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Performance and emission characteristics of diesel engine run on biofuels based on experimental and semi analytical methods

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Author(s): Donepudi Jagadish, Puli Ravi Kumar, K. Madhu Murhty

Journal: International Journal of Energy and Environment
ISSN 2076-2895

Volume: 2;
Issue: 5;
Start page: 899;
Date: 2011;
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Keywords: Diesel engine emissions; Biofuels; Equivalence ratio; Particulate matter

ABSTRACT
Performance and emissions from a constant speed single cylinder diesel engine was observed with different kinds of fuels blends like diesel-ethanol, and diesel-palm stearin methyl ester. The engine setup was modified to operate in different modes like naturally aspirated condition, supercharged condition and with exhaust gas recirculation (EGR). The air fuel ratio was predicted from exhaust emission data using correlations and the particulate matter (PM) was estimated from smoke data. Fuel air equivalence ratio values of the engine at different operating conditions have been compared. Engine is operated with higher fuel air equivalence ratios with EGR. Particulate matter emissions were considerably reduced with ethanol-diesel, biodiesel-diesel blends in comparison to pure diesel. With EGR rate the particulate matter emissions are increased. An EGR rate of 10% will be best for the present engine which can give better trade-off among HC, NOx and PM.
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