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Old 06-20-2010, 12:20 PM   #1
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A idea about geothermal heating & cooling


When I was thinking about heating & cooling options, I allowed my mind to wonder a little bit and came up with a some what crazy or may be laughable idea. What if I dig a well in the ground, pump up underground water and pour it over the outdoor unit of a heat pump. It's sort of like converting an air source heat pump into an open loop ground source one.

I'm think that this won't work, since nobody is doing this. But I'm kind of curious why it doesn't. May be low efficiency of heat exchange?

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Old 06-20-2010, 12:28 PM   #2
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Right after I post this, I realized a serious problem with this design. Without any insulation and covering, the underground water will quickly cool down though heat exchange with environmental and evaporation. I guess that kills the efficiency.

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Old 06-20-2010, 01:09 PM   #3
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Not to mention that even at only 1.5 gallons per minute. The frozen ground in the winter won't be able to drain the water away. And would flood a large area. And turn it into an iceberg.
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Old 06-20-2010, 01:12 PM   #4
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Not a problem..... ring it and let it be an ice skating rink! Charge by the hour!

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Old 06-20-2010, 01:16 PM   #5
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Hey. Put hand holds in it, and then rent time on it.


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Old 06-20-2010, 01:17 PM   #6
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Yes. That's a problem. So it may work better in the summer. Evaporation will be on our side. I live in the south so I forgot about the icing problem.
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Old 06-20-2010, 01:18 PM   #7
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and what a waste of water
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Old 06-20-2010, 01:22 PM   #8
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Yes. That's a problem. So it may work better in the summer. Evaporation will be on our side. I live in the south so I forgot about the icing problem.
How muddy of a yard do you want?

Does your crawlspace/basement eve get water in it, after several days of rain?

It probably will after the ground is soaked by the well water.

The water will probably have a fairly good mineral content. And will leave corrosion build up on the unit. And then insulate the coil from the water.
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Old 06-20-2010, 01:30 PM   #9
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Let it turn into a huge iceberg then, use it to cool in the summer as it melts!

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Old 06-20-2010, 01:33 PM   #10
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We mostly have slab here.

Actually, I think you may not be able to pump that much groundwater from a well. Because if else, I cannot see why people don't use groundwater on their lawn. Or is it simply because it's to expensive to dig a well and run the pump?


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How muddy of a yard do you want?

Does your crawlspace/basement eve get water in it, after several days of rain?

It probably will after the ground is soaked by the well water.

The water will probably have a fairly good mineral content. And will leave corrosion build up on the unit. And then insulate the coil from the water.
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Old 06-20-2010, 01:33 PM   #11
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Thanks a lot for the pic in post 5 BT, my kid saw it and now he wants one..... and a pool to put it in....

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Old 06-20-2010, 02:50 PM   #12
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Thanks a lot for the pic in post 5 BT, my kid saw it and now he wants one..... and a pool to put it in....

DM

LOL... You and him are both welcome.

Post video of him having fun.
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Old 06-20-2010, 02:50 PM   #13
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We mostly have slab here.

Actually, I think you may not be able to pump that much groundwater from a well. Because if else, I cannot see why people don't use groundwater on their lawn. Or is it simply because it's to expensive to dig a well and run the pump?
Its not allowed in many areas.
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Old 08-13-2010, 12:59 PM   #14
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I think it's allowed in my area.

Is it possible at all to convert a air source heat pump to an open loop ground source one? I mean remodeling the outdoor unit so that instead groundwater is used to cooling/heating the coil instead of air?



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Its not allowed in many areas.
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Old 08-13-2010, 03:11 PM   #15
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You'd need to buy the coaxial condenser for it. Do a lot of trial and error.

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