Experimental study of ceramic foams used as high temperature volumetric solar absorber

Sébastien, Mey-Cloutier,; Caliot, Cyril; Kribus, Abraham; Gray, Y.; Flamant, Gilles

doi:10.1016/j.solener.2016.06.066

Cited by 84 publications

(34 citation statements)

References 48 publications

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“…Specifically in energy related applications, emissivity measurements are challenging. [104][105][106][107][108][109] Thermal conductivity based on phonon vibrations in dense materials is affected by grain size, grain boundaries, porosity, impurities, whiskers, and domain structures. The thermal conductivity is given in Equation 7.…”

Section: Thermal Characterizationmentioning

confidence: 99%

Reticulated Replica Ceramic Foams: Processing, Functionalization, and Characterization

et al. 2017

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Reticulated ceramic foams are used in a wide range of applications such as filters, catalyst supports, lightweight materials, energy absorptions materials, or as scaffolds for tissue engineering as the most common ones. Based on gaseous foaming processes of polymers, a stochastic distribution of closed pores is obtained. By reticulation processing thin foam windows are removed between cells turning a closed cell into an open cell structure. These foams are used as template for porous ceramics manufacturing: With different processing approaches, for example, with dip coating of a ceramic slurry and a subsequent (multistep) thermal treatment ceramic reticulate foams are obtained. A variety of material properties strongly depend on the cell and strut size, as well on material composition. Functionalization of ceramic foam surfaces (outer surface functionalization), for example, with zeolites or nanosized aggregates lead to an increase of the specific surface area or provides catalytic or heat storage functionality. Filling of struts (inner surface functionalization) may lead to improved mechanical stability or may provide functionalities such as electric conductivity. The present work summarizes the processing steps from the template foam to the final cellular ceramic, functionalization strategies, and the most common characterization techniques.

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Section: Thermal Characterizationmentioning

confidence: 99%

Reticulated Replica Ceramic Foams: Processing, Functionalization, and Characterization

et al. 2017

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“…These variables are related to the concentrator geometry and material such as its concentrator shape, diameter, rim angle, reflectivity or depends on errors including solar tracking error and optical error. Other parameters such as receiver material, its tube diameter, inlet temperature, mass flow rate through the receiver affect the thermodynamic efficiency of the system . In addition, atmosphere condition like wind, affecting heat losses in the receiver, is involved in the efficiency.…”

Section: Brayton Cyclesmentioning

confidence: 99%

“…Other parameters such as receiver material, its tube diameter, inlet temperature, mass flow rate through the receiver affect the thermodynamic efficiency of the system. 65,66 In addition, atmosphere condition like wind, affecting heat losses in the receiver, is involved in the efficiency. All these parameters must be considered in the modeling of receivers.…”

Section: Brayton Cyclesmentioning

confidence: 99%

A review on solar‐assisted gas turbines

Ahmadi

Nazari

Ghasempour

et al. 2018

Energy Science & Engineering

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The thermal energy of the sun can be used for electricity generation. Solar thermal energy can be applied with fossil fuels or independently in order to reduce the cost of generated electricity and CO2 emission. Several cycles are introduced to extract solar thermal energy to be used in power plants. Brayton cycles, Rankine‐Brayton cycles, and supercritical Brayton cycles are among the most conventional ones. Based on the reviewed researches, using solar energy in addition to fossil fuels results in lower carbon dioxide emission and lower levelized cost of the generated electricity. Moreover, thermodynamic and economic analyses of the cycles revealed that heat recovery leads to higher efficiency while increase capital cost. The efficiency of solar‐assisted gas turbines depend on various parameters including pressure ratio, turbine inlet temperature, heat absorber geometry and the performance of the components. The enhancement in the efficiency of the cycles by applying each method depends on the configuration, operating condition. For instance, results have shown that 10% increase in turbine efficiency can led to 6%‐12% improvement in the efficiency of a closed‐Brayton cycle.

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“…Volumetric receivers with a proper choice of porous structure and solid constituent can collect a solar radiation power that is significantly higher than tubular receivers [5]. These high open porosity and specific surface materials can be for instance monolith honeycomb structures [6,7], isotropic reticulated foams [7][8][9][10][11] or non-extrudable 3D periodic lattices [10]. The diameter of the channels or pores typically ranges from 0.5 to 5 mm.…”

Section: Introductionmentioning

confidence: 99%

“…These strict requirements rule out oxides and suggest silicon carbide (SiC), which is still considered as the reference material for the application. SiCbased honeycombs and foams have the advantage of being commercially available and they have soon been considered for the design of volumetric solar receivers [4,6,7,11,[13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and properties of multiscale porosity TiC-SiC ceramics

Baux

Nouvian

Arnaud

et al. 2019

Journal of the European Ceramic Society

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A process combining the pyrolysis of a lignocellulosic structure and reactive gas treatments has been developed to prepare porous TiC-SiC ceramics for solar receivers. The natural micro-porosity of balsa was complemented by a high open macro-porosity by laser cutting a periodical arrangement of parallel channels. The lignocellulosic structure was first pyrolysed into carbon. This reactive carbon material was then converted into TiC by Reactive Chemical Vapor Deposition (RCVD) using TiCl4/H2. After controlling the absence of cracks due to volume changes, the TiC structure was finally infiltrated by the Chemical Vapor Infiltration (CVI) of SiC using CH3SiCl3/H2. The density, porous structure, elemental and phase compositions, oxidation behavior and crushing strength were assessed after pyrolysis, RCVD and CVI. The SiC CVI coating significantly improves the compressive strength, the oxidation resistance and the thermal properties. The SiC layer is no longer fully protective at high temperature but the mechanical properties remain reasonably high.

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Experimental study of ceramic foams used as high temperature volumetric solar absorber

Cited by 84 publications

References 48 publications

Reticulated Replica Ceramic Foams: Processing, Functionalization, and Characterization

Reticulated Replica Ceramic Foams: Processing, Functionalization, and Characterization

A review on solar‐assisted gas turbines

Synthesis and properties of multiscale porosity TiC-SiC ceramics

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