Figure 6: Reduction of the specific fuel consumption SFOC of ME/ME-C engines by
means of VTA
SFOC-optimized load range
Tuning method
SFOC change [g/kWh]
35%
50%
65%
80%
100%
High load (85-100%)
Standard L
1
engine
4
0
-2.5
-3
0
Partial load (50-85%)
VTA
2
-2
-4.5
-4
2
Low load (25-70%)
VTA
1
-3
-5.5
-3
1
Standard L
1
engine – turbocharger without adjustable turbine nozzle ring
VTA – turbocharger with adjustable turbine nozzle ring
Table 9: Optimization potential – MC/MC-C/ME-B Tier II engines, SMCR = L
1
1 Adjustable turbine nozzle ring (VTA)
1.3 Low-speed propulsion engines from MAN B&W
2013-12-04 - de
1
MAN Diesel & Turbo
12 (38)
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