Reduce your carbon footprint with the new MAN L21/31DF-M methanol GenSet
The maritime industry is decarbonizing and methanol is currently one of the leading fuels among the alternative fuel solutions. Following the market demand and rising interest, we hereby introduce the new MAN L21/31DF-M methanol GenSet - the first small-bore dual-fuel methanol GenSet in our portfolio.
MAN Energy Solutions in Frederikshavn, Denmark is home of the MAN L21/31DF-M, our first small-bore GenSet fueled by methanol.
Proven GenSet design
The foundation of this new engine is based on the current L21/31 GenSet and its well-proven technology, which has already accumulated more than 110 million operating hours, with thousands of engines in service.
This engine runs on methanol or conventional fuels. When powered by green methanol, it has the potential to reduce greenhouse gas emissions. The possibility to operate GenSets on green methanol as drop-in fuel further increases the fuel-flexibility.
Reliability and low fuel consumption
The new engine type keeps up the reliability and low fuel consumption of the MAN L21/31, ensuring security of power supply and handling of load steps with confidence. The power range spans 1,000-1,980 kW which makes this auxiliary engine the ideal candidate for most merchant vessels.
A methanol conversion will be available as retrofit for existing MAN 21/31 GenSets with delivery from 2025 onwards.
Perfect design features for efficient and reliable operation
The L21/31DF-M comes with a cost-optimised, low-flashpoint fuel supply system which makes it a competitive solution.
Furthermore, the port fuel injection (PFI) concept provides additional simplicity and an attractive capital outlay. And it is based on proven components.
Long time between overhaul intervals will save you time and costs on engine maintenance and will give you additional flexibility for the planning of your maintenance slots.
|900 / 1,000 rpm (60 Hz / 50 Hz)
|1,000 – 1,980 kW
|5 – 6 – 7 – 8 – 9
|HFO, MDO, MGO, LSFO, ULSFO, Biofuels, MeOH
|IMO Tier III with SCR after-treatment
The port fuel injection (PFI) system uses a methanol injection nozzle installed outside the combustion chamber. This simplified design removes the risk of blocked nozzles in diesel mode and reduces investment costs thanks to its easy installation and integration with standardized components.
MAN SaCoS ensures fast and reliable data-transfer between the engine and the power management system in the control room by easy cable connection.
The engine control system is attached to the engine and features a user-friendly color display in multiple languages. The electric speed governor enables fast response.
The first MAN B&W ME-LGIM came into service in 2016. Since then, we have accumulated more than half a million running hours on methanol alone, which provides a solid base for new developments. The L21/31DF-M is a perfect match for this methanol-fueled propulsion engine.
What makes the new methanol-fueled MAN L21/31DF-M GenSet special? Watch our 3D engine animation to find out more about the working principles, and also the Port Fuel Injection system.
Service solutions for your equipment
MAN PrimeServ offers a range of modernization solutions for optimizing the reliability, availability, and economic efficiency. MAN’s upgrade and retrofit solutions are tailor-made to customers’ specific applications and equipment.
Inside the making of a methanol GenSet
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Set course to net zero with methanol GenSets - MAN L21/31DF-M
Watch the recording of our MAN ExpertTalk, where we introduced our new engine type: the small-bore four-stroke MAN L21/31DF-M GenSet for methanol operation.
You can look forward to hearing about this new GenSet type, the Port Fuel Injection (PFI) concept, the fuel gas supply system and the possibility to operate these GenSets on green methanol and biofuel oils.