Two Suezmax tankers for Ditas Shipping will be powered by MAN B&W 6G70ME-C.9 two-stroke main-engines that feature Exhaust Gas Recirculation (EGR) systems.
The newbuildings will be the first vessels, after January 2016, to be officially certified as complying with the Tier III emission restrictions within existing North American NOx Emission Control Areas (NECAs) and the United States Caribbean Sea NECA.
ERG is a NOx emissions control-technology that recirculates a portion of the engine’s exhaust gas back to the engine cylinders.
MAN Diesel and Turbo’s system operates by the exhaust gas being drawn through a scrubber, cooler and water mist catcher by a specifically designed blower.
It is then mixed with the charge air via a unique air pipe before entering the main-engine coolers. Within the scrubber the exhaust gas is washed with water and the scrubber washes out particulate matter.
MAN Diesel and Turbo previously designed the first EGR system for a two-stroke marine diesel engine for operation on a container vessel in 2010.
