Abstract
Thermal energy storage devices are crucial elements, especially in systems employing renewable energy sources. Adsorption-type storages show promising features: high energy density and possibility to be operated for heat and cold release to the user. However, only a few experimental activities on prototypes can be found in literature, especially for low temperature heat storage (<100°C). In the present work, the design, realization and experimental characterization of a prototype using AQSOA FAM Z02/water as working pair are presented. A specific test set-up, characterised by the possibility of testing different adsorbers configuration, has been developed and an adsorber with 4.3kg of adsorbent material has been tested under cold storage, daily heat storage and seasonal heat storage operating modes. The prototype is able to store from 620Wh up to 1100Wh, with a maximum energy storage density of 280Wh/kg. The average power during the discharging phase ranges from 200W to 650W. Energy efficiencies obtained vary from 1.5 for daily heat storage to 0.3 for cold storage operation.
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