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Wärtsilä Gas Compression Engines

Posted on April 4, 2008

Wärtsilä Corporation is introducing its 34SG gas engines to the gas compressor market. The gas engines have an output range of 4050 to 9000 kW and are said to offer considerable lifecycle cost improvement for compressor owners and operators. Typical applications for the engines will be gas pipelines and gas storage facilities. The new compressor-drive engines are supported through Wärtsilä's worldwide network of trained field support and spare parts resources. The company will also provide long-term service and support agreements that are tuned to meet the specific needs of customers.

The 34SG engines will be available in three variants: the nine-cylinder, in-line Wärtsilä 9L34SG with 4050 kW shaft power; the 16-cylinder Wärtsilä 16V34SG engine of rated 7200 kW; and the 20-cylinder Wärtsilä 20V34SG with 9000 kW shaft power. Ratings are recorded at a nominal speed of 750 r/min. The engines have a full-load efficiency of 46.3 percent (heat rate 5493 BTU/hph), a 30 percent speed turndown ratio (to 525 r/min) and a 70 percent torque turndown ratio. Furthermore, both engine efficiency and exhaust emissions remain virtually unchanged across the whole load range. The engine has low exhaust emissions. NOX emissions remain below the 500 mg/Nm3 dry at 5% O2 level throughout the entire speed and torque range.

The engines have a fully electronic engine control system for all the principal engine functions such as gas feed, charge air flow, fuel gas flow control, individual cylinders, and ignition control. Through complete control of these critical engine functions, engine performance can be optimized over the whole operating field.

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