Experimental analysis of oxygen-methane combustion inside a gas turbine reactor under various operating conditions

Habib, Mohamed A.; Nemitallah, Medhat A.; Ahmed, Pervez; Sharqawy, Mostafa H.; Badr, H. M.; Inam, Muhammad; Yaqub, Mohamed

doi:10.1016/j.energy.2015.03.120

Cited by 43 publications

(13 citation statements)

References 37 publications

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“…In short, the oxygen enriched combustion plant is comprised of three major sections, which are (1) processing of air through polymeric membrane to induce air with concentrated oxygen, (2) combustion in a Gibbs reactor using natural gas and oxygen enriched air, whereby Aspen HYSYS will predicatively calculate the resulting product distribution that honors the material and energy balances as well as any chemical equilibrium limitations, depending upon operating and feed conditions in the combustion reactor based on the intrinsic thermodynamic database and (3) Rankine steam cycle consisted of steam side with steam turbine, steam condenser, condensate pump, and steam side of a boiler in order to quantify quality of the heat produced from combustion. Details of the simulation condition can be found in our previous work and have been summarized in Table .…”

Section: Methodsmentioning

confidence: 99%

“…Oxygen enriched combustion has become one of the most attractive combustion technologies over the last decade . An increment of oxygen content in the combustion air can increase heating system efficiency, minimize emission of environmental pollutants through reduction in natural gas usage and optimize heat utilization via decrement in nitrogen constituent that carries essentially no heating value . To date, the techniques that have dominated O 2 / N 2 gas separation in an industrial scale are cryogenic distillation and pressure swing absorption, which pose a problem of extensive energy requirement that further increases their operating cost .…”

Section: Introductionmentioning

confidence: 99%

“…1 An increment of oxygen content in the combustion air can increase heating system efficiency, minimize emission of environmental pollutants through reduction in natural gas usage and optimize heat utilization via decrement in nitrogen constituent that carries essentially no heating value. 2 To date, the techniques that have dominated O 2 / N 2 gas separation in an industrial scale are cryogenic distillation and pressure swing absorption, which pose a problem of extensive energy requirement that further increases their operating cost. 3 In this context, less energy intensive air separation techniques are necessary for application aimed to generate energy since the opposite indicates that the purpose of the plant has been defeated.…”

Section: Introductionmentioning

confidence: 99%

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Process simulation and optimization of oxygen enriched combustion using thin polymeric membranes: effect of thickness and temperature dependent physical aging

Lock

Lau

Shariff

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND Limited work has been available to model thickness and temperature dependent physical aging encountered in polymeric membranes for gas separation to provide physically intuitive interpretation underlying the process. The Tait equation of states has been integrated within conventional dual mode mathematical model to characterize the physical aging mechanism, whereby the model requires merely temperature dependent parameters. Subsequently, the Tait‐dual mode mechanism model has been incorporated within a succession of states methodology that quantifies transport mechanism in a countercurrent hollow fiber membrane. Finally, the developed mathematical model has been implemented in Aspen HYSYS to constitute an oxygen enrichment plant. RESULTS The simulation model has been validated with experimental observation with an acceptable error of < 6.5%. The process simulation tool has been used to evaluate the separation performance of oxygen enrichment plant using polymeric membrane with consideration of operating temperature (35–55 °C) and thickness dependent (400–1000 nm) physical aging. It is found that the optimal membrane design that generates highest profitability with physical aging consideration is at film thickness of ∼400 nm and operating temperature of 55 °C. Under such operating condition, the deviation between ideal and non‐ideal simulation model is also the smallest at ∼6%, which implies that physical aging has the least impact to the operability of the plant. CONCLUSION The developed simulation model has the potential to be applied for complex membrane system design (multiple membranes or hybrid system), scale up and optimization study that is essentially required for industrial scale application. © 2019 Society of Chemical Industry

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Process simulation and optimization of oxygen enriched combustion using thin polymeric membranes: effect of thickness and temperature dependent physical aging

Lock

Lau

Shariff

et al. 2019

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

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“…The Reynoldsaveraged Navier-Stokes formulation is based on ensemble averaging and closure problem. The density-weighted averaging or the so-called Favre-averaging [11] is considered where the symbol '~' denotes a density weighted ensemble average. The Favre-averaged continuity, momentum, energy and species equations are expressed as follows:…”

Section: Constitutive Equationsmentioning

confidence: 99%

Study of Instabilities on Laminar-Turbulent Transition in a 4 Lug-Bolt in a Confined Diffusion Flame

Cruz¹,

Martínez-Espinosa²,

Polupan³

2016

International Conference of Fluid Flow, Heat and Mass Transfer

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Velocity fluctuation in a diffusion methane-oxygen flame for three different injection velocities is analyzed numerically in this paper. The work states a 4 Lug-Bolt arrange where oxygen is injected by a central nozzle and methane by four peripheral nozzles. The aim of the numerical simulation is to study the mechanism that affect the mixture process in a diffusion flame by means of Kelvin-Helmholtz instabilities. The simulation is realized with the Reynolds-Averaged Navier-Stokes technique and the realizable k-ɛ turbulence model is considered in order to model the Reynolds stress tensor. The results show a recirculation zone which is the essential mixture mechanism and has relevant participation on the instabilities development in confined diffusion flames. Furthermore, predictions exhibit a wave frequency increment and wave length instability decrement as velocity injection increase. Therefore, in diffusion flames the Kelvin-Helmholtz instability affects the mixing and reaction zone.

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“…An oxygen-methane diffusion flame in a gas turbine combustor was experimentally investigated under various operating conditions. The flame stabilization mechanism was investigated, and it was observed that both the flame and fuel-gas temperatures decreased with an increasing equivalence ratio (Habib et al 2015). In terms of large eddy simulations, a methane-reacting flow was simulated in an industrial gas turbine combustor that was operated at a pressure of 3bar.…”

Section: Introductionmentioning

confidence: 99%

Design and Numerical Simulation of a Micro-Gas Turbine Combustor

Zhang

Liu

et al. 2019

JAFM

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A cannular combustor with a 100-KW thermal power was designed with a swirler, primary holes, dilution holes, and cooling holes based on an original gas turbine of a practical application. Further, the combustion process in this combustor was numerically simulated by using Computational Fluid Dynamics (CFD). A methane-reduced chemical mechanism was applied to CFD to simulate the combustion process. The combustion performance, product concentrations, and flow field were analyzed. Experimental data of airflow distribution obtained in previous study were applied in the design process. The present work was reported to verify that the experimental data can be regarded as a guide and optimization basis in the aerodynamic design process. Additionally, the consistency of numerical results and design data indicates that the design in this paper could satisfy the design requirements.

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Experimental analysis of oxygen-methane combustion inside a gas turbine reactor under various operating conditions

Cited by 43 publications

References 37 publications

Process simulation and optimization of oxygen enriched combustion using thin polymeric membranes: effect of thickness and temperature dependent physical aging

Process simulation and optimization of oxygen enriched combustion using thin polymeric membranes: effect of thickness and temperature dependent physical aging

Study of Instabilities on Laminar-Turbulent Transition in a 4 Lug-Bolt in a Confined Diffusion Flame

Design and Numerical Simulation of a Micro-Gas Turbine Combustor

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