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Influence of airtightness of steel sandwich panel joints on heat losses

  • Energy saving ordinances requires that buildings must be designed in such a way that the heat transfer surface including the joints is permanently air impermeable. The prefabricated roof and wall panels in lightweight steel constructions are airtight in the area of the steel covering layers. The sealing of the panel joints contributes to fulfil the comprehensive requirements for an airtight building envelope. To improve the airtightness of steel sandwich panels, additional sealing tapes can be installed in the panel joint. The influence of these sealing tapes was evaluated by measurements carried out by the RWTH Aachen University - Sustainable Metal Building Envelopes. Different installation situations were evaluated by carrying out airtightness tests for different joint distances. In addition, the influence on the heat transfer coefficient was also evaluated using the Finite Element Method (FEM). The combination of obtained air volume flow and transmission losses enables to create an "effective heat transfer coefficient" due to transmission and infiltration. This summarizes both effects in one value and is particularly helpful for approximate calculations on energy efficiency.

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Metadaten
Author:Markus Kuhnhenne, Vitali Reger, Dominik Pyschny, Bernd Döring
DOI:https://doi.org/10.1051/e3sconf/202017205008
Parent Title (English):E3S Web of Conferences 12th Nordic Symposium on Building Physics (NSB 2020)
Publisher:EDP Sciences
Place of publication:Les Ulis
Document Type:Article
Language:English
Year of Completion:2020
Date of the Publication (Server):2020/08/14
Volume:172
Issue:Art. 05008
Length:6
Link:https://doi.org/10.1051/e3sconf/202017205008
Zugriffsart:weltweit
Institutes:FH Aachen / Fachbereich Bauingenieurwesen
collections:Verlag / EDP Sciences
Open Access / Diamond
Licence (German):License LogoCreative Commons - Namensnennung