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Research Papers: Energy From Biomass

On Diluted-Fuel Combustion Issues in Burning Biogas Surrogates

[+] Author and Article Information
David A. Wilson

Duke Energy, Oconee Nuclear Station, 7800 Rochester Highway, ON03MS Seneca, SC 29672

Kevin M. Lyons1

Department of Mechanical and Aerospace Engineering, North Carolina State University, Box 7910, Raleigh, NC 27695-7910lyons@eos.ncsu.edu

1

Corresponding author.

J. Energy Resour. Technol 131(4), 041802 (Nov 18, 2009) (9 pages) doi:10.1115/1.4000152 History: Received February 06, 2007; Revised July 25, 2009; Published November 18, 2009; Online November 18, 2009

This paper describes an analysis of the burning velocity of pure and diluted fuels, with implications for the development and operation of biogas-fueled combustors. Background work in the area of flame stabilization and propagation are introduced from the combustion literature. Fuels examined in this paper were methane and ethylene; the diluents were primarily nitrogen, as well as argon, carbon dioxide, and helium. Trends in terms of burning velocities as functions of equivalence ratio are reported for a variety of fuels. Additionally, flame temperatures and associated burning velocities as a function of diluent composition are reported. Implications for several flame stabilization theories are discussed, as well as point to potential issues in converting combustors to accept biogas as a fuel permitting stable operation.

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Copyright © 2009 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Modeled and published burning velocities for ethylene and methane

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Figure 2

Ethylene burning velocity versus equivalence ratio for various nitrogen mole numbers

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Figure 3

Methane burning velocity versus equivalence ratio for various nitrogen mole numbers

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Figure 4

Ethylene flame temperature versus equivalence ratio for various nitrogen mole numbers

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Figure 5

Methane flame temperature versus equivalence ratio for various nitrogen mole numbers

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Figure 6

Ethylene burning velocity versus flame temperature for various nitrogen mole numbers. The points at the lowest temperature are at low equivalence ratios (lean conditions), indicated by the solid lines.

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Figure 7

Methane burning velocity versus flame temperature for various nitrogen mole numbers. The points at the lowest temperature are at low equivalence ratios (lean conditions), indicated by the solid lines.

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Figure 8

Stoichiometric ethylene burning velocity versus diluent reactant mole fraction for various diluents

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Figure 9

Stoichiometric ethylene burning velocity versus flame temperature for various diluents

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Figure 10

Stoichiometric flame temperature versus diluent reactant mole fraction for various diluents

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