Abstract: An element for an easily scalable thermal energy storage, distinctive in that the element includes an outer shell being a combined casting form and reinforcement, a solid thermal storage medium in the form of hardened concrete, which concrete has been cast and hardened into said outer shell. A method for building and use of the element is also disclosed.

Abstract: Thermal energy storage (“TES”) includes at least two blocks or zones operated with respect to charging and discharging of thermal energy by flowing a heat transfer fluid (“HTF”) through the block or zone; an inlet charging manifold, an outlet charging manifold, an inlet pipe arranged from the inlet charging manifold to each block or zone; an outlet from each block or zone; and one or more of the valves: a flow control valve (vi1; va1, . . . ve1) arranged in at least one of block or zone inlet pipes, inlets, outlets and outlet pipes, for control of flow through the block or zone, a bypass valve (vi2; va2, . . . ve2) arranged in inlet charging side pipe sections between inlet pipe and serial flow return for the block or zone, for bypassing flow and serial flow control.

Abstract: Thermal energy battery, comprising: an evaporator-condenser thermal energy storage (ec-TES), with an end for vapor and an end for liquid, comprising one-phase stationary material storing at least 70% of the thermal energy stored within the ec-TES, a storage tank for vapor and liquid (ST), with a vapor part at a higher elevation and a liquid part at a lower elevation, a vapor line, arranged to the vapor end of the ec-TES, for inlet and outlet of vapor, a liquid line arranged between the liquid end of the ec-TES and the liquid part of the ST, a tank vapor line arranged from the vapor part of the ST to the vapor line or the vapor end of the ec-TES, and an evaporation control valve (CV6) in the tank vapor line.

Abstract: An element for an easily scalable thermal energy storage, distinctive in that the element includes an outer shell being a combined casting form and reinforcement, a solid thermal storage medium in the form of hardened concrete, which concrete has been cast and hardened into said outer shell. A method for building and use of the element is also disclosed.

Abstract: Thermal energy battery, comprising: an evaporator-condenser thermal energy storage (ec-TES), with an end for vapor and an end for liquid, comprising one-phase stationary material storing at least 70% of the thermal energy stored within the ec-TES, a storage tank for vapor and liquid (ST), with a vapor part at a higher elevation and a liquid part at a lower elevation, a vapor line, arranged to the vapor end of the ec-TES, for inlet and outlet of vapor, a liquid line arranged between the liquid end of the ec-TES and the liquid part of the ST, a tank vapor line arranged from the vapor part of the ST to the vapor line or the vapor end of the ec-TES, and an evaporation control valve (CV6) in the tank vapor line.

Abstract: A thermal energy storage and heat exchanger includes a plurality of concrete thermal energy storage elements, a housing into which the plurality of concrete thermal energy storage elements are arranged, a heat transfer and storage medium in a volume between the plurality of concrete thermal energy storage elements and the housing, in a form of a stagnant medium or a dynamic medium. The thermal energy storage and heat exchanger further includes at least one inlet for delivery of thermal energy to the thermal energy storage, at least one outlet for taking out thermal energy from the thermal energy storage, and thermal insulation arranged into or on an inside or outside of walls, floor and roof of the housing.

Abstract: A high temperature thermal energy storage includes a foundation comprising thermal insulation, at least one self-supported cassette arranged on the foundation. At least one cassette is a self-supporting frame or assembled structure with respect to transport and installation, containing a number of concrete thermal energy storage elements, some or all of the elements include heat exchangers embedded in the concrete of the elements. A pipe system includes an inlet and an outlet for thermal input to and output from the storage, respectively. The pipe system is fluidly coupled to the heat exchangers for circulating fluid through the heat exchangers for thermal energy input to or output from the elements and thermal insulation around and on top of the at least one self-supported cassette containing concrete thermal energy storage elements.

Abstract: High temperature thermal energy storage, distinctive in that the storage comprises: a thermally insulated foundation, at least one self-supported cassette arranged on said foundation, which cassette is a self-supporting frame or structure containing a number of concrete thermal energy storage elements, some or all of said elements comprising embedded heat exchangers, a pipe system, the pipe system comprising an inlet and an outlet for thermal input to and output from the storage, respectively, and connections to said heat exchangers for circulating fluid through said heat exchangers for thermal energy input to or output from said thermal energy storage elements, and thermal insulation around and on top of the at least one self-supported cassette with concrete thermal storage elements. The invention also provides a method of building and methods of operating the storage.

Abstract: Thermal energy storage and heat exchanger, distinctive in that it comprises: a number of hardened concrete thermal energy storage elements; a housing, into which said elements have been arranged; an active heat transfer and storage medium in the volume between said elements and said housing, in the form of either: a stagnant liquid or phase change material, or a dynamic fluid arranged to flow in the volume between said elements and said housing; at least one means for delivery of thermal energy to the thermal energy storage; at least one means for taking out thermal energy from the thermal energy storage; and thermal insulation.

Abstract: The invention provides an element for an easily scalable thermal energy storage, distinctive in that the element comprises: an outer shell being a combined casting form and reinforcement, a solid thermal storage medium in the form of hardened concrete, which concrete has been cast and hardened into said outer shell. Method for building and use of the element, and thermal energy storage comprising elements of the invention.