Q12 of 15 Page 14

State the principle of working of ocean thermal energy conversion plant. Explain how the plant works? Write one essential condition for it to operate properly. ( CBSE 2013)

The principle of working of OTEC: The water at the surface of the ocean is warmer than the water at deeper depths. This temperature difference can be used by ocean thermal energy conversion(OTEC) systems to generate electricity.
Working of OTEC:
1. In OTEC plant, teh energy of warm surface water is used to convert low boiling point liquid ammonia inot gaseous state.
2.The vapour of ammoni at high pressure is used to spin the turbines of generators converting the ocean thermal energy to electricity.
3. Teh used vapour pass throught eh condenser where cold water, pumped from teh deeper parts of ocean condenses ammonia vapour back inot liquid.
4. The process is tepeated again and gain to get continous prodiction of electricity

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