HomeMy WebLinkAboutWATERGLEN SOLAR ARRAY - FDP200013 - SUBMITTAL DOCUMENTS - ROUND 1 - SUPPORTING DOCUMENTATION (4)SANDBOX
430 N. College Ave.
STE #435
Fort Collins, CO 80524
(913) 660 -8581
AJLyle@sangLboxsolar.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 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 vanes and peaks at 1,000.0 WW2
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 suhtended angle
Timezone UTC-7
Site Configuration ID 30750,5596
Summary of Results Glare with potential for temporary after -image predicted
PV name Tin Orientation "Green" Glare "Yellow" Glare
deg deg min
900 1200 0
min
W
Energy Produced
kWh
Component Data
PV Array(s)
Name PV array 1
AXIS treEeing Fixed (no lclaim)
Tin 300deg
orientation 1800 deg
Rated power
Panel material Smooth glass without AIR ccelutg
Vary retlecnvity with sun position? yes
Correlate slope error with surface type? yes
Slope error n n:, nnml
Ground
Height above
Total
Vertex
Latitude
Longnude
elevation
ground
elevation
deg
deg
tt
It
C
'
40 602914
-105 009879
497540
000
497540
2
40 602925
.105 009327
4972 12
000
4972 12
3
40 603134
.105 009351
4974 20
000
497420
4
40 603318
-105 009450
4972 15
000
4972 15
5
40603428
-105009563
497327
OW
4973.27
6
40 603415
105 009783
497802
0.00
497802
7
40 603189
-105 009887
4977.50
000
497750
Route Receptor(s)
Ram* Roule 1
Route type, Two-way
View angle 50 0 deg
Ground
Height atov*
Total
Vertex
Latitude Longitude
elevation
ground
elevation
on dog
1t
it
It
i
40604224-105010871
4994.91
0.00
4984.91
2
40602781 -105.011182
497940
0.00
497940
J
40 601842 .105 012411
498646
0,00
498646
PVarray 1 potential temporary afterimage
Component Green punt (min( yellow glare (min)
OP OP i G C
OP OP 2 0 0
OP OP 3 0 0
OP OP4 0 14
Roule Route 1 0 0
PV array 1 - OP Receptor (OP 1)
No ry'are fowx/
PV array 1 - OP Receptor (OP 2)
No glare Nunn
PV array 1 - OP Receptor (OP 3)
No glare Nuno
PV array 1 - OP Receptor (OP 4)
PV array is eapecleu to pfoouce me following glare for receptors at this location
• 0 minutes of'gneen' glare with low potential to cause temporary after trnl3ge
• 14 minutes of yellow -glare with potential to cause temporary after -image
L ®CSVVI
ei Annual Predicted Glare Occurrence
nW-
»W-
uom-
AW -
19W-
tow -
1rW-
16W-
Ism -
14 M -
1100
pJp Dap-
Slift -
low -
aW-
®W-
o9W-
aW-
al
oaW-
mW-
WI-
in"-
WWn 1_q
VP fao tsar PQt they It"r 14A 4g DIN 10 ly
Day of year
tow pateMul for temporary after rope
PMMINI tar temppary a1tNmage
Glare Reflections on PV Footprint (Aggregate)
190--��
160
140
Silo
t_
Z 80
60
30
0
0 -10 a0 b0 $0 Ado 1.10 NA", ti60
East(ft)
ron Low potential for temporary afterimage
Potential fa temporary afterimage
SEEM Pil Array rootpnnt
60 Daily Duration of Glare
50
4 40
A
ill
NO 30
W
5
C
F 20
10
V° feio 00 0o'k V, Vl PO4 09 Oli, elp� OR`
Day of year
M Low potential for temporary offer Imps
Potential fa temporary after papa
Hazard plot for pv-array-I and OP 4
ry 10l
r
E
3 to,
d
V
C
R
t 10-1
N
C
oc
Le lot 101 101
Subtended Source Angle (mrad)
a Hazard from SmIrce Data
O Hazard Due to viewing un6ltHed Sun
Potential for Afterimage Zone
Low Potential for Afterimage Zone
permanent Retinal Damage zone