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

2.
LIQUID COOLING SYSTEM

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.
THERMOST
A
T
VAL
VE
 Its job is to block the
flow of coolant to the
radiator until the engine
has warmed up.

13.
Thermostat Closed Thermostat Open
When engine is cold When engine reaches the
specified temperature

14.
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.

15.
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

16.
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.