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ME-GI ENGINE DEMONSTRATES MINIMAL METHANE SLIP ON SEA TRIALS

Wednesday, August 12, 2020 

Following sea trials of its largest gas engine to date, MAN Energy Solutions claims that its ME-GI (Gas Injection) engine has set a new industrial standard for two-stroke propulsion engines onboard among others LNG carriers, container vessels, car carriers and bulk carriers.

The gas system of the ME-GI engine provides an environmentally friendly and high-efficiency, two-stroke dual fuel solution, without the greenhouse gas emissions such as methane slip that are said to be characteristic of competing engines.

The ME-GI engine combines multi-fuel combustion with reliability. The Diesel cycle provides high operational stability and efficiency, while ensuring stable and 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 and diesel operation. As well as the ME-GI, MAN Energy Solutions has developed an ME-LGI (-Liquid Gas Injection) alternative that expands the company’s dual-fuel portfolio, enabling the use of other sustainable fuels such as methanol and liquefied petroleum gas (LPG).

The MAN B&W 11G90ME-GI, with MCR of 68,640kW, is installed in the first in a series of six neo-Panamax boxships – built by HSHI (Hyundai Samho Heavy Industries), and ordered by Eastern Pacific Shipping (EPS), the Singapore-based shipping company, and is equipped with the

newly-developed Pump Vaporizer Unit (PVU). This ship has successfully completed LNG gas trials in Korea, and will be on charter from EPS to French company CMA CGM, under the name of Tenere.

EPS CEO, Cyril Ducau, said: “The successful gas and sea trials and the on-schedule delivery of CMA CGM Tenere make for an important MAN and EPS milestone. Three years ago, we committed to investing in alternative marine fuels, like LNG, to lead the industry towards decarbonisation and environmental preservation. This commitment included selecting MAN's high-pressure ME-GI engines, which are highly efficient and, importantly, reduce methane slippage to negligible levels. These vessels will be IMO 2030 compliant years ahead of schedule and will be the cleanest vessels of their category on-the-water today. My sincerest thanks and congratulations to everyone involved in this exciting project."

MAN Energy Solutions adds that service experience from ME-GI operators so far has recorded a gas-availability rate of greater than 98%. This latest engine features several recent technical developments, including a PVU and Pilot Booster Injection Valve (PBIV). The PBIV employs smaller or larger atomising holes – depending on fuel mode – to inject fuel into engines. As such, in gas mode, the use of smaller holes significantly reduces pilot-oil consumption to just 1.5%, approximately half of what was previously required; diesel mode employs the larger-sized holes.

Bjarne Foldager, SVP and Head of Two-Stroke Business, MAN Energy Solutions, said: “I am delighted to receive the positive reports from these successful gas-trials where testing has proceeded smoothly according to the plan laid for the engine’s entry into service. I am also very encouraged by the reports of good cylinder conditions. The ME-GI engine is mature technology that has accumulated multiple references in multiple segments and is further improved by the introduction of the PVU, which ensures an optimal integration between the engine and supply system.”

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