Our innovative Disconnectable Turret for Renewables (DTR) addresses one of the key challenges in the expanding floating wind industry. The system enables safe and controlled disconnection and re-connection of floating offshore wind turbines (FOWTs), thus reducing the Levelised Cost of Energy (LCOE) together with risks to people, equipment and the environment.
By leveraging technology from the offshore oil & gas industry SBT Energy have developed a disconnectable buoy without swivels or bearings, which will support the moorings and power cables when not connected to the FOWT. This will avoid having to lay down the ends of moorings and power cables on the seabed, prior to the FOWT arrival and when ‘out of service’.
Our innovative system* maximises the use of standard industry components and enables the DTR to be used within a spread mooring arrangement of most semi-submersibles. With our novel arrangement of the mooring line connections, the number of operations is minimised and also potentially avoids any direct handling of the power cables.
The benefits of the DTR are particularly important in deep water due to the very long mooring line and power cables section, which have significant overage length to be handled. The use of a DTR will avoid having to lay-down and recover mooring lines and cables, reducing risks, offshore time, maintenance and potential repair costs. The DTR also allows pre-tensioning and commissioning operations to be performed prior to arrival of the foundation, increasing flexibility in the construction and deployment schedule.
The DTR may be designed for use with many of the current FOWT configurations and most existing mooring components allowing significant LCOE reductions across the industry.