p.v. panel wind load effects m arch 2011 arman hemmati, brady zaiser, chaneel park, jeff symons,...
TRANSCRIPT
![Page 1: P.V. PANEL WIND LOAD EFFECTS M ARCH 2011 Arman Hemmati, Brady Zaiser, Chaneel Park, Jeff Symons, Katie Olver In-Class Presentation TEAM 12](https://reader035.vdocuments.site/reader035/viewer/2022070307/551a46ea550346cb358b5879/html5/thumbnails/1.jpg)
P.V. PANEL WIND LOAD EFFECTS
MARCH 2011
Arman Hemmati , Brady Zaiser, Chaneel Park, Jeff Symons, Katie Olver
In-Class Presentation
TEAM 12
![Page 2: P.V. PANEL WIND LOAD EFFECTS M ARCH 2011 Arman Hemmati, Brady Zaiser, Chaneel Park, Jeff Symons, Katie Olver In-Class Presentation TEAM 12](https://reader035.vdocuments.site/reader035/viewer/2022070307/551a46ea550346cb358b5879/html5/thumbnails/2.jpg)
MARCH- 2011In-Class Presentation: DeLoPREC
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Introduction – Problem
• Most efficient sun capture at 51°
• Higher angle means greater aerodynamic forces
• Ballast required to hold the panel down
• Too much weight for the roof?
• Want to better understand wind loads on PV panels:
▫ Wind Tunnel Testing▫ Computational (CFD) Analysis
![Page 3: P.V. PANEL WIND LOAD EFFECTS M ARCH 2011 Arman Hemmati, Brady Zaiser, Chaneel Park, Jeff Symons, Katie Olver In-Class Presentation TEAM 12](https://reader035.vdocuments.site/reader035/viewer/2022070307/551a46ea550346cb358b5879/html5/thumbnails/3.jpg)
MARCH- 2011In-Class Presentation: DeLoPREC
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Objectives – Functional Requirements
1. Effect of Wind Direction▫ Front or back
2. Effect of Panel Tilt ▫ Preferred angle is 51°
3. Proximity of Panel to the Ground▫ Should reduce drag to a point
![Page 4: P.V. PANEL WIND LOAD EFFECTS M ARCH 2011 Arman Hemmati, Brady Zaiser, Chaneel Park, Jeff Symons, Katie Olver In-Class Presentation TEAM 12](https://reader035.vdocuments.site/reader035/viewer/2022070307/551a46ea550346cb358b5879/html5/thumbnails/4.jpg)
MARCH- 2011In-Class Presentation: DeLoPREC
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Wind Tunnel – Test Apparatus
![Page 5: P.V. PANEL WIND LOAD EFFECTS M ARCH 2011 Arman Hemmati, Brady Zaiser, Chaneel Park, Jeff Symons, Katie Olver In-Class Presentation TEAM 12](https://reader035.vdocuments.site/reader035/viewer/2022070307/551a46ea550346cb358b5879/html5/thumbnails/5.jpg)
MARCH- 2011In-Class Presentation: DeLoPREC
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Wind Tunnel – Testing Parameters
•Wind direction▫How does the force on the panel change
depending on the wind direction? Front, back
▫2 levels
![Page 6: P.V. PANEL WIND LOAD EFFECTS M ARCH 2011 Arman Hemmati, Brady Zaiser, Chaneel Park, Jeff Symons, Katie Olver In-Class Presentation TEAM 12](https://reader035.vdocuments.site/reader035/viewer/2022070307/551a46ea550346cb358b5879/html5/thumbnails/6.jpg)
MARCH- 2011In-Class Presentation: DeLoPREC
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Wind Tunnel – Testing Parameters•Panel angle
▫How does the force on the panel change as the angle increases?
▫In Calgary the ideal angle is 51°▫Testing at:
35°, 50°, 65° and 80°▫4 levels
![Page 7: P.V. PANEL WIND LOAD EFFECTS M ARCH 2011 Arman Hemmati, Brady Zaiser, Chaneel Park, Jeff Symons, Katie Olver In-Class Presentation TEAM 12](https://reader035.vdocuments.site/reader035/viewer/2022070307/551a46ea550346cb358b5879/html5/thumbnails/7.jpg)
MARCH- 2011In-Class Presentation: DeLoPREC
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Wind Tunnel – Testing Parameters
•Panel height▫How does the force on the panel change as
the distance between the ground and the bottom of the panel increases?
▫Unable to use CFD for this▫ Testing at:
0, 1”, 2”, …, 6”▫7 levels
![Page 8: P.V. PANEL WIND LOAD EFFECTS M ARCH 2011 Arman Hemmati, Brady Zaiser, Chaneel Park, Jeff Symons, Katie Olver In-Class Presentation TEAM 12](https://reader035.vdocuments.site/reader035/viewer/2022070307/551a46ea550346cb358b5879/html5/thumbnails/8.jpg)
MARCH- 2011In-Class Presentation: DeLoPREC
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Wind Tunnel – Testing Procedure
•How many runs?▫2∙4∙7 = 56 runs per replication▫2 replications = 112 runs
•Randomize run order▫Lots of set-up between runs
•How long will it take?▫5 min/run + daily set-up ▫Estimate 15 hours 1 week
![Page 9: P.V. PANEL WIND LOAD EFFECTS M ARCH 2011 Arman Hemmati, Brady Zaiser, Chaneel Park, Jeff Symons, Katie Olver In-Class Presentation TEAM 12](https://reader035.vdocuments.site/reader035/viewer/2022070307/551a46ea550346cb358b5879/html5/thumbnails/9.jpg)
MARCH- 2011In-Class Presentation: DeLoPREC
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Computational Fluid Dynamics
• 2D Simulations• Using Comsol Multiphysics and Ansys CFX
![Page 10: P.V. PANEL WIND LOAD EFFECTS M ARCH 2011 Arman Hemmati, Brady Zaiser, Chaneel Park, Jeff Symons, Katie Olver In-Class Presentation TEAM 12](https://reader035.vdocuments.site/reader035/viewer/2022070307/551a46ea550346cb358b5879/html5/thumbnails/10.jpg)
MARCH- 2011In-Class Presentation: DeLoPREC
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CFD - Verification
• Results recorded in ratios (CL, CD, CP)
• Vertical Flat Plate
• Reference: “On the Flow of Air Behind an Inclined Flat Plate of Infinite Span” -Fage and Johansen, 1927.
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MARCH- 2011In-Class Presentation: DeLoPREC
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13 13.5 14 14.5 15 15.5
-1.6
-1.1
-0.6
-0.1
0.4
0.9
FrontBack
Distance Along Y-Axis (m)
Pre
ssure
(P
a)
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MARCH- 2011In-Class Presentation: DeLoPREC
www.ucalgary.ca/deloprec