Thermal energy storage and recovery device and system having a heat exchanger arrangement using a compressed gas

A thermal energy storage and recovery device comprising:

• a heat exchanger arrangement, which is configured for guiding a flow of a heat transfer medium between a first end of the heat exchanger arrangement and a second end of the heat exchanger arrangement, and
• a heat storage material, which surrounds the heat exchanger arrangement in such a manner that a thermal interaction region is formed for thermally coupling the heat transfer medium with the heat storage material,
• wherein the heat exchanger arrangement is sealed against the heat storage material in such a manner that, when the thermal energy storage and recovery device is in a first operational mode, in which the heat storage material is to receive thermal energy from the heat transfer medium, compressed gas, which has been heated up by a gas compression, is usable as the heat transfer medium for transferring thermal energy from the heat transfer medium to the heat storage material;
• and wherein the heat exchanger arrangement includes:
• a first heat exchange section being associated with the first end,
• a second heat exchange section being associated with the second end,
• a first connecting section connecting the first heat exchange section with the second heat exchange section and
• a second connecting section connecting the first heat exchange section with the second heat exchange section parallel to the first connecting section,
• wherein at least one of the connecting sections comprises a valve for controlling the flow of the heat transfer medium through the respective connecting section.