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The Effect of Inert Fuel Compounds on Flame Characteristics

Author

Listed:
  • Igor Hudák

    (Institute of Process Engineering, Brno University of Technology, Technická 2896/2, 616 69 Brno, Czech Republic)

  • Pavel Skryja

    (Institute of Process Engineering, Brno University of Technology, Technická 2896/2, 616 69 Brno, Czech Republic)

  • Jiří Bojanovský

    (Institute of Process Engineering, Brno University of Technology, Technická 2896/2, 616 69 Brno, Czech Republic)

  • Zdeněk Jegla

    (Institute of Process Engineering, Brno University of Technology, Technická 2896/2, 616 69 Brno, Czech Republic)

  • Martin Krňávek

    (Eveco Brno, s.r.o., Hudcova 76d, 621 00 Brno-Medlánky, Czech Republic)

Abstract

To describe the effects of inert compounds in gaseous fuel, experiments on three different process burners (staged fuel burner, staged air burner, and low-calorific burner) were carried out. The tested burners are commercially available, but they were specially designed for experimental usage. Tests were carried out in the semi-industrial burner testing facility to investigate the influence of inert gases on the flame characteristics, emissions, and heat flux to the combustion chamber wall. Natural gas was used as a reference fuel, and, during all tests, thermal power of 500 kW was maintained. To simulate the combustion of alternative fuels with lower LHV, N 2 and CO 2 were used as diluents. The inert gas in the hydrocarbon fuel at certain conditions can lower NO x emissions (up to 80%) and increase heat flux (up to 5%). Once incombustible compounds are present in the fuel, the higher amount of fuel flowing through nozzles affects the flow in the combustion chamber by increasing the Reynolds number. This can change the flame pattern and temperature field, and it can be both positive and negative, depending on actual conditions.

Suggested Citation

  • Igor Hudák & Pavel Skryja & Jiří Bojanovský & Zdeněk Jegla & Martin Krňávek, 2021. "The Effect of Inert Fuel Compounds on Flame Characteristics," Energies, MDPI, vol. 15(1), pages 1-18, December.
    • Handle: RePEc:gam:jeners:v:15:y:2021:i:1:p:262-:d:715224
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    References listed on IDEAS

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    1. Zabed, Hossain M. & Akter, Suely & Yun, Junhua & Zhang, Guoyan & Zhang, Yufei & Qi, Xianghui, 2020. "Biogas from microalgae: Technologies, challenges and opportunities," Renewable and Sustainable Energy Reviews, Elsevier, vol. 117(C).
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