explain Ocean -Thermal Energy and how can it be harnessed. mention any two limitations in obtaining the energy from the oceans?
Answers
There are three basic methods for coverting wave energy to electricity: Float or buoy systems that use the rise and fall of ocean swells to drive hydraulic pumps. The object can be mounted to a floating raft or to a device fixed on the ocean floor. ... That energy is then harnessed and sent to shore by electrical cable
Energy from the oceans can be obtained in the form of tidal energy, wave energy and ocean thermal energy. But these energy sources suffer from the following limitations:
There are very few locations where dams to utilise tidal energy can be built.
Cost of installation of power houses is extremely high and efficiency of plants is comparatively small.
Power plants built in oceans or at sea-shores will need high continuous maintenance as chances of corrosion are extremely high.
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Explanation:
The forms of energy that can be obtained from the ocean are tidal energy, wave energy, and ocean thermal energy. There are several limitations in order to harness these energies.
→ Tidal energy depends on the relative positioning of the Earth, moon, and the Sun.
→ High dams are required to be built to convert tidal energy into electricity.
→ Very strong waves are required to obtain electricity from wave energy.
→ To harness ocean thermal energy efficiently, the difference in the temperature of surface water (hot) and the water at depth (cold) must be 20ºC or more.