Marine Installation Manual 2022-03 4-13
4 Ancillary Systems
4.3 Cooling water system
X62DF-S2.0
Low-temperature circuit components
Seawater
circulating pump
The seawater circulating pump delivers seawater from the high and low sea
chests to the central seawater cooler.
Seawater strainer
Simplex or duplex strainers to be fitted at each sea chest and arranged to enable
manual cleaning without interrupting the flow. The strainer mesh size (max.
6mm) must prevent the passage of large particles and debris that could damage
the pumps and impair the heat transfer across the coolers.
Central seawater cooler
Pump type Centrifugal
Capacity According to GTD: The seawater flow capacity covers the
need of the engine only and is to be within a tolerance of
0 to + 10 % of the GTD value
Delivery pressure Determined by system layout
Working temperature According to ship specification
Cooler type Plate or tubular
Cooling medium Seawater
Cooled medium Freshwater
Design criterion Keeping max. 36 °C LT while seawater temp. is 32°C
Margin for fouling 10-15 % to be added
Heat dissipation
Refer to GTD
Freshwater flow
Seawater flow
Temperatures
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