Navantia floating turbine progress

A prototype WindFloat was built and installed at the site off Portugal in 2011 A prototype WindFloat was built and installed at the site off Portugal in 2011

Major Spanish shipyard group Navantia has started the construction of the floating foundation for the first full scale floating wind turbine that will be installed at the Portuguese WindFloat Atlantic project.

This construction work is taking place at Navantia’s shipyard at Fene which is located at the port of Ferrol near La Corunna and it comes after the Navantia-Windar joint venture won a contract for the works a few months ago.

By the end of June 2019, it is planned that the three column semi-submersible foundation will be transported to the Outer Port in Ferrol, where the construction will be completed with the installation of a MHI Vestas 8.4MW offshore wind turbine on top of the supporting column. The complete structure will then be towed to Portugal for installation about 10 miles off the Viana do Castelo coast, in a water depth of 100 metres. By completing the full construction of this turbine tower in harbour a considerable amount of time and risk is taken out of the project with the dramatic reduction in the work required in offshore Atlantic waters.

A prototype WindFloat was built and installed at the site off Portugal in 2011 and decommissioned in 2016. This was a small scale version of the unit now under construction and had a tower just 80 metres in height compared with the 100 metre tower of the unit currently under construction and it supported a 2MW turbine. Developed by the American company Principle Power, the WindFloat 1 concept was installed for demonstration purposes. Having completed all of its project objectives and supplied power to the Portuguese grid over a 5 year period, Principle Power decommissioned the WindFloat 1 at the end of September 2016.

The WindFloat semi-submersible foundation that has been developed by Principle Power and the project off Portugal will feature three of the units supporting the 8.4MW turbines. The foundations and the wind turbines will be entirely built and assembled on land or in harbour, prior to being towed out to their final location. WindFloat Atlantic is expected to be operational in 2019, and is being developed by WindPlus, a consortium of EDP Renewables, Mitsubishi Corporation (DGE), Chiyoda Corporation, Trust Energy (Engie and Marubeni), and oil company Repsol.

By Dag Pike

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