MAN B&W ME-GI prepares your fleet for future regulations
The MAN B&W ME-GI two-stroke dual-fuel engine provides a future-proof solution for LNG/methane-powered vessels thanks to its negligible methane slip and high fuel efficiency.
Based on one of the industry’s most trusted platforms, the MAN B&W ME-GI uses a high-pressure fuel supply system and is suitable for many types of vessels. The engine achieves exceptionally low methane slip emissions and provides a large degree of flexibility for meeting emissions regulations, now and in the future. We have also refined and simplified the design, upgrading key components, and improving reliability.
The world’s most efficient engine for methane as a fuel
Perfect for new builds or retrofits, the MAN B&W ME-GI minimizes operating costs by delivering high industry-leading thermal efficiencies no matter which fuel is used. This is a huge advantage, especially for container vessels in a market with fluctuating fuel prices. The ME-GI can also be fueled with bio-methane as well as synthetic natural gas, providing a clear route towards greenhouse gas reductions.
Next-generation performance and efficiency
Key benefits
- Proven two-stroke MAN B&W engine technology
- Minimal environmental impact (low emissions thanks to negligible methane slip and reduced CO2 emissions)
- No need to compensate with liquid oil fuels to accommodate low methane numbers or high ambient temperatures
- Flexible operation using fuel oil or LNG
- Knocking is not an issue
- Supports waste heat recovery (WHR)
- Easy retrofit compared to Otto cycle engines
Low OPEX
The ME-GI is built for low OPEX, delivering the same industry-leading thermal efficiency no matter which fuel is used. This is a huge advantage in a fluctuating fuel market where LNG bunkering will become the norm. The auxiliary equipment costs have been reduced and the engine’s installation is simplified. Furthermore, key components have been updated to improve performance and deliver a more environmentally friendly solution.
Component upgrades
The new MAN B&W ME-GI incorporates a range of key component upgrades that improve reliability, maximize efficiency and lower OPEX, helping you to stay competitive in a challenging market.
- Lowest gas consumption of any marine two-stroke engine
- Simplified piping system provides a more compact solution with fewer components, and therefore lower maintenance costs
- New gas block with an improved window valve enables cut-out of an individual cylinder operating on gas, while allowing continued operation on fuel oil
- Updated pilot oil injection system enables the pilot oil energy fraction to be lowered to just 1.5% at 100% load for L1 rated engines in certain bore sizes*
- Optional compact pump vaporizer unit features embedded redundancy (3 x 50%) and integration with the ME-GI engine control system
*Performance values indicated refer to energy fraction for L1 rated engines operating at 100% load point in Tier II mode. Actual values may vary depending on engine rating and load conditions.
Frequently asked questions
For which vessel types is the ME-GI engine especially suited?
The MAN B&W ME-GI two-stroke engine is ideal for the application on LNG carriers, PCTCs, VLCCs, tankers, container vessels, and bulk carriers.
How is a negligible methane slip on the ME-GI engines ensured?
Low methane slip on MAN B&W ME-GI two-stroke engines can be achieved due to different factors:
1. Use of the diesel cycle which ensures complete combustion due to very high combustion temperatures as well as a rich mixture
2. A high compression ratio
3. An optimal design of the combustion chamber and components
Can MAN B&W ME-GI engines be also operated on biomethane and SNG?
Biomethane has a high energy density and is affordable. Biomethane can also reduce CO2 emissions proportionately. SNG can seamlessly be phased into global gas supplies according to availability. Both, biomethane and SNG are optimally suited for the ME-GI engine.
What is PVU? What function does it have in a MAN B&W ME-GI engine?
The ME-GI/GIE Pump Vaporiser Unit (PVU) is a standardized high-quality pump unit for the supply of methane to MAN B&W ME-GI engines. With its compact and intelligent design, PVU provides a lean design and integration in the fuel gas supply system (FGSS). It is highly compatible with MAN B&W ME-GI engines and supports monitoring by PrimeServ Assist.
Service solutions for optimum cost efficiency of your MAN B&W ME-GI engine
Explore your options for the MAN B&W ME-GI
The new MAN B&W ME-GI two-stroke dual-fuel engine is built to support your power needs today and for the future.
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Related news
ME-GI Engines Bound for Thriving Chinese Market
Yangzijiang Shipbuilding Group has ordered 10 × MAN B&W 7G80ME-C10.5-GI engines in connection with the construction of 10 × 7,000-teu container ships for Seaspan Corporation, the world's largest, independent container vessel-owner.
The contract includes an option for five further vessels. Engine delivery is scheduled from October 2023 to 2024; Seaspan has already chartered the ships on long-term contracts.
Upon completion, the newbuildings will become the largest ME-GI-powered container vessels built by a Chinese shipyard.
Thomas S. Hansen, Head of Promotion and Customer Support, MAN Energy Solutions, said: “Our ME-GI engine continues to enjoy success within new vessel segments – including non-LNG-bearing carrier applications – primarily due to the ever-increasing focus on methane-slip reduction and fuel efficiency. This latest mark of the engine comes with a gas-optimised tuning that significantly improves fuel efficiency when operating on gas, while simultaneously maintaining an industry-leading, low methane-slip of just 0.20-0.28 g/kWh over its entire load range.”
Over the course of the past year, MAN Energy Solutions reports that it has received multiple orders from Chinese shipyards for ME-GI engines for a broad variety of projects including pure car-truck carriers (PCTCs), bulk carriers, and oil tankers. Hansen added: “The Chinese market has great potential for us and we plan to increase the more than 1.8 million running-hours that the ME-GI has accrued to date running on LNG alone.”
The ME-GI engine – the new industrial standard
MAN Energy Solutions successful ME-GI (-Gas Injection) engine has set a new industrial standard for two-stroke propulsion engines aboard – among others – container vessels, bulk carriers, tankers, LNG carriers and car carriers. The ME-GI engine provides ship-owners and operators with a peerless solution within environmentally friendly and high-efficiency, two-stroke technology, without the greenhouse emissions such as methane slip that are characteristic of competing engines.
With the ME-GI engine, two-stroke development has taken a step further by combining the unique properties of multi-fuel combustion and the well-known reliability of MAN Energy Solutions ME-engine. The Diesel principle not only provides the ME-GI engine with high operational stability and efficiency, but also ensures 100% reliable operation during load changes on gas with just normal additions of pilot-oil amounts. Furthermore, the ME-GI operational principles features a seamless change-over between gas operation and diesel operation. The ME-GI engine is the most environmentally friendly, technology available within the two-stroke engine segment.
MAN Energy Solutions has also developed an ME-LGI (-Liquid Gas Injection) dual-fuel engine that expands the company’s dual-fuel portfolio, enabling the use of more sustainable fuels such as methanol.
Documents
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20211123_MAN_ES_PR China 10xME-GI_EN
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20211123_MAN_ES_PR China 10xME-GI_DE
Contact
Nils Søholt
Trade Press Marine
Group Communications & MarktingEverllenceTeglholmsgade 412450 Copenhagen SVDenmark
nils.soeholt@everllence.com t +45 33 85 26 69Available languages
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Methane-fuelled MAN B&W ME-GI two-stroke engine
The MAN B&W ME-GI has been in service for more than a decade already, and with a continuous focus on optimizing the engine design, it remains a preferred choice across vessel segments and sizes.
Watch the recording of our two-stroke MAN ExpertTalk where we take a closer look at the new 10.7 engine platform, the improved gas return system, and general engine availability.
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