In a current test set-up at Hamburg Bergedorf dubbed ‘future energy solution’ (FES), scientists from the TUHH Institute for Thermofluid Dynamics are converting excess wind energy into heat they store in a rock-fill that is protected with an insulated cover.

When there is a need for additional electricity, a steam turbine converts the heat energy back to power.

“The technology of our FES store deliberately uses mainly tried and trusted technology,” says Till Barmeier, Siemens’ project manager.