Windmill from 5th Century

Windmill from 5th Century

AK (Ancient Greek) technology one of the foundations of wind mill technology started from 5th century, continuing the Roman period, and beyond. Inventions that are credited to the ancient Greeks include the gear, screw, rotary mills, water pumping techniques, water clock, water organ, Many of these inventions occurred late in the Greek period, often inspired by the need to improve weapons and tactics in war. However, peaceful uses are shown by their early development of the watermill, a device which pointed to further exploitation on a large scale under the Romans.

The wind wheel of the Greek engineer Heron of Alexandria in the first century is known instance of using a wind-driven wheel to power a machine. Which was used in ancient Tibet and China since the fourth century, it has been claimed that the Babylonian emperor Hammurabi planned to use wind power for his ambitious irrigation project in the 17th century BC.

Horizontal wind Mill

The first practical windmills had sails that rotated in a horizontal plane, around a vertical axis.

Vertical Wind Mill

Due to a lack of evidence, debate occurs among historians as to whether or not Middle Eastern horizontal windmills triggered the original development of European windmill

Post mill

Hollow-post mill

Tower mill

By the end of the 13th century, the masonry tower mill, on which only the cap is rotated rather than the whole body of the mill, had been introduced.

Smock mill

The smock mill is a later development of the tower mill, where the tower is replaced by a wooden framework, called the "smock." The smock is commonly of octagonal plan, though examples with more, or fewer, sides exist. The smock is thatched, boarded or covered by other materials, such as slate, sheet metal, or tar paper. The lighter construction in comparison to tower mills make smock mills practical as drainage mills as these often had to be built in areas with unstable subsoil. Having originated as a drainage mill, smock mills are also used for a variety of purposes. When used in a built-up area it is often placed on a masonry base to raise it above the surrounding buildings.

Machinery

Gears inside a windmill convey power from the rotary motion of the sails to a mechanical device

Wind Mill

A wind turbine is a windmill-like structure specifically developed to generate electricity. They can be seen as the next step in the developments of the windmill. The first wind turbines were built by the end of the 19th century by Prof James Blyth in Scotland (1887),Charles F. Brush in Cleveland, Ohio (1887–1888) and  in Denmark  (1890). La Cour's mill from 1896 later became the local power plant of the village Askov. By 1908, 72 wind-driven electric generators were in Denmark, ranging from 5 to 25 kW. By the 1930s, windmills were widely used to generate electricity on farms in the United States where distribution systems had not yet been installed, built by companies. such as Jacobs Wind, Wincharger, Miller Airlite, Universal Aeroelectric, Paris-Dunn, Airline, and Wind power, and by the Dunlite Corporation for similar locations in Australia. Forerunners of modern horizontal-axis utility-scale wind generators were the WIME-3D in service in Balaklava USSR from 1931 until 1942, a 100-kW generator on a 30-m (100-ft ) tower,  the Smith-Putnam wind turbine built in 1941 on the mountain known as Grandpa's Knob in Castleton, Vermont, USA of 1.25 MW and the NASA wind turbines developed from 1974 through the mid-1980s. The development of these 13 experimental wind turbines pioneered many of the wind turbines design technologies in use today, including: steel tube towers, variable-speed generators, composite blade materials, and partial-span pitch control, as well as aerodynamic, structural, and acoustic engineering design capabilities. The modern wind power industry began in 1979 with the serial production of wind turbines by Danish manufacturers Kuriant, Vestas, and Bonus. These early turbines were small by today's standards, with capacities of 20–30 kW each. Since then, they have increased greatly in size, with the Enercon E-126 capable of delivering up to 7 MW, while wind turbine production has expanded to many countries.

As the 21st century began, rising concerns over energy security, global warming, and eventual fossil fuel depletion led to an expansion of interest in all available forms of renewable energy. Worldwide, many thousands of wind turbines are now operating, with a total nameplate capacity of 194,400 MW. Europe accounted for 48% of the total in 2009.

Blade Less Wind Turbines:

Blade Less WEG(Wind Energy Generator) models and working process  recently published a news letter . we will waiting for further details