Repowering

Not only do modern wind turbines utilise the energy provided by the wind more effectively allowing for a minimisation of production costs for wind energy, but it is also possible to integrate them into a local grid far better. Besides a noticeable reduction of the number of wind turbines there is also the possibility of removing old turbines, which in the past often were scattered and close to residential areas and replacing them with new turbines which are planned in a more structured manner. This also allows for conflicts with nature conservation which might have existed at the old sites to be solved in the course of repowering.

Not only do modern wind turbines utilise the energy provided by the wind more effectively allowing for a minimisation of production costs for wind energy, but it is also possible to integrate them into a local grid far better. Besides a noticeable reduction of the number of wind turbines there is also the possibility of removing old turbines, which in the past often were scattered and close to residential areas and replacing them with new turbines which are planned in a more structured manner. This also allows for conflicts with nature conservation which might have existed at the old sites to be solved in the course of repowering.

The rotor blades of state of the art wind turbines rotate at comparably low revolutions. Because of this they appear optically and acoustically more pleasant than old turbines which operated at far higher revolutions. The blades of turbines built in the 1990s revolve between 40 to 60 times per minute whereas their modern successors only need between 10 and 20 revolutions per minute. In this way modern turbines are also able to score from an emissions control point of view as they are less noise polluting than the old ones.

We repower together with the operators and the investors and lead existing projects to higher and renewed value. The risk for investors is minimal as conditions on site are known. We implement only modern turbines and reliable technology. The old turbines are dismantled and sold. The first phase of one of Europe’s biggest repowering projects located in Klettwitz, Brandenburg was recently taken into operation. The 36 old wind turbines were decommissioned and fully dismantled. They were replaced by 27 more efficient turbines offering the latest generation of technology the last one of which was taken into operation on the 12.06.2015. Each of the new turbines produces at least four times as much electricity as one of the old ones did.

Its rated power of 93MW puts the site of Klettwitz back amongst the top 10 of Germany’s most powerful wind parks. In the course of repowering the distance between the turbines and the surrounding residential areas was increased to a minimum of 1.000m thus fulfilling the requirements in Brandenburg.

The dismantling of the old turbines as well as the construction of the new ones partially involved the same land plots used by the old wind park. In addition to this the wind park was considerably enlarged using an area formerly used for opencast mining. The recultivation of land followed immediately after the dismantling of the old turbines as well as their foundations. The holes left after the removal of the foundations were filled with top soil and substrate. Following this, the old crane sites will be removed and recultivated. Further measures associated with nature compensation are in preparation.

Beyond the current project, plans for expanding the wind park in Klettwitz are well under way. Further areas suitable for erecting and operating wind turbines were determined within the borders set by the regional development plan.

 

 

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