WIND ENERGY

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 Wind Energy

Wind energy is an indirect source of solar energy conversion and can be utilised to run windmill which in turn drives a generator to produce electricity. Winds are caused by the pressure gradient. The kinetic energy of wind can be converted into mechanical or electrical energy. 

Wind energy is used to generate electricity by wind turbines. Blowing wind spins the blades on a wind turbine. The blades of the turbine are attached to a hub that is mounted on a turning shaft. The shaft goes through a gear transmission box where the turning speed is increased. The transmission is attached to a high speed shaft which turns a generator. Energy is stored by D.C. batteries. If the wind gets too fast the turbine has a brake that will keep the blades from running too fast and being damaged. 

In India generally wind speeds obtained are in the lower ranges. Attempts are therefore on the development of low cost low speed mills for irrigation of small and marginal farms for providing drinking water in rural areas. In India high wind speeds are obtained in coastal areas of Saurashtra, Western Rajasthan and some parts of central India. 


Advantage

1) It is a renewable source of energy available free of cost. 

2) No fuel consumption no transportation is required

3) Non- polluting and no adverse influence on environment

4) The power generation strats from the moment commissioning is complete. 

5) Power generation is cheaper and recurring cost is almost nill. 


Disadvantage

1) Machines operating on wind energy arenoisy and heavy

2) Large area is required for wind mills

3) High maintenance cost

4) Wind energy is fluctuating in nature and efficiency of operation is poor. 


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