Abstract: Provided is an arrangement for storing heat energy and in particular providing electric energy from heat energy, the arrangement including: a storage for storing heat energy having a charging inlet and a charging outlet; a tank for holding water for a steam generator, in particular heat recovery steam generator, the tank having an inlet and an outlet, a storage-steam-generator pipe between the charging outlet of the storage and the inlet of a heat recover steam generator; a storage-steam-generator valve within the storage-steam-generator pipe, in particular within a first portion of the storage-steam-generator pipe allowing to temporarily open the storage-steam-generator pipe.

Abstract: Provided is a thermal energy storage device including a passage for the circulation of a heat transporting fluid between a hot end and a cold end, the hot end being configured for storing thermal energy at a first temperature (T1), the cold end being configured for storing thermal energy at a second temperature lower than the first temperature (T1). The thermal energy storage device includes a heating device at the hot end.

Abstract: A heat reservoir including a housing, first reservoir elements for storing thermal energy, and an inlet port is provided. The first reservoir elements are arranged in the housing. The inlet port is coupled to the housing in such a way that a working fluid can flow into the housing through the inlet port. The inlet port is provided with an inlet orifice through which the working fluid can flow from the surroundings of the heat reservoir into the inlet port. The inlet port includes a diffusor portion the cross-section of which increases in the direction running from the inlet orifice to the housing.

Abstract: A heat exchange system with at least two heat exchange chambers is provided. Each of the heat exchange chambers includes heat exchange chamber boundaries which surround at least one heat exchange chamber interior of the heat exchange chamber. The heat exchange chamber boundaries include at least one first opening for guiding in of an inflow of at least one heat transfer fluid into the heat exchange chamber interior and at least one second opening for guiding out of 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 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 charging system with a least one high temperature thermal energy exchange system is provided. The high temperature thermal energy exchange system includes at least one heat exchange chamber with chamber boundaries which surround at least one chamber interior of the heat exchange chamber, wherein the chamber boundaries include at least one inlet opening for guiding in an inflow of at least one heat transfer fluid into the chamber interior and at least one outlet opening for guiding out an outflow of the heat transfer fluid out of the 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 method for operating a heat exchange system is provided. The heat exchange system includes 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, wherein the heat exchange chamber boundaries comprise 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 thermal energy storage plant is provided including a charging circuit and a discharging circuit, the charging circuit including: a first fluid transporting machine for generating a flow of a working fluid in the charging circuit, a heating device for transferring heat to the working fluid, a main heat accumulator for storing the thermal energy of the working fluid, the discharging circuit including the main heat accumulator, a heat exchanger included in a thermal cycle for transforming the thermal energy stored into mechanical power, the thermal energy storage plant further comprising a secondary heat accumulator including a first end connected to the charging circuit, downstream the heating device, a second end connected to the discharging circuit, upstream the heat exchanger.

Abstract: Provided is a thermal energy storage plant including a charging circuit where a first working fluid is circulated, the charging circuit includes a first fluid transporting machine for generating a flow of the first working fluid in charging circuit, a heating device electrically powered for transferring heat to the first working fluid, a heat accumulator for storing the thermal energy of the first working fluid, the heat accumulator including a hot end for receiving the first working fluid at a first temperature and a cold end for letting the first working fluid exit the heat accumulator at a second temperature lower than the first temperature, the heat accumulator includes a plurality of heat storage units connected in series between the hot end and the cold end, which may be separated by valves.

Abstract: A thermal energy storage is provided comprising a housing, a thermal energy storage structure arranged within the housing, the thermal energy storage structure comprising thermal energy storage elements and a plurality of dividing elements, the plurality of dividing elements being arranged such that the thermal energy storage elements are divided into a plurality of layers, a fluid inlet, the fluid inlet being in fluid communication with the housing and adapted to receive a working fluid and provide a flow of working fluid towards the housing, and a convection reducing structure arranged adjacent the thermal energy storage structure at a side of the thermal energy storage structure that faces the fluid inlet. Furthermore, a method of storing thermal energy and a steam power plant for producing electrical energy are described.

Abstract: A power plant with at least one steam cycle and with at least one high temperature thermal energy (heat) exchange system is provided. The high temperature thermal energy exchange system includes at least one heat exchange chamber with chamber boundaries which surround at least one heat exchange chamber interior of the heat exchange chamber. The chamber boundaries include at least one inlet opening for guiding in an inflow of at least one heat transfer fluid into the heat exchange chamber interior and at least one outlet 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 two heat exchange chambers is provided. Each of the heat exchange chambers includes heat exchange chamber boundaries which surround at least one heat exchange chamber interior of the heat exchange chamber. The heat exchange chamber boundaries include at least one first opening for guiding in of an inflow of at least one heat transfer fluid into the heat exchange chamber interior and at least one second opening for guiding out of 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 flow through the chamber interior can be adjusted individually.

Abstract: Provided is a thermal energy storage plant including a charging circuit where a first working fluid is circulated, the charging circuit includes a first fluid transporting machine for generating a flow of the first working fluid in charging circuit, a heating device electrically powered for transferring heat to the first working fluid, a heat accumulator for storing the thermal energy of the first working fluid, the heat accumulator including a hot end for receiving the first working fluid at a first temperature and a cold end for letting the first working fluid exit the heat accumulator at a second temperature lower than the first temperature, the heat accumulator includes a plurality of heat storage units connected in series between the hot end and the cold end, which may be separated by valves.

Abstract: A power plant with at least one steam cycle and with at least one high temperature thermal energy (heat) exchange system is provided. The high temperature thermal energy exchange system includes at least one heat exchange chamber with chamber boundaries which surround at least one heat exchange chamber interior of the heat exchange chamber. The chamber boundaries include at least one inlet opening for guiding in an inflow of at least one heat transfer fluid into the heat exchange chamber interior and at least one outlet 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 thermal energy storage is provided comprising a housing, a thermal energy storage structure arranged within the housing, the thermal energy storage structure comprising thermal energy storage elements and a plurality of dividing elements, the plurality of dividing elements being arranged such that the thermal energy storage elements are divided into a plurality of layers, a fluid inlet, the fluid inlet being in fluid communication with the housing and adapted to receive a working fluid and provide a flow of working fluid towards the housing, and a convection reducing structure arranged adjacent the thermal energy storage structure at a side of the thermal energy storage structure that faces the fluid inlet. Furthermore, a method of storing thermal energy and a steam power plant for producing electrical energy are described.

Abstract: A heat reservoir including a housing, first reservoir elements for storing thermal energy, and an inlet port is provided. The first reservoir elements are arranged in the housing. The inlet port is coupled to the housing in such a way that a working fluid can flow into the housing through the inlet port. The inlet port is provided with an inlet orifice through which the working fluid can flow from the surroundings of the heat reservoir into the inlet port. The inlet port includes a diffusor portion the cross-section of which increases in the direction running from the inlet orifice to the housing.