Wind Power

Wind turbines have powered homes since 1887, and today they’re stronger, quieter, and more reliable than ever. Offshore wind could power millions and grow fast enough to meet climate goals.

Turbines convert wind's kinetic energy into mechanical energy, which allows generators to create electricity. They are among the lowest-cost electricity sources and can be built to float above water at scales larger than the Statue of Liberty.

Wind turbines' energy generation capacity—or maximum power rating—also increased by 375% from 1998 to 2023. As of that year, wind turbines can produce more energy per dollar than solar panels, though transportation and installation challenges remain.

Although drones are used to conduct initial reviews from the ground, mechanical engineers trained in turbine maintenance face extreme risks during close inspections more than 150 meters off the ground.

Wind turbines are optimized to operate at wind speeds between about 10 and 80 kph, but an internal brake stops them if energy is not required. Routine preventative maintenance and cleaning also prevent blades from rotating.

Wind turbines contain a gearbox that increases the rotation of the blades by a factor of 100 from low to high-speed shafts. The latter moves magnets that change the magnetic field within a generator, creating electricity.

In 1919, German physicist Albert Betz applied the laws of conservation of mass and momentum to airstreams to calculate the theoretical limit. However, real-world turbines only convert 35 to 45% of available wind energy into electricity.

Researchers are developing solutions to reduce bird fatalities due to wind turbine farms, including radar systems integrating AI to detect birds and shut down systems. Painting blades with various patterns is also being tested, which may reduce bird strikes by 70%.

Due to their enormous size, turbines are assembled in parts on-site using prefab components, advanced cranes, and vibration-dampening systems to manage the dynamic ocean environment. Three-blade turbines became the norm because even-numbered blades create damaging vibrations.

Distributed wind turbines serve on-site energy needs efficiently, while land-based ones are large and generate cost-competitive electricity. Offshore wind turbines capture powerful winds above the ocean and may be pounded into the seafloor using pile drivers.