强化导热相变材料对PV/PCM热控特性影响研究

文章建立了光伏/相变材料(PV/PCM)太阳能热控系统二维模型,并根据模拟结果研究了相变材料热导率对太阳电池热控特性的影响。模拟结果表明,当PCM热导率由0.3 W/(m·K)逐渐增加至1.1 W/(m·K)时,相变材料对太阳电池的热控效果越来越好。此外,文章设计了PCM热导率分别为0.8,1.1 W/(m·K)的PV/PCM太阳能热控系统实验装置,在模拟光源和自然光条件下,对太阳能热控系统实验装置的输出功率以及太阳电池的温度进行测试。实验结果表明:在模拟光源下,与无PCM太阳电池相比,PCM热导率分别为0.8,1.1 W/(m·K)的太阳电池的最高温度分别降低了4.6,10.8℃,平均输出功率分别提高了2.2%,4.1%;在自然光条件下,与无PCM太阳电池相比,PCM热导率分别为0.8,1.1 W/(m·K)的太阳电池的最高温度分别降低了9.7,12℃,平均输出功率分别提高了3.1%,5.98%。

Research on the effect of enhanced thermal conductivity phase change material on the thermal control characterastics of PV/PCM

The effect of thermal conductivity of phase change material(PCM)on the thermal control characteristics of solar cells was studied by establishing a two-dimensional model of PV/PCM thermal control system.The results show that the thermal conductivity of PCM is in the range of 0.3~1.1 W/(m·K),and the better the thermal control effect of PCM on solar cells with the increase of thermal conductivity.In addition,a prototype PV/PCM solar thermal control system with thermal conductivity of 0.8,1.1 W/(m·K)was designed.Temperature and output power of solar cells in PV/PCM were measured under simulated light source and natural light conditions.The results show that under indoor simulated light source,the maximum temperature of solar cells decreases by 4.6,10.8℃respectively,and the average output power increases by 2.2%and 4.1%respectively,compared with that no PCM solar cells.Under natural light conditions,the maximum temperature of solar cells decreases by 9.7,12.0℃respectively,and the average power of solar cells increases by 3.1%and 5.98%,respectively.