WINZER

The fundamental restructuring of energy supply systems in Germany by 2050 is an enormous technological and economic challenge. Renewable energies and energy efficiency are therefore increasingly coming into focus. As a result, thermal energy storage systems play an important role in the increased use of renewable energies.

As part of WINZER project (dt.: “Wärmespeicherung in Zechen des Ruhrgebietes”, en.:“Heat storage in mines in the Ruhr area“), large-volume seasonal heat storage systems in mining infrastructures and the surrounding groundwater bodies will be investigated in order to develop previously unused thermal storage capacities and optimize existing installations.

The aim of the project is the development of a holistic monitoring concept, which will be carried out on an existing aquifer heat storage pilot plant in groundwater-filled mining cavities. The gained measurement data and findings will be used to make qualitative and quantitative statements on the hydrochemical, microbiological, geomechanical and groundwater-ecological properties in cyclic operation.

From this, concepts and technologies for feasibility and optimization, as well as for the safe operation of aquifer heat storage systems in former coal mines are derived.

The development of thermo-hydraulic simulations should also be used for the evaluation of future sites in order to increase the operational safety and cost-effectiveness of mine heat storage systems.

Building on these findings, the expansion of renewable energies in densely populated urban areas should be promoted.