A windmill is a structure that converts wind power into rotational energy using vanes called sails or blades, by tradition specifically to mill grain (gristmills), but in some parts of the English-speaking world, the term has also been extended to encompass windpumps, wind turbines, and other applications. The term wind engine is also sometimes used to describe such devices.
A windpump is a wind-driven device which is used for pumping water.
Wind power is the use of wind energy to generate useful work. Historically, wind power was used by sails, windmills and windpumps, but today it is mostly used to generate electricity. This article deals only with wind power for electricity generation. Today, wind power is generated almost completely with wind turbines, generally grouped into wind farms and connected to the electrical grid.
A wind farm or wind park, also called a wind power station or wind power plant, is a group of wind turbines in the same location used to produce electricity. Wind farms vary in size from a small number of turbines to several hundred wind turbines covering an extensive area. Wind farms can be either onshore or offshore.
Wind power has been used as long as humans have put sails into the wind. Wind-powered machines used to grind grain and pump water — the windmill and wind pump — were developed in what is now Iran, Afghanistan, and Pakistan by the 9th century. Wind power was widely available and not confined to the banks of fast-flowing streams, or later, requiring sources of fuel. Wind-powered pumps drained the polders of the Netherlands, and in arid regions such as the American midwest or the Australian outback, wind pumps provided water for livestock and steam engines.
Greater Gabbard is a 504 MW wind farm, built on sandbanks 23 kilometres (14 mi) off the coast of Suffolk in England at a cost of £1.5 billion. It was completed on 7 September 2012 with all of the Siemens SWT3.6–107 turbines connected. Developed as a joint venture between Airtricity and Fluor, it is now jointly owned by SSE Renewables and RWE.
The Altamont Pass wind farm is located in the Altamont Pass of the Diablo Range in Northern California. It is one of the earliest wind farms in the United States. The first wind turbines were placed on the Altamont in the early 1980s by Fayette Manufacturing Corporation, on land owned by cattle rancher Joe Jess. The wind farm is composed of 4,930 relatively small wind turbines of various types, making it at one time the largest wind farm in the world in terms of capacity.
The Tehachapi Pass wind farm is one of the first large-scale wind farms installed in the U.S., with around 710 megawatts (950,000 hp) produced by about 3400 wind turbines.
The San Gorgonio Pass wind farm is a wind farm that stretches from the eastern slope of the San Gorgonio Pass, near Cabazon, to North Palm Springs, on the western end of the Coachella Valley, in Riverside County, California. Flanked by Mount San Gorgonio and the Transverse Ranges to the North, and Mount San Jacinto and the Peninsular Ranges to the South, the San Gorgonio Pass is a transitional zone from a Mediterranean climate west of the pass, to a Desert climate east of the pass. This makes the pass area one of the most consistently windy places in the United States.
Wind power is a branch of the energy industry that has expanded quickly in the United States over the last several years. From January through December 2023, 425.2 terawatt-hours were generated by wind power, or 10.18% of electricity in the United States. The average wind turbine generates enough electricity in 46 minutes to power the average American home for one month. In 2019, wind power surpassed hydroelectric power as the largest renewable energy source in the U.S.
Wind power generation capacity in India has significantly increased in recent years. As of 31 March 2024, the total installed wind power capacity was 45.887 gigawatts (GW). India has the fourth largest installed wind power capacity in the world. Wind power capacity is mainly spread across the southern, western, and northwestern states. The onshore wind power potential of India was assessed at 132 GW with minimum 32% CUF at 120 m above the local ground level.
Wind power is the fastest-growing renewable energy technology in Scotland, with 11,482 megawatts (MW) of installed wind power capacity by Q1 2023. This included 9,316 MW from onshore wind in Scotland and 2,166 MW of offshore wind generators.
The environmental impact of electricity generation from wind power is minor when compared to that of fossil fuel power. Wind turbines have some of the lowest global warming potential per unit of electricity generated: far less greenhouse gas is emitted than for the average unit of electricity, so wind power helps limit climate change. Wind power consumes no fuel, and emits no air pollution, unlike fossil fuel power sources. The energy consumed to manufacture and transport the materials used to build a wind power plant is equal to the new energy produced by the plant within a few months.
Carno is a wind farm of 68 turbines which started operation in October 1996. It covers an area of over 600 hectares on Trannon Moor, a plateau to the west of the village of Carno in Powys, Mid Wales, 400 metres (1,300 ft) above sea level.
A wind turbine is a device that converts the kinetic energy of wind into electrical energy. As of 2020, hundreds of thousands of large turbines, in installations known as wind farms, were generating over 650 gigawatts of power, with 60 GW added each year. Wind turbines are an increasingly important source of intermittent renewable energy, and are used in many countries to lower energy costs and reduce reliance on fossil fuels. One study claimed that, as of 2009, wind had the "lowest relative greenhouse gas emissions, the least water consumption demands and the most favorable social impacts" compared to photovoltaic, hydro, geothermal, coal and gas energy sources.
James G.P. Dehlsen is an American businessman, inventor, and entrepreneur. He is a pioneering figure in wind power and renewable energy development in the United States and holds 25 patents.
Wind power in New Jersey is in the early stages of development. New Jersey has just six wind turbines, but the state has plans to develop several major offshore wind projects on the continental shelf of the Atlantic Ocean off the southern Jersey Shore. Legislation has been enacted to support the industry through economic incentives and to permit wind turbines on existing piers.
The wind lens is a modification on the wind turbine created by Professor Ohya from the Kyushu University as an attempt to be more efficient in production of electricity and less invasive to both humans and nature. While still in progress, the wind lens has a few changes in design which have led to impacts on how wind energy can be used and harnessed while changing how it impacts the world around us. A wind lens works like a ducted fan on an aircraft - it encircles the wind turbine, and speeds air up while protecting the blades from foreign object damage. Because of this, wind turbine efficiency can be drastically increased because of a simple installation of a wind lens.
The following outline is provided as an overview of and topical guide to wind energy:
Wind power in Tennessee has most potential in East Tennessee along the North Carolina border. The state has not passed renewable portfolio standard legislation and there is just one utility-scale wind farm with 15 operating turbines and previously 3 test turbines. The Tennessee Valley Authority (TVA), based in Knoxville, imports wind-generated electricity into its service area which includes Tennessee. US Senator Lamar Alexander from Tennessee is an outspoken critic of wind power.
