Windmill Technology For Electricity Generation
Development of Windmill power began in 1952 in India. Windmill is a structure that converts the energy of wind into Rotational energy by means of vanes called sails or Blades. The majority of Windmills take the form of wind turbines used to generate electricity or wind pumps used to pump water either for land drainage or extract groundwater. From Netherland to USA farms, Windmills have been used for pumping water or grinding Grain.
Today, Windmills modern equivalent - A Wind Turbine - can use the wind's energy to generate electricity. Wind turbines are mounted on a tower to capture the most energy at 100 Ft. (30 meters)
or more above ground. They can take advantages of faster and less turbulent wind. Turbines catch the wind's energy with their propeller like Blades. Usually two or three Blades are mounted on a shaft to form a Rotor. A blade acts like an Airplane wing. When the wind blows, a pocket low-pressure air forms on downward side of the blade. The low- pressure Air pocket then pulls the blade toward it, causing the rotor to turn. This is caused lift. The force of the lift is actually much stronger than the wind's force against the front side of the blade, which is called Drag. The combination of Lift and Drag causes the Rotor to spin like a propeller and the and the turning shaft spins to generate to make electricity.
Horizontal Axis wind turbines have the main Rotor shaft and Electrical Generator at the top of a
tower and they must be pointed into the wind. Small turbines are pointed by a simple wind vane placed square with the Rotor (Blades) while large turbines generally use a wind sensor coupled
with a Servo motor. Most large wind turbines have a Gear Box, which turns the slow rotation of
the Rotor into a faster rotation that is more suitable to drive an electrical Generator. The output
of a wind turbine depends upon the turbine's size and wind speed through the Rotor. An average
on-shore wind turbine with a capacity of 2.5 - 3.0 MW can produce more than six million KWh
in a year -enough to supply 1500 households with electricity.
In India, the 'on-shore' potential for utilization of wind energy 65000 MWs. India is blessed with
7500 Kms. (app,) of coastline and its territorial waters extend up to 12 Nautical miles in the sea.
The unexploited resource availability has the potential to sustain the growth of wind energy sector
in India in the years to come. It empowers to address the need for a cheaper, non - polluting and environment friendly solution to power rural India also.
In India, minimum cost of installation works out to Rs. 1.00 crore for a 250 KW Wind Turbine.
An individual has to bring Rs.30-35 lakhs upfront and balance an be funded by bank loans. The output of a Wind turbine depends upon the turbine's size and wind speed through the Rotor. An average on shore wind turbine with a capacity of 2.5 - 3.0 MW can produce more than six million KWh in a year - enough to supply 1500 households with electricity.
I went to Germany recently and picked up the above pic gathered on the way from Belgium.
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Today, Windmills modern equivalent - A Wind Turbine - can use the wind's energy to generate electricity. Wind turbines are mounted on a tower to capture the most energy at 100 Ft. (30 meters)
or more above ground. They can take advantages of faster and less turbulent wind. Turbines catch the wind's energy with their propeller like Blades. Usually two or three Blades are mounted on a shaft to form a Rotor. A blade acts like an Airplane wing. When the wind blows, a pocket low-pressure air forms on downward side of the blade. The low- pressure Air pocket then pulls the blade toward it, causing the rotor to turn. This is caused lift. The force of the lift is actually much stronger than the wind's force against the front side of the blade, which is called Drag. The combination of Lift and Drag causes the Rotor to spin like a propeller and the and the turning shaft spins to generate to make electricity.
Horizontal Axis wind turbines have the main Rotor shaft and Electrical Generator at the top of a
with a Servo motor. Most large wind turbines have a Gear Box, which turns the slow rotation of
the Rotor into a faster rotation that is more suitable to drive an electrical Generator. The output
of a wind turbine depends upon the turbine's size and wind speed through the Rotor. An average
on-shore wind turbine with a capacity of 2.5 - 3.0 MW can produce more than six million KWh
in a year -enough to supply 1500 households with electricity.
In India, the 'on-shore' potential for utilization of wind energy 65000 MWs. India is blessed with
7500 Kms. (app,) of coastline and its territorial waters extend up to 12 Nautical miles in the sea.
The unexploited resource availability has the potential to sustain the growth of wind energy sector
in India in the years to come. It empowers to address the need for a cheaper, non - polluting and environment friendly solution to power rural India also.
In India, minimum cost of installation works out to Rs. 1.00 crore for a 250 KW Wind Turbine.
An individual has to bring Rs.30-35 lakhs upfront and balance an be funded by bank loans. The output of a Wind turbine depends upon the turbine's size and wind speed through the Rotor. An average on shore wind turbine with a capacity of 2.5 - 3.0 MW can produce more than six million KWh in a year - enough to supply 1500 households with electricity.
I went to Germany recently and picked up the above pic gathered on the way from Belgium.
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