21107 Hamburg-Wilhelmsburg: The former flak bunker in Wilhelmsburg has become a symbol of the climate protection concept Renewable Wilhelmsburg. The monument, which has been virtually unused since the end of the war, was refurbished as part of the IBA Hamburg and converted into a renewable power plant with large-scale heat storage. The energy storage facility has a volume of 2,000 cubic metres, which corresponds to 2,000,000 litres. It supplies the 120-hectare Reiherstieg district with climate-friendly heat and feeds renewable electricity into the Hamburg distribution grid.
| The large-scale buffer storage is the central innovation of the project. It is fed by the heat from a biomethane-fired combined heat and power plant (CHP), a wood combustion plant and a solar thermal plant, as well as from the waste heat of an industrial company. Due to the buffer effect of the storage tank, a strong reduction of the thermal generation capacity to be installed from 11 to 6.5 megawatts is achieved and the economic use of renewable energies within the heat supply concept is made possible.
In the future, surplus wind power from northern Germany could be converted into heat in the storage facility (power to heat) or, during periods of low wind and low sun, heat from an additional combined heat and power plant could be fed in, which would then be used to generate electricity. From 2021, the concept through the involvement of the Deep geothermal energy expanded. Hamburg Energie plans to pump 130-degree water at a depth of up to 3.5 kilometres. This will provide ten to 14 megawatts of heat. A twelve-kilometre network of pipes will distribute the heat to the neighbourhoods around the energy bunker and the environmental authority, as well as to the new neighbourhoods on the route of the relocated Reichsstraße. From 2023/2024, up to 5,000 flats with 20,000 residents are to be connected. The federal government is funding the project, worth a total of 76 million euros, with 23 million euros as a "real laboratory for the energy transition". The real laboratory is intended to demonstrate how a CO2-free energy supply can be organised for small towns. In addition to deep geothermal energy, other storage facilities are being built to compensate for fluctuations in demand. |
Key data
Built: 1943
Blasting inside: 1947
Start of the conversion: 2010
Completion: 2013
Size
Floor space: 57 x 57 m
Height: 42 m
Exhibition with café: 880 sqm + 540 sqm
Energy centre: 5,625 sqm
Solar panel façade:
approx. 1,350 sqm (roof); 750 kW; 600 MWh/a
Photovoltaics: approx. 670 sqm (south side); 100 kWp; 90 MWh/a
Heat storage: 2,000 cbm
Total output
Heat: 22,400 MWh - enough for 3,000 households
Electricity: 2,850 MWh - enough for 1,000 households
External links
Contribution of 25. 2. 2021: https://taz.de/Erdwaerme-Bohrungen-in-Hamburg/!5750480/
www.hhs.ag/projekte.html?projekt=energiebunker&typologie=
www.iba-hamburg.de/projekte/energiebunker/projekt/energiebunker.html
Last Updated: 16 May 2021
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All project/s of the planning office: Manfred Hegger; Urban region: Hamburg and surrounding area; Country: GermanyCharacteristics: ; Typology: Building; Thematic: Building Exhibition, Photovoltaics, IBA Wilhelmsburg, Local heating, Solar local heating with seasonal storage, Water reservoir, Heat accumulator
