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WIND POWER

WIND POWER. How it Works. Parts : - Rotor blades , these are the sails of the system, they capture the wind eventually turning the wind into power. - Shaft , the shaft is connected to the centre of the motor, and turns With the blades

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WIND POWER

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  1. WIND POWER

  2. How it Works Parts: - Rotor blades, these are the sails of the system, they capture the wind eventually turning the wind into power. - Shaft, the shaft is connected to the centre of the motor, and turns With the blades - Generator, is a device that produces a electrical voltage. It is a coiled wire inside, connected to an assembly of magnets. When the rotor spins the shaft, the shaft spins the assembly of magnets, generating voltage in the coil of wire - Gear box, increases speed of shaft between rotor hub and generator - Yaw controller, Aligns motor with wind direction - Brakes, Stops turbine in case of overload or failure

  3. Apart from Rotors being set up to catch the kinetic energy in the wind, it is almost an identical set up to a hydroelectric dam. • When the turbine blades capture the wind and start moving, they spin the shaft • This is connected through the hub to the generator • The generator then turn this into electricity • So… generating electricity from the wind is all about transferring energy from one source to another.

  4. Different Wind Turbines • There are two different types of wind turbines • Horizontal-Axis Wind Turbines (HAWTs) • Vertical-Axis Wind Turbine (VAWTs) • HAWTs are much more common and efficient, there is only one type. • VAWTs in commercial use.

  5. Wind power generates 1% of worldwide energy use. • At the end of 2006 worldwide, wind turbines produced 74,223 megawatts of electricity. • It accounts for approximately 20% of electricity use in Denmark, 9% in Spain, and 7% in Germany. • Globally, wind power generation more than quadrupled between 2000 and 2006. from 2005 to 2006 the market grew by 41%. • The annual market for wind is increasing at 32%. • New equipment cost €18 billion in 2006. • Wind energy is plentiful, renewable, widely distributed, clean, and reduces toxic atmospheric and greenhouse gas emissions if used instead of fossil fuels. Energy

  6. Cost – 1 MWh costs $55.80. Very high start up costs, even though wind is free. • Environmental impact – wildlife and landscape. • Sites for turbines – not all places are windy enough. May ruin scenery in windy places. • Energy production – do not produce much energy for everyone. Huge numbers are needed which cover a lot of space. • Efficiency – turbines have a maximum efficiency of 59%, however, they only achieve a small proportion of this. • There is no control over how much energy you can actually get. Limitations

  7. Wildlife Reports of birds flying into turbines and being injured or killed. 14 studies have shown that American wind turbines seem to kill around 40,000 birds a year. If turbines are situated on a ridge they can interfere with a bird’s migratory path. There have also been reports that bats have been affected by the turbines. Scenery Many windy places are in AONBs and National Parks, conservationists do not like the idea of them being covered with wind turbines. Noise pollution is a problem so local residents may not like the sight and sound of them near their houses. Environmental Impact

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