Jacket cooling water system

In the name of Allah who is the most beneficient and merciful

This system forms closed circuit water passing from the engine returns through cooler to the p/p suction and then back to engine. A header and expansion tank is placed at a reasonable height to allow venting and pressurizing of the sys. This is connected to both the engine discharge and the pump suction line. A heater is included with a bypass and the sys can warm the engine when necessary. Cooling water at the lower end of cylinder jackets passing upto connection from the top of the jacket to the cylinder cover and then exhaust valve(if there). A restricted amount of water is taken from this discharge and passes through turbocharger cooling spaces and air separator is fitted in the return which discharge any trapped air to expansion tank. Other venting connection are taken from top of the engine system, the turbocharger and the cooler.


WRITTEN BY S/C ZEESHAH AHMED
LECTURE BY: CHIEF ENGR. YASEEN SAHAB
EMAIL: ZEETEC4@YAHOO.COM
DATE: 12.july.2009

Piston cooling water system

In the name of Allah who is the most beneficient and merciful

The cooling medium for the pistons varies with different engines, it may be frsh water, distilled water or lub. oil.
This system is indepentdent of the jacket system. The circulating pump draws water from a drain tank, passing it through
a cooler to the pisotn cooling inlet glands . cooling returns pass through sight glasses and thermometers before flowing
by gravity to drain tank. A heating coil fitted in the drain tank allows heating when warming of the engine is required
before starting the main engine.
WRITTEN BY S/C ZEESHAH AHMED
LECTURE BY: CHIEF ENGR. YASEEN SAHAB
EMAIL: ZEETEC4@YAHOO.COM
date: 13.july.2009
link: zeetec4.googlepages.com

Diesel engine fresh water cooling system

Diesel engine fresh water cooling system:

slow and medium speed engine use fresh water to circulate and cool the cylinder jacket covers,
pistons, exhaust valves(if fitted) and turbocharger as these parts subjected to work under high
temperature and pressure conditions, cooling is required to prevent the overheating of these parts
fresh water is most common medium employed. fresh water may cause the deposits of salt on
heated surfaces resulting pitted and corrosion and pitting circulating water is cooled in the
cooler by passing sea water in the coolers.

jacket cooling water system:

This system forms closed circuit water passing from the engine returns through cooler to pump
suction and then back to engine. A header and expansion tank is placed at a reasonable height
to allow venting and pressurizing of the system. This is connected to both the engine discharge
and the pump suction line. A heater is included with a bypass and the system can warm the engine
when necessary.

cooling water enters at the lower end of the cylinder jackets passing upto connection from the
top of the jacket to the cyclinder covers and the exhaust valves( if fitted). A restricted
amount of water is taken from this discharge and passes through turbocharger cooling spaces

Cooling system of main engine

In the name of Allah who is the most beneficient and merciful

Slow and med. speed engine use fresh water to circulate and cool the cylinder jacket covers, pistons, exhaust v/v(if fitted) and turbocharger as these parts are subjected to work under high temp's and pressure conditions, cooling if required to prevent the overheating of these parts. Fresh water is most common medium employed. Fresh water may cause the deposits of salt on heated surfaces resulting pitting and corrosion hence chemical additives are added in the circulating water is cooled and pitting. circulating water is cooled in the coolers by passing sea water in sea coolers.


WRITTEN BY S/C ZEESHAH AHMED
LECTURE BY: CHIEF ENGR. YASEEN SAHAB
EMAIL: ZEETEC4@YAHOO.COM
date: 12.july.2009