Fuel System and Fuel Measurement - Decreasing Fuel Consumption and Exhaust Gas Emissions in Transportation - page 72

daily tank
IFO

daily tank
MDO

mixing tank MDO and IFO

steamer join

consumer

circuit pump
mix pre-
heater IFO

circuit pump MDO and IFO

circuit pump IFO

pre-heater steamer
viscosimeter

filling
conduit

separator

settling tank 1
IFO

settling tank 2
IFO

drain
valve

Fig. 4.10 Scheme of a fuel storage, pump and measuring system

In electronically regulated pumps, impulse receivers control the operation. The
feeding pump moves the fuel from the daily tank through a fine filter and a
consumption measuring gauge to the mixing tank. The circulation pump moves the
fuel from the mixing tank via a final pre-heater and viscosity measuring device to
the injection pumps of the engine [ 55 ].
The settling tanks contain a combined overflow and bleeding pipe. The surplus
fuel flows into the overflow tank, which is provided with connection to vents
leading to the atmosphere. The continuous control of the volatile hydrocarbon
concentration in the venting tube guarantees optimal safety; see Fig. 4.11 [ 56 ].

4.3.3 Fuel Planning on Ships

The average fuel system consists of a store, a provision, a preparation, and a
supply subsystem. The common quality of these subsystems determines the rate of
the fuel consumption [ 57 ].