Fig. 4.07.02a: List of capacities for L21/31, 900 rpm
L21/31 GenSet Data
Cyl. 5 6 7 8 9
Maximum continuous rating at 900 rpm
kW 950 ,320 ,540 ,760 ,980
Engine-driven pumps:
LT cooling water pump (-2.5 bar) m³/h 55 55 55 55 55
HT cooling water pump (-2.5 bar) m³/h 55 55 55 55 55
Lubricating oil pump (3-5 bar) m³/h 3 3 4 4 4
External pumps:
Max. delivery pressure of cooling water pumps bar 2.5 2.5 2.5 2.5 2.5
Diesel oil pump (5 bar at fuel oil inlet A) m³/h 0.65 0.9 .06 .2 .36
Fuel oil supply pump (4 bar discharge pressure) m³/h 0.32 0.44 0.52 0.59 0.67
Fuel oil circulating pump (8 bar at fuel oil inlet A) m³/h 0.66 0.92 .07 .23 .38
Cooling capacities:
Lubricating oil kW 95 58 89 28 247
LT charge air kW 8 33 366 48 468
Total LT system kW 33 47 555 636 75
LT ow at 36°C inlet and 44°C outlet* m³/h 27.0 44.0 48. 5.9 54.0
Jacket cooling kW 54 274 326 376 427
HT charge air kW 20 337 383 429 475
Total HT system kW 355 6 709 805 902
HT ow at 44°C inlet and 80°C outlet* m³/h 8.5 9.8 22.6 25.3 27.9
Total from engine kW 668 082 264 44 67
LT ow from engine at 36°C inlet m³/h 27.0 43.5 47.6 5.3 53.5
LT outlet temperature from engine at 36°C inlet °C 55 58 59 6 63
( -string cooling water system )
Gas data:
Exhaust gas ow kg/h 6,679 9,600 ,200 2,800 4,400
Exhaust gas temperature at turbine outlet °C 335 348 348 348 348
Maximum allowable back pressure bar 0.025 0.025 0.025 0.025 0.025
Air consumption kg/h 6,489 9,330 0,900 2,400 4,000
Starting air system:
Air consumption per start incl. air for jet assist Nm³ .0 .2 .4 .6 .8
Heat radiation:
Engine kW 49 50 54 58
Alternator kW ( See separate data from alternator maker )
The stated heat balances are based on 00% load and tropical
condition.
The mass ows and exhaust gas temperature are based on ISO
ambient condition.
* The outlet temperature of the HT water is xed to 80°C, and
44°C for the LT water.
At different inlet temperature the ow will change accordingly.
Example: If the inlet temperature is 25°C then the LT ow will
change to (44-36)/(44-25)*00 = 42% of the original ow.
The HT ow will not change.
17856 53-3.0
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