Question

What are the limitations of extracting energy from a) the wind b) waves c ) tides??

Answer 1

Answer:

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Explanation:

(a) Limitations of extracting energy from the wind: Wind flowing with a sufficient speed is not available everywhere and all the time. Thus wind is not a dependable source of energy. The kinetic energy of wind (wind energy) can be used only at the site of windmill.

(b) Limitations of extracting energy from ocean waves: Wave energy would be commercially viable only at places where the waves are strong. The energy produced from waves has to be transmitted through long distances at the possible of use.

(c) Limitations of extracting energy from tides: There are very few sites suitable for harnessing tidal energy. The rise and fall of water during tides is not very large. So, large scale generation of electricity is not possible.

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Answer 2

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a) Limitations of extracting energy from wind :-

☛ Wind generators to produce electricity can be established only at those places where wind blows for the greater part of the year.

☛ The wind speed should be higher than 15 km/h to maintain the required speed of wind turbines for generating electricity.

☛ The initial cost of establishing wind energy farms is quite high.

b) Limitations of extracting energy from waves :-

☛ The wave energy can be hardnessed at only those place where the sea waves are very strong.

☛ The efficiency of power plants based on wave energy is very low.

☛ The power plants bulid in oceans or at sea shores have high cost of installation,corrode easily and need a lot of maintenance.

c) Limitations of extracting energy from tides :-

☛ There are very few sites around the world which are suitable for building tidal barrages.

☛ The rise and fall of sea water during high and low tides is not enough to generate electricity on a large scale.