5) Correction for exhaust gas back
pressure
Increased negative intake pressure before com-
pressor leads to increased fuel oil consumption,
calculated as increased air temperature before tur-
bocharger:
U = (-20 [mbar] – p
Air before compressor
[mbar] ) x 0.25 [K/
mbar] with U ≥ 0
Increased exhaust gas back pressure after turbine
leads to increased fuel oil consumption, calculated
as increased air temperature before turbocharger:
O = (p
Exhaust after turbine
[mbar] – 30 [mbar] ) x 0.25 [K/
mbar] with O ≥ 0
Charge air blow-off for exhaust gas temperature
control (ex. plants with catalyst) leads to increased
fuel oil consumption:
For every increase of the exhaust gas temperature
by 1° C, due to activation of charge air blow-off
device, an addition of 0.05 g/kWh to be considered.
6) Correction for MGO (+2 g/kWh)
When engine is running MGO the fuel consumption
can be increased by up to +2 g/kWh due to lower
energy content and longer injection duration.
SFOC can in some case also be reduced by inver-
ted fuel values of MGO.
MAN Diesel & Turbo
B1101 0
Calculation of specific fuel oil consumption (SFOC)
3700405-6.2
Page 4 (4)
V28/32S-DF, L28/32S-DF, L28/32DF, L23/30S-DF, L23/30DF, V28/32S, L28/32S,
L27/38S, L23/30S, L21/31S, L16/24S, L16/24, L21/31, L23/30H, L27/38, L28/32H
Summary of Contents for L23/30DF
Page 1: ...L27 38S Project Guide Power Plant Four stroke GenSet...
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Page 9: ...MAN Diesel Turbo I 00 Introduction Page 1 1 I 00 Introduction 2018 04 13 en...
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Page 31: ...MAN Diesel Turbo D 10 General information Page 1 1 D 10 General information 2018 04 13 en...
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Page 59: ...MAN Diesel Turbo B 10 Basic diesel engine Page 1 1 B 10 Basic diesel engine 2018 04 13 en...
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Page 85: ...MAN Diesel Turbo B 11 Fuel oil system Page 1 1 B 11 Fuel oil system 2018 04 13 en...
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Page 173: ...MAN Diesel Turbo B 13 Cooling water system Page 1 1 B 13 Cooling water system 2018 04 13 en...
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Page 207: ...MAN Diesel Turbo B 14 Compressed air system Page 1 1 B 14 Compressed air system 2018 04 13 en...
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Page 217: ...MAN Diesel Turbo B 15 Combustion air system Page 1 1 B 15 Combustion air system 2018 04 13 en...
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Page 227: ...MAN Diesel Turbo B 16 Exhaust gas system Page 1 1 B 16 Exhaust gas system 2018 04 13 en...
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Page 269: ...MAN Diesel Turbo B 17 Speed control system Page 1 1 B 17 Speed control system 2018 04 13 en...
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Page 293: ...ENGINE AUTOMATION MAN Diesel Turbo SE SaCoSone GENSET System description Revision 1 5...
Page 306: ...MAN Diesel Turbo SaCoSone GENSET SaCoSone GENSET Communication from GenSet Revision 1 7...
Page 309: ...MAN Diesel Turbo Table of Contents...
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Page 327: ...MAN Diesel Turbo B 20 Foundation Page 1 1 B 20 Foundation 2018 04 13 en...
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Page 335: ...MAN Diesel Turbo B 21 Test running Page 1 1 B 21 Test running 2018 04 13 en...
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Page 341: ...MAN Diesel Turbo E 23 Spare parts Page 1 1 E 23 Spare parts 2018 04 13 en...
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Page 351: ...MAN Diesel Turbo P 24 Tools Page 1 1 P 24 Tools 2018 04 13 en...
Page 379: ...MAN Diesel Turbo B 50 Alternator Page 1 1 B 50 Alternator 2018 04 13 en...
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