Paano paganahin ang Fresh Water Generator
at paano ipara.
Published on Sept 29,2020
Training and Assessment Center using the Kongsberg Simulator:
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Starting the Fresh Water Generator
Before starting the freshwater generator we have to check that the ship is not in congested water, canals, and is 20 nautical miles away from the shore because near the shore the effluents from factories and sewage are discharged into the sea can get into the freshwater generator.
Check whether the engine is running above 50 rpm, the reason for this is that at low rpm the temperature of jacket water which is around 60 degrees and not sufficient for evaporation of water.
Check the drain valve present at the bottom of the generator is in close position.
Now open suction and discharge valves of the seawater pump which will provide water for evaporation, and to the eductor for creating a vacuum.
Close the vacuum valve situated on top of the generator.
Now start the seawater pump and check the pressure of the pump. The pressure is generally 4-6 bars.
Wait for the vacuum to build up. The vacuum should be at least 90% which can be seen on the gauge present on the generator.
Now open hot water (jacket water) inlet and outlet valves. Always open the outlet valve first and then the inlet valve. Slowly start to decrease the opening of the bypass valves to 25% open.
When freshwater produced is at a 15% level, start the distillate pump
Switch on the salinometer to auto.
Stopping the Freshwater Generator:
Close the jacket water inlet valves. Generally, the inlet is closed first and then the outlet valve.
Stop the freshwater pump.
Switch off the salinometer.
Stop the seawater pump (also known as ejector pump).
Open vacuum valve.
Close seawater suction valve and overboard valve. This is generally not required as they are non- return valves. However, in the case of valve leaking or damage, these valves are to be closed without fail.
Close valve supplying seawater to the condenser.
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