Wartsila ?31DF Series, Product Manual, Page: 27 / 216

3.2 Wärtsilä 8V31DF
ME AUX AUX DE DE
Wärtsilä 8V31DF
Diesel
mode
Gas
mode
Diesel
mode
Gas
mode
Diesel
mode
Gas
mode
Diesel
mode
Gas
mode
Diesel
mode
Gas
mode
750 750 720 750 720 rpm Engine speed
550 550 530 550 530 kW Cylinder output
Variable Constant Constant Constant Constant Speed mode
4400 4400 4240 4400 4240 kW Engine output
2.71 2.71 2.72 2.71 2.72 MPa Mean effective pressure
Tier 2 Tier 3 Tier 2 Tier 3 Tier 2 Tier 3 Tier 2 Tier 3 Tier 2 Tier 3 IMO compliance
Combustion air system (Note 1)
8.4 6.6 8.4 6.6 8.1 6.4 8.4 6.6 8.1 6.4 kg/s Flow at 100% load
45 45 45 45 45 °C Temperature at turbocharger in-
take, max.
60 60 60 60 60 60 60 60 60 60 °C Temperature after air cooler (TE
601)
Exhaust gas system (Note 2)
8.7 7.4 8.7 7.4 8.1 7.1 8.7 7.4 8.1 7.1 kg/s Flow at 100% load
7.4 6.1 7.4 6.1 6.9 5.9 7.4 6.1 6.9 5.9 kg/s Flow at 85% load
6.6 5.5 6.9 5.4 6.4 5.2 6.9 5.4 6.4 5.2 kg/s Flow at 75% load
5.0 3.8 4.9 3.8 4.6 3.7 4.9 3.8 4.6 3.7 kg/s Flow at 50% load
270 300 270 300 270 300 270 300 270 300 °C Temperature after turbocharger
at 100% load (TE 517)
260 320 270 350 270 350 270 350 270 350 °C Temperature after turbocharger
at 85% load (TE 517)
270 310 260 350 260 350 260 350 260 350 °C Temperature after turbocharger
at 75% load (TE 517)
270 330 280 370 280 370 280 370 280 370 °C Temperature after turbocharger
at 50% load (TE 517)
7 7 7 7 7 kPa Backpressure, max.
697 657 697 657 671 647 697 657 671 647 mm Calculated exhaust diameter for
35 m/s
Heat balance at 100% load (Note 3)
424 360 424 360 408 344 424 360 408 344 kW Jacket water, HT-circuit
768 504 768 504 680 472 768 504 680 472 kW Charge air, HT-circuit
1296 1064 1304 1072 1208 1024 1304 1072 1208 1024 kW Charge air, LT-circuit
488 408 488 408 472 392 488 408 472 392 kW Lubricating oil, LT-circuit
120 120 120 120 120 120 120 120 120 120 kW Radiation
Fuel consumption (Note 4)
(Note 5)
- 7280 - 7280 - 7250 - 7280 - 7250 kJ/kWh Total energy consumption at
100% load
- 7230 - 7350 - 7300 - 7350 - 7300 kJ/kWh Total energy consumption at 85%
load
- 7250 - 7500 - 7430 - 7500 - 7430 kJ/kWh Total energy consumption at 75%
load
- 7330 - 7820 - 7790 - 7820 - 7790 kJ/kWh Total energy consumption at 50%
load
- 7128 - 7128 - 7097 - 7128 - 7097 kJ/kWh Fuel gas consumption at 100%
load
DBAE248994 3-3
3. Technical Data Wärtsilä 31DF Product Guide