What Is Renewable Energy?
Sources of supply that are environmentally friendly. This does not mean they do not cause negative effects on the environment, but they are infinitely less when compared to the environmental impacts of conventional energy (fossil fuels: oil, gas and coal, nuclear energy, etc..) And they are almost always reversible.
According to a study on 'Environmental Impacts of Electricity Production' environmental impact on the generation of electricity from conventional energy is 31 times that of renewable energy.
As important environmental benefits can not emphasize the emission of gaseous pollutants such as those resulting from the combustion of fossil fuels responsible for global warming (CO2) and acid rain (SO2 and NOx) and non-hazardous waste generation of hard treatment and during generation involving a threat to the environment as radioactive waste associated with the use of nuclear power.
Other noted benefits of renewable energy is its contribution to regional balance, and that can be installed in rural and remote areas, and reduced dependence on external supplies because renewables are indigenous, while fossil fuels only found in a limited number of countries.
The sun is the source of all renewable energy On Earth causes pressure differences that give rise to the winds: wind energy source. Order of the water cycle, evaporation causes leading to the formation of clouds and thus rainfall: source of hydropower.
Served for plant life and growth: a source of biomass. It is the direct source of solar energy, both thermal and photovoltaic. One of the most competitive renewable energy is the wind Wind energy is derived from the differential heating of the atmosphere by the sun, and irregularities of the surface. Although only a small part of the solar energy reaching the earth is converted into kinetic energy of the wind, the total amount is huge.
With the help of wind turbines or wind generators we can convert wind power into electricity. They have many different uses and can meet demands of low power (water pumping, rural electrification, etc..) Or together to form wind farms connected to the mains.
For centuries the wind has moved the blades of the windmills used to grind grain or pump water. Thus, after centuries of technical improvements, wind power is currently one of the most competitive renewable energy. Solar energy Solar energy is based on the utilization of solar radiation to produce energy that we can use directly as heat or we can convert into electricity.
Heat: solar thermal energy involves the use of radiation from the sun to produce hot water for domestic or industrial consumption, pool heating, heat our homes, hotels, schools, factories, etc..
Electricity: Photovoltaic solar energy into electricity allows sunlight through photovoltaic cells or solar panels. The electricity produced can be used directly (for example to draw water from a well or water by an electric motor), or be stored in batteries for use in the night hours.
It is even possible to inject the excess electricity to the national grid, obtaining a significant benefit. Photovoltaic solar energy has many applications.
Operation of small consumer devices, calculators, watches, etc..
Electrification of houses or isolated villages.
Land and maritime signals.
Communications or public lighting.
This year, the sun shed upon the earth four thousand times more energy than we consume.
Hydropower Hydropower comes from the 'water cycle', generated by the Sun, by evaporating the waters of the seas, lakes, etc.. This water falls as rain and snow on Earth and returns to the sea, where the cycle restarts. Hydraulic power is obtained from the potential energy associated with waterfalls and the height difference between two points in a river.
Hydroelectric power transformed into movement of the turbines which is generated by precipitating a water mass between two points at different heights and thus at high speed. There are different types of hydropower plants according to their size.
Large hydro. Mini hydraulic power stations or mini. These regulators do not require large reservoirs and hence its environmental impact is much lower.
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By Imrie Saladin