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The fuel oil system for a marine diesel engine can be considered in two parts: the fuel supply and the fuel injection systems. Fuel supply refers to the supply of fuel oil suitable for use by the injection system. The marine fuel oil system includes various piping systems for fuel oil supply, storage, transfer, discharge and treatment.

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When your oil burner is engaged, heating oil travels from the tank to the burner by way of a pump where it becomes a fine mist mixed with air. The fuel/air mixture is then injected into the burner where it is ignited in the combustion chamber.

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STORAGE AND TRANSFER OF FUEL OIL SYSTEM ON BOARD

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STORAGE AND TRANSFER OF FUEL OIL SYSTEM ON BOARD

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When heavy fuel oil is bunkered, it is stored in the ship’s bunker tanks. These tanks are of varying shapes, sizes, and capacities depending on the ship size, construction, and trade. The illustration below shows a basic filling, transfer, storage, and fuel oil purification system for a heavy fuel oil propulsion plant.

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Safety devices in a fuel system for a diesel engine 

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Safety devices in a fuel system for a diesel engine 

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1. Quick closing valves on settling/service tanks

2. relief valves on 2 pumps/heaters

3. quick closing valve on mixing/vent tank

4. pipes lagged/save-alls under pumps and heaters

5. low fuel oil pressure alarm

6. high fuel oil pressure alarm

7. low fuel oil temperature alarm

8. high fuel oil temperature alarm

9. emergency remote stops for pumps

10. high pressure pipes between fuel injection pump and injector are double skinned.