sensible heat thermal energy storage shtes has been proven to reduce csp capital costs and as a result several new installations have implemented shtes the disadvantages of shtes include the large quantities of salt medium required to store the thermal energy the two correspondingly large storage tanks as well as the risk of solidification of the salt if the temperature within the storage tanks drops below the salts freezing point mills latent heat thermal energy storage lhtes is of particular interest because it stores thermal energy through solidliquid phase changes and when compounds with a high heat of fusion are used it requires less storage medium relative to shtes reducing capital and construction costs