Wind energy is one of the fastest growing sources of renewable energy. As countries look to reduce reliance on fossil fuels and curb greenhouse gas emissions, investment in wind power has expanded dramatically in recent decades. A key enabling technology behind this wind energy boom has been the use of advanced composite materials in wind turbine construction. Used extensively in blades, towers, and other components, composites allow for lighter, stronger, and more durable wind turbine designs. Let's take a closer look at how different composite materials are utilized across modern wind power systems.

Composite Materials in Wind Turbine Composites

The long, sweeping blades of a Wind Turbine Composites are one of the most iconic elements of these towering structures. Modern multi-megawatt turbines can have blades over 100 meters long, so constructing them using durable, lightweight materials is essential. The overwhelming material of choice for blades is a composite made from fibreglass reinforced plastics (FRP). Two main types of FRP are used - glass-fibre reinforced plastic which uses glass fibres set in an epoxy, vinyl ester or polyester matrix, and carbon-fibre reinforced plastic which uses carbon fibre instead.

Carbon fibre composites are increasingly used in the outer sections of blades where strength is paramount. They offer high stiffness and tensile strength combined with low weight. Glass fibre is generally used in the inner sections where cost is a bigger factor. Epoxy or vinyl ester resins are common matrix materials since they provide corrosion and weather resistance under harsh wind turbine operating environments. Special bonding and coating systems are applied to protect blades from sunlight damage as well. Overall, FRP composites allow for blades that are immensely strong yet remarkably lightweight, a critical advantage enabling tall towers and rotors.

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