Fig. 1

Flow chart for the preparation of CPCMs"

Fig. 2

Numerical model: (a) Model 1, (b) Model 2"

Table 1

Model 2 material thermal properties"

Fig. 3

Grid and time step validation: (a) and (b) the grid and time step validations for Model 1, (c) and (d) the grid and time step validations for Model 2"

Fig. 4

Schematic of the experimental test and temperature measurement point"

Fig. 5

Comparison and verification of numerical simulation and experimental test: (a) Temperature change of PW/SEBS/EG-2%, (b) Temperature change of PW/SEBS/EG-3%, (c) Temperature change of PW/SEBS/EG-4%, and (d) Temperature change of PW/SEBS/EG-5%"

Table 2

Thermal properties of CPCMs with different EG contents"

Fig. 6

Comparison of DSC curves and viscosity of samples before and after cyclic thermal stability test: (a) Comparison of DSC curves before and after cycling, (b) Sample without SEBS, (c) Sample with SEBS, and (d) Comparison of sample viscosity"

Fig. 7

Changes in heat storage capacity and complete melting time of heat storage units with different EG contents"

Fig. 8

Changes in the fraction of the liquid phase and temperature curves at the center point in the regenerative units with different EG contents: (a) Liquid fraction curve, (b) Temperature curve"

Fig. 9

Temperature and phase interface contours in heat storage units with different EG contents during the melting process: (a) Temperature contour, (b) Phase interface contour"

Fig. 10

Heat flux variation on the boundary of the thermal storage unit at different rotational speeds"

Fig. 11

Liquid phase fraction and temperature changes in the PW/SEBS/EG-5% heat storage unit across different fluid speeds: (a) Liquid fraction change, (b) Temperature change"

Fig. 12

Temperature and phase interface contours in the PW/SEBS/EG-5% heat storage unit at different fluid speeds: (a) Temperature contour, (b) Phase interface contour"