Figure 7: Reduction of the specific fuel consumption SFOC of MC/MC-C/ME-B
engines by means of VTA
For a specific L
1
engine, the SFOC profile can be taken directly from the
tables above. For example, an S70ME-C8.2 at a load of 65% and with an L
1
SFOC of 169 g/kWh, optimized for partial load with VTA tuning, has a con-
sumption of 169 - 6.5 g/kWh = 162.5 g/kWh.
The tuning methods specified above are also available for derated engines
with various SMCRs. The load-dependent standard SFOC profile is different
for a derated engine; the difference specified above between the individual
tuning methods and the standard engine is the same, however.
For engines with turbochargers featuring conventional efficiency, optimization
is only possible at high load.
The specified methods and options are explained below.
2013-12-04 - de
1 Adjustable turbine nozzle ring (VTA)
1.3 Low-speed propulsion engines from MAN B&W
MAN Diesel & Turbo
1
EN-US
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