MAN B&W S65ME-C8.2-GI-TII, Project Manual

Page: 42 / 395

MAN B&W 2.04
Page 7 of 9
MAN Diesel 198 69 93-5.3 MAN B&W MC/MC-C/ME/ME-C/ME-B/-GI-TII engines
Example 2: Normal running conditions.
Engine coupled to fixed pitch propeller (FPP) and with shaft generator
M Specified MCR of engine
S Continuous service rating of engine
MP Specified MCR for propulsion
SP Continuous service rating of propulsion
SG Shaft generator power
178 05 488.9
In example 2 a shaft generator (SG) is installed, and therefore the service power of the engine also has to incorporate the extra shaft
power required for the shaft generator’s electrical power production.
In the figure, the engine service curve shown for heavy running incorporates this extra power.
The specified MCR M will then be chosen and the load diagram can be drawn as shown in the figure.
Engine speed, % of L
1
100%
Power, % of L
1
100%
7
5
4
1 2 6
1 2 6
Propulsion curve for fouled
hull and heavy weather
Engine
service
curve
7
M
S
SP
SG
SG
MP
Engine speed, % of L
1
100%
Power, % of L
1
100%
Propulsion curve for fouled
hull and heavy weather
Engine service curve for
fouled hull and heavy
weather incl. shaft
generator
4
1 2 6
M
S
SP
MP
3
5
7
3.3%M 5%M
5%L
1
3
L
1
L
2
L
3
L
4
L
1
L
2
L
3
L
4
Layout diagram Load diagram
Fig. 2.04.06: Normal running conditions. Engine coupled to a fixed pitch propeller (FPP) and with a shaft generator