Hydrogen addition to a commercial self-aspirating burner and assessment of a practical burner modification strategy to improve performance
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(Published version)
Date
2024
Authors
Gee, A.J.
Proud, D.B.
Smith, N.
Chinnici, A.
Medwell, P.R.
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Journal article
Citation
International Journal of Hydrogen Energy, 2024; 49(B):59-76
Statement of Responsibility
Adam J. Gee, Douglas B. Proud, Neil Smith, Alfonso Chinnici, Paul R. Medwell
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Abstract
The ability for existing burners to operate safely and efficiently on hydrogen-blended fuels is a primary concern for the many industries looking to adopt hydrogen as an alternative fuel. This study investigates the efficacy of increasing fuel injector diameter as a simple modification strategy to extend the hydrogen-blending limits before flashback. The collateral effects of this modification are quantified with respect to a set of key performance criteria. The results show that the unmodified burner can sustain up to 50 vol% hydrogen addition before flashback. Increasing the fuel injector diameter reduces primary aeration, allowing for stable operation on up to 100% hydrogen. The flame length, visibility and radiant heat transfer properties are all increased as a result of the reduced air entrainment with a trade-off reported for NOx emissions, where, in addition to the effects of hydrogen, reducing air entrainment further increases NOx emissions.
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Available online 5 July 2023
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© 2023 The Authors. Published by Elsevier Ltd on behalf of Hydrogen Energy Publications LLC. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).