Man B&W S80ME-C7 User Manual

MAN B&W 7.01
Page 3 of 3
MAN Diesel
MAN B&W ME/ME-B/MEC/MEGI engines 198 42 282.6
The HCU has a leakage drain from the support
console of clean fuel oil through ‘AD’.
The ow rate in litres is approximately as listed in
Table 7.0.0.
Heating of drain pipe
Owing to the relatively high viscosity of the heavy
fuel oil, it is recommended that the drain pipe and
the tank are heated to min. 50 °C, whereas the
HFO pipes as basic are heated by steam through
anges ‘BX’ and ‘BF’.
The drain pipe between engine and tank can
be heated by the jacket water, as shown in Fig.
7.0.0. ‘Fuel pipe heating’ as ange ‘BD’.
The size of the sludge tank is determined on the
basis of the draining intervals, the classication
society rules, and on whether it may be vented
directly to the engine room.
This drained clean oil will, of course, inuence the
measured SFOC, but the oil is thus not wasted,
and the quantity is well within the measuring ac-
curacy of the owmeters normally used.
For external pipe connections, we prescribe the
following maximum ow velocities:
Marine diesel oil .......................................... .0 m/s
Heavy fuel oil ............................................... 0.6 m/s
The fuel viscosity is inuenced by factors such as
emulsication of water into the fuel for reducing
the NO
x
emission. This is further described in sec-
tion 7.06.
An emulsication arrangement for the main en-
gine is described in our publication:
550-0063 ‘Operation on Heavy Residual Fuels
and Destilates. Guidelines for Fuels
and Lubes’
This publication is available at our Internet address:
www.mandiesel.com under ‘Quicklinks’ → ‘Tech-
nical Papers’, from where it can be downloaded.
Engine
Flow rate,
litres/cyl. h.
K08ME-C, K98ME/ME-C, S90ME-C .5
K90ME/ME-C, S/K80ME-C, S70ME-C/
ME-GI, L70ME-C, S65ME-C/ME-GI 0.75
S/L60ME-C, S60ME-GI, S50ME-C,
S50/40/35ME-B 0.60
The main purpose of the drain ‘AF’ is to collect
pure fuel oil from the fuel pumps as well as the
unintentional leakage from the high pressure
pipes. The drain oil is lead to a tank and can be
pumped to the Heavy Fuel Oil service tank or to
the settling tank.
The ‘AF’ drain is provided with a box for giving
alarm in case of leakage in a high pressure pipes.
Table 7.01.01: Approximate ow in HCU leakage drain.

Man B&W S80ME-C7 Specifications

General

Brand	Man
Model	B&W S80ME-C7
Category	Engine
Language	English