Experimental and numerical analysis of the heat transfer in a packed bed exposed to the high thermal radiation flux

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autor(en): Ruiz G, Ripoll N, Fedorova N, Zbogar-Rasic A, Jovicic V, Delgado A, Toledo M
Zeitschrift: International Journal of Heat and Mass Transfer
Jahr der Veröffentlichung: 2019
Band: 136
Seitenbereich: 383-392
ISSN: 0017-9310


Abstract

This paper investigates temperature profiles and heat fluxes
in a packed bed heated by radiation that simulates solar energy flux.
For this purpose, the discrete element method (DEM) was used along a heat transfer model (conduction and radiation mechanism). Short-range model is proposed for considering thermal radiation in a discrete elements system, which represents an easy-to-implement and low-computational-cost alternative. As results of the simulations, thermal
profiles through the packed bed were obtained, as well as the
accompanying heat flux. Experiments were performed in a packed bed of
inert ceramic particles (alumina spheres). A radiant porous burner was
placed at the bottom of the packed bed to simulate an imposed
concentrated solar heat flux. Numerical results show good agreement with
experimental data. In addition, the thermal profiles, obtained by the
heat transfer model in DEM, were compared with the results obtained by
discretizing the conservation of energy equation
of the solid phase using finite differences, showing a correlation
between the power and temperatures reached. It is concluded that the
radiation model proposed provides the basis to continue with the study
of granular materials at high temperature, where radiation is the dominant mechanism.


FAU-Autoren / FAU-Herausgeber

Delgado, Antonio Prof. Dr.-Ing.
Lehrstuhl für Strömungsmechanik
Fedorova, Nataliia
Lehrstuhl für Strömungsmechanik
Jovicic, Vojislav
Lehrstuhl für Strömungsmechanik
Zbogar-Rasic, Ana Dr.-Ing.
Lehrstuhl für Strömungsmechanik


Autor(en) der externen Einrichtung(en)
Universidad Técnica Frederico Santa María


Zitierweisen

APA:
Ruiz, G., Ripoll, N., Fedorova, N., Zbogar-Rasic, A., Jovicic, V., Delgado, A., & Toledo, M. (2019). Experimental and numerical analysis of the heat transfer in a packed bed exposed to the high thermal radiation flux. International Journal of Heat and Mass Transfer, 136, 383-392. https://dx.doi.org/10.1016/j.ijheatmasstransfer.2019.03.009

MLA:
Ruiz, Gustavo, et al. "Experimental and numerical analysis of the heat transfer in a packed bed exposed to the high thermal radiation flux." International Journal of Heat and Mass Transfer 136 (2019): 383-392.

BibTeX: 

Zuletzt aktualisiert 2019-11-03 um 15:08