Los Angeles painting city streets white in bid to combat climate change

kudzu said:
What an interesting experiment... I hope it works.
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I expect you said exactly the same when they put solar panels on road surfaces in Idaho!



Roughly 25 out of 30 panels installed in a prototype solar road in Idaho broke within a week, after the project received $3.9 million in funding and 6.5 years of development.

Despite massive internet hype, the prototype of the solar “road”can’t be driven on, hasn’t generated any electricity and 75 percent of the panels were broken before they were even installed. Of the panels installed to make a “solar footpath,” 18 of the 30 were dead on arrival due to a manufacturing failure. A short rain shower caused another four panels to fail, and only five panels appear to be presently functional. The prototype appears to be plagued by drainage issues, poor manufacturing controls and fundamental design flaws.

Every single promise made about the prototype seems to have fallen flat and the project appears to be a “total and epic failure,”according to an electrical engineer.

If it had worked, the panels would have powered a single water fountain and the lights in a restroom, after more than $500,000 in installation costs provided by a grant from the state government. The U.S. Department of Transportation initially handed $750,000 in grants to fund the research into the scheme, then invested another pair of grants worth $850,000 into it. The plan, dubbed, “Solar FREAKIN’ Roadways” raised another $2.2 million dollars in crowd-funding, even though several scientists publicly debunked the idea.

Scientists repeatedly criticized the scheme as panels on roads wouldn’t be tilted to follow the sun, which makes them incredibly inefficient, would often be covered by cars during periods when the sun is out and wouldn’t be capable of serving as a road for long.

Solar FREAKIN’ Roadways has received fawning coverage in The Huffington Post, Nature World News, Newsweek, Wired, Ecowatchband National Geographic. The program was supported by political leaders like Idaho Republican Sen. Mike Crapo.

Covering the road with solar panels would also be exceedingly destructive to the power grid, which is set up to handle conventional energy. In order for any power grid to function, demand for energy must exactly match supply. Power demand is relatively predictable and nuclear plants can adjust output accordingly. Solar power of any type cannot easily adjust output and is thus unpredictable relative to conventional systems.

http://www.cfact.org/2016/10/19/sol...pic-failure-83-of-its-panels-break-in-a-week/
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Havana Moon said:
I expect you said exactly the same when they put solar panels on road surfaces in Idaho!





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Are you making a comparison between the two experiments? Really? Solar panels are better on covered parking or buildings.
 
Althea said:
It's already been proven to work. If memory serves, most roads in Fla are white.
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FAQs - White Roof Project

www.whiteroofproject.org/faq

A white roofs are a lot more than just white paint! White roofs' benefits are measured partly according to the solar reflectance index, or SRI. A roof's SRI is a measure of a surface's ability to reflect solar heat. SRI measures reflectance (reflecting the sun's rays) and thermal emittance (the roof's ability to radiate absorbed heat).
 
Althea said:
It's already been proven to work. If memory serves, most roads in Fla are white.
Click to expand...

FAQs - White Roof Project

www.whiteroofproject.org/faq

A white roofs are a lot more than just white paint! White roofs' benefits are measured partly according to the solar reflectance index, or SRI. A roof's SRI is a measure of a surface's ability to reflect solar heat. SRI measures reflectance (reflecting the sun's rays) and thermal emittance (the roof's ability to radiate absorbed heat).
 
Urban Heat: Can White Roofs Help Cool World's Warming Cities ...

https://e360.yale.edu/features/urban-heat-can-white-roofs-help-cool-the-worlds-warming-cities

Mar 7, 2018 - So, argues a recent study published in the journal Nature Geoscience, if dark heat-absorbing surfaces are warming our cities, why not negate the effect by installing white roofs and other light-colored surfaces to reflect back the sun's rays? Lighter land surfaces “could help to lower extreme temperatures by
 
How much can a white roof help reflect heat? | The Straight Dope ...

https://www.connectsavannah.com/sav...te-roof-help-reflect-heat/Content?oid=2132782

Apr 8, 2010 - According to Lawrence Berkeley Laboratories, white-coated roofs can reflect 60 to 85 percent of the solar energy that hits them and stay as little as nine degrees above air temperature. Dark-colored roofs, by contrast, typically reflect 20 percent of sunlight or less, and a black asphalt roof reflects only 5 ...
 
Havana Moon said:
I am saying that, when it comes to renewable energy, you're pretty gullible. Witness how you fell for that April Fool's joke.
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Saudi Arabia will be exporting solar within the next decade.

Do you know why Bermuda has white, stepped rooftops?
 
Reflective paint could cut rooftop temperature by 20 per cent, UAE ...


https://www.thenational.ae/uae/envi...-by-20-per-cent-uae-scientists-claim-1.269459

Apr 20, 2014 - The technology was tested on a 197-square-metre area of the roof at the Masdar field station, where Watergy workers painted a third of the area with gray cool paint, which matched the original colour of the concrete, a third was painted white, while the remainder of open roof area was left uncoated.




White Roofs vs. Green Roofs: Recent Reports Declaring a Victor ...

https://www.huffingtonpost.com/noah-garrison/white-roofs-vs-green-roof_b_4914772.html

Mar 7, 2014 - Over the past month, several new studies analyzing the economics and environmental benefits of green roofs and cool roofs — or white roofs, a type of cool roof — have been published in national research journals. A number of periodicals and online stories have in turn reported on the studies, shining a ...
 
Rune said:
How much longer will the mcadam last,
sciency guy?
Paving is well over a million per mile.
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At least 30 years, maybe more!! This have to be done every seven years, although I'll bloody guarantee that's just hype. I remember you being giddy at the prospect of solar panelled roads, well that proved to be a total bloody disaster.
 
kudzu said:
White reflects light and heat.. In some parts of the world rooftops are white, genius.
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How does painting streets white help with "global warming" Einstein? So dropping the street temp from 120 degrees to a cool 110 degrees is worth $40,000 a mile? Tell us how many miles will it take to make any difference in the temp? You fucking idiots must have money to burn.
 
Eagle Eye said:
How does painting streets white help with "global warming" Einstein? So dropping the street temp from 120 degrees to a cool 110 degrees is worth $40,000 a mile? Tell us how many miles will it take to make any difference in the temp? You fucking idiots must have money to burn.
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You didn't bother to read ANY of the 4 links I posted, did you?
 
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