thesimulacre (November 30, 1999 at 12:00 am)

Anytime I wonder if I could DIY something, you two are ALL OVER IT. <3 you guys, really.

SeeTheWholeTruth (November 30, 1999 at 12:00 am)

Couldnt you use a basic deep food canner, and utilize a jar within a jar, sealed(steel weave putty), then "can" them in the pressure cooker, to make the vacuum seal? Also Im curious if there is a DIY method of getting that coating that gives the higher infrared spectrum with the interior bottle, rather than the black?

imachavel (November 30, 1999 at 12:00 am)

@GREENPOWERSCIENCE you don't need any sun light if the vacuum is as pure as the vacuum of space. in a pure vacuum, with no pressure, water doesn't resist in a liquid form, it turns straight from ice into vapor. that water should have boiled at room temperature. what is amazing to me is that there is so much pressure in our atmosphere, that at the right temperature water will retain in a liquid form just because of air pressure. it isn't how little pressure is in a vacuum but how much pressure e

M1ST3RHYDE (November 30, 1999 at 12:00 am)

When do we get to see the water boil?

Mrzoo2021 (November 30, 1999 at 12:00 am)

Hey Dan I was just thinking, would it be possible to Fill the vacuum with a gas like between double pain glass window and would it make a difference.

espejocielotierra (November 30, 1999 at 12:00 am)

Thank you very much for sharing this valuable information.

slavkok68 (November 30, 1999 at 12:00 am)

About vacuum. You need recent vaccum to have benifit of it. If you don't belive just put two same devices on the sun, one without vacuum (but closed) and other with just 1/10 of atmosferic pressure. The result is near same. The change is introduced probably beacouse of watter vapour has higher transfer ratio as air and air is not dried. The real benifit of vacuum start's under 1 torr vacuum, and that's hard to maintain in hobby system.

mmaaxx1198 (November 30, 1999 at 12:00 am)

How does this produce heat?

Jabarcher13 (November 30, 1999 at 12:00 am)

your great man.

craftmatic2 (November 30, 1999 at 12:00 am)

I'm not sure how much the vacuum is worth it, but I think that if you half the amount of air in the tube it would half the rate of conduction to the outer wall. If you could get a half-bar vacuum it would be twice as good as air. Probably breaks most glass though, because that is around 7.25psi negative... A 15% vacuum, i.e. 85% of atmosphere, would be around 30% better insulator than 1 atmsophere air. After 50% vacuum, is exponential increase in insulator, but surely impossible to DIY.