Man B&W S50ME-B9.3-TII, Project Manual

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MAN B&W 12.04
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MAN Diesel
MAN B&W MC/MCC, ME/MEC/MEGI/ME-B engines 198 39 811.3
Components for Seawater Cooling System
Scavenge air cooler
The scavenge air cooler is an integrated part of
the main engine.
Heat dissipation ................. see ‘List of Capacities’
Seawater flow .................... see ‘List of Capacities’
Seawater temperature,
for seawater cooling inlet, max. ..................... 32 °C
Pressure drop on
cooling water side ........... between 0.1 and 0.5 bar
The heat dissipation and the seawater flow are
based on an MCR output at tropical conditions,
i.e. seawater temperature of 32 °C and an ambient
air temperature of 45 °C.
Seawater thermostatic valve
The temperature control valve is a threeway valve
which can recirculate all or part of the seawater to
the pump’s suction side. The sensor is to be locat-
ed at the seawater inlet to the lubricating oil cooler,
and the temperature level must be a minimum of
+10 °C.
Seawater flow ..................... see ‘List of Capacities’
Temperature range,
adjustable within .................................+5 to +32 °C
Seawater cooling pump
The pumps are to be of the centrifugal type.
Seawater flow ..................... see ‘List of Capacities’
Pump head ...................................................2.5 bar
Test pressure ...................... according to class rule
Working temperature .................... maximum 50 °C
The flow capacity must be within a range from
100 to 110% of the capacity stated.
Lubricating oil cooler
See Chapter 8 ‘Lubricating Oil’.
Jacket water cooler
The cooler is to be of the shell and tube or plate
heat exchanger type, made of seawater resistant
material.
Heat dissipation ................. see ‘List of Capacities’
Jacket water flow ............... see ‘List of Capacities’
Jacket water temperature, inlet ...................... 80 °C
Pressure drop
on jacket water side ....................maximum 0.2 bar
Seawater flow ..................... see ‘List of Capacities’
Seawater temperature, inlet .......................... 38 °C
Pressure drop on
seawater side ..............................maximum 0.2 bar
The heat dissipation and the seawater flow are
based on an MCR output at tropical conditions,
i.e. seawater temperature of 32 °C and an ambient
air temperature of 45 °C.