지하역사 승강장 공조 시스템 필터용 항바이러스 코팅 성능 및 재생 성능 평가 Development of Optimal Antiviral Coating Method for the Air Filtration System of subway station Abstract In this study, a novel antiviral coating method for the air filtration system of subway station was investigated. Using
dry aerosol coating process, we developed a high-performance antiviral air filter with spark discharger and carbon
brush type ionizer. Silver nanoparticles were produced by a spark discharge generation system with ion injection
system and were used as antiviral agents coated onto a medium grade air filter. The pressure drop, filtration
efficiency, and antiviral ability of the filter against aerosolized MS2 virus particles as a surrogate of SARS-CoV-2
virus were tested with dust contamination. Dust contamination caused the increase of the filtration efficiency and
pressure drop, while the antiviral agents (in this study, silver nanoparticles) coating did not have any significant effect
on the filtration efficiency and pressure drop. Using these properties, we suggested a novel method to maximize the
antiviral performance of the antiviral air filter that was contaminated by dust particles. Moreover theoretical analysis
of antiviral ability with dust contamination and re-coated antiviral agents was carried out using a mathematical model
to calculate the time-dependent antiviral effect of the filter under actual conditions of subway station. Our model can
be used to apply on antiviral air filtration system of subway station for prevention of pandemic diffusion, and predict
the life cycle of an antiviral filter. Key words Antiviral air filter, Bioaerosols, Air filtration sytstem, Indoor air quality, Subway station ▶출처 : 한국입자에어로졸학회 Vol. 18, No. 1 |
