Saving 150 000 MT of steel compared to the use of semisubmersible substructures for 15 MW WTGs, in a 1 GW windfarm development, at 150 meter water depth.
No relative motions between the seabed and the caisson. This simplify the export/signal cable bundle arrangement.
The “OWS Substructure” can be installed in advance, allowing infield cables to be installed whilst waiting for the tower, with nacelles and blades ready to be installed fully assembled on the “OWS Substructure”. This will shorten the field development period by an estimated 30 %.
Opens for wind park developments in areas with water depth neither suitable for conventional bottom fixed substructures nor floating substructures.
The “OWS Substructure” design simplify the installation of fully assembled WTGs offshore at deep water. The “OWS Substructure” has no vertical motion and allowing a certain flexibility of horizontal displacement during the installation phase by an Semi Submersible Crane Vessel (SSCV) with active heave compensated cranes.
An inshore assembly site, which is normally required for floating WTGs, will not be necessary — saving time, costs, and reducing environmental impact.
Marshalling sites can be reduced in size, simplifying transport logistics and handling of WTG components.
