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Title:Novel thermal insulation with gas-filled cavities - assessment of thermal performance of different designs based on numerical simulations of heat transfer
Authors:ID Jukić, Miha (Author)
ID Jordan, Sabina (Author)
ID Lisičić, Danijel (Author)
Files:URL URL - Source URL, visit https://www.witpress.com/elibrary/cmem-volumes/7/2/2388
 
.pdf PDF - Presentation file, download (1,21 MB)
MD5: 68FE88B5C173795363D00CFDB41FC903
 
Language:English
Typology:1.01 - Original Scientific Article
Organization:Logo ZAG - Slovenian National Building and Civil Engineering Institute
Abstract: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.
Keywords:gas-filled cavities, graphite polystyrene, numerical simulation, thermal insulation
Publication status:Published
Publication version:Version of Record
Publication date:01.01.2019
Publisher:WIT Press
Year of publishing:2019
Number of pages:str. 181-192
Numbering:Vol. 7, no. 2
PID:20.500.12556/DiRROS-17000 New window
UDC:624
ISSN on article:2046-0546
DOI:10.2495/CMEM-V7-N2-181-192 New window
COBISS.SI-ID:2439527 New window
Copyright:© 2019 WIT Press
Publication date in DiRROS:15.09.2023
Views:884
Downloads:389
Metadata:XML DC-XML DC-RDF
:
JUKIĆ, Miha, JORDAN, Sabina and 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 [online]. 2019. Vol. 7, no. 2, p. 181–192. [Accessed 24 April 2025]. DOI 10.2495/CMEM-V7-N2-181-192. Retrieved from: https://dirros.openscience.si/IzpisGradiva.php?lang=eng&id=17000
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Record is a part of a journal

Title:International journal of computational methods and experimental measurements
Shortened title:Int. j. comput. methods & experiment. meas.
Publisher:WIT Press
ISSN:2046-0546
COBISS.SI-ID:16862998 New window

Document is financed by a project

Funder:Other - Other funder or multiple funders
Funding programme:Operational Programme for Implementing European Cohesion Policy 2014–2020

Licences

License:Other
Description: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
Applies to:https://www.witpress.com/downloads/authors/pdf/pubagreement.pdf

Secondary language

Language:Slovenian
Keywords:odprtine zapolnjene s plinom, grafitni EPS, numerične simulacije, toplotna izolacija


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