Review: Cluster forum "The building as an energy system - energetic retrofitting of the building stock".

08/04/2023

On 25.07.2023, the Cluster Forum "The building as an energy system - energetic retrofitting of existing buildings" took place at the Energy Campus Nuremberg.

In exciting expert presentations, the potentials and possibilities of retrofitting existing buildings were discussed. The tour of the laboratories of the Energy Campus Nuremberg provided additional practical relevance.

After the welcome by our host, Mr. Markus Rützel, Managing Director of the Energy Campus Nuremberg, Ms. Ines Eichmüller tuned into the topic of the event. The sub-project manager for building transformation in the project "Klimapakt2030plus - Energiewende in der Metropolregion Nürnberg" took a look into the future. The implementation of climate policy goals is pressing and precludes the future use of fossil fuels. Nevertheless, Ms. Eichmüller sees the building transformation as a great opportunity for the future: "When I think about the energetic refurbishment in existing buildings, I see two great advantages: You save energy and you create a comfortable home. A building with more living comfort, with pleasant temperatures in summer as well as in winter, with little manual effort for heating, ventilation and cooling and that also with a long-term better economy - that's brilliant!"

An outlook on the possible options for heat supply in existing buildings was given by Konstantin Metzger. Mr. Metzger is a research associate and project engineer at the Forschungsstelle für Energiewirtschaft mbH. He contrasted various heat generation technologies and addressed myths and facts surrounding heat pumps. The participants also gained an insight into the "Bayernplan Energie 2040" project, in which four scenarios were used to examine how the path to this goal could look. What could the heat supply in the building sector look like in the future? Mr. Metzger presented some of the results of the study. More information on the project can be found here: https://www.ffe.de/projekte/bayernplan-energie-2040/

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Mr. Thomas Kirner - founder and managing director of smart cube 360 GmbH - explains: "With our modular heat pump and ventilation concepts, we want to shorten the installation time of the technology and decouple individual work steps in terms of time. We are building the bridge between manufacturers and tradesmen in order to jointly achieve the climate policy expansion targets and drive forward the energy turnaround."

"Concrete can go from being a climate sinner to an efficient heat accumulator," said Erwin Aurbacher, head of the technical office of Klima Top GmbH, in his presentation. Mr. Aurbacher demonstrated the technical possibility of making concrete ceilings usable as heat accumulators with the help of climate ceilings. This enables component activation in existing buildings.

Mr. Daniel Lassahn - Managing Director of alitiq GmbH - spoke about AI-based optimization of heat supply with heat pumps. With the aim of cost, resource and emission efficiency, process and weather data are collected, structured and analyzed. Based on this data, relevant information is derived and economically optimal schedules are created for heat pump operation at predicted heat demand.

The MAGGIE project is a good-practice example of socially responsible renovation in existing housing. Ms. Miriam Vetter, research associate at the Institute for Social Research and Technology Assessment at OTH Regensburg, presented the project. The aim of the project was to modernize the energy efficiency of the Margaretenau cooperative housing district in Regensburg with the involvement of the cooperative members. "When refurbishing existing buildings to make them more energy-efficient, it is important to create acceptance among residents for the refurbishment measures. If the users reject the modernization measures, this may well lead to a change in tenancy and thus to a change in energy-related user behavior. Refurbishment measures based on the original user behavior could thus, in the worst case, no longer be targeted and efficient. " explains Ms. Vetter.

In the last lecture, Mr. Christian Winterhalter - Climate Protection Officer in the Department for Environment and Health at the City of Nuremberg - devoted himself to the current funding and credit opportunities in the field of energy-related renovation of existing buildings. He gave an overview of the current funding programs and addressed, among other things, the federal funding for Efficient Buildings as well as some local funding programs.

As part of the events, Professor Dr. Barbara Hintz provided an exclusive insight into the laboratories of the Nuremberg Energy Campus. Together with her team, Prof. Dr. Hintz guided the participants through the premises and presented current research results, including 3D printing with clay and new materials for building construction and insulation.