Thermochemical heat storage: experimental characterization of materials and prototypes

The present paper deals with the experimental activity carried out at CNR-ITAE on two configurations of storages for seasonal heat accumulation. In particular, a commercial material (zeotype FAM Z02) and a composite sorbent (LiCl/vermiculite) were characterized and compared. Adsorption dynamics was evaluated through a Large Temperature Jump apparatus. The results were used to design lab-scale prototypes of the tow systems. Measurements indicated that FAM has a storage capacity up to 600 kJ/kg, while the composite has a storage capacity up to 1250 kJ/kg.