Survey and Selection of Inorganic Salts for Application to Thermal Energy Storage.

摘要

Thirty-six inorganic single salts, 32binary salts,and 12ternary salts were evaluated for their applicability to thermal energy storage at temperatures from 200exp 0 C to 1000exp 0 C. The corrosive aspects of these salts are discussed briefly. The experimental methods used for evaluating the physical and thermal properties of fused salts are summarized. It was concluded that:alkali chlorides,fluorides,and a number of related binary and ternary salts are promising for thermal energy storage;with a few exceptions,inorganic salts in general show a very large increase in volume upon melting (up to 40percent) which must be tolerated by proper hardware design if molten salts are to be successfully used in the storage of thermal energy at high temperatures;available experimental data on properties of many salts (and especially on the binary and ternary systems) is deficient and not fully reliable in many cases;and further accurate property and corrosion studies are mandatory for the particular salts selected.