MAN Diesel & Turbo has received an order for four MAN B&W 5G70ME-GI engines in connection with Daewoo Shipbuilding & Marine Engineering Co., Ltd. (DSME) agreeing a deal with the BW Group to build two LNG carriers.
The technical engine specification complies with IMO Tier II, with options to include remedies for Tier III compliance at a later stage.
The 173,400 m3 vessels are scheduled for delivery in late 2017/early 2018 and will be built at DSME’s Okpo shipyard in Geoje, Korea.
The deal represents the second LNG ME-GI contract for DSME after a previous order signed in 2012.
Compliance with IMO Tier III regulations basically requires an 80% reduction in NOx emissions – compared to Tier I – within the designated emission control areas (ECAs) over a defined test cycle.
MAN Diesel & Turbo has developed two main approaches to comply with these challenges: Selective Catalytic Reduction (SCR), which involves the catalytically accelerated reaction of nitrogen oxides with ammonia to form water and nitrogen, and Exhaust Gas Recirculation (EGR), which works by recirculating a portion of an engine’s exhaust gas back to the engine cylinders.