DIY solar pool heater

alex6999

Well-known member
Jun 22, 2018
54
Toronto, ON
If I buy 3 black car hoods from junk yard, install it, and weld steel pipes on trunks sides, will it work?

Is stainless pipe important? They are very expesive,

My pool is 35000 gal and never excide 79. Now is 73 and it's too cold for swimming.
 

alex6999

Well-known member
Jun 22, 2018
54
Toronto, ON
Interesting. Let's calculate
Advanced Drainage Systems
3/4 in. x 500 ft. 100 psi NSF Poly Pipe
$138

3/4 inside diameter, let's say 7/8 outside.
500*(7/8)/12=36.5 sq ft
Or $3.78 per sq ft
Vs $4 per sq ft for sunquest panels

Plus lots or plywood etc.
Same

Polyethylene is not good thermal conductor, no, very bad. Garden hose will be much better, $20 per 100ft, but it thinner and with unknown resistance to chlorine

Polyethylene highly resistance to anything. But heat transfer.

I tend to sunquest panels, cause I suppose they made from high heat transfer material.

But... thermal conductive of plastics less than 1, polyethylene 0.1-0.5, while steel if 50 and copper is 400.

Polyethylene much closer to heat insulators, than to heat conductors.