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Result of a 3D-Printed solar receiver of honeycomb mesh shows the heat distribution through the tubes carrying the air that acts as heat transfer fluid IMAGE©OmarBehar, KAUST A 3D-Printed solar receiver could solve some problems holding back a new technology: High-temperature solar receivers – for solar thermochemistry and industrial heat – can be prone to …
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Abstract Direct air capture (DAC) of CO2 has gained attention as a sustainable carbon source. One of the most promising technologies currently available is liquid solvent DAC (L-DAC), but the significant fraction of fossil CO2 in the output stream hinders its utilization in carbon-neutral fuels and chemicals. Fossil CO2 is generated and captured during the …
Abstract Ammonia synthesis via the catalytic Haber–Bosch process is characterized by its high pressures and low single-pass conversions, as well as by the energy-intensive production of the precursors H2 and N2 and their concomitant greenhouse gas emissions. Alternatively, thermochemical cycles based on metal nitrides stand as a promising pathway to green ammonia production because they …
Abstract Hydrogen holds promise as a clean energy carrier, but its industrial utilization is currently constrained by the challenges of green production and efficient cross-regional delivery. To this end, a novel integrated hydrogen energy system considering the solar-driven biomass gasification and liquid organic hydrogen storage was developed in this work. In the newly developed system, …
Abstract The van’t Hoff method is a standard approach for determining reaction enthalpies and entropies, e.g., in the thermochemical reduction of oxides, which is an important process for solar thermochemical fuels and numerous other applications. However, by analyzing the oxygen partial pressure pO2, e.g., as measured by thermogravimetric analysis (TGA), this method convolutes the properties …
Solar-heated cement calcining: “This is the key point: not only are we addressing carbon emissions from the heat input, which is traditionally supplied by fossil fuels, we’re also addressing the CO2 naturally liberated from calcining the calcium carbonate.” Solar-heated cement calcining – aided by the greenhouse effect? Researchers at Sandia National Laboratories are advancing a …
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Abstract: Solar cavity receivers are a crucial technology to transform solar energy into easily usable thermal energy. Various cavity receiver structures employing helical absorber tubes were investigated to provide either superheated steam or hot air efficiently. However, few studies have focused on receivers that generate both hot fluids simultaneously. The simultanoues generation can lead to …
IMAGE©Chemical Potential Analysis as an Alternative to the van’t Hoff Method: Hypothetical Limits of Solar Thermochemical Hydrogen. Could the Chemical Potential Analysis method work better than the van’t Hoff method? NREL’s Stephan Lany proposes a new common language to help solar thermochemistry researchers select the redox materials that will most efficiently generate green hydrogen. He …
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Storage tank failure has long bedeviled the oil and gas industry. But there the liquids are not stored at such high temperatures as for concentrated solar thermal energy storage, with its daily heating and cooling cycles One of the failure mechanisms in the steel used in CST and CSP plants’ thermal energy storage tanks has …
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After the solar heat trap experiment measuring the temperature increase to 1050°C at the back of the solar receiver inside a solid block of quartz, even at the front, the temperature measured 450°C IMAGE©Solar thermal trapping at 1,000C and above. Solar receiver efficiency in concentrated solar thermal (CST) energy is determined by how much solar …
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