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Experimental Investigation on Four Stroke Ceramic Heater Hot Surface Ignition C.I. Engine using Ethanol-Diesel Blends

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Author(s): Rama Udaya Marthandan R

Journal: Journal of Current Engineering Research
ISSN 2250-2637

Volume: 2;
Issue: 4;
Date: 2012;
Original page

Keywords: ethanol | ceramic heater | additive | combustion chamber | hot surface ignition

ABSTRACT
Many alternate fuels are being considered for automotive vehicles. Ethanol is one of the alcohol that seem most promising. Ethanol is an attractive alternative fuel from both natural and manufactured sources, because it is a renewable bio-based resource and it is oxygenated, thereby providing the potential to reduce particulate emissions in hot surface ignition C.I engines. Ethanol is produced from molasses, which is a by-product of sugarcane. Ethanol can be produced in large quantities at low cost from these molasses. The prime objective of present work is to find out suitable ethanol-diesel blends. Because of renewable nature, the ethanol is found to be more considerable for the use in hot surface ignition diesel engine. Ethanol is inflammable and its vapour form explosive mixtures with air and an excellent solvent for fuels . Isoamylnitrate additive is used to solubility of ethanol in diesel, that acts as a bridging agent through molecular compatibility and bonding to produce a blend, also used to satisfy the mixture homogeneity and prevent phase separation. Additive is used to increase their cetane number sufficiently with ignition improving to ensure that compression ignition will occur, and save the expense and complexity of engine components changes. The experimental investigations are carried out on four stroke single cylinder stabilized zirconia ceramic heater hot surface ignition diesel engine to evaluate the engine performance characteristics of brake specific fuel consumption, brake thermal efficiency and indicated thermal efficiency under steady state operating conditions at the specified speed of 1000rpm. The present work is investigate on ethanol-diesel blends with and without additive for their suitability of hot surface ignition four stroke single cylinder C.I engine on cylindrical type combustion chamber in varies ratios of ethanol-diesel blends. The blends are 100%diesel, 85%diesel with 10%ethanol and 5%additive, 75%diesel with 20%ethanol and 5%additive, 55%diesel with 40%ethanol and 5%additive, 35%diesel with 60%ethanol and 5%additive, 100%ethanol, 90%diesel and 10%ethanol, 80%diesel and 20%ethanol, 60%diesel and 40%ethanol, 40%diesel and 60%ethanol and 90%diesel and 10%ethanol. The fuel consumptions of the engine fuelled by diesel were higher, compared with those fuelled by pure ethanol. The differences were from 10.2% to 31.5% at different engine loads. When fueled with pure ethanol given 26.7% out put at 4.5 kw and 26.8% at 3.5 kw engine load. The stabilized zirconia ceramic heater is used to reduce the CO, HC, NOx and smoke emissions and improve engine output behaviors. The reduction of CO emissions from the blended fuels were from 2% to 16.1% at 10% ethanol blends, NOx emissions from 200.36 ppm to 1547.29 ppm and the maximum reduction of smoke was observed at 43.5%. Surface ignition method of using 100% ethanol in diesel engines and the temperature of the air-fuel mixture adjacent to a hot surface exceeds its self-ignition limit.
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