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1. WIND ENERGY
WINDMILL

2. WIND ENERGY
• Wind energy is a form of solar energy.
• Wind energy (or wind power)
describes the process by which wind is
used to generate electricity.
• Wind is caused by the uneven heating
of the atmosphere by the sun,
variations in the earth's surface, and
rotation of the earth.
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3. WINDMILL
• A windmill is a structure used to harness the
power of the wind for purposes like grinding
grain, pumping water, and generating electricity.
• The power of the wind was first harnessed by
sailors, who were able to understand lift and
harness the winds power through sails. This
knowledge led to the development of the first
vertical axis sail-type windmill used by the ancient
Persians and Chinese for grinding grain and
pumping water.
• They consisted of vanes called sails or blades that
when prompted to turn by the wind, converted
the wind’s energy into rotational energy that
could be utilized.
• Early European windmills with horizontal axis
systems were the foundation for current wind
turbine technology used for energy production.
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4. FR
Advantages
• The advantages of wind energy are more apparent
than the disadvantages. The main advantages
include an unlimited, free, renewable resource (the
wind itself), economic value, maintenance cost, and
placement of wind harvesting facilities.
• Wind is a natural occurrence and harvesting the
kinetic energy of wind doesn't affect currents or
wind cycles in any way.
• Harvesting wind power is a clean, non-polluting way
to generate electricity. Unlike other types of power
plants, it emits no air pollutants or greenhouse
gases.
• Wind energy is far more ecofriendly than the
burning of fossil fuels for electricity.
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5. FR
Disadvantages
• Disadvantages of wind power include initial cost and
technology immaturity. Constructing turbines and
wind facilities is extremely expensive.
• Wildlife: Wind turbines may be dangerous to flying
animals. Many birds and bats have been killed by
flying into the rotors. Experts are now conducting
research to learn more about the effects that wind
turbines have on marine habitats.
• Remoteness of location: Although this may be an
advantage (placing wind turbines in desolate areas,
far away from people), it may also be a
disadvantage. The cost of travel and maintenance
on the turbines increases and is time consuming.
Offshore wind turbines require boats and can be
dangerous to manage.
• Noise: Some wind turbines tend to generate a lot of
noise which can be unpleasant
• Safety at Sea: In the darkness/at night it may be
difficult for incoming boats to see wind turbines
thus leading to collisions. 5

6. THE PROCESS OF GENERATING POWER
BY USING WIND ENERGY
• When the wind blows past a wind
turbine, its blades capture the wind's
kinetic energy and rotate, turning it
into mechanical energy. This rotation
turns an internal shaft connected to a
gearbox, which increases the speed of
rotation by a factor of 100. That spins
a generator that produces electricity.
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7. THE POWER IT CAN GENERATE BY
USING WIND ENERGY
• A modern wind turbine begins to produce
electricity when wind speed reaches 6-9 miles per
hour (mph) and has to shut down if it exceeds 55
mph (88.5 kilometers per hour) when its
mechanism would be in danger of sustaining
damage.
• It is reckoned that an average onshore wind
turbine rated at 2.5 – 3 megawatts can produce in
excess of 6 million kWh every year. A 3.6 MW
offshore turbine may double that.
• Development included the 87MW first phase and
the 63MW second phase. The wind farm
generates approximately 370GWh of electricity a
year, which is used to power more than two
million households. It offsets approximately
200,000t of CO₂ emissions annually. 7

8. FR
THE ENERGY CONSERVATION
PROCESS
• To conserve wind energy is by using a generator
system that’s powered by wind turbines,
according to Wind Job. When the shaft is
connected to a generator, wind energy is
converted into mechanical energy, which causes
the generator to spin. As the generator spins,
electrical power or energy is created.
• Wind power that’s been harnessed can be
converted into a form of kinetic or mechanical
energy that’s used to power different types of
equipment.
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9. CALCULATION OF WIND POWER
• Equation for Wind Power
• P = {1over2} rho A V^3
• Wind speed .The amount of energy in the wind varies with the cube
of the wind speed, in other words, if the wind speed doubles, there
is eight times more energy in the wind ( 2^3 = 2 x 2 x 2 = 8). Small
changes in wind speed have a large impact on the amount of power
available in the wind.
• Density of the air. The more dense the air, the more energy received
by the turbine. Air density varies with elevation and temperature.
Air is less dense at higher elevations than at sea level, and warm air
is less dense than cold air. All else being equal, turbines will
produce more power at lower elevations and in locations with
cooler average temperatures.
• Swept area of the turbine. The larger the swept area (the size of the
area through which the rotor spins), the more power the turbine
can capture from the wind. Since swept area is A = pi r^2 , where r
= radius of the rotor, a small increase in blade length results in a
larger increase in the power available to the turbine.
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10. THE LOCAL PLACES THAT USES WIND
ENERGY
• Some of the most recent
developments are the Bangui Wind
Farm, Burgos Wind Farm, and
Caparispisan Wind Farm in Ilocos
Norte
• The Wind Energy Power System in
Oriental Mindoro, San Lorenzo Wind
Farm in Guimaras, Nabas Wind Farm in
Aklan and Pililla Wind Farm in Rizal.
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11. Submitted by: Girly Shane M.
Bau tista STE M -1 2 1 1
S u b mitted to: Jean V. Han d og