Diesel And Bio-Diesel Fuel Deposits On A Hot Wall Surface

摘要: Deposit formation in the combustion chamber of an engine is a complex phenomenon that causes various problems such as reduced engine performance, increased emissions and damage for diesel engines. The utilization bio-diesel fuel further increases tendencies deposit formation due to its higher viscosity distillation temperature compared fuel. The aim this study clarify deposition an engine using simplified method which referred hot surface deposition test (HSDT). HSDT also used simulate investigate deposit formations fuels on wall combustion chamber instead test (EDT). EDT showed both have similar deposit development soot fraction in deposits. considered initial research step developing a simplified investigation it capable of differentiating among types fuels. The deposit. depended droplet impingement interval, temperature, fuel, properties, stage of deposition, overlapping conditions competition phenomena during deposit formation, cooling effect, heat transfer effect chemical reaction effect. These factors determine existence wet amount deposits accumulated. Different temperatures showed different droplet-surface interactions, evaporation lifetimes wetldry where deposit development features resulted. Palm oil methyl ester (PME) refer as 100% palm based bid-diesel (B100) blends (B50, B20 and B5) produced rate deposits compared fbel (DF). Less DF was obtained absence bio-diesel fuel components, non-overlapping dry conditions. Philippine National Standard (DFP) having 1% coconut (CME) in composition, greater DF, which resulted relatively large DFP. However, bio-diesel fuels, 100% oil methyl (B100C) slower development rate B100, although were changed. Due the , lower value maximum point (MEP) shorter lifetime before MEP, BlOOC had potential reducing B 100.