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Posted by franz fripplfrappl on February 18, 2008, 2:52 pm
On Mon, 18 Feb 2008 18:42:33 +0000, aemeijers wrote:
> franz fripplfrappl wrote:
>> Here's what I'd like to do:
>>
>> Run well water through a geothermal heat exchanger and then discharge
>> the same water into the yard and eventually into a pond.
>>
>> I prefer not to go underground and below frost depth with discharge
>> pipe.
>>
>> I would like to simply have water discharge above ground. How can this
>> be done without discharge pipe freezing?
>>
>> My first thought is a antisyphon device similar to what's on outdoor
>> spigots.
>>
>> Discharge pipe is 1".
>>
>>
> If it gets cold enough, it'll freeze. What you propose is basically the
> same as a fountain or backyard water feature. The running water will
> slow down the freezing action, but the outlet hole will keep getting
> smaller, and eventually get blocked. The pool dealer down the road has a
> fountain out front, and dumps blue dye in the water each fall when it
> starts getting cold. After a couple weeks, he has a huge ice sculpture,
> and no more running water. Even if you can keep the outlet and exposed
> pipe from freezing solid and splitting, the water WILL stop flowing at
> some point, and your yard will be a mass of ice.
>
> Just out of curiosity, what are you trying to do with the water? And
> what is the heat exchanger for? Ground water is going to be at the same
> temp as the below-frostline dirt in the first place, isn't it? Or do you
> have a hot spring under your house?
>
> aem sends, curiously....
Thanks.
We're using well water in an open loop geothermal installation. Water
goes through a heat exchanger which transfers it to fluid circulating
through radiant tubing. Will also heat domestic water with the same.
Once heat is extracted from well water, it has nowhere to go than into
the pond.
I know, I know, it seems incredible to extract heat from something cold,
but it does work. I once had a heat pump water heater and it did just
that. It took ambient air temperature, extracted the heat and
transferred the heat to the water. The downside of this system was it
also chilled the basement air. On the other hand, in summer it cooled
the basement as well as dehumidified.
Geothermal is the way to go for heat.
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