As everyone surely knows, not all energy sources are available to us forever. In fact there are energy sources that are not renewable and their fate to run out over time to regenerate them are needed millions of years, that’s why you can not define “renewable.” Among them is the fuel of fossil type, il, coal and natural gas type , there is also the” fuel “that generates nuclear energy. Instead, when it comes to sources of renewable energy , there refers to all non-fossil sources of energy, such as solar, wind, water, the wave , geothermal and biomass, which are always played in a short time. This guide will talk about three very important sources of renewable energy : wind, solar and photovoltaic energy.

Wind energy has been used since ancient times, with it you can make use of simple systems and have excellent reliability. The wind is a source of energy inexhaustible, clean and free of charge. It has an irregular and its intensity can vary, therefore, to be able to obtain a “good” electricity, we need a very high speed of the rotation of the blades.

Composition of alternative energies:clean   energies from the nature.

The thermal systems with panels that ‘capture’ and exploit ‘solar energy can heat the water transporting and distributing it in the normal network. Are placed in the most exposed to the sun of a building (roof, terrace, garden) placing them at an incline (from 30 ° to 60 °), to “catch” the best rays. In homes, the plant with solar panels provides heating to heat the water of the various environments and any pool. Sometimes you can provide some 80% of the heat demand of the whole of the dwelling but since everything depends on the Sun, in this case it is necessary to integrate this thermal system ‘clean’ with a traditional system.

The solar thermal energy, is a type of energy that comes from the heat thus obtained thanks to the sun , it can be ‘captured’ in different ways and it is made ​​use of for different energy needs. A plant photovoltaic, consists of an electrical system that uses the sun’s energy could then transform solar energy into electricity latter can accumulate in batteries to be able to always have (giving rise to autonomous solar systems), or it can be immediately distributed to the user without the need of batteries.