A photovoltaic panel (PV) integrated with phase change materials (PCMs) is a system characterized by a simultaneous production of thermal and electrical energy. PCMs exploit the solid–liquid phase change to store latent heat. In addition, by cooling the PV panel, the electric conversion efficiency increases. This paper experimentally investigates the yearly performance of a PV-PCM system, coupled to a water tank, to provide thermal energy for the domestic hot water (DHW) service of a typical residential building. The solar radiation of a summer and an intermediate month has been reproduced under a solar simulator, while the performance in winter month has been tested outdoor under real conditions. A water circulation system, connected to a water tank, is activated to extract the stored heat, through a copper heat exchanger dipped in the PCM. Different tests are performed varying the size of the water tank storage. Results show that a storage volume of 50 L, 75 L, 100 L and 125 L ensure a reduction of 15.3 %, 21.2 %, 22 % and 21.5 % respectively, compared to traditional fully electric heaters. The same percentages turn out to be 8.2 %, 9.8 %, 10 % and 9.9 % during the intermediate month, while in winter the melting process of the PCM has not occurred. As regard only the PV-PCM and water tank system, the proposed system reached a maximum efficiency of 38 % under the summer climatic conditions and a minimum of 16 % under the winter ones.

与相变材料 (PCM) 集成的光伏面板 (PV) 是一种以同时产生热能和电能为特征的系统。PCM 利用固液相变来储存潜热。此外，通过冷却光伏面板，提高了电转换效率。本文通过实验研究了与水箱耦合的 PV-PCM 系统为典型住宅建筑的生活热水 (DHW) 服务提供热能的年度性能。在太阳模拟器下再现了夏季和中间月份的太阳辐射，而冬季月份的性能则在室外真实条件下进行了测试。连接到水箱的水循环系统被激活以通过浸入 PCM 中的铜热交换器提取储存的热量。进行不同的测试以改变水箱存储的大小。结果表明，与传统全电加热器相比，50 L、75 L、100 L 和 125 L 的存储容量分别确保减少 15.3 %、21.2 %、22 % 和 21.5 %。中间月份的相同百分比为 8.2%、9.8%、10% 和 9.9%，而在冬季没有发生 PCM 的熔化过程。仅就 PV-PCM 和水箱系统而言，建议的系统在夏季气候条件下达到 38% 的最大效率，在冬季气候条件下达到 16% 的最低效率。中间月份的相同百分比为 8.2%、9.8%、10% 和 9.9%，而在冬季没有发生 PCM 的熔化过程。仅就 PV-PCM 和水箱系统而言，建议的系统在夏季气候条件下达到 38% 的最大效率，在冬季气候条件下达到 16% 的最低效率。中间月份的相同百分比为 8.2%、9.8%、10% 和 9.9%，而在冬季没有发生 PCM 的熔化过程。仅就 PV-PCM 和水箱系统而言，建议的系统在夏季气候条件下达到 38% 的最大效率，在冬季气候条件下达到 16% 的最低效率。