Answers

2014-11-09T12:53:15+05:30
definition;-
Wind power or wind energy is the energy extracted from wind using wind turbines to produce electrical power, windmills for mechanical power, windpumps for water pumping, or sails to propel ships.Large wind farms consist of hundreds of individual wind turbines which are connected to the electric power transmissionnetwork. According to the recent EU analysis for new constructions, onshore wind is an inexpensive source of electricity, competitive with or in many places cheaper than coal,gas or fossil fuel plants.Offshore wind is steadier and stronger than on land, and offshore farms have less visual impact, but construction and maintenance costs are considerably higher. Small onshore wind farms can feed some energy into the grid or provide electricity to isolated off-grid locations



advantages;-

*Continuous sources of energy
• Clean source of energy 
• No emissions into the atmosphere 
• Does not add to thermal burden of the earth 
• Produces no health-damaging air pollution or acid rain 
• Land can be sued to produce energy and grow crops simultaneously
• Economical 
• Benefits local communities (jobs, revenue) 

disadvantages;-
• For most locations, wind power density is low
 • Wind velocity must be greater than 7 mph to be usable in most areas 
• Problem exists in variation of power density and duration (not reliable) 
• Need better ways to store energy 
• Land consumption 

how it is produced?
ans: 
 Wind turbines convert the kinetic energy in the wind into mechanical power. This mechanical power can be used for specific tasks (such as grinding grain or pumping water) or a generator can convert this mechanical power into electricity to powerhomes, businesses, schools, and the like.


hope helped u friend...
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2014-11-10T17:45:08+05:30
Windpower or wind energy is the energy extracted from wind using wind turbinesto produce electricalpower, windmills for mechanical power,wind pumps for water pumping, or sails to propel ships.Large windfarms consist of hundreds of individual wind turbines which are connected to the electricpower tansmission network. According to the recent EU analysis for new constructions, onshore wind is an inexpensive source of electricity, competitive with or in many places cheaper than coal,gas or fossil fuel plants

ADVANTAGES OF WIND ENERGY:
1.The wind is free and with modern technology it can be captured efficiently.
2. Once the wind turbine is built the energy it produces does not cause green house gases or other pollutants.
3. Although wind turbines can be very tall each takes up only a small plot of land. This means that the land below can still be used. This is especially the case in agricultural areas as farming can still continue.
4. Many people find wind farms an interesting feature of the landscape.
5. Remote areas that are not connected to the electricity power grid can use wind turbines to produce their own supply.
6. Wind turbines have a role to play in both the developed and third world.
7. Wind turbines are available in a range of sizes which means a vast range of people and businesses can use them. Single households to small towns and villages can make good use of range of wind turbines available today.

DISADVANTAGES OF WIND ENERGY:
1. The strength of the wind is not constant and it varies from zero to storm force. This means that wind turbines do not produce the same amount of electricity all the time. There will be times when they produce no electricity at all.
2. Many people feel that the countryside should be left untouched, without these large structures being built. The landscape should left in its natural form for everyone to enjoy.
3. Wind turbines are noisy. Each one can generate the same level of noise as a family car travelling at 70 mph.
4. Many people see large wind turbines as unsightly structures and not pleasant or interesting to look at. They disfigure the countryside and are generally ugly.
5. When wind turbines are being manufactured some pollution is produced. Therefore wind power does produce some pollution.
6. Large wind farms are needed to provide entire communities with enough electricity. 
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