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CFD modelling of aerodynamic sealing by vertical and horizontal air curtains

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dc.contributor.authorGoncalves, J.C.
dc.contributor.authorCosta, J.J.
dc.contributor.authorFigueiredo, A.R.
dc.contributor.authorLopes, A.M.G.
dc.date.accessioned2020-01-23T11:47:22Z
dc.date.available2020-01-23T11:47:22Z
dc.date.issued2012
dc.description.abstractThis work presents a comparative study of the aerodynamic sealing of doorways of refrigerated rooms, obtained by vertical and horizontal air curtain devices (ACD). The sealing efficiency is estimated for different situations, with the ACD installed inside, outside or on both sides of the door. For this purpose, a numerical model was developed for the simulation of the turbulent non-isothermal 3D airflow generated by the air curtain in the transient period after the door is opened. The buoyancyinduced airflow field when the ACD is turned off and the door is open was taken as a reference to assess the sealing efficiency. Numerical results are plausible and comply with the physical interpretation of the convective phenomena. In line with previous investigations, the optimum velocity of the air jet was found, corresponding to the highest sealing effect. The advantage of installing the ACD outside the refrigerated room was shown by the present simulations. According to the present study, downward blowing air curtains present better sealing efficiency (over 70%) compared to horizontal jet air curtains (about 55%). Although the direct air recirculation provides a better sealing efficiency (over 80%), the system complexity and the installation and maintenance costs inhibit its common use.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationGonçalves, J.C., Costa, J.J., Figueiredo, A.R., & Lopes, A.M.G. (2012). CFD modelling of aerodynamic sealing by vertical and horizontal air curtains. Energy and Buildings, 52, 153-160. https://doi.org/10.1016/j.enbuild.2012.06.007.pt_PT
dc.identifier.doi10.1016/j.enbuild.2012.06.007pt_PT
dc.identifier.issn0378-7788
dc.identifier.urihttp://hdl.handle.net/10400.19/6122
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relation.publisherversionhttps://doi.org/10.1016/j.enbuild.2012.06.007pt_PT
dc.subjectAir curtainpt_PT
dc.subjectCFDpt_PT
dc.subjectHeat transferpt_PT
dc.subjectRefrigerated roompt_PT
dc.subjectEnergy consumptionpt_PT
dc.titleCFD modelling of aerodynamic sealing by vertical and horizontal air curtainspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage160pt_PT
oaire.citation.startPage153pt_PT
oaire.citation.titleEnergy and Buildingspt_PT
oaire.citation.volume52pt_PT
person.familyNameGonçalves
person.givenNameJoão Carlos
person.identifier1299655
person.identifier.ciencia-idE411-A4A3-F728
person.identifier.orcid0000-0003-3763-1503
person.identifier.scopus-author-id55951854100
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication397e6196-5fed-44bb-b807-dacd9b85ae27
relation.isAuthorOfPublication.latestForDiscovery397e6196-5fed-44bb-b807-dacd9b85ae27

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