DIY SOLAR TUBES EVACUATED VACUUM TUBE SOLAR HOT WATER Boil water with the power of the SUN

Boil water just by placing it in the sun.
http://www.greenpowerscience.com/
This is a simple process to make your owns solar evacuated vacuum tubes from any bottle and a $2 vase from Walmart.

Category:

Science & Technology

Tags:

• SOLAR
• POWER
• ALTERNATIVE
• ENERGY
• EVACUATED
• VACUUM
• TUBE
• SUN
• FRESNEL
• LENS
• PARABOLIC
• REFLECTOR

[kozybearcat]

This is silly. The vacuum created does nothing useful. You need 10,000 less air than atmospheric to do anything. This level is not really do-able by a DIYer. Do yourself a favor and just skip the vacuum step.

[GREENPOWERSCIENCE]

Nope, any vacuum contains less atoms, less atoms equal less conduction, less conduction equals greater heat retention for this process.

watch?v=AFwG1RPbxlc

The professional tube in this video has a vacuum created simply by the heat making glass process then from cooling. It boils water in plain sunlight.

[the1969info]

Hi Dan, thanks so much for your great videos, I can't get enough of them. I have seen other videos how solar evacuted tubes work. Could you put a vacuum sealed copper tube into the inner bottle and will it heat up. If so could you use it in cold weather to heat your vehicle while your indoors or have a long enough copper tube, you could attach it to your home like a solar heater. The heated tube would be exposed indoors, the ceiling fans would distribute the heat?? Thanks again, great videos!!!!

[GREENPOWERSCIENCE]

Thank you for the cool comments:-)

I think you would need a much larger surface area. I think large sheets of double glass could do it. Consider the coroplast heater with a glass cover

watch?v=SF_mEoFRSAQ

[grayjc]

Dan, thanks for the information. I made one of these today (2 inch glass vase inside of 4 inch glass vase) and everything seemed to be fine, except I had some contraction with the epoxy and some cracking began in the epoxy. Not a problem since I used more epoxy to contain the cracks. I pulled a vacuum (25 in Merc) and let it sit for while in the garage. After about 1 hr the whole thing emploded. Sorry I wasn't there to see it, but I did hear it. Will try again later with thicker glass.

[GREENPOWERSCIENCE]

The vacuum does not need to be that strong. The first one I did, the bottled popped loose and flew to the bottom shattering the glass. That may be what happened. You need a rim on the inner vase for the resin to lock on to. A rimless inner container will simply pop loose as resin has poor surface adhesion to glass. The method in this video is, the vacuum sticks the outer vase and the ridge locks the inner one in.

If they pop loose with a vacuum, they accelerate very fast.

[Perfectg]

Instead of using a vacuum pump (as many folk don't have access to one) then you can simply heat the vase with the hole drilled in the resin open and then put a stopper in it. As the air inside cools you will end up with a vacuum. You can almost create what ever vacuum you need using this method easily enough to implode your vase so go gentle to start with. A little bit of water inside acts as a vacuum lost indicator as water will remain vapour in a vacuum but condensate out if you lose it.

[thesimulacre]

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

[SeeTheWholeTruth]

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]

@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]

When do we get to see the water boil?

[Mrzoo2021]

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]

Thank you very much for sharing this valuable information.

[slavkok68]

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]

How does this produce heat?

[Jabarcher13]

your great man.

[craftmatic2]

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.