Experimental investigation of HPHX aspect ratio on engine behaviour using preheated pongamia oil and higher blends of pongamia methyl ester

Abstract

Biodiesel is the widely accepted alternative fuel, in spite of lower calorific value and higher viscosity related issues than diesel fuel for a long- term usage. In biofuels, the country has a ray of hope in providing energy security. The proper fuel modification is of great importance. The preheating is remarkable, amongst the choices for reducing viscosity issues. Many researchers attempted and found B20 is ultimate but by preheating with appropriate heat exchanger designs, the B100 can also be used and replace the diesel usage. The focus of this research is thus to investigate the inhibiting factors of the HPHXs, the WHR and preheating device. The pongamia biodiesel is the most suitable as diesel replacement with fuel treatment device, the acetone charged HPHX of larger diameter and evaporator length (smaller aspect ratio and section ratio) shows improved performance and emissions. Further, the pongamia oil after preheat reaches a maximum viscosity of 15 cSt which is still higher to use in IC engine. Even though pongamia oil offer benefits of emission over POME blends, but are not advisable as diesel replacement.