Second law analysis of hydrogen–air combustion in a spark ignition engine

Ismail, Saleel; Mehta, Pramod S.

doi:10.1016/j.ijhydene.2010.10.022

Cited by 22 publications

(8 citation statements)

References 39 publications

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“…10,11 Also, flue gas recirculation in gas turbine power plants is applied, and their effects were shown. 31,32 Also, the effect of different biodiesels, 33 the addition of H 2 into the fuel, and Ar/N 2 / CO 2 concentrations 34 on conventional air combustion using exergy analysis method are examined. 14 However, almost in all of these thermodynamic analyses are based on energy balance.…”

Section: Discussionmentioning

confidence: 99%

“…The above equation can be solved by the same procedure given for Equation (29) to (32). The results obtained are used in Equation (43) for calculating the specific heats of combustion products.…”

Section: Theoretical Model For the Equilibrium Combustion And Thermmentioning

confidence: 99%

“…[26][27][28][29] On the other hand, both in combustion engines 30 and gas turbines, detailed characteristics of combustion taking place in combustion chambers are presented in the studies, including Computational Fluid Dynamics (CFD) analysis and numerical studies. 31,32 Also, the effect of different biodiesels, 33 the addition of H 2 into the fuel, and Ar/N 2 / CO 2 concentrations 34 on conventional air combustion using exergy analysis method are examined. 35,36 In this work, thermodynamic analysis complementary to the unstudied parts of the literature surveyed with exergy and chemical aspects are performed.…”

Section: Introductionmentioning

confidence: 99%

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Effect of varying fuel types on oxy‐combustion performance

Ozsari

Üst

2019

Int J Energy Res

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Summary In search for clean energy solutions in a global warming era, oxy‐fuel combustion systems are promising. In the study, combustion products are calculated, and exergy analysis is done using the proposed multifeature equilibrium combustion model. And the results obtained for oxy‐combustion of different fuels at various oxygen fractions are given in comparison with conventional combustion. For validation, the model results are compared with popular combustion calculation tools, GASEQ and CEA. Effect of oxygen content on oxy‐combustion exergy analysis is calculated, also considering changes in equivalence ratio and combustion chamber inlet temperature. Moreover, indicating parameters for combustion performance, temperature ratio, chemical exergy, physical exergy, total specific exergy, and exergy destruction are utilized in the calculations elaborately. Changes in combustion product mole fractions are explained for rich and lean combustion regions. And also, specific exergy results are presented. In terms of exergy destruction, oxy‐combustion is more advantageous than conventional combustion. It has been shown that exergy destruction in combustion process with conventional air is approximately 1.5 times higher compared with 21% oxy‐combustion, both at different equivalence ratios and at different combustion chamber inlet temperatures. Nowadays, environment‐friendly, clean energy production systems are growing in numbers. In this concept, exergetic analyses of combustion for different fuels and greener natural gas, compared with diesel, gasoline, and methanol, are given in comparison. Considering four fuel types, advantageous and disadvantageous cases are presented for oxy‐combustion at different oxygen fractions and conventional combustion. As a result, diesel fuel is more advantageous than the other three fuel types, in terms of temperature ratio and exergy. Natural gas combustion appears to be disadvantageous in terms of specific exergy and temperature ratio, but it is the most advantageous in terms of exergy destruction. Consequently, distinctive comparison is done for oxy‐combustion and conventional combustion, determining positive and negative effects for different fuels.

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Section: Discussionmentioning

confidence: 99%

Section: Theoretical Model For the Equilibrium Combustion And Thermmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of varying fuel types on oxy‐combustion performance

Ozsari

Üst

2019

Int J Energy Res

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“…A traditional first-law analysis that does not consider the quality of energy content of a system often fails to provide the best insight into the combustion process [1]. Therefore, to evaluate the inefficiencies of the combustion process, a second-law analysis should be applied [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Analysis of exergy loss of gasoline surrogate combustion process based on detailed chemical kinetics

Sun

Yan

et al. 2015

Applied Energy

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“…In their pioneering work, Dunbar and Lior 9 modelled the combustion subprocesses in an isobaric reactor as independent sequential events. Their approach has been extended 10 to a hydrogen-fuelled homogeneous charge spark ignition engine. The present work attempts a second-law analysis of the fuel-air mixing subprocesses in addition to those associated with combustion in a heterogeneous charge compression ignition engine.…”

Section: Introductionmentioning

confidence: 99%

Second-law analysis of fuel–air mixing and combustion subprocesses in a heterogeneous charge engine

Ismail

Mehta

2011

Proceedings of the Institution of Mechanical Engineers, Part D:

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Fuel-air mixing and combustion in engines are complex phenomena involving several subprocesses, wherein the availability (exergy) of the working fluid could be destroyed owing to irreversibilities or could be lost during energy exchanges. In the present work, a quasi-dimensional multi-zone engine model is used to quantify the availability destructions and losses associated with various mixing and combustion subprocesses in a heterogeneous charge compression ignition engine. This second-law analysis helps us to estimate the contributions of individual subprocesses towards the overall availability deficit. The results indicate that most of the availability destruction prior to ignition occurs because of fuel vaporization and mixing, whereas chemical reaction accounts for up to half of the total availability deficit during combustion. In-cylinder pressure equilibration and mixing of the combustion products with spray gases have major roles in availability destruction during the premixed combustion phase and the mixing-controlled combustion phase respectively. The contributions of wall heat transfer, heat transfer from the spray to the surrounding air and mixing of entrained air with spray gases assume significance in the later stages of combustion. Parametric studies indicate that reducing the incylinder air swirl and retarding the injection timing effectively curtail the availability deficit, thus improving the exergetic efficiency.

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Second law analysis of hydrogen–air combustion in a spark ignition engine

Cited by 22 publications

References 39 publications

Effect of varying fuel types on oxy‐combustion performance

Effect of varying fuel types on oxy‐combustion performance

Analysis of exergy loss of gasoline surrogate combustion process based on detailed chemical kinetics

Second-law analysis of fuel–air mixing and combustion subprocesses in a heterogeneous charge engine

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