Wärtsilä launches new large bore dual-fuel engine

The medium-speed engine is designed with a focus on efficiency, environmental performance, and fuel flexibility. In gas fuel mode, the engine has the highest efficiency thus far achieved in the medium-speed engine market.

The first order for this engine was placed by Chantiers de l’Atlantique for Royal Caribbean Cruises in April 2021. The engines will be installed on their latest Oasis class ship Utopia of the Seas. The ship is being built by Chantiers de l’Atlantique and will feature six Wärtsilä 46TS-DF engines with gas valve units, NOx reducer SCR systems, LNGPac and transverse thrusters.

The engine is designed to be a future-proof solution for owners and operators to reach decarbonisation targets. The Wärtsilä 46TS-DF has a two-stage turbocharging to deliver high levels of efficiency and power density across a wide operational range for vessels in all segments of the industry. This level of efficiency reduces fuel consumption and lowers emissions, while being easily retrofittable for future carbon-neutral and carbon-free fuels as they become widely available.

Development of the Wärtsilä 46TS-DF engine has been based on the extensive experience gained from the company’s Wärtsilä 46, 46F, and 50 engine families. It is available in 6- to 16-cylinder configurations, corresponding to a power output range of 7.8 to 20.8 MW at 600rpm. It features an intrinsically modular design, which simplifies upgradability and modifications for alternative future fuels. By running on LNG, it also offers a viable platform for further decarbonisation through the use of bio- or synthetic methane in the future.

Main particulars – Wärtsilä 46TS-DF engine