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Influence of Water-in-Diesel Emulsion Fuel and Compression Ratio on Combustion, Performance and Emission Characteristics of Diesel Engine

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The emission characteristics of diesel engine have drawn much interest in the study of eco-friendly fuels since enhanced environmental and human health are of concern. To improve the emission qualities, researchers endeavor to create changes in existing diesel fuel and engine operating conditions. The current study focuses the modifi cation of existing diesel fuel in the form of water-in-diesel emulsion and analyzes its effect on combustion, performance and emission characteristics in a diesel engine with different CRs. The experiments are conducted in two phases. In the fi rst phase, various concentration of W/D emulsion fuels (5%, 10%, 15% and 20%) are prepared at a high speed of agitation, stabilized by a non-ionic surfactant, and its properties are measured. The results revealed that the concentration of water in excess of 10% in diesel failed to meet the standard diesel fuel requirements. In the second phase, the combustion, performance and emission characteristics of BD and W/D emulsion fuels (5% and 10%) are studied under different loading conditions (25%, 50%, 75% and full load) with CR of 15 and 18. The results showed that ICP and NHR are increased and MGT is decreased with increase in water concentration. In addition, marginal increases in IDP is observed for W/D emulsion fuels at a CR 18, whereas signifi cant increases is observed with CR 15. The diesel engine performance and emission parameters such as BSFC, BTE and NO emission showed good improvement with W/D emulsion fuels for both CRs, irrespective of load conditions. In addition, marginal increase in HC and CO emissions are observed with high CR, and considerable increases are noted at low CR.
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Document Type: Research Article

Publication date: 01 February 2016

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