Cat performs first in hull retrofit of dual fuel engine

02 Dec 2014
The M 46 DF from MaK is designed to be suitable for retrofit to existing M 43 C powered ships

The M 46 DF from MaK is designed to be suitable for retrofit to existing M 43 C powered ships

Hamburg, Germany based Caterpillar Marine reports that it has completed the first in-hull retrofit of a dual fuel marine engine.

The company says that, working with dealer Bolier, it carried out the engine modifications on the Anthony Veder LNG carrier Coral Anthelia in under six weeks.

The conversion job replaced the existing MaK M 43 C diesel with a 6-cylinder M 46 DF dual fuel unit, with neither docking nor modifications to the ship’s structure required. According to Caterpillar, the 460mm bore, 910mm stroke M 46 DF, rated at 900kW per cylinder, was engineered to allow strategic retrofitting to M 43 C equipped ships, in a similar fashion to retrofitting the smaller M 32 C with the M 34 DF equivalent. In either case, the conversion can be carried out, says Cat customer service manager Axel Hausmann, without having to move the engine block or perform extensive machining. “The benefits of an in hull retrofit for our customers are incredibly significant,” he said. “In addition to preserving the integrity of the vessel, an in hull retrofit saves the customer time and money in an industry driven by the bottom line.”

“Caterpillar is firmly committed to providing sustainable, flexible solutions that enhance our customers’ operations. We’re proud of the collaborative effort between Anthony Veder, Cat dealer Bolier and our engineering team to successfully achieve a beneficial industry milestone,” said Karl Vollrath, another customer service manager. “As an LNG carrier operating in waters impacted by SECA regulations, the Coral Anthelia will be able to optimise its performance utilising LNG, heavy fuel oil or diesel.”

The M 46 dual fuel engine is said to be suitable for both mechanical and electric propulsion systems. It is designed for unlimited operation on LNG, marine diesel oil and heavy fuel oil, and is claimed to reach industry-leading efficiency in gas mode.

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