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Investigating the Effects of eichhornia crassipes biodiesel and Liquefied Petroleum Gas on the Performance and Emissions of a Dual-Fuel Engine

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Fluid Dynamics & Materials Processing 2023年第9期19卷 2329-2343页

作者： Hawraa S.Mohammed Mahmoud A.Mashkour Mechanical Engineering Department University of Technology-IraqBagdadIraq

This study considers the effect of eichhornia crassipes biodiesel(ECB)blends on the performances,combustion,and emission characteristics of a direct injection compression ignition engine operated in a dual-fuel mode(DFM)and equipped with an Exhaust gas recirculation technique(EGR).In particular,a single-cylinder,four-stroke,water-cooled diesel engine was utilized and four modes of fuel operation were considered:mode I,the engine operated with an ordinary diesel fuel;mode II,the engine operated with the addition of 2.4 L/min of lique-ﬁed petroleum gas(LPG)and 20%EGR;mode III,20%ECB with 2.4 L/min LPG and 20%EGR;mode IV,40%ECB with 2.4 L/min LPG and 20%*** operation conditions were constant engine speed(1500 rpm),var-iation of load(25%,50%,75%,and 100%),full load,with a compression ratio of 18,and a time injection of 23°BTDC(Before top died center).With regard to engine emissions,carbon dioxide(CO_(2)),carbon monoxide(CO),hydrocarbons(UHC),and nitrogen oxide(NOX)were measured using a gas *** smoke opacity was measured using an OPABOX smoke *** comparing the results related to the different modes with mode I at full load,the BTE(Brake thermal efﬁciency)increased by 20.17%,11.45%,and 12.66%with modes II,III,and IV,*** comparison to the results for mode II,the BTE decreased due to the combustion of ECB blends by 7.26%and 6.24%for mode III and mode IV,respectively,at full *** comparison to mode II,the Brake speciﬁc energy consumption(BSEC)increased with the ECB *** ECB blends,there is a noticeable decrease in the CO,CO_(2),and UHC emissions at a partial ***,the 20%ECB has no effect on CO emissions at full *** modes II and IV,the CO_(2)increased by 33.33%and 19%,respectively,while the UHC emissions were reduced by 14.49%for mode III and 26.08%for mode *** smoke of mode III was lower by 7.21%,but for mode IV,it was higher by 12.37%.In addition,with mode III and mode IV,the NOx emissions increased by 30.50%

关键词： eichhornia crassipes biodiesel dual-fuel engine liqueﬁed petroleum gas combustion diesel engine brake thermal efﬁciency

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