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A numerical evaluation of combustion in porous media by EGM (Entropy Generation Minimization)

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  • Bidi, M.
  • Nobari, M.R.H.
  • Avval, M. Saffar

Abstract

Combustion in Porous Media provides interesting advantages compared with the free flame combustion due to the higher burning rates, increased power dynamic range, the extension of lean flammability limits, and the low emissions of pollutants. A numerical code is developed in order to evaluate the effects of different parameters of combustion in porous media. The governing equations including Navier–Stokes, the solid and gas energy and the chemical species transport equations are solved using a multi-step reduced kinetic mechanism. Flame stabilization and the burner optimization are studied by EGM (Entropy Generation Minimization) method considering the effects of chemical affinities and reaction. It is found that the flames occurring at the upstream half of the porous layer are more stable and more efficient, producing less emissions than those occur at the downstream half of porous layer. Also at a specified equivalence ratio both the heat recirculation efficiency and the Merit number have similar trend by changing the flame location. For a FFL (Fixed Flame Location), there is an optimum value of equivalence ratio at which the burner efficiency is a maximum.

Suggested Citation

  • Bidi, M. & Nobari, M.R.H. & Avval, M. Saffar, 2010. "A numerical evaluation of combustion in porous media by EGM (Entropy Generation Minimization)," Energy, Elsevier, vol. 35(8), pages 3483-3500.
  • Handle: RePEc:eee:energy:v:35:y:2010:i:8:p:3483-3500
    DOI: 10.1016/j.energy.2010.04.053
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    References listed on IDEAS

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    1. Rakopoulos, C.D. & Michos, C.N. & Giakoumis, E.G., 2008. "Availability analysis of a syngas fueled spark ignition engine using a multi-zone combustion model," Energy, Elsevier, vol. 33(9), pages 1378-1398.
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    Cited by:

    1. Safari, Mehdi & Sheikhi, M. Reza H., 2014. "Large eddy simulation-based analysis of entropy generation in a turbulent nonpremixed flame," Energy, Elsevier, vol. 78(C), pages 451-457.
    2. Sciacovelli, A. & Verda, V. & Sciubba, E., 2015. "Entropy generation analysis as a design tool—A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 43(C), pages 1167-1181.
    3. Adrian Bejan & George Tsatsaronis, 2021. "Purpose in Thermodynamics," Energies, MDPI, vol. 14(2), pages 1-25, January.
    4. Xu, Mingtian, 2012. "Variational principles in terms of entransy for heat transfer," Energy, Elsevier, vol. 44(1), pages 973-977.
    5. Asinari, Pietro & Chiavazzo, Eliodoro, 2014. "The notion of energy through multiple scales: From a molecular level to fluid flows and beyond," Energy, Elsevier, vol. 68(C), pages 870-876.
    6. Guo, Zhihao & Deng, Shuai & Zhu, Yu & Zhao, Li & Yuan, Xiangzhou & Li, Shuangjun & Chen, Lijin, 2020. "Non-equilibrium thermodynamic analysis of adsorption carbon capture: Contributors, mechanisms and verification of entropy generation," Energy, Elsevier, vol. 208(C).
    7. Murtada A. Elhaj & Syed A. Imtiaz & Greg F. Naterer & Sohrab Zendehboudi, 2023. "Entropy Generation Minimization of Two-Phase Flow Irreversibilities in Hydrocarbon Reservoirs," Energies, MDPI, vol. 16(10), pages 1-20, May.
    8. Wang, Hongmin & Wei, Chunzhi & Zhao, Pinghui & Ye, Taohong, 2014. "Experimental study on temperature variation in a porous inert media burner for premixed methane air combustion," Energy, Elsevier, vol. 72(C), pages 195-200.
    9. Mohammadi, Iman & Ajam, Hossein, 2019. "A theoretical study of entropy generation of the combustion phenomenon in the porous medium burner," Energy, Elsevier, vol. 188(C).
    10. Pahlevaninezhad, Masoud & Davazdah Emami, Mohsen & Panjepour, Masoud, 2014. "The effects of kinetic parameters on combustion characteristics in a sintering bed," Energy, Elsevier, vol. 73(C), pages 160-176.
    11. Kaluri, Ram Satish & Basak, Tanmay, 2011. "Entropy generation due to natural convection in discretely heated porous square cavities," Energy, Elsevier, vol. 36(8), pages 5065-5080.

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