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Experimental Investigation of CI Engine Operated on Biodiesel with SCR After-Treatment Technique

G G Deshpande

Abstract


Diesel engine emissions problem is the most common in now days. It causes an adverse effect on environments and human life. This has led to an exponential increase in the amount of exhaust gases in the environment. The major gases having maximum amount of harmful influence on the environment are unburned hydrocarbons, carbon monoxide, oxides of nitrogen, particulate matter etc. Various technologies have been developed to tackle these gases both in petrol and in diesel engines. Selective Catalytic Reduction is one such advanced emissions control technology used for reduction of emissions in diesel engines. The objective of this work is to investigate direct injection single cylinder CI engine operated on biodiesel with SCR after-treatment technique. For this investigation, we used Jatropha methyl ester biodiesel as an alternate fuel for diesel fuel which possesses low cetane number which is not sufficient to operate existing diesel engine. For this investigation, performance and emission by Taguchi and multiple regression analysis is used. The selected input parameters are fuel fraction, compression ratio, injection nozzle pressure, injection timing, urea flow rate and urea percentage. Outputs variables such as; Brake Thermal Efficiency (BTE), specific fuel consumption(SFC), content of HC particles, NOx and CO2 in the emission are measured and considered its influence on CI Engine performance. The test was carried out at full load condition and the optimized condition are found such as; 17.5:1 Compression Ratio, 230 bar Injection Pressure, 22° Injection Timing and 20% Fuel Fraction. The optimized condition gives better performance.


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References


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