Fig. 1

The encapsulation unit of phase change material and the thermal storage filled bed device schematic diagram: (a) Phase change material encapsulation unit; (b) Three-dimensional schematic of the thermal storage filled bed device (partial section); (c) Structural schematic of the thermal storage filled bed device"

Fig. 2

The schematic of the experimental test system of hydrated salt thermal storage device: (a) Schematic diagram of the thermal storage device experimental system; (b) physical photo of the thermal storage device experimental system"

Fig. 3

Schematic diagram of temperature measurement point arrangement in heat storage/release experiments for thermal storage device: (a) Overall scheme of temperature measurement point layout in the packed bed; (b) Schematic diagram of temperature measurement point locations in the phase change unit; (c) Schematic diagram of temperature measurement point locations in the fluid region"

Fig. 4

Temperature variation in the vertical direction during the heat chargingstorage/release discharging process of phase change units(12 L/min): (a) Charging process; (b) Discharging process"

Fig. 5

Temperature variation in the vertical fluid domain during the heat charging/discharging process: (a) Charging process; (b) Discharging process"

Fig. 6

The temperature of the outlet of the thermal storage device in different thermal storage temperatures: (a) Charging process; (b) Discharging process"

Fig. 7

Thermal storage performance of the thermal storage device in different thermal storage temperatures"

Fig. 8

The temperature of the outlet of the thermal storage device in different flow rates"

Fig. 9

Thermal storage performance of the thermal storage device at different flow rates"