Research On Oxygen-enriched Combustion Based On Membrance Technology Of Ships Diesel Engine

With the increasing concerns about energy and environmental pollution, reducement of the engine energy consumption and emissions causes more and more scholars’attention. Oxygen-enriched combustion of engine can not only reduce emission of PM obviously, but also improve the thermal efficiency of combustion and increase engine power density. Active exploration is conducted on oxygen-enriched combustion based on membrance technology for oxygen-enrichment in diesel engines by both domestic and foreign researchers. In this article, research on Oxygen-enriched Combustion and Membrance Technology of Diesel Engine in Ships is carried by both ship experiments and simulation.Firstly, it introduces the theory of membrance technology for oxygen-enrichment and Oxygen-enriched combustion.Secondly, the combustion in cylinder of diesel6L20/27was simulated by using GT-power. Research on energy power, consumption and emissions was conducted and the best percentage of oxygen was designated on the basis of the research. The results show that diesel6L20/27’s performance is better when the percentage of oxygen was23%.Finally, on the basis of the theory and simulation above, experimental system was built on a ship. Research on combustion process, energy power, consumption and emissions of ships was conducted by mooring testing and sailing testing. The results show that as percentage of oxygen changed from21%to23%, conbustion lagging period is shortened, speed of combustion is fastened, thermal efficiency is improved, circulation power is increased, effective power is increased, fuel consumption is reduced, emission of PM, CO and HC is reduced obviously, but NOx is increased obviously.