The aim of this work was to investigate the influence of the composition of CaBr_2 + H_2O around CaBr_2 · 6H_2O and CaCl_2 + H_2O around CaCl_2 · 6H_2O on the maximum storage capacity via DSC. Thereby, the maximum storage capacity is determined in a temperature range of 15 K around the phase change, i.e. 30-45°C were identified for CaBr_2 + H_2O and 25-40°C for CaCl_2 + H_2O. In the case of CaBr_2 + H_2O, 9 different concentrations in a CaBr_2 concentration range of 2.6 wt% around CaBr_2·6H_2O were prepared. For the investigation of CaCl_2 + H_2O 10 different concentrations in a CaCl_2 concentration range of 3.7 wt% around CaCl_2 · 6H_2O were prepared. In both cases the concentrations were determined via combined determination of the water content via moisture analyser and determination of the respective salt concentration via titration.
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