Experimental investigation on Preheating of Azadirachta indica biofuel and their performance analysis in a CI engine

Abstract

This paper deals with evaluation of engine performance using preheated biofuel utilizing the waste heat generated from exhaust gases. The performance characteristics and emission parameters are compared with the trans-esterified biodiesel. It is understood that the preheated biofuel run in the engine was capable of producing appreciable brake thermal efficiency as that of biodiesel run CI engine. This effort simultaneously reduced the heat loss to the environment, thereby improving the exergy of the system. The neem biofuel was heated to 70°C and 80°C before injection by the exhaust gases. HC and CO emissions were reduced by 22.3% and 19.01% respectively. NOx emissions suffered an increase of 18.6%. The improvement in BTE was 5.5% compared to non-heated biofuel.

Effect of Fuel Preheating on Engine Characteristics of Waste Animal Fat-Oil Biodiesel in Compression Ignition Engine

“…In addition, engine performance of raw Azadirachta indica biofuel (neem oil), preheated at 80 • C using heat from the exhaust gas, reported higher brake thermal efficiency (BTE) (by 5.5%) and reduced carbon monoxide (CO) (by 19.01%) and hydrocarbon (HC) (by 22.3%) emissions in the event of complete combustion due to their higher degree of fuel atomization and vaporization. In addition, this study recorded reduced exhaust gas temperature (EGT) (~370 • C), owing to reduced viscosity; however, they reported higher NOx emissions (by 18.6%) in view of increased adiabatic flame temperatures [27].…”