First two-stroke EGR system runs in Korea

26 Oct 2012
Side profile of the engine with EGR

Side profile of the engine with EGR

MAN Diesel & Turbo says that the first IMO Tier III-compliant low speed diesel engine to use EGR has been unveiled at licensee HHI-EMD (Hyundai Heavy Industries Engine & Machinery Division) in Ulsan, South Korea.

The MAN B&W 6S80ME-C9 with integrated exhaust gas recirculation (EGR) system has been designed to meet Tier III NOx regulations, being introduced in ECAs (Emission Controlled Areas) from 2016, without significantly compromising engine performance.

MAN Diesel & Turbo’s Søren H. Jensen, vice president and head of research and development, marine low-speed, said: “Testing achieved a low penalty, equivalent to 1-3g/kWh, which is even better than our most optimistic expectations. As a promising spin-off benefit, the engine can also run in a fuel-optimised Tier II mode that facilitates an approximate 4 g/kWh fuel-oil consumption reduction at part-load.”

The engine will be installed in a Maersk Line C-class container vessel, currently under construction at Hyundai’s shipyard, and due for delivery in the first quarter of 2013. A.P. Moller–Maersk and MAN have agreed to operate the engine 20% of the time in IMO Tier III mode, and the fest of the time in fuel-optimised Tier II mode with low EGR rate, sequential turbocharging and turbocharger cut-out. Performance will be closely monitored over the next three years in order to gain service experience and increase the EGR system’s reliability for future engines.

The EGR system was designed, produced and assembled in cooperation with HHI-EMD, Alfa Laval, Siemens, GEA and Vestas Aircoil. This close collaboration has resulted in a reliable prototype engine configuration that MAN Diesel & Turbo states will form the basis for its future low-speed diesel programme.

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