1. P.V. PANEL WIND LOAD EFFECTS D ECEMBER 2010 Arman Hemmati, Brady Zaiser, Chaneel Park, Jeff Symons, Katie Olver Design Review #2

2. DECEMBER- 2010Design Review #2: DeLoPREC Overview Refresh Wind-Tunnel Preliminary Model CAD Models Measurement Methods CFD Progress What’s Next 1

3. DECEMBER- 2010Design Review #2: DeLoPREC Refresh – Where were we? 2 Ideal angle of inclination is 51° Too much weight for the roof? Wind-Tunnel testing – Experimental Computational Fluid Dynamics (CFD) - Computational

4. DECEMBER- 2010Design Review #2: DeLoPREC Wind Tunnel – Spec. & Set-backs 3 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% 137.2 cm 76.2 cm

5. DECEMBER- 2010Design Review #2: DeLoPREC Preliminary Model – Design 4 1.Complex MDoF Model Adapted for Final Concept 2.4-Leg Spider Model Non-Repeatable & High errors

6. DECEMBER- 2010Design Review #2: DeLoPREC Preliminary Model – Design 5 3.Basic Hinge Model Simple/Cheap/ Repeatable | Poor 4.Screw-Bolt MDoF Model

7. DECEMBER- 2010Design Review #2: DeLoPREC CAD Models – SolidWorks 6 Screw-Bolt Multi-DoF Model created in SolidWorks

8. DECEMBER- 2010Design Review #2: DeLoPREC Measurement Methods 7 1.Drag-Plate / Load Cells: One directional force measurement Only measures at a specific location 1.Pressure Taps: Informed it is hard to set-up Easy data acquisition / problematic analysis Good Accuracy 2.ATI 6-Axis Force Transducer: Budget Constrains: Delivery time / COST Highly Accurate | Problematic Calibration

9. DECEMBER- 2010Design Review #2: DeLoPREC CFD Progress – 2D Modeling 8 COMSOL Model: o Geometry – full size panel & 2D o Simple Physics – Laminar flow to begin o Complex system – Turbulent / Time-dependent Boundary Layer Issues – Top/Bottom/Outlet Convergence Issues

10. DECEMBER- 2010Design Review #2: DeLoPREC What’s Next – Where are we going? 9 Building the Experimental Model Planning the Wind-Tunnel Schedule Familiarizing with the Acquisition programs (Labview) Proceeding with the CFD Models

11. DECEMBER- 2010Design Review #2: DeLoPREC www.ucalgary.ca/deloprec