GEAR | Lloyd’s Register awards approval in principle for ammonia two-stroke engine
WinGD has secured an approval in principle (AIP) from classification society Lloyd’s Register (LR) for its two-stroke engine fuelled with ammonia.
WinGD said the first example of the ammonia-fuelled engine, the 52-bore X52DF‑A, will be available for delivery from the fourth quarter of 2024. It will be applicable for a range of vessels including gas tankers and bulk carriers.
WinGD was able to validate to LR experts that the X52DF‑A concept is technically ready to satisfy future regulatory requirements with no major obstacles. As part of the AIP process, LR considered the engine safety concept, risk assessments, and preliminary engine and fuel supply system design, as well as confirming the compatibility of materials with ammonia fuel.
WinGD will extend the X‑DF‑A platform to a 72-bore variant in 2025 followed by other engine sizes in 2026 according to market needs, accommodating a wide range of vessel types from small tankers and car carriers to very large tankers. The engines operate according to the diesel principle in both diesel and ammonia modes, have the same rating field as WinGD’s existing diesel engines, and will be available with the same cylinder configurations.