Question
State advantages and limitations in harnessing wind energy.
✓
Answer
- Advantages of wind energy:
- $(1)$ Wind energy is an environment friendly.
- $(2)$ It is efficient source of renewable energy.
- $(3)$ It requires no recurring expenses for the production of electricity.
- Limitations in harnessing wind energy:
- $(1)$ Wind energy farms can be established only at those places where wind blows for the greater part of a year.
- $(2)$ The wind speed should be higher than $15 km/ h$ to maintain the required speed of the turbine.
- $(3)$ There should be some back-up facilities (Like storage cells) to take care of the energy needs during a period when there is no wind.
- $(4)$ Establishment of wind energy farms requires large area of land. For a $1 ~MW$ generator, the farm needs about $2$ hectares of land.
- $(5)$ The initial cost of establishment of the farm is quite high.
- $(6)$ The tower and blades need a high level of maintenance as they exposed to the vagaries of nature like rain, sun, storm and cyclone.
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