Thermodynamic analysis of compression ignition engine using neat Karanja oil under varying compression ratio

Exergy analysis method has been widely used to evaluate the energy utilisation efficiency and potential of waste heat energy. The objective of the present investigation is to analyse the exergy efficiency, destruction of exergy, mean gas temperature, exhaust temperature, brake thermal efficiency and brake-specific fuel consumption of a single cylinder diesel engine using diesel and neat Karanja oil blends at different compression ratios (CRs) at full load and at different loads with a CR of 18. It is observed that 10% neat Karanja oil blend (K10) shows similar performance to diesel and better than 20% neat Karanja oil blend (K20). But K20 shows better performance at a CR of 18 as compared to 16. At higher loads, exergy efficiency and destruction of exergy are found more at a CR of 18 for all fuels. Destruction of exergy decreases and exergy efficiency increases at CR 18.