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webaware · 05-03-13, 08:27 AM

I'm planning on making some solar water heater panels out of old radiators, painted black, placed in boxes lined with expanded polyurethane sheeting, covered with 'twinwall' acrylic sheeting.
The plan is for the water in the panels to circulate through the indirect loop inside an immersion tank. This tank will provide pre-warmed water to the main immersion tank in the house.
The pre-warming immersion tank, and panels are all to sit on a flat roof section of the house (immersion tank in a well lagged box).
I'd like to have the solar heated water loop driven by conduction. I thought that a vertical 2m 22mm copper pipe connected to the hot-out side of the panel array might give sufficient draw to power the loop.
Any thoughts or useful links please.

05-03-13, 08:27 AM	#5
webaware Lurking Renovator Join Date: Mar 2011 Location: wales, uk Posts: 9 Thanks: 6 Thanked 0 Times in 0 Posts	Convection Driven Solar Water Heater Advice Wanted I'm planning on making some solar water heater panels out of old radiators, painted black, placed in boxes lined with expanded polyurethane sheeting, covered with 'twinwall' acrylic sheeting. The plan is for the water in the panels to circulate through the indirect loop inside an immersion tank. This tank will provide pre-warmed water to the main immersion tank in the house. The pre-warming immersion tank, and panels are all to sit on a flat roof section of the house (immersion tank in a well lagged box). I'd like to have the solar heated water loop driven by conduction. I thought that a vertical 2m 22mm copper pipe connected to the hot-out side of the panel array might give sufficient draw to power the loop. Any thoughts or useful links please.