Crafting Wooden Wind Farms For A Greener Tomorrow

a green breakthrough in clean energy slashing cO2 and powering homes

Wind energy plays a crucial role in decarbonizing the grid, but the massive structures often use carbon-intensive materials such as steel. Modvion, a Swedish startup, is addressing this issue by incorporating Scandinavian design to achieve 'net zero wind power' through the construction of wooden towers. Their latest achievement is the unveiling of the world's tallest wooden wind turbine tower near Gothenburg in southwest Sweden, standing at 150 meters. This innovative structure, equipped with a 2-megawatt generator, is now providing sufficient clean energy to sustain approximately 400 households.

is wood a good alternative to steel for wind towers?

Modvion's laminated wood towers, crafted from modular components that are easily stackable on lorries and do not require reinforcement, present an innovative alternative to traditional steel wind turbine towers. While steel is renowned for its strength and durability, the challenges of transporting and assembling towering structures have led to the exploration of wooden towers. With a higher strength-to-weight ratio, wooden towers allow for lighter construction, easing logistical complexities. Additionally, they offer cost advantages over time, especially for taller structures, and can be joined using glue rather than numerous bolts, streamlining the assembly process. Modvion has successfully installed wooden towers on land and suggests adaptability for offshore use with minor modifications.

The potential height of wooden towers could reach 1,500 meters, although current demand is in the range of 150-200 meters.

a comparative analysis of emissions from steel and wooden wind towers

In the realm of wind energy, the environmental footprint of steel and wooden wind towers differs significantly. According to Modvion, the life cycle emissions of a 110-meter-tall steel wind turbine amount to approximately 1,250 tonnes of CO2. In contrast, a wooden tower slashes this figure by an impressive 90%, reducing emissions to around 125 tonnes.

Notably, the environmental benefits extend beyond the operational phase. When decommissioned, wooden towers find a second life as high-strength beams in the building industry, further diminishing their carbon footprint. Modvion envisions these towers as a form of "vertical storage" for future building materials.

The positive impact on wind power plants is substantial, with a claimed reduction of approximately 30% in emissions per kilowatt-hour (kWh) when utilizing wooden towers. To construct these towers, Modvion relies on 300 to 1,200 cubic meters of Scandinavian spruce sourced from sustainably managed forests, where re-growth surpasses logging activities.