Paradigm analysis of performance and exhaust emissions in CRDI engine powered with hydrogen and Hydrogen/CNG fuels: A green fuel approach under different injection strategies

Vadlamudi, Srikanth; Gugulothu, Santhosh Kumar; Panda, Jibitesh Kumar; Kumar, Pragati

doi:10.1016/j.ijhydene.2022.08.277

Cited by 11 publications

(2 citation statements)

References 79 publications

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“…As shown in Figure , the torque, NGSR, DIP, and DIT had the same effects on the CA50, BSFC, BTE, CO, CO 2 , THC, NO x , and soot at different speeds. − For determining the combustion characteristics of the engine, the DIT is an important factor. However, for the fuel economy, the NGSR and DIP are relatively unimportant, and for the emission characteristics, the DIT exerts a small impact …”

Section: Gpr-fnn Modelmentioning

confidence: 99%

Prediction and Verification of Performance and Emission Characteristics of Diesel/Natural Gas Dual-Fuel Engine Based on Intelligent Algorithm

Wan

Huang

et al. 2023

ACS Omega

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With the development of computer application technologies, intelligent algorithm has been widely used in various fields. In this study, a coupled Gaussian process regression and feedback neural network (GPR-FNN) algorithm is proposed, and it is used to predict the performance and emission characteristics of a six-cylinder heavy-duty diesel/natural gas (NG) dual-fuel engine. Using the engine speed, torque, NG substitution rate, diesel injection pressure, and injection timing as inputs, an GPR-FNN model is established to predict the crank angle corresponding to 50% heat release, brake-specific fuel consumption, brake thermal efficiency, and carbon monoxide, carbon dioxide, total unburned hydrocarbon, nitrogen oxides, and soot emissions. Subsequently, its performance is evaluated using experimental results. The results show that the regression correlation coefficients of all output parameters are greater than 0.99, and the mean absolute percentage error is less than 5.9%. In addition, a contour plot is used to compare the experimental results with the GPR-FNN prediction data in detail, and the results show that the prediction model has high accuracy. The results of this study can provide new ideas for the research on diesel/natural gas dual-fuel engines.

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Section: Gpr-fnn Modelmentioning

confidence: 99%

Prediction and Verification of Performance and Emission Characteristics of Diesel/Natural Gas Dual-Fuel Engine Based on Intelligent Algorithm

Wan

Huang

et al. 2023

ACS Omega

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“…The extent of ignition delay significantly affects the subsequent combustion state. On the other hand, excessively advanced fuel injection leads to a sharp increase in combustion pressure, causing diesel knocking and thermal stress, reducing the reliability and durability of the engine [13][14][15]. To improve combustion conditions at low loads, a variable injection timing (VIT) system is applied and used in ships, which advances the fuel injection timing compared to the normal setting [16].…”

Section: Introductionmentioning

confidence: 99%

Effect of Performance by Excessive Advanced Fuel Injection Timing on Marine Diesel Engine

Baek

Jung²,

Vuong

et al. 2023

Applied Sciences

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The injection timing of fuel in a diesel engine affects the combustion condition. Advanced fuel injection prolongs the ignition delay, positively impacting the increase in maximum combustion pressure and improving output. However, excessively advanced fuel injection can cause knocking. Moreover, premature ignition results in increased compression work when the maximum combustion pressure occurs before top dead center (TDC). This study aimed to diagnose and rectify starting failures, noise, and vibrations in a commercially operated ship engine by measuring the combustion pressure during low load operation. The target engine was a 4-stroke diesel, and the fuel injection system was mechanically controlled by a camshaft. The measured engine exhibited a 4.5 °CA error between the TDC, determined by the flywheel mark and the actual TDC. This discrepancy was influenced by excessively advanced fuel injection timing. It was confirmed that fuel injection and ignition were excessively advanced in all cylinders. After readjusting the engine by delaying the fuel injection timing by approximately 10 °CA, the combustion pressure was remeasured. The ignition was delayed by approximately 6.5 °CA at the same load, and the ignition intervals were uniformly adjusted. As the ignition timing was retarded, the compression work decreased and the expansion work increased in each cylinder, resulting in improved output across all cylinders. The amplitude of crankshaft angular velocity variation significantly decreased, improving uneven rotational force.

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Optimizing diesel engines with oxyhydrogen dual fuel: Enhancing performance with green methyl ester using MCDM techniques

Ajay Goud,

Baba

2024

Heat Trans

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The current scenario of the automobile industry states the huge demand and necessity of hydrogen production as well as its storage. An alternative to hydrogen that is widely introduced in recent times is oxyhydrogen gas, often abbreviated as HHO due to its ratio of hydrogen to oxygen (2:1) content. HHO fuel can be extracted using the process of water electrolysis and is free of any carbon content, thus making it a clean fuel. In this present work, two types of fuels are used for carrying out the analysis of a diesel engine. The first one being used is HHO, while the second one is either pure diesel or a mixture of diesel (80%) and Jatropha methyl ester (20%). The study suggested that 20% Jatropha methyl ester (JME20) with HHO reduces the amount of smoke from emission, carbon monoxide (CO) content, and unburnt hydrocarbon (HC) while having an increase of parameters, such as NOx emissions. The desirability approach was implemented in this study to identify the optimal solution out of different combinations. The optimal solution in this study was recorded as Opt.JME20 + HHO fuel at 50% load condition. It has the maximum desirability score of 0.91 and provided the advantages of higher brake thermal efficiency by 1.25%, lower smoke, UHC, and CO emissions by 22.22%, 25%, and 27.27%, respectively, in comparison to the scores of respective parameters in baseline diesel operation.

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Paradigm analysis of performance and exhaust emissions in CRDI engine powered with hydrogen and Hydrogen/CNG fuels: A green fuel approach under different injection strategies

Cited by 11 publications

References 79 publications

Prediction and Verification of Performance and Emission Characteristics of Diesel/Natural Gas Dual-Fuel Engine Based on Intelligent Algorithm

Prediction and Verification of Performance and Emission Characteristics of Diesel/Natural Gas Dual-Fuel Engine Based on Intelligent Algorithm

Effect of Performance by Excessive Advanced Fuel Injection Timing on Marine Diesel Engine

Optimizing diesel engines with oxyhydrogen dual fuel: Enhancing performance with green methyl ester using MCDM techniques

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