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Geothermal hypothetical question: cooling pool water
Posted on 7/3/14 at 12:00 pm
Posted on 7/3/14 at 12:00 pm
If you have a shallow body of water (typical 25,000G swimming pool), could you use the earth to naturally cool the water?
In other words, could you do closed-loop geothermal and just run a pipe 200-400' down and circulate the water through it?
I know they make chillers for this purpose, but this idea came to me, IDK if it would work.
In other words, could you do closed-loop geothermal and just run a pipe 200-400' down and circulate the water through it?
I know they make chillers for this purpose, but this idea came to me, IDK if it would work.
10
Posted on 7/3/14 at 12:01 pm to VetteGuy
Yep. It would work well.
Eta: that's how some people cool their houses.
Eta: that's how some people cool their houses.
This post was edited on 7/3/14 at 12:02 pm
Posted on 7/3/14 at 12:02 pm to VetteGuy
Oui
Posted on 7/3/14 at 12:02 pm to VetteGuy
It should work quite well. You could also pipe the water through a Yeti.
Posted on 7/3/14 at 12:03 pm to DownshiftAndFloorIt
I kinda think it would, too.
Run the 95degree water down into 78 degree earth, maybe come out with 85?
Just would need a pump, or use the pool's existing pump.
Run the 95degree water down into 78 degree earth, maybe come out with 85?
Just would need a pump, or use the pool's existing pump.
Posted on 7/3/14 at 12:04 pm to ZacAttack
Posted on 7/3/14 at 12:06 pm to DownshiftAndFloorIt
I looked hard at geothermal for the house, but honestly, it was more trouble than it was worth. I would have needed like 8 wells.
Open loop is cake, though.
Open loop is cake, though.
Posted on 7/3/14 at 12:09 pm to VetteGuy
Just figure out how much pipe you're going to run and call the pump manufacturer and find out if it can handle it.
Posted on 7/3/14 at 12:12 pm to DownshiftAndFloorIt
Yeah, I gotta do some calculating.
How long would it take to circulate the water through it?
Would the extra energy cost be worth it?
How close would the pipe have to be to the water source?
I'm only looking to get an 7-9 degree differential.
How long would it take to circulate the water through it?
Would the extra energy cost be worth it?
How close would the pipe have to be to the water source?
I'm only looking to get an 7-9 degree differential.
Posted on 7/3/14 at 12:14 pm to VetteGuy
Well if your pump is running anyway than it shouldn't cost much of anything to operate. I'm not familiar with how you go about putting in the pipe loops or how much it costs.
A 10 degree differential should be easy.
A 10 degree differential should be easy.
Posted on 7/3/14 at 12:14 pm to VetteGuy
quote:
200-400' down and circulate the water through it?
I would imagine this would be costly...
Posted on 7/3/14 at 12:15 pm to VetteGuy
frick that, throw your yeti in the pool.
Posted on 7/3/14 at 12:16 pm to VetteGuy
quote:I really don't think it has to be that deep.
run a pipe 200-400' down
Posted on 7/3/14 at 12:20 pm to OldSouth
Yep, only like 200-250'. I can't remember for sure.
I need an engineer to run the numbers so I don't end with something that may work, but at 3x the cost.
I need an engineer to run the numbers so I don't end with something that may work, but at 3x the cost.
Posted on 7/3/14 at 12:22 pm to VernonPLSUfan
The whole pool would ice up!
Posted on 7/3/14 at 12:25 pm to VetteGuy
Figure out how big your pool is, take a temp reading of the water on a hot shitty day, and post it. Somebody is bored enough at work to figure all that out.
Posted on 7/3/14 at 12:29 pm to DownshiftAndFloorIt
About 25,500. Air is 95, water is 92.
It will go up some by this afternoon.
It will go up some by this afternoon.
Posted on 7/3/14 at 12:29 pm to VetteGuy
200' deep seems excessive... You are going to need a pump with some arse behind it to overcome that head pressure.
Probably be better off buying a heat exchanger and running your pool water through a cooler.
Other cheaper solutions are to get the lightest color liner made, plant some shade trees. Circulate water more often.
Probably be better off buying a heat exchanger and running your pool water through a cooler.
Other cheaper solutions are to get the lightest color liner made, plant some shade trees. Circulate water more often.
Posted on 7/3/14 at 12:33 pm to VetteGuy
pool chiller
I know you said you were aware of chillers made for this purpose. Just wanted to say I've got one of these - they work great and are relatively inexpensive.
I know you said you were aware of chillers made for this purpose. Just wanted to say I've got one of these - they work great and are relatively inexpensive.
Posted on 7/3/14 at 12:37 pm to rlp
Yeah, that's the one I was looking at.
I figure about $3500-3800 installed.
I figure about $3500-3800 installed.
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