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Why we create a vacuum in the low pressure fresh water generator ?

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Question added by SALIM BEN HARIZ , MAINTENANCE SUPERVISOR , DIETSMANN
Date Posted: 2015/03/03
SALIM BEN HARIZ
by SALIM BEN HARIZ , MAINTENANCE SUPERVISOR , DIETSMANN

The vacuum is created in the LP fresh water generator to reduce the evaporation temperature of the water.

At1 atm , T=100 C

At0.2 atm , T=60 C

So we don't need heaters for the evaporation of the water, that' why the diesel engine cooling water outlet (85 C) is used as the heating agent in the generator.

sachin abraham
by sachin abraham , Fourth Engineer , Reederei Nord Ltd

by using an air ejector(venturi effect)

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