Wind Power

Wind turbines explained

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.

Wind energy is categorized into land-based, distributed, and offshore types

Distributed wind turbines efficiently serve on-site energy needs, while land-based turbines 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 or built to float above water at scales larger than the Statue of Liberty.

From 1990 to 2020, wind turbine height and blade length have more than tripled

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.

See technicians use rappelling gear to make wind turbine repairs from 35+ stories up

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.

Maintenance, curtailment, congestion, and wind speed can park a wind turbine

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.

Explore an interactive graphic of a wind turbine's components

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.

Wind turbines are limited to capturing no more than 59.3% of incoming wind energy

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.

Window collisions and cats kill more birds than wind turbine farms

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%.

Offshore wind turbines are built like giant modular puzzles at sea

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.

Technological advancements will make future wind turbines more efficient and quieter

Manufacturing larger, more powerful turbines will result in future wind farms requiring fewer of them to meet energy demands. Larger turbines will meet these demands while rotating at lower speeds, reducing risks to avian wildlife.