Resulting installation demands
If the recommended exhaust gas back pressure
cannot be kept due to exhaust gas after treatment
installations. Following items need to be consid-
ered.
Exhaust gas back pressure after turbocharger
Operating pressure Δp
exh
, standard
0 ... 30 mbar
Operating pressure Δp
exh
, range with increase of fuel consumption
30 ... 60 mbar
Operating pressure Δp
exh
, where a customized engine matching is needed
> 60 mbar
Table 1: Exhaust gas back pressure after turbocharger
Intake air pressure turbocharger
Operating pressure Δp
intake
, standard
0 ... –20 mbar
Operating pressure Δp
intake
, range with increase of fuel consumption
–20 ... –40 mbar
Operating pressure Δp
intake
, where a customized engine matching is needed
< –40 mbar
Table 2: Intake air pressure turbocharger
Sum of the exhaust gas back pressure after turbocharger and the absolute value of the intake air pressure before
turbocharger
Operating pressure Δp
exh
+ Abs(Δp
intake
), standard
0 ... 50 mbar
Operating pressure Δp
exh
+ Abs(Δp
intake
), range with increase of fuel consumption
50 ... 100 mbar
Operating pressure Δp
exh
+ Abs(Δp
intake
), where a customized engine matching is needed
> 100 mbar
Table 3: Sum of the exhaust gas back pressure after turbocharger and the absolute value of the intake air pressure before turbocharger
Maximum exhaust gas pressure drop – Layout
▪
Shipyard and supplier of equipment in exhaust
gas line have to ensure that pressure drop Δp
exh
over entire exhaust gas piping incl. pipe work,
scrubber, boiler, silencer, etc. must stay below
stated standard operating pressure at all oper-
ating conditions.
▪
It is recommended to consider an additional
10 mbar for consideration of aging and possible
fouling/staining of the components over lifetime.
▪
Possible counter measures could be a proper
dimensioning of the entire flow path including all
installed components or even the installation of
an exhaust gas blower if necessary.
▪
At the same time the pressure drop Δp
intake
in
the intake air path must be kept below stated
standard operating pressure at all operating
conditions and including aging over lifetime.
MAN Diesel & Turbo
B 16 00 0
Exhaust gas system
1655213-2.6
Page 4 (4)
L28/32S, L27/38S, L23/30S, L21/31S, L16/24S, L23/30DF, L28/32DF, L16/24,
L21/31, L23/30H, L27/38, L28/32H
2015.01.14
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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