
The most efficient Wärtsilä 31DF, is a four-stroke multi-fuel engine generating set.
The record-breaking efficiency and fuel adaptability of Wärtsilä 31DF has been designed for applications where energy security is significantly important and where gas network is still forthcoming. Its modular design ensures easy adaption for the engine to run on renewable fuels. Wärtsilä engine power plants can be delivered both as EPC and Equipment Delivery contracts.
to full load
Electrical efficiency
million running hours with Wärtsilä dual fuel technology
Engine generating set | ||
Cylinder configurations | 20 V | |
Cylinder bore | 310 mm | |
Piston stroke | 430 mm | |
Engine speed | 750 rpm (50 Hz), 720 rpm (60 Hz) | |
Performance * | ||
WÄRTSILÄ 31DF, GAS | WÄRTSILÄ 31DF, LFO | |
Rated electrical power (kW) | 10 777 (50 Hz) 11 377 (60 Hz) | 10 777 (50 Hz) 11 377 (60 Hz) |
Electrical efficiency (%) | 50.2 (50 Hz) 50.2 (60 Hz | 47.9 (50 Hz) 47.9 (60 Hz) |
Heat rate (kJ/kWh) | 7 170 (50 Hz) 7 175 (60 Hz | 7 510 (50 Hz) 7 515 (60 Hz |
Loading and unloading | ||
Connected to grid | Full load | |
Regular start time (min:sec) | 00:30 | < 5 |
Fast start time (min:sec) | 00:30 | < 2 |
Stop time (min) | < 2 | |
Ramp rate (hot, load/min) | > 100% | |
Minimun Load | ||
Unit level | 20% | |
Plant level | 1% |
* Rated electrical power and electrical efficiencies are given at generator terminals at 100kPa ambient pressure, 25°C suction air temperature and 30% relative humidity, and without engine driven pumps. Power factor 1.0 (site). Electrical efficiency with 5% tolerance. Site conditions, fuel and applicable emission limits may have an impact on performance figures. Please contact Wärtsilä for project-specific performance data. Catalyst systems are designed based on project specific requirements. Certain fuel components are poisonous for catalyst elements. Maximum amount of these components to be limited in the fuel in applications where catalyst system is installed. |
Disclaimer: The information contained herein is provided for informational purposes only and may not be incorporated, in whole or in part, into any agreement or proposal. No representation of any kind is made in respect of any information contained herein and Wärtsilä expressly disclaims any responsibility for, and does not guarantee, the correctness or the completeness of the information. The calculations and assumptions included in the information do not necessarily take into account all the factors that could be relevant in a particular case. Information herein shall not be construed as a guarantee or warranty of the performance of any Wärtsilä technology, equipment or installation. |
1MWh
1MW
100MW
200MW
300MW
400MW
> 500MW
Liquid fuels
Natural gas
Liquid fuels and gas
Flexible baseload (>6000 running hours annually)
Intermediate load (2000 - 6000 running hours annually)
Peaking and grid stability (<2000 running hours annually)
Emergency
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