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A numerical investigation into the effect of altering compression ratio, injection timing, and injection duration on the performance of a diesel engine fuelled with diesel-biodiesel-butanol blend

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Clean Energy 2024年第5期8卷 73-96页

作者： Abdulkarim Youssef Amr Ibrahim Mechanical Engineering Department Beirut Arab University115020 BeirutLebanon Mechanical Engineering Department Alexandria UniversityAlex 21544Egypt

Using renewable fuels for diesel engines can reduce both air pollution and dependence on fossil fuels.A computer simulation was constructed to predict the performance,combustion characteristics,and NOx emissions of a diesel engine fuelled with diesel-biodiesel-butanol *** simulation was validated by comparing the modelling results against experimental data and a good agreement between the results was *** fuels used for the validation were diesel(B0),biodiesel(B100),diesel-biodiesel blend(B50),and two diesel-biodiesel-butanol blends with 45%diesel-45%biodiesel-10%butanol(Bu10)and 40%diesel-40%biodiesel-20%butanol(Bu20)by *** results showed that the addition of butanol reduced NOx emissions but deteriorated the engine *** aim of the current work was the numerical optimization of the different parameters to enhance the engine performance while using butanol to decrease NOx *** engine compression ratio(CR)varied from 14 to 24,in increments of *** injection timing(IT)was reduced from 30°before top dead centre(bTDC)to 5°bTDC in increments of 5°.Also,the fuel injection duration(IDur)was extended from 20°to 50°in increments of 10°.Results showed that the increase in the CR improved engine performance for the two investigated fuels,Bu10 and *** maximum engine brake power(BP),thermal efficiency(BTE),and minimum brake-specific fuel consumption(BSFC)of 1.46 kW,32.3%,and 0.273 kg/kWh respectively,were obtained when the Bu10 fuel was injected under the optimum conditions of 24 CR,15°bTDC IT,and 40°*** these optimum conditions,the BP,BTE,and BSFC improved by 3%-3.5%for Bu10 and Bu20 fuel blends compared with the base engine conditions of a CR of 22,30°IDur,and 10°bTDC *** heat release rate during the premixed phase increased when the IT was advanced,while the mixing-controlled combustion phase was enhanced when the IT was *** emissions increased with increasing CR,while both an increase in IDur at con

关键词： compression ratio injection timing injection duration butanol biodiesel diesel

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Optimization of injection timing and injection Duration of a Diesel Engine Running on Pure Biodiesel SME (Soya Methyl Ester)

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Open Journal of Applied Sciences 2020年第7期10卷 486-502页

作者： Abdullah Alghafis Eihab A. Raouf Mechanical Engineering Department Unaizah Engineering College Qassim University Unaizah KSA

This study was carried out to predict the impact of injection timing and injection duration on engine brake power and Nitrogen Oxides emissions in a diesel engine using biofuel Soya Methyl Ester (SME). Predictions were accomplished at three different injection timings 10°, 5° Crank Angle (CA) before Top Dead Center (bTDC) and 0° CA at Top Dead Center (TDC) and four injection durations 20°, 25°, 30°, 35° CA. The study was conducted using a simulation software (Diesel-RK). The predicted results showed that the powers produced by all the setups of the different injection timings are almost equal, but they differ in injection durations, e.g. the power at setup (10° CA-bTDC) duration 20° CA and 2500 rpm equal to 52 kW, at setup (5° CA

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Comparative Assessment of Low-Concentration Ethanol and Waste Fish Oil Biodiesel Blends on Emission Reduction and Performance Improvement in Variable Compression Ratio Engine

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Journal of Thermal Science 2023年第3期32卷 1306-1319页

作者： Vasanthaseelan SATHIYASEELAN Savadamuthu LAKSHMANA GOWDER Ravishankar SATHYAMURTHY Department of Mechanical Engineering KPR Institute of Engineering and TechnologyArasurCoimbatore-641407Tamil NaduIndia Department of Mechanical Engineering SNS College of TechnologyCoimbatoreTamil NaduIndia Mechanical Engineering Department King Fahd University of Petroleum and MineralsDhahranSaudi Arabia

The costs of conventional fuels are rising on a daily basis as a result of technical limits,a misallocation of resources between demand and supply,and a shortage of conventional *** use of crude oil contributes to increased environmental contamination,and as a result,there is a pressing need to investigate alternate fuel sources for car *** is a renewable fuel that is derived chemically by reacting with the sources of *** present research is based on analyzing the effect of fish oil biodiesel-ethanol blend in variable compression engine for variable compression ratio(VCR).The processed fish oil was procured and subjected to a transesterification process to convert fatty acids into methyl *** obtained methyl esters(biodiesel)were blended with ethanol and diesel to obtain a ternary *** ternary blend was tested for its stability,and a stable blend was obtained and tested in VCR engines for its performance,combustion,and emission *** the second phase,experiments are conducted in the diesel engine by fueling the fish oil methyl ester and ethanol blended with diesel fuel in the concentration of 92.5 vol%of Diesel+7.5 vol%of Fish oil+1.25vol%ethanol,92.5 vol%of Diesel+7.5 vol%of Fish oil+5 vol%ethanol,87.5 vol%of Diesel+12.5 vol%of Fish oil+1.25 vol%ethanol,87.5 vol%of Diesel+12.5 vol%of Fish oil+5 vol%ethanol,82.5 vol%of Diesel+17.5vol%of Fish oil+1.25 vol%ethanol,82.5 vol%of Diesel+17.5 vol%of Fish oil+5 vol%ethanol to find out the performance parameters and *** the alternative fuel performs better in terms of engine performance and pollution management,the percentage chosen is considered the best *** results showed that the use of a lower concentration of ethanol in the fish oil biodiesel blend improved the engine thermal efficiency by 5.23%at a higher compression ***,the engine operated with a higher compression ratio reduced the formation of HC and CO emissions,whereas the NOxa

关键词： biodiesel VCR alternate fuels fish oil performance combustion emission injection timing crank angle

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Experimental study on combustion pressure oscillation of soybean bio diesel oil

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International Journal of Agricultural and Biological Engineering 2016年第6期9卷 156-166页

作者： Ma Peng Liu Huili Liu Shengyong Biomass Utilization Research and Development Center Zhongzhou UniversityZhengzhou 450044China Students'Affairs Division Zhengzhou Normal UniversityZhengzhou 450044China Key Laboratory of Renewable Energy Ministry of Agriculture Henan Agricultural UniversityZhengzhou 450002China

The principal objectives of this study were to examine in-cylinder combustion pressure oscillation characteristics of soybean biodiesel in time domain and time-frequency domain,and their influences on the control and operational parameters,such as injection timing,exhaust gas recirculation(EGR)ratio,engine load and engine *** this study,the combustion pressure oscillation characteristics of biodiesel engine for various injection timing,EGR ratio and engine speed were *** corresponding relation of pressure characteristics in the time domain and frequency domain were *** results showed that the pressure oscillation and peak pressure rise acceleration occurred mainly in the diffusion combustion,and the peak pressure rise rate located in the premixed *** in-cylinder pressure level curve can be divided into three *** pressure levels of stage 1,stage 2 and stage 3 represent the peak in-cylinder pressure,the maximum amplitude of pressure rise rate and pressure rise acceleration,*** the injection timing retards,the pressure levels of stage 1 and stage 3 decrease *** pressure level curve of stage 3 with 25°before top dead center(BTDC)is the highest and the oscillation is the most *** is worth noting that the location of each stage with various operate conditions is not *** 0.41 MPa indicated mean effective pressure(IMEP),with the increase of EGR rate,the pressure levels of stage 1 and stage 2 decrease *** pressure level curve of stage 3 and the maximum amplitude of pressure rise acceleration with 0%EGR rate are the *** oscillation with 0%EGR rate is the most significant at 0.41 MPa *** to 0.41 MPa IMEP,the frequency bands of stage 1 and stage 2 at 1.1 MPa IMEP are relatively low due to the soft combustion in the *** EGR rate increases,the pressure level of stage 1 decreases,and those of stage 2 and stage 3 increase *** oscillation with 30%EGR rate

关键词： combustion pressure oscillation soybean biodiesel injection timing exhaust gas recirculation engine speed

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Mixture Preparation and Combustion of CNG Low-Pressure Compound Direct injection Spark-Ignited Engines

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Transactions of Tianjin University 2011年第6期17卷 411-417页

作者：胡春明侯圣智詹樟松刘斌刘娜于勇宋玺娟 Internal Combustion Engine Research Institute Tianjin University State Key Laboratory of Engines Tianjin University Chongqing Chang' an Automobile Ltd. Co.

A set of compressed natural gas (CNG) multi-point direct injection system of spark-ignited engines and the corresponding measurement and data acquisition systems were developed in this paper. Based on different injection modes, the mixture formation and combustion of CNG low-pressure direct injection (LPDI) engines were studied under varying factors such as air/ fuel ratio, injection timing. Meanwhile, three-dimensional simulations were adopted to explain the mixture formation mechanisms of CNG low-pressure compound direct injection (LPCDI) mode. On the basis of test results and simulation of the mixture homogeneous degree, the conception of injection window was proposed, and the LPCDI mode was proved to be more beneficial to the mixture concentration stratification formation in cylinder under lean-burning conditions, which resulted in effective combustion and stability.

关键词： compressed natural gas (CNG) engine mixture homogeneous degree injection timing low pressure compound direct injection (LPCDI)

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Optimization of injection Parameters for Profile Control and Flooding in an Oilfield during High Water Cut Period

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Journal of Geoscience and Environment Protection 2023年第11期11卷 73-81页

作者： Meinan Wang Hui Cai Xiaoqi Chen Junting Zhang Yue Xie Bohai Oilfield Research Institute of CNOOC Ltd. Tianjin Branch Tianjin China

In order to improve the effect of water control and oil stabilization during high water cut period, a mathematical model of five point method well group was established with the high water cut well group of an Oilfield as the target area, the variation law of water cut and recovery factor of different injection parameters was analyzed, and the optimization research of injection parameters of polymer enhanced foam flooding was carried out. The results show that the higher the injection rate, the lower the water content curve, and the higher the oil recovery rate. As the foam defoamed when encountering oil, when the injection time was earlier than 80% of water cut, the later the injection time was, the better the oil displacement effect would be. When the injection time was later than 80% of water cut, the later the injection time was, the worse the oil displacement effect would be. The larger the injection volume, the lower the water content curve and the higher the recovery rate. After the injection volume exceeded 0.2 PV, the amplitude of changes in water content and recovery rate slowed down. The optimal injection parameters of profile control agent for high water content well group in Oilfield A were: injection rate of 15 m3/d, injection timing of 80% water content, and injection volume of 0.2 PV.

关键词： High Water Cut Period Profile Control injection Rate injection timing injection Volume

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Combustion and Emission Characteristics of Soybean Oil Biodiesel(SOB) and Gasoline Blends in a Partially Premixed Compression Ignition Engine

Combustion and Emission Characteristics of Soybean Oil Biodi...

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2018中国汽车工程学会年会

作者： LI Qian LANG Jing NIE Xianghong Powertrain R&D Institute Chongqing Changan Automobile Co.Ltd School of Energy and Power Engineering Huazhong University of Science and Technology

In previous studies,Partially Premixed Compression Ignition(PPCI) combustion can obtain both good combustion controllability,performance and emissions in diesel engines with *** article focuses on achieving Soybean Oil Biodiesel(SOB)/gasoline PPCI combustion in a single cylinder diesel engine through moderate and low operating *** and emission characteristics of SOB and gasoline blends in a PPCI engine have been *** results show that low temperature ignition property of gasoline can be improved by doping *** best SOB addition is 30%in volume fraction which has the highest indicated thermal efficiency:52%,and better emission characteristic compares to pure *** experiments on PPCI combustion of 30%SOB/gasoline blend with different fuel injection timings and exhaust gas recirculation(EGR) ratios have been carried out to find out impacts of fuel injection timing and EGR on PPCI *** results show that both the fuel injection timing and EGR can affect performance and emissions of the PPCI *** the consideration of engine emissions and efficiency,12 CA BTDC fuel injection timing is the best choice.26%Hot-EGR(EGR without cooling) and 40%Quasi-EGR(CO as an EGR simulation gas) are the best for low load(0.158 MPa BMEP) and moderate load(0.395 MPa BMEP) *** EGR ratio increases to 50%,both Hot-EGR and Quasi-EGR could reduce NO emission more than 70%while the fuel consumption increases slightly.

关键词： partially premixed compression lgnition(PPCI) soybean oil biodiesel(SOB) injection timing exhaust gas recirculation(EGR) combustion and emission

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