The diagram below shows the production of electricity using a system called Ocean Thermal Energy Conversion (OTEC).

The diagram illustrates a method for generating electricity by utilising the ocean's temperature difference, known as Ocean Thermal Energy Conversion (OTEC). It

also

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shows how the same process yields drinking

water

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.

Overall

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, the system involves three stages

:

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:

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harnessing of solar energy, evaporation, and condensation.

Additionally

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, the process relied on temperature contrast between warm surface

water

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used (around 29 degrees Celsius) and cold deep seawater (approximately 5 degrees Celsius) drawn from a depth of up to 1000 meters.

Firstly

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, surface seawater is heated by the sun to about 29 degrees Celsius and

then

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transferred to an evaporation chamber. Here, salt is removed and the

water

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evaporates, producing

vapour

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that passes through a turbine. The movement of

this

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vapour

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drives the turbine to produce electricity. In the next stage, the

vapour

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travels down a pipe into a condensing chamber, where it is cooled by deep seawater circulating around the chamber.

As a result

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, the

vapour

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condenses into pure drinking

water

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,

while

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the salt is returned to the sea.