Go Back   EcoModder Forum > EcoModding > General Efficiency Discussion
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 05-22-2012, 03:17 PM   #1 (permalink)
Cyborg ECU
 
California98Civic's Avatar
 
Join Date: Mar 2011
Location: Coastal Southern California
Posts: 6,297

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 66.42 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
Thanks: 2,373
Thanked 2,168 Times in 1,467 Posts
Solar reflective auto paint

The findings reported here might be of interest to some of you, especially if you are considering buying a car or repainting yours:

Cool Science: Cool Cars | Heat Island Group | heatisland.lbl.gov

Here's the core point:

Quote:
A light-colored or cool-colored car shell reflects more sunlight than a traditional dark car shell. This cools the cabin air and reduces the need for air conditioning. A recent study found that after parking in the sun for an hour, a silver Honda Civic (shell SR 0.57) had a cabin air temperature about 5-6°C (9-11°F) lower than an otherwise identical black car (shell SR 0.05). Modeling indicates that substituting a silver (or white) shell for a black shell would allow the specification of a 13% smaller (lower capacity) air conditioner, improving fuel economy.
The site cites this study for the above information:

Levinson R, Pan H, Ban-Weiss G, Rosado P, Paolini R, Akbari H., "Potential benefits of solar reflective car shells: Cooler cabins, fuel savings and emission reductions," Applied Energy (2011).
http://heatisland.lbl.gov/publicatio...-and-emission-

__________________
See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.



  Reply With Quote
The Following 3 Users Say Thank You to California98Civic For This Useful Post:
aerohead (10-03-2022), littlecars (07-16-2015), mcrews (07-16-2015)
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 05-22-2012, 03:35 PM   #2 (permalink)
Master EcoModder
 
Join Date: Feb 2009
Location: Phoenix
Posts: 595
Thanks: 106
Thanked 113 Times in 71 Posts
Indeed?



I've always been a fan of white roofs for this reason (even reducing duty cycle of factory equipped "overpowered" a/c unit, which has to be almost as good as having a smaller one...) - all our non-A/C cars received white paint jobs on the roof when I was a young'n... and I've been putting some serious thought into doing up my WJ that way.
__________________
2005 Escape 2.3 MT 2WD
2002 Mustang 3.8 AT
2015 Ram 1500 5.7L 4WD
2002 Motobecane 700DS
  Reply With Quote
The Following 2 Users Say Thank You to shovel For This Useful Post:
littlecars (07-16-2015), mcrews (07-16-2015)
Old 05-22-2012, 03:46 PM   #3 (permalink)
Pokémoderator
 
cfg83's Avatar
 
Join Date: Dec 2007
Location: Southern California
Posts: 5,864

1999 Saturn SW2 - '99 Saturn SW2 Wagon
Team Saturn
90 day: 40.49 mpg (US)
Thanks: 439
Thanked 530 Times in 356 Posts
California98Civic -

We've always had white cars in my family going back to my Dad's 1960 Chevy Impala (not ours but close enough) :



My Dad's an engineer, and I am pretty sure he told me that he picks white for cooling reasons.

This is true of homes as well. Aesthetically most people wouldn't select white roofs, but they $ave a lot of money and degrade slower than traditional roofs. I remember driving out of Las Vegas one day and seeing a *WHITE* Spanish tile roof on a home. I just wanted to clap my hands.

More studies :

FSEC-CR-1220-00


Quote:
In summary, this evaluation strongly confirms the energy-saving benefits of using more reflective roofing systems in Florida. Selection of colors with higher solar reflectance will result in tangible cooling energy savings for customers. This is particularly true for roofing materials such as tile and metal, which are currently available with solar reflectances of 65%-75% range. The selection of reflective roofing systems represents one of the most significant energy-saving options available to homeowners and builders. Such systems also strongly reduce the cooling demand during utility coincident peak periods and may be among the most effective methods for controlling demand.
CarloSW2
__________________

What's your EPA MPG? Go Here and find out!
American Solar Energy Society
  Reply With Quote
The Following User Says Thank You to cfg83 For This Useful Post:
mcrews (07-16-2015)
Old 05-22-2012, 04:11 PM   #4 (permalink)
NightKnight
 
NachtRitter's Avatar
 
Join Date: Dec 2008
Location: Placerville, CA
Posts: 1,594

RippinRoo - '05 Subaru Legacy Wagon 2.5 GT
Subaru
90 day: 21.16 mpg (US)

Helga - '00 Volkswagen Jetta TDI
TEAM VW AUDI Group
Diesel
90 day: 53.91 mpg (US)

Olga - '03 Volkswagen Jetta Wagon
90 day: 46.24 mpg (US)
Thanks: 303
Thanked 311 Times in 186 Posts
Same here... have had only white cars since as far back as I can remember... (part of the reason my avatar is white too! )
  Reply With Quote
Old 05-22-2012, 04:41 PM   #5 (permalink)
Drive less save more
 
ecomodded's Avatar
 
Join Date: Jul 2011
Location: Vancouver Island, Canada
Posts: 1,189

Dusty - '98 VOLKSWAGEN Beetle TDI
TEAM VW AUDI Group
90 day: 60.42 mpg (US)
Thanks: 134
Thanked 162 Times in 135 Posts
My car is black, so i seek out the shade,desperately when parking during the summer. In the winter my car benefits from being warming do to the solar heat.
Also black is waaaaaaaaaay cooler of a color choice.
White won't cut it fer me, especially in my N Beetle..
I do like grey/silver.
__________________
Save gas
Ride a Mtn bike for errands exercise entertainment and outright fun
__________________



  Reply With Quote
Old 05-22-2012, 05:08 PM   #6 (permalink)
Master EcoModder
 
Join Date: Feb 2009
Location: Phoenix
Posts: 595
Thanks: 106
Thanked 113 Times in 71 Posts
That white tile house roof... damn... that looks good. Even without the thermal benefits it just looks good.
__________________
2005 Escape 2.3 MT 2WD
2002 Mustang 3.8 AT
2015 Ram 1500 5.7L 4WD
2002 Motobecane 700DS
  Reply With Quote
Old 05-22-2012, 05:14 PM   #7 (permalink)
Master EcoModder
 
Join Date: Jun 2008
Location: Earth
Posts: 5,209
Thanks: 225
Thanked 811 Times in 594 Posts
Quote:
Originally Posted by cfg83 View Post
This is true of homes as well. Aesthetically most people wouldn't select white roofs, but they $ave a lot of money and degrade slower than traditional roofs. I remember driving out of Las Vegas one day and seeing a *WHITE* Spanish tile roof on a home. I just wanted to clap my hands.

CarloSW2
I've long admired this one, which I often pass on the way to one of my favorite hiking/biking trails: Carson Valley Nevada Real Estate - Gillmor Coons Real Estate Group | Search Properties If it weren't such an overkill - 13 garages! - I'd make an offer.

Likewise with white cars: the thing I regret most about my Insight is that it's silver instead of white.
Attached Thumbnails
Click image for larger version

Name:	ac1.jpg
Views:	102
Size:	29.7 KB
ID:	10860  
  Reply With Quote
Old 05-22-2012, 05:15 PM   #8 (permalink)
Pokémoderator
 
cfg83's Avatar
 
Join Date: Dec 2007
Location: Southern California
Posts: 5,864

1999 Saturn SW2 - '99 Saturn SW2 Wagon
Team Saturn
90 day: 40.49 mpg (US)
Thanks: 439
Thanked 530 Times in 356 Posts
ecomodded -

The other good thing about silver is that unpainted pizza pans are close in color.

But white can look wicked :



CarloSW2
__________________

What's your EPA MPG? Go Here and find out!
American Solar Energy Society
  Reply With Quote
Old 05-22-2012, 05:37 PM   #9 (permalink)
Pokémoderator
 
cfg83's Avatar
 
Join Date: Dec 2007
Location: Southern California
Posts: 5,864

1999 Saturn SW2 - '99 Saturn SW2 Wagon
Team Saturn
90 day: 40.49 mpg (US)
Thanks: 439
Thanked 530 Times in 356 Posts
jamesqf -

That's egg-zactly the picture I was looking for, one where you could see the classic Spanish tile roof :



CarloSW2
__________________

What's your EPA MPG? Go Here and find out!
American Solar Energy Society
  Reply With Quote
Old 05-22-2012, 06:09 PM   #10 (permalink)
PSmodder lurker
 
Join Date: Jan 2009
Location: Chino
Posts: 1,605
Thanks: 26
Thanked 908 Times in 522 Posts
Still waiting for this vaporware colloid. Getting a charge out of solar 'paint'

  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2022, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com