Ammonia marine engine design for enhanced efficiency and reduced | ResearchBunny

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Abstract

This study introduces in-cylinder reforming gas recirculation (IRGR) to enhance the thermal efficiency and reduce emissions in pilot-diesel-ignition ammonia combustion engines. One cylinder operates rich, partially decomposing ammonia into hydrogen. This hydrogen-enriched exhaust is recirculated, combining the benefits of hydrogen-enriched combustion and exhaust gas recirculation. Results show a 15.8% increase in indicated thermal efficiency and significant reductions in unburned NH3, N2O, and greenhouse gases compared to traditional ammonia engines, even achieving 94% GHG reduction compared to pure diesel.

Publisher

Nature Communications

Published On

Mar 07, 2024

Authors

Xinyi Zhou, Tie Li, Run Chen, Yijie Wei, Xinran Wang, Ning Wang, Shiyan Li, Min Kuang, Wenming Yang

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