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OTEC (Ocean Thermal Energy Generation) works under the principle of differential temperature of the ocean in its latitude by the solar heating of the oceans on the surface (250C & more)and depth (500-100 feet at 00C). Thermal gradient temperature upto 220 C and higher can be exploited The energy is derived by the heat loss in the cooling water when warm water vaporises ammonia to steam to drive the turbine to generate electricity. An effeciency of 6.7%- 7% can yield 32 mega watts power.

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