LNG cargo engine solutions

Dual-fuel engines for changing conditions

While demand for LNG carriers is high, so are the standards that these very special vessels must attain. As well as answering safety concerns, LNG cargo vessels must operate efficiently to maintain profitability while complying with the strict IMO environmental regulations. That still leaves uncertainty over future fuel developments. Our solution builds on the flexibility of our four-stroke dual-fuel engines, highly efficient methane slip reduction techniques, and innovative concepts like the Dual-Fuel, Electric+ (DFE+) propulsion system.

Superior efficiency in operation and costs

The 35/44DF CD’s (former MAN 35/44DF CD) high power density quite simply means fewer gensets are needed on the vessel. As well as reduced CAPEX, its efficiency also means lower OPEX. The 49/60DF (former MAN 49/60DF) has set a new benchmark in fuel efficiency with its output of 1300kW per cylinder and guarantees competitive vessel operation.

Reduced methane slip and CO2 emissions

Everllence engines tackle the challenge of methane slip with innovative solutions. Optimized methane combustion in the 35/44DF CD (former MAN 35/44DF CD) lowers methane slip by up to 85% compared to current industry standards. The 49/60DF’s (former MAN 49/60DF) efficiency and low methane slip ensure compliance with emissions legislation until 2035 at least. Tier III emissions compliance is assured with selective catalytic reduction (SCR) in diesel operation. No SCR is needed for gas operation.

Operational flexibility for four-stroke engines

By allowing variable speed operation over the entire engine load, the DFE+ concept provides the operational flexibility you need to cut LNG carriers’ carbon footprints and fuel bills. It also improves efficiency by significantly reducing methane slip over the entire engine map. In general, fuel flexibility gives you the option to extend all the way to zero-carbon methanol retrofits.

LNG cargo four-stroke engine portfolio

Future-proof dual-fuel efficiency is the common factor uniting the 35/44DF CD (former MAN 35/44DF CD) auxiliary genset and the 49/60DF (former MAN 49/60DF) propulsion engine with DFE+. Both engines offer small footprints, high power density, and high configuration flexibility, making them easy to integrate in different LNG cargo vessel types.

35/44DF CD genset with zero compromises

The 35/44DF CD (former MAN 35/44DF CD) offers superior efficiency and reduced methane slip, leading to decreased emissions and a more environmentally friendly footprint. With 560 kW per cylinder, the engine yields the highest power output in its segment. Its reliable technology reduces daily maintenance and maximizes time between overhauls (TBOs) while ensuring safe operation in all fuel modes.

Find out more about the 35/44DF CD

49/60DF as part of the DFE+ propulsion system

The 49/60DF (former MAN 49/60DF) has set new benchmarks in efficiency with 170.3 g/kWh liquid fuel consumption at 85% MCR and 6,990 kJ/kWh gas consumption at 85% MCR. With its low methane slip, it meets emissions standards without compromising on efficiency or performance. Integrated in a DFE+ propulsion system, the 49/60DF helps lower emissions and fuel consumption thanks to increased operational flexibility, offering another path for compliance with future emission regulations.

Find out more about the 49/60DF

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Setting new standards in marine efficiency and flexibility

Our new flagship engine, the four-stroke 12V49/60DF, has successfully passed its Type Approval Test on the testbed at the Everllence headquarters in Augsburg. This dual-fuel innovation sets new benchmarks in performance, reliability, and future-readiness, supporting a sustainable and adaptable marine industry. Watch the recap video and discover the 49/60DF.

Dual-Fuel, Electric+ increases cargo capacity and lowers fuel costs

The new Dual-Fuel, Electric+ (DFE+) propulsion concept for LNG carriers brings together the 49/60DF (former MAN 49/60DF) engine and ABB’s Dynamic AC power distribution and control system. Whereas conventional dual-fuel diesel electric (DFDE) propulsion sets a constant speed over the entire engine load, the DFE+ concept also requires less machinery space. This increases cargo capacity, which also contributes to overall energy savings.

Explore DFE+ in our interactive 3D experience