What is a Wind
wind turbine is a device that converts
kinetic energy from the wind into mechanical
energy; a process known as wind power. If
the mechanical energy is used to produce
electricity, the device may be called a wind
generator or wind charger. If the mechanical
energy is used to drive machinery, such as
for grinding grain or pumping water, the
device is called a windmill or wind pump.
Basic Types of
Horizontal-axis wind turbines (HAWT) have
the main rotor shaft and electrical
generator at the top of a tower, and must be
pointed into the wind. Small turbines are
pointed by a simple wind vane, while large
turbines generally use a wind sensor coupled
with a servo motor. Most have a gearbox,
which turns the slow rotation of the blades
into a quicker rotation that is more
suitable to drive an electrical generator.
Vertical-axis wind turbines (or VAWTs) have
the main rotor shaft arranged vertically.
Key advantages of this arrangement are that
the turbine does not need to be pointed into
the wind to be effective. This is an
advantage on sites where the wind direction
is highly variable, for example when
integrated into buildings.
When a turbine is mounted on a rooftop, the
building generally redirects wind over the
roof and this can double the wind speed at
the turbine. If the height of the rooftop
mounted turbine tower is approximately 50%
of the building height, this is near the
optimum for maximum wind energy and minimum
impact of wind power
to the environmental impact of traditional
energy sources, the environmental impact of
wind power is relatively minor. Wind power
consumes no fuel, and emits no air
pollution, unlike fossil fuel power sources.
Dioxide Emissions and Pollution:
Wind power consumes no fuel and no water for
continuing operation, and has no emissions
directly related to electricity production.
Wind turbines produce no air pollution,
unlike fossil fuel power sources. Wind power
plants consume resources in manufacturing
Any practical large-scale energy source must
replace the energy used in its construction.
The energy return on investment (EROI) for
wind energy is equal to the cumulative
electricity generated divided by the
cumulative primary energy required to build
and maintain a turbine. For off shore wind
turbines that is generally 9 months.
In the United
States, landowners typically receive $3,000
to $5,000 per year in rental income from
each wind turbine, while farmers continue to
grow crops or graze cattle up to the foot of
at IZA will not only help you discover the
benefits behind Wind Turbines but will
discuss if this technology is right for your