E.ON unveils Germany’s first-of-a-kind district heating and cooling system


E.ON and partners have introduced a new low-carbon district heating and cooling service for municipalities in Germany.

The mechanism was developed in partnership with Avacon, municipal companies, the real estate industry, as well as research partners such as RWTH Aachen University for cities in the Rhine and Ruhr area.

The service has been developed as part of the “Reallabore of the Energy Transition” competition which was organised by the Federal Ministry of Economics and Energy.

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The service will help Germany to accelerate its energy transition through providing an alternative to municipalities in regions where coal energy generation has been phased out.

The technology used will be latest generation, low-temperature heat networks, like the solution ectogrid which E.ON developed in Sweden and TransUrban.

Whilst district heating networks are often operated at temperatures of more than 100 degrees Celsius, the solution only requires 10 to 40 degrees celcius.

This helps reduce energy losses and enables the integration of renewable energies such as geothermal energy or the use of waste heat.

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Waste heat generated during cooling of buildings is fed back into the energy cycle and is available elsewhere to cover the heating requirements. This turns consumers into so-called prosumers who both use and provide energy.

“Our goal is to significantly improve the carbon footprint of cities. This is not just about expanding renewable energies. We want to look at the energy supply as a whole and implement it in partnership. With our low-temperature networks we have found a way to finally bring the energy transition as a heat transition into the city,” says E.ON Board Member Karsten Wildberger.