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

The Korean Society of Mechanical Engineers (대한기계학회)
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Design and Performance Evaluation of a Portable 3-Stage Electrical Low Pressure Impactor(P-ELI) for Measurements of Submicron Aerosol

미세입자 측정용 간이형 3단 전기적 저압 임펙터의 설계 및 성능평가

  • 조명훈 (연세대학교 기계공학과 대학원) ;
  • 지준호 (한국과학기술연구원 대기자원연구센) ;
  • 박동호 (연세대학교 기계공학과 대학) ;
  • 배귀남 (한국과학기술연구원 대기자원연구센) ;
  • 황정호 (연세대학교 기계공학과)
  • Published : 2004.07.01
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Abstract

Cascade impactors are widely used to collect size classified aerosol. A major disadvantage of this instrument is the required long sampling time. Electrical low pressure impactor has been developed to overcome this disadvantage and to achieve real-time measurements on the particle size distribution. The instrument consists primarily of a corona charger, low pressure cascade impactor and multi channel electrometer. We designed and evaluated the performance of a potable 3-stage low pressure impactor using an electrical method. For the calibration of the impactor, monodispersed particles were generated using evaporation-condensation method followed by electrostatic classification using a DMA(Differential Mobility Analyzer). The collection efficiency curves of the stages can be determined by analysing the fraction of particles collected by each stage.

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References

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