Environment

MM82 BurnfootHill

Shadow and sound protection: Prepared to meet any demand

The acoustic and optical aspects of a wind power plant must be taken into account from the initial planning stage. The Federal Immission Control Act (Bundes-Immissionsschutzgesetz) prescribes protective measures against noise or air pollution. As a consequence wind turbines that are situated close to residential areas must not exceed certain sound emission values or shadow periods. Senvion wind power plants ensure you are perfectly equipped to meet these demands.

Innovative control of sound and shadow

The sound management of Senvion wind power plants provides sound protection by turning down the number of revolutions to a lower sound level. In this way legal requirements can be met without any problems. As all of our wind power plants are gearbox-driven, sound protection by speed adjustment can be realized at reasonable costs. Optical factors must also be considered, e.g. the shadow cast by the rotor on adjacent properties. Should this shadow period exceed certain legal reference values (in Germany i.e. 30 hours p.a./30 minutes p.d.) it must be shortened. Our shadow management takes care of this via a light sensor and an integrated timer. The shadow cast module recognizes sunlight level and time. If reference values are exceeded, the wind power plant is stopped for the necessary period of time – avoiding any possible disturbance of the local residents.


Bat friendly wind power plants

Up in the air, our wind turbines’ rotors are not the only ones who are busy. After dusk, bats become active and go hunting, especially in the summer months. We do not want our wind power plants to cause any damage to the animals during this period, all Senvion wind turbines situated in the vicinity of bat populations, hunting grounds or migration routes are equipped with special "bat protection".

Automatic shutdown for bat protection

The bat protection system causes the wind power plant to shut down automatically when the designated conditions for bat activity are met. Parameters for this may be defined by season, wind speed, temperature, or the twilight times, depending on the habits of the native bat species. The wind speed parameter, for instance, defines at what minimum wind speed the wind power plant may be operated without endangering any bats that need low winds to fly.

If all parameters are met, the bat protection system is activated to prevent endangering the animals.