To obtain ocean thermal energy, the plants can operate if the minimum temperature difference between water at surface and water at depths up to 2 km is
A
40∘C
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B
60∘C
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C
80∘C
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D
20∘C
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Solution
The correct option is D 20∘C Ocean thermal energy conversion (OTEC) power plants operate as long as the temperature between the warm surface water and the cold deep water differs by approximately 20°C.