h a l f b a k e r yInexact change.
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Put a CD on top of hat, reflective side up. At the center of CD
drill a hole and put a small black chimney , 1 cm thick, 10 cm
tall. Put small holes on sides of hat.
CD reflects sunlight onto chimney heating it up, thus starting
passive convection drawing air from within hat
Statistics has
shown that 1% of any society in desert areas
will be willing to wear this hat.
This idea is an extension of another invention called "solar
cooling hat" on HB.
Solar Cooling Hat
Solar_20Cooling_20Hat
This idea is an extension of .... [baconbrain, Dec 11 2010]
Solar chimney on Wikipedia
http://en.wikipedia.../wiki/Solar_chimney
Black stack makes hot air rise. [baconbrain, Dec 11 2010]
[link]
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This has unlimitless potential [+] |
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taking that as a complement. |
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another invention? would you care to link it? |
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Soooo.... this is like cooling your house by building a fire in
the fireplace. Which does work, sort of. |
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Statistics show that 13% of people will believe anything, as
long as it's prefixed "statistics show." Unfortunately [VJW]
got the incantation wrong, so I'm not buying it. |
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This is old hat. It's just convectional widsom. |
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This is good. There is some room for improvement, including changing the title, but bun. [+] |
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"A solar chimney — often referred to as a thermal chimney — is a way of improving the natural ventilation of buildings by using convection of air heated by passive solar energy. A simple description of a solar chimney is that of a vertical shaft utilizing solar energy to enhance the natural stack ventilation through a building." |
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What CD would be most appropriate? Perhaps not “Fire, I’m on Fire”. |
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CD should not contain any data, especially microsoft
windows. |
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CD serves dual purpose. It completely reflects
sunlight from top of hat thus keeping the hat cooler.
Reflected sunlight falls on chimney, thereby creating
convection. Two birds in one stone! |
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For night use, a candle could be balenced upon the wearer's head to aid convection. |
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Indeed! Rather bad for those with lots of hairspray though... |
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