MAN B&W
15.04
Page 1 of 2
MAN Diesel
198 40 758.7
MAN B&W MC/MCC, ME/MEC/MEGI/ME-B engines
Components of the Exhaust Gas System
Exhaust gas boiler
Engine plants are usually designed for utilisation of
the heat energy of the exhaust gas for steam pro-
duction or for heating the thermal oil system. The
exhaust gas passes an exhaust gas boiler which is
usually placed near the engine top or in the funnel.
It should be noted that the exhaust gas tempera-
ture and flow rate are influenced by the ambient
conditions, for which reason this should be con-
sidered when the exhaust gas boiler is planned. At
specified MCR, the maximum recommended pres-
sure loss across the exhaust gas boiler is normally
150 mm WC.
This pressure loss depends on the pressure losses
in the rest of the system as mentioned above.
Therefore, if an exhaust gas silencer/spark ar-
rester is not installed, the acceptable pressure loss
across the boiler may be somewhat higher than the
max. of 150 mm WC, whereas, if an exhaust gas
silencer/spark arrester is installed, it may be neces-
sary to reduce the maximum pressure loss.
The above mentioned pressure loss across the
exhaust gas boiler must include the pressure
losses from the inlet and outlet transition pieces.
Fig. 15.04.01a: Exhaust gas system, one turbocharger
178 42 783.2
Exhaust gas compensator after turbocharger
When dimensioning the compensator, option:
4 60 610, for the expansion joint on the turbochar-
ger gas outlet transition piece, option: 4 60 601,
the exhaust gas piece and components, are to be
so arranged that the thermal expansions are ab-
sorbed by expansion joints. The heat expansion of
the pipes and the components is to be calculated
based on a temperature increase from 20 °C to
250 °C. The max. expected vertical, transversal
and longitudinal heat expansion of the engine
measured at the top of the exhaust gas transition
piece of the turbocharger outlet are indicated in
Fig. 15.06.01 and Table 15.06.02 as DA, DB and DC.
The movements stated are related to the engine
seating, for DC, however, to the engine centre. The
figures indicate the axial and the lateral movements
related to the orientation of the expansion joints.
The expansion joints are to be chosen with an elas-
ticity that limits the forces and the moments of the
exhaust gas outlet flange of the turbocharger as
stated for each of the turbocharger makers in Table
15.06.04. The orientation of the maximum permis-
sible forces and moments on the gas outlet flange
of the turbocharger is shown in Fig. 15.06.03.
Turbocharger gas
outlet flange
D4
D4
D4
D4
Exhaust gas outlet
to the atmosphere
Slide support
Fixed support
Exhaust gas compensator
Main engine with turbochargers
on exhaust side
Transition piece
Exhaust gas
silencer
Exhaust gas
boiler
D0
Fig. 15.04.01b: Exhaust gas system, two or more TCs
178 33 467.4
Exhaust gas outlet
to the atmosphere
Slide support
Fixed support
Exhaust gas compensator
Main engine with
turbocharger on aft end
D0
D0
D0
Exhaust gas
silencer
Exhaust gas
boiler
Summary of Contents for B&W L35MC6-TII
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Page 19: ...MAN B W MAN Diesel Engine Design 1 ...
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Page 35: ...MAN B W MAN Diesel Engine Layout and Load Diagrams SFOC 2 ...
Page 36: ......
Page 52: ......
Page 64: ......
Page 65: ...MAN B W MAN Diesel Turbocharger Selection Exhaust Gas By pass 3 ...
Page 66: ......
Page 72: ......
Page 73: ...MAN B W MAN Diesel Electricity Production 4 ...
Page 74: ......
Page 95: ...MAN B W MAN Diesel Installation Aspects 5 ...
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Page 132: ......
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Page 147: ...MAN B W MAN Diesel List of Capacities Pumps Coolers Exhaust Gas 6 ...
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Page 171: ...MAN B W MAN Diesel Fuel 7 ...
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Page 187: ...MAN B W MAN Diesel Lubricating Oil 8 ...
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Page 203: ...MAN B W MAN Diesel Cylinder Lubrication 9 ...
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Page 213: ...MAN B W MAN Diesel Piston Rod Stuffing Box Drain Oil 10 ...
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Page 217: ...MAN B W MAN Diesel Central Cooling Water System 11 ...
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Page 223: ...MAN B W MAN Diesel Seawater Cooling System 12 ...
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Page 235: ...MAN B W MAN Diesel Starting and Control Air 13 ...
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Page 243: ...MAN B W MAN Diesel Scavenge Air 14 ...
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Page 257: ...MAN B W MAN Diesel Exhaust Gas 15 ...
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Page 273: ...MAN B W MAN Diesel Engine Control System 16 ...
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Page 289: ...MAN B W MAN Diesel Vibration Aspects 17 ...
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Page 305: ...MAN B W MAN Diesel Monitoring Systems and Instrumentation 18 ...
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Page 329: ...MAN B W MAN Diesel Dispatch Pattern Testing Spares and Tools 19 ...
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Page 361: ...MAN B W MAN Diesel Project Suppport and Documentation 20 ...
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Page 371: ...MAN B W MAN Diesel Appendix A ...
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