High-temperature heat storage device
AssigneeDeutsche Forschungsanstalt fuer Luft- und Raumfahrt e.V.
InventorStefan Weingartner
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Abstract
In order to improve a heat storage device comprising a storage container which has an inner chamber for accommodating alkali and alkaline earth compounds, in particular alkali and alkaline earth halides, and their eutectics as storage medium such that mechanical stresses no longer occur and the behavior of the heat storage device is such that its capability for receiving and discharging energy may be calculated as far as possible, it is suggested that a substantially open-pored structure consisting of a material wettable by the storage medium be arranged in the inner chamber and that the structure be soaked with the storage medium.
Claims23
Heat storage device comprising:
- a storage container of gas tight material having an inner chamber for accommodating anhydrous alkali and alkaline earth halides, and their eutectics as a storage medium in both a solid phase and a liquid phase, said storage medium being subject to substantial volume variations of up to about 30% during transitions between its solid and liquid states, and
- a substantially open-pored structure consisting of a material wettable by the storage medium arranged in the inner chamber and having an average pore size of greater than approximately 0.1 mm, wherein said structure is soaked with the storage medium and accommodates the substantial volume variations of said storage medium to prevent damage to said storage container.
Heat storage device comprising:
- a storage container of gas tight material having an inner chamber for accommodating anhydrous alkali and alkaline earth halides, and their eutectics as a storage medium in both a solid phase and a liquid phase, said storage medium being subject to substantial volume variations of up to about 30% during transitions between its solid and liquid states, and
- a substantially open-pored structure consisting of a material wettable by the storage medium arranged in the inner chamber and having an average pore size of greater than approximately 0.1 mm, wherein said structure is produced as a coherent open-pored structure having unfilled pores which is subsequently soaked with said storage medium and which accommodates the substantial volume variations of said storage medium to prevent damage to said storage container.
Heat storage device comprising:
- a storage container of gas tight material having an inner chamber for accommodating anhydrous alkali and alkaline earth compounds and their eutectics as a storage medium in both a solid phase and a liquid phase, said storage medium being subject to substantial volume variations of up to about 30% during transitions between its solid and liquid states, and a substantially open-pored structure consisting of a material wettable by the storage medium arranged in the inner chamber and having pores with an average pore size of such dimension that in its liquid phase said storage medium essentially fills said pores completely whereas in its solid phase said storage medium is deposited adjacent wall webs of said pores and forms voids or hollow spaces.
Dependencies are inferred from the claim text.