This section is available on request - MAN Diesel & Turbo
This section is available on request - MAN Diesel & Turbo
This section is available on request - MAN Diesel & Turbo
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<strong>MAN</strong> B&W 2.04<br />
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Line : Propeller curve through matching point (O) � layout<br />
curve for engine<br />
Line 2: Heavy propeller curve<br />
� fouled hull and heavy seas<br />
Line 3: Speed limit<br />
Line 3’: Extended speed limit, provided torsi<strong>on</strong>al vibrati<strong>on</strong><br />
c<strong>on</strong>diti<strong>on</strong>s permit<br />
Line 4: Torque/speed limit<br />
Line 5: Mean effective pressure limit<br />
Line 6: Increased light running propeller curve<br />
� clean hull and calm weather<br />
� layout curve for propeller<br />
Line 7: Power limit for c<strong>on</strong>tinuous running<br />
178 52 25�6.0<br />
Fig. 2.04.03: Extended load diagram for speed derated<br />
engine with increased light running<br />
Page 5 of<br />
Examples of the use of the Load Diagram<br />
In the following are some examples illustrating the<br />
flexibility of the layout and load diagrams and the<br />
significant influence of the choice of the matching<br />
point O.<br />
• Example shows how to place the load diagram<br />
for an engine without shaft generator coupled to<br />
a fixed pitch propeller.<br />
• Example 2 are diagrams for the same c<strong>on</strong>figurati<strong>on</strong>,<br />
but choosing a matching point <strong>on</strong> the left<br />
of the heavy running propeller curve (2) providing<br />
an extra engine margin for heavy running<br />
similar to the case in Fig. 2.04.03.<br />
• Example 3 shows the same layout for an engine<br />
with fixed pitch propeller (example ), but with a<br />
shaft generator.<br />
• Example 4 <str<strong>on</strong>g>is</str<strong>on</strong>g> a special case of example 3, where<br />
the specified MCR <str<strong>on</strong>g>is</str<strong>on</strong>g> placed near the top of the<br />
layout diagram.<br />
In th<str<strong>on</strong>g>is</str<strong>on</strong>g> case the shaft generator <str<strong>on</strong>g>is</str<strong>on</strong>g> cut off,<br />
and the GenSets used when the engine runs<br />
at specified MCR. <str<strong>on</strong>g>Th<str<strong>on</strong>g>is</str<strong>on</strong>g></str<strong>on</strong>g> makes it possible to<br />
choose a smaller engine with a lower power output.<br />
• Example 5 shows diagrams for an engine<br />
coupled to a c<strong>on</strong>trollable pitch propeller, with or<br />
without a shaft generator.<br />
• Example 6 shows where to place the matching<br />
point for an engine coupled to a c<strong>on</strong>trollable<br />
pitch propeller.<br />
For a specific project, the layout diagram for actual<br />
project shown later in th<str<strong>on</strong>g>is</str<strong>on</strong>g> chapter may be used<br />
for c<strong>on</strong>structi<strong>on</strong> of the actual load diagram.<br />
<strong>MAN</strong> B&W ME/ME-C/ME-GI engines 198 38 97-3.6<br />
<strong>MAN</strong> <strong>Diesel</strong>
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