That higher temp is the issue.
Mineral oils would struggle I think, but molten salt might span that but maybe not 200 to 600.
Why do you want to get so low a temp? There's are many waste heat sources which can that. Most energy stores want to produce electricity using steam.
So, excess energy...
Yes, sand is the thermal energy store material. It's how to extract usable heat without going anywhere near steam temperatures and pressure systems regs.
Hi All
Let's say I have an abundant heat store ranging from 200 deg C up to 600 deg C. What materials should I be looking at that are resistant to the high temperatures in the energy store, in order to reduce the temperature down to a usable 60-70 deg C water circuit in copper ?
Are there any...