Due to the optimized geometry of the submerged structure, the Tri-Floater design exhibited low accelerations at the wind turbine nacelle during the model tests, in good agreement with numerical predictions. Lower accelerations are particularly beneficial since these translate to lower load levels and ultimately lower steel weight of the structure which is one of the most important cost drivers in floating wind.
The Tri-Floater model was subjected to a wide range of environmental conditions to demonstrate the suitability of the design for most of the floating wind sites currently being considered. These included operational conditions which the wind turbine would normally see during its lifetime as well as extreme conditions which it would have to endure during storms. An extreme sea state with a significant wave height of 13.5 m and wind speed at hub height of 190 km/h was tested. The Tri-floater successfully ‘passed’ this test and the results confirm the performance of the Tri-floater in harsh environments.