Man B&W S50ME-B9.3-TII - Page 51

MAN B&W 2.10
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MAN Diesel
MAN B&W S50ME-B9.3-TII 198 87 82-5.0
Fig. 2.10.01: Example of SFOC for derated 6S50ME-B9.3 with fixed pitch propeller and high efficiency turbocharger
40% 50% 60% 70% 80% 90% 100% 110%
Nominal SFOC
Diagram a
Part Load SFOC curve
30%
% of specified MCR
SFOC
g/kWh
+1
+2
+3
+4
+5
+6
0
-1
-2
-3
-4
-5
-6
-7
-8
-9
-10
-11
g/kWh
SFOC
165
160
168
170
80%
Constant ship speed lines
105%
40%
50%
60%
70%
80%
90%
100%
Power, % of L
1
Speed, % of L
1
75% 80% 85% 90% 95% 100%
Nominal propeller curve
=0.15
=0.25
=0.20
=0.30
mep
100%
95%
85%
90%
50% SMCR
80% SMCR
100% SMCR
-1 -2 -3 -4 -5
-3 -4 -5 -6 -7 -8 -9
0 -1 -2 -3 -4 -5 -6
Reduction of SFOC in g/kWh relative to the nominal in L
1
90%
95%
M
Diagram b
178 65 00-5.0
178 65 03-0.0
The reductions, see diagram b, in g/kWh compared to
SFOC in L
1
:
Part load points
SFOC
g/kWh
SFOC
g/kWh
1 100% M -1.6 166.4
2 80% M -4.4 163.6
3 50% M -1.6 166.4