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.
Key benefits
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.
Technical specifications
| Description | Main data |
Bore | 210 mm |
| Stroke | 310 mm |
| Speed | 900 / 1,000 rpm (60 Hz / 50 Hz) |
| Output | 1,000 – 1,980 kW |
| Cylinder configurator | 5 – 6 – 7 – 8 – 9 |
| Available fuels | HFO, MDO, MGO, LSFO, ULSFO, Biofuels, MeOH |
| Emission limit | IMO Tier III with SCR after-treatment |
Optimized port fuel injection
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 control system and cybersecurity
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.
Perfect match for MAN B&W ME-LGIM two-stroke methanol engine
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.
Are you ready for green methanol?
Newbuild or retrofit? What are the costs? What are the benefits? Take the lead in sustainable shipping by contacting us today!
Continue reading
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.