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Article: Particle removal efficiency of the portable HEPA air cleaner in a simulated hospital ward

TitleParticle removal efficiency of the portable HEPA air cleaner in a simulated hospital ward
Authors
Keywordshospital ward
particle
portable HEPA filter
Issue Date2010
PublisherTsinghua University Press & Springer-Verlag GmbH. The Journal's web site is located at http://www.springerlink.com/content/1996-3599/
Citation
Building Simulation, 2010, p. 1-10 How to Cite?
AbstractUse of a HEPA (high efficiency particulate air) filter in a room is believed to assist in reducing the risk of transmission of infectious diseases through removing the particles or large droplets to which pathogens may be attached. Use of a portable HEPA filter(s) in hospital wards is hypothesized to increase the effective ventilation rate (for particles only). Use of a portable HEPA filter is also hypothesized to increase the effective airflow rate of the general ward to the standard of an isolation ward for emerging infection diseases. This may be a good solution for housing patients when the number of beds in an isolation ward is insufficient. An experiment was conducted in a full scale experimental ward with a dimension of 6.7 m × 6 m × 2.7 m and 6 beds to test these hypotheses for a portable HEPA filter. The removal efficiency for different size particles was measured at different locations. The influence of the portable HEPA air cleaner on the airflow pattern was also studied through smoke visualization and computational fluid dynamics (CFD) simulations. Results show that the HEPA filter can effectively decrease the particle concentration level. The effective air change rate achieved by the HEPA filter (for particle removal only) is from 2.7 to 5.6 ACH in the ward. The strong supply air jet from the portable HEPA filter interacted with the room airflow pattern and became dominate, introducing global airflow mixing in the room. Background noise levels were also measured and noise level in the room increased when the maximum airflow of the filter was used. © 2010 Tsinghua University Press and Springer-Verlag Berlin Heidelberg.
Persistent Identifierhttp://hdl.handle.net/10722/139352
ISSN
2015 Impact Factor: 1.409
2015 SCImago Journal Rankings: 1.054
ISI Accession Number ID
Funding AgencyGrant Number
Research Grants Council of the Hong Kong SAR GovernmentHKU 7150/06E
National Nature and Science Foundation of China (NSFC)50808038
Jiangsu Nature and Science FoundationBK2009289
Funding Information:

The work described in this paper was supported by the Research Grants Council of the Hong Kong SAR Government (Project No. HKU 7150/06E), Research Grants from National Nature and Science Foundation of China (NSFC) (Project No. 50808038), and Jiangsu Nature and Science Foundation (Project No. BK2009289).

Grants

 

DC FieldValueLanguage
dc.contributor.authorQian, Hen_HK
dc.contributor.authorLi, Yen_HK
dc.contributor.authorSun, Hen_HK
dc.contributor.authorNielsen, PVen_HK
dc.contributor.authorHuang, Xen_HK
dc.contributor.authorZheng, Xen_HK
dc.date.accessioned2011-09-23T05:48:44Z-
dc.date.available2011-09-23T05:48:44Z-
dc.date.issued2010en_HK
dc.identifier.citationBuilding Simulation, 2010, p. 1-10en_HK
dc.identifier.issn1996-3599en_HK
dc.identifier.urihttp://hdl.handle.net/10722/139352-
dc.description.abstractUse of a HEPA (high efficiency particulate air) filter in a room is believed to assist in reducing the risk of transmission of infectious diseases through removing the particles or large droplets to which pathogens may be attached. Use of a portable HEPA filter(s) in hospital wards is hypothesized to increase the effective ventilation rate (for particles only). Use of a portable HEPA filter is also hypothesized to increase the effective airflow rate of the general ward to the standard of an isolation ward for emerging infection diseases. This may be a good solution for housing patients when the number of beds in an isolation ward is insufficient. An experiment was conducted in a full scale experimental ward with a dimension of 6.7 m × 6 m × 2.7 m and 6 beds to test these hypotheses for a portable HEPA filter. The removal efficiency for different size particles was measured at different locations. The influence of the portable HEPA air cleaner on the airflow pattern was also studied through smoke visualization and computational fluid dynamics (CFD) simulations. Results show that the HEPA filter can effectively decrease the particle concentration level. The effective air change rate achieved by the HEPA filter (for particle removal only) is from 2.7 to 5.6 ACH in the ward. The strong supply air jet from the portable HEPA filter interacted with the room airflow pattern and became dominate, introducing global airflow mixing in the room. Background noise levels were also measured and noise level in the room increased when the maximum airflow of the filter was used. © 2010 Tsinghua University Press and Springer-Verlag Berlin Heidelberg.en_HK
dc.languageengen_US
dc.publisherTsinghua University Press & Springer-Verlag GmbH. The Journal's web site is located at http://www.springerlink.com/content/1996-3599/en_HK
dc.relation.ispartofBuilding Simulationen_HK
dc.rightsThe original publication is available at www.springerlink.com-
dc.subjecthospital warden_HK
dc.subjectparticleen_HK
dc.subjectportable HEPA filteren_HK
dc.titleParticle removal efficiency of the portable HEPA air cleaner in a simulated hospital warden_HK
dc.typeArticleen_HK
dc.identifier.emailLi, Y:liyg@hkucc.hku.hken_HK
dc.identifier.authorityLi, Y=rp00151en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1007/s12273-010-0005-4en_HK
dc.identifier.scopuseid_2-s2.0-79960912833-
dc.identifier.hkuros192414en_US
dc.identifier.volume3en_US
dc.identifier.issue3-
dc.identifier.spage1en_HK
dc.identifier.epage10en_HK
dc.identifier.isiWOS:000289291300004-
dc.publisher.placeChinaen_HK
dc.relation.projectBioPassVent - a theory of enclosure ventilation for purging combined pollutants-
dc.identifier.scopusauthoridQian, H=36091859600en_HK
dc.identifier.scopusauthoridLi, Y=7502094052en_HK
dc.identifier.scopusauthoridSun, H=7404828427en_HK
dc.identifier.scopusauthoridNielsen, PV=24773772900en_HK
dc.identifier.scopusauthoridHuang, X=36188341400en_HK
dc.identifier.scopusauthoridZheng, X=35112196400en_HK
dc.identifier.citeulike7772896-

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