Jacket Water System; Jacket Water Cooling Pump - Man B&W S80ME-C7 Project Manual

MAN B&W

Jacket water system

Due to the central cooler the cooling water inlet
temperature is about 4 °C higher for for this sys-
tem compared to the seawater cooling system.
The input data are therefore different for the scav-
enge air cooler, the lube oil cooler and the jacket
water cooler.
The heat dissipation and the central cooling water
flow figures are based on an MCR output at tropi-
cal conditions, i.e. a maximum seawater tempera-
ture of 32 °C and an ambient air temperature of
45 °C.

Jacket water cooling pump

The pumps are to be of the centrifugal type.
Jacket water flow ................ see 'List of capacities'
Pump head ...................................................3.0 bar
Delivery pressure ...............depends on location of
Test pressure .................... according to class rules
Working temperature ..................................... 80 °C
Design temperature ..................................... 00 °C
The flow capacity is to be within a tolerance of 0%
to +0%.
The stated of capacities cover the main engine
only. The pump head of the pumps is to be de-
termined on the basis of the total actual pressure
drop across the cooling water system.
Scavenge air cooler
The scavenge air cooler is an integrated part of
the main engine.
Heat dissipation .......................see 'List of capacities'
Central cooling water flow .......see 'List of capacities'
Central cooling temperature, inlet .................... 36 °C
Pressure drop on FWLT water side .... approx. 0.5 bar
MAN B&W MC/MCC, ME/ME-B/MEC/MEGI engines
expansion tank
MAN Diesel
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.
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 ...max. 0.2 bar
Central cooling water flow .... see 'List of capacities'
Central cooling water
temperature, inlet ..............................approx. 42 °C
Pressure drop on Central
cooling water side ................................max. 0.2 bar
The other data for the jacket cooling water system
can be found in chapter 2.
For further information about a common cooling
water system for main engines and MAN Diesel
auxiliary engines, please refer to our publication:
Uniconcept Auxiliary Systems for Twostroke Main
The publication is available at www.mandiesel.com
under 'Quicklinks' → 'Technical Papers'
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