Experimental study of hydrogen enriched compressed natural gas (HCNG) engine and application of support vector machine (SVM) on prediction of engine performance at specific condition

Duan, Hao; Mehra, Roopesh Kumar; Luo, Shuyi; Nie, Zhibin; Ren, Xiaohui; Ma, Fenglong

doi:10.1016/j.ijhydene.2019.04.039

Cited by 59 publications

(21 citation statements)

References 31 publications

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“…The optimal values which have the best desirability for our model are shown in Table 4. As a comparison, Hao et al 17 experimentally studied different fuel blends of hydrogen addition to the CNG engine and concluded that the best performance achieved near HCNG of 20%. Similarly, Alrazen et al 19 found that the highest thermal efficiency of engine obtained around HCNG of 25%–30%.…”

Section: Resultsmentioning

confidence: 99%

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Numerical study of hydrogen addition on the performance and emission characteristics of compressed natural gas spark-ignition engine using response surface methodology and multi-objective desirability approach

Boodaghi

Etghani

Sedighi

2020

International Journal of Engine Research

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Today, the demand for higher output efficiencies, lower fuel consumption, and ever reduced emissions has been rising. Due to its availability, one promising alternative is the applying of hydrogen in internal combustion engines. In this study, the initial efforts concentrated on combine relationships of input and output parameters of hydrogen compressed natural gas spark-ignition engine. The quadratic regression models were conducted for all six responses: torque, carbon monoxide, brake-specific fuel consumption, methane, nitrogen oxides, and total hydrocarbon through response surface methodology and tested for adequacy by analysis of variance. The multi-objective desirability approach employed for the optimization of input variables, namely, the hydrogen compressed natural gas ratio, excess air ratio ( λ), and ignition timing ( θi). Also, two factors, that is, manifold absolute pressure and engine speed, were fixed at 105 kPa and 1600 r/min, respectively. Results indicate that the optimal independent input factors are equal to λ of 1.178, hydrogen compressed natural gas ratio of 25.98%, and θi of 18 °CA before top dead center. Also, the optimal combination of responses is as follows: brake-specific fuel consumption of 219.334 g/kWh, the torque of 395 N m, 30.189 g/kWh for nitrogen oxides, carbon monoxide equal to 5.093 g/kWh, total hydrocarbon of 0.633 g/kWh, and 0.572 g/kWh for methane. This study provided the significance of response surface methodology as an attractive technique for investigators for modeling. In this regard, the response surface methodology modeling and multi-objective desirability approach can be utilized to predict the emission and performance characteristics of the hydrogen compressed natural gas engines minutely.

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Section: Resultsmentioning

confidence: 99%

“…Hao et al 17 studied the combustion and emission characteristics of HCNG on the CNG engine. Three different fuel blends (0%, 20%, and 40%) were selected for the experiments.…”

Section: Introductionmentioning

confidence: 99%

Numerical study of hydrogen addition on the performance and emission characteristics of compressed natural gas spark-ignition engine using response surface methodology and multi-objective desirability approach

Boodaghi

Etghani

Sedighi

2020

International Journal of Engine Research

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“…4 (i, k, m, n), the maximum amount of HC at different engine speeds for EGR is about 0% and HCNG is about 40%. Reducing CO and HC emissions by increasing hydrogen is due to complete combustion so that with the increase of hydrogen in the fuel composition, it is possible to increase the temperature and also the higher pressure, and as a result, fewer emissions and more power [56].…”

Section: Resultsmentioning

confidence: 99%

The effect of EGR and hydrogen addition to natural gas on performance and exhaust emissions in a diesel engine by AVL fire multi-domain simulation, GPR model, and multi-objective genetic algorithm

Zareei

Abbas

Álvarez

2022

International Journal of Hydrogen Energy

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“…Some scholars have conducted relevant experiments and simulation studies on HCNG-fueled spark ignition engines, and results show that CO 2 and HC emissions are declined because hydrogen does not contain carbon, and the quenching distance of hydrogen is short [8][9][10]. The intermediate formaldehyde emission is rapidly consumed due to the increased activity of O and OH groups after hydrogen was added [11,12]. At the same time, however, on account of the increase of mixed combustion rate, the maximum temperature increases and thereby leading to the increase of NO x emission [13].…”

Section: Introductionmentioning

confidence: 99%

Effect of Negative Valve Overlap on Combustion and Emissions of CNG-Fueled HCCI Engine with Hydrogen Addition

Zhang

Liu

et al. 2021

International Journal of Aerospace Engineering

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In order to study the effect of negative valve overlap on combustion and emission characteristics of a homogeneous charge compression ignition engine fueled with natural gas and hydrogen, the test and the simulation were conducted using an engine cycle model coupling the chemical kinetic reaction mechanism under different valve timing conditions. Results show that the internal EGR formed by using negative valve overlap could heat the inlet mixtures and improve the spontaneous ignition characteristic of the engine. The residual exhaust gas could slow down the heat release rate, decrease the pressure rise rate and the maximum combustion temperature, and reduce the NOx emission simultaneously. Among the three NVO schemes, the strategy of changing the intake valve opening timing individually can create the least power loss, and the symmetric NVO strategy which changes both the exhaust valve closing timing and the intake valve opening timing simultaneously can achieve the best heating effect of inlet mixtures and the satisfactory decrease of combustion temperature, as well as the largest reduction of NOx emission.

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Experimental study of hydrogen enriched compressed natural gas (HCNG) engine and application of support vector machine (SVM) on prediction of engine performance at specific condition

Cited by 59 publications

References 31 publications

Numerical study of hydrogen addition on the performance and emission characteristics of compressed natural gas spark-ignition engine using response surface methodology and multi-objective desirability approach

Numerical study of hydrogen addition on the performance and emission characteristics of compressed natural gas spark-ignition engine using response surface methodology and multi-objective desirability approach

The effect of EGR and hydrogen addition to natural gas on performance and exhaust emissions in a diesel engine by AVL fire multi-domain simulation, GPR model, and multi-objective genetic algorithm

Effect of Negative Valve Overlap on Combustion and Emissions of CNG-Fueled HCCI Engine with Hydrogen Addition

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