Lean hydrous and anhydrous bioethanol combustion in spark ignition engine at idle. (15th November 2016)

• Record Type: Journal Article
• Authors: Chuepeng, Sathaporn; Srisuwan, Sudecha; Tongroon, Manida
• Is Part Of: Energy conversion and management. Volume 128(2016)
• Page Start: 1
• Page End: 11
• Publication Date: 2016-11-15
• Subjects: Bioethanol -- Combustion -- Emission -- Idle -- Spark ignition engine; Direct energy conversion -- Periodicals; Energy storage -- Periodicals; Energy transfer -- Periodicals; Énergie -- Conversion directe -- Périodiques; Direct energy conversion; Periodicals; 621.3105
• DOI: 10.1016/j.enconman.2016.09.059
• Languages: English
• ISSNs: 0196-8904

Abstract

Highlights: Anhydrous ethanol burns fastest in uncalibrated engine at equal equivalence ratio. The leaner hydrous ethanol combustion tends to elevate the COV in imep. Hydrous ethanol consumption was 10% greater than anhydrous ethanol at ϕ = 0.67 limit. Optimizing alternative fuel engine at idle for stability and emission is suggested. Abstract: The applications of anhydrous bioethanol to substitute or replace gasoline fuel have shown to attain benefits in terms of engine thermal efficiency, power output and exhaust emissions from spark ignition engines. A hydrous bioethanol has also been gained more attention due to its energy and cost effectiveness. The main aim of this work is to minimize fuel quantity injected to the intake ports of a four-cylinder engine under idle condition. The engine running with hydrous ethanol undergoes within lean-burn condition as its combustion stability is analyzed using an engine indicating system. Coefficient of variation in indicated mean effective pressure is an indicator for combustion stability with hydrocarbon and carbon monoxide emission monitoring as a supplement. Anhydrous ethanol burns faster than hydrous ethanol and gasoline in the uncalibrated engine at the same fuel-to-air equivalence ratio under idle condition. The leaner hydrous ethanol combustion tends to elevate the coefficient of variation in indicated mean effective pressure. The experimental results have found that the engine consumes greater hydrous ethanol by 10% on mass basis compared with those of anhydrous ethanol at the lean limit of fuel-to-air equivalence ratio of 0.67. The results of exhaust gas analysis were compared with those predicted by chemical equilibrium analysis of the fuel-air combustion; the resemble trends were found. Calibrating the alternative fueled engine for fuel injection quantity should be accomplished at idle with combustion stability and emissions optimization.