WinGD X72DF, Руководство по установке

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Marine Installation Manual 2021-08 4-68
4 Ancillary Systems
4.6 Fuel oil system
X72DF
Booster pump — High-pressure fuel oil
The fuel oil booster pump delivers the fuel to the engine via a fuel oil end-heater
for HFO operation.
End-heater
Operation is regulated with either the temperature or the viscosity (default mode)
of the fuel oil. The viscosity is measured by the viscometer.
Type Positive displacement screw pump with built-in safety valve
Capacity
According to GTD : The flow rate is to be within a tolerance of
0 to +20% of the GTD value, plus back-flushing flow of auto -
matic self-cleaning filter, if such filter is installed.
Inlet pressure Up to 6bar
Delivery head
Final delivery pressure according to actual piping layout.
Refer to GTD .
Electric motor The electric motor driving the HP booster pump must be
sized large enough for the power absorbed by the pump at
maximum pressure head (difference between inlet and outlet
pressure), maximum fuel oil viscosity (70cSt), and the re -
quired flow.
Working temperature Up to 150°C
Type Tubular or plate type heat exchanger, suitable for heavy oils
up to 700cSt at 50°C (or as project is defined)
Heating source Steam, electricity, or thermal oil
Consumption of saturated
steam
At 7bar gauge pressure [kg/h]:
1.32 • 10
-6
• CMCR • BSFC • ( T
1
- T
2
)
where:
— BSFC = brake specific fuel consumption at contracted
maximum continuous rating ( CMCR )
— T
1
= temperature of fuel oil at viscometer
a)
— T
2
= temperature of fuel oil from service tank
a) The viscosity is maintained by regulating the fuel temperature after the end-heater.
Heating capacity [kW] 0.75 • 10
-6
• CMCR • BSFC • ( T
1
- T
2
)
Working pressure Max. 12bar, pulsating on fuel oil side
Working temperature Up to 150°C, outlet temperature on fuel oil side