This condensate is led back to the boiler feed water hot well or cascade tank. The water ejector creates evaporator chamber vacuum condition by driving sea water pass through water ejector, and sea water supplied by the ejector pump to be delivered to ejector for taking out the brine concentrated seawater and air. Your email address will not be published. Thus fresh water is produced by evaporating sea water using heat from any of the heat source.
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Indicator Diagram and Indicating Instrument Explained. The freshwater generator is based on two sets of shell and tube heat exchangers, one acting as evaporator or heater and other as condenser. Fresh water generator FWG is one of the essential machineries on board ship, After-all a large amount of fresh water is utilized on s... The evaporated sea water is then again cooled by the sea water and the cycle repeats. The distilled water is then taken out by integral freshwater pump distillate pump and controlled by salinometer and solenoid valve.
The starting air is inserted in............... This type of fresh water generator is based on two sets of shell and tube heat exchangers, one acting as evaporator or heater and other as condenser.
Extremely important rule of all low weight freshwater generator is that, boiling point of water can be decreased by lessening the pressure of the air surrounding it. Related Posts. Further more Boiler needs demineralized water to reduce overall scale development and corrosion issues.
While entering to the evaporator chamber, feed water evaporates due to vacuum condition. Adequate consumable water might be taken up against the cargo load capacity in the port for satisfying crew and machinery necessity yet isn't prescribed to utilize shore water for boilers because of their low quality, so Fresh water generator is unavoidable on board ship.
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Fresh water generator FWG is one of the essential machineries on board ship, After-all a large amount of fresh water is utilized on ship every day. In the middle of good old days people used to bring across lots of water in their ship.
WHy Are You Here? As you may know the first or most important concern for running a ship or any transportation business is to make money.
A detailed line diagram of a tube type fresh water generator on board ship is shown below. The produced steam condensate from supplied live saturated steam escapes from the socket in the vertical safety blow off pipe. Remember me Login. Because of the vacuum condition inside evaporator feed water evaporates at this temperature.
Keep Blogging. Feed water supply rate to the evaporator is fixed by an orifice fitted at the feed inlet.