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

  • 제28권3호
  • /
  • Pages.315-323
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  • 2004
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  • 1226-4881(pISSN)
  • /
  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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패러데이 케이지와 에어로졸 하전기의 설계 및 성능평가

Design and Performance Evaluation of a Faraday Cage and an Aerosol Charger

  • 지준호 (삼성전자 DA 연구소 요소기술그룹) ;
  • 배귀남 (한국과학기술연구원 대기자원연구센터) ;
  • 황정호 (연세대학교 기계공학과)
  • 발행 : 2004.03.01
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초록

An electrical cascade impactor is a multi-stage impaction device to separate airborne particles into aerodynamic size classes using particle charging and electrical detection techniques. A Faraday cage and an aerosol charger, which are basic components of the electrical cascade impactor, were designed and evaluated in this study. The low-level current response of the Faraday cage was investigated with changing particle size and air flow rate by using sodium chloride (NaCl) particles. The response of the prototype Faraday cage was very similar to that of a commercial aerosol electrometer (TSI model 3068) within ${\pm}$5% for singly-charged particles. The response linearity of the prototype Faraday cage could be extended up to flow rate of 30 L/min. For the performance evaluation of the aerosol charger the monodisperse liquid dioctyl sebacate (DOS) particles, with diameters of 0.1∼0.8$\mu\textrm{m}$, were generated using spraying from an atomizer followed by evaporation-condensation process. Typical performance parameters of the aerosol charger such as P$.$n, wall loss, and elementary charges per particle were evaluated. The performance of the prototype aerosol charger was found to be close to that of the aerosol charger used in an electrical low pressure impactor (ELPI, Dekati).

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참고문헌

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