4.30.19:
This is a second look at the geothermal earth tube. This time, an application to a greenhouse was demonstrated. He adds a composting set up to it for additional heating in the winter months. I wanted to see how well the system works in real setup.
Radon is mentioned as a problem. I hadn't thought of that. Also, weak soil may be an issue, as it would be on the land out west. Shows a "u" type system, which offers advantages and disadvantages.
The "u" type system doesn't increase radon, nor humidity, as the pic shows below:
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The second video shows the performance. It appears to me to be a disappointment. Only 10 degrees difference in the chamber ( not including the greenhouse! ). This is going to require many more holes and tubing in order to do a large volume. Such a system may help a "coffin" type arrangement, and the results would be modest. This taps down my enthusiasm for such a project.
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4.1.19:
by Morgan Brown
Here is a plan for constructing a 12 foot deep vertical geothermal earth tube. Why 12 feet deep? Here is a chart which shows the advantage quite clearly.
These videos are of interest because it appears simple, easy, and cheap. I like simple, easy, and cheap.
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| Little variation in temperatures from season to season when at 12 feet. The deeper it is, the variation there is. |
Below are the videos:
Part 1:
and
Part 2:
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