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Piping between a service tank and a fuel transfer or booster Ships’ fuel is usually stored in double-bottom tanks,ĭeep tanks, side bunker tanks, settling tanks or service tanks. To deliver fuel from an injection pump to an engine combustionĬhamber. Low-pressure pipes are used to move fuel from a storage tank toĪ service tank to an injection pump high-pressure pipes are used There are two principal types of pipes that carry fuel and they areĬategorised by the pressure the pipe is designed to withstand. high pressure pipes between fuel injection pump and.pipes lagged/save-alls under pumps and heaters.quick closing valve on mixing/vent tank.Quick closing valves on settling/service tanks.Various safety devices in a fuel system for a diesel engine are: The most common system is the jerk pump the In use, each of which employs a combination of mechanical and This camshaft rotates at engine speed for a two-stroke engineĪnd at half engine speed for a four-stroke. The injection of the fuel is achieved by the location of cams on aĬamshaft. There must therefore be some form of measuredįuel supply, a means of timing the delivery and the atomisation of theįuel. Of fuel at the right moment and in a suitable condition for theĬombustion process.
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The function of the fuel injection system is to provide the right amount He is also to inform the Master of the procedures which will have to be carried out if the particular engine type’s maximum period at standstill during manoeuvring is exceeded. It is the Chief Engineer's responsibility to inform the Master of the particular engine type’s maximum period that it can safely remain in the stopped position. In the event of problems during manoeuvring on engines using heavy oil there must be no hesitation in changing over to diesel oil irrespective of whether the engines are being operated using bridge control, or using engine room control. All other types of main engines are to be manoeuvred on diesel oil according to the manufacturers’ instructions. Main engines designed to manoeuvre on heavy fuel oil are to be operated according to the manufacturer’s instructions. The system includes various safety devices such as low-level alarmsĪnd remotely operated tank outlet valves which can be closed in the The mixing tank is used to collect recirculated oil and also acts as aīuffer or reserve tank as it will supply fuel when the daily service tank is Manoeuvred on diesel oil or even a blend of diesel and heavy fuel oil. Pre-warming bypass is used to heat up the fuel before starting theĪ diesel oil daily service tank may be installed and is connected A pressure regulating valveĮnsures a constant-pressure supply to the engine-driven pumps, and a Provide the correct viscosity for combustion. The viscosity regulator controls the fuel oil temperature in order to The fuel pumps will discharge high-pressure fuel to their Through heaters and a viscosity regulator to the engine-driven fuel A flow meter is fitted into the system to From the daily service tank the oil flows through a In the system shown in Figure, the oil is stored in tanks in theĭouble bottom from which it is pumped to a settling tank and heated.Īfter passing through centrifuges the cleaned, heated oil is pumped to aĭaily service tank. On heavy fuel and have available a diesel oil supply for The overflow tank is led onto deck and fitted with wire gauzeįuel oil supply for a two-stroke diesel engine:Ī slow-speed two-stroke diesel is usually arranged to operate continuously Into machinery spaces which may lead to fires. This line also incorporates a flow alarm.įitted in the overflow tank is a level alarm which will beĪctivated when the tank is a quarter full.Īll tank vents are fitted so that oil cannot overflow onto deck or Settling tanks are used to permit gross water and solidsĪll tanks overflow to an overflow tank via a line w ith an Is so arranged that the pumps can transfer fuel between storage tanks and then to theĭeck connections for offloading. Settling tanks via FO transfer pumps which are equipped with a suction strainer. In preparation for use, HFO is transferred to the fuel oil