Wind energy definition is the product of the conversion of the kinetic energy of wind into other forms of energy (typically electrical energy). Although there is no real definition with regard to small wind turbines, in general, we mean the installation of generators with powers up to 50kW-60kW for self-consumption of energy for small-medium electrical users, able to cover the needs of families or small-medium enterprises. Machines above 50-60kW up to 200kW are typically classified as “medium-wind”. A wind turbine is a combination of a wind turbine and an electric generator.
Man has always used the force of the wind throughout history: to move by boat, to operate the millstones for cereals and olives or even to irrigate the fields. In fact, the wind has a great potential: it is found everywhere, in an abundant and economic way, it has no negative repercussions on the environment and, above all, it is clean and does not produce greenhouse gases. Real alternative energy, green and clean, wind power has several applications. Today, wind energy is mainly used for the production of electricity that is then destined for daily or industrial use.
The support tower has a “gondola” at its top, consisting of an outer casing containing the transmission shaft, the speed multiplier (absent in some types of generators), the electric generator and auxiliary devices. At the end of the shaft is fixed the rotor, consisting of a hub, on which are mounted the blades (1, 2 or 3 with a diameter of 10 to 60 meters). The gondola is able to rotate with respect to the support in order to keep the axis of the machine always parallel to the wind direction. Appropriate cables convey the electrical energy produced to the ground and transmit the signals necessary for control.
Much of the energy that allows us to live comfortably is not infinite and is running out. Moreover, it often pollutes a lot. This is why we need renewable energies, that is, energies that do not end and do not pollute. Like wind power, created by the wind. Let’s discover it together! What would the world be like in the dark and without electricity? Do you know how the energy we consume every day is produced? And that there are sources of energy that will not run out because nature constantly renews them? And, above all, do you know that they have a low impact on our ecosystem?
Okay, but now enough with all these questions! Let’s find out together what we’re talking about when we talk about Renewable sources, what wind power is and how it can be used. Wind energy, as its name suggests (does Eolo, the god of the wind, mean anything to you?), is a type of energy derived from the force of the wind, which is converted into labour force (often in the form of electricity). Since ancient times, the flow of currents has been an ally of men to move (the sails inflated by the wind made it possible to navigate easily) or to move objects of production (the rotating blades of windmills, for example, moved the millstones to grind the grain and make flour). Only nowadays, however, has it been decided to use the force of the air to produce electricity.
Between the nineteenth and twentieth centuries, various scientists focused their studies on the exploitation of wind for energy purposes. The result of their studies is that today, most of the wind energy is produced by turbines and wind turbines. Renewable energy, the way to reduce the impact of pollution on the environment and not to damage the natural resources available to future generations. And while energy eco-sustainability is one of the hottest and most debated issues of recent decades, in reality the techniques for producing green energy have been known for a long time. Wind power, for example, is the first form of renewable energy discovered by man.
About wind energy
In recent decades the growth of wind power has been remarkable: technological improvements, in fact, have made possible the construction and maintenance of generators not only cheaper than in the past, but also more efficient and able to achieve higher yields even in the presence of less wind and air movements. And what is world position with respect to wind energy? Our world, a warm and welcoming territory that is definitely exposed to the wind, so much that wind power can represent a valid and viable energy alternative.