- Scale formation in evaporator
- Jacket cooling water temperature lower than prescribed
- Short cycling of jacket cooling water
- Air stay in evaporator
- Faulty solenoid valve
- Faulty flow-meter
- Check the vacuum
- Leakage in the plant like from pressure gauge, vent, distillate pump seal
- Scale formation in condenser
- Wrong order of fitting of plates in condenser.- fresh water stay in condenser or due to which fresh water produced goes to sea water.
- Incorrect feed
- Nozzle choked
- Ejector malfunctioning due to worn parts
- Faulty ejector nozzle
- Ejector pump problem- not developing pressure
- Filter before ejector pump dirty
- Distillate pump faulty
- Condenser cooling water flow reduced
- Condenser cooling water temperature too high
- If the temp of the shell is too high
- Ships draft is less
- Level of brine is too high
1. High cost: Manganese bronze is a costly alloy, making it less economical for large propellers. 2. Low strength-to-weight ratio: Compared to other propeller materials like nickel-aluminum bronze or stainless steel, manganese bronze has a lower strength-to-weight ratio. 3. Susceptible to corrosion: Manganese bronze can corrode in seawater, especially when exposed to high velocities and turbulence. 4. Poor cavitation resistance: Manganese bronze is more prone to cavitation damage than other materials. 5. Difficult to cast and machine: Manganese bronze is challenging to cast and machine, making it less desirable for complex propeller geometries. 6. Limited weldability: Manganese bronze has poor weldability, making repairs and modifications difficult. Nickel-aluminum bronze or stainless steel are commonly used for propellers due to their: - High strength and durability - Excellent corrosion resistance - Good cavitation resistance - Ease of casting and machining - Weldability
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