Swiss marine power company WinGD has announced a new feature for its X-DF-A ammonia-fueled engines, enabling them to be delivered with the capacity to run on liquefied petroleum gas (LPG). The newly introduced ‘pre-fit’ option targets vessels being constructed for the expected surge in global ammonia trade, offering flexibility by allowing these ships to transport LPG as well.
Known as X-DF-P, the system gets its name from propane, the primary component of LPG. The solution is set to debut in 2027, aligning with the anticipated point when operators will need to finalize their decisions on the balance between ammonia and LPG trades. While the X-DF-A engine is optimized for ammonia, the ‘pre-fit’ LPG configuration ensures efficient and reliable operation with only minimal adjustments required later for ammonia use.
WinGD’s Vice President of R&D, Sebastian Hensel, emphasized the strategic importance of this development, stating: “This development highlights our continuous innovation in support of smarter sustainable ship power solutions. Our X-DF-A ammonia engine is already enjoying wide uptake amongst bulk carriers and gas carriers; the X-DF-P offers a valuable intermediate step for gas carrier operators who are keen to participate in the emerging ammonia trade but are uncertain about the timing and impact on vessel engines and fuels.”
As ammonia continues to gain momentum as an energy carrier, especially due to its potential in transporting hydrogen from distant renewable production sites, operators are preparing for its widespread adoption. However, with uncertainties still surrounding the timeline of this transition, the option to use LPG provides significant flexibility.
Many operators are already placing orders for the X-DF-A engine, which is expected to power a range of multi-gas carriers, very large gas carriers (VLGCs), and very large ammonia carriers (VLACs). WinGD’s system ensures that only minor adjustments are needed to switch between LPG and ammonia, as both fuels share similar material requirements for the engine components.
The new engine sizes under development—specifically the 52- and 62-bore engines—are designed to suit vessels operating in the ammonia and LPG trade, positioning WinGD as a key player in the transition to more sustainable marine fuel alternatives.
