Windmills were used in sec. al-sixth century in Persia (now Iran). Unlike the guy who later became widespread in the West, these windmills were sailing a vertical shaft which rotates on the horizontal supports. Mill stones to grind grains lower end of the shaft to get flour. The first mention of windmills in Europe refers to the one in Bury St. Edmunds in Suffolk, England.
The first windmills in Europe were dying pole type. Sails revolved in a plane nearly vertical wind mill and the body was mounted on a central pit. A long lever, lever called back, back to extending. When wind direction changes, press the lever back miller to mill wheel facing the wind again. With time millers have found ways to use the mill for other purposes, such as lifting bags of grain. The Dutch began using windmills to drain water from the field. A system consists of a windmill to operate a facility like a water wheel, which made water. The main disadvantage of windmills is that unlike water wheels, ALA can not be used if needed energy continue: if the wind stops, and the mechanism stops.

Wind pumps:

Windmills are still used now in some territory for grinding grain. Multiple vane pumps, driven by wind, are used to obtain water from wells in more remote regions, especially in Australia and South Africa. Pumped water is stored in a nearby tower. Although usually are called windmills, these mechanisms are called wind machines and wind pumps. A typical wind pump wheel has a diameter of between 3-4 meters, with about 20 blades of pressed steel. The wheel is mechanically mounted on a pole with a height of about 8 meters. Vertical wind drift force on a rear wheel facing the wind keeps. But drifting is designed to turn the wheel when the wind is extremely strong mechanism to prevent damage.
Wind pumps removing water from wells: rotating blades is converted into an up-down motion to operate the pump
Unlike most wind turbines of the Darrieus type vertical axis wind change does not require adjustment
Wind power causes no air pollution or water. But many wind turbines are needed to produce the energy of a traditional power plants and some object to their appearance.

Wind generators:

Many people prefer to generate electricity from wind power because it is a clean process and uses no fuel. In some parts of Wales, Scotland and North America experienced a wind turbine works, connected to electricity generators. It takes a motor diameter of 50 meters to generate 1MW of energy, so these 1000 wind generators could equal the capacity of a power plant. In some countries or build “wind farms”, which consist of fields of wind generators, but the public might object if the appearance of parts would be affected. For this reason, large-scale wind energy future is uncertain. But small wind generators provide an infinite path Recharge the batteries in the remote areas without mains supply.
A number of catuste – mechanisms that absorb wave energy to convert into electricity. Transformation can be done in several ways. Movement of an act catuste pump. This pushes the water through a turbine, which actoineaza a generator to produce electricity. In “catusca Salter’s” named after the inventor Stephen Salter, the edge goes up and down mechanism absorbs energy while the surf. As a result there is a movement back and forth rotation around the axis seufundat. A double acting dynamo transform this movement into electricity, so energy is generated in both races in the downward ascendentecat. This mode of presentation shows that almost all the energy of a wave is absorbed by the duck, on the other side the water remained calm.

Water Wheels:

Were denied. I en, it originally used for grinding grain. Water flow and the movement was acting wheel used to grind grain between two millstones. Approximately 1000 years later people began to exploit the water power for other processes leading to the development of industries along the valleys. A device attached to the wheel under water energy can be used to operate all heavy hammers and saws. The first processing of iron and textile industries rely on water power, it continued until the introduction of reliable steam engines in the late 1700s. Currently, old-type water wheels are kept for their historical value, but their modern equivalent – water turbine – is widely used to provide the energy needed to generate electricity shareholders immense hydroelectric networks. Some countries such as Norway, produces most of the electricity in this way.

Wave energy:

Another major source of water are waves of energy. The immense ocean waves carries huge amounts of energy but this energy is difficult to operate efficiently and inexpensively. Various schemes are tested experienced. In a scheme called rafts some “ducks up and down the passage valurulor. This movement operates a pump that pushes water through a turbine that drives a generator.
A new scheme for wave energy experienced by the island Islay, off the coast of west Scotland has been designed to generate 180 KW of electricity. It works on the principle of oscillating water column. A sunken room, open bottom, contains a column of air above the water. With the passing wave, the water column up and down, pushing and releasing air in a turbine connected to an electricity generator.