HomeMy WebLinkAboutWATERGLEN SOLAR ARRAY - PDP190010 - SUBMITTAL DOCUMENTS - ROUND 3 - SUPPLEMENTAL INFORMATION (3)SANDBOX
SOLAR
430 N. College Ave.
STE #435
Fort Collins, CO 80524
(913) 660 -8581
JLyle(@sandboxsolar.com
Waterglen Solar Glare Analysis
1 Executive Summary 2
1.1 Introduction 2
1.2 Scope of Services 2
2 Analysis Software 2
2.1 Platform and Features 2
2.2 Model Assumptions and Inputs 3
3 Findings/Results 4
1 Executive Summary
1.1 Introduction
Sandbox Solar has conducted a solar glare analysis for the photovoltaic (PV) system that is
proposed to be located at 3730 Celtic Ln, Fort Collins, CO, 80524. The analysis was performed
with software that was designed to evaluate potential glare hazards for solar PV systems
designated for installation near airports and to accommodate Federal Aviation Administration
(FAA) regulations, but can also be used to evaluate glare for solar projects located in other
areas.
1.2 Scope of Services
For this work effort, Sandbox Solar performed the following activities:
• Reviewed existing design documentation for the proposed solar PV array at 3730 Celtic
Ln, Fort Collins, CO, 80524 to define the specific parameters and information required for
the glare analysis.
• Obtained additional, necessary inputs from other parties to complete the glare analysis
(e.g. module manufacturer specification information).
• Performed analysis with a 3rd party software that is based on former Sandia Lab SGHT
technology.
• Provided limited commentary on design assumptions and analysis results.
2 Analysis Software
2.1 Platform and Features
Sandbox Solar performed this analysis using ForgeSolar software. This software is based
on the R&D 100 Award -winning Solar Glare Hazard Analysis Tool (SGHAT) software, which
was developed jointly with Sandia National Laboratories. ForgeSolar software was specifically
designed to accommodate FAA requirements, but can also be used for sites located away from
airports.
2.2 Model Assumptions and Inputs
The solar glare analysis significant assumptions and input information used in the ForgeSolar
software are summarized below. We used worst -case scenario input of a panel without anti -
reflective coating. However, the panels being used in this project will have an Anti -Reflective
coating per Adani's module specifications.
is Model Inputs
Parameter
Value
PV Fixed Tilt System
Array Orientation
1800
Array Tilt Angle
300
Panel Surface
Smooth Tempered Glass without Anti -
Reflective Coating
Reflectivity
Varies with incident angle, weather, sun
position, and time of year.
Slope Error
Correlate with module surface type.
PV system height 7'4"
Height of Observation Point 5.5'
3 Findings/Results
The results of the solar glare analysis for the proposed PV system to be located on the ground
at 3730 Celtic Ln, Fort Collins are included on the pages below. The primary result is that no
glare is predicted at 3 of the 4 observation points defined on page 4 of the report by numbered
markers. Yellow Glare is predicted at observation point 4, but it is only for 14 minutes of the year
and it modeled the corner of the array area that does not have solar panels. This can be
modeled in the glare reflections footprint area table. For reference, 'Green glare' is defined by
ForgeSolar as glare with low potential for temporary after -image and 'Yellow glare' is defined as
glare with the potential for temporary after -image.
Created Aug. 29, 2019 7:21 p.m.
Updated Aug. 29. 2019 7:21 p.m.
DNI varies and peaks at 1,000.0 W/m^2
Analyze every 4 minute(s)
0.5 ocular transmission coefficient
0.002 m pupil diameter
0.017 m eye focal length
9.3 mrad sun subtended angle
Tlmezone UTC-7
Site Configuration ID. 30750 5596
Summary of Results Glare with potential for temporary after -image predicted
PV name Tilt OnenUtion "Green" Glare "Yellow" Glare
deg deg min
cNmry1 _�0 1800 n
min
IE
Energy Produced
kWh
Component Data
PV Array(s)
Name $-V allay 1
Axis U=kMo Flxed(nomtathn)
Tth 300"1
Onetnabon 1800 deg
Rated power
Panel matenal ;SrtpOth gnt55 Without AN craving
Vary rellecovrty with sun poslbon? vow
Cortelau slope error with sunace type? Yi,s
Slope error mtt
Ground
Height abow
Total
Vertex
latitude
Longhude
elevabon
ground
elevation
deg
deg
R
R
R
1
40 W2914
-105 009879
497540
000
497540
2
40.602925
-105 009327
4972.12
0 00
4972 12
3
40.603134
-105.D09351
497420
0.00
4974.20
4
40 603318
-105 009450
497215
0 00
4972 15
5
40603428
-105009563
4973.27
0.00
497327
6
40 603415
-105 009783
4978.02
000
497802
7
40 603189
-105 009887
497750
000
4977.50
Route Receptor(s)
Name Roule t
Route type 7VN'M3y
vrm angle 50 0 deg
Ground
Height above
Total
Vertex
Latitude
Longitude
elevation
ground
elevation
deg
deg
h
n
n
1
40604224
-105.010871
498491
0.00
498491
2
40.602701
-105.011182
497940
000
497940
0
40601842
.105012411
198616
000
498616
PV array 1 potemwtemporaryafter-image
component Creed Ohre (min) Yellow plan tram)
OP OP 1 0 0
OP OP 2 0 0
OP OP 9 0 0
OP_ OP 4 0 14
Rate: Route 1 0 0
PV array 1 - OP Receptor (OP 1)
W glare found
PV array 1 - OP Receptor (OP 2)
Ab ,pare found
PV array 1 - OP Receptor (OP 3)
w yare found
PV array 1 - OP Receptor (OP 4)
Pv array IS effected to Produce me bw"q gime tor receptors at mrs location
• 0 minutes of green' glare with low potential to cause temporary a0eranage
• 14 rrwanes of ycigw^ glare wnh potential to cause Inrpnraryaner-inage
Annual Predicted Glare Occurrence
+oo -
mop-
]) on -
]1 00 -
x00-
te 00 -
Ie 00 -
1'! w -
16w
Z00-
1400-
r 1000-
f2 I1 00 -
low-
wo0-
moo-
mo0-
moo-
moo-
moo -
NW-
mm-
-
W Cow
Cow-
to 00
to yv ' r '0 "A 09 tfl. .a' Oar -
Day of year
M We, potential for temporary after muge
Potential for temporary afterenage
Glare Reflections on PV Footprint (Aggregate)
190
160
140
110
L
Z b
I
6
30
0
0 10 3P bo to ,00 ,10 ,a0 ,bo
East (ft)
11011 tow potential for temporary afterimage
Potential for temporary afterimage
11111 W Array Footprint
00
50
10
Daily Duration of Glare
`i fall, 40 0 '0' Iff, 11 PO4 'beg Do 0 DID'
Day of year
M tw potential for temporary afterimage
"emiai for temporary of orim.ge
E to^
W
R
A 30-1
no
C
10-1
100
Hazard plot for pv-array-I and OF 4
lot 101
Subtended Source Angle (mrad)
a Hazard from source Data
o Hazard Due to Vlewrng unfiltered sun
Potential for Aker -Image Zone
ors tow Potential for After -Image Zone
Permanent Retinal Damage Zone
to,