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Numerical evaluation of a novel double-concentric swirl burner for sulfur combustion

Zhang, F. 1; Heidarifatasmi, H. ORCID iD icon 1; Harth, S. 1; Zirwes, T. ORCID iD icon 2; Wang, R. 1; Fedoryk, M. 1; Sebbar, N. 1; Habisreuther, P. ORCID iD icon 1; Trimis, D. 1; Bockhorn, H. 1
1 Karlsruher Institut für Technologie (KIT)
2 Scientific Computing Center (SCC), Karlsruher Institut für Technologie (KIT)


A burner system for the efficient and clean combustion of sulfur is introduced, which serves as a key component in a novel solar power cycle using sulfur as chemical storage medium of solar energy. In order to validate the proposed design concept, highly-resolved numerical simulations have been performed. The current setup is operated with a thermal load of 20 kW or power density of 5 MW/m$^{3}$. Two nozzle configurations with different swirl intensities (SI) of the airflow are studied. A large inner recirculation zone is observed for the nozzle with a high SI (HSI), which leads to a strong radial dispersion of the sulfur spray and a broad, short flame in the combustion chamber; although this HSI design is beneficial from the viewpoint of flame stabilization, it causes a large number of sulfur droplets hitting the chamber wall. In contrast, the nozzle design with a low SI (LSI) yields a narrow spray and a long jet flame, with much less droplets hitting the wall. The HSI nozzle shows an overall higher flame temperature compared with the LSI nozzle, which is confirmed to be caused by burning at a higher local fuel equivalence ratio. This is attributed to the strong inner recirculation flow generated by the high swirl intensity, which results in an enhanced evaporation and mixing of sulfur droplets with air. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000124094
Veröffentlicht am 19.10.2020
DOI: 10.1016/j.rser.2020.110257
Zitationen: 11
Zitationen: 11
Cover der Publikation
Zugehörige Institution(en) am KIT Engler-Bunte-Institut (EBI)
Scientific Computing Center (SCC)
Universität Karlsruhe (TH) – Zentrale Einrichtungen (Zentrale Einrichtungen)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 11.2020
Sprache Englisch
Identifikator ISSN: 1364-0321, 1879-0690
KITopen-ID: 1000124094
HGF-Programm 34.14.02 (POF III, LK 01) Vergasung
Erschienen in Renewable & sustainable energy reviews
Verlag Elsevier
Band 133
Seiten Art. Nr.: 110257
Schlagwörter Solar power cycle sulfur combustion spray,combustion Euler-Lagrangian simulation, OpenFOAM
Nachgewiesen in Dimensions
Globale Ziele für nachhaltige Entwicklung Ziel 7 – Bezahlbare und saubere Energie
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
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