Journal of Korean Society for Atmospheric Environment (한국대기환경학회지)

Korean Society for Atmospheric Environment (한국대기환경학회)
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Filtration Performance of Fibrous Air Filter under External Electric Field using Insulated Electrodes

외부전기장 적용 섬유상 에어필터의 절연 전극 사용에 따른 여과특성

  • Ji, Sung-Mi (Department of Environmental Health, Korea University) ;
  • Sohn, Jong-Ryeul (Department of Environmental Health, Korea University) ;
  • Park, Hyun-Seol (Climate Change Research Division, Korea Institute of Energy Research)
  • 지성미 (고려대학교 환경보건학과) ;
  • 손종렬 (고려대학교 환경보건학과) ;
  • 박현설 (한국에너지기술연구원 기후변화연구본부)
  • Received : 2012.11.02
  • Accepted : 2012.11.15
  • Published : 2012.12.31
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Abstract

Applying an external electric field across air filter media is one of methods to improve the filtration performance. Metal wire meshes have been commonly used as electrodes situated on both sides of a thick filter pad. For a thin filter medium a short circuit, known as the biggest drawback for applying an external electric field to air filter, can occur at the closest point between electrodes. In this study several types of insulated meshes were prepared by coating #50 meshes with a dielectric material, Nylon 66, and the filtration property of air filter was evaluated at the presence of external electric field using those insulated meshes as electrodes and compared with that of filters using bared meshes. The collection efficiency of tested filter was increased from 78% to 95% for singly charged 100 nm particles by application of external electric field. As a result, there was no significant difference in collection efficiency between filters with insulated and bared electrodes. Similar results could be also seen from the tests using polydisperse particles. Finally, through this study, we found that the insulation of mesh electrodes doesn't affect the filtration performance of fibrous air filter under external electric field.

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References

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