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MAN B&W 6.04
Page 10 of 12
∆M amb% = � 0.41 x (T air � 25) + 0.03 x (p bar � 1000) + 0.19 x (T CW � 25 ) � 0.011 x (∆p M � 300) % [7]
∆T amb = 1.6 x (T air � 25) � 0.01 x (p bar � 1000) +0.1 x (T CW � 25) + 0.05 x (∆p M � 300) °C [8]
where the following nomenclature <strong>is</strong> used:
∆M amb% : change in exhaust gas amount, in % of amount at ISO conditions
∆T amb
: change in exhaust gas temperature, in °C compared with temperatures at ISO conditions
Fig. 6.04.10: Exhaust gas correction formula for ambient conditions and exhaust gas back pressure
mS% %
16
14
12
10
8
6
4
2
0
-2
-4
50 60 70 80 90 100 110 P S%
Engine load, % specified MCR power
P S% = (P S /P M ) x 100%
∆m S% = 37 x (P S /P M ) 3 � 83 x (P S /P M ) 2 + 31 x (P S /P M ) + 15
Fig. 6.04.11: Change of specific exhaust gas amount,
∆m s% in % at part load, and valid for FPP and CPP
c) Correction for engine load
Figs. 6.04.11 and 6.04.12 may be used, as
guidance, to determine the relative changes
in the specific exhaust gas data when running
at part load, compared to the values in the
specified MCR point, i.e. using as input P S% =
(P S /P M ) x 100%:
M
50 60 70 80 90 100 110 P S%
Engine load, % specified MCR power
MAN B&W MC/MC�C, ME/ME-B/ME�C/ME�GI engines 198 43 20�3.3
MAN Diesel
20
15
10
T S
5
0
-5
-10
-15
178 24 62�3.0 178 24 63�5.0
P S% = (P S /P M ) x 100%
∆T S = 262 x (P S /P M ) 2 � 413 x (P S /P M ) + 151
Fig. 6.04.12: Change of exhaust gas temperature,
∆T S in °C at part load, and valid for FPP and CPP
∆m s% : change in specific exhaust gas amount,
in % of specific amount at specified MCR
point, see Fig. 6.04.11.
∆T s
: change in exhaust gas temperature, in °C,
see Fig. 6.04.12.
M