Connect with us

Retrofit

LR study: Demand for propeller retrofits surge four-fold but adoption remains limited

New research by Lloyd’s Register shows while propulsion energy saving devices could deliver up to 10% fuel reduction, only 1.74% of the global fleet is currently equipped with rudder bulbs.

Admin

Published

on

RESIZED william william on Unsplash

Demand for advanced propeller retrofits and energy saving devices (ESDs) has nearly quadrupled since 2020 as shipping owners and operators look to enhance energy efficiency to meet tightening emissions regulations. 

However, according to The Energy Saving Devices Retrofit Report from Lloyd’s Register (LR), while high-efficiency propellers can deliver fuel savings of between 3-10%, and popular devices such as rudder bulbs can achieve 3.5% reductions, only 1.74% of the global fleet currently features the rudder bulb, the most popular device, from newbuild.  

The orderbook tells a different story, with 8.42% of vessels on order choosing to install ESDs. The proportion of vessels on the orderbook fitted with a particular device is between two and six times higher than for those vessels already in service. 

The report identified bulk carriers, tankers and container ships as prime candidates for retrofitting, with these vessel segments showing the highest adoption rates due to their substantial fuel consumption profiles. Notably, 16.87% of bulk carriers on order will feature rudder bulbs compared to just 6.74% of the existing fleet. In the container ship segment, rudder bulbs, stator fins, and boss cap fins are each present on at least 10% of vessels (existing fleet and orderbook). 

In total, more than 10,000 vessels in the existing fleet and orderbook feature some form of propulsion energy-saving technology from newbuild. Added to this are at least a further 1,400 vessels that have had ESDs retrofitted since 2020. The number of installations on existing vessels is growing, showing nearly four-fold growth since 2020, with close to 1,500 vessels contracted to be fitted with devices by the end of 2024. 

The report also reveals a trend towards retrofitting newer vessels, with more than one-third of 2024 retrofits performed on ships less than ten years old, compared to just 16% in 2020. By 2024, 12% of retrofits were performed on vessels built less than six years ago, a category that saw no retrofits in 2020. 

Regulatory pressure is identified as the primary catalyst driving this surge in retrofits. The IMO’s Carbon Intensity Indicator (CII) and GHG strategy, combined with European regulations including the EU Emissions Trading System and FuelEU Maritime, directly link vessel performance to financial penalties. LR’s analysis projects that a 20% fuel consumption reduction could save an Aframax tanker operator nearly US$3 million over ten years through reduced exposure to European regulations alone.  

Despite the benefits, the research highlights challenges in retrofit selection and implementation. Many operators struggle with technology selection due to potential interactions between different devices, unverified performance claims, and incomplete understanding of vessel-specific requirements. The report notes that some highly promising technologies fail during full-scale validation despite excellent model test results. 

Biofouling is also identified as a threat to retrofit performance, with marine growth on propeller blades and ESDs potentially negating efficiency gains through increased surface roughness and altered hydrodynamic profiles.  

To address these challenges, LR recommends a five-step approach encompassing comprehensive vessel assessment, hydrodynamic analysis using computational fluid dynamics, careful consideration of technical factors including torsional vibration and underwater radiated noise, robust performance monitoring, and long-term maintenance planning. 

Claudene Sharp-Patel, Global Technical Director at Lloyd’s Register, said: “Our research reveals that propeller and ESD retrofits offer ship operators a proven pathway to significant fuel savings, extended regulatory compliance, and meaningful emissions reductions. 

“However, successful propeller and ESD retrofits require far more than simply bolting on additional equipment. They demand sophisticated analysis, careful integration with existing systems, and ongoing performance management. Our role extends throughout the entire retrofit journey, from initial assessment through long-term optimisation.”

The Energy Saving Devices Retrofit Report forms part of LR’s Retrofit Research Programme, which combines with LR’s Fuel for Thought series to provide industry-leading insights into adapting existing vessels for cleaner and greener shipping. 

Note: The Energy Saving Devices Retrofit Report can be viewed here

 

Photo credit: william william on Unsplash
Published: 5 June, 2025

Continue Reading

LNG Bunkering

EXMAR to convert LNG carrier into floating transshipment unit for bunkering

Vessel will soon undergo a dry-dock including modifications to make the vessel suitable as a floating transshipment unit, dedicated to the LNG bunkering market.

Admin

Published

on

By

EXMAR to convert LNG carrier into floating transshipment unit for bunkering

Ship owner EXMAR on Thursday (6 August) announced that it has taken delivery of the 146,000 m³ LNG Carrier SIMAISMA

The vessel is secured under an initial seven-year charter contract with a “first-class counterpart”. 

“The vessel will soon undergo a dry-dock including modifications to make the vessel suitable as a floating transshipment unit (FTU), dedicated to the LNG bunkering market,” it said in a statement. 

The FTU will receive large parcels of LNG from trading LNG carriers and specialised LNG bunkering vessels will load at the FTU before supplying it as a fuel to vessels that use this LNG as a bunker fuel.

EXMAR’s CEO, Carl-Antoine Saverys, said: “EXMAR is gladly assisting its client in further paving the way to unlock LNG as a fuel for the shipping industry. 

“The FTU is a smart solution with which our client brings down the costs of the logistics relating to the LNG bunkering. 

“With this solution, we are building upon EXMAR’s close to 50 years of LNG experience. We look forward to deploying more of these assets to unlock the full potential of LNG as a fuel for the maritime industry.”

 

Photo credit: EXMAR
Published: 7 August, 2026

Continue Reading

Alternative Fuels

EC clears EUR 103 mil Dutch funding for renewable methanol and hydrogen-powered ships

Scheme will support purchase of vessels powered by renewable methanol or renewable hydrogen and retrofitting of existing vessels to enable them to use renewable methanol and renewable hydrogen.

Admin

Published

on

By

Guillaume Périgois on Unsplash

The European Commission recently said it has approved a EUR 103 million (USD 119 million) State aid scheme by the Netherlands to accelerate the greening of the Dutch maritime fleet. 

The scheme will support the purchase of new clean and zero-emission vessels powered by renewable methanol or renewable hydrogen and the retrofitting of existing vessels to enable them to use renewable methanol and renewable hydrogen. 

It covers different types of vessels, including passenger, cargo and work vessels, mainly operating in the short-sea shipping segment. The support will take the form of direct grants awarded under an open, transparent and non-discriminatory selection process.

The scheme aims to help companies overcome high upfront investment costs and limited market incentives that currently slow the uptake of clean shipping technologies. The aid will be granted between 2027 and 2031 and will help bridge the investment gap in line with the objectives of EU legislation such as the FuelEU Maritime and the EU Emission Trading System.

The Commission assessed the measure under EU State aid rules, in particular Article 107(3)(c) of the Treaty on the Functioning of the EU and the 2022 Climate, Environmental Protection and Energy Aid Guidelines (CEEAG). 

“The Commission concluded that the scheme is necessary and appropriate as the supported investments would not take place without public support at the same scale and within the same timeframe. The measure is also proportionate as it has limited effects on competition and trade in the internal market,” it said. 

 

Photo credit: Guillaume Périgois on Unsplash
Published: 3 August, 2026

Continue Reading

Retrofit

DNV on key lessons learned from a 20,000 TEU methanol retrofit delivered by global partners

DNV demonstrated how complex methanol retrofits can be carried out in practice through a project involving COSCO Shipping, CHI Shanghai, MARIC, suppliers, and DNV.

Admin

Published

on

By

DNV on key lessons learned from 20,000 TEU methanol retrofit

Classification society DNV recently highlighted how complex methanol retrofits can be carried out in practice through a project involving COSCO Shipping, CHI Shanghai, MARIC, suppliers, and DNV. 

Its latest Maritime Impact article detailed challenges in design integration, construction, commissioning, and operations, while demonstrating how close collaboration and early planning support more efficient delivery and knowledge transfer: 

The world’s first methanol conversion project for a mega container carrier was completed at CHI‑Shanghai’s yard in September 2025. At nearly 400 metres in length and with a capacity of 20,000 TEU, the seven‑year‑old vessel became the first ship of its kind to be retrofitted to run on methanol. 

Delivered through close coordination between COSCO Shipping, CHI Shanghai, designers, suppliers, and DNV, and supported by a process of continuous learning, the project demonstrated that deep, first‑of‑a‑kind retrofits can be executed safely, on time, and at industrial scale.

Designing a methanol conversion for a megaship

The vessel’s fuel system, designed only for conventional fuels, required fundamental changes to enable safe and compliant methanol operation across propulsion, auxiliaries, storage, and safety systems.

The general design was developed by MARIC, while CHI Shanghai carried out the detailed engineering and served as EPC contractor. The scope included conversion of the ship’s MAN B&W 11S90 main engine and two of its four Wärtsilä auxiliary engines to dual‑fuel operation. In parallel, new methanol fuel tanks with a total capacity exceeding 15,000 cubic metres were installed forward of the engine room, together with new fuel preparation and supply systems.

Coordinating the complexity of retrofitting

Delivering this as a retrofit rather than a newbuild added complexity that is often underestimated. Existing structural arrangements could not simply be replaced, and new systems had to be integrated into confined spaces, requiring innovative construction sequences and tight interface management between suppliers. 

“This was a very complex project involving many parties, including engine makers, fuel system suppliers, and automation and safety specialists,” says Yan Hao, Commercial Director at CHI‑Shanghai. “It was also the first time all of these suppliers had worked together on a methanol retrofit of this scale. Coordination was critical.”

Note: The full article by DNV can be read here.

 

Photo credit: DNV and COSCO Shipping
Published: 15 June, 2026

Continue Reading
Advertisement

OUR INDUSTRY PARTNERS



Trending