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Wind is caused due to unequal heating of land and water bodies by the sun.

This unequal heating generates air movement and causes winds to blow.

 

This kinetic energy of wind is used to generate wind energy from a windmill

 

Windmill

Windmill is just like a large fan at some height.

Wind causes the blades to rotate 

which in turn rotates the turbine of the electric generator

And electrical energy is produced.

 

The output of single windmill is small and does not produce much electricity.

Therefore, a large number of wind-mills is erected over a large area to produce electricity.

These are known as Wind Energy farms

 

The energy output of all the windmills in a wind energy farm is added to produce electricity commercially.

Wind Energy Farms.jpg

Advantages of using Wind Energy

  • Wind Energy is an environment friendly and renewable source of energy

 

Disadvantages of using Wind Energy

  • Wind Energy farms can only be established where wind blows for a greater part of the year
  • Wind speed required to rate the turbine should be higher than 15 km/hr
  • There should be some storage cells to take care of energy needs when there is no wind
  • Establishment of Wind Energy farms require a large area of land. To establish 1 MW generator, farm needs 2 hectares of land
  • Initial Cost of Establishment of Wind Farms is high
  • Since tower and blades are exposed to Nature, they should be highly maintained in case of rain, cyclone, extreme temperatures

 

  1. Class 10
  2. Chapter 14 Class 10 - Sources of Energy

About the Author

Davneet Singh's photo - Teacher, Computer Engineer, Marketer
Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.