Does a dark-colored car heat up more in the sun than a light-colored car?

Saturday, 23 January 2010

When you start thinking of buying a car, did you ever confuse of what colour of car you are going to buy? Many people said that a dark colored car will effect more heat inside (when day time especially). Then, just because of this opinion, then you change your mind from buying the dark one and choose the light one, (while you prefer the black one , like i do @_@) woooww..wait a minute---Maybe some explanation will change your opinion about hearsay. Let's see then....


The external color does not significantly affect how much the inside of a car heats up in the sun, says Sanford Klein, director of the UW-Madison Solar Energy Laboratory and professor of mechanical engineering.
Cars warm up in the sun due to the greenhouse effect: Sunlight passing through the windows into the car is mostly absorbed by interior surfaces, then radiated back to the air as heat. That heat does not pass back through the glass, which is an effective insulator for radiation, and the inside temperature can rise above the outside temperature.
“The visible radiation that we see is transparent to the glass but thermal radiation is not and gets trapped by the glass,” Klein says. “As a consequence, the inside of the car will warm because radiation is coming in but not much is going back out.”
The interior color may make a small difference in internal temperature, he says, because darker internal surfaces will absorb slightly more solar energy than light ones do.
Tinted glass will have an even more pronounced effect, he says, by reducing how much solar radiation enters the vehicle in the first place.
 So---what you think now? 

1 comments:

tas wanita 21 March 2011 at 9:42 pm  

Interesting article :) I always thought exterior colour had a great impact to the heat inside the car! Thanks for sharing, now I know.

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