Lower production and life cycle costs of renewable energy from wind power

SeaTwirl’s wind turbines use a vertical-axis wind turbine with a tower connected to the sub-sea structure, consisting of a floating element and a keel. As the energy of the wind causes the turbine to rotate, the structure maintains its stability by using the keel and the counter turning moment, similar to the function of a keel on a sailboat.

The wind turbine, the tower and the sub-sea part are assembled and rotate as one unit. Around the tower, above the water surface but below the wind turbine, is an enclosed, stored generator housing that is static or non-rotating. The generator housing and the wind turbine are anchored safely to the seabed by several catenary mooring lines.

SeaTwirl turbines can be sited in areas that are currently out of reach for offshore wind turbines (that are limited to a depth of about 50-60 metres). SeaTwirl turbines can be anchored much deeper than 50-60 metres (unlike any other wind offshore turbines on the market today). This means that SeaTwirl can be sited where winds are stronger and more reliable. 

Research and scientific reports also show that vertical-axis wind turbines have a high structural limit and can be built larger than horizontal-axis wind turbines.

SeaTwirl benefits

Less load on the bearings

Thanks to the floating sub-sea structure of the wind turbine, the bearings inside the generator housing do not need to carry the weight of the turbine. This is unique to SeaTwirl and means that the bearings are subjected to less loads than in other wind turbines.

Easy maintenance and low centre of gravity

SeaTwirl’s wind turbines have a lower centre of gravity and a more stable design than horizontal-axis wind turbines, because the generator and all parts that require maintenance can be placed under the turbine and above the water.

Lower overall cost

SeaTwirl wind turbines are easily accessed which reduces service costs. The company’s unique system ensures lower manufacturing costs, lower life-cycle costs (i.e. reduced need for service and maintenance) and thus a lower overall cost. This is especially important for offshore structures.

Patented technology

SeaTwirl has patented a number of ground-breaking technologies and approaches that make its products more robust, easier to maintain and cheaper to produce. This means that SeaTwirl can produce renewable wind energy at a much lower cost than its competitors.