Experimental testing of a solar air cavity-receiver with reticulated porous ceramic absorbers for thermal processing at above 1000 °C

Patil, Vikas R.; Kiener, Fabio; Grylka, Adrian; Steinfeld, Aldo

doi:10.1016/j.solener.2020.11.045

Cited by 41 publications

(15 citation statements)

References 52 publications

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“…Solar reactors for effecting this cycle include cavity receivers with rotating or stationary structures, [48][49][50][51][52][53][54][55][56][57][58][59][60] glass dome reactors, [61] aerosol flow reactors, [62] particle reactors, [63] and moving and fluidized bed reactors. [64,65] The most promising receiver/reactor designed to date is the cavity receiver containing a reticulated porous ceramic (RPC) foam made of pure CeO 2 .…”

Section: Resultsmentioning

confidence: 99%

“…[64,65] The most promising receiver/reactor designed to date is the cavity receiver containing a reticulated porous ceramic (RPC) foam made of pure CeO 2 . [51][52][53][54][55][56][57][58][59] A schematic of the receiver reactor is proposed in Figure 1. The RPC was directly exposed to concentrated thermal radiation at mean solar flux concentration ratios of up to 3015 suns.…”

Section: Resultsmentioning

confidence: 99%

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Perspectives of Perovskites for Solar Thermochemical Splitting of CO₂ or H₂O Molecules

Boretti

2021

Adv Energy and Sustain Res

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Perspectives of Perovskites for Solar Thermochemical Splitting of CO₂ or H₂O Molecules

Boretti

2021

Adv Energy and Sustain Res

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“…It was indicated that the carborundum had the better heat transfer performance with the same porosity and porous diameter than other materials. Patil et al [13] analyzed the receivers filled with carborundum, cerium oxide, and aluminum oxide metal foam and found that with the same porosity, the heat transfer performance of receiver filled with carborundum was better than those filled with the other two metal foams. Du et al [14] studied a porous volumetric solar receiver with molten salt as the heat transfer fluid.…”

Section: Introductionmentioning

confidence: 99%

Analysis on the Effects of Different Receiver Structures and Porous Parameters on the Volumetric Effects and Heat Transfer Performance of Porous Volumetric Solar Receiver

Xie

Yao

et al. 2023

International Journal of Energy Research

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The volumetric solar receiver is an important heat transfer component of the concentrated solar power (CSP) system. Moreover, in order to improve the absorption of concentrated solar radiation, the porous media are widely used in volumetric solar receiver. In recent years, many studies were concerned with the effects of porosity, pore number density and size, Reynolds number, and Darcy number on heat and flow performance in volumetric solar receiver. However, there are few studies on the effects of structure type and geometric parameters on the volumetric effects and the radiation characteristics of a porous volumetric solar receiver with nonuniform heat flux boundary condition. In this contribution, in order to analyze the effects of structures on the volumetric effects and heat transfer performance, we design six types of porous volumetric receiver structures, whereas the volume of different structures keeps consistent. Then, we apply the local non-thermal-equilibrium model and also consider the effect of structure shape on the concentrating solar radiation transport characteristic. Furthermore, we apply the Gaussian distribution model (GDM) to simulate the actual nonuniform heat flux boundary condition. The result shows that drum-type structure (RT-III) has the best heat transfer performance among the six structures; e.g., the outlet average temperature of fluid is up to 851 K when the pore size and porosity of porous media are 2 mm and 0.7, respectively, which is 41 K increased than the scaled cone-type structure. In addition, the pore diameter has less influence on the outlet temperature of fluid, but it has greater influence on the pressure drop. The contribution can provide a reference for this type of solar receiver design and reconstruction.

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“…In the literature, diverse works on cavity receivers have been performed by many researchers to improve the performance of solar concentrating systems. Patil et al [5] reported a 5 kW solar cavity receiver containing a reticulated porous ceramic structure. The results showed that the system achieved a peak efficiency of 0.69 at 1133 • C air outlet temperature.…”

Section: Introductionmentioning

confidence: 99%

Optical Performance Comparison of Different Shapes of Cavity Receiver in the Fixed Line-Focus Solar Concentrating System

Hai

Song

2022

Sustainability

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To optimize the fixed-focus solar concentrating system (FLSCS) and linear cavity receiver of better optical performance, the effects of receiver parameters (geometric shape, receiver position f, receiver internal surface absorptivity αab, and end reflection plane reflectivity ρr) on the relative optical efficiency loss ηre-opt,loss, the maximum value of the local concentration ratio Xmax, and the non-uniformity factor σnon were studied in the present study. The results showed that the increases of sun declination angle δ in the range of 0–8° have a weak effect on the ηre-opt,loss. The ηre-opt,loss are 2.25%, 2.72%, 12.69% and 2.62%, 3.26%, 12.85%, respectively, when the solar hour angle ω is 0°, 30°, 60° as δ = 0° and 8° for linear rectangular cavity receiver. The Xmax mainly depends on the energy flux distribution of first intercepted sunlight on the cavity absorber inner wall. Increasing the distance between the cavity absorber inner wall and the focal line Δf can affect the Xmax. The smaller the Δf, the greater the Xmax, and vice versa. The changing trend of σnon is basically consistent with that of the Xmax. When the f is 600, 625, 650, 675, 700 mm and the ω = 0°, the σnon are 0.832, 0.828, 0.801, 0.747, and 0.671, respectively, for linear rectangular cavity receiver. This work could establish the foundation for further research on the optical to thermal energy conversion in the FLSCS.

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Experimental testing of a solar air cavity-receiver with reticulated porous ceramic absorbers for thermal processing at above 1000 °C

Cited by 41 publications

References 52 publications

Perspectives of Perovskites for Solar Thermochemical Splitting of CO₂ or H₂O Molecules

Perspectives of Perovskites for Solar Thermochemical Splitting of CO₂ or H₂O Molecules

Analysis on the Effects of Different Receiver Structures and Porous Parameters on the Volumetric Effects and Heat Transfer Performance of Porous Volumetric Solar Receiver

Optical Performance Comparison of Different Shapes of Cavity Receiver in the Fixed Line-Focus Solar Concentrating System

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Experimental testing of a solar air cavity-receiver with reticulated porous ceramic absorbers for thermal processing at above 1000 °C

Cited by 41 publications

References 52 publications

Perspectives of Perovskites for Solar Thermochemical Splitting of CO2 or H2O Molecules

Perspectives of Perovskites for Solar Thermochemical Splitting of CO2 or H2O Molecules

Analysis on the Effects of Different Receiver Structures and Porous Parameters on the Volumetric Effects and Heat Transfer Performance of Porous Volumetric Solar Receiver

Optical Performance Comparison of Different Shapes of Cavity Receiver in the Fixed Line-Focus Solar Concentrating System

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Perspectives of Perovskites for Solar Thermochemical Splitting of CO₂ or H₂O Molecules

Perspectives of Perovskites for Solar Thermochemical Splitting of CO₂ or H₂O Molecules