Thermal Infrared Images
Infrared thermal Captures and data recording are still in progress as of 7/12/24. It is still unclear how much of a cooling difference the solar reflective coating makes. More of the image comparisons will become uploaded when data collecting period has ended.
Table of Contents
Image Slide Comparison
Cool-Coat Comparison
How did you Compare the Cool-Coat?
I used the Flir Ignite Thermal Comparison tool and made a polygon selection around the before and after cool-coat images displaying the sustainable city. I then used the delta tool to compare the two average temperatures of the polygon selections. The video on the right shows the tool measuring the temperature average of the pre-cool-coat capture on the right and the post-cool-coat capture on the left.
Slide to see Before and After Comparison
The mural’s 1st coat surface layer used regular mural paint. After painting the final colors, I went over the “sustainable city” section of the mural with a clear cool-coat sealant. I documented the before and after comparison with my thermal infrared camera to see how much of a temperature-cooling difference the coat made. Two coats are on the sustainable/blue figure, and one coat is on the surrounding environment of the sustainable city. No coats are on the urban heat island/red figure and their environment.
Before Cool-Coat Sealant (Sustainable Figure)
- Capture Date: 8/5/23
- Capture Time: 2:06pm
- Outside Temperature: 88° F
- Capture High Temperature: 99.1° F
- Capture Low Temperature: 94.3° F
- Average: 96° F
After the Cool-Coat Sealant (Sustainable Figure)
- Capture Date: 8/20/23
- Capture Time: 2:15pm
- Outside Temperature: 91° F
- Capture High Temperature: 92° F
- Capture Low Temperature: 86.4° F
- Average: 88.3° F (-7.7° F)
Floral subject (petals of the flower) on the “sustainable city” environment uses three coats of the cool coat sealant with the surrounding environment having one coat of of the cool coat sealant.
Before Cool-Coat Sealant (Flower)
- Capture Date: 7/28/23
- Capture Time: 1:29pm
- Outside Temperature: 94° F
- Capture High Temperature: 106° F
- Capture Low Temperature: 101° F
- Average: 103° F
After the Cool-Coat Sealant (Flower)
- Capture Date: 9/6/23
- Capture Time: 1:31pm
- Outside Temperature: 95° F
- Capture High Temperature: 101° F
- Capture Low Temperature: 96.6° F
- Average: 98.6° F (-4.4)
Fern subject on the “sustainable city” environment used only 1 coat of the cool coat sealant along with its surrounding environment.
Before Cool-Coat Sealant (Fern)
- Capture Date: 7/28/23
- Capture Time: 1:48pm
- Outside Temperature: 94° F
- Capture High Temperature: 109° F
Capture Low Temperature: 98.4° F
After the Cool-Coat Sealant (Fern)
- Capture Date: 9/6/23
- Capture Time: 1:36pm
- Outside Temperature: 95° F
- Capture High Temperature: 107° F
- Capture Low Temperature: 96.3° F
Two coats are on the sustainable/blue figure, and one coat is on the surrounding environment of the sustainable city. No coats are on the urban heat island/red figure and their environment.
Before Cool-Coat Sealant (Hips)
- Capture Date: 7/28/23
- Capture Time: 1:48pm
- Outside Temperature: 94° F
- Capture High Temperature: 109° F
Capture Low Temperature: 97.5° F
After the Cool-Coat Sealant (Hips)
- Capture Date: 9/6/23
- Capture Time: 1:36pm
- Outside Temperature: 95° F
- Capture High Temperature: 107° F
- Capture Low Temperature: 96.3° F
Three coats are on the sustainable/blue figure shins and floral ground, and one coat is on the surrounding environment of the sustainable city. No coats are on the urban heat island/red figure.
Before Cool-Coat Sealant (Shins)
- Capture Date: 7/28/23
- Capture Time: 1:29pm
- Outside Temperature: 94° F
- Capture High Temperature: 110° F
Capture Low Temperature: 99.3° F
After the Cool-Coat Sealant (Shins)
- Capture Date: 9/6/23
- Capture Time: 1:31pm
- Outside Temperature: 95° F
- Capture High Temperature: 106° F
- Capture Low Temperature: 94.6° F
Two coats are on the sustainable/blue figure, and one coat is on the surrounding environment of the sustainable city. No coats are on the urban heat island/red figure and their environment.
Before Cool-Coat Sealant (Distorted Limb)
- Capture Date: 7/28/23
- Capture Time: 1:49pm
- Outside Temperature: 94° F
- Capture High Temperature: 108° F
Capture Low Temperature: 97.3° F
After the Cool-Coat Sealant (Distorted Limb)
- Capture Date: 9/6/23
- Capture Time: 1:38pm
- Outside Temperature: 95° F
- Capture High Temperature: 105° F
- Capture Low Temperature: 93.9° F
Thermal Difference (Figures)
Thermal Pan Mural
Thermal Difference (Figures)
This video highlights my process of measuring the surface temperature difference of the poly-area averages of the Sustainable and Heat Island Figures. In this capture I took on a 95-degree day at 1:39pm on September 6th, I found a 1.1-degree Fahrenheit temperature difference in the Sustainable City Figure compared to the Heat Island figure.
Heat Retention (Winter)
This timelapse records the Winter Heat Retention of the mural. A summer timelapse will be taken in the upcoming 2024 season.
A winter timelapse I took of the mural heat fading from afternoon (12:50pm) to sunset (5:00pm). The timelapse was taken on January 13th, 2024. The absorbed heat on the mural rapidly decreased during the last 10 minutes leading up to sunset, from 4:50pm to 5:00pm. I plan to film another one over next summer to contrast the winter’s quick retention of absorbed heat on the mural’s surface compared to the Heat Island figure.
Sources
Braswell, Mary. “Street Art Meets Climate Science in the Big, Blue Face of Zeus.” UCLA Luskin Center for Innovation, The UCLA Luskin Center for Innovation, 22 Oct. 2019, innovation.luskin.ucla.edu/2019/10/22/street-art-meets-climate-science-in-the-big-blue-face-of-zeus/.
Plumer, Brad, et al. “How Decades of Racist Housing Policy Left Neighborhoods Sweltering.” The New York Times, The New York Times, 24 Aug. 2020, www.nytimes.com/interactive/2020/08/24/climate/racism-redlining-cities-global-warming.html.
“Science Meets Art in Exhibition on How Street Murals Can Beat the Heat; Recommendations Result of Faculty/Student Research.” Newsroom, University of Richmond, 9 May 2019, news.richmond.edu/releases/article/-/16311/science-meets-art-in-exhibition-on-how-street-murals-can-beat-the-heat-recommendations-result-of-faculty/student-research-.html.