185 participants attended the online-seminar “A Contribution to the Heat Transition – Low Temperature and Renewable Energies in the Heating Network” in the framework of the German LowTEMP 2.0 training seminars. Jan Gerbitz, ZEBAU GmbH, explained the overall connection between lowering system temperatures in the heating network and integrating renewable heat sources. He outlined how the educational modules that are being developed in LowTEMP 2.0 contribute to capacity building in the district heating sector and which materials will be publicly available at the end of the year. Subsequently, three lectures provided insights into the practical implementation of 4th generation district heating networks in Germany.

Mechthild Zumbusch, Head of Consulting at Berlin Energie Agency, presented the “Insights from neighbourhood projects – low temperature networks and renewable energy supply”. In addition to explaining the advantages and challenges of low-temperature heating networks, she presented projects in Berlin and funding opportunities for heating networks.

Prof. Dr.-Ing. Clemens Felsmann, Chair of Building Energy Technology and Heat Supply, Dresden University of Technology, described the experiences in the low-temperature network and the feed-in of solar heat at “Wohnen am Campus”, a new development area in Berlin. In this project, customers were encouraged to generate heat themselves with renewable energy and feed surpluses into the heating network.

Carsten Palkowski, Energy and Communication Technology, Real Estate, Infrastructure & Digitalisation, TEGEL PROJEKT GMBH and Michael Behrman, Green Urban Energy presented the project Berlin TXL: Plans for a Low-Exergy Grid with Decentralised Energy Marketplace. The energy concept for the former Tegel airport site aims to integrate new technologies for heat provision into the 12 km long low-exergy grid in the future. A learning system that uses an energy hub to turn customers into energy suppliers themselves.