Reliability and Degradation of Solar PV Modules—Case Study of 19-Year-Old Polycrystalline Modules in Ghana
Reliability and Degradation of Solar PV Modules—Case Study of 19-Year-Old Polycrystalline Modules in Ghana
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太阳能光伏组件的可靠性和退化——加纳已有 19 年历史的多晶组件案例研究
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发表时间：
2017
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通讯作者：
Isaac A. Edwin
中科院分区：
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作者：
D. A. Quansah;M. Adaramola;G. Takyi;Isaac A. Edwin
在加纳Kwame Nkrumah科技大学（KNUST）太阳能应用实验室的混凝土屋顶上安装了十四（14）个机架式多晶模块，该实验室处于湿热环境中，在连续暴露于室外19年后进行了评估。使用目视检查清单记录模块的物理状态。通过电流-电压（I-V）表征和热成像对其进行进一步评估。发现模块处于良好的物理状态，除了正面上的一些气泡和电池边缘处的轻微变色/腐蚀。与参考值相比，在暴露期间观察到的模块性能下降为：标称功率（Pnom），21%至35%;短路电流（Isc），5.8%至11.7%;开路电压（Voc）3.6%至5.6%和填充因子（FF）11.9%至25.7%。希望这项研究将提供一些有用的信息，项目开发商，制造商和研究界的长期性能的光伏组件在加纳。
Fourteen (14) rack-mounted polycrystalline modules installed on the concrete roof of the solar energy applications laboratory at the Kwame Nkrumah University of Science and Technology (KNUST) in Ghana, a hot humid environment, were assessed after 19 years of continuous outdoor exposure. The physical state of the modules was documented using a visual inspection checklist. They were further assessed by current-voltage (I-V) characterization and thermal imaging. The modules were found to be in good physical state, except some bubbles on front side and minor discolouration/corrosion at edge of the cells. Compared with reference values, the performance decline of the modules observed over the exposure period was: nominal power (Pnom), 21% to 35%; short circuit current (Isc), 5.8% to 11.7%; open circuit voltage (Voc) 3.6% to 5.6% and 11.9% to 25.7% for fill factor (FF). It is hoped that this study will provide some helpful information to project developers, manufacturers and the research community on the long-term performance of PV modules in Ghana.