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Norwegian-based company Sway is a renewable energy company, with world leading technology and competence on floating wind turbines located in deep water.
State company Enova has allocated 17 million euros for the construction of the largest floating wind turbine designed for offshore wind farms. This prototype, developed by Sway, has a capacity of 10 MW and is equipped with a rotor having a diameter of 145 metres. The wind turbine will have to be tested onshore for two years before being installed in the North Sea.
Unlike most wind farms which are based directly on the seabed (up to a maximum depth of 60-70 meters) the Sway turbine floats and can therefore be installed offshore at depths of several hundred meters.This implies a substantial difference in terms of generated energy, since in Norway, for example, winds blowing about 50 km off the coast (where depths typically range from 100 up to 300 meters) are approximately 25% stronger and more constant than in areas up to 15 km off the coast, where the largest power plants were built up to now.
The buoyancy of the new wind turbine is based on the large internally hollow supporting tower, which extends below the water surface and is filled with ballast, thus having sufficient stability to resist wind loads. The structure is anchored to the seabed also by means of lateral suction anchors, allowing the tower to tilt a few degrees and to turn around, so as to harness more energy from winds, while reducing excessive structural tensions.
Solar Breakthrough: Water to Hydrogen with 60% Efficiency
British scientists say they've achieved a breakthrough, figuring out how to extract hydrogen from water with an unheard-of 60% efficiency using solar energy. The secret sauce is nanotechnology, in the form of nanoclusters of indium phosphide encrusted on a gold electrode. Using this, they can turn sunlight into that hotshot hydrogen fuel, clean-burning and as energetic as a swift kick in the ass.