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P.V. Panel wind load effects

This document presents a comprehensive review of the design and experimental methodologies for assessing wind load effects on photovoltaic (PV) panels. It includes insights from wind-tunnel testing, preliminary modeling in CAD, and advances in computational fluid dynamics (CFD). The findings highlight the ideal angle of inclination, challenges in lab setup, and the complexities of measurement methods. Future steps include developing experimental models and refining CFD analyses to improve accuracy and reliability in wind load assessments.

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P.V. Panel wind load effects

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  1. P.V. Panel wind load effects Design Review #2 December 2010 Arman Hemmati , Brady Zaiser, Chaneel Park, Jeff Symons, Katie Olver

  2. Overview • Refresh • Wind-Tunnel • Preliminary Model • CAD Models • Measurement Methods • CFD Progress • What’s Next

  3. Refresh – Where were we? • Ideal angle of inclination is 51° • Too much weight for the roof? • Wind-Tunnel testing – Experimental • Computational Fluid Dynamics (CFD) - Computational

  4. Wind Tunnel – Spec. & Set-backs • Wind tunnel dimensions: Target area = 20% (total area) • Set-Backs: • Unsure about the state of the Wind Tunnel – Speculations say it is functional now! • Wind Speed – Hard to obtain (Repeatability Issue) • Availability of the Tunnel – Time conflict with other groups 20% 76.2 cm 137.2 cm

  5. Preliminary Model – Design • 4-Leg Spider Model • Non-Repeatable & High errors • Complex MDoF Model Adapted for Final Concept

  6. Preliminary Model – Design • Screw-Bolt MDoF Model • Basic Hinge Model Simple/Cheap/ Repeatable | Poor

  7. CAD Models – SolidWorks • Screw-Bolt Multi-DoF Model created in SolidWorks

  8. Measurement Methods • Drag-Plate / Load Cells: • One directional force measurement • Only measures at a specific location • Pressure Taps: • Informed it is hard to set-up • Easy data acquisition / problematic analysis • Good Accuracy • ATI 6-Axis Force Transducer: • Budget Constrains: Delivery time / COST • Highly Accurate | Problematic Calibration

  9. CFD Progress – 2D Modeling • COMSOL Model: • Geometry – full size panel & 2D • Simple Physics – Laminar flow to begin • Complex system – Turbulent / Time-dependent • Boundary Layer Issues – Top/Bottom/Outlet • Convergence Issues

  10. What’s Next – Where are we going? • Building the Experimental Model • Planning the Wind-Tunnel Schedule • Familiarizing with the Acquisition programs (Labview) • Proceeding with the CFD Models

  11. www.ucalgary.ca/deloprec

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