研究目的
To investigate the possibility of evaluating the color changes in real photovoltaic modules from re?ectance measurements and to explore the use of re?ectance and Yellowness Index (YI) as an indicator of PV solar module surface color change and degradation.
研究成果
The study concludes that portable ?ber optic spectrometers and simple ?ber optic probes can be effectively used for measuring re?ectance and Yellowness Index in PV modules, indicating surface color changes and degradation. Yellowness Index is found to be a good indicator of changes in appearance in PV modules, with a correlation observed between Yellowness Index increase and ultraviolet dose, as well as a reduction in maximum power.
研究不足
The study acknowledges the complexity of performing measurements on real PV modules without disassembling them and the difficulty in generalizing a model that relates PV module degradation with the degradation of a single component. The use of simplified instrumentation and techniques may also introduce limitations in the accuracy and applicability of the measurements.
1：Experimental Design and Method Selection:
The study explores the use of re?ectance and Yellowness Index (YI) as indicators of PV solar module surface color change and degradation. It tests the correctness of using simpli?ed measurement geometries and portable spectrometers.
2：Sample Selection and Data Sources:
Two types of samples were used: an aged monocrystalline PV module and a conventional polycrystalline PV module. The aged module was chosen for its differential color surfaces, and the polycrystalline module was submitted to an ultraviolet degradation test.
3：List of Experimental Equipment and Materials:
Instruments used include AvaSpec-ULS2048L for 45°/45° re?ectance measurements, re?ectance probe holder RPH-1, light source AvaLight-DHc, and a spectrophotomer Perkin Elmer Lambda 900 with a 150 mm integrating sphere for hemispheric re?ectance measurement.
4：Experimental Procedures and Operational Workflow:
The study involved measuring re?ectance at different geometries and calculating Yellowness Index to evaluate color changes and degradation in PV modules. The polycrystalline module was subjected to UV degradation tests with control measurements at various UV doses.
5：Data Analysis Methods:
Yellowness Index was calculated from re?ectance measurements using standard procedures, and its correlation with UV dose and maximum power loss was analyzed.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
