Protected zone ventilation and reduced personal exposure to airborne cross‐infection
Identifieur interne : 001424 ( Main/Exploration ); précédent : 001423; suivant : 001425Protected zone ventilation and reduced personal exposure to airborne cross‐infection
Auteurs : G. Cao [Finlande] ; P. V. Nielsen [Danemark] ; R. L. Jensen [Danemark] ; P. Heiselberg [Danemark] ; L. Liu [Danemark] ; J. Heikkinen [Finlande]Source :
- Indoor Air [ 0905-6947 ] ; 2015-06.
Abstract
The main objective of this study was to examine the performance of protected zone ventilation (PZV) and hybrid protected zone ventilation (HPZV) to reduce the direct exposure to exhaled air from others' breathing. Experimental measurements are carried out to test the performance of PZV in a full‐scale office room with two breathing thermal manikins. The measurements were performed under three configurations, including two standing manikins at different distances: 0.35, 0.5, and 1.1 m. When the supply air velocity is increased to 4 m/s in the downward plane jet, the dimensionless concentration is 40% lower than for fully mixed ventilation, which can be considered as a measure of protection from the zoning condition. The measurement results showed that in both the PZV and the HPZV system it is possible to decrease the transmission of tracer gas from one manikin to the opposite manikin; therefore, it probably would reduce the risk of air borne cross‐infection between two people at the same relative positions. The results suggest that PZV and HPZV may be used to reduce the exposure of people in a protected zone from indoor pollutants emitted in a source zone.
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DOI: 10.1111/ina.12142
Affiliations:
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Jensen</name><affiliation wicri:level="4"><country xml:lang="fr">Danemark</country><wicri:regionArea>Aalborg University, Aalborg</wicri:regionArea><orgName type="university">Université d'Aalborg</orgName><placeName><settlement type="city">Aalborg</settlement><region nuts="2" type="region">Jutland du Nord</region></placeName></affiliation></author><author><name sortKey="Heiselberg, P" sort="Heiselberg, P" uniqKey="Heiselberg P" first="P." last="Heiselberg">P. Heiselberg</name><affiliation wicri:level="4"><country xml:lang="fr">Danemark</country><wicri:regionArea>Aalborg University, Aalborg</wicri:regionArea><orgName type="university">Université d'Aalborg</orgName><placeName><settlement type="city">Aalborg</settlement><region nuts="2" type="region">Jutland du Nord</region></placeName></affiliation></author><author><name sortKey="Liu, L" sort="Liu, L" uniqKey="Liu L" first="L." last="Liu">L. 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Heikkinen</name><affiliation wicri:level="1"><country xml:lang="fr">Finlande</country><wicri:regionArea>Smart Energy and System Integration, VTT Technical Research Centre of Finland, Espoo</wicri:regionArea><wicri:noRegion>Espoo</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j" type="main">Indoor Air</title><title level="j" type="alt">INDOOR AIR</title><idno type="ISSN">0905-6947</idno><idno type="eISSN">1600-0668</idno><imprint><biblScope unit="vol">25</biblScope><biblScope unit="issue">3</biblScope><biblScope unit="page" from="307">307</biblScope><biblScope unit="page" to="319">319</biblScope><biblScope unit="page-count">13</biblScope><date type="published" when="2015-06">2015-06</date></imprint><idno type="ISSN">0905-6947</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0905-6947</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract">The main objective of this study was to examine the performance of protected zone ventilation (PZV) and hybrid protected zone ventilation (HPZV) to reduce the direct exposure to exhaled air from others' breathing. Experimental measurements are carried out to test the performance of PZV in a full‐scale office room with two breathing thermal manikins. The measurements were performed under three configurations, including two standing manikins at different distances: 0.35, 0.5, and 1.1 m. When the supply air velocity is increased to 4 m/s in the downward plane jet, the dimensionless concentration is 40% lower than for fully mixed ventilation, which can be considered as a measure of protection from the zoning condition. The measurement results showed that in both the PZV and the HPZV system it is possible to decrease the transmission of tracer gas from one manikin to the opposite manikin; therefore, it probably would reduce the risk of air borne cross‐infection between two people at the same relative positions. The results suggest that PZV and HPZV may be used to reduce the exposure of people in a protected zone from indoor pollutants emitted in a source zone.</div></front></TEI><affiliations><list><country><li>Danemark</li><li>Finlande</li></country><region><li>Jutland du Nord</li></region><settlement><li>Aalborg</li></settlement><orgName><li>Université d'Aalborg</li></orgName></list><tree><country name="Finlande"><noRegion><name sortKey="Cao, G" sort="Cao, G" uniqKey="Cao G" first="G." last="Cao">G. Cao</name></noRegion><name sortKey="Cao, G" sort="Cao, G" uniqKey="Cao G" first="G." last="Cao">G. Cao</name><name sortKey="Heikkinen, J" sort="Heikkinen, J" uniqKey="Heikkinen J" first="J." last="Heikkinen">J. Heikkinen</name></country><country name="Danemark"><region name="Jutland du Nord"><name sortKey="Nielsen, P V" sort="Nielsen, P V" uniqKey="Nielsen P" first="P. V." last="Nielsen">P. V. Nielsen</name></region><name sortKey="Heiselberg, P" sort="Heiselberg, P" uniqKey="Heiselberg P" first="P." last="Heiselberg">P. Heiselberg</name><name sortKey="Jensen, R L" sort="Jensen, R L" uniqKey="Jensen R" first="R. L." last="Jensen">R. L. Jensen</name><name sortKey="Liu, L" sort="Liu, L" uniqKey="Liu L" first="L." last="Liu">L. Liu</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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