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| Concept : Principle &
Mechanism |
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| Concept of Wind |
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Winds on earth are
caused primarily by unequal heating of land and
water by the sun. The differences in temperature
induce circulation of air from one zone to another.
This air in motion is called wind. Wind has been recognized
as a force of nature, ever since the
planet came into existence. Human civilization has
been harnessing the force of wind from time
immemorial. However, the harnessing of wind energy
for power generation commercially started only in
the early 1970s and has continued to grow since
then. Wind energy is now recognized as one of the
low investment high-yield sources of power
generation. Fortunately, India has abundantly been
blessed by Mother Nature in this respect.
The prominent features of wind climatology in India
are the monsoon circulations. Winds in India are
influenced by the strong South-West summer monsoon,
which starts in May-June, when cool, humid air moves
towards the land and the weaker North-East winter
monsoon, which starts in October, when cool, dry air
moves towards the Ocean.
During the period March to August, the winds are
uniformly strong over the whole Indian peninsula,
except the eastern peninsula coast. Wind speed
during the period November to March is relatively
weaker, though stronger winds cannot be ruled out
during a part of this period on the Tamil Nadu coast
line in South India.
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