Abstract
Salt hydrates of MgSO4, ZnSO4 and SrCl2 are promising materials for thermochemical heat storage applications. It is necessary to know the thermal conductivity of their hydrates in order to optimize heat storage systems. Therefore, the hydrates which occur as reaction products of a hydration were pressed into pellets and the thermal diffusivity was measured with the light flash method. To calculate the thermal conductivity, the heat capacity, which was determined by calorimetry, is also required. The method used to determine the thermal conductivity was verified with NaCl.MgSO4·7H2O, MgSO4·6H2O and ZnSO4·7H2O showed thermal conductivities of about 0.7Wm−1K−1, while SrCl2·6H2O reached 1.0Wm−1K−1.
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