Author Topic: Greenhouse with Subterranean Heating and Cooling System (SHCS)  (Read 2126 times)

Offline Peck

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My first post-Whee!  Hi everyone-

Just found the podcast and the forum.  Coincidentally, I am in the early phases of building "the homestead" on 5 acres in Central Wisconsin.  Got a portion of the property cleared, drove a well, put up a pole barn, etc.  The new tractor gets delivered tomorrow.  I'm very excited.  I'll start posting pictures soon. 

My next project was going to be a greenhouse.  Found some designs that I think would work in a northern climate.  I was not planning on a year round greenhouse, but I was hoping to extend the growing season considerably.  Anyway, I stumbled across a website that describes a heating and cooling system using a subterranean thermal mass rather than barrels of water or rocks above ground.

Here's a link-

http://www.sunnyjohn.com/indexpages/shcs.htm

Here's another one with a lot of info, but not very well organized-

http://www.roperld.com/science/solargreenhouses.htm

Finally, here are some YouTube videos-

http://www.youtube.com/view_play_list?p=672EC08E98ABA0FD

I am really intrigued by this as it uses a minimal amount of energy to run.  I don't know if it will let me grow plants year round without supplemental heating (which I don't want to have to use), but if it works, I might be able to come pretty close.  Anyone ever seen something like this?  Any thoughts?


Offline Peck

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Re: Greenhouse with Subterranean Heating and Cooling System (SHCS)
« Reply #1 on: July 23, 2009, 02:29:26 PM »
Oops, I didn't see it before, but I just found this thread on the same subject. 

http://thesurvivalpodcast.com/forum/index.php?topic=3407.0

Sorry.   :-[

Offline JustGreg

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Re: Greenhouse with Subterranean Heating and Cooling System (SHCS)
« Reply #2 on: July 23, 2009, 03:33:17 PM »
If the system is air-to-air, make a provision in the underground tubing that it slope all one way, to drains, and p-traps, and a catch basin with a trash pump.  I know someone who built a test "house" (300 sq ft shed) with 4" PVC type system underground, the "house" was black with mold in one summer.

If the system is air-to-water-to-air, then the radiator/exchanger in the dwelling needs to be in a pan with drainage.

In the dry parts of the world that is not much of a problem, or, doesn't manifest itself when 90% of your house is mud brick.

G.