Quote:
Originally Posted by Cole_Robbie
The best idea I had for wood heat for my greenhouse, which I didn't have the money for, was to run pex tubing through the gravel floor and use a wood stove to heat the water that ran through it. There's a product I looked at that is a hollow metal element to install in a wood stove so that it will heat the water inside. It is possible to circulate water without an electric pump if the stove is slightly below the system, like an old-fashioned boiler.
The best solar idea I saw is called active solar. Instead of water-filled tubing through the gravel floor, air ducts pull air down into the rock to heat it during the day. At night, the fans reverse, and pull air back up out of the warm rock.
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geese what a great idea....Pex ! I have bundles of pex (Blue, Red, White) but I actually use it for "non plumbing " purposes ...LOL
I see the problem is justifying the next "upgrade" step to the full system green house from ..the unheated solar only etc.....
Most can get stuck at the point of only using temp "auxiliary heat sources" to tide them over the sticky times of the extended season.
I have a solar fountain pump in my place I am trialing as development ...it is a cheap one that only is useful at about 1 ft or less but it does move water at the hottest/brightest sun part of the day ......one could make a step system with 4 pumps to get 4 ft of lift etc.(reread your Bernoulli ..LOL) I believe all these are readily convertable to 12vdc
with 12vdc one could have marine battery back up power for circulation as well
I guess a Big green house would take a lot of these cheap pumps ...but it could be done ........
Wouldn't it be nice to have a solar circulation pump with a woodstove optional thermal upgrader in the line ....LOL
