How does a fresh water generator work on a ship?
Fresh water generator, one of the important machinery on board a ship, is something that cannot be done without. Thus fresh water is produced by evaporating sea water using heat from any of the heat source. The evaporated sea water is then again cooled by the sea water and the cycle repeats.
How a freshwater generator converts seawater to freshwater?
A unit used for conversion of seawater into fresh water by vacuum distillation based on evaporation and condensation. Single-stage freshwater generator consists of a chamber with two titanium plate packs acting as an evaporator and a condenser respectively.
What are the two types of marine fresh water evaporators?
There are 4 types of freshwater generator :
- Submerged type: also known as a single-effect boiling evaporator.
- Alfa Laval type: consists of two sections: evaporator section and the condenser section.
- Flash type: in this type of f.w.g. flash process is used to evaporate the sea water.
What is brine in fresh water generator?
For the satisfactory operation of the freshwater generator, a constant level of brine to be maintained in the shell. Brine is the concentrated sea water after liberation of water vapours. This brine is gradually extracted from the shell. Usually this is achieved by the combined air-brine ejector.
What are the safeties in fresh water generator?
Ans: Safeties In A FWG Are: 1. Vacuum Breaker For Releasing The Vacuum At The Time Of Shutting Down. 2.
How do we start fresh water generator?
Starting of Fresh Water Generator:
- First we need to start the ejector pump.
- Intake of feed water:
- Start the chemical injection unit.
- Check the degree of vacuum in evaporator to 0.9 bar.
- Injecting the hot water.
- Switch ON the power of salinity indicator.
- Check the generated distillate.
- Starting the distillate pump.
What are the parts of fresh water generator?
Parts of Fresh Water Generator And Their Function. A fresh water generator consists of parts such as; heat exchanger, demister, ejector pump, distillate pump, salinometer, sea water pump, orifice and control panel.
What are the main parts of fresh water generator?
A fresh water generator consists of parts such as; heat exchanger, demister, ejector pump, distillate pump, salinometer, sea water pump, orifice and control panel. For both plate and shell type fresh water generator; everything remains the same other than heat exchanger.
What are the common problems encountered in fresh water generator and what are its solutions?
Common Problems Faced in Fresh Water Generators with Possible Causes and Solutions. The heating tubes or the condenser piping are fouled from the inside, and they need to be cleaned. Hot water temperature and or flow rate is low and needs to be increased by the operator.
What is RO type fresh water generator?
Reverse osmosis is a water purification technology that uses a semi-permeable membrane to remove salts and impurities from the seawater in order to create fresh water. Wärtsilä offers RO systems capable of producing between 40 and 1500 m3 of fresh water, daily.
What is plate type fresh water generator?
Plate Type Fresh Water Generator Heat from the diesel engine cooling water is used to evaporate a small fraction of the seawater feed in the plate type freshwater generator or evaporator. Unevaporated water is discharged as brine (by combined air /brine ejector).
What are the components of fresh water generator?
A fresh water generator consists of parts such as; heat exchanger, demister, ejector pump, distillate pump, salinometer, sea water pump, orifice and control panel.
