The PivotBuoy Technology - Explanation

X1 Wind developed an innovative floating wind platform that significantly reduces capital expenditures (CAPEX) and the Levelised Cost Of Energy (LCOE). 

The PivotBuoy floating platform presents a hybrid concept between a semi-submersible floater and a tension-leg mooring system.

The tripod-like upper structure and the downwind turbine allow a more efficient load configuration in which the main masts are tensioned, and the side masts are compressed, avoiding the high bending moments that make design complex in traditional concepts. In addition, by having a single point mooring, the platform can weathervane and passively remain aligned with the wind direction during its operation, without the need for active yaw systems. The TLP is also the optimal solution for deployment in very deep waters and is coupled with a patented quick connector that significantly simplifies the installation processes.

The combination of all these systems brings some unique advantages to the design. It optimizes the platform loads and uses slender tubular elements, which result in an expressive reduction of the global steel weight. Adding to the lighter structure, the proprietary quick connection system, developed in-house by the company’s mechanical engineering experts, allows simplified and quicker installation and maintenance processes, which can be easily performed by smaller vessels available in local ports. Furthermore, the design eliminates the need for active mechanisms such as yaw and ballast, and includes a proprietary SCADA monitoring system, making the operation of the platform reliable and efficient. Lastly, the TLP mooring has an outstandingly small seabed occupation when compared to the traditional catenary systems, improving the compatibility of the windfarm with other sea uses, such as fisheries, research, or biodiversity protection, as well as allowing more platform units in the same maritime zone.

The installation procedure comprises the pre-installation of the mooring system and the later quick connection of the platform, using small to medium vessels for transportation and hook-up procedures. This makes offshore operations simpler, reduces possible constraints of the fleet, and lowers the installation costs.