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Numerical study on the dispersion of airborne contaminants from an isolation room in the case of door opening

A negative pressure isolation room is built to accommodate and cure patients with highly infectious diseases. An absolutely airtight space effectively prevents infectious diseases from leaking out of the isolation room. Opening the door leads to a breakdown in isolation conditions and causes the dis...

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Detalles Bibliográficos
Autores principales: Tung, Yun-Chun, Shih, Yang-Cheng, Hu, Shih-Cheng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier Ltd. 2009
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7108432/
https://www.ncbi.nlm.nih.gov/pubmed/32288590
http://dx.doi.org/10.1016/j.applthermaleng.2008.07.009
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author Tung, Yun-Chun
Shih, Yang-Cheng
Hu, Shih-Cheng
author_facet Tung, Yun-Chun
Shih, Yang-Cheng
Hu, Shih-Cheng
author_sort Tung, Yun-Chun
collection PubMed
description A negative pressure isolation room is built to accommodate and cure patients with highly infectious diseases. An absolutely airtight space effectively prevents infectious diseases from leaking out of the isolation room. Opening the door leads to a breakdown in isolation conditions and causes the dispersion of infectious air out of the isolation room. Extensively employed to manage smoke in cases of fires at subway and highway tunnels, a concept of controlling airflow is applied to the study. This study proposes a design of ventilation system to control air flow rate for containing airborne contaminant and preventing its spread to the adjacent rooms when the door to the isolation room is opened and closed. This paper employs computational fluid dynamics (CFD) as a more effective approach to examine the concentration maps of airborne contaminants and the airflow patterns of room air and discuss the influence of temperature differences between two rooms on airborne dispersion. Results show that an air velocity above 0.2 m/s via a doorway effectively prevents the spread of airborne contaminants out of the isolation room in the state of door opening.
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spelling pubmed-71084322020-03-31 Numerical study on the dispersion of airborne contaminants from an isolation room in the case of door opening Tung, Yun-Chun Shih, Yang-Cheng Hu, Shih-Cheng Appl Therm Eng Article A negative pressure isolation room is built to accommodate and cure patients with highly infectious diseases. An absolutely airtight space effectively prevents infectious diseases from leaking out of the isolation room. Opening the door leads to a breakdown in isolation conditions and causes the dispersion of infectious air out of the isolation room. Extensively employed to manage smoke in cases of fires at subway and highway tunnels, a concept of controlling airflow is applied to the study. This study proposes a design of ventilation system to control air flow rate for containing airborne contaminant and preventing its spread to the adjacent rooms when the door to the isolation room is opened and closed. This paper employs computational fluid dynamics (CFD) as a more effective approach to examine the concentration maps of airborne contaminants and the airflow patterns of room air and discuss the influence of temperature differences between two rooms on airborne dispersion. Results show that an air velocity above 0.2 m/s via a doorway effectively prevents the spread of airborne contaminants out of the isolation room in the state of door opening. Elsevier Ltd. 2009-06 2008-07-22 /pmc/articles/PMC7108432/ /pubmed/32288590 http://dx.doi.org/10.1016/j.applthermaleng.2008.07.009 Text en Copyright © 2008 Elsevier Ltd. All rights reserved. Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.
spellingShingle Article
Tung, Yun-Chun
Shih, Yang-Cheng
Hu, Shih-Cheng
Numerical study on the dispersion of airborne contaminants from an isolation room in the case of door opening
title Numerical study on the dispersion of airborne contaminants from an isolation room in the case of door opening
title_full Numerical study on the dispersion of airborne contaminants from an isolation room in the case of door opening
title_fullStr Numerical study on the dispersion of airborne contaminants from an isolation room in the case of door opening
title_full_unstemmed Numerical study on the dispersion of airborne contaminants from an isolation room in the case of door opening
title_short Numerical study on the dispersion of airborne contaminants from an isolation room in the case of door opening
title_sort numerical study on the dispersion of airborne contaminants from an isolation room in the case of door opening
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7108432/
https://www.ncbi.nlm.nih.gov/pubmed/32288590
http://dx.doi.org/10.1016/j.applthermaleng.2008.07.009
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