Wind turbine with record-breaking rotors

August 6, 2012 by  
Filed under Wind Energy Tips


To produce the B75 rotor blade, uses the patented IntegralBlade process, in which the entire blade is poured as a single piece made of glass fiber-reinforced epoxy resin and balsa wood. As a result, the blade has neither seams nor bonded joints and is extremely robust. The gigantic rotor, which measures 154 meters, has to withstand huge air masses, as it is hit by the energy of 200 tons of air per second when the wind blows at a speed of 10 meters per second. 

Thanks to another patented process, QuantumBlade, the rotor blade weighs 20 percent less than conventionally produced blades. As a result, the nacelles, towers, and foundations can be made lighter as well, which reduces the facility’s cost. The weight reduction is achieved by using specially designed blade profiles that are also shaped in a way that delivers maximum rotor performance at a range of different wind speeds. 

Siemens has been manufacturing wind power plants for the past 30 years. The size and output of the associated technology has steadily grown during this time. Whereas the first generated 30 kilowatts and had five-meter-long , the latest turbines can produce six megawatts of power. The first two six-megawatt turbines from Siemens (equipped with standard 60-meter rotor blades) are now being installed and tested at the Gunfleet Sands wind farm off England’s south coast. Over the next several years, the Danish energy supplier Dong plans to install 300 gearless Siemens wind turbines off the British coast. These turbines will be equipped with the new record-breaking rotor blades. Wind power plants are part of Siemens’ Environmental Portfolio, with which the company generated about €30 billion in sales in business year 2011.

Provided by Siemens

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