Hello everyone
here is a very nice subject ...
Your Rémundo had calculated everything in 2008 with its PHRSD (hyperthermic trap of direct solar radiation). And he advocated using quartz silica.Words fly away, writings remain :
"hyperthermic solar traps have the advantage of allowing
large-scale thermal storage, efficient and inexpensive since it will suffice to heat to about
1000 ° C, using a heat transfer fluid and heat exchange tubes, a mass
large amount of materials with good thermal capacity: rock, earth, sand, metals, water, fluid
specific… These materials must be placed in containers using the principles of
manufacture of the insulating shell. The containers may possibly be buried
Source: PHRSD FAQ of 09/11/2008So what? Basalt, why not if it works with the intended service temperatures.
Well, I'm not jealous. I like the way they capture the sun's rays with the mirrors to send a beam of vertical parallel rays on the big lens which concentrates everything. If they have the means, let them go there cheerfully.Having said that, I have some doubts about the effectiveness in our cloudy countries: the downside to what uses direct solar radiation is it.
on the other hand, it could work wonders in the Mediterranean or in Africa.
and we fall back into the throes of the DESERTEC project, technically superb, but geopolitically complex.
In March 2008, almost 14 years ago,
I had put a scientific note on the PHRSD with beautiful illustrations provided by TOTO65, a forumst econologist of the time.
As Christophe also pointed out,
there was the Canadian experience of DLSC.CA, seasonal solar thermal storage that looked promising too, but at lower temperatures allowing only home heating.