Post on 04-Jun-2018
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Frank Vignola*
Peter Harlan, Rich Kessler*
Ihab Elzeyadi*
Bob Simonton†
Fotis Mavromatakis‡
*University of Oregon† Oregon University System
‡ Technical Educational Institute of Crete
6/12/2010 1fev@uoregon.edu
Background and rationale for solar awning Design of Prototype Monitoring the system Evaluating the effects of shading Predictions for daylighting A look at awning cooling Kiosk Lessons learned
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Reduce our carbon footprint Maintain our national leadership position in
sustainability Allow student and faculty researchers to develop
and test new technologies Increase the competitiveness of the university
system’s renewable energy curriculum Increase the value of the research, prior to
commercialization Enhance the Oregon economy by creating both
short and long term job opportunities in emerging renewable energy industries.
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Exterior view of solar awning
Interior view of solar awning at twilightSee contrast with florescent fixtures in adjacent hall
Incident irradiance DC current and voltage AC Power output PV module temperature Global illuminance Illuminance on top of light shelf Illuminance at bottom of window sill Illuminance on wall opposite sill Power to LEDs
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Eugene, OR -- Solar Awning Data -- February 21, 2010
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50
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AC Output East Array AC Power West Array
AC
Pow
er O
utpu
t (W
/m2 )
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"Max Current Point" vs "Max Voltage Point"February 21, 2010
0500
1,0001,5002,0002,5003,0003,5004,0004,5005,000
70,0
00
75,0
00
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00
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000
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000
Voltage (milivolts)
DC
Cur
rent
(M
iliam
ps)
Unshaded Array One Module Shaded Two or More Modules Shaded
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PV Awning Efficiency Normalized to Array Rating February 2, 2009
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7:00 8:00 9:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00Time
Arr
ay E
ffici
ency
East Efficiency West Efficiency East Temperature Adjusted
PV Awning Efficiency Normalized to Array RatingFebruary 21, 2010
0%
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7:00 8:00 9:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00Time
Arr
ay E
ffic
ienc
y (%
)East Efficiency West Efficiency East Temperature Adjusted
Need to adjust for temperature
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Light Levels not Awning Light Level with Awning Light Levels with AwningNo Interior Light Shelf With Interior Light Shelf
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Solar Awning Illuminance DataFebruary 21, 2010
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Time
Illum
inan
ce (
Lux)
Illuminance, Global IlluminanceTop of Light ShelfIlluminance Bottom of Window Pane Illuminance at Back Wall
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Building Integrated PV with kiosk makes for great educational opportunities
Sizing inverter to system important Use bigger PV panels when possible Include maintenance and repair into design
considerations Don’t overestimate the use of common sense
Pay attention to details!
6/12/2010 14fev@uoregon.edu