OATAO - Open Archive Toulouse Archive Ouverte Open Access Week

3D numerical simulation of upflow bubbling fluidized bed in opaque tube under high flux solar heating

Benoit, Hadrien and Ansart, Renaud and García-Triñanes, Pablo and Gauthier, Daniel and Flamant, Gilles and Simonin, Olivier 3D numerical simulation of upflow bubbling fluidized bed in opaque tube under high flux solar heating. (2016) In: 9th International Conference on Multiphase Flow (ICMF 2016), 22 May 2016 - 27 May 2016 (Firenze, Italy).

[img]
Preview
(Document in English)

PDF (Author's version) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
424kB

Abstract

Current solar Heat Transfer Fluids (HTF) only work below 600°C. We proposed to use air-fluidized Dense Particle Suspensions (DPS), also called Upflow Bubbling Fluidized Bed (UBFB), in tubes as a new HTF and storage medium in the frame of the so-called CSP2 FP7 European project. UBFB can operate up to the solid sintering temperature (1400 °C for SiC particles), thus improving the plant efficiency and cost of produced kWh. The DPS capacity to extract heat from a tube absorber exposed to concentrated solar radiation was demonstrated and the first values of the tube wall-to-DPS heat transfer coefficient were measured. A stable outlet temperature of 750 °C was reached with a metallic tube, and a particle reflux in the near tube wall region was evidenced. In this paper, the UBFB behavior is studied using the multiphase flow code NEPTUNE_CFD. Hydrodynamics of SiC Geldart A-type particles and heat transfer imposed by a thermal flux at the wall are coupled in 3D numerical simulations. The convective/diffusive heat transfer between the gas and dispersed phase, and the inter-particle radiative transfer (Rosseland approximation) are accounted for. Simulations and experiments are compared. The temperature influence on the DPS flow is analyzed.

Item Type:Conference or Workshop Item (Paper)
Additional Information:Thanks to the ICMF. This paper appears in Proceedings of the 9th International Conference on Multiphase Flow (ICMF 2016).
HAL Id:hal-01715386
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Université de Perpignan Via Domitia - UPVD (FRANCE)
Other partners > University of Surrey (UNITED KINGDOM)
Laboratory name:
Funders:
European Commission
Statistics:download
Deposited By: Olivier SIMONIN
Deposited On:02 Feb 2018 08:58

Repository Staff Only: item control page