PERFORMANCE AND EMISSION CHARACTERISTICS OF A CRDI ENGINE FUELLED WITH DIESEL-LINSEED BIODIESEL USING EGR TECHNIQUE

Abstract

The shrinking petroleum sources and ecological issues have contributed to a demand for more environmentally sustainable and renewable fuels. Due to its biodegradability, high cetane number, low sulphur content, aromatic compound and low volatility, biodiesel received from different renewable sources has been regarded as suitable alternative fuels. Biodiesel extracted from non edible biomass feedstock such as linseed oil are noticed to be achievable choices for developing nations such as India where utilization and cost of edible oil is very high. In past few years biodiesel is rising as an alternative fuel that is a good substitute for neat diesel fuels. Biodiesel is primarily derived from fats and oils by multiple methodologies such as dilution, pyrolysis, micro- emulsification and transesterification, but these days, transesterification is the most commercial technique used for production of biodiesel. The aim of present work is to preparation of linseed biodiesel and study of the impact of performance and emissions of linseed methyl ester on CRDI VCR engine with EGR having single-cylinder, 4- strokes, water cooled operated at a constant speed of 1500rpm. A water-cooled eddy current dynamometer is connecting with the engine to measure the load on the engine. The engine was adjusted at 23o CA bTDC fuel inject timing (suggested by the manufacturer) and 18:1 compression ratio. The several performance and emission characteristics like brake power (BP), brake specific fuel consumption (BSFC), brake thermal efficiency (BTE), mechanical efficiency, brake mean effective pressure (BMEP), carbon dioxide (CO2) emission, unburned hydrocarbon emission (UHC), NOx emissions, and smoke opacity were analysed on a 4 stokes single cylinder with 18:1 compression ratio operated at constant speed 1500rpm of CRDI VCR engine. The test results of LB10 and LB20 were compared with diesel with or without EGR. It was observed that CO and UHC emission was increased with blend content while brake thermal efficiency decreased with blend concentration. NOx emission was marginally reduced by the use of EGR.