Originally Posted by rebul
I just purchased 60' of 3/4" copper tubing that came in a coil. What is best way to use this on my roof to get maximun heat transfer for the water to replenish my home hot water tank? Thanks ,Rebul
Dull black paint on the tubing will absorb more of the 60 watts per square foot that sunlight gives you but the paint would have to withstand hi temps.
By the way, this pipe will hold 1.4 gal of water which will be heated by the equivalent of a 6w heater, at best. This would raise the water temp 1.5 degrees F per hour.
This might not be a practical idea, though it does work in principle.
"Idiots" = ad hominem?