WÄRTSILÄ 31SG, Руководство по эксплуатации продукта, Страница: 15 / 132

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2. Operating Ranges
2.1 Engine operating range
Running below nominal speed the load must be limited according to the diagrams in this
chapter in order to maintain engine operating parameters within acceptable limits.
Operation in the shaded area is permitted only temporarily during transients. Minimum
speed is indicated in the diagram, but project specific limitations may apply.
2.2
Loading capacity
Controlled load increase is essential for highly supercharged engines as the turbocharger
needs time to accelerate before it can deliver the required amount of air. A slower loading
ramp than the maximum capability of the engine permits a more even temperature
distribution in engine components during transients.
The engine can be loaded immediately after start, provided that the engine is pre-heated
to:
● High Temperature (HT) water temperature is minimum 70°C
● Lubricating oil temperature is minimum 40°C
The ramp for normal loading applies to engines that have reached normal operating
temperature.