Everllence marks a major breakthrough in green shipping with the successful 100% hydrogen testing of its 35/44DF H2 engine.
Germany-based Everllence has upgraded a research-engine test bench at its Augsburg site to enable hydrogen combustion, specifically testing a single-cylinder 35/44DF H2 engine on 100% hydrogen.“The first 100% H2 engine, a single-cylinder 35/44DF H2 engine, was successfully commissioned at Everllence’s Augsburg site in late-2025 and has already run on 100% hydrogen,” said the company.
This development was completed under the “HydroPoLEn” project, which is a partnership with industry leaders and research institutes supported by funding from the German Federal Ministry for Economic Affairs and Energy.The project designed and tested a combustion process and mechanical components specifically for hydrogen operation. This newly developed process increases power density during hydrogen use.Alongside the engine tests, a dedicated hydrogen infrastructure was established at the Augsburg site to support current research and future technology development.Re-engineering engine architecturesThe project focused on re-engineering engine architectures to manage the properties of hydrogen. The team developed a combustion process that increases power density while creating mechanical components optimized for hydrogen operation.Additionally, the new hydrogen supply infrastructure in Augsburg establishes the site as a functional hub for alternative fuel research.The HydroPoLEn consortium includes several technical and industrial partners. Everllence serves as the lead developer and engine manufacturer.WTZ provides engine testing and thermodynamics expertise, while the NMA at the Technical University of Munich conducts academic research and modeling.Tenneco provides component manufacturing and thermal management, and Carnival Maritime acts as an associated partner representing the requirements of the cruise industry.Viable option for decarbonizing marine mobilityProject leaders noted that while the technical hurdles of safety systems and component adaptation have been addressed, the technology is in the early stages of market readiness.Dr. Cornelius Wagner, HydroPoLEn Project Manager, stated that these developments indicate that hydrogen is becoming a viable option for the decarbonization of passenger ships.Dr. Matthias Auer, Head of Performance and Emissions at Everllence, noted that hydrogen will play a role alongside ammonia and methanol in future maritime propulsion.He stated that because no single technology will be optimal for all applications, companies must evaluate multiple fuel options.Dr. Alexander Knafl, Senior Vice President R&D Four-Stroke, added that the hydrogen engine serves as a foundation for future marine mobility.Broad industry trendsEverllence stated that this development is part of its ongoing work toward propulsion systems for maritime applications.The maritime sector continues to evaluate various fuels to meet environmental targets, as hydrogen, ammonia, and methanol remain the primary candidates to replace traditional heavy fuel oils.In a separate advancement for hydrogen power, researchers at the Karlsruhe Institute of Technology in Germany have set a runtime record for a compressorless gas turbine.While previous tests lasted only a fraction of a second due to the risk of melting combustion chambers, the team recently ran the turbine for 303 seconds.This surpasses a 250-second record previously held by NASA. The KIT researchers also used the hydrogen-powered turbine to produce electricity, establishing a path for future carbon-free energy sources.
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