Effect of methane augmentations on engine performance and emissions

Tripathi, Gaurav; Sharma, Priybrat; Dhar, Atul

doi:10.1016/j.aej.2020.01.012

Cited by 20 publications

(9 citation statements)

References 32 publications

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“…i.e., W(s i ) is a matrix with positive definite and symmetric characteristics. From Lemma 1, closed-loop system (3), (7), and (11) are mean-square stable.…”

Section: Stability Analysismentioning

confidence: 94%

“…where ε(s i ) > 0 is a design parameter. Based on (4), (7), and (8), the difference of ( 9) can be calculated as…”

Section: Controller Designmentioning

confidence: 99%

“…Theorem 1. For every initial value (y(0), λ d (0)) T , initial distribution σ(0) of the residual gas fraction, and fluctuation of the mass of fresh air ΔM an (k), closed-loop system (3), (7), and ( 11) are mean-square stable.…”

Section: Stability Analysismentioning

confidence: 99%

“…e methane energy was used to supplement the diesel power in a certain percentage in [7] to release the relationship between the increase in methane and the emissions and performance of a dual-fuelled engine. Biogas with two different methane concentrations was applied to evaluate the emissions and performance of a miniature biogas-fuelled Otto cycle engine with one cylinder in [8] with consideration of the ratio of compression and crown geometry of the piston.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Model-Based Stochastic Adaptive Air-Fuel Ratio Control of Direct Injection Biogas-Fuelled Engines

Yang

Jian

et al. 2020

Mathematical Problems in Engineering

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The problem of stochastic adaptive air-fuel ratio control by the dynamic model of biogas-fuelled engines is investigated in this paper. An adaptive law is employed to estimate the theoretical air-fuel ratio, which is undetermined due to the uncertainty of the methane concentration in the biogas. A stochastic adaptive air-fuel ratio controller in consideration of the stochasticity of the residual gas is designed based on the adaptive law, and the closed-loop system is proven to be mean-square stable. The proposed stochastic adaptive air-fuel ratio controller is validated through a numerical simulation when the theoretical air-fuel ratio is unknown constants and jump signals.

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“…i.e., W(s i ) is a matrix with positive definite and symmetric characteristics. From Lemma 1, closed-loop system (3), (7), and (11) are mean-square stable.…”

Section: Stability Analysismentioning

confidence: 94%

“…where ε(s i ) > 0 is a design parameter. Based on (4), (7), and (8), the difference of ( 9) can be calculated as…”

Section: Controller Designmentioning

confidence: 99%

Section: Stability Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Model-Based Stochastic Adaptive Air-Fuel Ratio Control of Direct Injection Biogas-Fuelled Engines

Yang

Jian

et al. 2020

Mathematical Problems in Engineering

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“…The methane (CH 4 ) and natural gas are among the most promising fuels for power plants in the energy and transport industries. This is a consequence of the high-energy capacity and manufacturability of CH 4 , its relatively low cost, the availability of a large amount of raw stock and the possibility of minimizing environmental pollution in comparison with other hydrocarbon fuels [1][2][3]. In the methane combustion products, a high ratio of the water vapor mass fraction to the carbon dioxide mass fraction gH 2 O/gCO 2 is realized.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Methane Combustion Efficiency in a High-Enthalpy Oxygen-Containing Flow

2022

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The article presents the experimental study analysis results of the methane combustion efficiency in a high-enthalpy oxygen-containing flow (HOF) inside of constant cross-section channel, finite along the length. The range of initial HOF enthalpies was considered from 350 to 700 kJ/kg. The regularities of the HOF initial enthalpy influence on the methane combustion efficiency were obtained. The values of the fuel excess coefficient under which the maximum coefficients of methane combustion completeness in the HOF are realized were determined. The data obtained indicate the realization of transitional diffusion-kinetic modes of methane combustion and make it possible to assess the factors limiting the combustion process.

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