About: Thermal CFD Analysis of Tubular Light Guides

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://www.mdpi.com/1996-1073/6/12/6304
Description	Tubular light guides are applicable for daylighting of windowless areas in buildings. Despite their many positive indoor climate aspects they can also present some problems with heat losses and condensation. A computer CFD model focused on the evaluation of temperature distribution and air flow inside tubular light guides of different dimensions was studied. The physical model of the tested light guides of lengths more than 0.60 m proves shows that Rayleigh numbers are adequate for a turbulent air flow. The turbulent model was applied despite the small heat flux differences between the turbulent and laminar model. The CFD simulations resulted into conclusions that the growing ratio of length/diameter increases the heat transmission loss/linear transmittance as much as by 50 percent. Tubular light guides of smaller diameters have lower heat transmission losses compared to the wider ones of the same lengths with the same outdoor temperature being taken into account. The simulation results confirmed the Tubular light guides are applicable for daylighting of windowless areas in buildings. Despite their many positive indoor climate aspects they can also present some problems with heat losses and condensation. A computer CFD model focused on the evaluation of temperature distribution and air flow inside tubular light guides of different dimensions was studied. The physical model of the tested light guides of lengths more than 0.60 m proves shows that Rayleigh numbers are adequate for a turbulent air flow. The turbulent model was applied despite the small heat flux differences between the turbulent and laminar model. The CFD simulations resulted into conclusions that the growing ratio of length/diameter increases the heat transmission loss/linear transmittance as much as by 50 percent. Tubular light guides of smaller diameters have lower heat transmission losses compared to the wider ones of the same lengths with the same outdoor temperature being taken into account. The simulation results confirmed the (en)
Title	Thermal CFD Analysis of Tubular Light Guides Thermal CFD Analysis of Tubular Light Guides (en)
skos:prefLabel	Thermal CFD Analysis of Tubular Light Guides Thermal CFD Analysis of Tubular Light Guides (en)
skos:notation	RIV/00216305:26110/13:PU106183!RIV15-MSM-26110___
http://linked.open...avai/riv/aktivita	P S
http://linked.open...avai/riv/aktivity	P(EE2.3.30.0039), S
http://linked.open...iv/cisloPeriodika	12
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Šikula, Ondřej Mohelníková, Jitka Plášek, Josef
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Vysoké učení technické v Brně / Fakulta stavební
http://linked.open...dnocenehoVysledku	110883
http://linked.open...ai/riv/idVysledku	RIV/00216305:26110/13:PU106183
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	computer simulation, ANSYS Fluent, CFD model, tubular light guides, thermal bridges, temperature distribution, air flow, thermal radiation, discrete transfer radiation model (en)
http://linked.open.../riv/klicoveSlovo	thermal radiation ANSYS Fluent temperature distribution computer simulation thermal bridges discrete transfer radiation model tubular light guides CFD model air flow
http://linked.open...odStatuVydavatele	CH - Švýcarská konfederace
http://linked.open...ontrolniKodProRIV	[43C3C8CE881C]
http://linked.open...i/riv/nazevZdroje	ENERGIES
http://linked.open...in/vavai/riv/obor	JN
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...vavai/riv/projekt	Excellent young researcher at BUT
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	6
http://linked.open...iv/tvurceVysledku	Mohelníková, Jitka Šikula, Ondřej Plášek, Josef
http://linked.open...ain/vavai/riv/wos	000330290600011
issn	1996-1073
number of pages	18 (xsd:int)
http://bibframe.org/vocab/doi	10.3390/en6126304
http://localhost/t...ganizacniJednotka	26110

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