Christophe wrote:sicetaitsimple wrote:You can only store heat via steam by operating the system at high pressure, it is necessarily "dead"
So with very significant efforts on the large tank ... hence their choice of carrier air?
Yes, basically that's it.
You cannot combine very high temperatures and very high pressures, otherwise you fall into creep problems (decrease in the mechanical strength of alloys in the long term).
Today no steam generator in the world operates above 620 ° C. And gas turbines, which operate at 1400/1500 ° C at the turbine inlet for the most modern, is "consumable", every 3 years or so parts subject to the most difficult conditions are replaced (combustion chambers, first turbine stages).