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Author Topic: California to ban black cars to reduce emissions.  (Read 474 times)

firedome

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California to ban black cars to reduce emissions.
« Reply #15 on: April 03, 2009, 07:38:29 AM »

Snotts is essentially correct - but the black car won't be as cool
inside, all other variables being controlled.  The potential CA
reg does have a basis in fact.. when I was a kid Baltimore County had
black police cars and in 1959 they did tests that found the black cars
averaged something like 12 degrees warmer inside than a white car on a
sunny day at 80 degrees... we've all experienced this, we know black
absorbs more radiation.  So Balto painted their car roofs white,
then later the cars became all white.  That said, the potential CA
reg reaches new heights of meddlesome absurdity. 

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Snotty

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California to ban black cars to reduce emissions.
« Reply #16 on: April 07, 2009, 09:36:59 AM »

Quote from: firedome
Snotts is essentially correct - but the black car won't be as cool inside, all other variables being controlled.  
 
Yes, that's why I said the fan would be set on a higher speed.  What pisses me off is the idiots that are equating this heat with higher energy use; that's just absurd.
 
However, on a hot summer day here in Bakersfield I would have chosen my '62 Black with a white top New Yorker any day over the all-white Mercedes I drove.  That car was just HOT!!!  For that matter, the NY was cooler with the AC off (it didn't work, so I had no choice) than was my tan Cordoba or my red Dakota.  Both of those are very warm inside, even on a moderate day.   I think the reason is the fresh-air system.  Both the Cordoba and the Dakota draw air from under the hood.  They do not have above hood venting.  I think the air is pre-heated before it enters the cab.  I do not have this problem with any of my cars that have venting above the hood, or through the wheel wells as the '70 does.
 
The one exception was the Mercedes.  It had above hood venting but was still a hot mother!
 
Here's something I heard on a local radio show from a guy who was a Science Teacher like yourself.  He pointed out that black absorbs heat while white reflects it.  Therefore, white cars can be blamed for global warming for reflecting the heat back into the earth, whereas black carts should be mandated for absorbing the heat!
 
I liked his thinking!   
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Steve

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California to ban black cars to reduce emissions.
« Reply #17 on: April 07, 2009, 10:10:52 AM »

I might see you spinning the blower faster for a time. . . . 
 
Auto temp control?  Bunch of SUV drivers with nothing else better to do.  Ohhhh  look at me, my name is in the paper!
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firedome

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California to ban black cars to reduce emissions.
« Reply #18 on: April 08, 2009, 06:42:16 AM »

Interestingly, it's a double edged sword, as black also radiates heat
the fastest, once it has been produced or absorbed... painting a heat
producing object flat black will keep it the coolest, including
engines.  Black body radiation is a very interesting area of
specialization within physics. 

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