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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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The Influence of Methanol Mass Ratio and Compression Ratio on Combustion Characteristics of dual-fuel engine

The Influence of Methanol Mass Ratio and Compression Ratio o...

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2018中国汽车工程学会年会

作者： LI Peng ZHU Jianjun WU Wenjie Taiyuan University of Technology

A study was conducted in a dual fuel engine to explore the influence of methanol mass ratio and compression ratio on the combustion characteristics,a set of methanol injection device was installed on a single cylinder diesel *** results show that,with the increase of the methanol mass ratio,the in-cylinder pressure gradually decreases,the pressure rise rate and the heat release rate increase firstly and then decrease,the start of combustion gradually postpone and combustion duration gradually short The decrease of the compression ratio causes the increase of the peak heat release rate,but it has complex effects on the peak in-cylinder pressure,the peak pressure rise rate,start of combustion and combustion *** the compression ratio is 15.9,the peak in-cylinder pressure and the peak pressure rise rate are highest,the start of combustion is earliest and the combustion duration is longest.

关键词： dual-fuel engine methanol biodiesel compression ratio combustion

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集装箱船双燃料发动机投资的环境与经济评价

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哈尔滨工程大学学报（英文版） 2023年第4期22卷 823-836页

作者： Çağlar Karatuğ Emir Ejder Mina Tadros Yasin Arslanoğlu Istanbul Technical University Maritime Faculty34940TuzlaIstanbulTurkey Marine Offshore and Subsea Technology GroupMechanical Engineering and Marine TechnologySchool of EngineeringNewcastle UniversityNewcastle Upon TyneNE17RUUK Department of Naval Architecture and Marine engineering Faculty of EngineeringAlexandria UniversityAlexandria 21544Egypt

In this study,environmental and economic examinations of Liquefied Natural Gas(LNG)investments are conducted.A year-long noon report data is received from a container ship and LNG conversion is *** from both the fuel expenses and the amount of the emissions are calculated and *** eliminate the fuel consumption uncertainties in future operation periods of the stated ship,different scenarios that simulate various fuel consumption statuses are created and analyzed within the Monte Carlo Simulation ***,calculations are made with two different time prices,*** and half year *** a result of the analyses,LNG can provide high environmental benefits since it reduces 99%for SOx,95%for PM10,95%for PM2.5,41%for CO_(2),and 82%for NOx,*** is also determined that LNG investment is highly sensitive to fuel *** addition,the LNG usage can be beneficial for maritime companies in terms of marine policies such as paying carbon tax based on the expanding European Union Emission Trade System to maritime ***,it needs supportive carbon reduction method to comply with the maritime decarbonization *** study has great importance in that the economic analysis way presented is able to adapt any alternative fuel system conversion for the maritime industry.

关键词： dual-fuel engine Monte Carlo simulation Emission reduction Maritime transportation Economic analysis Environmental analysis

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