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Wärtsilä launches new fuel-flexible medium-speed engine

Image: Wartsila Wärtsilä 46TS-DF.jpg
A new ‘easily retrofittable’ large-bore medium-speed engine, the Wärtsilä 46TS-DF, was officially launched by the Finnish technology group yesterday.

With two-stage turbocharging and high power density across a wide operational range, the new engine is suitable for vessels in a wide range of sectors, the company said. 

French cruise builder, Chantiers de L’Atlantique, has already placed an order for six of the new engines. The company placed a contract in April 2021 and the engines are to be installed on Royal Caribbean Cruises’ latest Oasis-class ship, Utopia of the Seas, due for delivery in spring 2024.  

The engine family is available in six to 16-cylinder configurations, with a power range from 7.8MW to 20.8MW at 600rpm. It is based on a modular design which simplifies upgradability and future modification for alternative fuels, the company said.

Stefan Nysjö, Vice President, Power Supply, Wärtsilä Marine Power, commented: “The maritime sector is having to adapt to the transitional effects caused by the need to meet decarbonisation goals within a relatively short period of time. This new engine launch provides an important boost towards achieving these goals. It delivers the power to change by setting a new benchmark for greater sustainability through high efficiency, emissions performance, and fuel flexibility.”

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