What is a wind turbine?

Wind turbine is a large rotating device that converts wind energy into mechanical energy. This mechanical energy can then be used for simple mechanical tasks, such as turning large wheels to crush the grain, in which case the wind turbine is referred to as a windmill. It can also be used as a source of electricity, whether for nearby application or after the transfer of high -level guidance to the central switching station, in which case it is referred to as the wind generator.

Wind turbine has been used for centuries in the form of windmills. Many parts of the world still use turbines extensively to grind grain and pump water. Windmills allow people without access to electric pumps to get water from deep below groundwater, help ensure access to clean water and protect from water -transmitted diseases.E World. In global move from fossil fuel energy to more sustainable forms of energy, wind energy has become an important player. It's relativelyAvailable, it can be used in many different regions of the world and can be quite effective. Although there are some environmental concerns about wind generators, they are generally smaller and more than 120 gigawatts (GW) electricity are produced worldwide by wind energy.

The turbines themselves can be divided into two different groups: the horizontal axis of the wind turbine (HAWT) and vertical wind turbines (VAWT). Most turbines that people are used to see are Hawts, based on the well -known design of windmills. Modern Hawts are generally three leaves, at the top of huge towers that bring them to an altitude where the wind cut is much higher.

Most Hawts are controlled by computer to automatically turn to the wind so that the bridge of any wind is present. Hawts do not require any type of backward tracking because their blades always move perpendicular to the wind. As a result, all the time the turn of theThey produce electricity, unlike Vawts. However, transport is incredibly expensive because they are huge and it is common for 20% of the total cost to be spent only on transport. In addition, their height can cause aesthetically resentment and installation to be a difficult, costly and time -consuming process.

The wind turbine vertical axis (VAWT) on the other side has a rotator shaft glued directly into the air, with foils that capture the wind and turn the entire shaft. The most common type that is visible is the wind turbine Darrieus, which looks roughly like a large egg. Vawts require much less height and are much less expensive for transport and installation and are able to produce electricity with much slower wind speeds than Hawts. Their overall efficiency is a roughhawts, however, LY 50% and because they are lower to the ground, they tend to experience much lower wind speed.

In addition to the two main types of wind turbines, which make up the vast majority of turbines in the world, there are also a number of non -standardh designs. These are changes to Hawts or Vawts such as Aerogenerator or Turbine with a rotor turbine. Foreign variants, such as the wind turbine of magnetic levitation and a air wind turbine, have also been designed and in some cases experimented. However, most alternative designs have not yet seen widespread commercial acceptance.