RSM based optimization of performance and emission characteristics of DI compression ignition engine fuelled with diesel/aegle marmelos oil/diethyl ether blends at varying compression ratio, injection pressure and injection timing

Krishnamoorthi, M.; Malayalamurthi, R.; Shameer, P. Mohamed

doi:10.1016/j.fuel.2018.02.070

Cited by 53 publications

(21 citation statements)

References 41 publications

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“…2) in the combustion cycle. Figure 8 shows that the exhaust temperature (ET) increased with increasing fuel injection pressure for different engine operating conditions [32]. This may be related to the combustion temperature, as increasing the injection pressure leads to quicker combustion with high in-cylinder temperatures and eventually higher NO x emissions.…”

Section: Effects Of Fuel Injection Pressurementioning

confidence: 99%

Effect of fuel injection strategy on combustion performance and NOx/smoke trade-off under a range of operating conditions for a heavy-duty DI diesel engine

Fayad

2019

SN Appl. Sci.

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The combustion process and exhaust emissions of a conventional diesel engine can be improved by manipulating the injection strategy (timing and pressure) without modification of the design. In this work, the influence of the injection strategy on the NO x emissions and smoke level was investigated experimentally for a heavy-duty diesel engine operated using diesel fuel. Different injection timings and pressures were applied to produce a variety of engine-out emission levels over different engine operating conditions. The experimental results revealed that retarding the fuel injection timing enhanced the fuel economy by reducing the brake-specific fuel consumption (BSFC). In addition, the NO x emissions were also reduced by retarding the injection timing at different engine speeds and loads. For the tested operating conditions, the NO x emissions and BSFC were lower at low engine speed and high engine load, in particular at 1200 rpm and full load (100%), respectively. The results of the experimental work indicated that the brake thermal efficiency (BTE) increased with retarded injection timings at various engine speeds. Also, the BTE was higher at low engine speed (1800 rpm) and for different injection timings. Besides, the smoke level was improved for retarded injection timing and low engine speed. Lower exhaust smoke opacity was obtained at high injection pressure compared with low injection pressure for different engine test conditions. Use of the control engine operating conditions and high injection pressure enhanced the exhaust gas temperature and BSFC, but slightly increased the NO x emissions. Keywords Engine performance • Injection pressure • Injection timing • Operating conditions • Nitrogen oxides (NO x) • Emissions • Diesel engine Abbreviations ET Exhaust gas temperature (K) P inj Fuel injection pressure (bar) NO x Nitrogen oxides CO Carbon monoxide HC Hydrocarbon BSFC Brake-specific fuel consumption (g/kWh) bTDC Before top dead center θ Injection advance angle (°, before top dead center) rpm Revolutions per minute N Engine speed

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Section: Effects Of Fuel Injection Pressurementioning

confidence: 99%

Effect of fuel injection strategy on combustion performance and NOx/smoke trade-off under a range of operating conditions for a heavy-duty DI diesel engine

Fayad

2019

SN Appl. Sci.

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“…Further, the friction losses from the combustion chamber wall and also the heat loss could reduce with enrichment of hydrogen and consequently higher the BTE. Also, BTE was depicted higher at a superior compression ratio due to enhanced compression temperature which elevates the combustion efficiency [18,19]. Maximum BTE was noticed as 28.86% at a combination of CR 18.5, HFR 15 lpm, and 12 kgf load condition.…”

Section: Response Surface Methodologies (Rsm)mentioning

confidence: 90%

“…Response surface methodology is the numerical technique to model and analyzes diverse problems during optimization of process parameters. The desirability approach is used in multi-response problems to hold the benefit of accessibility and flexibility in response adjustment [18]. The present study intends to model and predict the experimental process output responses using the RSM technique.…”

Section: Response Surface Methodologies (Rsm)mentioning

confidence: 99%

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Comprehensive performance, combustion, emission, and vibration parameters assessment of diesel engine fuelled with a hybrid of niger seed oil biodiesel and hydrogen: response surface methodology approach

et al. 2020

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The present investigation centered on the application of response surface methodology to assess the engine operating parameters namely performance, combustion, emission, and vibration characteristics of variable compression ratio direct injection single-cylinder diesel engine operating with Niger seed oil methyl ester blend and hydrogen in dual fuel mode. Response surface models were developed using the experimental data of input and output variables. The fuel blend, load, compression ratio, and hydrogen flow rate were considered as input responses while the brake thermal efficiency, brake specific fuel consumption, cylinder pressure and net heat release rate, carbon monoxide (CO), unburnt hydrocarbon, Nitrogen oxides (NO x), smoke opacity, and RMS velocity respectively were considered as the output responses. The input conditions altered were: loads of 29.43 N (3 kgf), 58.86 N (6 kgf), 88.29 N (9 kgf), and 117.72 N (12 kgf), compression ratios of 16, 17.5, and 18.5, and the hydrogen flow rates of 5 lpm, 10 lpm, and 15 lpm. The output information of the test was assessed using response surface methodology (RSM) and the polynomial model (second-request) was created. The experimental values were in good match with RSM predicted values and maintained an R 2 value of more than 0.95 for all the test run combinations. Further, all the test points sustained comparatively within the 10% maximum deviation. Keywords Brake thermal efficiency • Compression ratio • Smoke opacity • Hydrogen • Cylinder pressure Abbreviations CR Compression ratio FB Fuel blend HFR Hydrogen flow rate (lpm) BTE Brake thermal efficiency (%) BSFC Brake specific fuel consumption (kg/kWhr) NSOME Niger seed oil methyl ester B20 20% NSOME in diesel CO Carbon monoxide (%) UHC Unburnt hydrocarbon (ppm) NOx Nitrogen oxides (ppm) CI Compression ignition ASTM American standards for testing materials ADC Analog to digital converter lpm Liter per minute CP Cylinder pressure (bar) NHRR Net heat release rate (J/deg.) q Net heat release rate (J/deg.) q Heat Heat transfer rate combustion chamber wall (J/deg.) V Volume change with crank angle (m 3 /deg.) p Pressure change with crank angle (bar/deg.)

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“…The diesel engine emissions visible product obtained by combustion of fuel is known as smoke. The emission of smoke is due to the high rate of fuel consumption [46] and incomplete combustion of fuel in diffusive combustion phase. The comparison of smoke opacity of ES biodiesel blend and base diesel at different loading is shown in Fig.…”

Section: Fig 6: Variation Of Smoke Opacity With Loadmentioning

confidence: 99%

Production of Biodiesel from Eruca Sativa (Taramira) and Its Utilization in DI Diesel Engine for Examining the Exhaust Emissions

Hussain*,

Biradar

2020

IJRTE

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Increasing demand of the carbon fuels in daily life and the global environmental degradation has led to the biodiesel production from non-edible oils because they has high potential as ecological, clean, facile and renewable fuel. In present study, oil is extracted from dried Eruca sativa seeds using mechanical expellers, the oil yield obtained is calculated. By alkaline transesterification, the obtained oil is converted into biodiesel. The physicochemical properties of Eruca sativa biodiesel are tested following ASTM test methods, all the properties satisfies and meet the ASTM D-6751 biodiesel standard specifications. The gas chromatography technique is used for the analysis of fatty acid composition of the biodiesel, which shows that the erucic acid has higher percentage composition. Emission characteristics (i.e. carbon monoxide, carbon dioxide, hydro carbon, nitrogen oxide and smoke) of diesel engine are analyzed for the biodiesel and its blends (i.e. B10, B20, B30, B40 and B100) and are compared with the petroleum diesel. From the emission results obtained it is observed that, the CO and CO2 emissions are lower for B10 and B20 blends whereas the HC emissions are lesser than diesel for all the blends. For B10, B20 and B30 blends the NOX emission and smoke opacity has been reduced when compared to diesel.

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RSM based optimization of performance and emission characteristics of DI compression ignition engine fuelled with diesel/aegle marmelos oil/diethyl ether blends at varying compression ratio, injection pressure and injection timing

Cited by 53 publications

References 41 publications

Effect of fuel injection strategy on combustion performance and NOx/smoke trade-off under a range of operating conditions for a heavy-duty DI diesel engine

Effect of fuel injection strategy on combustion performance and NOx/smoke trade-off under a range of operating conditions for a heavy-duty DI diesel engine

Comprehensive performance, combustion, emission, and vibration parameters assessment of diesel engine fuelled with a hybrid of niger seed oil biodiesel and hydrogen: response surface methodology approach

Production of Biodiesel from Eruca Sativa (Taramira) and Its Utilization in DI Diesel Engine for Examining the Exhaust Emissions

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