And you have this liquid alloy at 600 degrees centigrade, and it turns into a molten salt.
A new Spanish project will use molten salts to store heat from the Sun for up to 15 hours, so that the plant could potentially operate through the night.
Engineers are also investigating how to use molten salt itself as the heat-transfer fluid, reducing heat losses as well as capital costs.
Both power-tower and parabolic-trough systems can store thermal energy in the form of hot, molten salt.
The thermal technologies included high temperature over-burning, infrared destruction, plasma arc pyrolysis, molten salt destruction, supercritical water oxidation, in situ vitrification, and etc.
Some solar projects include vats of molten salt, which, once warmed by solar energy, retains heat.
