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JSPM’S
Rajarshi Shahu College of Engineering,
Pune
Department of Mechanical Engineering
T.Y. B. Tech
Heat Transfer
Seminar Topic :- Water Engine Cooling
Student Name :- Rajkumar Landage
Roll No. :- ME3422
LIQUID COOLING SYSTEM
LIQUID COOLING SYSTEM
▶ A liquid is circulated around the
cylinders and absorb heat from the
cylinder walls and cylinder head.
▶ Coolant absorbs heat as it passes
through the engine and also
lubricates the water pump.
▶ Hot coolant enters the radiator in
which the heat is passed on to air
that is flowing through the
radiator.
Working principle of water-
cooled system.
MERITS AND DEMERITS OF LIQUID
COOLING SYSTEM
▶ MERITS:
▶ Uniform cooling of cylinder, cylinder head and valves
▶ Specific fuel consumption of engine improves by using water cooling
system
▶ If we employ water cooling system, then engine need may not be
provided at the front end of moving vehicle.
▶ Engine is less noisy as compared with air cooled engines, as it has water
for damping noise
▶ DEMERITS:
▶ It depends upon the supply of water
▶ If the water cooling system fails then it will result in severe damage of
engine
▶ The water cooling system is costlier as it has more number of parts
TYPES OF WATER COOLED SYSTEM
Open Jacket
System
Thermo syphon
Cooling System
Forced
Circulation
Cooling System
OPEN JACKET SYSTEM
This system is used where plenty of water is available.
The water is supplied from large tank or river through
the inlet valve of cooling water jacket.
The main specification of this system is that Hot water
is not cooled but simply discharged.
THERMOSYPHON COOLING SYSTEM
 The basic principle of this system is based upon the
relative density of the water.
 The main advantage of this system is it’s simplicity and
automatic circulation of cooling water.
FORCED CIRCULATION SYSTEM
▶ This system is used in large number of automobiles like
Cars, tractor and even Heavy Trucks.
▶ Here flow of water from radiator to the water jackets is
assisted by pump.
• To supply the water forcely into the system
WATER PUMP
• To dissipates the heat from coolant
RADIATOR
• To provide strong draft of air through the radiator
F
AN
• Designed to keep engine block and cylinder head
cool.
WATER JACKETS
• T
o control the flow of coolant, it opens at 70
degree and fully open at 82 degree
THERMOSTAT VALVE
• To store the coolant
STORAGE TANK
COMPONENTS OF LIQUID COOLING
SYSTEM
RADIATOR
 Radiators
exchangers
transfer
are
used
heat
to
thermal
energy from one medium
to another for the purpose
of cooling and heating.
21
THERMOST
A
T
VAL
VE
 Its job is to block the
flow of coolant to the
radiator until the engine
has warmed up.
Thermostat Closed Thermostat Open
When engine is cold When engine reaches the
specified temperature
WATER JACKETS
water jackets are
the
▶ Cooling
provided
cylinder,
around
cylinder head,
valve
part
seats,
which
and any hot
are to be
cooled. Heat generated in
the cylinder is conducted to
the Jacket.
ANTIFREEZE MIXTURE
 countries antifreeze mixture are added to the cooling
water
 ▶ There are the following type of antifreeze mixtures :-
 ▶Ethylene glycol
 ▶Propylene glycol
 ▶Organic acid technology (OAT)
 ▶Hybrid organic acid technology (HOAT)
▶ To prevent the freezing of cooling water in western
Coolant/Anti-freeze
▶ Engine coolant is a mixture of water and
antifreeze/coolant.
▶ Water alone has a boiling point of 100°C and a freezing
point of 0°C at sea level.
▶ Engine coolant has a higher boiling temperature and a
lower freezing point than water.
▶ The exact boiling or freezing temperatures depend on
the mixture.
▶ The typical recommended mixture is a 50/50 solution of
water and antifreeze/coolant.
Water Engine Cooling System: Types and Working

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Water Engine Cooling System: Types and Working

  • 1. 1 JSPM’S Rajarshi Shahu College of Engineering, Pune Department of Mechanical Engineering T.Y. B. Tech Heat Transfer Seminar Topic :- Water Engine Cooling Student Name :- Rajkumar Landage Roll No. :- ME3422
  • 3. LIQUID COOLING SYSTEM ▶ A liquid is circulated around the cylinders and absorb heat from the cylinder walls and cylinder head. ▶ Coolant absorbs heat as it passes through the engine and also lubricates the water pump. ▶ Hot coolant enters the radiator in which the heat is passed on to air that is flowing through the radiator.
  • 4. Working principle of water- cooled system.
  • 5. MERITS AND DEMERITS OF LIQUID COOLING SYSTEM ▶ MERITS: ▶ Uniform cooling of cylinder, cylinder head and valves ▶ Specific fuel consumption of engine improves by using water cooling system ▶ If we employ water cooling system, then engine need may not be provided at the front end of moving vehicle. ▶ Engine is less noisy as compared with air cooled engines, as it has water for damping noise ▶ DEMERITS: ▶ It depends upon the supply of water ▶ If the water cooling system fails then it will result in severe damage of engine ▶ The water cooling system is costlier as it has more number of parts
  • 6. TYPES OF WATER COOLED SYSTEM Open Jacket System Thermo syphon Cooling System Forced Circulation Cooling System
  • 7. OPEN JACKET SYSTEM This system is used where plenty of water is available. The water is supplied from large tank or river through the inlet valve of cooling water jacket. The main specification of this system is that Hot water is not cooled but simply discharged.
  • 8. THERMOSYPHON COOLING SYSTEM  The basic principle of this system is based upon the relative density of the water.  The main advantage of this system is it’s simplicity and automatic circulation of cooling water.
  • 9. FORCED CIRCULATION SYSTEM ▶ This system is used in large number of automobiles like Cars, tractor and even Heavy Trucks. ▶ Here flow of water from radiator to the water jackets is assisted by pump.
  • 10. • To supply the water forcely into the system WATER PUMP • To dissipates the heat from coolant RADIATOR • To provide strong draft of air through the radiator F AN • Designed to keep engine block and cylinder head cool. WATER JACKETS • T o control the flow of coolant, it opens at 70 degree and fully open at 82 degree THERMOSTAT VALVE • To store the coolant STORAGE TANK COMPONENTS OF LIQUID COOLING SYSTEM
  • 11. RADIATOR  Radiators exchangers transfer are used heat to thermal energy from one medium to another for the purpose of cooling and heating. 21
  • 12.
  • 13. THERMOST A T VAL VE  Its job is to block the flow of coolant to the radiator until the engine has warmed up.
  • 14. Thermostat Closed Thermostat Open When engine is cold When engine reaches the specified temperature
  • 15. WATER JACKETS water jackets are the ▶ Cooling provided cylinder, around cylinder head, valve part seats, which and any hot are to be cooled. Heat generated in the cylinder is conducted to the Jacket.
  • 16. ANTIFREEZE MIXTURE  countries antifreeze mixture are added to the cooling water  ▶ There are the following type of antifreeze mixtures :-  ▶Ethylene glycol  ▶Propylene glycol  ▶Organic acid technology (OAT)  ▶Hybrid organic acid technology (HOAT) ▶ To prevent the freezing of cooling water in western
  • 17. Coolant/Anti-freeze ▶ Engine coolant is a mixture of water and antifreeze/coolant. ▶ Water alone has a boiling point of 100°C and a freezing point of 0°C at sea level. ▶ Engine coolant has a higher boiling temperature and a lower freezing point than water. ▶ The exact boiling or freezing temperatures depend on the mixture. ▶ The typical recommended mixture is a 50/50 solution of water and antifreeze/coolant.