Wärtsilä’s world-first derating solution for two-stroke engines
(Posted on 31/03/23)
Technology group Wärtsilä has introduced a new radical derating retrofit solution – Wärtsilä Fit4Power - to extend the emissions-compliant lifetime of merchant vessels by providing the existing two-stroke fleet with leaner, healthier and more optimised engines.
This new advanced retrofit solution enables ship owners to reduce the bore size of two-stroke engines by 25% while significantly improving combustion efficiency, which in turn reduces both fuel consumption and greenhouse gas emissions. For owners, this will improve the efficiency of their existing fleet, ensuring compliance with Carbon Intensity Indicator (CII) regulations, and futureproofing assets against future environmental measures.
Wärtsilä 2-Stroke Services successfully completed the pilot installation of Wärtsilä Fit4Power onboard a ship with large-bore two-stroke main engine last year. The results proved that a vessel with this kind of main engine, that is now oversized for today’s operating patterns, can save 2,000 tonnes of fuel and reduce at least 6,000 tonnes of CO2 emissions annually thanks to this retrofit solution. Fit4Power received certificate of product design assessment from American Bureau of Shipping (ABS) in 2022.
Ole Pyndt Hansen, Managing Director at Wärtsilä 2-Stroke Services, said: “With the IMO’s CII now in force, operators of merchant vessels need cost-effective solutions that can assure the long-term fitness of their existing fleet. Radical derating gives mid-life engines a new lease of life, with a power output and emissions profile that can take them through the early years of CII and prepare them for the most efficient use of new fuels needed to reach later emissions targets.”
While conventional derating merely tunes engines for operation at lower loads, Wärtsilä Fit4Power involves reducing the bore diameter of engine cylinders and introducing a new combustion chamber design, enabling the engine to run at optimal loads and with state-of-the-art fuel efficiency. The higher compression ratios and firing pressure achieved mean that the modified engine offers far greater efficiency than either conventionally derated engines or unmodified engines run at much lower loads.
Analysis from Wärtsilä shows that without modification, more than 80% of the global merchant fleet could fall into the lowest CII rating by 2030, requiring mandatory corrective action and risking losing business to more efficient vessels. Improving engine efficiency and optimisation with solutions such as Fit4Power is one of the simplest and most cost-effective means of reducing emissions.
The solution is also a step towards the economical use of alternative fuels to meet future emissions reduction targets. It is designed to be compatible with Wärtsilä Fit4Fuels (Wärtsilä’s Two-Stroke Future Fuels Conversion Platform), a cost-effective retrofit solution enabling vessels to use LNG, methanol and ammonia fuels. By improving efficiency in line with CII requirements ahead of this next step, radical derating extends the CII compliant lifetime of the vessel by three to five years, giving shipowners valuable breathing space ahead of making a commitment to a future fuel – potentially more if owners opt for low or zero-carbon drop-in biofuels.
By substantially renovating mid-life engines, radical derating also benefits operators by both reducing ongoing maintenance costs, lubricating costs and extending the lifecycle of the main engine. Radical derating is currently available only for RT-flex96C engines.
Latest News
Bruks Siwertell Group announces leadership transition
(Posted on 31/03/25)Bruks Siwertell Group has announced a leadership transition as Peter Jonsson steps down as CEO after... Read more
ClassNK issues AiP for OceanWings Rigid Windsail Type WAPS
(Posted on 31/03/25)ClassNK has issued an approval in principle (AiP) for a Rigid Windsail Type Wind-Assisted Propulsion... Read more
Seafarers welcome Elcome’s new pay-as-you-go high speed internet service
(Posted on 27/03/25)Elcome International’s new high-speed internet service, WELCOME, is revolutionising the way ship... Read more
Kaiko funding to enhance resilience in maritime operations with AI
(Posted on 27/03/25)Kaiko Systems, a leader in AI-driven frontline intelligence for the maritime industry, today announced... Read more
Liebherr manufactures 2,000th LHM
(Posted on 19/03/25)Marcegaglia’s latest acquisition, the LHM 600, marks a significant milestone as the 2,000th mobile... Read more
IOMSR plays key role in pioneering maritime wind power project
(Posted on 18/03/25)The Isle of Man Ship Registry (IOMSR) is playing a key role in the development of a high-tech sail aimed... Read more
AtoB@C Shipping at halfway in newbuilding programme
(Posted on 18/03/25)AtoB@C Shipping, subsidiary of ESL Shipping, has taken delivery of Terramar in Goa, India on 14 March... Read more
Strong VIKING on track towards new goals
(Posted on 18/03/25)As a new strategy period commences, VIKING Life-Saving Equipment A/S has achieved strong financial results... Read more
Baltic Exchange introduces biofuel blends in expansion of Emissions Calculator
(Posted on 12/03/25)Baltic Exchange has introduced a series of green fuel options to its FuelEU voyage and compliance cost... Read more
Veson Nautical and Cargill expand long-standing partnership
(Posted on 06/03/25)Veson Nautical, a global leader in maritime data and freight management solutions, and Cargill have... Read more
