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Combined Heat Transfer in a Semitransparent Multilayer Packed Bed

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TLDR
In this paper, combined radiative, conductive, and forced convective heat transfer through a packed bed composed of two spectrally dissimilar slabs of particles is analyzed on the basis of the two-flux model.
Abstract
Combined radiative, conductive, and forced convective heat transfer through a packed bed composed of two spectrally dissimilar slabs of particles is analyzed on the basis of the two-flux model. Taking into account the variation of absorption and scattering of the layers in the visibles and infrared spectral ranges, the selectivity of such a system is proved theoretically. Experiments are run using a bed composed of glass and silicon carbide particles as a solar absorber for gas heating. Good agreement is shown in comparison of predictions with experimental data.

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Journal ArticleDOI

Volumetric receivers in Solar Thermal Power Plants with Central Receiver System technology: A review

TL;DR: A chronological review of the volumetric receivers of most interest for electricity production, identifying their different configurations, materials and real and expected results, and pointing out their main advantages and conclusions based on the multitude of international and national projects reports and references.
Journal ArticleDOI

Coupled radiation and flow modeling in ceramic foam volumetric solar air receivers

TL;DR: In this article, the macroscopic temperature distribution of the fluid and solid phases in volumetric solar air receivers is analyzed, and the effects of velocity, porosity, mean cell size and the thermal conductivity of the solid phase on the temperature fields are analyzed.
Journal ArticleDOI

Perovskite oxides – a review on a versatile material class for solar-to-fuel conversion processes

TL;DR: In this paper, a review of perovskite oxides to design and optimize next generation solar-to-fuel conversion materials operating on thermochemical cycles is presented, where the lattice structure and defect thermodynamics towards CO2 and water splitting are discussed.
Journal ArticleDOI

Experimental and Numerical Study of Premixed Combustion Within Nonhomogeneous Porous Ceramics

TL;DR: In this paper, an experimental and numerical investigation of premixed methane combustion within a nonhomogeneous porous ceramic was performed and the results demonstrated that porous ceramic burners provided a range of stable burning rates at a constant φ, the maximum flame speed inside the burners was much higher than the premixed, freely burning adiabatic laminar flame (free flame) speed.
Journal ArticleDOI

Fully coupled transient modeling of ceramic foam volumetric solar air receiver

TL;DR: In this article, a fully coupled transient model of the volumetric solar air receiver is developed to predict the transient behaviors of the receiver under various working conditions, including pressure drop of the absorber, interfacial heat transfer between the flowing fluid and solid, and radiative heat transfer due to concentrated solar radiation absorption by ceramic foam and the radiation transport inside the media.
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