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밀폐공간에서 비말 가림막 높이에 따른 감염성 비말 공기전파 차단능력 평가
허지은,조희주,박현설,신동호,심준목,조윤행,Heo, Jieun,Cho, Hee-joo,Park, Hyun-Seol,Shin, Dongho,Shim, Joonmok,Joe, Yun-Haeng 한국입자에어로졸학회 2021 Particle and Aerosol Research Vol.17 No.2
Although the installation of droplet protection screen (DPS) is known to prevent droplet transmission, there is still a lack of knowledge in effectiveness of DPS installation to block the airborne transmission. In this study, the prevention ability of DPS against airborne transmission was evaluated according to the DPS height. When the DPS was not installed, the maximum concentration of PM1.0 at the location opposite to infected person was 35% of that at the infected person location. When the DPS was installed, the DPS effectively prevented the airborne transmission, consequently approximately 7% of generated particles were measured at the opposite location from particle generation position (infected person location). The prevention ability of DPS increased with DPS height, the maximum prevention efficiency of 95.1% was obtained when the DPS height was 900mm. Moreover, the speed of airborne transmission was delayed by installation of DPS, and the delay time increased with DPS height.
조윤행,신동호,박현설,허지은,심준목,Joe, Yun-Haeng,Shin, Dongho,Park, Hyun-Seol,Heo, Jieun,Shim, Joonmok 한국입자에어로졸학회 2021 Particle and Aerosol Research Vol.17 No.2
In this study, the clean air delivery rate (CADR) of ceiling air circulator (CAA) was determined under indoor environmental simulation conditions. An air filter was used to provide air cleaning ability to the CAA. The CADR of filter adapted CAA was evaluated and compared with the value of commercial air purifier. The installation of mesh-shaped filter on the CAA showed particle reduction effect on the particles over 0.4 ㎛ in diameter, but the CADR was up to 0.25 m<sup>3</sup>/min. When the filter having 99.9% in collection efficiency was installed on the CAA, its CADR was 1.52 m<sup>3</sup>/min, while the CADR of commercial air purifier was 3.19 m<sup>3</sup>/min.