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A Study on the Sealing Efficiency of Air Curtains: 2D and 3D Approaches

2012Journal article Restricted access
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dc.contributor.authorGoncalves, J. C.
dc.contributor.authorCosta, J.
dc.contributor.authorFigueiredo, R.
dc.contributor.authorLopes, A.
dc.date.accessioned2023-08-22T10:49:59Z
dc.date.available2023-08-22T10:49:59Z
dc.date.issued2012
dc.description.abstractIn industrial refrigerated spaces, such as retail stores, where sometimes doors must be open for long periods, the infiltration loads can represent more than half of the total refrigeration load. The use of air curtains can significantly reduce the air infiltration through doorways and, at the same time, it allows the free access by persons and equipment [1]. Besides the experimental research, computational fluid dynamics (CFD) has been commonly used, either adopting a two dimensional (2D) approach [1] or, more recently, through a three-dimensional (3D) perspective [2,3]. This work presents a numerical and experimental study on the performance of air curtain devices in the aerodynamic sealing of access doors of refrigerated spaces. For this propose, a 3D numerical model was developed aiming at the simulation of the turbulent non-isothermal airflow generated by the air curtain since the moment the door is opened. The calculation domain represents a laboratory scale model consisting of two similar adjacent rooms connected by a doorway over which the air curtain device is installed. One of these rooms represents a refrigerated chamber and the other, the outdoor environment. The numerical study was carried out using a commercial CFD code (ANSYS-CFX) and the turbulence effects were approached by k-_SST turbulent model. In the experimental study, the tracer gas technique was used to estimate the air exchange rate through the doorway in the initial period of the transient process and consequently assess the sealing effect obtained with the air curtain device operating at different jet velocities. The numerical results show that the air curtain simulated is appropriate to protect the doorway in its whole width, and a good agreement is verified with the experimental measurements. Results of a simplified 2D approach are also shown and compared with the 3D simulationpt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationGonçalves, J.C., Costa, J., Figueiredo, R. & Lopes, A. (2012, fevereiro, 22-24). A Study on the Sealing Efficiency of Air Curtains: 2D and 3D Approaches. In CYTEF 2012, VI Congreso Ibérico y IV Congreso Iberoamericano de Ciencias y Técnicas del Frío, Madrid, España. https://iifiir.org/en/fridoc/a-study-on-the-sealing-efficiency-of-air-curtains-2d-and-3d-approaches-28586.pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.19/7915
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherCYTEF-2012. VI Congreso Ibérico y VI Congreso Iberoamericano de Ciencias y Técnicas del Fríopt_PT
dc.relation.publisherversionhttps://iifiir.org/en/fridoc/a-study-on-the-sealing-efficiency-of-air-curtains-2d-and-3d-approaches-28586pt_PT
dc.subjectRefrigerated roompt_PT
dc.subjectAir curtainpt_PT
dc.subjectSealing efficiencypt_PT
dc.subjectCFDpt_PT
dc.subjectInfiltration loadpt_PT
dc.titleA Study on the Sealing Efficiency of Air Curtains: 2D and 3D Approachespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceMadridpt_PT
oaire.citation.startPage11 p.pt_PT
oaire.citation.titleCYTEF 2012, VI Congreso Ibérico y IV Congreso Iberoamericano de Ciencias y Técnicas del Fríopt_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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