Synthesize and hygro-thermal performance analysis of novel APC-CaCl2 composite sorbent for low-grade heat recovery, storage, and utilization

Abstract

Thermochemical heat storage is considered as a promising technology to enhance the utilization of energy sources due to its high energy storage density and long-term heat storage potential. However, further development of such systems depends on the development of new advanced sorption materials. In this study, a novel composite sorbent that consists of aerated porous concrete (APC) and calcium chloride (CaCl2) is investigated. Besides, vermiculite-calcium chloride (V-CaCl2) and Zeolite were also employed in the developed reactor for performance comparison. According to the testing results, energy storage density of the system operating with APC-CaCl2, V-CaCl2, and Zeolite were found 186.9, 174.2, and 182.6 kWh/m(3), respectively.