Subsea hydrogen storage system
AssigneeSubsea 7 Norway AS
InventorsSigbjorn DAASVATN, Torstein MELING
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Abstract
A subsea unit suitable for storing hydrogen gas underwater comprises a weighting base and an array of interconnecting storage tanks on the base. The base may be cast from concrete on a deck of a vessel from which the unit is subsequently launched into water. A protective structure fixed to the base covers the array of tanks. A restraint system, comprising a series of strap restraints curving around the top of each tank, secures the tanks to the base against buoyant upthrust. The restraints are attached to elongate tensile members extending upwardly from the base, disposed on opposite sides of the underlying tank. The arrangement transfers loads efficiently from each tank to the base on load paths that bypass the other tanks.
Claims37
-37. (canceled)
A method of providing a subsea gas storage unit, the method comprising:
- manufacturing a weighting base;
- assembling on the base an array of interconnecting storage tanks and a restraint system that secures the tanks to the base against buoyant upthrust, wherein the restraint system defines load paths from each tank to the base that bypass all other tanks of the array;
- and
- fixing a protective cover structure to the base, the cover structure extending over the array of tanks,
- wherein the tanks have walls of a fibre reinforced polymer composite.
A subsea gas storage unit, comprising:
- a weighting base;
- an array of interconnecting storage tanks positioned on the base;
- a restraint system that secures the tanks to the base against buoyant upthrust, wherein the restraint system defines load paths from each tank to the base that bypass all other tanks of the array;
- and
- a protective cover structure disposed over the array of tanks and fixed to the base,
- wherein the tanks have walls of a fibre reinforced polymer composite.
An offshore installation capable of generating electrical energy from a renewable source, the installation comprising an electrolyser powered by that energy and at least one whose tanks are in fluid communication with the electrolyser.
Dependencies are inferred from the claim text.