Formerly MAN Energy Solutions; B&W two-stroke and four-stroke engines, turbochargers, propellers, fuel systems and PrimeServ service.
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Everllence L21/31DF-M and L27/38DF-M Methanol Dual-Fuel Engines
Small-bore four-stroke dual-fuel engines able to run on methanol or conventional fuels, for GenSet and diesel-electric propulsion use, based on the proven L21/31 and L27/38 platforms.
Description
The Everllence L21/31DF-M and L27/38DF-M (formerly MAN) are small-bore four-stroke dual-fuel engines that run on methanol or conventional fuels. They are based on the L21/31 and L27/38 GenSets, which have jointly accumulated more than 290 million operating hours with thousands of engines in service.
Key features
- Dual-fuel principle: operation on methanol (incl. e-methanol and bio-methanol as drop-in fuel) or conventional fuels
- Retain the reliability and low fuel consumption of the conventional engines
- Secure power supply and confident handling of load steps
- Conventional fuels supported: HFO, MDO, MGO, LSFO and ULSFO; biofuels also possible
- Everllence SaCoS safety and control system with engine-mounted control, colour display, multi-language interface and electric speed governor
L21/31DF-M
- First small-bore dual-fuel methanol GenSet in the Everllence portfolio
- Port fuel injection (PFI): methanol injection nozzle installed outside the combustion chamber, removing the risk of blocked nozzles in diesel mode and simplifying installation with standardized components
- Long time between overhauls (TBO)
- Matched to the Everllence B&W ME-LGIM two-stroke methanol main engine
L27/38DF-M
- Higher output; usable as GenSet or for diesel-electric propulsion
- Optimal methanol fuel share with only minimum fuel oil as pilot
- Cost-optimized low-pressure methanol supply system
Retrofit
Methanol conversion is available as a retrofit for existing L21/31 engines with delivery from 2025 onwards; for L27/38 GenSets the retrofit will be available later.
Applications
- GenSets on container vessels, tankers, bulkers and PCTCs
- Diesel-electric propulsion for smaller vessel types
Documents
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