Quote:
Originally Posted by Jez77
I remember reading an article on different paint colours on cars.
Essentially there was no difference in the maximum internal temp any car reached regardless of the colour, the only difference was the amount of time it took to get to that temp and there was only about 10min in it.
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I've always read the exact opposite.
"The researchers developed a thermal model that predicted the air conditioning capacity (rate of heat removal) required to cool each vehicle to a comfortable final temperature of 25°C (77°F) within 30 minutes. (This is an industry standard for vehicle air conditioner performance.) Based on the experimental measurements, the analysis predicted that the capacity required to cool the cabin air in the silver car is 13% less than that required in the black car."
"Using a white or silver paint (solar reflectance = 0.60) instead of a black paint would raise fuel economy by 0.44 mpg (2.0 percent). It would also decrease carbon dioxide emissions by 1.9%, and reduce other automotive emissions by about 1%."
https://eta.lbl.gov/news/article/110...duce-emissions
I know the Prius has a 4500w HVAC so that would equate to about 292.5 watts saved for that 30 minutes then level off. That's pretty significant given its smaller hybrid battery and how much using the hvac kills the battery around town when the engine is off at stop signs or coasting.
I remember reading a more detailed report in 2016 on window tints, and vehicle colors but I couldn't find that one.
I second the IR gun in a parking lot. You could easily measure roof surface temp and cabin temp with them. I'm gonna do that one day when I'm roaming around campus with my IR gun.
I'd say when you get some measurements buy a can of white plastidip and have at it.