Wärtsilä to supply LNG engine for world’s largest sailing ship

Oct 7, 2023

Finnish maritime manufacturer Wärtsilä has revealed the first vessels that will use its new 25DF dual-fuel LNG engine after it signed an order with French hospitality group Accor for its new Orient Express cruise brand. 

The engine will be used on two new sail-assisted cruise ships being built at the Chantiers de l’Atlantique shipyard, including the 220m-long Orient Express Silenseas, which is set to be the largest sailing ship in the world when it launches in 2026. 

Chantiers de l’Atlantique’s project manager Yann Penduff said: “These will be very special cruise vessels and have been designed to operate with a high level of environmental sustainability.  

“For this reason, the Wärtsilä 25DF engine was selected. It is silent, compact in size yet powerful in performance, so it was the perfect choice for these ships.” 

Accor’s order, which also features the option to equip two more vessels, includes four engines, four gas valve units and four NOx reducer emission after-treatment systems for each vessel, to be delivered from the end of 2024 during Europe’s autumn. 

The new 25DF engine is described by the manufacturer as the “most efficient” in its power range and features a two-stage turbocharging system, common rail fuel injection and cylinder-wise combustion control. 

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By GlobalData

Stefan Nysjö, vice-president of power supply for Wärtsilä Marine Power, said: “The Wärtsilä 25DF is an engine that supports the shipping industry’s transition to greater fuel efficiency and a much-reduced carbon footprint. 

“It marks the beginning of a new era of future-proof medium speed, small-bore engines and comes as an important step towards the maritime industry meeting its decarbonisation goals.” 

The order continues Wärtsilä’s success in signing agreements to supply its alternative fuel-powered engines to some of the maritime and cruise industry’s biggest players, including another French company, CMA CGM, which signed an order with the company for its six incoming 15,000 TEU methanol-powered container vessels.

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