Optimization of high temperature SiC volumetric solar absorber

S. Mey*, C. Caliot, G. Flamant, A. Kribus, Y. Gray

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

Abstract

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.

Original languageEnglish
Pages (from-to)478-487
Number of pages10
JournalEnergy Procedia
Volume49
DOIs
StatePublished - 2014
EventInternational Conference on Solar Power and Chemical Energy Systems, SolarPACES 2013 - Las Vegas, NV, United States
Duration: 17 Sep 201320 Sep 2013

Keywords

  • Ceramic foam
  • Concentrated solar power (CSP)
  • Conduction
  • Convection
  • Coupled heat transfers
  • Darcy-Forchheimer law
  • Flow modelling
  • Monte-Carlo
  • Navier-Stokes equations
  • P-1 model
  • Porous medium
  • Pressure drop
  • Radiation
  • Reticulate porous ceramic (RPC)
  • Rosseland
  • Silicon carbide (SiC)
  • Two-flux approximation
  • Volumetric solar absorber

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