| 초록 |
Concentrated solar power (CSP) is one of the renewable energy systems, which is expected to provide dispatchable energy supply for 24 hours, due to its large-scale heat energy storage system. To achieve dispatchability, thermochemical energy storage(TCES) system based on the reversible carbonation-calcination reaction of CaO-CaCO3 has been investigated. However, continuous reduction of reversibility limits the overall energy storage and discharge performances. In this study, calcium chloride-based additives were impregnated into CaO-CaCO3 systems, to enhance the carbonation reactivity as a solution for the reduction of reversibility. Primarily, the effects of calcium chloride additives were observed, then the fundamentals of effects were investigated by providing various Ca-based composites. As a result, new integrated Ca-based composites were suggested as solar absorbing and storage materials, which achieved high energy storage density and durability by enhanced reaction performance. Material analyses were mainly based on TG-DSC for reaction observation, and supported by various characterization techniques such as BET, in-situ XRD, SEM, etc. |
