COOLING SYSTEM

1. CYLINDER COOLING/JACKET COOLING
2. FUEL VALVE COOLING
3. PISTON COOLING
4. CHARGE AIR COOLING

CYLINDER COOLING/ JACKET COOLING 

•  FRESH WATER OR DISTILLED WATER WILL BE USE . IT WILL INCORPORATED COOLING OF TURBINES IN TURBOCHARGER ENGINE AND EXHAUST VALVE COOLING.

FUEL VALVE COOLING

• FRESH WATER WILL BE USED, IT WILL BE THE SEPARATE SYSTEM 

PISTON COOLING

• USE MAY BE FRESH WATER LUBRICATION OIL OR DISTILLED WATER.
• IF OIL IS USED IN THIS SYSTEM, ITS GENERALLY COMMON WITH LUBRICATION OIL SYSTEM.

CHARGE AIR COOLING

• SEA WATER WILL BE USED IN THIS SYSTEM

 

Battery Rating

 Battery Rating: Ampere-hour

Battery capacity is usually rated in terms of it's discharge at the 10 hour rate.

Example: A 300Amps battery would be expected to provide 30Amps for 10 hours. 

To prevent Explosion in Battery room

1.Providing proper ventilation inside the compartment. 

• Independent exhaust fan provided [Non-sparking type; should not produce static charge]
• Inlet duct should be below battery level. Outlet duct top of the compartment.  [Both batteries emit Hydrogen. Hydrogen is lighter than air. It accumulate on top of  the compartment] 

2.By preventing any source of ignition. 

• No smoking; No naked flames.
• Battery room lighting must be flame proof (Ex d)
• Room temperature to be maintained between 15°C-25°C 
• Battery should never be placed in emergency switchboard room. [chances of sparking due to arching of circuit breakers] 
• Maintenance tools must be rubberized coating to prevent accidental short circuit. 
• No metal jugs for filling distilled water inside batteries.
• Cables should be adequate size and well connected.

Battery maintenance

1. Cell tops must be kept clean and dry in order to reduce the risk of corrosion and electrical leakage.
2. Terminals should be kept tight, clean and free of any deposits. The connectors can be coated with petroleum jelly.
3. The cables should be examined from time to time for signs of corrosion.
4. Electrolyte level should be checked and topped up with distilled water to cover the electrodes.
5. Gas vent in the cells should be kept free from blockage by dirt or in case of alkaline batteries from crystallized electrolyte. 
6. Pure distilled water should only be used for topping up.
7. Specific gravity should be measured and temperature correction should be applied.
8. A weekly log of critical parameters to be maintained. 
9. Voltage reading of each cell should be taken while the current is actually flowing. [the voltage of battery on an open circuit is however rather misleading]
10. First aid treatment should be understood and first aid equipment must be available at all times. 

Precaution of Batteries

1. Both batteries emit Hydrogen gas.So no naked lights allowed.
2. Battery is stored in well ventilated room.
3. Battery room should be clean and dry.
4. No smoking board to be displayed.
5. Paint work in room should be acid and alkaline resistance.
6. Acid cells should never be placed near Alkaline cells.
7. Never use Lead-acid batterymaintenance gear to Alkaline battery.
8. Use proper PPE. Insulated spanner should be used to prevent accidental short circuit and may cause spark.
9. First aid equipment should be kept near battery room.
10. Never use the thermometer to measure electrolyte temperature. Accidental damage of thermometer cause explosion. 

Battery installation

1. Battery room  should be well ventilated, clean and dry.
2. Both type batteries generate gas during charging. So, No smoking, Naked flames in the vicinity of batteries.
3. Steel work and decks adjacent to lead acid batteries should be covered with acid resisting paint and alkali resisting paint used near Ni-Cd cells.
4. Acid cells must never be placed near alkaline cells. Never use Lead-Acid battery maintenance gear to Alkaline battery installation or vice-versa.(e.g Hydrometer, topping up bottle,etc.,)