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Posted by Jeffrey Lebowski on February 2, 2007, 10:38 pm
> Greetings,
> I grow hydroponic lettuce in a greenhouse in Missouri. The plants are
> watered by a continuous stream of solution, which I also use to heat
> and cool the plants instead of heating and cooling the entire
> greenhouse.
> As you probably realize, this still requires a lot of
> electricty. What I was wondering, would it be effective to run the
> solution underground (like a geosourse heat pump without an exchanger)
> to aid in shedding some of the heat from the solution in the summer?
> It is my
> understanding, that around here, the ground stays a constant 60 F at
> least four feet. Would it be effective to bury - say 300 feet at
> 4 feet deep to help chill the solution or possibly warm it in the
> winter?
> My biggest concerns are that since the temprature gradient is so
> narrow that it may take a lot more buried pipe, and electricty to do
> the extra pumping, and that it wouldn't be worth it. Any help anyone
> could lend would be greatly appriciated.
>
At what temp is the water at when it exits the well ( or other water
source ) and how many gpm can you consistantly obtain from it ?
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