Wärtsilä has launched its advanced 4-stroke ammonia engine, enhancing efficiency and performance in the commercial marine sector. Following extensive testing, the engine achieves a remarkable 90% reduction in greenhouse gas emissions compared to diesel engines, marking an 18% improvement in emissions performance. This engine is part of the Wärtsilä 25 platform, leveraging the company’s experience with low-pressure dual-fuel engines.
The ammonia engine utilizes a low-pressure Otto cycle design, chosen for its safety and efficiency advantages. Tests confirm that this design matches the efficiency of dual-fuel LNG engines while offering robust combustion capabilities. Wärtsilä emphasizes continuous improvement and safety, integrating advanced features into the engine’s design to support the shipping industry’s decarbonization goals.
The Wärtsilä ammonia solution includes a comprehensive fuel gas supply system and exhaust after-treatment technologies, ensuring optimal performance and safety. This enhanced engine performance is set to be incorporated into future and existing engine orders, with initial deliveries anticipated from 2026.
As the shipping industry aims for net-zero emissions by mid-century, ammonia is positioned as a critical alternative fuel. Wärtsilä’s findings indicate that sustainable fuels like ammonia will be essential in addressing the remaining emissions after current decarbonization measures.
Share it now
