Solar Photovoltaic (PV) technology is an upcoming technology for harnessing solar power. The performances of the PV modules are affected by incident solar radiation and mainly due to the rise in surface temperature in the hot environmental conditions. To manage the PV module temperature, passive cooling technology is adopted in this work. The integration of phase change materials (PCMs) as a thermal regulating medium into the PV module’s rear surface is intended. Two inorganic hydrated salts, Sodium Carbonate Decahydrate (SCD) -Na₂CO₃.10H₂O and Magnesium Sulfate Heptahydrate (MSH) – MgSO₄.7H₂O are used to form the binary eutectic PCM. The binary eutectic PCM was integrated on the backside of the 25 W polycrystalline silicon PV module and tested for temperature regulation under the outdoor conditions of Kovilpatti (9°10′0′′N, 77°52′0′′E), Tamil Nadu, south India. The thermophysical properties of the eutectic PCM, including the latent heat of fusion and, temperature of phase change were estimated using Differential Scanning Calorimeter (DSC). The melting and freezing point of the 70:30 SCD-MSH eutectic mixture was 35.6 °C and 31.1 °C, respectively, with a latent heat value of 230.5 J/g. The PV-PCM system showed an instantaneous temperature reduction up to 7^°C with an increase of 1.21% in the daily average efficiency. An increase in the daily DC power output by 12.5% than the reference PV module is observed in the PV-PCM system.

太阳能光伏（PV）技术是一种利用太阳能的新兴技术。光伏组件的性能受入射太阳辐射的影响，并且主要归因于炎热环境条件下表面温度的升高。为了管理光伏组件的温度，这项工作采用了被动冷却技术。旨在将相变材料（PCM）作为热调节介质集成到PV模块的背面。两种无机水合盐，碳酸钠十水合物（SCD）-Na ₂ CO ₃ .10H ₂ O和硫酸镁七水合物（MSH）– MgSO ₄ .7H ₂O用于形成二元共晶PCM。二元共晶PCM集成在25 W多晶硅PV组件的背面，并在泰米尔纳德邦Kovilpatti（9°10′0′′N，77°52′0′′E）的室外条件下进行了温度调节测试，印度南部。使用差示扫描量热仪（DSC）估算了共晶PCM的热物理性质，包括熔化潜热和相变温度。70:30 SCD-MSH共晶混合物的熔点和凝固点分别为35.6°C和31.1°C，潜热值为230.5 J / g。PV-PCM系统的瞬时温度降低了7 ^°C的每日平均效率提高了1.21％。在PV-PCM系统中，可以看到每日直流输出功率比参考PV模块增加了12.5％。