Renewable energy essay pdf
Electromagnetic radiation from the sun is the non-conventional source of renewable energy that generates electricity. It can be photovoltaic or solar thermal, and is obtained by means of panels and mirrors. When solar panels absorb radiation, the energy converted is directly proportional to the intensity and duration of the sun’s rays which, by an effect called photoelectric, absorb light particles and release electrons. In the case of solar thermal collectors, the mirrors serve to absorb and concentrate the solar heat that is transferred to a fluid to be conducted through pipes for its use.
The movement of air masses, another non-conventional source of renewable energy, is the force that converts mechanical energy into electrical energy when the blades of wind turbines drive a turbine that is attached to an electric generator.
This non-conventional source of renewable energy includes natural marine phenomena such as tides, waves, ocean currents, ocean thermal gradients and salinity gradients, among others, to transform mechanical energy into electrical energy.
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The so-called renewable energy sources (sun, wind and water), are those that can be used permanently because they are inexhaustible, unlike non-renewable sources (oil or coal).Tags: From an environmental point of view, we can speak of the existence of two types of energy sources: renewable and non-renewable.
Among the types of renewable or non-depletable energy sources are: solar energy, wind energy, hydroelectric energy, biomass and biofuels, geothermal energy and energy generated by waves, tides and ocean currents.
It is the energy obtained directly from the sun (which is, at the same time, the source of all renewable energies). Depending on the mechanism used, heat or electricity can be obtained.
Low-power wind power installations (as well as photovoltaic solar energy installations) enable any consumer to generate his own electricity, i.e. to generate his own electricity.
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The process begins when sunlight falls on one of the faces of a photoelectric cell, which make up the solar panels, and an electrical potential differential is produced between the two faces causing electrons to jump from one place to another, thus generating electric current that is then transported to the distribution network to reach the points of consumption.
In addition to not emitting polluting or greenhouse gases during energy production, one of the main advantages of this technology is that it is modular. That is, the panels can be used for self-consumption (supplying electricity to homes or buildings) or also to supply the grid through large power plants, as in the case of our Rubí Solar Power Plant. Find more information about this power plant here.
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Renewable or clean energy is obtained from natural sources such as wind or water, among others; and non-renewable energy comes from nuclear or fossil fuels such as oil, natural gas or coal.
Given the comparison, choosing one type or the other is not very complicated: renewable energies are presented as the great solution to the future of the earth since they are generated with infinite materials found in nature and are easily regenerated.
Moreover, producing them is much less polluting than in the case of non-renewable energies although, due to their low popularity, they are still more expensive to produce and require large-scale installations that can affect natural ecosystems if they do not operate correctly.
Even so, renewable energies, besides being the clean and inexhaustible option, are autochthonous, do not leave residues and their carbon footprint is reduced; while non-renewable energies, polluting and limited, are not very sustainable in the use of technologies and have complicated production processes that involve many external factors.