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Solar Evacuated Tube Vacuum Tubes DIY Test in the Sun

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Uploaded by on Nov 22, 2008

This is part 2 of the Solar Tubes with a control bottle and sun exposure. My website link for the results and videos are http://www.greenpowerscience.com/SOLARTUBE.html

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Uploader Comments (GREENPOWERSCIENCE)

  • could you explain the physics of why this happens? I am baffled by this

  • @lerch25 Hi,

    Heat conducts through air molecules. A vacuum has almost none so it keeps heat inside. This is just like a regular vacuum thermos but clear outside and dark inside so sunlight can build heat faster.

  • Are there algae solar experiments around anywhere?

  • I actually will be doing one in a few, waiting for the panels to go on sale.

Top Comments

  • celcius....

  • For a control, you could use no vacuum in the housing.

    You would find that a bottle just in a green house would perform very well.

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All Comments (62)

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  • I tought it's a diy vacuum tube....the one for amps.

  • @advthinker If heat wont travel through a vacuum. How does the sun warm planet earth ?

  • Thats pretty neat. Those things have all kinds of possibilities.

  • How do u make it ?

  • we all know that heat wil not traverse a vaccum. the real trick is to use a gas that makes it hotter! look at mars it forms a natural laser because of the co2. the first solar ac was a evcated tube system, that used co2 to increase the temp in the manifolds. eazy to make co2 with vinegar and bakesoda. and put inside of jars to exp. with. dont wait for dan try it yourself.

  • @GREENPOWERSCIENCE hey what would happen if you use argon instead of a vacuumed atmosphere

  • Planck Black Body Experiment. For heating. Nifty Keen-O!

  • I think the experiment could be flawed. this only shows the greenhouse effect.

    the comparison should be a container with a vacuum against a container with plain air or other gases.

  • I feel that all hot water tanks for new residential & commercial builds, should have passive heat exchangers installed in them. This should become mandatory.

    One way of supplying the heat exchanger would be to design a ridge vent system that works in two ways. During sunlight, the ridge could be designed to become marginally hotter than the temperature of the ambient attic air. This would naturally draw this air to the vent. It would cool the attic and at the same time heat the hot water.

  • i boiled water in a coke can just by leaving it in the sun Thanks AUSSIE sun

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