The Environmentalist Thread Message Board

STOCKTALK

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor. We ask that you disable ad blocking while on Silicon Investor in the best interests of our community. If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.

Politics : The Environmentalist Thread

Public Reply Prvt Reply Mark as Last Read File

Previous 10 Next 10 Previous Next

To: maceng2 who wrote (22320)	7/19/2008 3:27:25 PM
From: Thomas A Watson	Read Replies (2) of 36917

Dear pearly plus one, that experiment is interesting, but not ergonomically very useful. A light interior will reflect more visible light and some will leave the interior. The outer surfaces of a car will heat to very little, a few degrees at most for white to the very hot 150 and higher for darker. The speed interior surfaces heat will be greater the darker the color. Is it blast furnace in 5, ten, or 15 minutes etc. The test measured the saturation high heat temperature of the cars and I don't know that using the glass temp as a proxy for the interior temperature is as valid as one may think. The shape of a car would cause convective laminar flow from the hood and trunk surfaces up the glass and then up and away from the roof. the higher heats of air flowing over the surfaces could heat the glass a few degrees or possibly in an opposite effect cool the glass lower than the much higher interior temperature. Was the dark interior way hotter and the glass cooled to the 114. In the white car much less convection, much less glass cooling. I would measure the interior temperature with a standard thermometer placed in a white box located in a shaded place within the car with a many minute delay to reach the saturation temperature. Then one could also calibrate? the noncontact thermometer by measuring the temp of the regular thermometer and vice versa. I am not certain one needs to worry about the IR radiation effecting the regular thermometer temperature. But the white box would verify that. Every car I have had for the last decades, I always treated myself with window films that block 50 to 70% of the light coming through the window. That make a big difference in the speed a car's interior heats and I would guess extend greatly the time it takes to reach the full saturated temperature. And all interior surfaces would not ever get as hot as surfaces exposed directly to full sun. The glass with film however does get hotter than the temperatures reported.

Report TOU Violation

Share This Post

Public Reply Prvt Reply Mark as Last Read File

Previous 10 Next 10 Previous Next