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Optimized mechanism for fast removal of infectious pathogen-laden aerosols in the negative-pressure unit.
Park, Jooyeon; Lee, Kwang Suk; Park, Hyungmin.
  • Park J; Department of Mechanical Engineering, Seoul National University, Seoul 08826, South Korea.
  • Lee KS; Department of Urology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul 06273, South Korea.
  • Park H; Department of Mechanical Engineering, Seoul National University, Seoul 08826, South Korea; Institute of Advanced Machines and Design, Seoul National University, Seoul 08826, South Korea. Electronic address: hminpark@snu.ac.kr.
J Hazard Mater ; 435: 128978, 2022 08 05.
Article in English | MEDLINE | ID: covidwho-1796502
ABSTRACT
It has been frequently emphasized that highly contagious respiratory disease pathogens (such as SARS-CoV-2) are transmitted to the other hosts in the form of micro-sized aerosols (< 5 µm) in the air without physical contacts. Hospital environments such as negative-pressure unit are considered being consistently exposed to pathogens, so it is essential to quickly discharge them through the effective ventilation system. To achieve that, in the present study, we propose the optimized ventilation mechanism and design for the fastest removal of pathogen-laden aerosol using numerical simulations. We quantitatively evaluated the aerosol removal performance of various ventilation configurations (combinations of air exhaust and supply ducts), and found that the key mechanism is to form the coherent (preferentially upward) airflow structure to surround the respiratory flow containing the aerosol cluster. We believe that the present findings will play a critical role in developing the high-efficiency negative-pressure facility irrespective of its size and environments.
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Full text: Available Collection: International databases Database: MEDLINE Main subject: Air Filters / COVID-19 Type of study: Experimental Studies Limits: Humans Language: English Journal: J Hazard Mater Journal subject: Environmental Health Year: 2022 Document Type: Article Affiliation country: J.jhazmat.2022.128978

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Full text: Available Collection: International databases Database: MEDLINE Main subject: Air Filters / COVID-19 Type of study: Experimental Studies Limits: Humans Language: English Journal: J Hazard Mater Journal subject: Environmental Health Year: 2022 Document Type: Article Affiliation country: J.jhazmat.2022.128978