Combination of supercritical wet combustion and compressed air energy storage
AssigneeDipac Associates
InventorNorman L. Dickinson
Life of this patent
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Abstract
A fuel efficient combination of pressurized combustion and compressed air energy storage in which combustion air compressors have excess capacity which is utilized, during off-peak periods, to charge an underground storage cavern. Air withdrawn from the cavern during peak periods is utilized as combustion air, freeing the turbines which drove the air compressors during the off-peak period to power generators producing peak load electricity.
Claims12
A combination of pressurized combustion and compressed air energy storage in which air is compressed to combustion pressure by means of a compression train comprising a plurality of stages, combustion heat is transferred at combustion pressure to boiling feedwater, cooled flue gas is reheated and expanded through turbines which drive the compressor stages, the compression train having capacity in excess of that required for combustion during off-peak periods, the excess compressed air during such periods being charged to a storage cavern.
A combination of a pressurized combustion and compressed gas energy storage in which flue gas from the combustion is, during off-peak periods, cooled and cleaned under essentially combustion pressure and charged to a storage cavern from which, during peak periods, it is withdrawn, heated and expanded through turbines driving peak load generators.
An energy storage process in which compressed air is charged, during off-peak periods, to a storage cavern from which, during peak periods, it is withdrawn and utilized as combustion air in a pressurized combustion to which solid fuel is charged as an aqueous slurry containing alkali, in an amount at least the chemical equivalent of the sulfur in the fuel as alkali sulfate, combustion temperature is controlled below a maximum of 1600 degrees F. by the injection of water and combustion products, after separation therefrom of solid products by a gas-solids separating device, are expanded through turbines driving generators which produce peak load electricity.
Dependencies are inferred from the claim text.