The phase change material (PCM) used in an ice storage system plays a crucial role in its performance. The PCM is typically a type of salt hydrate or paraffin wax that is mixed with water to form the ice storage medium. The PCM enhances the thermal energy storage capacity of the system by increasing the latent heat of fusion of the water. The choice of PCM can affect the system’s charging and discharging rates, as well as its overall efficiency and reliability.