Simulation of water ingress into PV-modules: IEC-testing versus outdoor exposure
Simulation of water ingress into PV-modules: IEC-testing versus outdoor exposure
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DOI：
10.1016/j.solener.2015.03.007
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发表时间：
2015-05
期刊：
影响因子：
6.7
通讯作者：
P. Hülsmann;K. Weiß
中科院分区：
文献类型：
--
作者：
P. Hülsmann;K. Weiß
在本文中的水吸收的光伏组件的型式认证标准IEC 61215的耐候性测试过程中进行了模拟，并与在室外环境条件下的水的侵入。为此目的，分析基础材料，一种密封剂（伊娃）和一种背板（TPT）的水蒸气渗透性。在加速IEC测试期间和位于四个不同气候区域的室外测试场地，对光伏组件表面的微气候进行了监测。这些测量值用于基于FEM的水进入PV模块的模拟。结果显示了IEC测试条件下的吸水速度和吸水量，如湿热、湿度冻结和热循环测试，并与不同气候条件下的进水量进行了比较。可以说，IEC湿热测试在电池和玻璃之间的密封剂中引起的水浓度几乎是室外风化20年所能调节的水浓度的两倍。湿度冻结测试显示出类似的行为，甚至热循环测试也导致背板中的轻微吸水。
In this paper the water uptake by PV-modules during weathering tests of the type approval standard IEC 61215 was simulated and compared with the water ingress under ambient outdoor conditions. For this purpose, the base materials, one encapsulant (EVA) and one back sheet (TPT), were analyzed regarding their water vapor permeability. The micro climate a PV-module sees at its surface was monitored during accelerated IEC tests and at outdoor test sites located in four different climatic regions. These measured values were used for FEM based simulations of the water ingress into PV-modules. The results show the speed and the amount of water uptake under IEC-test conditions as damp heat, humidity freeze and thermal cycling tests compared with the water ingress under the different climates. It can be stated that the IEC-damp-heat test provokes almost two times higher water concentrations in the encapsulant between cell and glass than outdoor weathering can adjust over 20 years. The humidity freeze test shows a similar behavior and even the thermal cycling test results in a slightly water uptake in the back sheet.