Ocean Thermal Energy

Q.

What is the minimum temperature difference required between the water at surface and 2 km depth to efficiently operate ocean thermal energy conversion plants?

1. 2⁰c

2. 20⁰c

3. 100⁰c

4. no change

Q.

Ocean thermal energy is due to

1. energy stored by waves in the ocean

2. temperature differences at different levels in the ocean

3. pressure difference at different levels in the ocean

4. tides arising out in the ocean