Experimental Analysis of the Hygrothermal Performance of New Aerogel-Based Insulating Building Materials in Real Weather Conditions: Full-Scale Application Study
Aerogel-based building materials represent a promising new direction to achieve remarkable energy performance by applying new layers on existing or newly built walls. Expectations of thermal performance for new aerogel materials are necessarily high. Nevertheless, it is hard to match very promising laboratory thermal performance with full-scale, real weather exposed wall performance. In this paper, a detailed experimental analysis shows the application of ISO 9869 standard method to a newly built low U-value wall and discusses its possible extension in order to reduce the measurement time necessary to obtain stabilized values. Moisture content measurements complete the heat flux data on both sides of the wall. As expected, the moisture content significantly affects the thermal performance, even several months after the construction of the new wall. Therefore, the stabilized U-value had not been reached after 6 months of measurement. At the end of the paper, some recommendations highlight the importance of the drying process.
KeywordsAerogel Wall Full-scale Experimental U-value ISO 9869
The research leading to these results has been performed within the WALL-ACE project (www.wall-ace.eu) and received funding from the European Community’s Horizon 2020 Work Program (H2020/2014–2020) within the Energy-efficient buildings 2016–2017 call, under the grant agreement N° 723574.
- 1.European Union Directive 2010/31/EU of the European Parliament and of the Council of 19 May 2010 on the energy performance of buildings (recast) L153/13-35 (2010). https://eur-lex.europa.eu/LexUriServ.do?uri=OJ:L:2010:153:0013:0035:en:PDF. Accessed 30 Apr 2019
- 2.WALL-ACE EU H2020 Project. https://www.wall-ace.eu/
- 3.Ibrahim, M., Nocentini, K., Stipetic, M., Dantz, S., Caiazzo, F.G., Sayegh, H., Bianco, L.: Multi-field and multi-scale characterization of novel super insulating panels/systems based on silica aerogels: thermal, hydric, mechanical, acoustic, and fire performance. Build. Environ. 151, 30–42 (2019)CrossRefGoogle Scholar
- 4.Fantucci, S., Fenoglio, E., Grosso, G., Serra, V., Perino, M., Dutto, M., Marino, V.: Retrofit of the existing buildings using a novel developed aerogel-based coating: results from an in-field monitoring. In: 7th International Building Physics Conference, IBPC2018, Syracuse, NY, USA (2018)Google Scholar
- 9.ISO 6946:2017, International Organization for Standardization: Building components and building elements—thermal resistance and thermal transmittance—calculation methods (2017)Google Scholar
- 10.ISO 9869-1, International Organization for Standardization: Thermal insulation—building elements—in-situ measurement of thermal resistance and thermal transmittance—Part 1: Heat flow meter method (2014)Google Scholar
- 13.Soares, N., Martins, C., Gonçalves, M., Santos, P., Simoes da Silva, L., Costa, J.J.: Laboratory and in-situ non-destructive methods to evaluate the thermal transmittance and behavior of walls, windows, and construction elements with innovative materials: a review. Energy Build. 182, 88–110 (2019)CrossRefGoogle Scholar
- 15.Hukseflux Thermal Sensors, User Manual HFP01. https://www.hukseflux.com/uploads/product-documents/HFP01_HFP03_manual_v1721.pdf. Accessed 30 Apr 2019
- 16.TC Direct. https://www.tcdirect.co.uk/