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A company making wooden wind turbine blades has successfully tested a 50-meter-long prototype that’s set to debut soon in the Indian and European markets.
Last year, the German firm Voodin successfully demonstrated that their laminated-veneer timber blades could be fabricated, adapted, and installed at a lower cost than existing blades, while maintaining performance.
Now, Voodin has announced a partnership with the Indian wind company Senvion to supply its 4.2-megawatt turbines with these wooden blades for another trial run.
Wind power has accumulated more than a few demerit points for several shortfalls in the overall industry of this fossil-fuel alternative.
Some of these, such as the impact on bird life, are justified, but none more so than the fact that the turbine blades are impossible or nearly impossible to recycle, and that they need to be changed every 25 years.
Wind turbine blades are made from a mixture of glass and carbon fiber heated together with sticky epoxy resin, and these materials can’t be separated once combined, which means they go into landfills or are incinerated when they become too battered to safely operate.
GNN has reported that folks will occasionally find second-life value in these giant panels, for example in Denmark where they are turned into bike shelters. In another instance, they’re being used as pedestrian bridges.
But there are way more wind turbine blades being made every year than pedestrian bridges and bike shelters, making the overall environmental impact of wind power not all green.
“At the end of their lifecycle, most blades are buried in the ground or incinerated. This means that—at this pace—we will end up with 50 million tonnes of blade material waste by 2050,” Voodin Blade Technology’s CEO. Mr. Siekmann said recently. “With our solution, we want to help green energy truly become as green as possible.”
The last 15 years have seen rapid growth in another industry called mass timber. This state-of-the-art manufacturing technique sees panels of lumber heat-pressed, cross-laminated, and glued into a finished product that’s being used to make skyscrapers, airports, and more.
At the end of the day though, mass timber products are still wood, and can be recycled in a variety of ways.
“The blades are not only an innovative technological advancement but a significant leap toward sustainable wind production,” said Siekmann, adding that this isn’t a case of pay more to waste less; the blades cost around 20% less than carbon fiber.
Additionally, the added flexibility of wooden blades should allow for taller towers and longer blades, potentially boosting the output of turbine by accessing higher wind speeds.
Now partnered with Voodin, Senvion will begin feasibility analysis in the next few months, before official testing begins around 2027.
