dc.contributor.author | López Ruiz, Gontzal | |
dc.contributor.author | Alava Pérez, Isabel | |
dc.contributor.author | Urresti, Iker | |
dc.contributor.author | Blanco Ilzarbe, Jesús María | |
dc.contributor.author | Naud, Bertrand | |
dc.date.accessioned | 2024-10-16T18:01:52Z | |
dc.date.available | 2024-10-16T18:01:52Z | |
dc.date.issued | 2021-01-12 | |
dc.identifier.citation | Energy 221 : (2021) // Article ID 119768 | es_ES |
dc.identifier.issn | 1873-6785 | |
dc.identifier.uri | http://hdl.handle.net/10810/69985 | |
dc.description.abstract | Thermal NOx formation in H2 /air jet flames from a coaxial burner is studied experimentally and numerically. The aim is to study
possible NOx reduction strategies for domestic gas boiler burners. Following a flame splitting method strategy, a single burner
is studied at different inlet powers (from 0.2 to 1.0 kW). The effect of three different fuel-air ratios (or equivalence ratio φ) is
considered by varying the coaxial air stream, with fuel-air ratios corresponding to values of φ < 1, relevant for domestic boiler
applications (here φ = 0.77, φ = 0.83 and φ = 0.91). NOx concentrations increase with increasing inlet power between 0.2 and
0.6 kW and numerical results are in good correspondence with available experimental data. The opposite trend is observed above
0.6 kW and no numerical results are obtained, indicating a transition from laminar to turbulent flames. On the other hand, in contrast
to the observations made in turbulent non-premixed flames, reducing the equivalence ratio implies higher NOx concentrations in
the low Reynolds number flames considered. The numerical results in the laminar regime are used to highlight and quantify three
competing main factors concerning NOx production in order to interpret the experimental observations: the volume of the region
where NOx is produced, and within this region, the competition between residence time and NOx reaction rate. Based on this
analysis, different design strategies for low NOx hydrogen diffusion burners are finally discussed. | es_ES |
dc.description.sponsorship | The authors are grateful to the Basque Government for funding this research through projects IT781-13 and IT1314-19. Part of this work is also supported at Ciemat by the project #PID2019-108592RB- C42/AEI/10.13039/50110 0 011033. | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | Elsevier | es_ES |
dc.rights | info:eu-repo/semantics/openAccess | es_ES |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/es/ | * |
dc.subject | Domestic Burner | es_ES |
dc.subject | Hydrogen Economy | es_ES |
dc.subject | NOx reduction | es_ES |
dc.subject | Flame splitting | es_ES |
dc.subject | Coaxial air | es_ES |
dc.subject | Laminar simulations | es_ES |
dc.title | Experimental and numerical study of NOx formation in a domestic H2/air coaxial burner at low Reynolds number | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.rights.holder | © 2021 Elsevier under CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) | es_ES |
dc.relation.publisherversion | https://doi.org/10.1016/j.energy.2021.119768 | es_ES |
dc.identifier.doi | 10.1016/j.energy.2021.119768 | |
dc.departamentoes | Ingeniería Energética | es_ES |
dc.departamentoeu | Energia Ingenieritza | es_ES |