The differences between HFO 1 and HFO 2 are seen below:
Fuel characteristics, maximum limits
HFO 1
HFO 2
Sulphur
mass-%
2.0
2.0 - 5.0
Ash
mass-%
0.05
0.05 - 0.20
Vanadium
mg/kg
100
100 - 600
Sodium
mg/kg
50
50 - 100
Sodium, bef. engine
mg/kg
30
30
Alu Silicon
mg/kg
30
30 - 80
Alu Silicon, bef.
engine
mg/kg
15
15
Conradson Carbon Residue
mass-%
15
15 - 22
Asphaltenes
mass-%
8
8 - 14
CCAI
850
850 - 870
Foreign substances or chemical waste, hazardous to the safety of
the installation or detrimental to the performance of engines, should
not be contained in the fuel.
Note! If any of specified fuel properties exceed HFO 1 maximum value
the fuel should be classified as HFO 2.
02.1.4 Comments on fuel characteristics
a)
The viscosity
is not a measure of the fuel quality, but determines the
complexity of the fuel heating and handling system, as a heavy fuel oil
has to be heated to reach a viscosity of 16 - 24 cSt at the point of
injection. At low viscosities, the flow past the plunger in the injection
pump increases. This leads to a decrease in the amount of injected
fuel, which in bad cases might make it impossible to reach full
engine output.
The standard engine fuel system is laid out for max. 55 cSt at 100
°C fuel (approx. 730 cSt at 50 °C, approx. 7200 Redwood No.1
seconds at 100 °F).
b)
The density
influences mainly on the fuel separation. Separators
can remove water and to some extent solid particles from fuels
having densities of up to 991 kg/m
3
at 15 °C. There are also separa-
tors on the market that can clean fuel with densities of up to 1010
kg/m
3
at 15 °C.
The separator capability must be checked before purchasing a fuel
with a very high density, as a bad separation will lead to abnormal
wear due to unremoved particles and water. The separator disc
must be chosen according to the fuel density.
Caution! Fuels having a low viscosity in combination with a high density
usually have bad ignition properties!
Fuel, Lubricating Oil, Cooling Water
200549-01
02 - 6
W20/W32/W46, W46F, 32, 32LN
Содержание PAAE051728
Страница 4: ......
Страница 18: ...Appendix B Welding Precautions 200640 00 6...
Страница 26: ...01 Main Data Operating Data and General Design 32 200634 01 01 8 W RTSIL 32...
Страница 60: ...Appendix A Environmental Hazards 200507 02A 10...
Страница 68: ...Page 7 7 Document No 4V92A0645 Rev j...
Страница 84: ...03 Start Stop and Operation 32 200402 04 03 12 W RTSIL 32...
Страница 98: ...04 Maintenance Schedule 32 200623 01 04 14 W RTSIL 32...
Страница 154: ...07 Tightening Torques and Use of Hydraulic Tools 32 200643 01 07 30 W RTSIL 32...
Страница 162: ...08 Operating Troubles Emergency Operation 32 200402 01 08 8 W RTSIL 32...
Страница 164: ...Specific Installation Data 2005 01 09 2...
Страница 178: ...10 Engine Block with Bearings Oil Sump and Cylinder Liner 32 200150 10 14 W RTSIL 32 34SG...
Страница 216: ...Appendix A Testing of cylinder tightness 32 200142 A 4 W rtsil 20 32 34...
Страница 226: ...13 Camshaft Driving Gear 32 200546 02 13 10 W RTSIL 32...
Страница 253: ...U tube manometer Fig 15 12 401508200050 32 200549 10 Turbocharging and Air Cooling 15 W RTSIL 32 15 19...
Страница 254: ...15 Turbocharging and Air Cooling 32 200549 10 15 20 W RTSIL 32...
Страница 274: ...16 Injection System 32 200627 01 16 20 W RTSIL 32...
Страница 280: ...Fuel System 32 200508 07 17 6 W RTSIL 32...
Страница 314: ...19 Cooling Water System 32 200050 19 14 W RTSIL 32...
Страница 394: ...23 Instrumentation and Automation 32 200115 II 23 60 W RTSIL 32...