System and method for energy storage
AssigneeSaltx Technology AB
InventorsLars Croon, Corey Blackman
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Abstract
There is provided a system for energy storage comprising: a fluidized bed apparatus with an energy storage material, wherein the energy storage material is provided in volumes coated with an outer layer of solid particles of a different material, wherein the volumes have a largest size in the interval 1-1000 μm and wherein the solid particles (5) have a largest size in the interval 1-500 nm. Advantages of the system include that structural changes in the energy storage material over time are minimized so that the energy storage material can be used over many cycles without any noticeable impairment. The heat transfer to and from the energy storage material is improved. The system can further be used for CO2 capture.
Claims19
A system for energy storage comprising:
- a fluidized bed apparatus with an energy storage material, wherein the energy storage material is provided in volumes coated with an outer layer of solid particles of a different material, wherein the volumes have a largest size in the interval 1-1000 μm and wherein the solid particles have a largest size in the interval 1-500 nm, and
- wherein the energy storage material comprises at least one selected from a salt, CaO, Ca(OH)2, CaCO3, MgO, Mg(OH)2, MgCO3, and metal hydrides,
- wherein the salt is selected from the group consisting of chlorides, bromides, carbonates and nitrates of lithium, magnesium, calcium, nickel, iron, zinc, manganese, and potassium, as well as hydroxides of lithium, sodium, and potassium.
A method for storing energy comprising the steps of:
- providing at least partially uncharged energy storage material in a fluidized bed apparatus, and
- transferring heat to the energy storage material in the fluidized bed apparatus to charge the energy storage material,
- wherein the energy storage material is provided in volumes coated with an outer layer of solid particles of a different material, wherein the volumes have a largest size in the interval 1-1000 μm, and wherein the solid particles have a largest size in the interval 1-500 nm,
- and wherein the energy storage material comprises at least one selected from a salt, CaO, Ca(OH)2, CaCO3, MgO, Mg(OH)2, MgCO3, and metal hydrides,
- wherein the salt is selected from the group consisting of chlorides, bromides, carbonates and nitrates of lithium, magnesium, calcium, nickel, iron, zinc, manganese, and potassium, as well as hydroxides of lithium, sodium and potassium.
A method for releasing heat comprising the steps of:
- providing at least partially charged energy storage material in a fluidized bed apparatus,
- initiating a reaction of the energy storage material in the fluidized bed apparatus so that heat is released, and
- transferring heat from the energy storage material,
- wherein the energy storage material is provided in volumes coated with an outer layer of solid particles of a different material, wherein the volumes have a largest size in the interval 1-1000 μm, and wherein the solid particles have a largest size in the interval 1-500 nm,
- and wherein the energy storage material comprises at least one selected from a salt, CaO, Ca(OH)2, CaCO3, MgO, Mg(OH)2, MgCO3, and metal hydrides,
- wherein the salt is selected from the group consisting of chlorides, bromides, carbonates and nitrates of lithium, magnesium, calcium, nickel, iron, zinc, manganese, and potassium, as well as hydroxides of lithium, sodium and potassium.
Dependencies are inferred from the claim text.