Posted on January 10, 2024
Nippon Yusen Kaisha (NYK), the major Japanese shipping company and among the world’s largest owners and operators of LNG carriers, has ordered 4 × 2 × 5G70ME-GA Mk. 10.5 engines in connection with the construction of 4 × 174,000 cbm. LNG carriers. All eight engines will feature MAN Energy Solutions’ proprietary EGRBP (Exhaust Gas Recirculation ByPass) emissions-reduction technology, according to the company’s release.
The MAN B&W ME-GA engine delivers a low CAPEX solution aimed at LNG carriers that are able to use ‘boil-off’ gas as a source of fuel.
Based on the well-proven MAN B&W dual-fuel design with minimal installation requirements, the MAN B&W ME-GA uses an efficient ignition concept and unique gas-admission system that delivers safe and reliable operation.
The ME-GA furthermore features minimal operational costs, simple supply and purging concepts, and low maintenance costs for its fuel-gas supply system. It joins the well-established ME-GI Diesel-cycle engine in MAN Energy Solutions’ two-stroke-engine portfolio, which now offers both low- and high-pressure, dual-fuel solutions for operation on LNG.
MAN Energy Solutions’ EGR reduces methane-slip emissions compared to first-generation, Otto-cycle engines without EGR.
EGR enables the significant reduction of methane slip, while simultaneously improving fuel efficiency in both gas and fuel-oil operation. Ultimately, EGR actively reduces emissions and improves efficiency in both Tier II and Tier III.
MAN Energy Solutions’ proprietary EGR system began development more than a decade ago and was applied to a commercial project for the first time in 2013. Initially focused on achieving NOx Tier III compliance, the system has since matured into a robust, engine-tuning tool that today has accumulated orders for more than 278 engines.
