New technology for renewable energy – the German company wants to expand the possibilities of building offshore wind farms. Test plan: lake, Baltic sea, China.
First the lake, then the sea, then Pacific coast of China. That’s the plan to test a new technology for obtaining renewable energy from wind. In the North of Germany near Bremerhaven energy company EnBW and engineering firm Aerodyn Engineering began testing a floating wind turbine. More precisely, its model in 1:10 scale. The project was named Nezzy2.
EnBW – specialist in marine vetroparka
EnBW already has considerable experience in the field of offshore wind energy. Since 2011 the company operates in the Baltic sea Germany’s first commercial offshore wind farm, comprising 21 wind turbines in 2015 close to him was commissioned a much larger Park with 80 turbines, with January 2020 87 more powerful turbines in the two parks in the North sea provide “green” electricity statistically 710 thousand households.
The company intends to continue to rapidly develop offshore wind power, including its French subsidiary company Valeco, as in Germany, the onshore installation of wind turbines are increasingly met with resistance by the local population. The sea is the other problem, technical: to put on the bottom of the wind turbines economically viable in depths of up to 50 meters. So the relatively shallow Baltic and the North sea suitable for this purpose, but on the Atlantic coast of France with the available technology especially not turn around.
Hence, we need not stationary and floating wind turbines. Their development for about a decade of experience established in 1997 in the town of Rendsburg in Northern Germany Aerodyn Engineering firm specializing in the development of technical solutions for wind turbines. Testing his previous project Nezzy, she held in 2018, at the deep of the Pacific coast of Japan.
Nezzy 2 will anchor in China
And now the project Nezzy2, consisting of two interconnected wind turbines with a height of 18 meters. They are mounted on a floating concrete Foundation, which lies just below the surface of the water, so that from the visible only three holding it at the desired depth “float”. The Foundation is fixed at the bottom of the six anchors.
Two wind turbines make the floating design is more stable, it has proven the test model in scale 1:36, successfully conducted in special installation with artificial waves in Cork in Ireland. Now began the first phase of testing an 18-metre model takes place in Germany on the lake with a depth of 10 meters at a scale of 1:1 would correspond to 100 meters. Since there are no waves, no currents, we tested mainly the work of wind turbines.
Then for two and a half months model Nezzy2 going to experience in the Baltic sea, after which the structure was dismantled, to the end of 2021, together with a Chinese partner to start off the coast of China testing the final version of the floating wind turbine height of 180 meters and with a total capacity of 15 MW.
Floating wind farms – it is not fiction
“The potential of a new technology is huge. It can be used in the countries and sea areas, with large depths, which will expand opportunities for renewable energy,” says Hannah könig (Hannah K?nig), head of Department at EnBW wind and marine equipment.
“We are convinced that Nezzy2 will allow the global wind energy in the future to produce the sea from the wind more favorable electricity,” says Executive Director of Aerodyn Engineering Zenke of Sigfridson (S?nke Siegfriedsen). Because floating wind turbines will be mounted on the shore, and then the finished design just to tow in the desired position, which is significantly cheaper than installation in the sea of stationary wind turbine.
On floating wind turbines are now working not only EnBW and Aerodyn Engineering. The most famous project is the Hywind Scotland – the world’s first floating wind farm of five turbines at 6 MW built in 2017 in the North sea Norwegian energy company Equinor off the coast of Scotland. Similar projects with different technologies there are in Portugal, Spain, France, and Japan.
So floating in relatively deep waters of the Atlantic and Pacific oceans windmills – this is not fiction, but began the next day. EnBW seeks to accelerate his arrival, but don’t forget about “traditional” wind farms. Another one with a capacity of 900 MW, which will be up to 100 fixed on the bottom of the North sea towers, the company plans to build by 2025.