Experimental Study of Injection Parameters on the Performance of a Diesel Engine with Fischer–Tropsch Fuel Synthesized from Coal

Shi, Jinhong; Wang, Tie; Zhao, Zhen; Yang, Tiantian; Zhang, Zhengwu

doi:10.3390/en11123280

Cited by 13 publications

(11 citation statements)

References 26 publications

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“…Equation defines the heat release rate, which is based on the first law of the thermodynamics Heat transfer is calculated according to Newton’s cooling law, as eq , and heat transfer coefficient can be calculated according to eqs – − where k and V are the adiabatic exponent and the working volume. In addition, P , Q ht , h g , A , T g , T w , ω, and n c are the cylinder pressure, the heat transfer coefficient, the area of the combustion chamber, gas temperature, the mean piston velocity, in-cylinder wall temperature, and the polytrophic index, respectively.…”

Section: Experimental Setup and Test Fuelsmentioning

confidence: 99%

Energy-Saving and Pollution-Reduction Potential Analysis for Diesel Engines Fueled with Fischer–Tropsch Fuel

et al. 2021

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Alternative fuels have attracted wide attention owing to the increasing energy consumption and environmental pollution problems, which are caused by the extensive application of diesel engines for various occasions. The Fischer−Tropsch (F−T) diesel synthesized from coal is considered as one kind of ideal alternative fuel for diesel engines; however, its combustion and exhaust emission characteristics are different from those of national diesel owing to its special fuel properties. Therefore, the combustion and emission characteristics of F−T diesel and 0# diesel, which meet the China stage VI were compared in a common rail direct injection (CRDI) diesel engine. Moreover, energy-saving and pollution-reduction potential were analyzed in one CRDI diesel engine fueled with F−T diesel. The results showed that F−T diesel had an earlier ignition point, shorter ignition delay, lower cylinder pressure, and heat release rate compared with those of 0# diesel at the same operating conditions. Meanwhile, the amplitude, oscillation level, and energy of cylinder pressure were decreased to some extent, with the maximum drops of 0.98 bar, 16.4 dB, and 1.01 × 10 12 Pa, respectively. Additionally, under external characteristic conditions, maximum break thermal efficiency (BTE) and break-specific fuel consumption (BSFC) of F−T diesel were reduced by 1.1 and 2.1% on average compared with those of 0# diesel. In addition, CO, HC, NOx, and SOOT emissions of F−T diesel were found to be lower than those of 0# diesel, which were decreased by an average of 8, 3.7, 2.1, and 1.3%, respectively.

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Section: Experimental Setup and Test Fuelsmentioning

confidence: 99%

Energy-Saving and Pollution-Reduction Potential Analysis for Diesel Engines Fueled with Fischer–Tropsch Fuel

et al. 2021

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“…The present work focuses on pre-injection systems. It is well known that pilot injections reduce NO x noticeably [13][14][15][16][17], but sometimes pilot injections can increase consumption and other pollutants such as smoke or hydrocarbons (HC) [18][19][20][21][22], mainly depending on parameters such as injection time, duration, number of pre-injections, dwelling time, etc. Since these parameters provide conflicting results, a formal tool to establish the most appropriate injection pattern is necessary.…”

Section: Introductionmentioning

confidence: 99%

Optimization of a Multiple Injection System in a Marine Diesel Engine through a Multiple-Criteria Decision-Making Approach

Galdo

Castro-Santos

Rodríguez³

2020

JMSE

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In this work, a numerical model was developed to analyze the performance and emissions of a marine diesel engine, the Wärtsilä 6L 46. This model was validated using experimental measurements and was employed to analyze several pre-injection parameters such as pre-injection rate, duration, and starting instant. The modification of these parameters may lead to opposite effects on consumption and/or emissions of nitrogen oxides (NOx), carbon monoxide (CO), and hydrocarbons (HC). According to this, the main goal of the present work is to employ a multiple-criteria decision-making (MCDM) approach to characterize the most appropriate injection pattern. Since determining the criteria weights significantly influences the overall result of a MCDM problem, a subjective weighting method was compared with four objective weighting methods: entropy, CRITIC (CRiteria Importance Through Intercriteria Correlation), variance, and standard deviation. The results showed the importance of subjectivism over objectivism in MCDM analyses. The CRITIC, variance, and standard deviation methods assigned more importance to NOx emissions and provided similar results. Nevertheless, the entropy method assigned more importance to consumption and provided a different injection pattern.

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“…Although it contains thousands of components, the main components are straight-chain saturated hydrocarbons, branched isomeric saturated hydrocarbons and a small number of cycloalkanes. In addition, F-T fuel contains no sulfur and aromatics, generally giving lower emission values when combusted [2]. Compared with petrodiesel, F-T diesel has a higher cetane number (CN) and it can be mixed with petroleum-based diesel directly [3].…”

Section: Introductionmentioning

confidence: 99%

Establishment and Validation of a Two-Component Surrogate Fuel Chemical Kinetic Skeletal Model for Fischer–Tropsch Fuel Synthesized from Coal

et al. 2020

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Fischer–Tropsch (F–T) fuel, synthesized from coal-to-liquid (CTL), is an alternative fuel with clean and efficient characteristics. In this study, a surrogate fuel model was developed, including n-dodecane (n-C12H26) and iso-octane (i-C8H18), which represents the n-alkane and iso-alkane in F–T fuel synthesized from CTL, respectively. The proportions of the components in the surrogate fuel are determined by the characteristics of the practical fuel, including cetane number (CN), C/H ration and component composition. For the establishment of the skeletal mechanism model, firstly, based on a two-step direct relationship graph (DRG) and the computational singular perturbation (CSP) importance index method, a reduced model of n-dodecane was developed involving 159 species and 399 reactions, while the detailed n-dodecane mechanism consists of 1279 species and 5056 reactions. Then, the n-dodecane skeletal mechanism was constructed based on a decoupling methodology, involving the skeletal C12 mechanism from the reduced mechanism, a C2-C3 sub mechanism and a detailed H2/CO/C1 sub mechanism. Finally, the skeletal mechanism for the F–T surrogate fuel was developed, including the n-dodecane skeletal mechanism and an iso-octane macromolecular skeletal mechanism. The final mechanism for the F–T diesel surrogate fuel consists of 169 species and 406 reactions. The n-dodecane skeletal mechanism and iso-octane skeletal mechanism were validated on various fundamental experiments, including the ignition delay in shock tubes, the primary species concentrations in jet-stirred reactors and the premixed laminar flame over wide operating conditions, which show great agreement between the predictions and measurements. Moreover, an F–T surrogate fuel mechanism was employed to simulate the combustion characteristics of an engine using computational fluid dynamics (CFD). The results show that the mechanism can predict the performance of F–T fuel combustion in engine accurately.

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Experimental Study of Injection Parameters on the Performance of a Diesel Engine with Fischer–Tropsch Fuel Synthesized from Coal

Cited by 13 publications

References 26 publications

Energy-Saving and Pollution-Reduction Potential Analysis for Diesel Engines Fueled with Fischer–Tropsch Fuel

Energy-Saving and Pollution-Reduction Potential Analysis for Diesel Engines Fueled with Fischer–Tropsch Fuel

Optimization of a Multiple Injection System in a Marine Diesel Engine through a Multiple-Criteria Decision-Making Approach

Establishment and Validation of a Two-Component Surrogate Fuel Chemical Kinetic Skeletal Model for Fischer–Tropsch Fuel Synthesized from Coal

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