研究目的
Comparing the optical reflection losses, thermal losses, and electricity production of PV modules under moderate (AM1.5) and desert-like spectrums (AM1.0).
研究成果
PV modules in desert spectrum benefit from about 5% extra power gain while they produce 7.2% extra heat and 5% extra reflections. The highest heat sources are thermalization under both spectrums with an average of 29.5% of the total incoming power density in both regions. The most considerable change of losses from desert to moderate region is absorption in polymer encapsulant with extra 24.3% rel. losses and resistive losses in cell and module interconnection with 21.3% rel. losses respectively.
研究不足
The comparison is just in steady state conditions with the most possible power density. Factors like ambient temperature, humidity, and wind loads, which influence the service life and yield of the module, are not considered in this study.
1：Experimental Design and Method Selection:
The study uses an optical-electrical model to determine the optical reflections, heat sources, and electricity production of PV modules under two different spectrums (moderate and desert).
2：Sample Selection and Data Sources:
A single cell mini-module made from solar glass with 4 mm thickness and anti-reflection coating, standard EVA with UV cut-off and UV blocker, and a selective emitter mono-crystalline solar cell.
3：List of Experimental Equipment and Materials:
Perkin Elmer Lambda 1050 spectrometer equipped with an integrating sphere from 200 nm to 2200 nm.
4：Experimental Procedures and Operational Workflow:
Optical measurement of all module components and electrical measurement of solar cells and modules. The electrical and optical characteristics of a single cell mini-module are characterized electrically before and after module fabrication.
5：Data Analysis Methods:
An optical-electrical model is used to determine the optical reflections, heat sources, and electricity production under two spectrums.
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