Quote:
Originally Posted by coldlegs
First the pre-amble.
Just built a flip top observatory (link here http://www.iceinspace.com.au/forum/s...ad.php?t=81602 ) and the question about how to minimise the heat build up inside it arose. PeterM suggested painting the roof using silvered bitumen paint to reflect sunlight. This is the stuff here.
http://www.pscoop.com.au/newweb/msds...lvershield.pdf . I agree with peter that it's a good idea to do that and I thought of another way to use it but I'm not sure if it would work.
What if I paint the inside as well? The question is “would the silver finish minimise the infra red radiation from the inside wall to the inside of the observatory”? My backyard physics expertise says it would but I'm not sure.
Another question is “would the bitumen component of the paint stop dew forming on the inside of the roof and walls”? That would be a serious bonus if it did.
Thinking caps on folks! There has to be a materials expert out there somewhere!
Cheers
Stephen |
Paint it white. It is the most efficient reflector of heat. Silver on the other hand will absorb heat, depending on how dark it is.
Brett