HomeMy WebLinkAboutWATERGLEN SOLAR ARRAY - FDP200013 - SUBMITTAL DOCUMENTS - ROUND 2 - SUPPLEMENTAL INFORMATION (2)SANDBOX
SOLAR
430 N. College Ave.
STE #435
Fort Collins, CO 80524
(913) 660 -8581
AJ yle0sandboxsolar.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.
Glare Analysis 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 74"
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
Timezone UTC-7
Site Configuration ID 30750 5596
Summary of Results Glare with potential for temporary after -image predicted
PV name Till Onemanon "Green" Glare "YellOW' Glare
deg deg min
� V n"A / 1 V 0 .. v
min
Energy Produced
MWh
Component Data
PV Array(s)
Name wandv 1
Axis IIWking Fixed Ira mtahro)
Tin 300deg
onentaloon 180 0 deg
Rated power -
Panel mateml Srnuolh glass without AR coating
Vary onWillvlty w101 sun position? Yes
Correlate slope error wlm sump type? Yes
Slope error n bb n'irnC
Ground
Height above
Total
Vertex
Latitude
Longitude
elevation
ground
elevitlon
deg
deg
IT
R
it
1
40 602914
-105.009819
497540
000
497540
2
40 602925
-105 009327
497212
000
4972 12
3
40 603134
-105.009351
497420
000
4974.20
4
40603318
105009450
4972.16
000
497215
5
40 603428
.105 009563
497327
000
497327
6
40 603415
105 009783
497002
000
4978.02
7
40603189
-105009887
497750
000
4917.50
Route Receptor(s)
Met Roane 1
ROM tvp* Tw"m
VMw angle 60 0 deg
around
Holgbt atlova
tbtal
Vortex
LatMdo LongMMa
sWatlon
ground
alaratton
deg dog
n
R
R
1
40.604224-105.010871
4984.91
0.00
49U 91
2
40.602787-105.011182
497940
0.00
497940
3
40,601842-105012411
4906.46
0.00
49%46
PV array 1 potential temporaryafter-image
Component
UP OP 1
OP OP 2
OP Of, 3
OP OP a
Route Raffle i
PV array 1 - OP Receptor (OP 1)
No gfa,e roorw
PV array 1 - OP Receptor (OP 2)
No gore fou x;
PV array 1 - OP Receptor (OP 3)
No glare rowel
Green glare (men( Yellow glare (min(
0 0
0 0
0 0
0 14
0 0
PV array 1 - OP Receptor (OP 4)
PV array IS elgl0cteo to ploauce the fo MM glare for receptors at Ih5 location
• 0 mmules oi'gnrh' glafe with row Potential to cause Iempnrary anerQn�w
14 metules of'yetbw^ glme wnn potential to cause terrpofary anef uviage
Cs ,:
Annual Predicted Glare Occurrence
14of, -
I'M-
r2 00 -
al W -
zoW-
19W-
16W.
lrW-
16W-
Mali.
eW-
r If W-
aZ1aW-
11 W -
IOW-
WW-
ni
" 00 -
66W-
MW-
0,W.
W00W-
oloo-
W oo f
VP
to W to 00' NP to • 9 ti•` 0 cs`
Day of year
aiiiiit 1 ow Pao." to terivot" after-Mage
PoterilW he lerrparany atler-orpa
Glare Reflections on PV Footprint (Aggregate)
190
160
140
110
V
Z0 60
60
30
OI
O �•O IP 0 60 '0 10 1►O `60
East Ift)
fain Low potential for temporary afterimage
Potential for temporary afterimage
PV Allay rootprmt
60 1
s0
10
Daily Duration of Glare
0 1-.. -•---• —• - • -• - — �—
Irtl w° J*` W �►� � P� olA � tf` �Ip' opt'
Day of year
low poumul far temporary aM1w image
Potentrai tar bmponry other .-age
Hazard plot for pv array I. and OP 4
r lol
E
V
3 to, ,
0
U
C
m_
9
A 10"1
m
c
to-! •
---
-, .. =,. .
to,
10, tot to,
Subtended Source Angle (mrad)
e Hazard from Source Data
O Hazard Due to Viewing Unfiltered Sun
Potential for Afterimage Zone
... , Low Potential for After image Zone
.- Permanent Retinal Damage Zone