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Assessing airborne infection risk through a model of airflow evacuation and recirculation dynamics.
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building Engineering, Energy Systems and Sustainability Science, Energy Systems and Building Technology. (Energy Systems)ORCID iD: 0000-0002-2171-3013
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building Engineering, Energy Systems and Sustainability Science, Energy Systems and Building Technology. (Energy Systems)ORCID iD: 0000-0002-7926-7378
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building Engineering, Energy Systems and Sustainability Science.
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Management, Industrial Design and Mechanical Engineering.
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2024 (English)Conference paper, Published paper (Refereed)
Abstract [en]

In a ventilated room, the indoor airflows are complicated but can generally be defined by an internal recirculating airflow generated by flooding of ventilation air. This concept categorizes the internal room flow (air and contaminants) as consist of two populations: One leaving the room and the other recirculating. The one recirculating is spreading the contaminants while the one leaving is evacuating the contaminants, which are quantified by the transfer probability between the source and other locations in the room and by purging flow rate, respectively. This concept accounts for spatial and temporal aspects in risk of airborne infection transmission. The current paper proposes and discusses a revised risk infection model based on this concept and has demonstrated applicability of the model with a test measurement setup with both mixing and displacement ventilation systems. The results emphasize the importance of considering both spatial and temporal factors in assessing airborne infection risks. It underscores the need for dynamic models like the proposed revised Wells-Riley model to provide a more accurate representation of infection risks in various indoor environments. Additionally, it discusses the necessity for longer measurement periods to fully understand the evolving nature of these risks. 

Place, publisher, year, edition, pages
2024.
Keywords [en]
Infectious respiratory disease, Airborne infection risk, Air recirculation, purging flowrate, Contaminant flooding
National Category
Building Technologies Mechanical Engineering
Research subject
Sustainable Urban Development
Identifiers
URN: urn:nbn:se:hig:diva-44122OAI: oai:DiVA.org:hig-44122DiVA, id: diva2:1854807
Conference
RoomVent Conference, April 22-25, Stockholm, Sweden
Part of project
Ventilation as a strategy to reduce indoor transmission of airborne diseases: development of new strategies and a risk assessment model, Swedish Research Council FormasAvailable from: 2024-04-26 Created: 2024-04-26 Last updated: 2024-04-29Bibliographically approved

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Type fulltextMimetype application/pdf

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Kabanshi, AlanAndersson, HaraldSandberg, Mats

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Kabanshi, AlanAndersson, HaraldSundberg, MikaelSenkic, DarioSandberg, Mats
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Energy Systems and Building TechnologyDepartment of Building Engineering, Energy Systems and Sustainability ScienceDepartment of Industrial Management, Industrial Design and Mechanical Engineering
Building TechnologiesMechanical Engineering

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CiteExportLink to record
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Citation style
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