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cooling system in i.c. engine,design aproach
Post: #1

hi, i'm student from 3rd year mechanical engg.
i need information about my seminars topic.
the topic is " cooling system in i.c.engine ,design approach"
hoping for positive reply.
Post: #2
Post: #3
HOW Can i get the information about my topic ?? please reply asap..........
Post: #4
Combustion generates a great deal of heat, and some of this transfers to the walls of the engine . Normally Cooling systems usually employ air (air cooled) or liquid cooling while some very hot engines using radiative cooling ( Rocket engines). And Some high altitude rocket engines use ablative cooling where the walls gradually erode in a controlled fashion. Rockets in particular can use regenerative cooling which uses the fuel to cool the solid parts of the engine.Most internal combustion engines are fluid cooled using either air (a gaseous fluid) or a liquid coolant run through a heat exchanger (radiator) cooled by air. Marine engines and some stationary engines have ready access to a large volume of water at a suitable temperature. The water may be used directly to cool the engine, but often has sediment, which can clog coolant passages, or chemicals, such as salt, that can chemically damage the engine. Thus, engine coolant may be run through a heat exchanger that is cooled by the body of water.
Most liquid-cooled engines use a mixture of water and chemicals such as antifreeze and rust inhibitors. The industry term for the antifreeze mixture is engine coolant. Some antifreezes use no water at all, instead using a liquid with different properties, such as propylene glycol or a combination of propylene glycol and ethylene glycol. Most "air-cooled" engines use some liquid oil cooling, to maintain acceptable temperatures for both critical engine parts and the oil itself. Most "liquid-cooled" engines use some air cooling, with the intake stroke of air cooling the combustion chamber. An exception is Wankel engines, where some parts of the combustion chamber are never cooled by intake, requiring extra effort for successful operation.
There are many demands on a cooling system. One key requirement is that an engine fails if just one part overheats. Therefore, it is vital that the cooling system keep all parts at suitably low temperatures. Liquid-cooled engines are able to vary the size of their passageways through the engine block so that coolant flow may be tailored to the needs of each area. Locations with either high peak temperatures (narrow islands around the combustion chamber) or high heat flow (around exhaust ports) may require generous cooling. This reduces the occurrence of hot spots, which are more difficult to avoid with air cooling. Air cooled engines may also vary their cooling capacity by using more closely-spaced cooling fins in that area, but this can make their manufacture difficult and expensive.

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Post: #5
Prepared by :-
Naimish hingu


I.C. Engine converts fuel energy into mechanical energy by combustion of fuel inside the cylinder.
During this high amount of heat is produced.
Working of cooling system is to take care of produced heat to operate engine.
The engine runs best when its coolant is about 200 degrees Fahrenheit (93 degrees Celsius). At this temperature:
The combustion chamber is hot enough to completely vaporize the fuel, providing better combustion and reducing emissions.
The oil used to lubricate the engine has a lower viscosity (it is thinner), so the engine parts move more freely and the engine wastes less power moving its own components around.
Metal parts wear less.
If engine temperature rise, then :
Strength of material decrease with increase in temperature.
Expansion of parts on high temperature.
Pre-ignition and detonation.
Property of lubricant may change on high temperature.
Air cooling system
Water cooling system.
The engine block is covered in aluminum fins that conduct the heat away from the cylinder. A forced air passes over these fins, which cools the engine by transferring the heat to the air.
The cooling system on water-cooled, circulates a fluid through pipes and passageways in the engine. As this liquid passes through the hot engine it absorbs heat, cooling the engine. After the fluid leaves the engine, it passes through a heat exchanger, or radiator, which transfers the heat from the fluid to the air blowing through the exchanger.

Water pump
Pressure cap
Thermo-syphon cooling
Forced or pump cooling
Cooling with thermostatic regulator
Pressurized water cooling
Evaporative cooling
Post: #6
to get information about the topic "cooling system in ic engines" full report ppt and related topic refer the link bellow
Post: #7
I am final year mechanical student
I need information about cooling system
Post: #8
To get full information or details of cooling system in i.c. engine,design aproach please have a look on the pages

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