Storage and release of heat in a single spherical capsule containing phase-change material with a high melting point

Abstract

A latent-heat thermal storage system using a packed bed is one of the most attractive recovery methods of periodically generated waste heat in industrial processes. The thermal performance of the system depends largely on that of a single spherical capsule containing phase-change material (PCM). In this study, PCMs were investigated as materials to recover and store heat for the temperature range between 500 and 1100 K. Some inorganic salts and metals were selected from the point of view of higher latent heat, chemical stability, nontoxicity, inexpensiveness. Heat storage and release experiments of single capsules under the condition of predominant convective heat transfer were carried out