查看文章

Thermochemical heat storage materials for space heating applications such as, ZnSO₄ offer high energy storage density, low cost and clean mean of long-term solar energy storage. Herein, we studied the ZnSO₄ hydrated salt as potential heat storage material at low temperature and furthermore observed the impact of temperature and concentration on the dehydration/hydration process and enthalpy. The thermal behavior of ZnSO₄•7H₂O was investigated by applying various dehydration temperatures. The results showed that 85% of water loosed at 100 °C temperature, which released 699 J/g (1.37 GJ/m³) in the dehydration process. The hydration process of ZnSO₄.7H₂O at 100 °C recovered 541 J/g enthalpies, which delivered 1.1 GJ/m³. Similarly, the dehydration result obtained at 150 °C was the same as showed at 100 °C. However, the enthalpy of hydration was 20% less than prior. The XRD result …