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A Mathematical Model of Biomass Combustion Physical and Chemical Processes

Author

Listed:
  • Florin Popescu

    (Faculty of Engineering, “Dunarea de Jos” University of Galati, 800008 Galat, Romania)

  • Razvan Mahu

    (Faculty of Engineering, “Dunarea de Jos” University of Galati, 800008 Galat, Romania)

  • Ion V. Ion

    (Faculty of Engineering, “Dunarea de Jos” University of Galati, 800008 Galat, Romania)

  • Eugen Rusu

    (Faculty of Engineering, “Dunarea de Jos” University of Galati, 800008 Galat, Romania)

Abstract

The numerical simulation of biomass combustion requires a model that must contain, on one hand, sub-models for biomass conversion to primary products, which involves calculations for heat transfer, biomass decomposition rate, product fractions, chemical composition, and material properties, and on the other hand, sub-models for volatile products transport inside and outside of the biomass particle, their combustion, and the char reduction/oxidation. Creating such a complete mathematical model is particularly challenging; therefore, the present study proposes a versatile alternative—an originally formulated generalized 3D biomass decomposition model designed to be efficiently integrated with existing CFD technology. The biomass decomposition model provides the chemical composition and mixture fractions of volatile products and char at the cell level, while the heat transfer, species transport, and chemical reaction calculations are to be handled by the CFD software. The combustion model has two separate units: the static modeling that produces a macro function returning source/sink terms and local material properties, and the dynamic modeling that tightly couples the first unit output with the CFD environment independently of the initial biomass composition, using main component fractions as initial data. This article introduces the generalized 3D biomass decomposition model formulation and some aspects related to the CFD framework implementation, while the numerical modeling and testing shall be presented in a second article.

Suggested Citation

  • Florin Popescu & Razvan Mahu & Ion V. Ion & Eugen Rusu, 2020. "A Mathematical Model of Biomass Combustion Physical and Chemical Processes," Energies, MDPI, vol. 13(23), pages 1-36, November.
  • Handle: RePEc:gam:jeners:v:13:y:2020:i:23:p:6232-:d:451618
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    Citations

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    Cited by:

    1. Ion V. Ion & Florin Popescu & Razvan Mahu & Eugen Rusu, 2021. "A Numerical Model of Biomass Combustion Physical and Chemical Processes," Energies, MDPI, vol. 14(7), pages 1-19, April.
    2. Gabriel Talero & Yasuki Kansha, 2022. "Simulation of the Steam Gasification of Japanese Waste Wood in an Indirectly Heated Downdraft Reactor Using PRO/II™: Numerical Comparison of Stoichiometric and Kinetic Models," Energies, MDPI, vol. 15(12), pages 1-19, June.

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