MAN high-speed marine engine 100% biofuel ready

By Becky Schultz25 April 2023

MAN Energy Solutions announced its MAN 175D engine is now formally approved for operation on biofuels, effective immediately. This includes use of all standard biofuels, including hydrotreated vegetable oil (HVO) and fatty acid methyl ester (FAME) fuels up to a content of 100%, with no technical adjustments to the engine required.

MAN 175D marine engine The MAN 175D high-speed engine is approved to operate on 100% biofuels. (Photo: MAN Energy Solutions)

“MAN Energy Solutions prepares its engines for operation on future and sustainable fuels and the MAN 175D is no exception,” said Florian Keller, head of high-speed sales for the company. He noted that several of the engines have been successfully running on up to B30 biofuel in commercial and governmental applications for several years without suffering any loss in performance.

“Due to its state-of-the-art design, just a few engine components are subject to slightly higher wear, depending on the amount of biofuel and the duration of operation,” Florian acknowledged. “For uninterrupted engine operation, only minor adaptations of the fuel treatment system are necessary.”

To ensure the engine’s Maximum Continuous Rating (MCR) does not drop due to the lower energy content of FAME fuels, MAN Energy Solutions said it has developed a solution that allows the correction of the load by means of a Fuel Adaption Control, ensuring full MCR power even when operating at 100% FAME fuel content.

The MAN 175D is available in three variants with 12, 16 and 20 cylinders with 175 mm bore, and with an output from 1500 to 4400 kW (2012 to 5900 hp) at 1500 to 2000 rpm. It is optimized for propelling ferries, offshore supply vessels, tugboats and other working vessels, with specialist versions also available for market areas such as super yachts and naval marine applications. The eco-friendly engine is designed to comply with the latest, as well as future, emissions requirements and utilizes a very compact and flexible SCR system that enables vessel designers to optimize space onboard, the company noted.

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