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Aug/0910
Aug/0910
Solar Evacuated Tube Vacuum Tubes Diy Test In The Sun
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.greenpowerscienc…
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8:19 pm on August 27th, 2009
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.
8:31 pm on August 27th, 2009
use degrees!!!
8:38 pm on August 27th, 2009
celcius….
9:28 pm on August 27th, 2009
lol your cold
10:21 pm on August 27th, 2009
Have you thought of sealing a dome over your mirrors outside of the focal point a installing a coil to be heated at the focal point. The sealed chamber could then be evacuated.Thanks for triggering the ideas. Good work you do.
10:53 pm on August 27th, 2009
interesting…
11:42 pm on August 27th, 2009
Dan,very interesting show us what the heat difference would be without the vacuum, but still in the same contraption. I think your vacuum isn’t strong enough to make a very big difference regarding convection cooling. You’re mainly seeing air as an insulator I hypothesize.
11:49 pm on August 27th, 2009
The temp diff you have is because the heat can leave non vacuum bottle through convection of the air on the contact surface, while the bottle in the vacuum valve cannot rid heat that way. The vacuum valve preserves the energy better than the other one because of this. Still heat can dissipate through radiation.
12:29 am on August 28th, 2009
Plus you didnt use the reflector method behind the bottle like you mentioned in your previous video. Still, some wide parabolic shape could probably put 1000W onto that bottle.
12:42 am on August 28th, 2009
By parabolic shape I meant just a flat piece of material with a very shiny surface bent to where it will focus the light onto the bottle. Using that method, one evauated tube would collect alot of heat, but it would have to track the sun, still it saves on using many glass tubes.