Auxiliary Machinery

LT WATER COOLING OR CENTRAL WATER COOLING SYSTEM AND COOLING SEA WATER AND SERVICE SYSTEM ON SHIP

Please dont refer to the old books there they have shown the diagram of system which was used in 90s
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HIGH TEMPERATURE COOLING FRESH FRESH WATER SYSTEM.

Please dont refer to the old books. There they have shown the diagram of system which was used in 90s
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INSPECTION AND MAINTENANCE OF CYLINDER HEAD/PISTON/PISTON CROWN/CONNECTING ROD/CONNECTING ROD BOLTS/MAIN BEARING SHELL/CRANK PIN SHELL/LINER/PISTON RING,VALVE SEAT/VALVE GUIDE/ROTACAP after overhauling an auxiliary engine in ship.

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NEED FOR ADDITIVE  in jacket cooling water in ENGINE system .

=Fresh water is used for cooling medium cylinder cover, liner, exhaust valve,turbocharger.  1.However  acid and oxygen dissolved in water can corrode the surface 2.salt in water can form scales 
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REFRIGERATION PLANT on my SHIP with line LINE DIAGRAM . SHOWING various COMPONENTS/PARTS in detail    

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AIR CONDITIONING PLANT/CENTRAL COOLING on my SHIP with line LINE DIAGRAM . SHOWING various COMPONENTS/PARTS in detail

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FAULT AND TROUBLESHOOTING IN PURIFIER

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WHAT IS VERTICAL SHAFT HEIGHT ,PURIFIER BOWL HEIGHT AND PARING DISC HEIGHT IN PURIFIER?

1.PARING DISC HEIGHT ADJUSTMENT

The height of the paring disc above the frame hood must be measured if the bowl spindle has been dismantled or if the bowl has been replaced with a new one

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DRIVING DEVICE AND CENTRIFUGAL CLUTCH IN PURIFIER

The purifier bowl is mounted upon the vertical shaft. The most important point is that the bowl is driven on a keyless taper secured by a lock nut on the vertical shaft. The vertical shaft is supported on the upper part by a bearing with six springs located in the radial direction that function to take up vibration in the horizontal direction. The lower end of the vertical shaft is supported by a self aligning rollar ball bearing to take up the vertical thrust. The ball bearing 

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PROCEDURE OF OVERHAULING  PURIFIER ON BOARD SHIP

2.THE STEPS FOR OVERHAULING ARE AS FOLLOWS;

1.Isolate the purifier first.

2. remove the hoses which is connected to the connecting housing.

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WORKING AND FUNCTION OF EACH PART OF PURIFIER ONBOARD SHIP

The separation process takes place in the rotating bowl. Un separated oil is fed into the bowl through the inlet (201). The oil is cleaned in the bowl and leaves the separator through the outlet (220) via a paring chamber.
Impurities heavier than the oil are collected in the sludge space at the bowl periphery and removed automatically at regular intervals.

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NPSH in pump marine

1.DEF;The margin of pressure over vapor pressure, at the pump suction nozzle, is Net Positive Suction Head (NPSH). NPSH is the difference between suction pressure (stagnation) and vapor pressure.  

2.SOME POINTS;If a liquid to be pump is in a tank which is open to atmosphere and it is also at a height above the pump the liquid flow into the pump because of its head in due to the effect of atmospheric pressure on its surface. The pump in this case only adds to the energy of the system .

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Procedure to start a purifier in ship?

Starting the purifier:

1. Ensure the lines are set and respective walls are open usually the lines are set from settling tank to service tank.

2. Check the  oil level in sump.

3. Open operating water valve  to purifier and sludging  valve to sludge tank

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The different types of expanslon v/v and explain which type of expansion v/v do
you have onboard

Ans - There are basically four types of valves that are in used. These valves are also refer to as metering devices.

Automatic Exp. Valves
Thermostatic Exp. Valves click here