Man B&W S80ME-C7, Руководство по проекту

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S80ME-C 198 42 67-6.0
MAN B&W Diesel A/S 2.10
Page 1 of 2
Data at nominel MCR (L
1
): 6S80ME-C
Power 100% 23,280 kW
Speed 100% 76 r/min
Nominal SFOC:
High efficiency turbocharger 167 g/kWh
Data of specified MCR = M
1
M
2
Power 19,788 17,400 kW
Speed 68.4 65.6 r/min
SFOC found: 165.1 162.6 g/kWh
M
1
power is selected as 85% of L
1
= 19,788 kW
M
1
speed is selected as 90% of L
1
= 68.4 r/min
M
2
is in this example selected on the same
propeller curve as M
1
If the power of M
2
were selected as 75% of
L
1
= 17,460 kW and the corresponding speed is
86.3% of that in L
1
= 65.6 r/min
The savings in g/kWh compared to SFOC in L
1
:
Fig. 2.10.01: Examples of SFOC for different specified MCR points for 6S80ME-C with fixed pitch propeller,
high efficiency turbocharger
SFOC calculations, example
40% 50% 60% 70% 80% 90% 100% 110%
% of specified MCR
Nominal SFOC
Diagram a
Part Load SFOC curve
30%
g/kWh
SFOC
+4
+3
+2
+1
0
-1
-2
-3
-4
-5
-6
-7
-8
-9
-10
-11
-12
-13
-14
-15
-16
3
6
5
2
4
1
M
2
M
1
42.5
37.5 52.5
59.5
75
85
178 23 44-9.2
Power in Matching point
SFOC
saving
1 85% x 100% = 85.0% 1.9
M
1
= 85%
2 85% x 70% = 59.5% 6.7
of L
1
3 85% x 50% = 42.5% 3.2
4 75% x 100% = 75.0% 4.4
M
2
= 75%
5 75% x 70% = 52.5% 9.0
of L
1 6 75% x 50% = 37.5% 4.9