6 $\mu\textrm{m}$ in diameter at three different charging states: singly charged, uncharged, and equilibrium charged. The face velocity was varied from 2.4 to 20.4 crus. It was fecund that the fractional efficiency curve fur singly charged particles shows a typical trend that the collection efficiency is minimum at about 0.3 $\mu\textrm{m}$ in diameter. The fractional efficiency of equilibrium charged particles were not severely varied with the particle diameter. The collection efficiency curve fur uncharged particles has a minimum near 0.1 $\mu\textrm{m}$ in diameter. Another experiment was conducted for a cartridge filter to examine the effect of charge depletion on the collection efficiency in a cabin air filter. The result shows that the charge depletion of the cartridge filter can significantly lower the collection efficiency.

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References

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