MgSO_(4)溶液浓度对MgSO_(4)-4A沸石储热材料性能的影响

Effect of MgSO_(4) solution concentration on the performance of MgSO_(4)-4A zeolite heat storage material

相比于显热储热与潜热储热,热化学储热有着储热密度高,热能损失少等优点。作为热化学储热的一种,吸附储热通过吸附剂对吸附质的解吸附和吸附过程实现热能的储存与释放。MgSO_(4)作为一种稳定、无毒、廉价的无机盐,其水合反应释放的水合热包含着大量热能。但考虑到MgSO_(4)纯盐易潮解的缺点,将其储存于多孔载体4A沸石中制得复合储热材料,可以大大减少盐分的损失。结果表明:制备复合储热材料所用的MgSO_(4)溶液浓度增大时,4A沸石中搭载的MgSO_(4)含量会随之增大,其储热密度也相应提升,这也使得复合储热材料应用于建筑供暖成为可能。

Compared with sensible heat storage and latent heat storage, thermochemical heat storage has the advantages of high heat storage density and less thermal energy loss. As a kind of thermochemical heat storage, adsorption heat storage realizes the storage and release of thermal energy through the process of desorption and adsorption of adsorbates by adsorbents. MgSO_(4)is a stable, non-toxic and cheap inorganic salt, and the heat of hydration released by its hydration reaction contains a lot of heat energy. However, considering the shortcomings of MgSO_(4)pure salt that is easy to deliquesce, the composite heat storage material is prepared by storing it in the porous carrier 4A zeolite, which can greatly reduce the loss of salt. The results show that when the concentration of the MgSO_(4)solution used to prepare the composite heat storage material increases, the MgSO_(4)content carried in the 4A zeolite will increase, and its heat storage density will increase accordingly, which also makes the application of composite heat storage materials for building heating possible.