Abrasion of PV Antireflective Coatings by Robot Cleaning

IF 2.5 3区工程技术 Q3 ENERGY & FUELS

IEEE Journal of Photovoltaics Pub Date : 2024-06-21 DOI:10.1109/JPHOTOV.2024.3414192

Benjamin Figgis;Amir Abdallah;Maulid Kivambe;Ayman Samara;Brahim Aïssa;Juan Lopez Garcia;Veronica Bermudez

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Abstract

The growing use of photovoltaic (PV) cleaning machines (“robots”) raises the risk of abrasion to the antireflective coating (ARC) on modules’ front glass. ARC abrasion is often studied via accelerated lab tests, however field tests are needed to achieve real-world abrasion conditions. In this study nine types of PV modules and five types of ARC coupons were subjected to 18 months of dry-brush robot cleaning in the desert climate of Doha, Qatar. Three cleaning schedules were tested: daily, weekly, and never (reference samples subject to weathering alone). Modules’ power (Pmax), current (Isc), and reflectivity changes were measured and compared between the various cleaning schedules. It was found that the abrasion resistance of PV modules varied greatly. Five kinds of module showed greater losses with more frequent cleaning, while the other four did not. Lab profilometry of the coupons similarly found large variability of the depth and quantity of scratches for different ARCs, because of the difference in ARC durability between modules, and the likelihood that different cleaning robots will vary in their harshness, it is recommended to test specific robot/module pairs in the field to be confident of their ARC degradation rate.

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机器人清洁对光伏减反射涂层的磨损

光伏（PV）清洁机器（"机器人"）的使用越来越多，这增加了组件前玻璃上抗反射涂层（ARC）的磨损风险。ARC 磨损通常是通过实验室加速测试进行研究的，但要实现真实世界的磨损条件，还需要进行现场测试。在这项研究中，九种类型的光伏组件和五种类型的 ARC 样品在卡塔尔多哈的沙漠气候中接受了 18 个月的干刷机器人清洁。测试了三种清洁时间表：每天、每周和从不（参考样品仅受风化）。测量了模块的功率（Pmax）、电流（Isc）和反射率的变化，并对不同清洁计划进行了比较。结果发现，光伏组件的耐磨性差别很大。有五种组件在清洁频率增加时出现更大的损耗，而其他四种则没有。由于组件之间的 ARC 耐久性存在差异，而且不同清洁机器人的苛刻程度也可能不同，因此建议在现场测试特定的机器人/组件对，以确定它们的 ARC 退化率。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Journal of Photovoltaics ENERGY & FUELS-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

7.00

自引率

10.00%

发文量

206

期刊介绍： The IEEE Journal of Photovoltaics is a peer-reviewed, archival publication reporting original and significant research results that advance the field of photovoltaics (PV). The PV field is diverse in its science base ranging from semiconductor and PV device physics to optics and the materials sciences. The journal publishes articles that connect this science base to PV science and technology. The intent is to publish original research results that are of primary interest to the photovoltaic specialist. The scope of the IEEE J. Photovoltaics incorporates: fundamentals and new concepts of PV conversion, including those based on nanostructured materials, low-dimensional physics, multiple charge generation, up/down converters, thermophotovoltaics, hot-carrier effects, plasmonics, metamorphic materials, luminescent concentrators, and rectennas; Si-based PV, including new cell designs, crystalline and non-crystalline Si, passivation, characterization and Si crystal growth; polycrystalline, amorphous and crystalline thin-film solar cell materials, including PV structures and solar cells based on II-VI, chalcopyrite, Si and other thin film absorbers; III-V PV materials, heterostructures, multijunction devices and concentrator PV; optics for light trapping, reflection control and concentration; organic PV including polymer, hybrid and dye sensitized solar cells; space PV including cell materials and PV devices, defects and reliability, environmental effects and protective materials; PV modeling and characterization methods; and other aspects of PV, including modules, power conditioning, inverters, balance-of-systems components, monitoring, analyses and simulations, and supporting PV module standards and measurements. Tutorial and review papers on these subjects are also published and occasionally special issues are published to treat particular areas in more depth and breadth.