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The new energy concept included use of renewable energy for invisible frost and ice inhibitors, and the integration of Uponor thermally active building structures for basement areas. The idea to use renewable energy from the waste heat of wheat beer production is directly in line with the vision of the artist Hundertwasser for resource-saving energy use. As an attraction, the structure offers visitors a unique view from a height of 30 metres, which is reached by a sweeping open staircase.
To guarantee safe ascent throughout the year, it was necessary to keep the steps free of snow and ice. To meet these demands, Uponor ice inhibitors were installed in the existing open step surfaces and on the viewing platform in the 22 to 30 metre height range. 20 mm x 2.3 mm chemically cross-linked polyethylene pipes produced according to the Engel method (PE-Xa) were used, with a medium flow of 45°C and return of 40°C in cold winters to ensure year-round safe and ice-free accessibility. The pipes were installed together with the construction steel.
The surface was laid on the lowermost reinforcement layer. The PE-Xa pipes used for this project were then fixed into the uppermost reinforcement layer to avoid any performance loss by ensuring the heat is as near to the surface as possible. Finally, the step elements ready-cast at ground level were brought into position using a hoisting crane. Pleasant heat is provided even in the basement level by Uponor Contec thermally active building structures. Waste heat from the wheat beer production and brewery cooling is also used here. To efficiently use this waste heat to heat the approximately 300 m² area, it is necessary to be able to feed energy into the system at the moment it becomes available.
“In our overall energy management concept, it made sense to use the 80 cm thick floor slabs of the Kuchlbauer Tower as a heat store”, said Robert Göttfried. The round floor slabs in the basement of the tower meant that the standard Contec modules needed to be adjusted by the system manufacturer into a corresponding circular form. The floor slabs were thus converted into thermally active heat buffers. The Kuchlbauer Tower is supplied with the heating medium via an underground pipe at a feed temperature of 35°C and return of 30°C.
If any demand spikes occur, the steam boiler system in the brewery may also be activated. Based on the heat store capacity of the thermally active floor slabs, the energy distribution for the system as a whole is as follows: Of the 50 kW total heating power of the Kuchlbauer Tower waste heat recovery system, around 20 kW is used to heat the basement and, depending on the ambient temperature, 15 kW to 45 kW is used to inhibit ice on the complex staircase and viewing platform.
Hundertwasser Abensberg 93326 Abensberg
Brauerei zum Kuchelbauer, Leonhard Salleck
Brauerei zum Kuchelbauer Römerstr. 5 - 9 93326 Abensberg