Tal Bejerano - AMC wrote:
>
> Hi Martin
>
> I think the all system will not work, even if you have water source below
> 10c.

In Hungary the water temperature whitch come from the earth always
12..15C. Some nursery use this for heat/cool his greenhouse. They simply
spraying the water beetven the two layer of roof. In sumer can be cool
down the inner temperature about 5..10C below the outside
temperature(25..40C). In winter can be heat up the greenhouse about
+2..10C when the outside temperature 0..-25C. Only one problem is the
iron oxid in the water, because this paint the roof to red. So, if you
use high speed water flow and low speed air stream you get good result.
I think good way, mesure the outgoing water and air temperature and
control about this the ventillator speed.

udv
Csaba

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