Question

Write three limitations of harnessing three types of energy from oceans

Answer 1

Tidal energy, wave energy, and ocean thermal energy are 3 of the various forms of energy obtained from oceans. However, there are several limitations to harness these energies — (i)High dams are required to be built to convert tidal energy into electricity which incurs lot of cost. (ii)Very strong waves are required, which are not possible all the time. (iii)Tidal energy depends on the relative positioning of the Earth, moon, and the Sun.  (iv) To harness ocean thermal energy, the difference in the temperature of surface hot water and the cold water at depth must be 20ºC or more.

Answer 2

limitations of harnessing marine energy

Explanation:

The energy that can be harnessed from the ocean are: Tidal, wave and ocean

The limitations of harnessing these three types of energies are:

1. Huge infrastructure is required to harness electric energy from tidal energy.
2. Expensive.
3. We require strong waves round the clock, which is not practical.
4. Tidal energy depends on the positioning of the Sun, moon, and the Earth. So no uniform availability.
5. To harness ocean thermal energy, a 20ºC difference in temperature needs to be achieved, which is not practical everywhere and at all times.