WIND-MILL GENERATING ELECTRICITY.

Wind-Mill Generating Electricity is the conversion of the energy in wind into a more useful form of energy, like electricity. It is a renewable source of energy that helps to cut down on the pollution of the earth’s air. Wind power capacity has expanded quickly to 336 GW in June 2014, and wind energy production was about 4% of total worldwide electricity usage, and growing fast. Wind power is widely used in European countries, and more recently in the United States and Asia. In 2012 wind power accounted for approximately 30% of electricity generation in Denmark, 20% in Portugal and 18% in Spain.

WIND-MILL GENERATING ELECTRICITY WORK

Wind power stations use the wind to turn a turbine which turns a magnet inside a coil (a type of generator). The wind has kinetic energy (Movement energy) which is changed into mechanical energy by the blades on the turbine. The turbine then turns a generator which creates electrical energy (voltage). The turbine is usually connected by a [gearbox] to help control the speed it turns the generator at.

The wind is a form of solar energy caused by a combination of three concurrent events:

• The sun unevenly heating the atmosphere
• Irregularities of the earth’s surface
• The rotation of the earth. 
• Wind flow patterns and speeds

Vary greatly across the United States and are modified by bodies of water, vegetation, and differences in terrain. Humans use this wind flow, or motion energy, for many purposes: sailing, flying a kite, and even generating electricity.

A wind turbine turns wind energy into electricity using the aerodynamic force from the rotor blades, which work like an airplane wing or helicopter rotor blade. When wind flows across the blade, the air pressure on one side of the blade decreases. The difference in air pressure across the two sides of the blade creates both lift and drag.

TYPES OF WIND GENERATING ELECTRICITY

1 HORIZONTAL-AXIS

Horizontal-axis wind turbines are what many people picture when thinking of wind turbines. Most commonly, they have three blades and operate “upwind,” with the turbine pivoting at the top of the tower so the blades face into the wind.

2 VERTICAL-AXIS TURBINES

Vertical-axis wind turbines come in several varieties, including the eggbeater-style Darrieus model, named after its French inventor. These turbines are omnidirectional, meaning they don’t need to be adjusted to point into the wind to operate.

Wind turbines can be built on land or offshore in large bodies of water like oceans and lakes. The U.S. Department of Energy is currently funding projects to facilitate offshore wind deployment in U.S. waters.

WIND FARM DEVELOPMENT

Siting a wind farm varies from one location to another, but there are some important matters for landowners to consider:

• Understand your wind resource
• Evaluate the distance from existing transmission lines
• Determine the benefits of and barriers to allowing your land to be developed
• Establish access to capital
• Identify reliable power purchaser or market
• Address siting and project feasibility considerations
• Understand wind energy’s economics
• Obtain zoning and permitting expertise
• Establish dialogue with turbine manufacturers and project developers
• Secure agreement to meet O&M needs.

ADVANTAGES 

Wind power stations have the advantage over fossil fuel power stations as they do not produce any greenhouse gases such as carbon dioxide or water vapor. They also do not produce gases that help to make acid rain such as sulfur dioxide. They also make the environment safer and less pollution is caused.

DISADVANTAGES 

Wind turbines have to be carefully placed. They must be in positions where there is a constant, steady supply of wind. In fact, the wind must not become too strong or it may damage the turbine. Because wind is unpredictable, so is the amount of power that wind turbines will produce, making them an unreliable source of energy.

CONCLUSION;-

Wind energy is probably the solution to our energy demands. It has great potential and is easy to manage. All you have to do is build the turbine and everything else is going to be free. With only 1 turbine, you can power over 200 homes.  Every wind turbine lasts for about 20-25 years. As long as the wind blows, wind turbines can harness the wind to create power. Wind power only makes up a tiny percent of the electricity that is produced.

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