A comprehensive review on building integrated phase change floors with phase change materials for energy storage and indoor environment control

Phase change floor (PCF) integrated with phase change materials (PCMs) can achieve latent heat storage, reduce system energy consumption, and improve indoor thermal comfort. Many studies have conducted extensive work from various perspectives with the continuous advancement in research on PCF. Therefore, a review of the relevant research on PCF is provided. It categorizes PCF based on its applications and integration methods. The PCMs used for PCFs are summarized in more detail, including thermophysical parameters and some mechanical properties. The influence of structural optimization design on the performance of PCFs is emphasized. Studies on PCF operating conditions, control strategies, and climate suitability are also described. The numerous evaluation parameters for PCFs are sorted out from three perspectives: thermal comfort, energy and economy. Common experimental and simulation methods for PCF have also received attention. The review makes it evident that the phase change temperature, thermal conductivity, and latent heat of PCMs are crucial factors influencing the performance of PCFs. The distinctive structural design can significantly enhance heat transfer and realize the use of PCFs in both winter and summer. Appropriate operating conditions and control strategies represent effective means of enhancing indoor thermal comfort and improving operating economics. The given reference ranges for PCM thermophysical properties, structural dimensions, and various operating parameters can also be utilized as a guide for engineering design. Additionally, the review also points out the challenges faced in PCF research and provides prospects for future research.