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Nakilat retrofits QMax’s main engines to LNG fueling

Written by Nick Blenkey
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Nakilat operates the world's largest LNG carrier fleet


The project involved retrofitting two MAN B&W S70ME-C HFO-burning engines in the chartered Q-Max vessel Rasheeda with gas-burning M-Type Electronically Controlled – Gas Injection (ME-GI) Systems, which have now been successfully commissioned.

The retrofit modification meets all current and foreseen global emissions regulations.

Nakilat-Keppel Offshore & Marine (N-KOM) carried out the conversion at its Erhama bin Jaber Al Jalahma Shipyard facilities in the major Qatari port of Ras Laffan Industrial City.

The project collaborators, including MAN PrimeServ, installed the ME-GI system on the vessel at the shipyard in June 2015. The partner for the ME-GI fuel supply system is TGE Marine Gas Engineering GmbH,

Christian Ludwig, Head of Retrofit and Upgrades, MAN PrimeServ, said: "This is a fantastic milestone in our company's history. It is a lighthouse project, and there has been a remarkable partnership and cooperation through this historic conversion. Our ME-GI order book now stands at 140 orders – for different vessel sizes and applications, which we see as a compelling case for our technology to be designated the industry standard."

Nakilat Managing Director Eng. Abdullah Al-Sulaiti, said, "The success of the ME-GI project is the culmination of years of cooperation with Qatargas, RasGas and MAN Diesel & Turbo as turnkey project manager. In late 2013, Nakilat worked with our charterers to implement a pilot conversion on Q-Max Rasheeda, the first retrofit ME-GI project ever to be implemented in the marine industry. This is a milestone moment for all involved parties."

MAN Diesel & Turbo reports that the vessel's ME-GI units have displayed a seamless change between fuel-oil and gas operation – a key characteristic of the ME-GI technology.

The Qatar fleet comprises 14 Q-Max and 31 Q-Flex LNG carriers, all using dual MAN Diesel Turbo's S70-ME low-speed diesel engines for propulsion.


The ME-GI engine gives shipowners and operators the option of utilizing oil or gas fuel depending on relative price and availability, as well as environmental considerations.

The ME-GI uses high-pressure gas injection, allowing it to maintain the attributes of MAN B&W low speed engines that have made them the default choice of the maritime community.

The ME-GI is not affected by the derating, fuel-quality adjustment or methane-slip issues that have been seen with other dual-fuel solutions.

MAN Diesel & Turbo sees significant opportunities for gas-fueled tonnage as fuel prices rise and exhaust-emission limits tighten. Research indicates that the ME-GI engine delivers significant reductions in CO2, NOx and SOx emissions, with its negligible methane slip makes it the most environmentally friendly technology available.

An ME-LGI counterpart that uses LPG, methanol and other liquid gases is also available and has already been ordered.


OCTOBER 28, 2015 — MAN Diesel & Turbo reports that Nakilat, the shipping arm of Qatar’s liquefied natural gas (LNG) sector, has become the first ship operator to convert a vessel’s low speed marine diesel to use LNG as fuel.

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