After the boom for new wind turbines in Germany in the past years, the repowering of these turbines gains more and more importance today. In the future, larger units will replace the smaller and older wind turbines, especially at sites with strong wind conditions. Siemens Power Generation (PG) is to supply a total of 17 wind energy turbines for three repowering projects in Germany. Of these, seven wind turbines will be for the Marienkoog project, and seven will be for the Norderhof Wind Park in the North Frisian area, in Schleswig-Holstein. Additionally, three wind turbines are soon to be installed in Bremerhaven.
The seven 3.6-megawatt (MW) machines for Marienkoog will replace 15 aging wind turbines. The operator of these plants is Buergerwindpark Galmsbuell GmbH. With an installed capacity of over 50 MW, this project will be the largest wind farm in Germany when it begins commercial operation scheduled for mid-2007. In addition to the large 3.6-MW machines, Buergerwindpark has selected seven 2.3-MW wind turbines for Norderhof Wind Park.
Also, in Bremerhaven, aging wind turbines are being replaced by new equipment. At the Weddewarden Wind Park three 2.3-MW machines, with a rotor diameter of 93m and a hub height of 103m, are replacing four small units. This will increase the installed capacity from 2 MW to nearly 7 MW.
Alfons Benzinger | Press Office Power Generation
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For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.
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Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.
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