RWE is to use the worldwide-first recyclable rotor blades at its 1GW Danish offshore wind farm Thor.
Of the 72 (SG 14-236 DD) wind turbines, 40 will be equipped with recyclable rotor blades manufactured by Siemens Gamesa.
Installation at sea is expected in 2026.
In addition, RWE is piloting CO2-reduced steel towers at half of the project’s turbines.
The GreenerTower from Siemens Gamesa will ensure a CO2 reduction of at least 63% in the tower steel plates compared to conventional steel, RWE
RWE chief executive for offshore wind Sven Utermöhlen said: “At RWE we are fully committed to working towards circularity and net-zero emissions.
“We are already testing the world’s first recyclable wind turbine blades under real-life conditions at our German offshore wind farm Kaskasi and we have decided to install them at Sofia.
“By using these rotor blades at our Thor offshore wind farm, too, RWE continues lead the way towards a circular offshore sector.
“And we are doing even more. We are the first developer in the world to pilot Siemens Gamesa’s CO2-reduced steel towers, which significantly reduce the carbon footprint of wind turbines.
“This is the right direction for the future of our sector, which has sustainability at its core.”
Rotor blades can be recycled at the end of their life cycle
While many components of a wind turbine already have established recycling practices, recycling the composite materials used in wind turbine blades has been more challenging.
Now, for the first time, thanks to a new type of resin with a special chemical structure the composite materials used in Siemens Gamesa’s recyclable blades can be separated again, RWE said.
This process ensures that the properties of the individual materials remain intact so that they can be reused in new casting applications, for example in the automotive industry or in consumer goods, it added.
Maximilian Schnippering, head of sustainability at Siemens Gamesa: “More than one million tons of blade material are expected to be installed globally every year.
“Our recyclable blades can avoid those materials ending their life in a landfill and give them a second use.”