研究目的
Investigating the influence of dew on soiling processes of photovoltaic (PV) modules and evaluating methods to mitigate soiling.
研究成果
The study demonstrates that dew significantly impacts particle adhesion and soiling rates on PV modules, independent of dust type. Heating glass surfaces during the night can reduce soiling by minimizing cementation, particle caking, and capillary aging. Preventing condensation is a viable method to mitigate soiling, especially in regions with frequent dew occurrence.
研究不足
The study's findings are based on specific environmental conditions in Qatar and may not be directly applicable to other regions with different dust types or climatic conditions. The effectiveness of heating as a soiling mitigation method requires further assessment of applicability and economic feasibility.
1：Experimental Design and Method Selection:
The study involved outdoor experiments in desert conditions in Qatar using unheated and heated glass samples with different heating powers, and laboratory soiling experiments with different dust types, controlled dust removal by centrifugal forces at different relative humidity levels, and defined dew cycles. Microstructural investigations using electron microscopy were performed to determine the cause of increased particle adhesion.
2：Sample Selection and Data Sources:
Glass samples were used for outdoor and laboratory experiments. Dust types included ESKAL20, ESKAL20-Plus, and ME Test Dust.
3：List of Experimental Equipment and Materials:
Equipment included a Nikon eclipse L200N microscope, Zeiss Axio Scope.A1 Vario light microscope, and a Hitachi SU70 scanning electron microscope (SEM).
4：Experimental Procedures and Operational Workflow:
Outdoor experiments involved exposing glass samples to desert conditions with varying heating powers. Laboratory experiments involved controlled dust deposition, dew cycles, and rotational force tests.
5：Data Analysis Methods:
Surface coverage was determined using ImageJ image analysis software. Microstructural investigations were performed using SEM.
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