For the most efficient centrifuging of...

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Question 1 of 2066636eee28f7522a1c51e863

For the most efficient centrifuging of residual fuels on motor vessels, the lower the viscosity of the fuel as achieved by preheating, the more efficiently solids and moisture can be removed. For planning purposes, what is the typically the recommended upper limit of preheating for residual fuel oil centrifugation on motor ships?

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Question 1 of 20

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🔍 Key Concepts

• Residual fuel oil properties and how viscosity changes with temperature • Manufacturer recommendations for centrifuge operating temperature limits • Difference between heating for separation vs heating for injection/combustion

💭 Think About

• Think about why there is an upper temperature limit for preheating fuel before the centrifuge. What problems might occur if you heat residual fuel too much? • Compare typical purifier operating temperatures with injection temperatures at the engine. Which range is this question likely referring to? • Consider standard marine engineering practice: at what temperature range do most fuel purifiers on motor ships normally operate for heavy fuel oil?

✅ Before You Answer

• Verify the typical operating temperature range for residual fuel oil purifiers (not the engine fuel injectors). • Check which option would keep fuel viscosity low enough for good separation but still below the danger of flashing, vapor formation, or damaging seals. • Confirm that the chosen temperature is consistent with common marine engineering texts and maker’s manuals for HFO centrifuges.

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