Experimental evaluation of linseed oil biodiesel/diesel fuel blends on combustion, performance and emission characteristics in a DI diesel engine

This paper focuses on the influences of linseed oil biodiesel-diesel fuel blends in view of combustion, engine performance and emission characteristics at various engine loads in a DI diesel engine. Hence, the test engine was operated with diesel and linseed oil biodiesel-diesel fuel mixtures (D100, L10, L20, L30) at 2200 rpm and different engine loads including 3.75, 7.5, 11.25, 15 Nm and full load. The highest in-cylinder pressure was obtained with L10 except for 3.75 Nm and full load condition. Indicated thermal efficiency (ITE) decreased by 7.29% with L10 according to D100 while specific fuel consumption (SFC) increased 3.78% with L10 according to D100 at 11.25 Nm. SFC was determined as 0.264 kg/kWh, 0.274 kg/kWh, 0.304 kg/kWh and 0.318 kg/kWh wih D100, L10, L20 and L30 at 11.25 Nm. ITE was computed as 32.9%, 30.5%, 28.7% and 26% with D100, L10, L20 and L30 at 11.25 Nm respectively. CA50 was determined as 31.68 degrees CA, 32.04 degrees CA and 33.76 degrees CA with L30, L20 and L10 respectively at 11.25 Nm. Test results showed that CO decreased by about 36.2% with L30 according to D100. Conversely, 12.7% increase was seen on NOx with L30 compared to D100 at full load.