Solar Decathlon - New Ways of Construction for Decarbonised Buildings
Abstract
For the international building competition Solar Decathlon Europe 2021/22, an extension to an existing building was developed with the aim of sustainable construction and minimal carbon footprint in operation for both the moderately renovated existing building and its extension. Prefabricated timber elements are used for the construction, which were developed with the aim of long-term CO2 sequestration and the separability and recycling of the components. The highly thermally insulated building envelope, passive solar gains and ventilation with heat recovery form the basis for covering the demand for heat and electricity through façade-integrated PVT collectors and a PV system on the roof. A novel storage system, which uses the weighting of the wooden ceilings for impact sound insulation, decouples generation and consumption. A representative section of the design with a usable area of 60 m² was built for the competition. This article presents the concept and planning of the extenion of the building and presents the construction and operating results from the competition phase.