Analytical modelling of PCM supercooling including recalescence for complete and partial heating/cooling cycles

Abstract Phase change material (PCM) experiencing supercooling and phase hysteresis are widely reported in the literature. However, only few studies model analytically such PCM, they mostly focus on either or hysteresis, but rarely both phenomena. Moreover, partial cycles, with an incomplete melting solidification, considered even if these processes occur frequently latent heat thermal energy storage (LHTES) systems. The objective of this study is to behaviour a PCM for complete cycles. developed method, based source term, enables recalescence process during solidification. Currently considered, influence cooling rate degree evaluated phenomenological approach. For different behavior between heating modelled “curve scale” already validated experimental validation carried out brick sample, monitoring flux temperature, which characterize greater mass compared direct scanning calorimeter (DSC) analysis. selected undergoing solidification PEG6000, polymer suitable domestic hot water (DHW) storage. Results show good agreement numerical results laws used range tested. modelling also satisfactory concerning experiments temperature plateaus. fails correctly represent after PCM. To conclude, accurately most studied. Investigations conditions influencing crystalline structure effect dynamic suggested improve modelling. needs be having higher degree, as sugar alcohols salt hydrates.