MARCH 11, 2016 — Japan's JFE Engineering Corporation has entered a new cooperation agreement with MAN Diesel & Turbo. It covers the manufacture of MAN 32/44CR, 35/44DF, 48/60CR and 51/60DF four-stroke engines for marine newbuild projects for ships built in Japanese shipyards for Japanese owners for deployment on Japanese domestic trade routes.
JFE has produced and supplied medium-speed diesel engines since 1964 under a license from SEMT Pielstick, which was acquired by the MAN Group back in 2006.
The MAN Diesel & Turbo common-rail engines to be built under the new agreement cover a power range of 3,600 to 21,600 kW.
Their well-proven, state-of-the-art, fully electronically-controlled, common-rail injection system is suitable for both heavy fuel oil and distillate fuels. The technology, developed in-house by MAN Diesel & Turbo and fully optimized for its engines, provides superior performance in terms of fuel consumption and smoke emissions, especially at part load, compared to IMO Tier II versions of the same engines with a conventional injection system.
On customer request, the common-rail engines can be provided with ECOMAP capability: this permits the engine to be programmed to follow different SFOC/power characteristics, each having an optimal efficiency at different load points. This gives the customer the potential to achieve better fuel economy through changing the engine's operating profiles. In vessels with multi-engine installations in particular, the combination of such CR engines with an intelligent power management system enables the maximal exploitation of the engines' flexibility potential.
The dual-fuel engines, covering the power range of 3,180 to 18,000 kW, can be operated on LNG in the Otto (gas mode) cycle or on more traditional HFO, MDO or MGO in Diesel (diesel mode) cycle. The dual-fuel engines can switch between these fuels at any engine load between 15% to 100% maximum continuous rating (MCR) without disruption to the power supply. Extremely environmentally friendly operation is achieved in gas mode when using LNG as fuel with negligible sulfur (SOx) and particle emissions, while carbon dioxide (CO2) and nitrogen oxide (NOx) emissions are respectively reduced by 20 and 85% compared to diesel mode. Accordingly, running the engines in gas mode complies with the IMO Tier III emissions limits without the need for any exhaust-gas after-treatment.