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Title:Treatment of condensation in sandwich panels without known vapour resistance of sealant
Authors:ID Vidmar, Gregor (Author)
Files:URL URL - Source URL, visit https://www.e3s-conferences.org/articles/e3sconf/abs/2020/32/e3sconf_nsb2020_07007/e3sconf_nsb2020_07007.html
Description: Odprti dostop
 
.pdf PDF - Presentation file, download (2,11 MB)
MD5: 640B885D7E2D3F21D8D472A011C23A0F
 
URL URL - Source URL, visit https://doi.org/10.1051/e3sconf/202017207007
 
Language:English
Typology:1.08 - Published Scientific Conference Contribution
Organization:Logo ZAG - Slovenian National Building and Civil Engineering Institute
Abstract:In order to calculate amount of interstitial condensation in a building envelope, water vapour resistance of each layer is of importance. Once having it, 1D calculation according to ISO 13788 with monthly average vapour pressures can be applied. In EN 14509 sandwich panels are considered to be impermeable for water vapour, thus (according to the standard) water vapour cannot enter from outside and condensate in the panels. But it is not always true for real sandwich panels, because joints between neighbouring panels can cause non-neglecting water vapour bridges. Although in measurements of linear water vapour transmittance of the joints (Ψv) stationary boundary vapour pressures can be applied, the measurements can be long lasting. We shortened time needed to get Ψv performing simulations in Delphin6.0. We simulated panels and steel sheets with joints using constant boundary vapour pressures and compared the results with the results of measurements on the equivalent systems. In systems under consideration a sealant in built-in-state, located at a joint of a sandwich panel, is a compressed EPDM tube. It is impossible to directly measure its effective μ according to ISO 12572. In the paper we study to which precision it is possible to determine it using measurements and simulations. Once having effective μ of the sealant (if all other necessary material parameters available) one can simulate condensation in envelopes including sandwich panels in 2D according to EN 15026 using hourly climatic data. Another goal of the study was determination of differences in resulting Ψv values when varying narrowest part of the gap dGAP at the joint in the panels without any sealant. Results confirm significant sensibility of Ψv to variations of dGAP.
Keywords:water vapour condensation, water vapour diffusion, numerical simulations, water vapour resistance, linear water vapour transmittance, sendwich panels
Publication status:Published
Publication version:Version of Record
Publication date:30.06.2020
Publisher:EDP Sciences
Year of publishing:2020
Number of pages:str. 1-7
PID:20.500.12556/DiRROS-18317 New window
UDC:536
ISSN on article:2267-1242
DOI:10.1051/e3sconf/202017207007 New window
COBISS.SI-ID:30516739 New window
Copyright:© The Authors, published by EDP Sciences, 2020
Note:Nasl. z nasl. zaslona; Opis vira z dne 30. 9. 2020; Št. prispevka: 07007;
Publication date in DiRROS:05.03.2024
Views:827
Downloads:457
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VIDMAR, Gregor, 2020, Treatment of condensation in sandwich panels without known vapour resistance of sealant. In : NSB 2020 [online]. Published Scientific Conference Contribution. EDP Sciences. 2020. p. 1–7. [Accessed 21 April 2025]. Retrieved from: https://dirros.openscience.si/IzpisGradiva.php?lang=eng&id=18317
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Record is a part of a proceedings

Title:NSB 2020
COBISS.SI-ID:30483203 New window

Record is a part of a journal

Title:E3S web of conferences
Shortened title:E3S web conf.
Publisher:EDP Sciences
ISSN:2267-1242
COBISS.SI-ID:26976295 New window

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License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

Language:Slovenian
Keywords:kondenzacija vodne pare, difuzija vodne pare, numerične simulacije, upornost difuzij vodne pare, linijska prepustnost za vodno paro


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