Melting time Heat storage 4 Melting 4 Phase change materials 4 Thermal Performance 3 Energy storage 2 Fins (heat exchange) 2 Phase change material 2 Thermal energy 2 Thermal energy storage 2 Tubes (components) 2 'current 1 Annular fin 1 Bejan number 1 CFD 1 Clinker cooling 1 Computational fluid dynamics 1 Cylindrical tubes 1 Digital storage 1 Discharge 1 Double-tube heat exchanger 1 Entropy 1 Entropy generation 1 Fin spacing 1 Finite volume method 1 Fins 1 Flow of fluids 1 Fluid-dynamics approach 1 Grid annular fin 1 Grid fin 1