Wind is the natural movement of air across the land or sea. Wind is caused by uneven heating and cooling of the earth's surface and by the earth's rotation. Land and water areas absorb and release different amount of heat received from the sun. As warm air rises, cooler air rushes in to take its place, causing local winds. The rotation of the earth changes the direction of the flow of air.
A country like India or any region where energy production is based on imported coal or oil will become more self-sufficient by using alternatives such as wind power. Electricity produced from the wind produces no CO2 emissions and therefore does not contribute to the greenhouse effect. Wind energy is relatively labour intensive and thus creates many jobs. In remote areas or areas with a weak grid, wind energy can be used for charging batteries or can be combined with a diesel engine to save fuel whenever wind is available. At windy sites the price of electricity, measured in Rs/kWh, is competitive with the production price from more conventional methods, for example coal fired power plants.
The pollution saving from a WEG having an average output of 4,00,0.00 kWh per year has been estimated as:
|Availability||Usable as it exists||Have to be procured and made usable through laborious and environmentally damaging processes|
|Limitation on availability||Inexhaustible resource||Limited in reserves, expected to get completely exhausted in the coming 60 years|
|Transportation||Used where it is available||Have to be transported from the site for further processing exposing environment to danger|
|Use in production||Zero emission||Used in producing electricity releasing green house gasses|
|Geo-political Implications||Reduces our reliance on oil, safeguarding national security||Over-reliance on oil as a resource has undermined our energy security. E.g. OPEC crises of 1973, Gulf War of 1991 and Iraq War of 2003|
|There is no adverse effect on global environment. The whole system is pollution free and environment friendly.|
Source : National Institute of Wind Energy
Last Modified : 3/2/2020
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