The German manufacturer announced the new 3.4M114 turbine at the WindEnergy Hamburg trade show, as an uprated version of it 3.2M114 turbine.
This 3.4MW turbine is expected to increase the annual energy yield by 2.5% compared with the existing 3.2MW machine at average wind speeds of 7.5m/s. It will be offered at hub heights of 93, 119 and 145 metres.
The towers will be of purely steel construction, the first time that Senvion has used steel towers over 100 metres. A prototype of the turbine is already operating in Sankt Michaelisdonn in Schleswig-Holstein, northern Germany.
Senvion also revealed an adaption of its 3.2M114 turbine, which will be equipped with vortex generators on the blades. The company said that this addition should improve the performance of the rotor, as the airflow is guided along the blades for longer.
At an average wind speed of 7.5m/s, the yield from the 3.2M114VG is increased by 1.5%, Senvion said, compared with the 3.2M114. The turbine will be offered in hub heights of 93, 123 and 143 metres, and is currently being certified.