The most efficient gas engine, Wärtsilä 31SG, is a four-stroke, spark-ignited, lean-burn gas engine generating set. With its world class open-cycle efficiency and unparalleled dynamic capabilities, it reduces environmental footprint and lowers the total cost of ownership.
Wärtsilä 31SG is well suited for baseload production, balancing renewables and industrial applications where reducing carbon emissions while producing reliable power is crucial. Its capability of fast starting and stopping and ability to run on sustainable fuels secures low emissions and high efficiency. It also meets the specific needs of combined heat and power (CHP) plants, for example steam generation, hot or chilled water or a combination of the above. Wärtsilä engine power plants can be delivered both as EPC and Equipment Delivery contracts.
Wärtsilä’s state-of-the-art gas engine technology will provide flexibility and black start capability to DREWAG, the local utility company in Dresden, Germany. The combined heat and power (CHP) engine power plant will produce electricity and district heating simultaneously. Upon completion, it will be the only power plant that can restart the Dresden grid in case of a power blackout.
Power to grid
|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)|
|WÄRTSILÄ 31SG||WÄRTSILÄ 31SG Efficiency optimised|
|Rated electrical power (kW)||11 777 (50 Hz) 11 377 (60 Hz)||10 798 (50 Hz) 10 396 (60 Hz)|
|Electrical efficiency (%)||51.5 (50 Hz) 51.6 (60 Hz)||52.2 (50 Hz) 52.3 (60 Hz)|
|Heat rate kJ/kWh||6 986 (50 Hz) 6 971 (60 Hz)||6 901 (50 Hz) 6 886 (60 H)|
|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%|
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)
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