MAN Diesel
198 82 841.0
MAN Diesel 4.09
Page 2 of 3
6-9L27/38: 350 kW/cyl., 720 rpm, MGO
Reference Condition: Tropic
Air temperature
LT-water temperature inlet engine (from system)
Air pressure
Relative humidity
°C
°C
bar
%
45
38
1
50
Temperature basis
Setpoint HT cooling water engine outlet
1)
Setpoint LT cooling water engine outlet
2)
Setpoint Lube oil inlet engine
°C
°C
°C
79 nominal (Range of mechanical thermostatic element 77 to 85)
35 nominal (Range of mechanical thermostatic element 29 to 41)
66 nominal (Range of mechanical thermostatic element 63 to 72)
Number of Cylinders - 6 7 8 9
Engine output
Speed
kW
rpm
2,100 2,450 2,800 3,150
720
Heat to be dissipated
3)
Cooling water (C.W.) Cylinder
Charge air cooler; cooling water HT
Charge air cooler; cooling water LT
Lube oil (L.O.) cooler
Heat radiation engine
kW
kW
kW
kW
kW
315 368 421 473
668 784 903 1,022
175 200 224 247
282 329 376 423
70 81 93 104
Flow rates
4)
Internal (inside engine)
HT circuit (cylinder + charge air cooler HT stage)
LT circuit (lube oil + charge air cooler LT stage)
Lube oil
External (from engine to system)
HT water flow (at 40°C inlet)
LT water flow (at 38°C inlet)
m
3
/h
m
3
/h
m
3
/h
m
3
/h
m
3
/h
58 58 58 58
58 58 58 58
64 92 92 92
21.5 24.8 28.1 31.4
58 58 58 58
Air data
Temperature of charge air at charge air cooler outlet
Air flow rate
Charge air pressure
Air required to dissipate heat radiation (engine) (t
2
-t
1
= 10°C)
°C
m
3
/h
5)
kg/kWh
bar
m
3
/h
50 53 55 56
12,792 14,924 17,056 19,188
6.67 6.67 6.67 6.67
4.01
22,682 26,247 30,135 33,699
Exhaust gas data
6)
Volume flow (temperature turbocharger outlet)
Mass flow
Temperature at turbine outlet
Heat content (190°C)
Permissible exhaust back pressure
m
3
/h
7)
t/h
°C
kW
mbar
27,381 31,944 36,508 41,071
14.4 16.8 19.2 21.6
388 388 388 388
857 1,000 1,143 1,285
< 30
Pumps
a) Engine driven pumps
HT circuit cooling water (2.5 bar)
LT circuit cooling water (2.5 bar)
Lube oil (4.5 bar)
b) External pumps
8)
Diesel oil pump (5 bar at fuel oil inlet A1)
Fuel oil supply pump (4 bar discharge pressure)
Fuel oil circulating pump (8 bar at fuel oil inlet A1)
m
3
/h
m
3
/h
m
3
/h
m
3
/h
m
3
/h
m
3
/h
58 58 58 58
58 58 58 58
64 92 92 92
1.48 1.73 1.98 2.23
0.71 0.83 0.95 1.07
1.48 1.73 1.98 2.23
Starting air data
Air consumption per start, incl. air for jet assist (IR/TDI) Nm
3
2.9 3.3 3.8 4.3
1) LT cooling water flow first through LT stage charge air cooler, then
through lube oil cooler, water temperature outlet engine regulated by
mechanical thermostat.
2) HT cooling water flow first through HT stage charge air cooler, then
through water jacket and cylinder head, water temperature outlet en-
gine regulated by mechanical thermostat.
3) Tolerance: + 10% for rating coolers, - 15% for heat recovery.
4) Basic values for layout of the coolers.
5) Under above mentioned reference conditions.
6) Tolerance: quantity +/- 5%, temperature +/- 20°C.
7) Under below mentioned temperature at turbine outlet and pressure
according above mentioned reference conditions.
8) Tolerance of the pumps delivery capacities must be considered by the
manufactures.
Fig. 4.09.02a: List of capacities for L27/38, 720 rpm, IMO Tier II
MAN B&W 98-50MC/MC-C/ME/ME-C/ME-B/-GI-TII,
46-35ME-B/-GI-TII engines
L27/38-Tll GenSet Data