New construction MFH power plant B, Bennau
2008
The multi-family house Kraftwerk B is located in the village center of Bennau/SZ, right next to the Catholic church. It is the 1st plus-energy house in Switzerland, which means that it produces more energy than it consumes.
The project
The structure The basic structure is kept very compact and thus also very energy efficient. Under the gable roof are a total of 7 apartments. Behind the wooden element facade is a massive concrete skeleton building, which serves as a mass storage.in the interior, exposed concrete, clay plaster and oak parquet dominate.
The construction
The execution The whole building is the 1st PlusEnergy MFH in Switzerland. Plusenergy means that this building produces more energy than its inhabitants and the building itself consume. Thermal energy is obtained through the south facade, which consists of solar collectors. A 24'000 l storage tank in the basement serves as heat storage. Passive solar energy is used through the large windows facing south. The electrical energy is generated by the full-surface photovoltaic system on the south-facing gable roof and on the pavilion roof. Through the use of natural, preferably untreated building materials, the ECO label is also achieved in addition to Minergie-P. This PlusEnergieBau won a solar prize in 2009 and 2010.
Construction Data
- Wooden element thickness 58 cm
- Thermal insulation cellulose/rock wool 48 cm
- Hot water tank 24'000 liters
- Photovoltaic system 33'000 W
Services of Timbatec
- SIA Phase 31 Preliminary design
- SIA Phase 32 Construction project
- SIA Phase 41 Tendering and comparison of offers
- Site supervision and site inspections
Photo voltaic system
3S Swiss Solar System
3250 Lyss
Timber construction
Dettling Holzbau AG
6440 Brunnen
Architect
Grab Architekten AG
8852 Altendorf
Solar system
Heizplan AG
9473 Gams
Building owner
Sanjo Immobilien AG
8852 Altendorf
Power Plant B: "Plus" achieved
TEC21 3-4/2013 - The multi-family house "Kraftwerk B" in Bennau SZ was awarded the Swiss Solar Prize as an exemplary plus-energy house in 2009 (see TEC21 41/2010). A two-year measurement campaign in the plant has now shown that it actually achieves the "plus" in energy generation. In addition, important findings were gained for further projects.
