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Old 05-07-10, 12:54 PM   #18
Xringer
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"Incidentally, this out-transmission of energy is pretty much the largest heat loss in solar heating panels.
Most of it occurs in the form of radiant heat loss right back out the glass/lens of the panel."

That's not really a big deal on solar hot-water systems, since the pumps turn off when the sun isn't out.
So, only the panel cools off, and not the hot-water in storage.

I remember my old hot-water panels warmed up super quick when the sun hit them in the morning.
I could hear the circulator pumps kick in pretty early in the morning.

~~~
IIRC, there was some kind of scheme to circulate coolant up to the cool
collectors at night, to capture some of that cold and pump it down into
the warmed-up house for cooling during warm summer nights.
Not sure how that would work around here..
(Actually, indoor heat would be pumped up to the roof).

Last edited by Xringer; 05-07-10 at 12:56 PM..
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