2. WHATIS WINDENERGY?
• Wind is a formof solar energy
.
• Winds are caused by the uneven heating of the atmosphere by
the sun, the irregularities of the earth's surface, and rotation of
the earth.
• Wind flow patterns are modified by the earth's terrain, bodies of
water, and vegetative cover.
3. WHYWINDENERGY?
Wind, for now
,istherenewableenergy
resource/technology of choice
“Free” resource
A“clean” resourcedueto:
Replacement of a“dirty” energy
source(coal) and,
Noemissions associated withits use
Canbeutilized onunderutilized landoron landscurrently in
commodity cropproduction (“harvest” onthesurfaceand
“harvest” abovethesurface)
5. WHEREDOESWINDCOMEFROM?
• The wind is a by-product of solar
energy.
• Approximately 2%of thesun's energy
reaching the earth is converted into
wind energy
.
• The surface of the earth heats and cools
unevenly, creating atmospheric
pressure zones that make air flow from
high- tolow-pressure areas
6. HOWISWINDCREATED?
• T
emperaturesvary
according to the amount of
sun it gets
• Uneven heating of the
Earth's atmosphere and
surface
• Balancebetweenwarm
and cool air is constantly
changing, creating wind.
7. WindEnergy
• The terms "wind energy" or "wind power"
describe the process by which the wind
is used to generate mechanical power or
electricity.
• Wind turbines convert the kinetic energy
of wind into mechanical power.
• Wind power is the conversion of wind
energy into a useful formof energy
, such
as using:
• wind turbines to make electricity
,
• windmills for mechanical power,
• Wind pumps for water pumping etc.
8. WINDENERGYCLASSIFICATION
W
ind energy classified in two types
Planetarywinds
Local winds.
Planetary winds are cause due to greater
heating of earth’s surface near the equator
as compared to solar heating near the south
&northpoles.
• Planetary winds are also known as global
winds
• They blow across the entire planet
• They generally blow at the same speed and
in the same direction
• Each hemisphere has 3 kinds of wind belts
that divides up the planetary winds namely,
Trade winds, westerlies and Easterlies
9. Local winds are caused due to differential heating of land &water in coastal areasthese are also
caused due to uneven heating in hills &mountain along the slopes.
10. HISTORYOFWINDPOWER
• Over3,000yearsago,theancient Egyptians usedwind power
to sail their ships on the Nile River. Later, people built windmills
to grind their grain.
• The Babylonians and Chinese used wind power to irrigate crops
as early as 4000 years ago.
• In 1891, the first electrical output wind machine was developed
incorporating the aerodynamic design principles
• now wehave even better ways to use wind energy like for a
power source.
11. Advantages and Disadvantages???
Advantages:
Don’tproduceatmospheric emissions that cause
acid rainsandgreenhouse effects.
The wind blows day and night, which allows
windmills to produce electricity throughout the
day.
Wind power is very low cost (after the initial
productionand installation)
Wind power is clean and renewableand
sustainableresource.
Wind energy is a domestic, renewable source
of energy that generates no pollution andhas
little environmentalimpact.
Land used for wind farms can also be used for
other profitable activities includingfarming and
forestry.
Remote areas that are not connected to the
electricity power grid can use wind turbines to
produce their own supply.
Disadvantages:
Dependingonhowenergeticawindsiteis,thewind
farmmayor maynotbecostcompetitive.
Windenergycannotbestored(unlessbatteriesare
used)
Goodwindsitesareoftenlocatedin remote
locations
NoiseDisturbances: Thoughwindenergyis non
pollution,theturbinesmay createa lot ofnoise.
ThreattoWildlife: Duetolargescaleconstructionof
windturbinesonremotelocation,it couldbea threat
towildlifenearby
.
Birdsarekilledbywindturbines.
