Cylindrical floater specialist Sevan SSP has unveiled a novel design for a circular moonpool foundation for use on offshore wind farms in what it calls deeper, harsher, colder and windier sea areas.

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The company said the floating wind concept is based on Sevan’s cylindrical hull design for floating production, storage and offloading vessels and drilling rigs.

The small waterplane area cylindrical hull — known as Sevan SWACH — is a cylindrical floating moonpool foundation for offshore wind turbines.

Sevan's floating wind design uses an open-centred foundation concept.

The solution is scalable up to the wind turbines as large as 14 megawatts and offers excellent motion characteristics in challenging and harsh conditions, the company said.

It is suitable for modularised fabrication and assembly, with the shallow draft enabling the structure to be fully assembled onshore with a wet tow to final location.

“As the offshore wind market is moving into deeper and harsher environments with larger turbines, there is a call for cost-efficient floating foundation technologies,” the company said.