To convert its vessel Coral Anthelia to dual fuel operation, Anthony Veder worked with Cat dealer Bolier to complete the industry’s first in-hull retrofit
The conversion took place aboard the Coral Anthelia, a carrier vessel that transports ethylene and liquid natural gas (LNG) primarily in northwestern Europe. Today, the Coral Anthelia’s M 46 DF engine can run on LNG, marine diesel oil and heavy fuel oil—reaching industry-leading efficiency in gas mode. Using LNG eliminates the emission of sulfur and particulate matter and reduces emissions of NOx and CO2 by 90% and 20%, respectively.
“LNG as a cargo creates a natural boil-off gas,” says Frans Juhrend, customer support project engineer at Bolier. “Anthony Veder wanted to find a solution to consume this gas and not release it into the environment. They decided to adapt the engine in order to consume the boil-off gas—hence the conversion to run on gas as fuel.”
Anthony Veder wanted to install a dual fuel engine at the time of the ship’s construction, but the technology was not quite ready. When it did become available, the company conducted an R&D project to compare in-hull and outside-the-hull retrofits, with the in-hull process emerging as the clear winner.
Converting the Coral Anthelia’s MaKTM M 43 C diesel engine to a six-cylinder M 46 DF (dual fuel) platform, with each cylinder offering 900 kW of rated power, required careful planning and collaboration between Anthony Veder and its partners.
“The deadline was fixed, because commercial operation of the vessel in her new trade was set,” Juhrend says. “Meeting the timeframe was only possible due to a very efficient preparation phase.”
Key steps in that phase included pre-determining all the transport openings through which required components could be transferred, as well as laying out 90% of all necessary cabling on board the vessel before arrival at the shipyard. That allowed the conversion team to begin disassembling, then rebuilding, the engine immediately.
Source: Caterpillar Marine
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