Heat transfer and fluid flow analysis of porous medium solar thermochemical reactor with quartz glass cover

Lougou, Bachirou Guene; Shuai, Yong; Pan, Ruming; Chaffa, Gédéon; Tan, He‐Ping

doi:10.1016/j.ijheatmasstransfer.2018.06.153

Cited by 51 publications

(13 citation statements)

References 45 publications

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“…The cold side of the TE also can be connected to cooling devices. [44,45,46,47] For indirect-coupled PV-TE hybrid system, PV cell and TE are separated in space. Considering the spectral response of PV cell, the photon energy of the sunlight higher than the band gap of PV cell is utilized by PV cell, while the photon energy of the sunlight lower than the band gap of PV cell is transferred to the TE.…”

Section: Methodsmentioning

confidence: 99%

Full-Spectrum Solar Energy Utilization and Enhanced Solar Energy Harvesting via Photon Anti-Reflection and Scattering Performance Using Nanophotonic Structure

Liang¹,

Wang²,

Cheng³

et al. 2020

ES Energy Environ.

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Conventional Si photovoltaic cells cannot convert full solar energy spectrum (400~2 500 nm) into electricity owing to the mismatch between Si band gap and broad range of solar photon energies. Transparent silicon PV cell allows sunlight in the wavelength of 1 100~2 500 nm to transmit through itself and irradiate on the thermal absorber below. The traditional photon management method based on texturing silicon layer with nanostructures can enhance 400~1 100 nm absorptivity and 1 1002 500 nm transmittance of transparent silicon PV cell. However, an increase in charge carrier capture and a decrease in electricity generation efficiency are often observed with this. In this study, a novel spectral splitting method based on frontlocated wavelength-sized TiO 2 biomimetic moth-eye nanophotonic structure is put forward, which can inhibit the increase of charge carrier capture and recombination. The biomimetic moth-eye nanophotonic structure was optimized by using finitedifference time-domain (FDTD) method to achieve excellent photon anti-reflection and scattering properties. The calculation results indicated that the absorption factor and transmission factor of transparent silicon PV cell could be increased from 46% to 58% and from 11% to 14%; the relative power conversion efficiency enhancement rate and relative incident radiation power enhancement rate was 32% and 27% when the TiO 2 biomimetic moth-eye was adopted.

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Section: Methodsmentioning

confidence: 99%

Full-Spectrum Solar Energy Utilization and Enhanced Solar Energy Harvesting via Photon Anti-Reflection and Scattering Performance Using Nanophotonic Structure

Liang¹,

Wang²,

Cheng³

et al. 2020

ES Energy Environ.

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“…The wind effect on the flow of particles is also under investigation. Packed bed or porous solid structured reactors benefit of low cost and offer reduced problems of solids attrition and erosion, but the drawbacks related to inefficient heat and mass transfer, nonuniform irradiance distribution on the particle volume, and more complex scale-up criteria must be underlined (Cho et al, 2015;Marxer et al, 2015;Deutsch et al, 2017;Tescari et al, 2017;Arribas et al, 2018;Guene Lougou et al, 2018;Zsembinszki et al, 2018;Almendros-Ibáñez et al, 2019;Guene Lougou et al, 2020;Peng et al, 2020;Shuai et al, 2020). As far as rotary kilns are concerned, they are characterized by long life of the main components, with not high maintenance costs and high versatility when particle shape, size and composition are taken into account (Alonso et al, 2017;Montagnaro et al, 2018).…”

Section: Fluidized Bed Solar Receivers and Reactors: Basic Design And Operational Features Particle Receivers And Fluidized Bedsmentioning

confidence: 99%

Fluidized Beds for Concentrated Solar Thermal Technologies—A Review

et al. 2021

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Thermal and thermochemical processes can be efficiently developed and carried out in fluidized beds, due to the unique properties of fluidized suspensions of solid particles and to the inherent flexibility of fluidized bed design and operation. Coupling fluidization with concentrated solar power is a stimulating cross-disciplinary field of investigation, with the related issues and opportunities to explore. In this review article the current and perspective applications of fluidized beds to collection, storage and exploitation of solar radiation are surveyed. Novel and “creative” designs of fluidized bed solar receivers/reactors are reported and critically discussed. The vast field of applications of solar-driven fluidized bed processes, from energy conversion with thermal energy storage, to solids looping for thermochemical energy storage, production of fuels, chemicals and materials, is explored with an eye at past and current developments and an outlook of future perspectives.

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“…Hsu and Howell's correlation was applied, for example, by Wang et al, [ 5 ] conducting a thermal performance analysis of solar receivers, as well as by Guene Lougou et al [ 8 ] for the investigation of a solar thermochemical reactor, both with silicon carbide (SiC) as porous material.…”

Section: Literature Study: Models For the Prediction Of The Extinctio...mentioning

confidence: 99%

“…Ceramic open‐cell foams are used in numerous areas of applications due to their advantageous properties, such as their low density, large specific surface area, high‐temperature resistance, low pressure drop, and good fluid mixing behavior. [ 1–3 ] In addition to their manifold uses as thermal protection systems, [ 2 ] solar receivers, [ 4–7 ] solar thermochemical reactors, [ 8,9 ] or porous burners, [ 10,11 ] a large application field for ceramic foams is the foundry. There, the foams are used for the conditioning of the melt flow and for metal melt filtration, that is, filtering out inclusions of endogenous and exogenous origin to improve the quality of the castings.…”

Section: Introductionmentioning

confidence: 99%

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Experimental and Simplified Predictive Determination of Extinction Coefficients of Ceramic Open‐Cell Foams Used for Metal Melt Filtration

et al. 2021

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A main application area of ceramic open‐cell foams is the foundry, where the porous media are used for conditioning and filtration of the melt flow. As characterization of heat transfer in such high‐temperature applications requires consideration of thermal radiation, knowledge of the radiative properties of the foams is essential. Instead of elaborative measurements or simulations, empirical correlations often serve as a simple and fast method to predict extinction coefficients. However, significant differences up to 100 m−1 occur between calculated values of various models presented in the literature. Herein, it is aimed to characterize the radiation behavior of different ceramic foams experimentally and identify reliable, simple yet accurate methods for the prediction of extinction coefficients of these materials by comparison with experimental results. The influences of pore density (10 and 20 pores per inch [ppi]) and filter material (Al2O3, ZrO2, SiC, Al2O3−C) on the transmittance, reflectance, and extinction coefficients are investigated by spectroscopic measurements. Two models from the literature are determined, which are well suited to predict extinction coefficients with an average deviation of less than 20%. Furthermore, accurate estimation with an average deviation of 12% can be also achieved using a projection method based on computed tomography scans of the foams.

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Heat transfer and fluid flow analysis of porous medium solar thermochemical reactor with quartz glass cover

Cited by 51 publications

References 45 publications

Full-Spectrum Solar Energy Utilization and Enhanced Solar Energy Harvesting via Photon Anti-Reflection and Scattering Performance Using Nanophotonic Structure

Full-Spectrum Solar Energy Utilization and Enhanced Solar Energy Harvesting via Photon Anti-Reflection and Scattering Performance Using Nanophotonic Structure

Fluidized Beds for Concentrated Solar Thermal Technologies—A Review

Experimental and Simplified Predictive Determination of Extinction Coefficients of Ceramic Open‐Cell Foams Used for Metal Melt Filtration

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