AAAR 37th Annual Conference October 14 - October 18, 2019 Oregon Convention Center Portland, Oregon, USA
Abstract View
Methodology to Estimate Performance of Onepass-type Air Sterilization System Using UVC LED in a Chamber for Inactivating Aerosolized Virus
SUNGJAE PARK, Dae Hoon Park, Jungho Hwang, Yonsei University, Korea
Abstract Number: 404 Working Group: Bioaerosols
Abstract This study is aimed to evaluate the performance of onepass-type air sterilization system with virus contaminated air in a sealed chamber by using UVC LED and propose a model to estimate real sterilization performance. A model for predicting the chamber sterilization performance was derived from calculation method of filter-based air cleaner performance. Using the data of sterilization performances obtained from the chamber experiment, the correlation work was applied on the above model. According to the experiment, the chamber sterilization performance was 1.81 times higher than expected by onepass-type system’s specification. If the germicidal effect only occurs inside the onepass-type system, the chamber sterilization performance should be less than 1x the spec of the onepass-type system due to the flow in the chamber. Therefore, the above result means that viruses passing through the onepass-type system were being further sterilized as they circulate through the chamber from outside the onepass-type system. This considered to be because the virus was physically damaged even if the virus was not completely inactivated in the onepass-type system. The viruses damaged by the UVC were inactivated itself faster than when they were intact in the air. These results can be utilized as an important data for setting the target sterilization performance in UVC sterilization equipment design such as air sterilizer.