Our Pressurized High Temperature Thermal Energy Storage TESS 3B was developed specifically for use as a thermal power storage (Carnot battery). This enables the high temperature thermal heat storage to be discharged under pressure and the hot air to be expanded in a turbine to generate electricity. The successful discharging tests of the pressure storage with several bar overpressure and high temperatures at the same time deliver promising results and show that the storage technology works reliably even when pressurized and can be used in a Carnot battery.

Tests with a turbine are planned for the near future to demonstrate reconversion into electricity.