For offshore wind turbines size matters

(Climate News Network, 7 Mar 2019) As turbines grow in size and costs tumble, offshore wind turbines, both floating and fixed to the seabed, have vast potential.

Offshore wind power is set to become one of the world’s largest electricity producers in the next decade as costs fall and turbines grow in size.

Up till now turbines standing on the seabed near to the coast in Europe have been seen as the most promising technology for offshore wind farms. But the success of floating machines that can be deployed in deeper water has meant many more coastal communities can benefit. Japan and the US are among the countries with the greatest potential.

The speed with which the industry has grown in the last decade has defied all expectations. Large turbines used to have a two to three megawatt output, but now the standard size is 7.5 megawatts and turbines capable of generating up to 10 megawatts are in the pipeline.

As a result the output of one offshore turbine is thirty times greater than with the first ones deployed in 1991 − and the cost has fallen to half that of new nuclear power.

This, coupled with experience showing that the wind blows more steadily out to sea and produces far more consistent power than turbines on land, has led many more countries to see offshore wind as a major potential source of renewable energy. The turbines have shown themselves to be robust even in extreme storm conditions.

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Climate News Network, 7 Mar 2019: For offshore wind turbines size matters