Swiss marine power company WinGD has signed a memorandum of understanding with KSS Line to explore X‑DF‑A engines for future newbuild projects. The companies will focus on 52cm- and 62cm-bore versions of the dual-fuel ammonia engines, suitable for midsize and very large gas carriers (VLGC).

The agreement is the latest of several collaborations under which WinGD is working with experts from across key shipbuilding locations and vessel segments to develop its ammonia capabilities.

The scope of the cooperation will extend beyond engine technology, also focusing on the performance and maintenance solutions necessary for using alternative fuel. The partners will also explore how deep insights into the engine performance can be provided through the deployment of WinGD’s Integrated Digital Expert (WiDE), enabling fuel efficiency fine tuning and live 24x7 support from engine experts.

The agreement also includes a commitment from WinGD to deliver crew training for new engines. The company is building significant experience in equipping crew for safe and reliable ammonia-fueled engine operations, having agreed in June to develop and support the implementation of a training syllabus for AET Tankers and maritime academy Akademi Laut Malaysia.

Ammonia as fuel is an interesting prospect for gas carrier vessels that already carry ammonia as cargo. The combination of our rigorously tested new engine design, training support and real-time optimization via WiDE will mean that KSS Line can be confident that early experience with ammonia-fueled vessels will be translated into safe and reliable operation in the long-term.

—Volkmar Galke, Director Sales, WinGD

WinGD is due to begin validation of its ammonia-fueled engine concept on single and multi-cylinder test engines, in Winterthur and Shanghai, later this year. The validation tests follow combustion concept testing that began in 2021, in concert with simulation and rig tests to understand the emissions characteristics and injection requirements of ammonia fuel.

The X‑DF‑A engine, like its methanol-fuelled counterpart X‑DF‑M, will operate on a high-pressure Diesel-cycle combustion process, with liquid ammonia fuel injection supported with a low portion of pilot fuel.