Experimental investigation on performance combustion and emission characteristics of a DI diesel engine fueled with punnai oil

Abstract

The world energy production mainly depends on diesel derived from fossil fuel The growing concerns about environmental impacts future availability and costs of fossil fuels have resulted in the intensive research on alternative renewable energy sources These energy sources must be economically feasible and sustainable for large-scale adoption while being able to meet the energy demands of the increasing global population Biodiesel is such a promising alternative oxygenated fuel as it has properties similar to those of the diesel fuel and renewable in nature due to its biomass origin It can reduce exhaust emissions when used as fuel in a compression ignition engine In the present investigation an analysis of the performance emission and combustion of a diesel engine with punnai oil as fuel using different methods such as blending neat punnai oil with diesel blending biodiesel derived from punnai oil with diesel Diestrol Ethanol biodiesel diesel blending and engine modifications like thermal barrier coated low heat rejection engine and exhaust gas recirculation have been analyzed In the first stage of the work different blends of punnai oil and diesel were prepared in different proportions on a volume basis namely P10 90 Diesel 10 Punnai oil P15 85 Diesel 15 Punnai oil P20 80 Diesel 20 Punnai oil and P100 Neat Punnai oil and analyzed The brake thermal efficiency of diesel at full load was found to be 292 whereas it was lower for neat punnai oil and its blends NOx emission from Punnai oil blends showed a decreasing trend whereas higher smoke emissions were recorded Combustion parameters such as in-cylinder pressure and heat release rate are lower for punnai oil and its blends However the P10 blend performs closer to that of diesel fuel in terms of efficiency and emissions newline