The document discusses cooling systems in internal combustion engines, outlining their types, advantages, and disadvantages. It distinguishes between air cooling and liquid cooling systems, detailing their operation, benefits, and drawbacks. The conclusion emphasizes the importance of maintaining optimal temperatures for engine performance and preventing damage.

1. COOLING SYSTEMS
IN INTERNAL COMBUSTION ENGINE
Presented by
Group no-04

2. Represented By
Name ID
Joynal Abedin 12307088
Md. Riaziul Hasan 13307116
Md. Kawsar Alam 14107068
Md. Al Amin 14107070
Md. Shamim Hasan 14207113
Md. Mizanur Rahman 15207015
Md. Sujon Babu 15207019
Abdul Alim 15207038
Amit Mazumder 15207041
Md. Shahadat Hosen 15207052
Md. Enamul Haque 15207060

3. Table of Context
• What is Cooling system.
• Reasons for cooling.
• Effect for Over-Cooling.
• Types of Cooling system.
• Air cooling system.
• Advantages of Air-Cooling system.
• Disadvantages of Air-cooling system.
• Liquid cooling system.
• Types of Liquid Cooling system.
• Thermo Siphon System.
• Evaporative cooling system.
• Forced circulation cooling system.
• Non-Return Water Cooling System.
• Parts of Liquid System.
• Types of Radiator.
• Parts of cooling system.
• Advantages of Liquid Cooling System.
• Disadvantages of Liquid Cooling System.

4. What is it?
It is a system which is used to keep engine from getting
not too hot and at the same time not to keep it too
cool either.

5. Reasons for cooling
• To promote a high volumetric efficiency.
• To ensure proper combustion.
• To ensure mechanical operation.

6. Effect for Over-Cooling
• The thermal efficiency is decreased due to more loss of heat carried by
the coolant.
• The vaporization of the fuel is less resulting in lower combustion
efficiency.
• Low temperature increases the viscosity of lubricant causing more loss
due to friction.

7. Types of Cooling system
• Air cooling (or direct cooling) system.
• Liquid cooling (or indirect cooling) system.

8. Air Cooling System
Air cooled engines depend on airflow across their external surfaces of
the engine cylinders to remove the necessary heat. It is used for Small
Engines.
The amount of heat dissipated depends upon:
The area of cooling surface in contact with the air.
Mass flow rate of air.
Temperature difference between cylinder and air.
Conductivity of metal.

9. Advantages of Air-Cooling system
No need of radiator, cooling jackets, coolant and pumps.
The engine can be operated in cold climate where liquid may freeze.
In places where water is scarce , air cooled engine is an advantage.
Less weight and low cost.
Air cooled engines have no coolant leakage or freezing problems.

10. Disadvantages of Air-cooling system
 Large amount of power is used to drive the cooling fan.
 Engines give low power output.
 Cooling fins under certain conditions may vibrate and amplify the
noise level.
 Cooling is not uniform.

11. Liquid Cooling System
o A liquid (coolant) is circulated around the cylinders and absorb heat
from the cylinder walls and cylinder head.
o It is used for large Engines

12. Types of Liquid cooling systems
• Thermo-syphon system
• Forced circulation cooling system
• Evaporative cooling system
• Direct or non- return system

13. Thermo Siphon System
In this system the circulation of water is due to difference in temperature
of water. So in this system pump is not required but water is circulated
because of density difference only.

14. Evaporative cooling system
In this system , the engine will be cooled because of the evaporation of
the water in the cylinders into steams. It is used for cooling of many
types of industrial engines.

15. Forced circulation cooling system
This system is used in a large number of vehicles like cars, buses ,
trucks and other heavy vehicles . Here, circulation of water takes place
with convection currents helped by a pump.

16. Non-Return Water Cooling System
This is suitable for large installations and where plenty of water is
available. The water from a storage tank is directly supplied to the
engine cylinder. The hot water is not cooled for reuse but simply
discharges.

17. Parts of Liquid System
Water Pump
Cooling Fan
Radiator

18. Water pump
The purpose of a car water pump is to push coolant through the car's engine
block, radiator and hoses to get the engine heat away from the system. Most
frequently, the water pumpdrives off the crankshaft pulley or the crankshaft itself.

19. Types of Radiator
1. Gilled tube
2. Tubular
3. Honey comb

20. Parts of cooling system
Thermostat valve

21. Advantages of Liquid cooling system
Uniform cooling of cylinder, cylinder head and valves.
 fuel consumption of engine improves by using water cooling system.
 The Engine need not be provided at the front end of moving vehicle
because of cooling system.
 Engine is less noisy as compared with air cooled engines, as it has
water for damping noise.

22. Disadvantages of Liquid Cooling system
• It depends upon the supply of water.
• The water pump which circulates water absorbs considerable power.
• If the water cooling system fails then it will result in several damage
of engine.
• The water cooling system is costlier as it has more number of parts.
• Also it requires more maintenance and care for its parts.

23. ????
Questions Time
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24. Conclusion
A cooling system must be provided not only to prevent damage to
the vital parts of the engine (due to high temperature), but the
temperature of these components must be maintained within
certain limits in order to obtain maximum performance from the
engine.

25. THANK YOU