Gordon-Loomberah wrote:........ the salt becoming solid isn't really a problem, as it is only being used to store the heat, and it would be heated via a heat exchanger, with some high BP liquid being used to transfer the energy from the concentrated solar hot spot to the salt.....
Not sure that is the reality...! With the plant shown being run up, they were draining liquid salt from a pipe .. down at the working end..
That suggested to moi , that the design was more like a solar HW collector and a circulating pump..
My assumption.... if the salt cooled in the feed lines, then that will be it for the plant..
(Unless it could be dissolved by progressive washing/dissolving) ..
I would have thought that the best design would be for the thermal mass tank, containing the salt mass, was at the head of the collector.. ie -- no plumbing for molten salt... thus no chance of a plant catastrophe ..
On the thought of your comment......., what high BP liquid could you use that would "transfer heat" to solid salt.. ie.. I am thinking that molten salt would be "glowing"
PS ... the reference to the plant you suggested , represents what I saw in practice... so IF it all relies on the salt to remain molten , then I fail to see how it all works, other than molten salt being a very high temperature medium , but then you lose all advantage of phase change...
I do suppose that molten salt could be drained from the working plumbing, and perhaps as depicted, (but poorly described), there is a molten reservoir that is kept as such to "prime " a cooled system...
Retired Engineer and keen PV experimenter - Always ready to learn and share.
2 x CMS2000 (fan cooled) GCI and SE 170W panels
1.7kW First Solar/Outback Island circuit - Peak Replacement Power
Governments won't save the world
They will just TAX it