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Article: Natural ventilation induced by combined wind and thermal forces
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TitleNatural ventilation induced by combined wind and thermal forces
 
AuthorsLi, Y1
Delsante, A1
 
Issue Date2001
 
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/buildenv
 
CitationBuilding And Environment, 2001, v. 36 n. 1, p. 59-71 [How to Cite?]
DOI: http://dx.doi.org/10.1016/S0360-1323(99)00070-0
 
AbstractAnalytical solutions are derived for calculating natural ventilation flow rates and air temperatures in a single-zone building with two openings when no thermal mass is present. In these solutions, the independent variables are the heat source strength and wind speed, rather than given indoor air temperatures. Three air change rate parameters α, β and γ are introduced to characterise, respectively, the effects of the thermal buoyancy force, the envelope heat loss and the wind force. Non-dimensional graphs are presented for calculating ventilation flow rates and air temperatures, and for sizing ventilation openings. The wind can either assist the buoyancy force or oppose the airflow. For assisting winds, the flow is always upwards and the solutions are straightforward. For opposing winds, the flow can be either upwards or downwards depending on the relative strengths of the two forces. In this case, the solution for the flow rate as a function of the heat source strength presents some complex features. A simple dynamical analysis is carried out to identify the stable solutions. (C) 2000 Elsevier Science Ltd. All rights reserved. | Analytical solutions are derived for calculating natural ventilation flow rates and air temperatures in a single-zone building with two openings when no thermal mass is present. In these solutions, the independent variables are the heat source strength and wind speed, rather than given indoor air temperatures. Three air change rate parameters α, β and γ are introduced to characterize, respectively, the effects of the thermal buoyancy force, the envelope heat loss and the wind force. Non-dimensional graphs are presented for calculating ventilation flow rates and air temperatures, and for sizing ventilation openings. The wind can either assist the buoyancy force or oppose the airflow. For assisting winds, the flow is always upwards and the solutions are straightforward. For opposing winds, the flow can be either upwards or downwards depending on the relative strengths of the two forces. In this case, the solution for the flow rate as a function of the heat source strength presents some complex features. A simple dynamical analysis is carried out to identify the stable solutions.
 
ISSN0360-1323
2013 Impact Factor: 2.700
2013 SCImago Journal Rankings: 1.634
 
DOIhttp://dx.doi.org/10.1016/S0360-1323(99)00070-0
 
ISI Accession Number IDWOS:000089690200006
 
ReferencesReferences in Scopus
 
DC FieldValue
dc.contributor.authorLi, Y
 
dc.contributor.authorDelsante, A
 
dc.date.accessioned2012-08-08T08:43:05Z
 
dc.date.available2012-08-08T08:43:05Z
 
dc.date.issued2001
 
dc.description.abstractAnalytical solutions are derived for calculating natural ventilation flow rates and air temperatures in a single-zone building with two openings when no thermal mass is present. In these solutions, the independent variables are the heat source strength and wind speed, rather than given indoor air temperatures. Three air change rate parameters α, β and γ are introduced to characterise, respectively, the effects of the thermal buoyancy force, the envelope heat loss and the wind force. Non-dimensional graphs are presented for calculating ventilation flow rates and air temperatures, and for sizing ventilation openings. The wind can either assist the buoyancy force or oppose the airflow. For assisting winds, the flow is always upwards and the solutions are straightforward. For opposing winds, the flow can be either upwards or downwards depending on the relative strengths of the two forces. In this case, the solution for the flow rate as a function of the heat source strength presents some complex features. A simple dynamical analysis is carried out to identify the stable solutions. (C) 2000 Elsevier Science Ltd. All rights reserved. | Analytical solutions are derived for calculating natural ventilation flow rates and air temperatures in a single-zone building with two openings when no thermal mass is present. In these solutions, the independent variables are the heat source strength and wind speed, rather than given indoor air temperatures. Three air change rate parameters α, β and γ are introduced to characterize, respectively, the effects of the thermal buoyancy force, the envelope heat loss and the wind force. Non-dimensional graphs are presented for calculating ventilation flow rates and air temperatures, and for sizing ventilation openings. The wind can either assist the buoyancy force or oppose the airflow. For assisting winds, the flow is always upwards and the solutions are straightforward. For opposing winds, the flow can be either upwards or downwards depending on the relative strengths of the two forces. In this case, the solution for the flow rate as a function of the heat source strength presents some complex features. A simple dynamical analysis is carried out to identify the stable solutions.
 
dc.description.naturelink_to_subscribed_fulltext
 
dc.identifier.citationBuilding And Environment, 2001, v. 36 n. 1, p. 59-71 [How to Cite?]
DOI: http://dx.doi.org/10.1016/S0360-1323(99)00070-0
 
dc.identifier.doihttp://dx.doi.org/10.1016/S0360-1323(99)00070-0
 
dc.identifier.epage71
 
dc.identifier.isiWOS:000089690200006
 
dc.identifier.issn0360-1323
2013 Impact Factor: 2.700
2013 SCImago Journal Rankings: 1.634
 
dc.identifier.issue1
 
dc.identifier.scopuseid_2-s2.0-0035238968
 
dc.identifier.spage59
 
dc.identifier.urihttp://hdl.handle.net/10722/156585
 
dc.identifier.volume36
 
dc.languageeng
 
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/buildenv
 
dc.publisher.placeUnited Kingdom
 
dc.relation.ispartofBuilding and Environment
 
dc.relation.referencesReferences in Scopus
 
dc.titleNatural ventilation induced by combined wind and thermal forces
 
dc.typeArticle
 
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Author Affiliations
  1. CSIRO Manufacturing and Materials Technology