Effect of injection timing and EGR on engine-out-responses of a common-rail diesel engine fueled with neat biodiesel

Teoh, Yew Heng; Masjuki, H.H.; Kalam, M.A.; How, Heoy Geok

doi:10.1039/c5ra14831f

Cited by 10 publications

(5 citation statements)

References 47 publications

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“…On the other hand, TSOBD blends in diesel engines can reduce CO and SO 2 emissions while slightly increasing NO x emissions ( Usta, 2005 ; He et al, 2021 ). The TSOBD mixing ratio ( Parlak et al, 2012 ), injection opening pressure ( Hountalas et al, 2003 ), injection time ( Teoh et al, 2015 ), engine load ( He et al, 2021 ), engine speed ( Parlak et al, 2013 ), engine type ( Rao et al, 2013c ), and compression ratio ( Guntur and Prasanthi, 2018 ) affect TSOBD blend properties and pollutant emissions. It is worth noting that a fuel blend with a low percentage of TSOBD is more efficient at a higher load than at a partial load ( Usta, 2005 ).…”

Section: Properties and Application Of Biodiesel From Tobacco Seed Oilmentioning

confidence: 99%

Advancements in Tobacco (Nicotiana tabacum L.) Seed Oils for Biodiesel Production

Wu¹,

Chuanchuan

Pan

et al. 2022

Front. Chem.

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With the increasing demand for fossil fuels, decreasing fossil fuel reserves and deteriorating global environment, humanity urgently need to explore new clean and renewable energy to replace fossil fuel resources. Biodiesel, as an environmentally friendly fuel that has attracted considerable attention because of its renewable, biodegradable, and non-toxic superiority, seems to be a solution for future fuel production. Tobacco (Nicotiana tabacum L.), an industrial crop, is traditionally used for manufacturing cigarettes. More importantly, tobacco seed is also widely being deemed as a typical inedible oilseed crop for the production of second-generation biodiesel. Advancements in raw material and enhanced production methods are currently needed for the large-scale and sustainable production of biodiesel. To this end, this study reviews various aspects of extraction and transesterification methods, genetic and agricultural modification, and properties and application of tobacco biodiesel, while discussing the key problems in tobacco biodiesel production and application. Besides, the proposals of new ways or methods for producing biodiesel from tobacco crops are presented. Based on this review, we anticipate that this can further promote the development and application of biodiesel from tobacco seed oil by increasing the availability and reducing the costs of extraction, transesterification, and purification methods, cultivating new varieties or transgenic lines with high oilseed contents, formulating scientific agricultural norms and policies, and improving the environmental properties of biodiesel.

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Section: Properties and Application Of Biodiesel From Tobacco Seed Oilmentioning

confidence: 99%

Advancements in Tobacco (Nicotiana tabacum L.) Seed Oils for Biodiesel Production

Wu¹,

Chuanchuan

Pan

et al. 2022

Front. Chem.

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“…In addition, maximum ICP and maximum ICT increase since the main combustion takes place closer to TDC. Advancing SoI further to −30 • CA causes a significant rise in the first peak of HRR due to a longer ignition delay, which tends to promote more premixed combustion and increase in maximum ICT and maximum ICP [42][43][44]. Furthermore, it can be clearly seen from the figure that as SoI is advanced from 0 • CA to −30 • CA, ignition delay for post injection and therefore second peak of HRR decrease since α post is constant and post injection is performed at higher ICT conditions.…”

Section: Combustion Analysismentioning

confidence: 99%

“…When SoI is delayed to 0 • CA, BSFC increases compared to SoI: −12 • CA as the start of combustion shifts towards the expansion stroke ( Figure 12) and the contribution to power production decreases due to the reduction in maximum ICP [44]. On the other hand, by advancing SoI to −30 • CA, maximum ICP increases but the crank angle at which the ICP is maximum become closer to TDC, and more significant part of the pressure rise occurs before the TDC (Figure 12) leading to rise in BSFC [42]. As the α post increases for SoI: 0 • CA, BSFC increases due to the reduction in the contribution of post injection on power production [49].…”

Section: Emission and Performance Analysismentioning

confidence: 99%

Numerical Investigation and Multi-Objective Optimization of Internal EGR and Post-Injection Strategies on the Combustion, Emission and Performance of a Single Cylinder, Heavy-Duty Diesel Engine

Akgül

Özener

Büyük³

et al. 2020

Energies

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This work presents a numerical study that investigates the optimum post-injection strategy and internal exhaust gas recirculation (iEGR) application with intake valve re-opening (2IVO) aiming to optimize the brake specific nitric oxide (bsNO) and brake specific soot (bsSoot) trade-off with reasonable brake specific fuel consumption (BSFC) via 1D engine cycle simulation. For model validation, single and post-injection test results obtained from a heavy-duty single cylinder diesel research engine were used. Then, the model was modified for 2IVO application. Following the simulations performed based on Latin hypercube DoE; BSFC, bsNO and bsSoot response surfaces trained by feedforward neural network were generated as a function of the injection (start of main injection, post-injection quantity, post-injection dwell time) and iEGR (2IVO dwell) parameters. After examining the effect of each parameter on pollutant emission and engine performance, multi-objective pareto optimization was performed to obtain pareto optimum solutions in the BSFC-bsNO-bsSoot space for 8.47 bar brake mean effective pressure (BMEP) load and 1500 rpm speed condition. The results show that iEGR and post-injection can significantly reduce NO and soot emissions, respectively. The soot oxidation capability of post-injection comes out only if it is not too close to the main injection and its efficiency and effective timing are substantially affected by iEGR rate and main injection timing. It could also be inferred that by the combination of iEGR and post-injection, NO and soot could be reduced simultaneously with a reasonable increase in BSFC if start of main injection is phased properly.

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“…The engine performance in this experiment was compared based on BSFC, brake specific energy consumption (BSEC) and BTE achieved. These parameters can be determined using the equations below: [41,42].…”

Section: Engine Performancementioning

confidence: 99%

Experimental Investigation of Performance, Emission and Combustion Characteristics of a Common-Rail Diesel Engine Fuelled with Bioethanol as a Fuel Additive in Coconut Oil Biodiesel Blends

Teoh

How

et al. 2019

Energies

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In the present study, the effects of adding of bioethanol as a fuel additive to a coconut biodiesel-diesel fuel blend on engine performance, exhaust emissions, and combustion characteristics were studied in a medium-duty, high-pressure common-rail turbocharged four-cylinder diesel engine under different torque conditions. The test fuels used were fossil diesel fuels, B20 (20% biodiesel blend), B20E5 (20% biodiesel + 5% bioethanol blend), and B20E10 (20% biodiesel + 10% bioethanol blend). The experimental results demonstrated that there was an improvement in the brake specific energy consumption (BSEC) and brake thermal efficiency (BTE) of the blends at the expense of brake specific fuel consumption (BSFC) for each bioethanol blend. An increment in nitrogen oxide (NOx) across the entire load range, except at low load conditions, was found with a higher percentage of the bioethanol blend. Also, it was found that simultaneous smoke and carbon monoxide (CO) emission reduction from the baseline levels of petroleum diesel fuel is attainable by utilizing all types of fuel blends. In terms of combustion characteristics, the utilization of bioethanol blended fuels presented a rise in the peak in-cylinder pressure and peak heat release rate (HRR) at a low engine load, especially for the B20E10 blend. Furthermore, the B20E10 showed shorter combustion duration, which reduced by an average of 1.375 °CA compared to the corresponding baseline diesel. This study therefore showed that the B20E10 blend exhibited great improvements in the diesel engine, thus demonstrating that bioethanol is a feasible fuel additive for coconut biodiesel-diesel blends.

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Effect of injection timing and EGR on engine-out-responses of a common-rail diesel engine fueled with neat biodiesel

Abstract: This work attempts to reduce the emissions of BSNOx and smoke from the levels of fossil diesel by using palm methyl ester biodiesel. With PME fuel, engine operation at 30% EGR resulted in the optimum trade-off between BSNOx and smoke emissions.

Cited by 10 publications

References 47 publications

Advancements in Tobacco (Nicotiana tabacum L.) Seed Oils for Biodiesel Production

Advancements in Tobacco (Nicotiana tabacum L.) Seed Oils for Biodiesel Production

Numerical Investigation and Multi-Objective Optimization of Internal EGR and Post-Injection Strategies on the Combustion, Emission and Performance of a Single Cylinder, Heavy-Duty Diesel Engine

Experimental Investigation of Performance, Emission and Combustion Characteristics of a Common-Rail Diesel Engine Fuelled with Bioethanol as a Fuel Additive in Coconut Oil Biodiesel Blends

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