Port of South LouisianaSailors SocietyViganTBA GroupBühler GmbHPort of Stockton
  • Bühler GmbH
  • Telestack
  • Port of South Louisiana
  • Van Aalst
  • Sailors Society
  • TBA Group

Wärtsilä 25 engine paves way to maritime decarbonisation

Wärtsilä 25 engine paves way to maritime decarbonisation

(Posted on 09/09/22)

The technology group Wärtsilä has introduced its new Wärtsilä 25 medium-speed 4-stroke engine. Based on Wärtsilä’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 decarbonised operations.

The Wärtsilä 25 engine’s modularity offers shipowners and operators maximised flexibility, while the engine’s efficiency and fuel economy deliver minimised emissions. The engine is already capable of operating on diesel, LNG, or on either gas or liquid carbon-neutral biofuels, and can easily be upgraded to operate with future carbon-free fuels as they become available. The flexibility of having different valve timing options is a key enabler for future fuels and emissions optimisation. 

The Wärtsilä 25 is intended to be the first Wärtsilä engine to run on Ammonia as a fuel – technology development is currently underway with a technology concept readiness slated for 2023, followed by planned product release soon thereafter.

“This engine 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 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. Most importantly, the Wärtsilä 25 brings all of these advantages whilst keeping the total cost of ownership within reason.” says Roger Holm, President Marine Power & Executive Vice President Wärtsilä Corporation.

When operating with natural gas the engine is IMO Tier III compliant, as it also is 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 that enter into force in 2023.

The Wärtsilä 25 is designed for long periods of maintenance-free operation and it supports dry-docking schedules with a time-between-overhauls (TBO) of up to 32,000 hours. As a result, both downtime and operating costs are significantly reduced. Data-driven dynamic maintenance planning and predictive maintenance services can extend the TBO even further.

The Wärtsilä 25 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, while the dual-fuel (DF) version has a power output ranging from 1.9 to 3.1 MW, and the diesel version from 2.0 to 3.4 MW. The common-rail high pressure fuel injection technology optimises combustion and the fuel-injection settings at all loads. This in turn promotes smoke-free operation.

Other features include 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. Optional and easy-to-apply adjustments for arctic or tropical conditions and for reducing emissions to the level of a pure gas engine are also available.

Latest News

Siwertell ship loader order for high-capacity fertilizer handling

(Posted on 16/07/24)

Bruks Siwertell has secured an order for a Siwertell ship loader type-1A from Libyan Fertilizer Company... Read more


ECOsubsea invests in Singapore with NOK 35m from Innovation Norway

(Posted on 16/07/24)

It is a climate and environmental problem that ship hulls are not cleaned often and gently. After being... Read more


ECOsubsea invests in Singapore with NOK 35m from Innovation Norway

(Posted on 16/07/24)

It is a climate and environmental problem that ship hulls are not cleaned often and gently. After being... Read more


Berge Neblina sets sail with four carbon-saving rotor sails

(Posted on 12/07/24)

Berge Bulk has announced the successful installation of four emissions-reducing rotor sails on Berge... Read more


Wärtsilä simulators to support Singapore's Wavelink Maritime Institute

(Posted on 12/07/24)

Technology group Wärtsilä has supplied its new dual-fuel engine simulator technology for Wavelink... Read more


Oulu extends cargo handling with Konecranes Gottwald

(Posted on 04/07/24)

The Finnish Port of Oulu has ordered a Konecranes Gottwald ESP.7 Portal Harbor Crane to improve cargo... Read more


Intergis adds flexibility in South Korea with Konecranes Gottwald Gen 6 MHC

(Posted on 28/06/24)

Intergis Co., Ltd ordered a Konecranes Gottwald ESP.5 Mobile Harbour Crane to improve its bulk and general... Read more


Live freight rate visibility across routes and maturities

(Posted on 28/06/24)

AXSMarine, a pioneer and market leader in the provision of advanced solutions and market intelligence... Read more


Weathernews enhances SeaNavigator platform with powerful new tools

(Posted on 19/06/24)

In line with its focus on continuous improvement of its cloud-based SeaNavigator voyage-optimization... Read more


BOA: Ships should be built to seawater-lubricated sterntubeless design

(Posted on 14/06/24)

Future newbuild ships of all types should be built without a sterntube and with a seawater-lubricated... Read more


Geneva DryVan AalstTMS Awards 2023TelestackCimbria
  • Port of Stockton
  • Cimbria
  • Geneva Dry

Subscribe to our newsletter

Keep up to date with the latest global news in bulk cargo handling and shipping