Ocean Thermal Energy Conversion


 
 
Concept Explanation
 

Ocean Thermal Energy Conversion

Ocean Thermal Energy Conversion (OTEC): 

Solar energy falling on the surface of the ocean warms it. The water at the surface of the ocean is warmer than the water deep below. Generally, the difference in temperature is about 20°C between the surface water and the water at a depth of 1 km.

This temperature difference can be used to operate an ocean thermal energy conversion (OTEC) plant. Clearly, the ultimate source of the stored thermal energy of the ocean is the Sun.

In one system for OTEC, a fluid with low boiling point such as chlorofluorocarbon (CFC) is used as the "working fluid'.

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Sample Questions
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Question : 1

Which of the following are correct ?

(a) The temperature difference of water at the surface of the sea and deep below in the sea can be used to operate an ocean thermal energy conversion plant .

(b) In the system for ocean thermal energy conversion plant a fluid with low boiling point such chlorofluorocarbon (CFC) is used as the "working fluid'.

(c) The sea water at the surface is used to vaporize liquid ammonia in an evaporator of OTEC.

Right Option : D
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Question : 2

Ocean - thermal - energy can be utilized when the temperature difference between the water at the surface and water at depths up to 2 km is __________

Right Option : C
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Question : 3

Geothermal energy resource is ____________________

Right Option : D
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