| Issue |
E3S Web Conf.
Volume 172, 2020
12th Nordic Symposium on Building Physics (NSB 2020)
|
|
|---|---|---|
| Article Number | 05008 | |
| Number of page(s) | 6 | |
| Section | Air leakage | |
| DOI | https://doi.org/10.1051/e3sconf/202017205008 | |
| Published online | 30 June 2020 | |
Influence of airtightness of steel sandwich panel joints on heat losses
1 RWTH Aachen University, Sustainable Metal Building Envelopes, 52074 Aachen, Mies-van-der-Rohe-Str. 1, Germany
2 FH Aachen University, Subject Area Building Services, 52066 Aachen, Bayernallee 9, Germany
* Corresponding author: mku@stb.rwth-aachen.de
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.
© The Authors, published by EDP Sciences, 2020
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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