The diagram illustrates the process of generating energy using a system called Ocean Thermal Energy Conversion (OTEC).
Overall, the process is clearly complex, from evaporating seawater to condensing it into drinking water and using it for generating electricity which is provided for many purposes.
To begin with, warm water, at a temperature of 29 degrees celsius, is moved into the evacuated evaporation chamber. In the process, warm seawater is converted into water vapour by using solar energy. This energy makes salts in warm water extracted from it while water steam makes the turbine spin then electricity is created. Then, water vapour ascent through a conduit toward a condensing chamber.
Turning to the cold seawater, it is taken from a depth of below sea level, where the temperature is 5 degrees Celsius. This cold water surrounds the condensing chamber and plays an important role in cooling the water vapour entering it. As the vapour comes into contact with the cold surface, it condenses and transforms into drinking water while the waste saltwater is removed from the system.