한국입자에어로졸학회지 (Particle and aerosol research)

  • 제20권2호
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  • Pages.25-33
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  • 2024
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  • 1738-8716(pISSN)
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  • 2287-8130(eISSN)
한국입자에어로졸학회 (Korean Association for Particle and Aerosol Research)
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상대습도에 따른 비산 미세먼지의 크기 분포 및 특성 분석

Study on size distribution and characteristics of particulate matter suspension in indoor space depending on relative humidity

  • 김민정 (한국철도기술연구원 신교통혁신연구소) ;
  • 박지원 (한국철도기술연구원 철도시험인증센터)
  • Minjeong Kim (New Transportation Innovative Research Center, Korea Railroad Research Institute) ;
  • Jiwon Park (Railroad Test and Certification Division, Korea Railroad Research Institute)
  • 투고 : 2024.03.03
  • 심사 : 2024.03.23
  • 발행 : 2024.06.30
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초록

Suspension of particulate matter (PM) in indoor spaces, which increases risk of negative impact on occupants' health from exposure to PM, is influenced by humidity level in the indoor environment. The goal of this study is to investigate the property of size-resolved PM suspension in accordance with the relative humidity through simulation chamber experiments which reflect the indoor environmental characteristics. The relative humidity of simulation chamber is adjusted to 35%, 55% and 75% by placing it inside a real-size environmental chamber which allows artificial control of climatic conditions (e.g., temperature, humidity). At the respective humidity conditions, PM suspension concentration caused by occupant walking is analyzed by particle size (0.5-0.8, 0.8-1.0, 1.0-2.5, 2.5-3.5, 3.5-4.5, 4.5-5.5, 5.5-8.0, and 8.0-10 ㎛). Irrespective of the particle size, the suspension concentration reveals a decreasing tendency as the relative humidity increases. Furthermore, a one-way analysis of variance (one-way ANOVA) test statistically verifies that the suspension concentration has a significant difference depending on the indoor relative humidity level. In addition, as the relative humidity increases, a proportion of the suspended particles with 0.5-2.5 ㎛ diameter decreases, while that with 2.5-3.5 ㎛ diameter increases. The reason is considered that the humidity has an effect on adhesion and coagulation forces of the particles.

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과제정보

이 연구는 정부(과학기술정보통신부, 교육부)의 재원으로 한국연구재단의 지원을 받아 수행되었습니다. (No, 2019M3E7A1113078).

참고문헌

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