Wind energy means the extraction of kinetic energy of the wind for the production of mechanical or electrical energy.
During the day the air above the seas and the lakes remains colder than the air above the earth, mainly due to the fact that the water "absorbs" the solar heat in the lower layers. On the other hand the solar heat is largely reflected on the mainland and warms the air on the surface that expanding becomes light and tends to rise. Consequently the coldest and heaviest air that comes from the seas and oceans starts to move to take its place causing the surface winds. At night usually the opposite happens, the heat accumulated in the deep layers of the water makes the air above the mirrors of water that tend to rise, warmer and the air above the earth, colder because it is no longer irradiated by the sun, tends to take its place, so in the day you have the breeze to the mainland and at night you have the breeze towards the sea.
Another cause of displacement of air masses are the fluctuations of atmospheric pressure, for this effect the air is moved, on the ground, from areas with high atmospheric pressure towards areas of low pressure, with a speed proportional to the difference in pressure. Before installing a wind turbine it is suitable to perform anemometric surveys that give an overview of the wind characteristics at the exact point of installation, this study is carried out with devices called anemometer, from these data is also revealed which type of wind turbine is more suitable for the site in question. Wind turbines that always more frequently we see in our countrysides or mountains are made up of different components.
The rotor blades are generally manufactured with glass fiber and can rotate at a speed of up to 200 km / h pushed only by the wind. The motion of the rotor is transformed into electrical energy by the generator using the same principle as the dynamos built on the bicycles. The work that a wind turbine can perform depends on the rotor area and on the aerodynamic efficiency of the rotor.
The plants are distinguished in:
isolated systems (few wind turbines)
cluster systems ("Wind Farm") (wind turbines connected to a local network)
combined and integrated systems
The wind turbines are grouped by well-defined clustering techniques that are still continuously updated. The diffusion of wind energy allows the refinement of the wind turbine arrangement techniques to make them more and more optimal and effective to the morphological context of the territory.
It will however be important to ensure that the arrangement also takes into account the impact on the landscape. Especially in the case of large wind farms.
Finenergy realizes Miniwind systems up to 60 KwE at Pala. Even today, these systems enjoy state incentives and, in addition to produce a considerable amount of energy per year, are very convenient from the point of view of investments or self-production for adjacent sites.
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