Explain ocean-thermal energy and how can it be harnessed. Mention any two limitations in obtaining the energy from the oceans ?

Explain ocean-thermal energy and how can it be harnessed. Mention any

1.	Explain ocean-thermal energy and how can it be harnessed. Mention any two limitations in obtaining the energy from the oceans ?
Answer» Solution :The difference in temperature between warm surface water heated by the SUN and colder water found at ocean depth is a source of energy called Ocean thermal energy. The difference in temperature is exploited in OTE CONVERSION plants. The warm surface water is used to BOIL a VOLATILE liquid like ammonia. The vapours are used to run the turbine of a generator. Limitations : (i) Efficient commercial exploitation is DIFFICULT. (ii) Expensive set up.