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Thermal analysis and design of a volumetric solar absorber depending on the porosity

Author

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  • Roldán, M.I.
  • Smirnova, O.
  • Fend, T.
  • Casas, J.L.
  • Zarza, E.

Abstract

The thermal evaluation of different absorber configurations for a volumetric solar receiver designed for a solar furnace has been carried out by means of commercial Computational Fluid Dynamics (CFD) software in a 2D numerical model. Simulation results for proposed configurations depending on the porosity are discussed and compared to find the optimum configuration for which flow instabilities and thermal stresses are minimized and higher efficiencies are reached. The results obtained from the comparison of air velocity and thermal profiles at the absorber outlet propose a gradual-porosity configuration as an alternative to a previous design of a porous silicon-carbide honeycomb structure in order to heat an air stream up to temperatures suited for several high-temperature industrial processes.

Suggested Citation

  • Roldán, M.I. & Smirnova, O. & Fend, T. & Casas, J.L. & Zarza, E., 2014. "Thermal analysis and design of a volumetric solar absorber depending on the porosity," Renewable Energy, Elsevier, vol. 62(C), pages 116-128.
    • Handle: RePEc:eee:renene:v:62:y:2014:i:c:p:116-128
    DOI: 10.1016/j.renene.2013.06.043
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    References listed on IDEAS

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