20.500.12556/DiRROS-18317 Treatment of condensation in sandwich panels without known vapour resistance of sealant 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. water vapour condensation water vapour diffusion numerical simulations water vapour resistance linear water vapour transmittance sendwich panels kondenzacija vodne pare difuzija vodne pare numerične simulacije upornost difuzij vodne pare linijska prepustnost za vodno paro true false true EDP Sciences Angleški jezik Slovenski jezik © The Authors, published by EDP Sciences, 2020 Neznano 2024-03-05 08:29:06 2024-03-05 08:32:50 2024-03-06 03:35:35 0000-00-00 00:00:00 2020 0 0 Nasl. z nasl. zaslona; Opis vira z dne 30. 9. 2020; Št. prispevka: 07007; str. 1-7 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2020-06-30 536 2267-1242 10.1051/e3sconf/202017207007 30516739 30483203 https://www.e3s-conferences.org/articles/e3sconf/abs/2020/32/e3sconf_nsb2020_07007/e3sconf_nsb2020_07007.html Odprti dostop 1 ac003799-dab9-11ee-900a-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=24898 RAZ_Vidmar_Gregor_2020.pdf RAZ_Vidmar_Gregor_2020.pdf 1 640B885D7E2D3F21D8D472A011C23A0F 76cfc5bd9481df911b34adeb1f643fbe2ee0afa3ac1225ea74a9782564cca523 2b7425ec-daba-11ee-900a-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=24900 https://doi.org/10.1051/e3sconf/202017207007 0 1fb81821-daba-11ee-900a-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=24899 Zavod za gradbeništvo Slovenije 0 0 0