Diesel engine. Cooling. The coolants

1. Dia 1

mu

2. Dia 2

In a Diesel engine
the pistons and the cylinders
must be cooled by coolants.
Sea water
cools theoil,
coolants
Fresh
water,
air.
sound

3. Dia 3

COOLING THE PISTON
The piston rod is hollow.
When the piston goes
up and down,
the coolant (oil)
enters through the piston
rod bore and leaves
through the
inside return line.
Piston-rod bore
Inside return line

4. Dia 4

COOLING THE PISTON
The piston is cooled by oil.
The advantages of oil as
a coolant are:
. it reduces noise;
. it purifies;
. it forms a seal;
. it lubricates;
. it is anti-corrosive;
. it has a higher resistance
to heat.

5. Dia 5

COOLING THE CYLINDER
The cylinder is cooled by
injecting the
coolant between the
cylinder liner and
the cylinder jacket.
The most common coolant
is fresh water.
S
Liner
Jacket

6. Dia 6

COOLING THE COOLANTS
AIRCO
FW
STEAM
FW
A
FW
A
The cooling medium must
be cooled by sea water,
which is led into the ship
through sea-chests (A).

7. Dia 7

HEAT EXCHANGERS
In a heat exchanger the
hot coolant is cooled by
sea water.
SOUND

8. Dia 8

The
International Maritime Language Programme – IMLP
C
The IMLP is an IMO-standard.
P.C. van Kluijven