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MAN B&W 2.04
Example 2: Special running conditions.
Engine coupled to fixed pitch propeller (FPP) and without shaft generator
Layout diagram Load diagram
Power, % of L1 100% 7
L 3
L 4
Engine speed, % of L 1
M Specified MCR of engine
S Continuous service rating of engine
O Matching point of engine
A Reference point of load diagram
MP Specified MCR for propulsion
SP Continuous service rating of propulsion
In th<strong>is</strong> example, the matching point O has been selected more
to the left than in example 1, providing an extra engine margin
for heavy running operation in heavy weather conditions. In
principle, the light running margin has been increased for th<strong>is</strong>
case.
MAN B&W ME/ME-C/ME-B/-GI-TII engines
5
4
1 2 6
1 2 6
A=O
S=SP
M=MP 7
Propulsion and engine
service curve for fouled
hull and heavy weather
100%
L 1
L 2
MAN Diesel
Power, % of L1 100%
L 3
L 4
4
1 2 6
Engine speed, % of L 1
3.3%A 5%A
A=O
5
7
M
Propulsion and engine
service curve for fouled
hull and heavy weather
Page 7 of 10
100%
Point A of load diagram <strong>is</strong> found:
Line 1 Propeller curve through matching point (O)
placed to the left of line 2
Line 7 Constant power line through specified MCR (M)
Point A Inter<strong>section</strong> between line 1 and 7
S
3
L 1
5%L 1
L 2
3
178 05 46�4.8
Fig. 2.04.05: Special running conditions. Engine coupled to a fixed pitch propeller (FPP) and without a shaft generator
198 69 93-5.1