Saitec Offshore Technologies and RWE progress with construction of DemoSATH

Saitec Offshore Technologies and RWE Renewables are progressing with the construction of the DemoSATH joint pilot floating wind project.

The latest milestone has been the handling operation of the prototype. This consists on lifting, pivoting, and positioning the 6 precast elements that have initially been prefabricated. These elements compose the floaters of the platform and include 4 conical elements (2 per floater) and 2-cylinder elements (1 per floater).

The two companies will test SATH floating platform in which will be mounted a 2 MW wind turbine. The base of the structure will be approximately 30 metres wide and 64 metres long. The platform will be towed to its anchorage point in a test field (BiMEP) 2 miles off the Basque coast (Spain), where the sea is about 85 metres deep. DemoSATH will have the potential to produce electricity for 2,000 homes.

The DemoSATH prototype consists of two hulls, each with three prefabricated segments. The positioning and pivoting manoeuvre of these pieces has been carried out using two cranes with capacities of up to 500 tons. These cranes have raised the pieces 14 metres high and transported them 150 metres away to the specific construction supports at the foundation slab that has been specifically designed and constructed for this purpose. It is remarkable that the floater positioning results had an error below 1 centimetre.

The next phase involves the full assembly of the prototype and the execution of the rest of the elements of the platform. At the same time, new precast phases and movements of large components will be done, such as the installation of the tower and the wind turbine.