OCTOBER 31, 2012 — MAN Diesel & Turbo has unveiled the first IMO Tier III-compliant diesel engine utilizing EGR (Exhaust Gas Recirculation). The presentation took place at a ceremony at the Ulsan, Soutk Korea, production facilities of HHI-EMD, the engine and machinery division of Hyundai Heavy Industries, where a group representing shipyard and ship owners, was invited to an informal presentation of the new engine type – an MAN B&W 6S80ME-C9 with integrated EGR.
Implementation of the EGR system is a milestone development that enables the engine to meet IMO Tier III NOx regulations that will be introduced in ECAs (Emission Controlled Areas) from 2016. It enables the emissions limit to be met without significantly compromising engine performance.
MAN Diesel & Turbo's Søren H. Jensen, Vice President and Head of Research & Development, Marine Low-Speed, said: "Testing achieved a low penalty, equivalent to 1-3g/kWh, which is even better than our most optimistic expectations."
The EGR system was designed, produced and assembled in a cooperation with HHI-EMD, Alfa Laval, Siemens, GEA and Vestas Aircoil that has resulted in a reliable prototype engine configuration that MAN Diesel & Turbo says will form the basis for its future low-speed diesel program.
"As a promising spin-off benefit," says Mr. Søren Jensen, "the engine can also run in a fuel-optimized Tier II mode that facilitates an approximate 4 g/kWh fuel-oil consumption reduction at part-load."
MAN Diesel & Turbo says that this makes the engine even more efficient than today's high efficiency Tier II engines during transoceanic operation. This favorable result was accomplished through a combination of sequential turbocharging, turbocharger cut-out and low EGR rates.
The engine will be installed in a Maersk Line C-class container vessel, currently under construction at Hyundai's shipyard. The ship is due for delivery in the first quarter of 2013 and is bound for service between South East Asia and West Africa. The A.P. Moller – Maersk Group and MAN Diesel & Turbo have agreed to operate the engine 20 percent of the time in IMO Tier III mode, and to otherwise operate onthe fuel-optimized Tier II mode with low EGR rate.
MAN Diesel & Turbo intends to follow the engine's performance closely over the next three years in order to gain service experience and increase the EGR system's reliability for future engines.