Two-stroke DF engine promises 50% reduction in methane slip

摘要

In an effort to mitigate methane slip and further reduce fuel consumption, Winterthur Gas & Diesel Ltd (WinGD) has unveiled a new exhaust recycling technology in its second generation of X-DF dual fuel engines. Introduced as part of X-DF2.0, WinGD's second-generation dual-fuel engine platform, Intelligent Control by Exhaust Recycling (iCER) delivers enhanced combustion control by using inert gas. Addressing methane slip is critical, as critics of LNG say any environmental benefits of the fuel quickly evaporate when methane escapes into the atmosphere. Methane has a global warming potential 28 to 34 times that of CO_2 according to the Intergovernmental Panel on Climate Change (IPCC) Assessment Report 5. During a virtual press conference, WinGD executives reported that incorporating iCER technology will result in a 50% reduction in methane slip emissions when using LNG and a significant reduction in fuel consumption - 3% in gas mode and 5% in diesel mode. The iCER technology captures the unburnt fuel (methane) before it is ejected through the exhaust, providing the engine a second chance to combust it. As a result, WinGD is confident its X-DF 2.0 engines will have methane slip levels of about 1.0-1.2 g/ kwh, as compared to 2.0-2.5 g/kWh in its first-generation engines.