Nordex4MWThe Nordex Group has presented the latest development stage of its Delta platform: the Delta4000 series. The N149/4.0-4.5 turbine, which has been designed specifically for light-wind regions, has a 30 per cent increase in rotor sweep and a variable power output of 4.0 to 4.5MW.

As the maximum output of the turbine varies between 4.0 and 4.5 MW it’s possible to optimise the overall yield of a wind farm by means of the different maximum output of individual turbines, thus always exploiting the full potential of each turbine position within each single wind farm. The rotor diameter was increased by 18 metres, compared to the N131, and the company has kept the same one piece rotor blade structure while optimising the design for transport and production. The rotor blade structure was developed, in part, by knowledge and expertise provided by SSP, a Danish manufacturer which specialises in longer rotor blades and was taken over by the Nordex Group spring this year. The maximum sound power level of the N149/4.0-4.5 lies between 103.6 dB(A) and 106.1 dB(A). The towers initially available include those with hub heights of 105 to 164 metres. Especially for cold climate regions, the Nordex Group also offers a cold-climate variant and a rotor blade Anti-icing System. The Nordex Group plans to start series production of the N149/4.0-4.5 in 2019. The first test turbines will be set up in 2018 in order to determine the parameters of relevance for certification.