This section is available on request - MAN Diesel & Turbo

MAN B&W 6.01
Calculation of L<strong>is</strong>t of Capacities and Exhaust Gas Data
<strong>Th<strong>is</strong></strong> chapter describes the necessary auxiliary machinery
capacities to be used for a nominally rated
engine. The capacities given are valid for seawater
cooling system and central cooling water system,
respectively. For derated engine, i.e. with a specified
MCR and/or matching point different from the
nominally rated MCR point, the l<strong>is</strong>t of capacities
will be different from the nominal capacities.
Nomenclature
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Furthermore, among others, the exhaust gas data
depends on the ambient temperature conditions.
Based on examples for a derated engine, the way
of how to calculate the derated capacities, freshwater
production and exhaust gas amounts and
temperatures will be described in details.
In the following description and examples of the auxiliary machinery capacities, freshwater generator pro-
Engine ratings Point / Index Power Speed
Nominal MCR point L PL nL Specified MCR point M PM nM Matching point O PO nO Service point S PS nS Parameters
Q = Heat d<strong>is</strong>sipation
V = Volume flow
M = Mass flow
T = Temperature
air
Cooler index
scavenge air cooler
lub lube oil cooler
jw jacket water cooler
cent central cooler
Fig. 6.01.02: Nomenclature of coolers and volume flows, etc.
Engine configurations related to SFOC
ME/ME�C engines 198 43 33�5.2
MAN Diesel
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sw
Flow index
seawater flow
cw cooling/central water flow
exh exhaust gas
fw freshwater
For S70ME�C/ME�GI, L70ME�C, S65ME�C/ME�GI, S60ME�C/ME�GI, L60ME�C, S50ME�C
The engine type <strong>is</strong> <strong>available</strong> in the following two
versions with respect to the efficiency of the turbocharger:
• A) With high efficiency turbocharger, case A:
which <strong>is</strong> the basic design and for which the l<strong>is</strong>ts
of capacities Section 6.03 are calculated.
• B) With conventional turbocharger, case B:
Which <strong>is</strong> an optional design (EoD No. 4 59 07)
if a higher exhaust gas temperature <strong>is</strong> required
for the exhaust gas boiler. <strong>Th<strong>is</strong></strong> modification
will lead to a 7�8% reduction in the exhaust gas
amount and a temperature increase of about
20°C. The SFOC penalty will be 2 g/kWh, see
example in Fig. 6.0 .03. The corresponding l<strong>is</strong>ts
of capacities are shown in Section 6.03.
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198 96 82�4.5
Fig. 6.01.03: SFOC curves for (A) high efficiency and
(B) conventional turbochargers, respectively
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