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A comment on A molten salt storage solution using sodium hydroxide. Parent comment

Re:A molten salt storage solution using sodium hydroxide by BenoitEssiambre on Thursday December 09, 2021 @08:12PM (#29505305)
A quick back of the envelope calculation: A 6.5 feet by 6.5 feet cube (2mx2m) could store about 4500kWh at 1000C, this seems close to energy need for heating for more than a month ( Energy density of fireclay from here: https://www.engineeringtoolbox.com/sensible-heat-storage-d_1... ).

That's a very large amount of bricks and a potentially dangerously high temperature but still...

Pottery kiln manufacturers might be able to design this? Kilns go to higher temp than this and are used indoors.

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Re:A molten salt storage solution using sodium hydroxide by pfdietz on Thursday December 09, 2021 @08:54PM (#29505579)
Firebrick energy storage has been proposed! If one uses SiC bricks, which might act as their own resistive heaters, one could operate up to 1800 C.
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Re:A molten salt storage solution using sodium hydroxide by BenoitEssiambre on Friday December 10, 2021 @09:15PM (#29517785)
That's cool if the bricks themselves can be resistive heaters. You might burn elements pretty quickly at those temps.
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Re:A molten salt storage solution using sodium hydroxide by pfdietz on Friday December 10, 2021 @09:52PM (#29517973)
Right. The ordinary firebrick system with separate heaters would be limited to about 1000 C, although I've seen a concept using sand flowing through a heater that would reach 1200 C.
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