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Non-Conventional Sources of Energy


Posted Date: 18-May-2008  Last Updated:   Category: Education    
Author: Member Level: Silver    Points: 3



Following are the six main non-conventional sources of energy, namely, solar energy, wind energy, biomass energy, geothermal energy, tidal energy and hydro power.

Solar Energy:

Solar energy is light and heat energy from the sun. Solar cells convert sunlight into electrical energy. Thermal collectors convert sunlight into heat energy. Solar technologies are used in watches, calculators, water pumps, space satellites, for heating water, and supplying clean electricity to the power grid. There is enough solar radiation striking the surface of the earth, to provide all of our energy needs.

Wind Energy :

Moving air, turns the blades of large windmills or generators to make electricity, or to pump water out of the ground. A high wind speed is needed to power wind generators effectively. While wind generators don’t produce any greenhouse gas emissions, they may cause vibrations, noise and visual pollution.

Biomass Energy:

Biomass is material of plants and animals that can be used for energy. This includes using wood from trees, waste from plants and manure from livestock. Biomass can be used to generate electricity, light, heat, motion and fuel. Converting biomass energy into useable energy has many environmental benefits. It uses waste materials that are usually dumped, and uses up methane (a greenhouse gas). Fuels such as ethanol can be made from biomass and used as an alternative to petrol to power motor cars.

Geothermal Energy:

Geothermal energy uses heat energy from beneath the surface of the earth. Some of this heat finds its way to the surface in the form of hot springs or geysers. Other schemes tap the heat energy by pumping water through hot dry rocks several kilometres beneath the earth’s surface. Geothermal energy is used for the generation of electricity and for space and water heating in a small number of countries.

Tidal Energy:

If a dam or barrage is built across a river mouth or inlet, electricity can be obtained by the flow of water through turbines in the dam, due to the tide. The movement of waves can also drive air turbines to make electricity. Although tidal and wave energy don’t produce pollution, they can cause other environmental problems.

Hydro Power:

Fast-flowing water released from dams in mountainous areas can turn water turbines to produce electricity. While it doesn’t cause pollution, there are many other environmental impacts to consider. Ecosystems may be destroyed, cultural sites may be flooded and sometimes people need to be resettled. There are also impacts on fish breeding, loss of wildlife habitat and changes in water flow of rivers.


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Responses to "Non-Conventional Sources of Energy"
Guest Author: Vijaya Lakshmi     10 May 2013
Here I got the detail about non conventional sources of energy - very well written, thanks for this site.


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