SIEMENS – A crucial factor affecting the energy yield of a wind turbine, besides air density and wind speed, is the rotor swept area over which the wind flows. This swept area, in turn, is determined by the length of the rotor blades. The industry trend is clearly heading in the direction of longer and longer rotor blades. The Siemens rotor consisting of three 75-meter rotor blades has a diameter of 154 meters and covers a surface area of approximately 18,600 square meters, equal to about two and a half soccer fields. The Siemens 6 megawatt wind turbine will generate about 65% more energy using the 75-meter rotor blade compared with the Siemens 3.6 Megawatt bestseller using the earlier blade with a length of 58 meter.
Transporting the world’s longest rotor blade, at 75 meters, is not only technically or logistically challenging but also an impressive feat of the truck’s driver. The vehicle is 85 meters long, five meters wide and four meters high. more> http://tinyurl.com/czx6lrl
- World’s longest wind turbine blade (theneteconomy.wordpress.com)
- Siemens builds 75-metre-long rotor blade from a single mould (wired.co.uk)
- Siemens unveils world’s largest wind turbine blades (gizmag.com)
- Wind turbine with record-breaking rotors (phys.org)