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geothermal heat and high tunnels

 
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fungi urban bee
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I'm looking at the possibility of a high tunnel. I've seen several youTube videos where people used buried irrigation pipe to bring up warmer air for the winter. However, most seem to be 4+ feet deep. If I went that route it would be about 2-2.5 feet until I hit clay (my stopping point). Does anyone see any benefit from shallow pipe? I don't see it but figured maybe someone else is in the same predicament.
 
pollinator
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Just curious....I've been digging to create water cisterns.....I love to dig in clay -why do you stop at clay?
 
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You need to get below the freeze depth to really do any good.
 
echo minarosa
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Orin Raichart wrote:Just curious....I've been digging to create water cisterns.....I love to dig in clay -why do you stop at clay?



For several reasons...I have limited ability to dig deep in this yard due to buried utilities of various kinds. Additionally, I stop at clay basically because I haven't seen a need to go deeper as I squeeze beds anywhere I can while avoiding utilities and not udermining fences, borders, sidewalks, etc. With a system like geo for a high tunnel, the footprint would rule out the digging due to conflict with utilities. If I go the high tunnel route, it would be 13.5x24' which is a sizeable chunk of my yard.
 
pollinator
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maybe this idea needs re-thinking.
What do you hope to get from the ground, in what volume and at what time of the year?

Oncethese parameters have beem specified, we can help with implementation.
 
echo minarosa
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Some heat for winter use. I don't think I can get enough from a shallow run of pipe though.
 
pollinator
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Echo, I've got two main questions that might have follow up questions later:
1.) what size is the high tunnel are you planning?
2.) what are the "utilities" that are giving you hesitation?
2.1) is there an easement that restricts what you might do in the space ? (I have 3 sewers, within 2 easements on our property, one is close to the house and our deck required a variance)
2.2) are you just uncomfortable digging near "utilities"?

and some thoughts:
CALL 811, before you dig! call811.com  They'll come and locate and flag the utility locations. Usually it is done within a few days to a week, it's pretty quick.

one could consider the earth-tubes as "another utility" and install along with the others.
the depth does make a difference.
 
John C Daley
pollinator
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In my experience, you will not get enough heat anyway. Particularly taking into account what is involved to build it.
Why not look at a wood heater or a waste oil conversion to a wood heater.
 
echo minarosa
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Kenneth Elwell wrote:Echo, I've got two main questions that might have follow up questions later:

1.) what size is the high tunnel are you planning?



13.5x24 gothic

2.) what are the "utilities" that are giving you hesitation?



gas, water, electric, sewer - some of which are far more shallow than they should be and unfortunately run about every 6-8' across the entire back yard. Makes bed planning dicey.

2.1) is there an easement that restricts what you might do in the space ? (I have 3 sewers, within 2 easements on our property, one is close to the house and our deck required a variance)



Nothing other than that described above. The yard is small.

2.2) are you just uncomfortable digging near "utilities"?



yes. Also, making the soil more loose adds to the danger of movement so I give them their space. Its an OLD property

and some thoughts:
CALL 811, before you dig! call811.com  They'll come and locate and flag the utility locations. Usually it is done within a few days to a week, it's pretty quick.



They will only do this from street to house hookup. They will not mark between the two structures. Have gone around and around with more than a dozen calls. they show up and then say they can only go to main house hookup.

one could consider the earth-tubes as "another utility" and install along with the others.
the depth does make a difference.



Yeah, at this point I'm thinking they aren't feasible given the restrictions here. Thsnks though.

gift
 
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