WinGD wins LR approval in principle for ammonia-fueled two-stroke engines

Written by Nick Blenkey
WinGD single cylinder ammonia-fueled two-stroke test engine.

WinGD single cylinder ammonia test engine. [Image: WinGD]

As the race to be first to market with future-fueled engines picks up pace, Lloyd’s Register has granted Winterthur, Switzerland, headquartered engine designer WinGD the first ever approval in principle (AiP) for its ammonia-fueled two­­‑stroke engines. The AiP was awarded for WinGD’s X-DF-A dual-fuel range and gives shipowners the assurances they need to realize vessel designs using ammonia-fueled main engines.

WinGD says that its ammonia-fueled two-stroke engine series research has been advancing with strong support from shipowners, shipyards and engine builders. The first engine to be developed, the 52-centimeter bore X52DF-A, will be available for delivery from fourth 2024 and is applicable to a range of vessels including gas and bulk carriers.

“Time is of the essence as shipping looks to clean power solutions,” said WinGD CEO Dominik Schneiter. “This approval shows the industry that WinGD is leading the way in bringing carbon-free ammonia power to the deep-sea fleet. With the support of expert partners including Lloyd’s Register, these technologies will be available long before emission targets require them, giving operators vital space to plan and gain experience.”

“The maritime industry needs to trust that new technologies can be deployed safely as it continues to evaluate multiple transition pathways,” said Lloyd’s Register CEO Nick Brown. “This AiP will give first movers confidence that, subject to subsequent care in design, build, integration and operation, this ammonia two-stroke engine can help meet that demand. LR is delighted to have worked with WinGD on this groundbreaking development.”

WinGD was able to validate to Lloyd’s Register that the X52DF‑A concept is technically ready to satisfy future regulatory requirements with no major obstacles. As part of the AiP process, Lloyd’s Register 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 plans to extend the X‑DF‑A platform to a 72-centimeter 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.

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