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Study on electrical charge distribution of aerosol using a Gerdien ion counter

Gerdien 이온측정기를 이용한 에어로졸의 하전 특성 분석에 관한 연구

  • Joe, Yun-Haeng (Climate Change Research Division, Korea Institute of Energy Research) ;
  • Shim, Joonmok (Climate Change Research Division, Korea Institute of Energy Research) ;
  • Shin, Il-Kyoung (Climate Change Research Division, Korea Institute of Energy Research) ;
  • Yook, Se-Jin (Department of Mechanical Engineering, Hanyang University) ;
  • Park, Hyun-Seol (Climate Change Research Division, Korea Institute of Energy Research)
  • 조윤행 (한국에너지기술연구원 기후변화연구본부) ;
  • 심준목 (한국에너지기술연구원 기후변화연구본부) ;
  • 신일경 (한국에너지기술연구원 기후변화연구본부) ;
  • 육세진 (한양대학교 기계공학과) ;
  • 박현설 (한국에너지기술연구원 기후변화연구본부)
  • Received : 2018.03.28
  • Accepted : 2018.03.30
  • Published : 2018.03.31

Abstract

Since the motion of the charged particle strongly depends on its charge characteristics, information on charge distributions of target particles is one of the important variables in aerosol research. In this study, charged distribution of atomized NaCl particles were measured using a Gerdien type ion counter. Two kinds of particle charging conditions were used in this study. First, atomized NaCl particles were passed through an aerosol neutralizer to have a Boltzmann charge distribution, and then its charge distribution was measured. In this case, the portion of uncharged particles was compared with the portion obtained from the Boltzmann charge distribution for verifying the suggested experimental method. Second, same experiment was conducted without the aerosol neutralizer to measure the charge distribution of atomized and un-neutralized NaCl particles. In the conclusion, the portion of uncharged, negatively charged and positively charged particles were 19%, 62% and 20%, respectively, for neutralized particles. The atomized particles, which was generated without the aerosol neutralizer, also had almost a zero charge state, but the standard deviation in charge distribution was larger than that of neutralized particles. The test method proposed in this study is expected to be used in various aerosol research fields because it can obtain simple information on the particle charge characteristics more easily and quickly than the existing test methods.

Acknowledgement

Supported by : 한국에너지기술연구원

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