Image credits: Wärtsilä
News Article

Wärtsilä Launches 25 Engine for Maritime Decarbonization Efforts

By Miriam Bello | Wed, 09/07/2022 - 13:48

Global leader in sustainable innovation Wärtsilä introduced its new Wärtsilä 25 medium-speed four-stroke engine. Based on the company´s highly successful modular technology platform, this latest addition to the company’s engine portfolio is designed to accelerate and support the maritime sector’s efforts in achieving decarbonized operations.

The Wärtsilä 25 engine’s modularity offers shipowners and operators maximized flexibility, while its efficiency and fuel economy deliver minimized emissions. The engine is capable of running on diesel, LNG or on either gas or liquid carbon-neutral biofuels. It can easily be upgraded to operate with future carbon-free fuels as they become available.

Flexible Power supply systems, as of today, are primarily based on reciprocating internal combustion engines, battery energy storage systems and reservoir hydroelectric plants, explains Raúl Carral, Business Development, Latin America North, Wärtsilä. The flexibility of having different valve timing options is a key enabler for future fuels and emissions optimization.

Wärtsilä 25 intends to be the first Wärtsilä engine to run on ammonia as a fuel. Technology development is currently underway with technology concept readiness programmed for 2023, followed by a planned product release shortly afterward. When operating with natural gas, the engine is IMO Tier III compliant, just as with diesel when integrated with a Wärtsilä NOx Reducer (NOR) emissions abatement system. Furthermore, it enables economically viable compliance with regulations such as the IMO’s CII and EEXI protocols planned for 2023.

“This engine marks the beginning of a new era of future-proof medium speed, small-bore engines and comes as an important step toward the maritime industry meeting its decarbonization goals. Wärtsilä 25 ticks all the boxes. It is a small but powerful engine and it provides an effortless transition to future fuels, making it a future-proof investment already today,” says Roger Holm, President Marine Power and Executive Vice President, Wärtsilä Corporation.

Wärtsilä 25 is designed for long periods of maintenance-free operation. It supports dry-docking schedules with a time-between-overhauls (TBO) of up to 32,000 hours, resulting on an increased cost-effective operation. It has a data-driven dynamic maintenance planning and its predictive maintenance services can extend the TBO even further.

The engine additionally features a robust and highly efficient turbocharging system with a high-pressure ratio. It is now available in 6L, 7L, 8L and 9L cylinder configurations, with a power output ranging from 1.9 to 3.1MW for the dual-fuel version and 2.0-3.4MW for the diesel version. Its common-rail high-pressure fuel injection technology optimizes combustion and fuel-injection settings at all loads, promoting a smoke-free operation.

Wärtsilä 25 has a self-learning proportional, integral, derivative (PID) control to reduce calibration needs and the gathering of critical engine data for predictive maintenance, reporting and analysis purposes via Wärtsilä’s Expert Insight service. The modules can be replaced on the fly, which eliminates the need for separate software downloads. It also has optional and easy-to-apply adjustments for arctic or tropical conditions and for reducing emissions to the level of a pure gas engine.

Photo by:   Wärtsilä
Miriam Bello Miriam Bello Senior Journalist and Industry Analyst