MAN’s ammonia test engine runs at 100% load

The ME-LGIA test engine at the Research Centre Copenhagen

(Source: MAN Energy Solutions)

MAN Energy Solutions’ two-stroke ME-LGIA (Liquid Gas Injection Ammonia) engine, undergoing tests at the engine company’s Research Centre Copenhagen facility, has operated at 100% load for the first time, the MAN has reported. Its proprietary selective catalytic reduction (SCR) system was in operation to treat exhaust gases at all test loads, it said, and all supply and safety systems worked as intended.

The engine firm’s head of Two-Stroke Research & Development, Ole Pyndt Hansen, commented: “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”, he continued. “Furthermore, the positive emission and performance characteristics from previous, single-cylinder tests have now also been validated in full-scale engine operation.”

The company’s Christian Ludwig, head of Global Sales & Promotion, Two-Stroke Business, said: “The ME-LGIA concept is based on the Diesel-cycle combustion principle, which makes it eminently suitable for power take-off (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.”

The next phase of engine testing will focus on performance and emission optimisation, including injection and SCR systems, as well as control strategies.

 

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