事業所のエアロゾル感染予防に向けた調査手法の提案と実証

Ishigaki, Yo; KATO, Tatsuo

doi:10.2486/josh.josh-2022-0024-cho

Roudou Anzen Eisei Kenkyuu

2023

DOI: 10.2486/josh.josh-2022-0024-cho

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事業所のエアロゾル感染予防に向けた調査手法の提案と実証

Yo Ishigaki

Tatsuo KATO²

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2023

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Cited by 1 publication

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Estimation of air change rate by CO<sub>2</sub> sensor network in workplace with COVID-19 outbreak

Yokogawa,

Ishigaki,

Kitamura

et al. 2023

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Objectives: This study aimed to measure the air change per hour (ACH) in a workplace that spanned 880 m 2 and had a ceiling height of 3 m. This workplace experienced clusters of coronavirus disease (COVID-19) cases, and the study measured ACH before and after remediation. The objective was to provide a quantitative estimate of ACH in various compartments. Methods: A network of CO 2 sensors was set up in the workplace. The data from the sensors were analyzed using a generalized linear mixed model and dynamic time distortion to estimate the ACH in each area. Results: During the cluster outbreak, the ACH was in the range of 0.408 to 1.178/hour (p < .001), which was relatively low and likely contributed to the outbreak. Additionally, the room's ventilation was imbalanced due to partitioning. However, the ACH improved significantly from 1.835 to 2.551/hour (p < .001) by simply opening the windows and allowing natural ventilation. Conclusions: Based on the evidence that the transmission of COVID-19 was contained following the enhancement of ventilation, an ACH rate of below 2/hour was the primary factor in developing COVID-19 clusters within the facility under investigation.

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Estimation of air change rate by CO<sub>2</sub> sensor network in workplace with COVID-19 outbreak

Yokogawa,

Ishigaki,

Kitamura

et al. 2023

EOH-P

Self Cite

View full text Add to dashboard Cite

show abstract

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事業所のエアロゾル感染予防に向けた調査手法の提案と実証

Cited by 1 publication

References 10 publications

Estimation of air change rate by CO<sub>2</sub> sensor network in workplace with COVID-19 outbreak

Estimation of air change rate by CO<sub>2</sub> sensor network in workplace with COVID-19 outbreak

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