Wind Turbines
Wind Turbines
Wind Turbines
Wind Turbines
Wind Turbines
Wind Turbines
Wind Turbines
Wind Turbines
Wind Turbines
Wind Turbines
Wind Turbines
Wind Turbines
Wind Turbines
Wind Turbines
Wind Turbines
Wind Turbines
Wind Turbines
Wind Turbines
Wind Turbines
Wind Turbines
Wind Turbines
Wind Turbines
Wind Turbines
Wind Turbines
Wind Turbines
Wind Turbines
Wind Turbines
Wind Turbines
Saturday 1 January 2011
Wind turbines.....the future of power, you too could have your own wind farm
Green sources of energy have become a necessity in the world we live in today. With global reserves of fossil fuels such as coal, natural gas and petroleum reserves only forecast to last for only a few decades. And, with the high prices of conventional sources of energy and the environmental hazards posed by them, alternative sources of power have come as a relief to many. and wind turbines ae here to stay.
Wind Power - This is one of the few renewable resources of energy available in plenty. The kinetic energy of the wind is utilised v by windmills connected to turbines. This energy is converted into electricity and can be used for many domestic tasks, including water pumping and providing electricity to individual homes. On a commercial level, largewind farms made up of thousands of windmills, are producing thousands of megawatts of power every year for industrial and for other conventional requirements.
A Wind Power Turbine - the basics
Amongst the various alternative energy sources that are available to us today, wind energy figures as one of the most widely harnessed resource, thanks to the availability of wind power turbines. Essentially a wind power turbine is a rotary devise, which converts the kinetic energy of the wind into mechanical energy. This mechanical energy can be further used to generate electricity, which can then be used for a variety of purposes, be it agricultural, industrial or domestic.
Horizontal Axis Wind Turbines - These turbines rotate around a given horizontal axis and are commonly used. They comprise of a rotor shaft and an electrical generator placed near the top of the tower pointing into the wind. A wind vane can be used for smaller turbines while some large turbines involve the use of a wind sensor joined to a servomotor.
The turbine blades are made rigid in order to prevent them from colliding with the tower during strong wind conditions. The blades are also placed at a suitable distance from the tower and sometimes tilted in the upward direction. Turbulence is a big problem thus most horizontal axis wind turbines are built as upwind machines.
Vertical Axis Wind Turbines(VAWT) - These turbines have a vertically aligned main rotor shaft and there biggest advantage is that they don’t need to be pointed in the direction of the wind to be effective. This enables them to work well in areas with variable wind directions.
Here the generator and the gearbox can be placed near the ground thereby making maintenance easier. Some of p
There are a few particular types of VAWT machines:
* Darrieus wind turbines are shaped in the form of an eggbeater with two curved blades and have good efficiency. They create a large ripple torque and require an additional motor to run, as their starting torque is very low. Newer turbines are typically equipped with 3 or more blades for greater solidity of the rotor.
* The Giromill has straight blades and can self-startup easily. Its cycloturbine subtype has variable pitch which leads to high startup torque, good coefficient of performance, better resistance to turbulent winds and a lower blade speed ratio.
* Savonius wind turbines are drag type devices and are always self-starting; provided there are three scoops.
There are other unconventional designs also such as Ducted Rotor, Maglev wind turbine, Co-axial, multi rotor horizontal axis turbines and furling tail-twisted blade turbines.
Windy Miller, into the wind....
Read more wind turbine news today!!!
Green sources of energy have become a necessity in the world we live in today. With global reserves of fossil fuels such as coal, natural gas and petroleum reserves only forecast to last for only a few decades. And, with the high prices of conventional sources of energy and the environmental hazards posed by them, alternative sources of power have come as a relief to many. and wind turbines ae here to stay.
Wind Power - This is one of the few renewable resources of energy available in plenty. The kinetic energy of the wind is utilised v by windmills connected to turbines. This energy is converted into electricity and can be used for many domestic tasks, including water pumping and providing electricity to individual homes. On a commercial level, largewind farms made up of thousands of windmills, are producing thousands of megawatts of power every year for industrial and for other conventional requirements.
A Wind Power Turbine - the basics
Amongst the various alternative energy sources that are available to us today, wind energy figures as one of the most widely harnessed resource, thanks to the availability of wind power turbines. Essentially a wind power turbine is a rotary devise, which converts the kinetic energy of the wind into mechanical energy. This mechanical energy can be further used to generate electricity, which can then be used for a variety of purposes, be it agricultural, industrial or domestic.
Horizontal Axis Wind Turbines - These turbines rotate around a given horizontal axis and are commonly used. They comprise of a rotor shaft and an electrical generator placed near the top of the tower pointing into the wind. A wind vane can be used for smaller turbines while some large turbines involve the use of a wind sensor joined to a servomotor.
The turbine blades are made rigid in order to prevent them from colliding with the tower during strong wind conditions. The blades are also placed at a suitable distance from the tower and sometimes tilted in the upward direction. Turbulence is a big problem thus most horizontal axis wind turbines are built as upwind machines.
Vertical Axis Wind Turbines(VAWT) - These turbines have a vertically aligned main rotor shaft and there biggest advantage is that they don’t need to be pointed in the direction of the wind to be effective. This enables them to work well in areas with variable wind directions.
Here the generator and the gearbox can be placed near the ground thereby making maintenance easier. Some of p
There are a few particular types of VAWT machines:
* Darrieus wind turbines are shaped in the form of an eggbeater with two curved blades and have good efficiency. They create a large ripple torque and require an additional motor to run, as their starting torque is very low. Newer turbines are typically equipped with 3 or more blades for greater solidity of the rotor.
* The Giromill has straight blades and can self-startup easily. Its cycloturbine subtype has variable pitch which leads to high startup torque, good coefficient of performance, better resistance to turbulent winds and a lower blade speed ratio.
* Savonius wind turbines are drag type devices and are always self-starting; provided there are three scoops.
There are other unconventional designs also such as Ducted Rotor, Maglev wind turbine, Co-axial, multi rotor horizontal axis turbines and furling tail-twisted blade turbines.
Windy Miller, into the wind....
Read more wind turbine news today!!!
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