This section is available on request - MAN Diesel & Turbo

MAN B&W 2.07
SFOC for High Efficiency/Conventional Turbochargers
All engine types are as standard fitted with high
efficiency turbochargers (EoD: 4 59 04) but can
alternatively use conventional turbochargers, option:
4 59 07.
The high efficiency turbocharger <strong>is</strong> applied to the
engine in the basic design with the view to obtaining
the lowest possible Specific Fuel Oil Consumption
(SFOC) values, see curve A, Fig. 2.07.0 .
With a conventional turbocharger the amount of
air required for combustion purposes can, however,
be adjusted to provide a higher exhaust gas
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temperature, if th<strong>is</strong> <strong>is</strong> needed for the exhaust gas
boiler.
The matching of the engine and the turbocharging
system <strong>is</strong> then modified, thus increasing the exhaust
gas temperature by 20 °C.
<strong>Th<strong>is</strong></strong> modification will lead to a 7�8% reduction in
the exhaust gas amount, and involve an SFOC
penalty of 2 g/kWh, see curve B, Fig. 2.07.0 .
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Fig. 2.07.01: Example of part load SFOC curves for high efficiency and conventional turbochargers
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198 96 82�4.8
198 38 45�8.7