How Fresh Water Generators Work (saltwater desalination)

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Learn how fresh water generators work! This 3D animated video shows you all of a fresh water generators main parts, how it works and some of its design features. You will learn how to turn saltwater into drinking water via desalination!

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▶️Introduktion
How Fresh Water Generators (FWG) Work
Seawater is pumped to the condenser heat exchanger. Some of it passes through the condenser and then passes through the evaporator heat exchanger. Some of it is pumped through an educator/ejector and is discharged overboard. Some of the saltwater is siphoned from the condenser to the ejector in order to maintain a vacuum on the FWG shell.

Hot water is pumped to the evaporator where it heats the seawater. The hot water (often engine jacket water) is then discharged from the evaporator and returned to the hot water main circuit.

The FWG shell is placed under vacuum so that the hot water can boil the seawater at a temperature below 100 degrees Celsius. The seawater evaporates and exits the evaporator as water mist. The water mist passes through a demister and condenses on the condenser. The condensed water is distilled water and is pumped out of the FWG by a small fresh water pump. At this stage, the saltwater has been desalinated and the process of desalination is complete.


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