Hybrid Car – More Fun with Less Gas

Will this work?

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Posted by Rajesh Bhat on July 4, 2012, 9:19 am
So, I have a question for the expert mechanical engineers. Suppose I
place 100 thin steel tubes (10 m long, say) parallel to each other on
a flat roof. And I paint them black so they get really hot in the sun
(150+ degree Fahrenheit possibly?). On one end i make all these tubes
converge at one point using metal tubes. And i cool this junction
using water to a low temperature (Say 75 Fahrenheit). So i have
created a temperature differential. Will the hot air from the pipes
rush towards this cold end? Will the air move at a high enough
velocity to drive a small wind turbine like structure placed at this
junction? Is this a viable idea for generating electricity using solar
thermal energy using inexpensive materials? If yes, how much area
would be required to generate 1 KW?

Posted by Rheilly Phoull on July 4, 2012, 10:00 am
On 7/4/2012 5:19 PM, Rajesh Bhat wrote:

Hmm, thin tubes and high air flow (at atmospherical pressure) don't
really belong in the same sentence. The idea as been mooted using a
large canopy to collect the air and funnel it up through a turbine but
it would seem a large area would be required AFAIK.

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