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jacket water outlet expansion tank inlet heat exchanger inlet cooling water pump outlet
regulating the level of corrosion inhibitor in the primary cooling system the level of the freshwater expansion tank varying the engine load to meet temperature requirements the operation of the thermostatic valve
improper venting of the cooling system carrying the expansion tank water level too high a totally clogged impeller in the cooling water pump an incorrectly set cooling system temperature control
bearing pressure in a four-stroke\cycle acting single diesel engine is continuallyreversed bearing pressure in a two-stroke\cycle single acting diesel engine is continuallyreversed the maximum bearing pressure is higher in a single acting two-stroke/cycle dieselengine two-stoke/cycle diesel engines require more complicated lubrication piping
Defective temperature controls in the system Cavitation in the cooling water pump Opened vent in the cooling system Restricted water passages in the engine
camshaft piston movement exhaust valves vertical drive
one half crankshaft speed in a two-stroke cycle diesel engine crankshaft speed in a two-stroke cycle diesel engine two times crankshaft speed in a two-stroke cycle diesel engine one-fourth times crankshaft speed in a four-stroke cycle diesel engine
6.0 to7.5 8.0 to 9.5 10.0 to 11.5 12.0 to 13.5
jacket water outlet cooling water pump outlet heat exchanger outlet expansion tank atmospheric vent
the highest point in the system the lowest point in the system near the floor plate level or near the tank top level
most critical in a four-stroke cycle diesel engine most critical in a two-stroke/cycle diesel engine most critical in a four-stroke/cycle diesel engine if it is turbocharged of equal importance in a two-stroke/cycle diesel engine as in a four-stroke/cyclediesel engine
a broken shaft on the freshwater pump an excessive accumulation of scale exchanger an incorrect thermostatic element operating range lube oil in the cooling water
principle principal cause case
ignition lag engine horsepower lube oil system pressure specific fuel consumption
reduce water temperature reduce water turbulence provide an air cushion allow for an increase in water volume as the engine warms up
loss of suction in the circulating pump leak in the primary cooling system broken raw water pump shaft burned or cracked piston in one cylinder
fresh water expansion tank sea water expansion tank thermostatic expansion valve jacket water cooler accumulator
the formation of sulfuric acid a decrease in lube oil viscosity a decrease in cooling water pH a thermostat failure
Diesel engine propulsion Diesel electric propulsion Steam engine propulsion Gas turbine propulsion
reciprocating motion of exhaust valves rotary motion of the camshaft reciprocating motion of the piston developed differential
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