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Naslov:Novel thermal insulation with gas-filled cavities - assessment of thermal performance of different designs based on numerical simulations of heat transfer
Avtorji:ID Jukić, Miha (Avtor)
ID Jordan, Sabina (Avtor)
ID Lisičić, Danijel (Avtor)
Datoteke:URL URL - Izvorni URL, za dostop obiščite https://www.witpress.com/elibrary/cmem-volumes/7/2/2388
 
.pdf PDF - Predstavitvena datoteka, prenos (1,21 MB)
MD5: 68FE88B5C173795363D00CFDB41FC903
 
Jezik:Angleški jezik
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:Logo ZAG - Zavod za gradbeništvo Slovenije
Povzetek:Not only is the energy efficiency of buildings nowadays becoming more and more important; the legislative requirements, the people’s awareness of the environmental questions and their thermal comfort expectations are also on a much higher level. All of these issues can be addressed by making the building envelope more thermally resistant. However, with the traditional thermal insulation materials the thickness of thermal insulation layers is already at the viable limits. Therefore, the development of new, more efficient thermal insulation products with a higher thermal resistance is highly promoted. Preliminary research results can be applied to models to develop and confirm the conceptual designs of such new materials. In this paper, an analysis of thermal performance is presented for a novel thermal insulation consisting of graphite polystyrene (GPS) matrix with cavities filled with an insulative gas, and a protective sheath to prevent it from leaking. Bearing in mind the suitability for later production, different configurations of the assembly were considered, regarding the matrix geometry, the type of the gas filling, and the surface emissivity of the cavities. A range of numerical simulations of heat transfer was conducted to determine the efficiency of different designs in reducing the conductive, the convective, and the radiative heat transfer. Advantages, limitations and some detailed parameters of the proposed design concepts were determined, which were then used for optimisation. The analysis of the results indicates that the equivalent thermal conductance of a GPS panel can be significantly reduced by the introduction of gas-filled cavities. The reduction is highly dependent on the type of the gas filling (thermal conductivity, viscosity, specific heat, etc.), the size of the cavities, and the cavity surface emissivity.
Ključne besede:gas-filled cavities, graphite polystyrene, numerical simulation, thermal insulation
Status publikacije:Objavljeno
Verzija publikacije:Objavljena publikacija
Datum objave:01.01.2019
Založnik:WIT Press
Leto izida:2019
Št. strani:str. 181-192
Številčenje:Vol. 7, no. 2
PID:20.500.12556/DiRROS-17000 Novo okno
UDK:624
ISSN pri članku:2046-0546
DOI:10.2495/CMEM-V7-N2-181-192 Novo okno
COBISS.SI-ID:2439527 Novo okno
Avtorske pravice:© 2019 WIT Press
Datum objave v DiRROS:15.09.2023
Število ogledov:893
Število prenosov:394
Metapodatki:XML DC-XML DC-RDF
:
JUKIĆ, Miha, JORDAN, Sabina in LISIČIĆ, Danijel, 2019, Novel thermal insulation with gas-filled cavities - assessment of thermal performance of different designs based on numerical simulations of heat transfer. International journal of computational methods and experimental measurements [na spletu]. 2019. Vol. 7, no. 2, p. 181–192. [Dostopano 28 april 2025]. DOI 10.2495/CMEM-V7-N2-181-192. Pridobljeno s: https://dirros.openscience.si/IzpisGradiva.php?lang=slv&id=17000
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Gradivo je del revije

Naslov:International journal of computational methods and experimental measurements
Skrajšan naslov:Int. j. comput. methods & experiment. meas.
Založnik:WIT Press
ISSN:2046-0546
COBISS.SI-ID:16862998 Novo okno

Gradivo je financirano iz projekta

Financer:Drugi - Drug financer ali več financerjev
Program financ.:Operational Programme for Implementing European Cohesion Policy 2014–2020

Licence

Licenca:Drugo
Opis:This paper will be freely available, without charge, for users to read, download, copy, distribute, print, search, link to the full text, or use for any other lawful purpose, without asking prior permission from the publisher or the author as long as the author/copyright holder is attributed
Vezano na:https://www.witpress.com/downloads/authors/pdf/pubagreement.pdf

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:odprtine zapolnjene s plinom, grafitni EPS, numerične simulacije, toplotna izolacija


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