A method to use high temperature thermal storage for integration into building heating/cooling systems and to meet building's peak power demand. The method can be used to store the thermal energy at any desirable rate and then discharge this stored energy to meet the demand for short or long time intervals. Input energy stored with this method is thermal energy, however, output can be thermal or electric based upon the requirement.

A sintered material exhibiting the following chemical composition, as percentages by weight: iron oxide(s), expressed in the Fe.sub.2O.sub.3 form, 85%, CaO: 0.1%-6%, SiO.sub.2: 0.1%-6%, 0.05% TiO.sub.2, 0Al.sub.2O.sub.3, TiO.sub.2+Al.sub.2O.sub.33%, and constituents other than iron oxides, CaO, SiO.sub.2, TiO.sub.2 and Al.sub.2O.sub.3: 5%. The CaO/SiO.sub.2 ratio by weight is between 0.2 and 7. The TiO.sub.2/CaO ratio by weight is between 0.2 and 1.5.

A pumped heat energy storage system is provided. The pumped heat energy storage system may include a charging assembly configured to compress a working fluid and generate thermal energy. The pumped heat energy storage system may also include a thermal storage assembly operably coupled with the charging assembly and configured to store the thermal energy generated from the charging assembly. The pumped heat energy storage system may further include a discharging assembly operably coupled with the thermal storage assembly and configured to extract the thermal energy from the thermal storage assembly and convert the thermal energy to electrical energy.

The invention relates to a container (200) for a heat storage and restitution system, comprising a vessel in which a gas is circulating in order to be cooled or heated. The vessel is limited by a first jacket formed from concrete (203) surrounded by a thermally insulating layer (206), which is itself surrounded by a steel shell (204). The vessel comprises at least two modules (210), each comprising a double wall formed from concrete and a perforated base (205) limiting at least two volumes (217 and 216) which are each capable of containing a fixed bed of particles of a material for storage and restitution of heat (207). The modules are disposed one above the other in a centered manner such that the double wall formed from concrete forms the first jacket formed from concrete (203) and a second jacket formed from concrete (215).

A heat sink vessel is disclosed herein. The heat sink vessel includes a body and one or more heating media. The body defines an inner volume. The body includes an upper portion, a middle portion, and a lower portion. The upper portion has a conical entrance for incoming flow of fluid. The middle portion has a first side and a second side. The middle portion interfaces with the upper portion of the first side. The lower portion interfaces with the middle portion on the second side. The lower portion includes an inverted perforated conical liner and a perforated plate. The inverted perforated conical liner and the perforated plate control the flow of fluid exiting the vessel. The one or more heating media is disposed in the inner volume. The one or more heating media is configured to store heat during processing.

A device for storing heat energy/cold energy, including a container having a wall (102) with a first interface (110) suitable for letting a fluid into the device (100) and a second interface (111) suitable for letting the fluid out of the device (100), with a plurality of storage elements (104) being arranged in the container and configured to store heat energy/cold energy supplied by the fluid. The container has at least one perforated internal wall (105) with openings of dimensions smaller than the dimensions of the storage elements (104) and defining a first compartment (13.sub.1) and at least one second compartment (13.sub.2) in the container, with the plurality of storage elements (104) being distributed in the first compartment (13.sub.1) and in said at least one second compartment (13.sub.2).

A heat store for storing at least 100 MWh of thermal energy of a relatively warmer gas in a charging state and for giving off thermal energy to a relatively colder gas in a discharging state is provided. In the charging state, the heat store has at least one inflow surface, provided with inflow openings, for introducing the gas, and at least one outflow surface, provided with outflow openings, for discharging the gas after giving off heat to a granular heat storage medium, wherein the inflow surface is formed at least in certain portions into a channel which is surrounded, in particular completely, by the outflow surface, and wherein an intermediate space in which the granular heat storage medium is arranged is defined between the inflow surface and the outflow surface.

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.

Some embodiments are directed to a hybrid combustion turbine power generation system, which includes a gas turbine integrated with an ACAES via fluid connection(s) between the compressor and turbine , to allow air to be extracted from, and injected into, the gas turbine, the ACAES including a direct TES and compressed air store , a top-up compressor being disposed between the fluid connection(s) and the direct TES and fluidly connected so that its inlet receives air extracted from the gas turbine in an extraction mode and its outlet sends air at a higher temperature and pressure towards the downstream direct TES , thereby optimising the temperature at which returning air is injected into the gas turbine in an injection mode. This may extend the operational power range of the gas turbine and address changes in the gas turbine operating conditions between injection and bleed modes.

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.