###### Abstract
[PERSON] [11] embedded the PCM into gypsum boards to create \"sandwich\"-structured phase change energy storage gypsum boards. [PERSON] [12] and [PERSON] [13] investigated the melting process of PCMs in plate energy storage units, taking into account multiple factors including material properties and encapsulation structures. The encapsulation methods for PCMs primarily include direct mixing, macroscopic encapsulation, microscopic encapsulation, and shape-stabilized encapsulation. Among these methods, macroscopic encapsulation [14] stands out, as it maximizes the preservation of the inherent thermophysical properties of PCMs, thereby avoiding performance degradation. Additionally, macroscopic encapsulation offers larger encapsulation volumes and higher energy storage densities, leading to more effective energy storage. Moreover, it is relatively cost-effective compared to other encapsulation methods. Currently, research on the utilization of PCMs in building walls is increasingly abundant. [PERSON] [15] proposed a phase change wall that can switch positions with the internal insulation layer. This design can save 89% of the energy required for heating during a severely cold winter. [PERSON] [16] calculated the heat storage and release capacity of phase change walls on sunny and cloudy days. The results confirmed the positive role of PCMs in long-term improvements of the thermal environment inside greenhouses. [PERSON] [17] studied the impact of phase change layers at different positions within walls under various climate conditions. It can be concluded that in non-air-conditioned indoor spaces, the phase change layer is most effective when placed near the inner surface of the wall. [PERSON] [18] proposed a phase change wall composed of an insulation layer, a phase change layer, and insulating materials, and determined the phase change temperature of the PCM to maximize energy savings. The results showed that this wall can effectively reduce the peak heating and cooling loads throughout the year. [PERSON] [19] proposed a solar phase change wall with dual channels and intermediate insulation that enables passive solar heating and cooling. It was found that the phase change wall delayed the occurrence of peak temperature and reduced the peak temperature. [PERSON] [20] developed a heat transfer model for the melting and solidification process of PCM-filled brick walls and conducteda numerical analysis of the thermal response of the wall. The results showed that under fluctuating outdoor temperature conditions, the PCM effectively enhanced the heat storage capacity of the brick wall and improved indoor thermal comfort. This study, based on the climatic characteristics of the Hainan region, prepared paraffin/butyl stearate composite PCMs with suitable phase change temperatures using a melt blending method. Aluminum boxes were used to encapsulate the PCMs, and non-penetrating pin-shaped aluminum rods were incorporated. These structures form aluminum alloy phase change panels, which were applied to the inner side of exterior walls. Thermal experiments under different working conditions were conducted to explore the heat transfer process and mechanism of the phase change panels, the role of the pin-shaped aluminum rods, and the practical application effects of the phase change panels. Unlike previous studies on phase change wall panels, this study developed composite PCMs with adjustable phase change temperatures, making them applicable in various scenarios. Additionally, using aluminum boxes to encapsulate the PCMs simultaneously addresses the issues of liquid phase leakage and low thermal conductivity of solid-liquid PCMs. The study results provide new experimental insights for the performance regulation of PCMs and the optimization design of phase change wall panels.