Adding to its current four-stroke engine portfolio, MAN Energy Solutions has revealed the company’s new MAN 49/60DF dual-fuel engine. The latest propulsion system can run on LNG, diesel and Heavy Fuel Oil (HFO) in addition to biofuel blends and synthetic natural gas.
Said to be highly fuel efficient in gas and diesel modes, the 49/60DF is based on MAN’s new 49/60 engine platform which benefits from a host of modern technologies. This includes two-stage turbocharging, second-generation common rail fuel injection, the SaCoS 5000 automation system and the company’s next-gen adaptive combustion control ACC 2.0 which automatically optimizes combustion levels. The 49/60DF still features the company’s gas injection system, pilot fuel oil system and MAN selective catalytic reduction (SCR) system.
To comply with the International Maritime Organization’s Tier III regulations, the 49/60 can start in gas mode without any secondary measures. Furthermore, when started in diesel mode the engine also complies with Tier III regulations when combined with the SCR system.
MAN’s new common rail system 2.2 results in soot emissions being halved when running on diesel, with methane emissions also greatly reduced in gas mode compared to the previous iteration engine.
A pure diesel engine is planned for introduction in 2023 – based on the company’s 49/60 platform – which will be retrofit-ready to enable running on methanol and LNG if required.
“Dual-fuel engines are the ticket to the maritime energy transition,” said Wayne Jones OBE, member of the executive board, global sales & after sales – MAN Energy Solutions. “As we enter a new era of decarbonization, the 49/60DF is a great, new choice for vessel owners that have ambitious emission reduction targets on their agenda. In essence, it offers full fuel flexibility to operators who can then choose from the various decarbonization paths that open up as new fuels make their way into the marine industry.”
“The MAN 49/60DF is making its debut at a time where – while the number of LNG projects is still growing – alternative fuels like methanol, ammonia and hydrogen are continuing their rise, albeit with none having established market dominance as of yet,” added Marita Krems, head of four-stroke marine and license, MAN Energy Solutions. “Increasingly, it is crucial for new vessels to be driven by engines that provide options for emission compliancy over the vessel’s lifetime. Fuel flexibility and efficiency are the key features. In this respect, the 49/60DF distinguishes itself by offering a number of various emission paths. It also has a level of efficiency that ensures best fuel costs in many applications, especially within the cruise, RoPax, RoRo, dredger, and LNG carrier segments.”
