Category: Transient Plane Source
Keywords: Enthalpy of fusion, Melting Temperature, Octadecane, potassium fluoride tetrahydrate-potassium fluoride dehydrate eutectic, potassium tetrahydrate, Thermal Conductivity, thermal energy storage, Thermophysical properties, Volumetric enthalpy
Abstract: In this study, potassium tetrahydrate is being considered as a strong thermal energy storage material. Potassium tetrahydrate possess a low melting temperature and displays a large specific and volumetric enthalpy of fusion; all properties desirable of a thermal energy storage material. At temperatures ranging from 243 to 348 K, both solid and liquid potassium tetrahydrate were tested. The results obtained were then compared to two other potential thermal energy storage materials, with similar melting points; octadecane and water. Moreover, the enthalpies of fusion, as well as the melting temperatures for potassium fluoride tetrahydrate were determined; deltaHfus = (246 ± 2) J·g–1 andTfus = 291.6 K. It was also determined that the enthalpies of fusion, as well as the melting temperatures for potassium fluoride tetrahydrate-potassium fluoride dehydrate eutectic were deltaHfus = (203 ± 2) J·g–1 and Tfus = 282.2 K, respectively.
Reference: Journal of Chemical Engineering Data, 2013, 58 (2), 294–300