rss icon Subscribe
desktop mobile

Ship Power: MAN Energy Solutions Unveils New LNG Dual-fuel Engine

The new dual-fuel ME-GA engine from MAN Energy Solutions comes with the company’s proven Exhaust Gas Recirculation (EGR) technology for optimized performance, with specific gas/fuel oil consumptions reduced by ~3% and 5%, respectively.
(Photo: MAN Energy Solutions)

Tom Mulligan

In a live-stream presentation from its Copenhagen Research Center, MAN Energy Solutions has demonstrated advanced dual-fuel engine technology for low-cost, fuel-efficient operation of liquefied natural gas (LNG) carriers and other vessels where low capital outlay is a priority. Tom Mulligan, science &and technology correspondent, reports.

MAN Energy Solutions has demonstrated its latest low-speed, dual-fuel engine, the MAN B&W ME-GA type, an Otto-cycle variant of the company's successful ME-GI engine, at a ceremony live-streamed from its Copenhagen Research Center. The engine delivers a low capex solution aimed at certain vessel types and applications, such as LNG carriers, which are able to use 'boil-off' gas as a source of fuel, or smaller ships where low capital outlay is a priority.

Minimal operational costs
Based on the well-proven MAN B&W dual-fuel design with minimal installation requirements, the MAN B&W ME-GA uses an efficient ignition concept and unique gas admission system designed to deliver safe and reliable operation. Furthermore, the ME-GA features minimal operational costs, simple supply and purging concepts, and low maintenance costs for its fuel-gas supply system.

Wayne Jones OBE, Chief Sales Officer, MAN Energy Solutions, commented, "We initiated this ME-GA project in late 2017 when we recognized a strong market desire for a lower-cost alternative to the ME-GI engine, driven primarily by the LNG carrier market. Crucially, this new supplement to our dual-fuel portfolio continues our mission to decarbonize shipping and further the maritime energy transition to sustainable fuels."

MAN Energy Solutions' portfolio of two-stroke, dual-fuel engines has accumulated over 1.6 million operating hours from the 155 engines (6.3 GW) currently in service, all running on clean fuels such as LNG, liquefied petroleum gas (LPG), ethane and methanol. With fuel prices and availability currently in flux, the company expects the option of retrofitting to dual-fuel engines to increasingly become a necessity.

Pre-mixed Otto cycle operation with exhaust gas recirculation
The MAN B&W ME-GA dual-fuel engine works on a pre-mixed Otto cycle combustion principle in which scavenging air is let into the cylinder as the piston reaches bottom dead center (BDC) followed by gas being admitted as the piston moves upwards in the cylinder liner. The pre-mixed air-fuel mixture is then ignited by means of pilot oil, combustion occurs, and the piston moves downwards, completing the cycle. An engine-mounted Gas Regulating Unit (GRU) enables depressurization of the system and the nitrogen purge block mounted at the aft of the engine enables purging without dedicated blow-off piping.

MAN Energy Solutions has included its proprietary exhaust gas recirculation (EGR) system as an emissions solution for the new engine. EGR is a NOx emissions reduction technique that ensures IMO Tier III compliance in both diesel and gas mode. The EGR system will enable the ME-GA to reduce specific gas consumption by about 3%, and specific fuel-oil consumption by 5% and will also significantly reduce methane slip by 30 to 50% as well as solve the issue related to pre-ignition on Otto-cycle engines.

Other design concepts of the ME-GA engine include a G70ME-C10.5-GA cylinder condition with a ring package that ensures even pressure distribution and minimum deposit build-up in the ring grooves, while also providing significantly more robustness against ring collapse.

MAN Energy Solutions aims to start testing the first, commercial ME-GA design by the end of this year, with the first engine delivery following in early 2022.


imageBased on the proven MAN B&W dual-fuel design, the MAN B&W ME-GA uses an efficient ignition concept and unique gas admission system designed to deliver safe and reliable operation. Pictured is the new engine under test at the MAN Energy Solutions Research Center Copenhagen. (Photo: MAN Energy Solutions)

Mar 24, 2021

 

Technology

Offshore Lighting Solutions Firm Glamox Buys Luminell

Credit: Luminell (File Photo)

Glamox, a supplier of lighting solutions to the marine and offshore markets, has signed an

Shipbuilding: HII Celebrates 154 Apprentice School Grads

About 154 graduates of The Apprentice School at Newport News Shipbuilding were honored during graduation exercises on April 17, 2021. Due to COVID 19, the ceremony was held outdoors at the Hampton Roads Convention Center to ensure the safety of all graduates and guests, as well as event staff. Photo by Ashley Cowan/HII

Huntington Ingalls Industries (NYSE:HII) hosted commencement exercises on Saturday, April 17, 2021

Maritime Digitalizaton: The Electronic Lookout

Vessel safety will benefit with technology enhancing the bridge lookout. Image credit ABB

Evidence mounts that vessel safety will benefit with technology enhancing the bridge lookout.

Marine Propulsion

Rolls-Royce's Power Systems Profitable Despite 17% Revenue Plunge

Photo courtesy Rolls-Royce's Power Systems

Rolls-Royce's Power Systems division has ended the 2020 financial year with an underlying

Canadian Car Ferry to Feature Schottel Propulsion

Credit; Schottel

German propulsion maker Schottel has been awarded a contract to deliver main propulsion units for

MAN Hybrid Propulsion Package for Indonesian Navy's New Minehunters

credit man.jpg

German yard Abeking & Rasmussen has begun the construction of two minehunting vessels for the

Maritime Apps