Ceramic Heat Research Articles

Calculation of Temperature Fields in a Lithium Ceramic Pebble Bed during Reactor Irradiation in a Vacuum.

Two-phase lithium ceramic Li2TiO3-Li4SiO4 is considered as a tritium multiplier for use in the solid blanket of fusion reactors. To date, the most accurate understanding of the processes of tritium and helium production and release occurring in the breeder blanket materials under neutron irradiation can only be obtained from experiments in fission research reactors. At that, irradiations in vacuum give the possibility to register even very fast gas release processes (bursts) from the ceramics' voids and pores, although it reduces the thermal conductivity of the pebble bed. The purpose of this work was to simulate the heating of mono-sized pebble bed (1 mm in diameter) of two-phase lithium ceramic 25 mol%Li2TiO3+75 mol%Li4SiO4 in an ampoule device during neutron irradiation at the WWR-K research reactor under vacuum conditions, and to determine experimental parameters in order to prevent heating of the lithium ceramics up to the Li4SiO4-Li2SiO3 phase transition temperatures (>900 °C). For the first time, it was obtained that the effective thermal conductivity of a 1 mm mono-sized pebble bed of 25 mol%Li2TiO3+75 mol%Li4SiO4 significantly decreases (four times) when it is irradiated with neutrons in a vacuum (at a helium pressure of approximately 10 Pa), compared to a similar calculation at 100 kPa of helium (when the He sweep is used). It was concluded that it is difficult to evaluate the maximal temperature of the ceramics in the capsule by measuring the temperature of its outer metal wall (according to thermocouple readings) without using the results of thermophysical calculations for each type of ceramic, taking into account its quantity, specific heat release and pebble size(s). To control the temperature of the ceramics during an irradiation experiment in a vacuum, an in-capsule thermocouple should be used, placed in the center of the pebble bed. Measuring the temperature of the pebble bed based on the capsule wall temperature can lead to overheating of the ceramics and phase changes.

Verification of high throughput simultaneous measurement for Seebeck coefficient, resistivity, and thermal diffusivity of thermoelectric materials

Development of thermoelectric conversion materials which have better figure-of-merit, Z, has been actively performed, and high throughput Z evaluation is necessary. Though Seebeck coefficient and electrical resistivity are relatively easily measured, the thermal diffusivity is not. To overcome this, novel simultaneous measurement method for the measurement of the three thermoelectric properties with a thermocouple probe and a ceramic heater has been proposed. Seebeck coefficient and electrical resistivity are measured using the steady-state method with 4 probes, and the thermal diffusivity is measured using the periodic heating method. In this research, the concept and development of the simultaneous measurement systems in a wide temperature range to make it easy, fast, and precise by adjusting the measurement parameters such as the frequency range of periodic heating, heating power, and by adopting new analysis method. Seebeck coefficient, electrical resistivity, and thermal diffusivity of Bi2Te3, Ni, and constantan and the thermal diffusivity of Al2O3 are evaluated from room temperature to high temperature of 800 K.

Numerical assessment of ceramic micro heat exchangers working with nanofluids by Taguchi optimization approach

The rapid advancements in microsystems technology have necessitated the exploration of innovative materials for efficient thermal management in micro heat exchangers. This research delves into the performance evaluation of three ultra-high temperature ceramics (UHTCs): ZrB2, BeO, and Si3N4 as alternative micro heat exchanger fabrication materials. The study systematically assessed the ceramics' interaction with Al2O3-nanofluids across diverse volume percentages and mass flow rates using the Taguchi optimization method. Beryllium oxide (BeO) emerged as the superior material, registering warm outlet temperatures as low as 64.86°C and cold outlet peaks at 31.68°C. Sensitivity analyses further underscored the critical role of inlet temperature on outlet dynamics, with warm and cold outlets showing significances of ~72% and ~99%, respectively. Additionally, the research pinpointed 0.75 vol% as the optimal Al2O3-nanofluid concentration, yielding the most favorable performance metrics across the ceramics.

Alternatives to incandescent bulbs in Berlese funnels for detecting stored-product beetles in grain

We conducted a study to find alternative bulbs to use with Berlese funnels as a replacement for incandescent bulbs following widespread bans on their production and use. To do this, we measured the mean percent-recovery of adults and larvae of common stored-product beetles from 1-kg samples of wheat (12.5–14.5% moisture content) after 6 h using A19-style halogen bulbs and ceramic heat lamps, and compared them to recoveries using incandescent bulbs. We found that the 72W halogen bulb performed similarly to the incandescent bulb for all four species tested. Using this bulb, we recovered, on average, >85% of adult Cryptolestes ferrugineus, Rhyzopertha dominica, and adult and larval Tribolium castaneum, as well as >70% of adult Sitophilus oryzae. Recovery of adult beetles using the heat lamp was similar to the incandescent bulb, but recovery of larval T. castaneum was significantly lower. The 43W and 53W halogens had significantly lower recovery rates compared to the incandescent bulb for adult C. ferrugineus (both bulbs) and adult and larval T. castaneum (43W halogen). Average recovery of larval C. ferrugineus was low for all bulbs (<70%). Grain moisture content did not influence average recovery across species or life stages. We also investigated whether an operating time shorter than 6 h could be used with an alternative bulb, but found that 6 h was still the minimum time required to maximize adult and larval recovery. We recommend using 72W A19 style halogen bulbs in place of incandescent bulbs because they have similar recovery rates as the incandescent bulb, and are cost-effective compared to ceramic heat lamps. However, some systems may not be able to handle the increase in power consumption and so we suggest assessing the system before running a full bank of lights.

Advanced Manufacturability of Electrical Machine Architecture through 3D Printing Technology

The rapid evolution of electric machines requires innovative approaches to boost performance, efficiency, and sustainability. Additive Manufacturing (AM) has emerged as a transformative technique, reshaping the landscape of electric machine components, ranging from magnetic materials to windings and extending to thermal management. In the area of magnetic materials, AM’s capacity to fabricate intricate structures optimizes magnetic flux dynamics, yielding advanced shape-profile cores and self-coating laminations for superior performance. In windings, AM’s prowess is evident through innovative concepts, effectively mitigating AC conduction effects while reducing weight. Furthermore, AM revolutionizes thermal management, as exemplified by 3D-printed ceramic heat exchangers, intricate cooling channels, and novel housing designs, all contributing to enhanced thermal efficiency and power density. The integration of AM not only transcends conventional manufacturing constraints but also promises to usher in an era of unprecedented electric machine innovation, addressing the intricate interplay of magnetic, winding, and thermal dynamics.

РЕЖИМНЫЕ ПАРАМЕТРЫ ИНФРАКРАСНЫХ ЭЛЕКТРОНАГРЕВАТЕЛЕЙ НА ОСНОВЕ НАНОМОДИФИЦИРОВАННЫХ ЭЛАСТОМЕРОВ ДЛЯ ТЕХНОЛОГИЧЕСКИХ ПРОЦЕССОВ В АПК

Modernization of the agro-industrial complex can be based on the use of energy efficient technical approaches. One of the directions in the field of energy saving is the use of infrared (IR) heaters, for the creation of which it is most rational to use technological methods for obtaining composite materials based on dielectric matrices (elastomers) with the addition of conductive structures with nanosized geometric parameters (MСNTs - multilayer carbon nanotubes). Studies have shown that when the heater samples are turned on, a short-term current jump occurs, which is associated with heating of the elastomer with MСNT and the formation of an electric field in the composite structure. The inrush current ratio for sample No. 1 (Silagerm 8020, MCNT 3%, nickel 10%) is 3.56 A (setting time of the operating mode is 350 s), which is the highest value. The smallest inrush current ratio of 1.65 A (setting time of the operating mode 250 s) is typical for sample No. 2 (Silagerm 8030, MСNT 3%, bronze 10%). For sample No. 3 (Silagerm 8030, MCNT 3%, aluminum 10%) at alternating current, the shortest time to reach the operating mode (140 s) is typical. The operating modes of heaters on alternating and direct current are different, which is associated with the formation of morphological and structural properties in composites that affect the flow of electric current of various types. All samples are characterized by a mode in which the current decreases and after 140-360 s is set to the operating mode corresponding to the heat balance, in which this current is spent to create a heat flow to heat the plant material and compensate for heat losses to the environment. It has been established that the operating mode of heaters based on elastomers modified with MCNT is characterized by the time interval for reaching the operating mode from 140 to 350 s, which exceeds the value for ceramic heaters based on barium titanate (BaTiO3). But the operating temperature is more stable and does not change over time (under constant heat exchange conditions). The use of elastic matrices makes it possible to form effective IR heating systems for technological processes of processing plant materials.

A novel hot embossing process for producing high-quality glass micro-pillar arrays

Hot embossing is an efficient technology for the fabrication of glass micro- and nanostructures. However, the long cycle time, high energy consumption, and high nitrogen emissions in traditional hot embossing approach hinders sustainable production of glass micro-optics. Therefore, this paper proposes a novel two-stage gravity-assisted hot embossing process that enables the fabrication of high-quality glass micro-pillar arrays in a rapid, green manner. In this approach, the two-stage gravity loading unit provides accurate force on glass preform through a simple control system, and the tailor-made heating module based on Si3N4 ceramic heaters requires an energy consumption of just 700 kJ per molding cycle. As a result, the proposed approach is featured by low energy consumption and high manufacturing efficiency. In this study, the effects of the embossing temperature, force, and time on the replication accuracy of a K9 glass micro-pillar array were investigated through a series of hot embossing experiments. Afterward, the form accuracy, uniformity of microstructures, and warpage of glass replicas under the optimal process parameters were evaluated separately. Finally, repeated hot embossing experiments were conducted to demonstrate the reproducibility of the hot embossing process. The experimental results show that embossing temperature had the most significant effect on the replication accuracy of glass micro-pillars. By optimizing the process parameters, the embossed glass micro-pillars could achieve transfer ratios of 99.00% and 95.14% in height and diameter, respectively. Moreover, the surface roughness of glass micro-pillars was less than 5 nm, and the warpage amplitude of glass replicas in a 3.9 × 3.9 mm area was smaller than 1 μm. The small discrepancy in geometric features of glass replica in the repeated trails reflects the satisfactory reproducibility of this hot embossing process on the micro and nano scales. The results indicate the strong industrialization potential of the proposed two-stage gravity-assisted hot embossing machine and hot embossing process for fabricating high-quality glass microstructures more cleanly and sustainably.

Development of a crankshaft driven single long NiTi tube compressive elastocaloric cooler

Elastocaloric cooling has no environmental effects during operation, and achieving a compact structure especially the driver is significant for its commercialization. In this article, a compact, standalone crankshaft driven single long NiTi tube compressive elastocaloric cooler is developed. A crankshaft driver was designed and fabricated to drive a compressive elastocaloric regenerator utilizing a single long polycrystalline superelastic NiTi shape memory alloy tube (outer diameter 5 mm, wall thickness 1 mm, and initial length 305 mm). A novel design of ceramic heat insulation plate was applied to the cooler to reduce the conduction heat loss from the NiTi tube to the stainless-steel loading heads. The cooling performance of the cooler was characterized using synchronized thermocouples and infrared thermography, and the specific cooling(heating) power, temperature span, and coefficient of performance of up to 65(125) W·kg−1, 9.1 K, and 5.0, respectively were measured. The progressions of the temperature span, specific cooling(heating) power, and coefficient of performance with the operation cycle and temperature lift were analyzed. An energy analysis revealed that the heat transfer fluid carried out only 14% of the latent heat generated by the NiTi tube, which demonstrated a potential to enhance the cooling performance by the improvement in the regenerator structure.

High power laser heating of nuclear ceramics for the generation of controlled spatiotemporal gradients

The use of high-power lasers to reach the high temperatures typical for off-normal conditions in nuclear reactor fuel or to determine its properties at high temperature is a relevant and proven technique in the nuclear research community. Conducting studies at high temperature with full control in space and time of the thermal gradients is, however, a challenge. In this paper, we present a combination of methodologies, experiments, and models to drive nuclear fuel samples in thermal conditions relevant to the study of nuclear fuel materials. Based on the use of high-power (kW) lasers with beam shaping and temporal laser control, our experimental approach allows one to heat depleted UO2 samples and obtain precise control of the temporal gradients, in the ms range, and spatial gradients, in the 100 μm range. The coupling with numerical simulations allows one to determine the temperature distribution in the depth of the sample and to develop a thermo-mechanical interpretation of the results. We will present the methodology allowing one to properly compare experimental and simulation results by taking into account the optical response of the instrumentation, the laser–UO2 interaction, and the resulting heat source term. We will show that we can express the heat source term resulting from the laser loading either by an analytical description or statistically based on Monte-Carlo simulation. A fairly good agreement between the recorded temperature and the simulation results is shown. The presented methodology can be extended to other materials with a proper choice of laser wavelength and instrumentation based on the optical properties of the investigated material.

Fabrication of High-Temperature Polymer- Derived Ceramic Thin-Film Heat Flux Sensor by 3-D Printing and Laser Pyrolysis

Heat flux density is an important parameter for evaluating the high-temperature performance of turbine blades. Accurate heat flux density data play a significant role in the design and manufacture of turbine blades and their heat-dissipation performance. Current studies have shown that thin-film heat flux sensors (TFHFSs) are suitable for signal monitoring of complex turbine blade surfaces. However, TFHFSs have a multi-layer structure, which is difficult to achieve using traditional physical vapor deposition (PVD). In this paper, we propose an approach to fabricating high-temperature polymer-derived ceramic (PDC) TFHFSs using 3D printing and laser pyrolysis. Through direct ink writing (DIW), sensitive, antioxidant, and thermal resistance layers were written directly on an alumina substrate. The sensitive layer was rendered electrically conductive owing to laser-induced graphitization. Thus, the structure of multi-layer TFHFS can be quickly achieved using the proposed method. The results showed that the sensor can operate at 800 °C. Its sensitivity was 1.349 mV/(kW/m²). Thus, it is feasible to prepare thin-film heat flux sensors by 3D printing and laser pyrolysis, which provides a new in situ integrated manufacturing method for fabricating heat flux sensors suitable for working in harsh environments such as aviation.

Effects of Different Pre-Heating Welding Methods on the Temperature Field, Residual Stress and Deformation of a Q345C Steel Butt-Welded Joint

Heavy plate welding has been widely used in the construction of large projects and structures, in which the residual stress and deformation caused by the welding process are the key problems to address to reduce the stability and safety of the whole structure. Strengthening before welding is an important method to reduce the temperature gradient, control the residual stress and reduce the deformation of welds. Based on the ABAQUS software, the thermal elastoplastic finite element method (FEM) was used to simulate the welding thermal cycle, residual stress and deformation of low-alloy, high-strength steel joints. Based on the finite element simulation, the influences of flame heating and ceramic heating on the temperature field, residual stress distribution and deformation of a Q345C steel butt-welded joint were studied. The results showed that the thermal cycle of the ceramic sheet before welding had little influence on the whole weldment, but had great influence on the residual stress of the weldment. The results show that the maximum temperature and residual stress of the welded parts are obviously weakened under the heating of ceramic pieces, and the residual stress of the selected feature points is reduced by 5.88%, and the maximum temperature of the thermal cycle curve is reduced by 22.67%. At the same time, it was concluded that the weld shapes of the two were basically the same, but the weld seams heated by ceramic pieces had a better weld quality and microstructures through comparing the macro- and micro-structures between the welded parts heated by ceramic pieces and the simulated weld. Heating before welding, therefore, is an effective method to obtain a high weld quality with less residual stress and deformation.

Experimental investigation of a ceramic heat regenerator for heat recovery in a decentralized reversible ventilation system

The operational characteristics of decentralized, wall–mounted, ductless, reversible heat recovery ventilation unit (HRV) with a ceramic honeycomb stone for sensible thermal energy storage and recovery were investigated in a full-scale, long-term experiment. Parametric experimental studies were carried out to obtain the operation cycles, supply air temperature, thermal effectiveness and sensible heat recovery under real working conditions of the heating season in Dfb Koepper-Geige climate. An experimental study was carried out to obtain data for determining the characteristics of supply air temperature as a base for further effectiveness and thermal sensible energy calculation. For comprehensive evaluation of the HRV the three specific effectiveness has been established as the instantaneous (from 100 to 63%–67% for the external temperature of −3 and 10 °C respectively), the air supply cycle (80–81%) and the long-term operation (62–63%), as a new approach to operation characteristics in the form of equations easy to implement in HVAC simulation programs and calculation sheets for future building energy simulation, building energy performance calculations, complex and simple engineering calculations, etc. Preserved open and universal form of research procedure and proposed equations, as a directly applicable characteristics, enable effective engineering calculations and analyzes, and allow for determining the operational characteristics of other devices with analogous operating principles.

Uncertainty quantification by probabilistic analysis of circular fins

Abstract The temperature distribution and thermal Stresses induced by a temperature difference for steady state heat transfer in silicon carbide (SiC) ceramic tube heat exchanger with circular fins was computationally simulated by a finite element method and probabilistically evaluated in view of the several uncertainties in the performance parameters. Cumulative distribution functions and sensitivity factors were computed for the hoop stresses due to the structural and thermodynamic random variables. These results are used to identify the most critical design variables in order to optimize the design and make it cost effective. The probabilistic analysis leads to the selection of the appropriate measurements to be used in structural and heat transfer analysis and to the identification of both the most critical measurements and parameters.

Effect of Large Amplitude Thermal Cycles on Power Assemblies Based on Ceramic Heat Sink and Multilayer Pressureless Silver Sintering

The effect of large amplitude thermal cycles between -500C and 1800C on power assemblies based on pressureless sintering of successive silver layers on an Aluminium Nitride (AlN) heat sink is investigated. In order to evaluate the impact of various adhesion layers on AlN as well as the relative density of the current track layers, various configurations with silver cermet, TiNiAg and WNiAg adhesion layers and track layer relative density of 81 cermet as adhesion layer and a track layer with a high relative density of about 81 behaviour with a low delaminated area ratio (16 shear stress value (7 MPa) after 1000 thermal cycles. For this configuration, the surface analysis performed after the shear tests on 1000 cycles aged samples show that the fracture takes place at the interface between the die attach layer and the device as well as the interface between the die attach and the track layer. However, for all other tested configurations, the fracture surface analysis performed at the end of the cycling tests highlights that the interfaces between the adhesion layer and the sintered track layers or the AlN ceramic are the weakest points of the assembly. The relationship between cracks observed after the aging and the adhesion layer nature, the track layer density, the die attach thickness as well as the void presence in the die attach is discussed. Finally, main guidelines allowing achieving device to heat sink assemblies able to withstand large amplitude thermal cycles are proposed.

Boiling heat transfer study of Micro-Diamond coated surface using underwater explosion shock wave method

Pool boiling heat transfer experiments are performed on micro-diamond particles coated heating surface (DPC heating surface) and no-coated smooth surface on copper substrates. Here DPC heating surface is fabricated with the aid of underwater explosion shock wave. Experiments are conducted on the substrate surface area of 15 × 15 mm2 using distilled water as the working fluid. The substrate is fixed tightly on the heater block, which is embedded with ceramic cartridge heater of 1500 W. The influence of pool boiling heat transfer is experimentally studied over a range of surface roughness values with particles coated heating surface at atmospheric pressure. The obtained results of DPC surfaces are compared with that of the smooth bare copper surface. A remarkable enhancement of the critical heat flux (CHF) at lower wall superheat is observed on the DPC surfaces. The DPC surface is found to be effective in increasing the nucleate boiling and CHF

Rapid and Portable Detection of Hg and Cd in Grain Samples Based on Novel Catalytic Pyrolysis Composite Trap Coupled with Miniature Atomic Absorption Spectrometry.

As toxic metals, Hg and Cd are a concern for food safety and human health; their rapid and portable analysis is still a challenge. A portable and rapid Hg-Cd analyzer constructed from a metal-ceramic heater (MCH)-based electrothermal vaporizer (ETV), an on-line catalytic pyrolysis furnace (CPF), a composite Pt/Ni trap, and a homemade miniature atomic absorption spectrometer (AAS) was proposed for grain analysis in this work. To enhance sensitivity, a new folded light path was designed for simultaneous Hg and Cd analysis using charge coupled device (CCD) in AAS. To eliminate the grain matrix interference, a catalytic pyrolysis furnace with aluminum oxide fillers was utilized to couple with a composite Pt/Ni trap. The method limits of detection (LODs) were 1.1 μg/kg and 0.3 μg/kg for Hg and Cd using a 20 mg grain sample, fulfilling the real sample analysis to monitor the grain contamination quickly; linearity R2 > 0.995 was reached only using standard solution calibration, indicating the sample was free of grain matrix interference. The favorable analytical accuracy and precision were validated by analyzing real and certified reference material (CRM) grains with recoveries of 97-103% and 96-111% for Hg and Cd, respectively. The total analysis time was less than 5 min without sample digestion or use of any chemicals, and the instrumental size and power consumption were <14 kg and 270 W, respectively. Compared with other rapid methods, this newly designed Hg-Cd analyzer is proven to be simple, portable, and robust and is, thus, suitable to quickly monitor Hg and Cd contamination in the field to protect grain and food safety.

Pid-Based Bottle Shark Heart Heater Design and Development

Traditional medicines are ingredients or ingredients in the form of plant ingredients, animal ingredients, mineral ingredients, galenic preparations, or mixtures of these materials, which have been used for generations for treatment and can be applied according to the norms in force in society. Bottle shark (Centrophorus atromarginatus) has good prospects as a producer of liver oil; this fish is easy to catch and occurs in relatively large quantities in Indonesian waters. The catch rate until now is only 39% of its sustainable potential. Bottled shark liver oil contains 90% squalene, Vitamin A, and Omega, which are very useful for the human body as a supplement for heart disease and stomach ulcers and increase stamina and brain intelligence. The rapid Development of technology certainly benefits the people who use it. One example of today's use of technology is applying a technology system for the fisheries sector. This tool works automatically to monitor the processing of bottled shark livers. That way, fishermen don't have to worry about cloudy weather or things that will take longer than processing the shark liver bottle. This Bottle Shark Liver Heater uses temperatures at 31˚, 32˚, 33˚, 34˚, and 35˚. With PID (Proportional Integral Derivative) control, the quality of the Bottle Shark liver can be maintained. This tool is supported by a DS18B20 temperature sensor, Arduino uno, Relay, Ceramic Heater element, DC Fan, LCD 16X12, Power Supply, and Switch. It is hoped that the community, with this automatic system device, can make it easier to manage Bottle Shark Liver Oil.

Heat and mass transfer at the ignition of single and double gas hydrate powder flow in a reactor

This paper details the heat and mass transfer at the ignition patterns of single (methane) and double (methane-isopropanol) granulated hydrates in a heated air. The experiments were performed in a laboratory-scale combustion chamber in the form of an oblong reactor with free-falling powder of the gas hydrate granules. The air in the combustion chamber was heated by the walls with ceramic plate heaters. The variation ranges of the input parameters were chosen to match the capacities of modern energy generation systems. We established the ignition delay times of the gas hydrate granules, combustion regimes, and sizes of the flame zone behind moving granules. We also analyzed the joint influence of the gas hydrate granules on their ignition behavior. A model was developed to estimate the threshold boundary conditions of gas hydrate ignition in different-sized chambers, with variable hydrate component composition granule size. Gas hydrate dissociation rates were determined in different sections of the laboratory-scale combustion chamber. Thermal conditions were predicted in which gas hydrates consistently ignite in combustion chambers with minimum cooling of the chamber walls and minimum unburnt fuel.

Resonance, Rayleigh flows, and thermal choking: Compressible coolant states in porous electromagnetic heat exchangers

Electromagnetic (EM) heat exchangers (HX) are systems that convert EM energy into heat or mechanical work. One potential design consists of a porous lossy ceramic material heated by EM waves with a compressible gas coolant. EM heating of ceramics is nonlinear, since the loss factor is temperature dependent. Designing such EM HXs requires an understanding of coupling between temperature, the electric field, and gas dynamics at the pore scale. To mimic this microscale phenomenon, a single channel with a high-speed gas coolant in perfect thermal contact with a thin solid ceramic layer is considered, with an applied plane-wave electric field propagating normal to the channel walls. From a thin-domain asymptotic analysis, the conservation laws reduce to a Rayleigh flow in the gas coupled with averaged thermal energy conservation equations at leading order. The model predicts that the kinetic energy of the gas increases up to 12.5 times the inlet value when thermal runaway occurs in the ceramic region for the cases considered, and thermal choking is possible when the coolant reaches the sonic state. Local maxima of efficiency occur on a discrete set of ceramic thicknesses that correspond to Fabry–Bragg resonances of the electric field.

Efficient conversion of solar energy through a macroporous ceramic receiver coupling heat transfer and thermochemical reactions

The receiver/reactor engineering and radiative power distribution technology are still challenging the development and rapid upscaling of solar thermal conversion and storage processes. This study dealt with experimental investigations of thermochemical CO2-splitting process and systematically provided pioneer approaches for efficient conversion of solar energy through complex coupled numerical models of reactor and high-flux solar simulator. The radiative heat transport of high-flux concentrated solar energy throughout the macroporous reactor is performed considering the fluid flow and heat transfer phenomena. The system performance is demonstrated through experimental measurements combining numerical analysis. The thermal efficiency of the reactor is mainly influenced by the cavity wall insulation thermal conductivity, wall thickness, and cavity configuration. Most thermal losses along the receiver are localized at the fluid-solid heat flux transiting phases. Modifying the internal structure of the receiver, such as removing the aperture and further improving the model by hollowing the porous media, could induce 20% solar-to-thermal processing performance increment with higher temperature distribution using a cavity wall having thermal conductivity of 0.3 W/m·K. Beyond the experimental observations, the numerical analysis provided new insights into the solar receiver/reactor innovation strategy and redox material composition selectivity.