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Radiation energy devaluation in diffusion combusting flows of natural gas

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  • Makhanlall, Deodat
  • Munda, Josiah L.
  • Jiang, Peixue

Abstract

CFD (Computational fluid dynamics) is used to evaluate the thermodynamic second-law effects of thermal radiation in turbulent diffusion natural gas flames. Radiative heat transfer processes in gas and at solid walls are identified as important causes of energy devaluation in the combusting flows. The thermodynamic role of thermal radiation cannot be neglected when compared to that of heat conduction and convection, mass diffusion, chemical reactions, and viscous dissipation. An energy devaluation number is also defined, with which the optimum fuel–air equivalence for combusting flows can be determined. The optimum fuel–air equivalence ratio for a natural gas flame is determined to be 0.7. The CFD model is validated against experimental measurements.

Suggested Citation

  • Makhanlall, Deodat & Munda, Josiah L. & Jiang, Peixue, 2013. "Radiation energy devaluation in diffusion combusting flows of natural gas," Energy, Elsevier, vol. 61(C), pages 657-663.
    • Handle: RePEc:eee:energy:v:61:y:2013:i:c:p:657-663
    DOI: 10.1016/j.energy.2013.09.026
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    References listed on IDEAS

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    1. Makhanlall, D. & Liu, L.H. & Zhang, H.C., 2010. "SLA (Second-law analysis) of transient radiative transfer processes," Energy, Elsevier, vol. 35(12), pages 5151-5160.
    2. Agudelo, Andrés & Cortés, Cristóbal, 2010. "Thermal radiation and the second law," Energy, Elsevier, vol. 35(2), pages 679-691.
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    Cited by:

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    2. Li, Bo & Wan, Huaxian & Gao, Zihe & Ji, Jie, 2019. "Experimental study on the characteristics of flame merging and tilt angle from twin propane burners under cross wind," Energy, Elsevier, vol. 174(C), pages 1200-1209.
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    4. Ji, Jie & Gong, Changzhi & Wan, Huaxian & Gao, Zihe & Ding, Long, 2019. "Prediction of thermal radiation received by vertical targets based on two-dimensional flame shape from rectangular n-heptane pool fires with different aspect ratios," Energy, Elsevier, vol. 185(C), pages 644-652.
    5. Deng, Lei & Tang, Fei & Wang, Xinkai, 2021. "Uncontrollable combustion characteristics of energy storage oil pool: Modelling of mass loss rate and flame merging time of annular pools," Energy, Elsevier, vol. 224(C).
    6. 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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