Wärtsilä reports that its ammonia-fueled four-stroke engine now delivers higher than ever levels of efficiency and performance. Following its introduction to the commercial marine sector in November 2023, the Wärtsilä 25 ammonia engine has undergone extensive testing to optimize its performance parameters. According to Wärtsilä, the latest results, assessed against the FuelEU Maritime reference and measured on both a Well-to-Wake and Tank-to-Wake basis, show that a 95% ammonia energy share now...
Engines & Fuel
Op-Ed: Hydraulic fluids and the future of compliance
By Joe Weinand, Industrial Lubrication Specialist, Chevron
Behind every successful marine operation lies an increasingly complex challenge: meeting increasingly stringent environmental standards for hydraulic fluids without sacrificing performance. Operators are under pressure to address fluid toxicity, biodegradability, and bioaccumulation potential while maintaining the operational demands of their equipment.
Hydraulic fluids have long played a central role in keeping maritime operations...
World’s most powerful methanol engine set for delivery
MAN Energy Solutions reports that it will deliver the world’s most powerful methanol engine in June 2025. Rated at 82,440 kW @ 80 rpm, the engine, an MAN B&W 12G95ME-C10.5-LGIM (-Liquid Gas Injection Methanol) type, is currently being built by Chinese licensee, CSSC-MES Diesel Co., Ltd. (CMD).
The engine poised to take the “most powerful methanol engine” crown is the first of 12 being built to power a series of twelve 24,000 TEU container vessels currently under construction: seven at Nantong...
https://www.marinelog.com/technology/worlds-most-powerful-methanol-engine-set-for-delivery/
MAN L35/44DF CD genset passes Type Approval Test
MAN Energy Solutions reports that the two dual-fuel versions of its MAN L35/44DF engine have both successfully completed Type Approval Testing (TAT) for auxiliary genset and electric propulsion application at constant speeds, respectively, of 720 and 75 0 rpm. The TAT involved the testing of both the methane-capable 35/44DF CD and the methanol-ready 35/44CD.
Testing took place from April 7 – 11 at the Changwon headquarters of STX Engine in South Korea with the participation of six classification...
https://www.marinelog.com/news/man-l35-44df-cd-genset-passes-type-approval-test/
ABS gives new safety insights into using ammonia as a fuel
How does ammonia behave when it leaks in an engine room? How does a cloud of escaped ammonia disperse during bunkering operations?These and many other critical safety questions that must be understood if ammonia is to become widely adopted as a marine fuel are addressed in new ABS publication, “Safety Insights for Ammonia as a Marine Fuel.”
The new safety insights publication brings together the findings of ABS research into the performance of ammonia on board.
ABS performed computational fluid...
https://www.marinelog.com/news/abs-gives-new-safety-insights-into-using-ammonia-as-a-fuel/
Wärtsilä introduces NextDF methane slip reduction for a third engine
Wärtsilä has introduced its NextDF technology for a third engine, the Wärtsilä 46TS-DF dual-fuel engine. While operating on liquefied natural gas (LNG), the Wärtsilä 46TS-DF engine with NextDF feature reduces methane emissions to less than 1.4% of fuel use across all load points, achieving emissions as low as 1.1% in a wide load range. This is nearly three times lower than the default methane slip factor of 3.1% specified in the FuelEU Maritime and IMO lifecycle guidelines for Otto-cycle...
Podcast: Ammonia’s voyage into marine power with Amogy
On this episode of Marine Log’s Listen Up! Podcast, we sit with Janna Chernetz, senior director of global government & regulatory affairs at Brooklyn, New York-headquartered ammonia-to-power innovator Amogy, on using ammonia as a fuel in its recent tug project and what that means globally for maritime.
Listen now on SoundCloud or Spotify below!
The ammonia tug project, named the NH3 Kraken, is the world’s first carbon-free, ammonia-powered vessel of any kind, according to the company.
The NH3...
https://www.marinelog.com/podcasts-1/podcast-ammonias-voyage-into-marine-power-with-amogy/
New Ibaizabal LNG bunkering vessel will be Wärtsilä 25DF powered
Wärtsilä will supply three Wärtsilä 25DF dual-fuel engines for a new 18,600 cubic meter capacity LNG bunkering vessel being built for Spanish operator Ibaizabal at China’s Hudong-Zhonghua Shipbuilding. The engines will feature Wärtsilä’s NextDF technology, which reduces methane emissions when operating with LNG fuel.
LNG is an important transition fuel as the marine industry strives to reduce its carbon footprint. However, the main component of LNG...
https://www.marinelog.com/news/new-ibaizabal-lng-bunkering-vessel-will-be-wartsila-25df-powered/
Corvus marine battery system receives LR type approval
Corvus Energy, Bergen, Norway, recently announced that it has received type approval from Lloyd’s Register (LR) for its Dolphin NxtGen Energy marine battery system.
The LR type approval confirms that the energy dense and lightweight energy storage system (ESS) complies with the stringent rules, regulations, and safety requirements in the industry, as defined by one of the leading maritime class societies.
Safety features and modular designThe Corvus Dolphin NxtGen Energy design features safety...
https://www.marinelog.com/news/corvus-marine-battery-system-receives-lr-type-approval/
FMD selected to supply main propulsion engines for T-AO 214
General Dynamics NASSCO has awarded Fairbanks Morse Defense (FMD) a contract to build and deliver the main propulsion diesel engines for the Military Sealift Command’s future USNS Dolores Huerta (T-AO 214).
The USNS Dolores Huerta is the 10th vessel in the John Lewis-class of fleet replenishment oilers. It will be powered by two 12V 48/60 CR main propulsion engines and two 71 32/44 CR service diesel engines, all manufactured at FMD’s Beloit, Wisconsin, facility.
Each engine will feature a common...
https://www.marinelog.com/news/fmd-selected-to-supply-main-propulsion-engines-for-t-ao-214/