Convective heat transfer inside planar solar collectors

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dc.contributor.authorFicker, Tomášcs
dc.coverage.issue1cs
dc.coverage.volume960cs
dc.date.accessioned2021-04-20T18:55:45Z
dc.date.available2021-04-20T18:55:45Z
dc.date.issued2020-12-09cs
dc.description.abstractThere is a permanent interest in improving the construction and thermal properties of the planar solar collectors. Minimizing the heat losses of the collectors and improving their energy gains are some of the relevant research goals. Convective heat transfer inside the cavity of planar collectors has been determined theoretically and numerically in this conference contribution. The convective heat transfer is computed on the basis of physical relations using the correlation relations of Nusselt’s number. The Nusselt number has been expressed by means of Rayleigh`s and Prandtl’s numbers. The convective heat transfer inside the cavities of planar solar collectors represents essential part of heat losses that lower the effectiveness of these collectors. In this conference contribution the convective heat losses have been compared with the standard density of heat flow coming from the Sun and the corresponding energy ratio has been determined. It has been shown that this ratio amounts almost 10 %. A typical summer environment has been supposed with a standard sunshine reaching 1000 Wm-2. The common type of the planar solar collector with geometrical dimensions 2m x 1m x 0.05m and cavity filled by air has been investigated. The temperature of the absorber has been supposed to be 70 °C whereas the temperature of the glass plate placed on the top side of the collector has been assumed to be 35 °C.en
dc.formattextcs
dc.format.extent1-5cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationIOP Conference Series: Materials Science and Engineering. 2020, vol. 960, issue 1, p. 1-5.en
dc.identifier.doi10.1088/1757-899X/960/2/022020cs
dc.identifier.issn1757-8981cs
dc.identifier.other169532cs
dc.identifier.urihttp://hdl.handle.net/11012/196540
dc.language.isoencs
dc.publisherIOP Publishingcs
dc.relation.ispartofIOP Conference Series: Materials Science and Engineeringcs
dc.relation.urihttps://iopscience.iop.org/article/10.1088/1757-899X/960/2/022020cs
dc.rightsCreative Commons Attribution 3.0 Unportedcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1757-8981/cs
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/cs
dc.subjectSolar collectoren
dc.subjectconvective heat transferen
dc.subjectNusselt numberen
dc.subjectcorrelation functionen
dc.subjectheat loss.en
dc.titleConvective heat transfer inside planar solar collectorsen
dc.type.driverconferenceObjecten
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-169532en
sync.item.dbtypeVAVen
sync.item.insts2022.03.08 16:56:37en
sync.item.modts2022.03.08 16:15:16en
thesis.grantorVysoké učení technické v Brně. Fakulta stavební. Ústav fyzikycs
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