Effect of Injection Pressure and Nozzle Geometry on the Performance and Emission Charcteristics of Diesel Engine Operated with Palm Oil Methyl Ester

Abstract

The experimental study has been massinly focused on effect of Injection Opening Pressure (IOP) and nozzle geometry operated on diesel fuel and blends of palm oil methyl ester (POME) fuel in diesel engine. The 3 holes nozzle geometry with 205 bar injection opening pressure (base line nozzle geometry) and 5 holes nozzle geometry with 240 bar injection pressure (modified nozzle geometry). The various blends like B20, B40, B60, B80, and B100 are prepared and experiments conducted on single cylinder 4 stroke diesel engine with keeping constant compression ratio and studied the performance and emission characteristics. The experimental results showed that higher Brake thermal efficiency (BTE) for baseline nozzle geometry up to B40 pome, but BTE for changed nozzle geometry improved up to B20 mix of POME blend. Also 32 % of reduction in oxides of element (NOX) was observed for modified nozzle geometry. However carbon monoxide and unburnt hydrocarbons (UBHC) emissions were slightly higher for modified nozzle geometry as compared to baseline nozzle geometry at full load condition.

Keywords: Nozzle geometry, Diesel Engine, Emission, Palm oil Methyl Ester.