Experimental and exergy analysis of a hydrogen-assisted compression ignition engine powered by jatropha and pine oil blends

This article intends to analyse the characteristics of compression ignition (CI) engines operating on jatropha oil (J100) and an equally mixed jatropha and pine oil (JP50) with the addition of hydrogen at a rate of 6 to 8 LPM (litres per minute). The 4-stroke computerised CI engine is used for the experiment, and the load is varied between 25% and 100%. When the engine runs with J100 and JP50, the air intake systems premix the hydrogen and designate it as J100H6, J100H8, J100H10, JP50H6, JP50H8, and JP50H10. JP50H10 shows a higher thermal efficiency of 35.35%, and BSNO of 14.89 g/kWh, and registers a lower BSCO of 11.25 g/kWh, BSHC of 0.22 g/kWh, BSCO2 of 754.62 g/kWh and smoke of 53.6%.Using hydrogen at 10 LPM with JP50 dominates combustion by generating a maximum peak in-cylinder peak pressure of 73.32 bar, a peak rate of pressure increase of 5.98 bar/°CA, and a peak heat release rate of 63.40 J/°CA at full load. Provisions of hydrogen at 10 LPM with Jatropha pine oil mix has reduced the FE to 15.59 kW, increased the cooling water and exhaust availability by 39.30% and 14.57%, and increased the exergy efficiency and SI index by 14.91% and 14.32%, respectively. JP50H10 shows the setback of 62.5 % higher BSNO emissions compared to diesel. Therefore, it is essential to reduce BSNO with the help of chemical catalytic reduction system.