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By how much the temperature (in degree celcius) of ocean surface should be greater than that of water below 1 km of the surface for producing OTEC (Ocean Thermal Energy Conversion) Energy? 

By how much the temperature (in degree celcius) of ocean surface should be greater than that of water below 1 km of the surface for producing OTEC (Ocean Thermal Energy Conversion) Energy?  Correct Answer 25° – 27°C 

In OTEC, solar energy is absorbed up to a depth of 1000 meters above sea level. It should have sea surface temperature of 25°C to 27°C. One such effort in India is taking place in Kulasekarapatnam in Tamil Nadu with the cooperation of USA. 

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