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Renewable Energy is energy based on resources that are regenerative or all practical purposes can not be depleted. Sources such the sun and the wind, can never be exhausted and for that reason called renewable. They cause fewer emissions and are avalable locally. Their use can, to a large extent, reduce chemical, radioactive and thermal pollution. They may be a viable way to obtain clean and limitless energy. These are the basic non-conventional sources of energy. Most of the renewable sources of energy are fairly non-polluting and considered clean aside from biomass, a renewable source, is a major polluter indoors.
Reasons for renewable energy or non-conventional energy will be the sun, wind, agricultural residue, firewood and animal dung. Energy generated from the sun is known as solar energy. Energy derived from water is named hydroelectricity. Biomass is firewood, animal dung, biodegradable waste from cities and crop residue. It might be a source of energy when it is burnt. Geothermal energy is energy produced from hot, dry rocks, magma, warm water springs and natural geysers. Ocean thermal is energy based on waves and tidal waves.
In terms of renewable energy, the most powerful and useful may be the sun. The sun is accessible from sunrise to sunset and produces an unimaginable level of energy each and everyday. What solar collectors do is to harness the energy from the sun in the form of radiation to become usable forms of energy for example heat and electricity, Solar cells in particular converts solar energy into electricity. With technology being so advanced, solar panels are taken to a new level. There are recreational vehicles, cell phones and cars.
Solar Heat
Solar heating systems depend on a source of bright light, a surface or liquid that can absorb light and a storage device for the resulting heat generated. A greenhouse is a great one of this effect. Solar heat is by far the cheapest and most practical kind of renewable energy in the world. Some practical uses are hot water heaters, ovens, cookers and home heating.
Green Living - Wind Energy
From times long, sometime ago, sailing ships been dependent on the energy of the wind to get across oceans. Likewise wind energy was also used to work windmills for pumping water. Today, wind power is being used as a clean electrical source around the world. Wind farms, as they are often called can provide enough electricity for a large number of homes at a time. The effectiveness of wind is used to show turbines, which in turn is linked to an electrical generator and the gearbox inside the generator converts the energy of the spinning turbine into electricity.
Water Power
Centuries ago, waterwheels were used to offer power for grain mills and lumber cutting. Hydroelectricity, because it is called today, produces over 60% of the electricity in Canada and 60% in america.
