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For SpaceNut ... we already have three pages of topics with the word "solar" in the title...
To my surprise, none of them are about the subject of this post.
The article at the link below is about an installation in Australia that uses heliostats to focus light on a tower mirror that directs the energy at a receiver on the ground. This is a change from the Spanish design, which used a heating chamber at the top of a tower.
https://www.msn.com/en-us/money/markets … 9695&ei=33
The application the developers are using the power for is electrolysis of water to yield hydrogen, but the process uses a technique that might be new to some readers.
The design differs from traditional solar thermal systems, which focus sunlight at the top of a tower. Instead, it reflects sunlight downwards onto a ground-level platform, akin to the effect of a magnifying glass but on a larger scale. A field of heliostats reflects sunlight onto a tower, which redirects it into a solar reactor. There, intense heat drives a reaction that splits water into hydrogen and oxygen.
Solar reactor milestone
The production of green hydrogen using CSIRO’s new beam-down solar reactor relies on a key material: doped ceria, a modified form of the naturally occurring mineral ceria.Doped ceria, designed to take in and give off oxygen at reduced temperatures, facilitates a two-step thermochemical process for splitting water. The substance emits oxygen atoms when it is heated by concentrated solar energy. Upon the introduction of steam, the particles take in oxygen from water molecules, releasing hydrogen gas. This hydrogen can then be captured for fuel or industrial applications. The doped ceria is reusable, making the process both efficient and sustainable.
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