- The ME-LGIA ammonia engine has successfully run at 100% engine load.
- Testing has validated the ammonia fuel-injection system across the full load range.
- SCR systems operated effectively, with a focus on emission and performance optimization in the next phase.
- The engine’s Power Take-Off (PTO) capability has been successfully tested and aligned with Diesel-cycle engines.
MAN Energy Solutions has achieved a significant milestone in its ammonia-powered two-stroke ME-LGIA engine testing at the Research Centre Copenhagen. The engine successfully operated at full 100% load, demonstrating its capability to support future decarbonized maritime propulsion.
Safety and Performance Validation
Ole Pyndt Hansen, Head of Two-Stroke Research & Development, MAN Energy Solutions, said: “We began full-scale testing in November 2024 and have since proceeded in a cautious and safety-first way. We have now operated the engine on ammonia from 25–100% load, marking yet another important step forward in the maritime energy transition. As such, we have now validated the ammonia fuel-injection system over the full load-curve with diesel-pilot amounts recorded according to our targets. Furthermore, the positive emission and performance characteristics from previous, single-cylinder tests have now also been validated in full-scale engine operation.”
Emission Control and Next Testing Phase
The engine’s proprietary Selective Catalytic Reduction (SCR) system functioned effectively at all load levels, treating exhaust gases as expected. Moving forward, the next phase of testing will focus on optimizing engine performance, emissions, and control strategies.
Power Take-Off Capability
Christian Ludwig, Head of Global Sales & Promotion, Two-Stroke Business, MAN Energy Solutions, highlighted the ME-LGIA’s PTO (Power Take-Off) capability and said: “The ME-LGIA concept is based on the Diesel-cycle combustion principle, which makes it eminently suitable for PTO. Prior to this round of testing, we simulated PTO on the ammonia engine with very positive results and are very happy to see this replicated in real life. We intend to support PTO on the ME-LGIA to the same degree as with the other Diesel-cycle engines in our low-speed portfolio.”
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Source: MAN Energy Solutions
