The engine has two cooling water systems one high-temperature jacket water system
and one low temperature system only the high temperature system would be
described here the high temperature system is a freshwater cooling system
during operation or just after the engine has been stopped most of the
engine will be hot touching the engine parts may cause burns in this system be
especially aware of the following parts cooling water pipes may get up to 90
degrees Celsius the operator should always be aware of the high water
temperature when working with parts of the cooling water system pay attention
to how the additives are stored the additives to the cooling water may
involve a health risk especially when highly concentrated the operators are
responsible for keeping updated with the producers warnings on the containers or
data sheets parts of the engine to be cooled by the jacket water system is a
cylinder block the cylinder liners the cylinder heads and the turbocharger
control of cooling water quality is very important to prevent corrosion sediments
and surface growth in the jacket water cooling system it is important to use
inhibitors in the jacket water both for fresh water and for distilled water when
using inhibitors the service instructions have to be followed very
carefully with respect to the water quality supplement volume treatment and
storage changing high temperature cooling water empty and flush the
cooling system thoroughly before commencing treatment to remove as much
sludge and rest as possible if the system is exceptionally rusty
it is advisable to repeat this procedure after the first week or two of treatment
click the components for further information the jacket water pump is an
engine-driven centrifugal pump type it delivers water for cooling the
turbocharger and the high-temperature section of charge air cooler for engines
equipped with two stage charge air cooler the roller bearings are
lubricated by the main lube oil system
do not operate without proper water supply this will destroy the pump if
observing lubricating oil or water coming through the telltale hole replace
both sealing rings to ensure satisfactory sealing the heater module
consists of an electric pump with electric element the purpose of the
heater module is to keep the engine temperature at approximately 50 degrees
Celsius while the engine is in standby mode never operate without proper water
supply because that will destroy the ceramic seals in the pump immediately
the purpose of the regulating valve is to adjust the jacket water flow rate the
jacket water cooler removes heat from the jacket water and transfers it to the
raw seawater system the plate heat exchanger consists of edge clamped
frames within which a number of plates and gaskets are compressed
it is of great importance to inspect the high temperature water cooler during the
running in period in order to gain experience to determine the correct
intervals for cleaning when the call is out of operation for a longer period
empty it open it and clean it cleaning of the plates is important to restrict
corrosion and to keep the heat transfer rate at a maximum level plate exchangers
should be inspected and cleaned at regular intervals