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Odfjell Oceanwind's floating foundation progresses toward full DNV approval

By: Tom Russell 30/08/2022 Odfjell Oceanwind

General Windfarms

Odfjell Oceanwind has confirmation from DNV that the main scantling approval of its Deepsea Semi floating wind foundation design is close to completion. Main scantling approval is part of the full classification process.

DNVs Main Scantling Approval (MSA) is an independent assessment of the global load bearing structures with respect to nominal plate thickness, stiffener and girder dimensions, and grade of materials. The purpose of an MSA is to enable early ordering of the majority of steel material with confidence that no major dimensions will change during the final approval step.

The Deepsea Semi floating wind foundation design is developed for use in floating wind farms and for off-grid applications including temporary electrification of oil and gas installations in harsh environments. It was awarded Approval in Principle from DNV in January 2022, and the main scantling class approval is based on the SG 11.0-200 DD offshore wind turbine from Siemens Gamesa. The approval from DNV is based on an assessment of the integrated foundation with turbine unit, in a joint effort and process involving Odfjell Oceanwind, Siemens Gamesa and DNV.

“We are very pleased to be a close partner in this project and look forward to continuing to work with Odfjell Oceanwind and Siemens Gamesa on the classification and certification of the Deepsea Semi™ concept," said Erik Henriksen, Director of Business Development - Offshore Classification at DNV. “Since the completion of the Approval in Principle earlier this year the concept has matured and the main scantling approval is progressing well.”

According to Odfjell Oceanwind, the Deepsea Semi foundation is developed for low cost, industrial mass-production and already dimensioned for up to 15MW wind turbine generators including SG 14.0-236 DD. It intends to continue towards DNV class approval of the foundation also for these larger turbines soon to be commercially available for floating application.

“Class approval of the Deepsea Semi with the selected wind turbine will mark another important milestone for us,” said Per Lund, CEO of Odfjell Oceanwind. “We continue building on the long-term relationship with DNV which we plan to extend also through full classification and certification of Floating Offshore Wind Units (FOWUs) for wind park application as well as our own fleet of Mobile Offshore Wind Units (MOWUs) for off-grid application. We now have a product readily available and very well suited for near term oil&gas electrification initiatives, innovation parks in North-West Europe as well as wind park projects like Utsira Nord, Celtic Sea and Scotwind, including locations West of Shetland."

The proprietary Deepsea Semi design has been developed for use both in Floating Offshore Wind Units (FOWUs) for wind park application as well as Odfjell Oceanwind’s fleet of Mobile Offshore Wind Units (MOWUs) for off-grid application by their in-house design team. The wind units typically would go into operation around two years from order.

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Odfjell Oceanwind's floating foundation progresses toward full DNV approval

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