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Dusting-and-DC-Power-Optimizers-on-PV-Systems.pptx
- 1. Dusting and DC PowerOptimizers on PV Systems Study on dust removal and DC optimizer effects on PV panels. Conducted in Northern Germany at University of Oldenburg Energy Lab.
- 2. Dusting Effects onPV Output 1 Shielding Reduces glass transmittance, lowering solar irradiance received. 2 Temperature Creates hot spots from uneven sunlight absorption. 3 Corrosion Uneven glass surface increases diffuse reflection.
- 3. PV Panel Efficiency Definition Ratioof power output to incoming solar irradiance. Formula η = P output / (G * A) Importance Normalized indicator for comparing performance under different conditions.
- 4. Soiling Ratio 1 Definition Ratioof dirty panel output to clean panel output. 2 Formula SR = P dust / P clean 3 Interpretation Values between 0 and 1, lower indicates worse performance.
- 5. DC Power Optimizers Purpose Enhancesolar panel efficiency by ensuring maximum power output. Function Operate each panel at its Maximum Power Point. Benefits Improve performance under shading or misalignment conditions.
- 6. Experimental Setup Array Configuration Eightmodules in two arrays, with/without optimizers. Irradiance Measurement Adjacent PV cell recording at one- minute intervals. Data Acquisition Inverter sending data to cloud server every five minutes.
- 7. Cleaning Procedure Initial State Panelsuncleaned for almost a year. Process Water and mild soap solution, microfiber towel drying. Schedule Progressive cleaning over several days. Final State All visible dust removed, plants causing shadows cleared.
- 8. Efficiency Results Time DirtyPanels Clean Panels Morning Higher efficiency Lower efficiency Afternoon Lower efficiency Higher efficiency
- 9. Soiling Ratio Analysis DailyProfile SR higher in morning, lower in afternoon for dirty panels. Progressive Cleaning SR decreased as more panels were cleaned. Optimizer Effect Panels with optimizers showed higher SR under dusting conditions.
- 10. Conclusions and Limitations 1 UnexpectedResults Dirty panels outperformed clean ones in mornings. 2 Optimizer Impact Improved performance under dusting conditions. 3 Limitations Short study duration, potential temperature effects not measured.