Solar vacuum tubes natural water flow 10-tube array

http://cleanrepublic.com/box_of_solar_vacuum_tubes.html

Like our ideas? Please become an FB fan of Clean Republic! Easily harness the power of the sun to heat anything inside these tubes! Even boils water after just a few hours in the sun! No moving parts. These incredible double-wall tubes have a thermos-type vacuum seal between their walls, a light absorbent coating on the outer wall of the inner tube, and three heat reflective layers on the inside surface. Sunlight and heat go in, but don't come out until you want it.

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[MrArrow1961]

Such setup not correct to reach max system efficiency:. Heat water will go up, if you will have problem with tube installation level, then only ½ of tubes will work more or less efficient. In such systems water collector must be on top and all tubes must be at 45 degree to sun and opening to the top collector.

[THeScoobyNoob]

Great Idea. I hope that is cpvc and not pvc pipe because pvc is only rated to around 85f and will disintigrate under high heat in time.