Hanwha and Accelleron have conducted an Engine Part Load Optimization (EPLO) for Höegh Autoliners to enhance long-term energy efficiency on its 7,850 CEU (Car Equivalent Units) car carrier, Höegh Detroit. The project’s success in improving the vessel’s Carbon Intensity Indicator (CII) rating has resulted in additional EPLO orders for seven more vessels owned or operated by Höegh.
During a recent sea trial, EPLO demonstrated fuel savings of 10g/kWh, equivalent to 5% of total fuel consumption. This improvement not only allows the vessel to achieve a high CII rating but also significantly reduces operating costs, including fuel and EU ETS expenses, while cutting down CO2 emissions.
Working with engine builder Hanwha Engine Co., Accelleron optimized both engine tuning and turbocharger configuration, incorporating components better suited for the vessel’s lower speed profile. Turbocharger nozzle rings, turbine blades, and compressor wheels were adapted, along with various engine parameters, to optimize efficiency for a de-rated engine output at 79% of the original maximum continuous rating, specifically tailored to the new propulsion upgrade. As part of the project, Höegh Detroit was equipped with a new propeller enabling it to maintain the same maximum speed as before the modifications, with the sole difference being reduced fuel consumption.
Sebjørn Dahl, Chief Operations Officer at Höegh Autoliners, said “Operating at reduced engine power is one of several energy efficiency measures Höegh Autoliners is implementing as part of our commitment to lead sustainable deep-sea shipping. The fuel efficiency improvements from EPLO on Höegh Detroit exceeded our expectations, ensuring long-term energy efficiency and market value for the vessel. We are confident in replicating this success in future EPLO projects.”
“Sustainability and emission reduction are central to Höegh Autoliners’ strategy. This collaboration with Accelleron and Hanwha has yielded excellent results, demonstrating effective decarbonization in practice.”
With over 60% of the world’s ships over 400 gross tons (GT) required to comply with IMO’s CII regulations, the criteria for energy intensity are increasingly stringent, driving decarbonization efforts in the maritime industry. Consequently, many shipping companies are exploring and implementing various measures to enhance the efficiency of their existing fleets to remain competitive in a challenging market.
Operating at reduced speeds is a common strategy that directly reduces the carbon footprint of shipping; a 5% speed reduction cuts CO2 emissions from a voyage by 10% and reduces required propulsion power by 15%. However, most marine engines are optimized for specific speeds, and operating below these speeds can lead to suboptimal engine performance. EPLO adjusts turbocharger and engine settings to match new load requirements, further improving efficiency and combustion quality.
Accelleron has received orders for over 20 EPLOs to date, many for multiple sister vessels, as shipowners seek cost-effective solutions to extend compliance with existing vessel lifespans. Accelleron can undertake EPLOs either as a turnkey solution provider or in collaboration with the original engine manufacturer.
Matthias Reichmann, Product Manager Upgrades at Accelleron, said “The significant efficiency gains achieved for Höegh Autoliners demonstrate that EPLO, when executed optimally with turbocharger and engine setting optimizations, represents one of the most effective and cost-efficient solutions for reducing a vessel’s carbon intensity. Accelleron’s EPLO upgrade solution provides peace of mind for shipowners grappling with complex decarbonization requirements, offering a straightforward and impactful measure to comply with greenhouse gas regulations while realizing substantial fuel cost savings.”
What is Engine Part Load Optimization (EPLO)?
Engine Part Load Optimization (EPLO) is a strategic process aimed at enhancing the operational efficiency and sustainability of marine vessels. It involves fine-tuning engine parameters and optimizing turbocharger configurations to match the vessel’s actual operating conditions, particularly during partial load operations. By adjusting components such as turbocharger nozzle rings, turbine blades, and compressor wheels, EPLO ensures that engines operate more efficiently across a range of speeds and loads.
This optimization not only improves fuel efficiency but also reduces emissions, aligning with global maritime regulations for carbon intensity reduction. EPLO is increasingly adopted by shipping companies like Höegh Autoliners, in collaboration with partners such as Accelleron and Hanwha, to achieve significant fuel savings, lower operating costs, and maintain compliance with stringent environmental standards.
Source Accelleron