PCM	Phase change material
HTPCM	High temperature phase change material
TES	Thermal energy storage
CSP	Concentrating solar power plant
HTF	Heat transfer fluid
FEM	Finite element method
RHBIM	Refined heat balance integral method
ODE	Ordinary differential equation
RPD	Relative percent difference
AEE	Average energy error
$k_{\ell }$	Thermal conductivity of the liquid
$k_s$	Thermal conductivity of the solid
${\alpha }_{\ell }$	Thermal diffusion constant of the liquid
${\alpha }_s$	Thermal diffusion constant of the solid
$C_{\ell }$	Specific heat capacity of the liquid
$C_s$	Specific heat capacity of the solid
${\rho }_{\ell }$	Liquid density
${\rho }_s$	Solid density
$x_s\left(t\right)$	Position of the right boundary
$x_{\ell }\left(t\right)$	Position of the left boundary
$L\left(t\right)$	System size
$\mathsf{\xi }\left(t\right)$	Liquid-solid interface position
$\Delta M_s$	Mass of melted solid
$\Delta M_{\ell }$	Mass of solidified liquid
$f_s$	Mass fraction of melted solid
$f_{\ell }$	Mass fraction of solidified liquid
$\Delta h$	Absorbed/released enthalpy
Q	Absorbed/released thermal energy
$L_f$	Bulk latent heat
$L_f^{*}$	Apparent latent heat
$T_m$	Melting temperature
$M\left(0\right)$	Initial mass of the system
$T_C$	Temperature at the right boundary
$T_H$	Temperature at the left boundary
$\Delta L_{\mathrm{eq}}$	Volume change at thermodynamic equilibrium
$f_{s_{\mathrm{eq}}}$	Fraction of melted solid at thermodynamic equilibrium
$f_{{\ell }_{\mathrm{eq}}}$	Fraction of solidified liquid at thermodynamic equilibrium
$\Delta U$	Absorbed/released latent heat at thermodynamic equilibrium