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Posted by N. Thornton on October 8, 2004, 5:58 pm
 

I guess thats true in terms of max energy capture, you'd use the
better performing panel on the preheat tank when the main tank was too
hot for the panel to do much there.

Trouble with solar is its always a balancing act between energy return
and price investment, and I would think that adding more plumbing,
electric valve controls and the necessary control trickery would add a
fair bit to the amount of work and equipment needed for
implementation. The extra cost might not pay well on small systems -
though I presume large systems would warrant it.

NT

Posted by N. Thornton on October 8, 2004, 5:59 pm
 

I guess thats true in terms of max energy capture, you'd use the
better performing panel on the preheat tank when the main tank was too
hot for the panel to do much there.

Trouble with solar is its always a balancing act between energy return
and price investment, and I would think that adding more plumbing,
electric valve controls and the necessary control trickery would add a
fair bit to the amount of work and equipment needed for
implementation. The extra cost might not pay well on small systems -
though I presume large systems would warrant it.

On second thoughts, perhaps a polythene covered dometic rad could be
used as the perheat tank as well as preheat panel, then the system
gets noticebaly simpler.

NT

Posted by N. Thornton on October 8, 2004, 7:25 pm
 
I guess thats true in terms of max energy capture, you'd use the
better performing panel on the preheat tank when the main tank was too
hot for the panel to do much there.

Trouble with solar is its always a balancing act between energy return
and price investment, and I would think that adding more plumbing,
electric valve controls and the necessary control trickery would add a
fair bit to the amount of work and equipment needed for
implementation. The extra cost might not pay well on small systems -
though I presume large systems would warrant it.

On second thoughts, perhaps a polythene covered dometic rad could be
used as the preheat tank as well as preheat panel, then the system
gets noticebaly simpler.

NT

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