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