Old Neustadt in Bremen becomes a model bicycle district
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Federal Environment Ministry provides 2.4 million euros from the Climate Protection Fund
The Senator for the Environment, Building and Transport and the Bremen University of Applied Sciences jointly applied for funding in a competitive procedure in the "Federal Competition for Climate Protection in Cycling" of the National Climate Protection Initiative (NKI) for a "Bicycle Model Quarter Alte Neustadt Bremen - from bicycle street to bicycle zone". Now, after many rounds of negotiations, the funding decisions for the implementation of the bicycle model quarter have been received by the Senator for the Environment, Building and Transport (1,576,361 euros) and the Bremen University of Applied Sciences (834,835 euros).
Developer Daniel Manschke from Volterion fills the electrolyte into the battery storage units in the climate quarter of Stadtwerke Herne. Photo: Stadtwerke Herne
Violet, green, blue and yellow - inside the innovative battery storage systems now available in the Climate quarter of the municipal utility company, will be colourful in the future. The electrolyte, which can store up to ten kilowatt hours of self-produced solar power, changes color depending on the state of charge.
Each of the new storage tanks holds 500 litres of the storage liquid. Redox-flow batteries in the cellars of the seven houses. The developers of the Dortmund-based manufacturer Volterion, a spin-off of the Fraunhofer Institute UMSICHT, installed and filled them themselves in Herne. This is because the climate district is an interesting technical demonstration object for them: Up to now, they have only installed battery storage systems in large-scale projects. In the single-family homes in Sodingen, the battery is only about the size of a two-door wardrobe.
Compared to conventional rechargeable batteries Redox-flow batteries are characterized by high operational reliability and extreme durability. Even a complete discharge does not harm them.
"With the battery, our energy concept of solar system and heat pump is now complete," explains Stephan Becker, project manager at the developer Stadtwerke Herne. "The climate quarter is now entering the home stretch." The final inspection with the future residents is scheduled to take place in about two weeks.
In April of last year, the municipal utility company began construction of the seven modern plus-energy houses. The small car-free model settlement combines the latest storage technology with renewable energy generation. The supply concept varies in individual details. With scientific support, the most efficient combination is to be found after the residents have moved in.
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Neues Berlin and Berliner Stadtwerke expand cooperation
Photo: Berliner Stadtwerke/Mathias_Voelzke
Wohnungsbaugenossenschaft Neues Berlin and Berliner Stadtwerke have agreed on another joint tenant power project. Six solar power systems with an output of around 500 kilowatts are being built in the Mühlengrund housing estate in Hohenschönhausen. Tenants of more than 1,100 apartments will soon be able to benefit from green electricity from their own roofs.
The solar plants, which together cover 4,000 m², are being erected on a total of 23 six-storey buildings between Falkenberger Chaussee, Rüdickenstraße and Am Breiten Luch, near the Hohenschönhausen S-Bahn station. They will enable around 420,000 kilowatt hours of green electricity to be harvested per year and around 235 tonnes of the greenhouse gas CO2 save.
"We are very pleased that Neues Berlin has already started the third project with us, which is also quite large by Berlin standards," says Dr. Kerstin Busch, Managing Director of Berliner Stadtwerke, who points out that there is further potential for expansion in the Mühlengrund residential complex. "Although we are calling for improvements in the current EEG draft - for example, with regard to the obligation to tender or the supply of tenant electricity to neighbouring buildings - we see that tenant electricity can currently still succeed under certain conditions and in close communication with the residents and the cooperative, even under difficult conditions."
"Together with Berliner Stadtwerke GmbH, we have implemented environmentally friendly supply projects based on renewable energies on our roofs in a very short time and without much effort. We are looking forward to further projects like the one in Mühlengrund to give even more tenants the opportunity to benefit from tenant electricity. During the cooperation, it quickly became apparent that both sides are pursuing the goal of making an ecological and social contribution to our city with the greatest interest," says Thomas Fleck, member of the board at Neues Berlin.
In 2019, Berliner Stadtwerke and the housing cooperative Wohnungsbaugenossenschaft Neues Berlin have already successfully implemented a tenant electricity project in the residential complex Malchow floodplain in Hohenschönhausen. Since then, around 640 households have been able to obtain cheap green electricity from their own roofs. To this end, a total of five solar power systems with a total capacity of 224 kilowatts were installed on four buildings belonging to the cooperative. This year, Berliner Stadtwerke added an existing solar power system on the Neues Berlin building Degnerbogen converted to an intelligent tenant power system - a smart model for owners of PV systems that will fall out of the EEG subsidy in the future.
For Berliner Stadtwerke, the implementation of local green electricity projects is an important milestone in enabling a climate-friendly and affordable supply for all residents. To this end, solar power systems are being installed in residential areas and on public buildings, among other things, in order to generate clean electricity where it can be consumed. In addition to this local system expansion, Berliner Stadtwerke offers a range of solar energy services with its berlinStrom tariff municipal green electricity throughout the city. Today, Berlin's only public energy supplier counts more than 19,000 green electricity households among its environmentally conscious customer base.
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