CFD parametric analysis of wire meshes open volumetric receivers with axial-varied porosity and comparison with small-scale solar receiver tests

Antonio L. Avila-Marin

Renewable Energy, 2022, vol. 193, issue C, 1094-1105

Abstract: The Porous Continuum method with local thermal non-equilibrium state and the P1 approximation is adopted to analyse the potentialities of using staggered stack wire meshes in double, gradual-porosity air absorbers in the axial direction. A parametric study with 300 cases, is performed considering meshes with different geometrical properties and layer thickness ratios in order to achieve greater efficiency than that offered by single-porosity metallic volumetric absorbers. The parametric study considers three different arrangements: gradually decreasing porosity, absorbers with two different layers of similar porosity and gradually increasing porosity within the air flow. The study identifies 10 configurations exceeding 90% thermal efficiency at usual working conditions. Finally, the three best configurations of the parametric analysis are experimentally tested at a small-scale laboratory test-bed and the numerical method is validated successfully in three-dimensional simulations to account for the heterogeneous solar flux profile.

Keywords: Porous medium; Volumetric receivers; Axial-varied porosity; Wire mesh; Volumetric absorbers; Modelling (search for similar items in EconPapers)
Date: 2022
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Citations: View citations in EconPapers (3)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:193:y:2022:i:c:p:1094-1105

DOI: 10.1016/j.renene.2022.05.060

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