Solar Evacuated Vacuum Tube 100 ounces of water boiling

http://greenpowerscience.com/VACUUMTUBE1.php
This is a preview of a 5 ft solar evacuated vacuum tube I will be using in a large trough. These tubes are very efficient and work by absorbing sunlight and keeping the heat

Category:

Science & Technology

Tags:

• SOLAR
• VACUUM
• TUBE
• EVACUATED
• WATER
• BOILING
• preview
• youtube
• environment
• diy
• science
• outdoors
• instruction

[ward26102]

Great video Dan.! Where did you get that tube? Did you buy it or build it? Is it more efficient than the beer bottle evac tubes you built? :)

[GREENPOWERSCIENCE]

@ward26102 Hi,

They have been around overseas for years. This is factory made and more efficient because the vacuum is very good. I am working on getting a bunch from a seller overseas where the are made. I have bought a few locally but they are never packaged correctly and shippers usually break them. I will have some in about 2 weeks.

[ZeroFossilFuel]

All of you complainers, stop whining. Yes these have been around a while. Yes they retain heat. Yes they work on cloudy days. Not everybody has seen these. Not everyone is quite so perfect as you. It's important to present them everywhere possible.

Dan, pay no attention to the peanut gallery.

[repawnd]

I must admit this concept is new to me but I just had a thought, if you connected this to a steam engine do you think it could possibly be more efficient than solar cells?

Or maybe a stirling engine would be better because it could still run even if the water has stopped boiling.

[decycle1]

@GREENPOWERSCIENCE Jimmy carter actually had them installed on the white house.Ronald Reagan did away with that.

the vacuum tube is also omnidirectional so it only needs to point south and it collects heat throughout the day does not need to be adjusted for sun position

[luc59457]

It would be nice to somehow eliminate the need for a solar tracker. maybe with Fresnel lenses all around in small enough strips, on a clear square box around the Vacuum tube? Maybe it can stay horizontal and sun will always be concentrated somewhere on the tube in that moment of day but not everywhere? One less moving part is always better to me.

[dismutased]

@ribar3 abolutely! In fact many solar hot water systems use evacuated tubes (google solar hot water system evacuated tubes). It's definitely a more efficient way of harvesting heat energy from the sun.

[rainbowsalads]

@rainbowsalads

ignore that, it wouldn't work . needs the glass on the outside. duh!! : /

[rainbowsalads]

CryotechFlex make vacuum piping, its chrome but could be painted black to shine a fresnel lens or trough mirror on. that would be cool to try out. (counts pennies in jar).

[rainbowsalads]

@screamingservers Thanks for your reply. Would be great if they made these as an actual vacuum pipe then water could flow through. Although it would be possible to use a trough mirror if the vacum tube was outside the focal point so it is not so harsh. otherwise yes it would probably explode. lol : P 

[screamingservers]

@rainbowsalads I think the tube would blow unless water was moving pretty fast. Most troughs use metal pipe.

[mrgreenbeans]

hi dan, can you get them with it being open at both ends,and longer. i would like to use this on a parabolic trough.

[CncObsession]

@Slayermachete Its the probing by the aliens Dan is scared of, or is he?