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.
How can Bonn become climate neutral by 2035? This is the question that the participatory project "Bonn4Future - We for the Climate!" would like to discuss together with Bonn citizens over the next two years. Since mid-2019, the climate emergency has been in effect in Bonn; in November 2019, the Council decided that Bonn should become climate neutral by 2035. The city and the non-profit association Bonn im Wandel have now signed a cooperation agreement and thus launched "Bonn4Future".
Very important in "Bonn4Future" is a new culture of mutual listening and good cooperation. All those involved are looking for solutions on how climate neutrality can succeed for our city. Everyone takes responsibility and makes their contribution.
"In order to achieve climate neutrality in Bonn by 2035, it is not only a question of setting the right course at international and national level, but also of all of us here on site," says Mayor Katia Dörner. "On politics, administration, companies and the people of Bonn with their ideas and decisions. We want to enter into dialogue with them in the participatory process 'Bonn4Future', because only in this way can this great transformation process for Bonn succeed. I am very much looking forward to working with Bonn in transition and our committed urban society!"
Project modules: Developing and implementing measures
At Climate Day - which will be scheduled and planned depending on the pandemic situation - citizens are invited to develop a joint climate vision and action plan for a climate-neutral Bonn. The ideas and findings from this Climate Day will flow into a total of four planned Climate Forums - The first is to take place in the first half of 2021. There, 100 randomly selected citizens will work together with experts from business, science, associations, culture, administration and politics to develop strategies and concrete proposals for the path to climate neutrality in 2035.
Results and ideas from the forums are reflected in the administration and in politics. They serve as orientation and support for the further development of the already existing catalogues of climate protection measures.
An Project Advisory Board and an accompanying scientific evaluation ensure a high quality of the participation process.
"Climate change is on people's minds in Bonn, we notice that every day in our work," says Dr. Gesa Maschkowski, board member of the Bonn in Transition association. "Many people want to do something and want effective measures. Now we bring them together. The citizens, people from business, science, culture and the social sector as well as politicians from all parties. Because we have to plan and act now if Bonn is to be climate neutral by 2035 at the latest."
The broadest possible participation should produce constructive ideas and results over the next two years. To kick off the process, citizens can already express their views today at the urban portalwww.bonn-macht-mit.de inform about the process and contribute their ideas on how to make the process work well.
Reaching the goal together
"Bonn4Future - Wir fürs Klima!" already received a lot of support from more than 50 Bonn initiatives before the official start of the project. However, it is important to the creators to bring people from all areas of the citizenry on board. The process is to be supported by all social groups.
An accompanying Communication and education concept is dedicated to building up a communication network. In this way, multipliers are won over and care is taken to ensure that "Bonn4Future" remains a topic of conversation and that many people are motivated to participate.
An important communication tool is also the city-wide, interactive Sustainability platform. It will make visible initiatives, activities and dates on the topic of climate-neutral city, commitment to sustainability and citizen participation in the context of the Sustainable Development Goals (SDGs).
Background
The cooperation agreement that has now been concluded was preceded by a citizens' application for participation in achieving the goal of climate neutrality. Bonn in Transition and the Climate Watch Bonn introduced this at the beginning of the year. In the meantime, the participation concept is supported by about 50 initiatives, companies and organisations. The citizens' committee agreed to it. Bonn im Wandel then developed a concept for the multi-stage procedure with the support of experts for citizen participation and further developed it in cooperation with the city administration.
With a resolution in September 2020, the Council of the City of Bonn finally commissioned the administration to conclude a cooperation agreement with Bonn im Wandel for the coordination and implementation of the two-year process. Funds of up to 719,000 euros will be made available for this until the end of 2022. The project will be implemented in the "Bonn4Future" project office. Here, four experienced experts for communication and participation work on 2.4 positions, supported by the Bonn in Change core team. On the part of the city administration the project is coordinated and accompanied by a half position. There is also a close connection to the citizen participation portal "Bonn macht mit". The participation portal bundles all information on participation offerings of the city of Bonn and provides opportunities for direct participation.
Bonn im Wandel sees itself as an ideas and project laboratory for a sustainable city. The association brings a large network as well as nine years of experience in the initiation and organization of civil society projects and change processes into the process.
Min. 4:36; Video from 18.02.2020; Ed.: MWSP Mannheim
Mannheim's conversion is green - this is demonstrated by the work of the municipal development company MWSP on the TURLEY, TAYLOR, FRANKLIN and SPINELLI sites.
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