Table of Contents
- 1 What are the reasons of vacuum loss in fresh water generator?
- 2 What are the common problems encountered in fresh water generator and what are its solutions?
- 3 How do you control a vacuum on a fresh water generator?
- 4 What happens when vacuum reaches 100% in fresh water generator?
- 5 What is a freshwater generator?
- 6 What are the problems with a marine freshwater generator?
- 7 Can a freshwater generator be damaged by steam?
What are the reasons of vacuum loss in fresh water generator?
What are the causes of loss of vacuum in fresh water generator?
- Failure of ejector pump.
- Failure of ejector nozzle (fouling, erosion)
- Malfunction of check valve (at ejector nozzle)
- Defective vacuum breaker.
- Any air leakage into the system (At joint)
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 are the common faults problems do we encounter when operating freshwater generator?
Troubleshooting – Fresh Water Generator
| Problem | Cause |
|---|---|
| Sight glass is filled with water. | Outlet piping is clogged. |
| Distillate pump is drawing air. | |
| Salinity of distillate is too high. | Distillate generation rate is too high. |
| Evaporating temperature is too low.(50·C or lower) |
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.
How do you control a vacuum on a fresh water generator?
Operation
- Make sure seawater ejector pump suction, discharge and overboard valves are open.
- Wait for vacuum to build up inside fresh water generator shell.
- Open the feed water valve to feed seawater to the evaporator.
- Open main engine jacket cooling water inlet and outlet to the evaporator gradually.
What happens when vacuum reaches 100% in fresh water generator?
What will happen when vacuum reach 100% in fresh water generator? Increase the salinity because of agitation. At that time boiling rate is very high.
How do you increase the production of a fresh water generator?
The capacity of fresh water generator can be varied by reducing or increasing the amount of jacket cooling water to the evaporator. The quantity of jacket cooling water to the evaporator can be adjusted by adjusting the bypass valve provided.
Which parameters should be checked in fresh water generator?
Starting the Fresh Water Generator. Before starting the fresh water generator we have to check that the ship is not in congested water, canals and is 20 nautical miles away from the shore.
What is a freshwater generator?
marine. 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 problems with a marine freshwater generator?
The temperature of hot water is low and needs to be increased to the specified level. Hot water flow rate is low and needs to be increased to the specified level. There is an air leak present in the system which should be repaired and then tested at 0.05 MPa to make sure regular operation has been restored.
Why is my fresh water generator not working?
The Fresh Water Generator has been used in an area where the feed water is dirty and needs to be stopped. The reading of the salinity indicator is faulty and has to be checked using the indicator test switch; the electrode needs to be cleaned. The piping of the condenser has been damaged and needs to be plugged inappropriately.
How is water discharged from a 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). The evaporated water passes through the demister to the plate type vapour condenser.
Can a freshwater generator be damaged by steam?
The FreshWater Generator can be damaged if it is run with a valve or cock in closed position installed on the steam drain outlet line. Hence these should not be incorporated on the outlet steam drain line. The inlet of the ejector pump should always be filled with seawater.