MAN Energy Solutions Completes Type Approval Test for Upgraded Dual-Fuel GenSet

MAN Energy Solutions has successfully completed the Type Approval Test (TAT) for its upgraded MAN L35/44DF CD dual-fuel engine, confirming its suitability for auxiliary GenSet and electric propulsion applications. The tests, conducted from April 7 to 11 at STX Engine’s headquarters in Changwon, South Korea, were witnessed by six international classification societies.

The MAN L35/44DF CD is an advanced iteration of the L35/44DF CR engine, originally introduced in 2015. The new model includes several key enhancements, most notably the Adaptive Combustion Control (ACC) system, which continuously monitors combustion to optimise fuel injection in real time.

Designed for container vessels and LNG carriers, the 35/44DF CD engine operates at constant speeds of 720 and 750 rpm. It offers up to 16% more output than comparable engines in its class, while significantly reducing greenhouse gas emissions, including up to 85% less methane slip than standard benchmarks.

“We have worked closely with STX over the past three years in developing the MAN 35/44DF CD. We anticipate it having broad appeal, especially among container vessels and LNG carriers. In addition to its strong output, other advantages of the MAN 35/44DF CD include its effective reduction of methane slip and its future-fuel readiness for methanol and other fuel types,” said Alexander Knafl, Senior Vice President, MAN Energy Solutions.

Sephardim Koblenz, Vice President and Head of Licensing, Four-Stroke Marine & License at MAN Energy Solutions, added: “The 35/44DF CD is a future-proof concept with all the latest technology, including full connectivity and cyber security. The 35/44DF CD’s reliability, fuel efficiency, low methane-slip and cost optimisation are also crucial to the engine’s resumé.”

The test also included the methanol-ready 35/44CD variant, reinforcing MAN Energy Solutions’ strategy to offer engines adaptable to multiple fuel types. The engine’s development aims to reduce both capital expenditure (CAPEX) and operational costs (OPEX) for shipowners while ensuring compliance with evolving emissions regulations. The MAN 35/44DF CD builds on the performance legacy of the company’s 35/44DF CR and 32/44CR models, which have logged millions of operational hours. The new engine’s design also prioritises local manufacturing and ease of integration.

Tags: Dual fuel, Green Shipping, MAN energy Solutions, Maritime, South Korea, Technology
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