Renewable heat storage and supply solutions

12. Nov 2019

EE.SH and partner organizations present warm water tanks, geothermical storage and more innovations for the "Energiewende"

Schleswig-Holstein covers a 150 % of its electricity consumption from renewable sources. On the other hand, only 14 % of the demand of warmth come from renewables, mostly from solar heat and bioenergy.

At a workshop on sector coupling organized by the Schleswig Holstein Renewable Energy Network Agency EE.SH and regional research and economic development companies, innovations on the field of renewable heat supply contributing to the “Energiewende” were presented.

A steel tank is a very simple solution to store warm water on a scale from 500 to 6000 cubical meters. A floating lid allows flexibility without loss of energy. Warm water can store energy peaks produced by wind or solar energy and serve as a buffer in district heating systems. The project presented is run by Prof. Dr. Thorsten Urbaneck from Chemnitz technical University (Germany, Federal State of Sachsen) and the tank manufacturer Fechtelkord & Eggersmann GmbH from Nortorf (Schleswig-Holstein):

Subterranean heat storage solutions are more adapted to urban conditions. Prof. Dr. Sebastian Bauer, Prof. Andreas Dahmke and their team from Christian Albrecht‘s University of Kiel (Schleswig-Holstein) are doing research on heat storage in geological layers, subterranean waterbeds and in concrete that may be integrated in building foundations. The picture shows a figure from Prof. Bauer’s presentation.

Prof. Dr. Ute Urban from Lübeck Technical University (Schleswig-Holstein) and Falko Ender from the Lübeck sewage water untility EBL presented the potential of energy regained from sewage water. In the city of Lübeck, recuperative heat exchangers were installed as the sewage channels of a town district had to be renewed. The surrounding houses are supplied with warmth from these heat exchanging devices.

The company get|2|energy from Kiel developed an innovative process for producing fuel pellets from grass cut. The grass is taken from roadsides or other areas due to regular mowing, so their biomass-based heating concepts do not consume resources from the food sector.


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