Abstract: Provided is a method for configuring a thermal energy storage system including the following steps: providing a thermal energy storage device for storing heat, providing a plurality of temperature sensors at different locations of the thermal energy storage device for measuring temperatures at the different locations, providing a control device of the thermal energy storage system for reading measurement data of the plurality of temperature sensors, generating a numerical model for at least one first temperature sensor of the plurality of temperature sensors based on the measured temperatures of the plurality of temperature sensors means of machine learning, and storing the numerical model by a control device, for configuring the thermal energy storage system, Furthermore, a thermal energy storage system and a method for operating a thermal energy storage system is also provided.

Abstract: Provided is a thermal energy storage including a housing having a fluid inlet and a fluid outlet, and a thermal energy storage structure arranged within the housing between the fluid inlet and the fluid outlet, the thermal energy storage structure including thermal energy storage elements and flexible separator elements, the flexible separator elements being arranged such that the thermal energy storage elements are separated into layers, each layer forming a channel between the fluid inlet and the fluid outlet. Furthermore, a method of manufacturing a thermal energy storage and a power plant for producing electrical energy is provided.

Abstract: An arrangement for receiving and/or releasing, in particular storing, thermal energy, including: a container for holding storage material, the container having a first fluid port and a second fluid port for allowing inflow and outflow of fluid flowing through the container in a substantially horizontal flow direction for charging and/or discharging the storage material; at least two first valves at different vertical positions for the first fluid port; at least two second valves at different vertical positions for the second fluid port; and at least two temperature sensors arranged within the container at different vertical positions, in particular in one plane perpendicular to the flow direction.

Abstract: Provided is a heat accumulator including a heat exchange chamber having a lower portion and an upper portion and being configured to accommodate therein heat storage elements for storing thermal energy, wherein the heat exchange chamber includes an inlet which is configured to supply a working fluid into the heat exchange chamber. A passively controlled first pressure loss regulating device is arranged within the flow of the working fluid in the heat exchange chamber and configured to pass the working fluid through, wherein the first pressure loss regulating device is configured to form a first flow resistance for a flow of the working fluid in the first pressure loss regulating device being different to a flow resistance for a flow of the working fluid in the heat exchange chamber adjacent and outside the first pressure loss regulating device.

Abstract: A heat exchange system with at least one heat exchange chamber with heat exchange chamber boundaries which surround at least one heat exchange chamber interior of the heat exchange chamber is provided. The heat exchange chamber boundaries include at least one first opening for guiding in an inflow of at least one heat transfer fluid into the heat exchange chamber interior and at least one second opening for guiding out an outflow of the heat transfer fluid out of the heat exchange chamber interior. At least one heat storage material is arranged in the heat exchange chamber interior such that a heat exchange flow of the heat transfer fluid through the heat exchange chamber interior causes a heat exchange between the heat storage material and the heat transfer fluid.

Abstract: A heat exchange system with at least one horizontal heat exchange chamber with heat exchange chamber boundaries which surround at least one heat exchange chamber interior of the heat exchange chamber is provided. The heat exchange chamber boundaries include at least one first opening for guiding in an inflow of at least one heat transfer fluid into the heat exchange chamber interior and at least one second opening for guiding out an outflow of the heat transfer fluid out of the heat exchange chamber interior. At least one heat storage material is arranged in the heat exchange chamber interior such that a heat exchange flow of the heat transfer fluid through the heat exchange chamber interior causes a heat exchange between the heat storage material and the heat transfer fluid. The heat exchange chamber is located at a soil area of a soil.

Abstract: A heat exchange system with at least one heat exchange chamber with heat exchange chamber boundaries which surround at least one heat exchange chamber interior of the heat exchange chamber is provided. The heat exchange chamber boundaries include at least one first opening for guiding in an inflow of at least one heat transfer fluid into the heat exchange chamber interior and at least one second opening for guiding out an outflow of the heat transfer fluid out of the heat exchange chamber interior. At least one heat storage material is arranged in the heat exchange chamber interior such that a heat exchange flow of the heat transfer fluid through the heat exchange chamber interior causes a heat exchange between the heat storage material and the heat transfer fluid.

Abstract: A heat exchange system with at least one horizontal heat exchange chamber with heat exchange chamber boundaries which surround at least one heat exchange chamber interior of the heat exchange chamber is provided. The heat exchange chamber boundaries include at least one first opening for guiding in an inflow of at least one heat transfer fluid into the heat exchange chamber interior and at least one second opening for guiding out an outflow of the heat transfer fluid out of the heat exchange chamber interior. At least one heat storage material is arranged in the heat exchange chamber interior such that a heat exchange flow of the heat transfer fluid through the heat exchange chamber interior causes a heat exchange between the heat storage material and the heat transfer fluid. The heat exchange chamber is located at a soil area of a soil.