Renewable energy is an energy generated from the natural sources. It includes wind, solar, tides and geothermal energy. This kind of energy is pollutant free and environmental friendly. The rapid decline of non renewable energies like petroleum, coal and natural gas have made us look for better energy sources. The renewable energy is fast growing industry with an investment capital of over $100 billion in 2006. There are different kinds of renewable energies. This article gives a brief idea of each of the resources.
Wind energy
Wind energy can be used to run the turbines to produce electricity. Their lots of wind farms located over the world to generate electricity up to 5MW. The output of the turbine depends on the speed of the wind, the higher the speed the more the electricity that is produced. So these windmills are set up in those places with high wind speed like mountain tops or sea coasts.
Water power
Energy from the water can be derived in many ways. They are through salinity gradient, kinetic energy of water, temperature difference. The moving water in the river is used to rotate turbines to produce electricity. These can be done by constructing hydro electric dams. Water is made to fall from a height at a high pressure to give a high kinetic energy.
Solar energy
Solar energy is the energy produced from the sun. The rays of the sun are made to fall on solar panel to generate electricity. The output of the power depends on the amount of sunlight concentration and the composition of the solar panel. This energy is growing at high pace becoming popular with lot of households. The energy of the sun can be used to heat water in the homes using solar water heater or even cook food with solar cooker.
Did you know that you can easily start using renewable energy sources yourself? Simply build your own windmill or solar panels, and you are done! Click here for step-by-step instructions and more info.
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