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A theoretical study of entropy generation of the combustion phenomenon in the porous medium burner

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  • Mohammadi, Iman
  • Ajam, Hossein

Abstract

In this paper, a symmetric two-dimensional numerical model for premixed methane-air combustion in a porous medium has been developed. For this purpose, multi-step mechanisms and variable porosity have been used and the effects of them on the entropy generation rate have been investigated. This model solves the continuity, Navier Stokes, the solid and gas energy, the chemical species transport equations and entropy generation rate equations by using the finite volume method and the pressure and velocity have been coupled with the SIMPLE algorithm. The results reveal that the entropy generation due to heat transfer has the highest contribution to entropy generation and after that are the chemical reactions, mass diffusion, and friction respectively. When used from porosity variation the entropy generation rate due to heat transfer, chemical reaction and friction are reduced and for the entropy generation due to mass diffusion is vice versa.

Suggested Citation

  • 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).
    • Handle: RePEc:eee:energy:v:188:y:2019:i:c:s0360544219316986
    DOI: 10.1016/j.energy.2019.116004
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    References listed on IDEAS

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    1. 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.
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    3. Mujeebu, M. Abdul & Abdullah, M.Z. & Mohamad, A.A., 2011. "Development of energy efficient porous medium burners on surface and submerged combustion modes," Energy, Elsevier, vol. 36(8), pages 5132-5139.
    4. Arjmandi, H.R. & Amani, E., 2015. "A numerical investigation of the entropy generation in and thermodynamic optimization of a combustion chamber," Energy, Elsevier, vol. 81(C), pages 706-718.
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    2. Peng, Qingguo & Xie, Bo & Yang, Wenming & Tang, Shihao & Li, Zhenwei & Zhou, Peng & Luo, Ningkang, 2021. "Effects of porosity and multilayers of porous medium on the hydrogen-fueled combustion and micro-thermophotovoltaic," Renewable Energy, Elsevier, vol. 174(C), pages 391-402.
    3. Peng, Qingguo & Shi, Zhiwei & Xie, Bo & Huang, Zhixin & Tang, Shihao & Li, Xianhua & Huang, Haisong & E, Jiaqiang, 2023. "Optimisation of a micro-thermophotovoltaic with porous media inserted burner for electrical power improvement," Renewable Energy, Elsevier, vol. 215(C).
    4. Senda Agrebi & Louis Dreßler & Hendrik Nicolai & Florian Ries & Kaushal Nishad & Amsini Sadiki, 2021. "Analysis of Local Exergy Losses in Combustion Systems Using a Hybrid Filtered Eulerian Stochastic Field Coupled with Detailed Chemistry Tabulation: Cases of Flames D and E," Energies, MDPI, vol. 14(19), pages 1-21, October.

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