Journal
PROCEEDINGS OF THE SOLARPACES 2013 INTERNATIONAL CONFERENCE
Volume 49, Issue -, Pages 478-487Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.egypro.2014.03.051
Keywords
volumetric solar absorber; concentrated solar power (CSP); porous medium; reticulate porous ceramic (RPC); ceramic foam; silicon carbide (SiC); Navier-Stokes equations; flow modelling; pressure drop; Darcy-Forchheimer law; coupled heat transfers; conduction; convection; radiation; Rosseland; P-1 model; two-flux approximation; Monte-Carlo
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Funding
- ANR France [ANR-11-SEED-0009]
- Ministry of Foreign Affairs (France)
- Ministry of National Education and Research (France)
- Ministry of Science and Technology (Israel)
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Focusing on radiative properties (absorption and scattering coefficient, scattering phase-function) of silicon carbide foams, several predictive models are compared to spectral transmittance and reflectance measurements (bi-directional and directional-hemispherical) in the aim of determining new correlations based on ceramic foam characteristics (struts/pores size and porosity). A mono-dimensional modeling is developed to solve Navier-stokes equations (conservation of mass and momentum) and energy equations (coupled heat transfers) inside the absorber. Several radiative models are tested to approximate the radiative transfer equation end compute the radiative source term (Rosseland, P-1 model, and two-flux approximation). Numerical simulations are compared to reference results obtained with Monte-Carlo algorithm using net-exchange formulation. (C) 2013 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license
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