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Latest dual-fuel engine from Wärtsilä

LNG Industry,

Wärtsilä has introduced the new 46DF engine, emphasising the company’s leading position in dual-fuel engine technology.

The dual-fuel Wärtsilä 46DF engine has been specifically developed for the high-output market segment, including cruise ships and ferries, merchant vessels, LNG carriers and FSRUs (floating storage and regasification units), and offshore vessels and platforms.

Fuel flexibility

The engine is capable of operating on natural gas, heavy fuel oil, or marine diesel oil. This fuel flexibility enables reduced operational expenses, compliance with the most stringent emission standards, and full redundancy to ensure uninterrupted operation.

"With this newly launched product, Wärtsilä has raised the industry standard even higher, since it offers simultaneously drastically lower specific fuel consumption, both in gas and diesel fuel mode, remarkably higher output, and extremely attractive lifecycle costs compared to any other alternative currently available on the market," explained Lars Anderson, VP 4-stroke sales at Wärtsilä Ship Power.

Lower fuel consumption

The Wärtsilä 46DF consists of two different versions to meet specific customer needs. The high efficiency version offers considerably lower fuel consumption with a cylinder power of 1045 KW, while the high power version is capable of a cylinder power of 1145 KW with excellent engine thermal efficiency.

For LNG carrier applications, the Wärtsilä 46DF can offer fuel savings of as much as 20 tpd compared to the first introduced DF engines. With up to 14 fewer cylinders installed, the overall lifecycle installation costs are significantly reduced by approximately US$ 1000 per day.

Emission regulations

When operating in gas mode, the Wärtsilä 46DF engine is already compliant with IMO Tier III regulations without any secondary exhaust gas purification systems. Sulphur oxide (SOx) and carbon dioxide (CO2) emissions are also notably reduced when operating on gas. In liquid fuel oil mode, the Wärtsilä dual-fuel engines are fully compliant with IMO Tier II exhaust emission regulations.

Adapted from press release by Katie Woodward

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