15 Sep 2021
by IEA DHC

Housing estate Weihenbronn in Wüstenrot, Germany

The district of Weihenbronn in Wüstenrot consists of a ring road connecting a small housing estate, the city hall building and the fire brigade building complex.

The unusual situation of having a central administrative office outside the city centre can be explained by the Baden-Württemberg municipal reform at the beginning of the 1970s. At that time, the municipalities of Finsterrot, Maienfels, Neuhütten, Neulautern and Wüstenrot merged and then moved the seat of the town hall and fire brigade to the geographical centre of the new municipality.

At the beginning of the project, a small heating network was available for the town hall and the buildings of the fire brigade, the German Red Cross building, and the building yard. The oil-fired system was to be renewed. The project partner UBP-consulting GmbH & Co. KG took over the project planning of a network extension in the nearby residential area, combined with the construction of a new biomass heating plant (Figure 76).

Figure 76_CS2.png

The network is designed for the large municipal customers with a heat demand of 515 MWh per year and the residential buildings with a total heat capacity of 80 MWh per year. The conversion from oil-fired heating to the biomass-fired district heating network is associated with an annual avoidance of 190 t of carbon dioxide emissions. Furthermore, there is capacity for additional connections.

Figure 77_CS2.png

The new heating network was put into operation in autumn 2015. The heating system consists of two biomass boilers (120 kW each) installed in a container and a solar thermal system with a surface area of 10 m² installed on the roof (Figure 76 & Figure 77). For peak load and emergency supply a buffer storage tank is placed next to the boiler room.