Quote:
Originally Posted by pachai
Attach an end to a pipe and pull ( gently).
(Lubricate - with water?) Actually, push the
pipe down while guiding it with the pull string.
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I think it would be a good idea to get your hands on some HDPE, if that is what you want to use, so that you can understand the nature if it's flexibility, and also the minimum bending radius before it begins to collapse.
Quote:
Originally Posted by pachai
The Advantage to this is, I can have a vertical bore
with no weld. I hate to harp on this, but I TRIED to learn to weld to make battery racks, until my friend
described the metallurgic drawbacks of welding. Drilling and bolting makes fewer stress points.
And requires fewer skills.
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Sorry to hear that you had bad experiences welding. I did too. Welding HDPE is much, much easier. I hope you saw the part of the blog where I show how I made a HDPE fusion welding device for less than $10.
If you knew how easy, fast, cheap, strong and long-lasting HDPE welding was, you just might change your approach to this project.
Quote:
Originally Posted by pachai
Another thought...
We originally thought to have a U tube in the hole.
Now we have an "l" in the tube.
Maybe we could have an || ?
Two parallel loops in passing through
the same PAIR of bore holes.
The question is, should water in the pipe
flow the same direction in both,
or perhaps they should be in opposite directions - one will
be transferring the most heat in the top of the hole
and the other in the bottom? (or, in my design,
one is doing more in hole A and the other in hole B)
My reasoning with two loops passing through each
pair of boreholes is to not forfeit the linear footage.
The above question of flow direction highlights the
thought I had that each pipe should be labelled
on each end that will emerge into the basement..
but even labelled IN and OUT so that you know.
Also label your diagram to match, so that if a
leak is detected at the manifold, you can
refer to the diagram to see just what to dig up.
Hope this help spark more thought on this...
Seth
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The Ground Source Heat Pump manual I refered to elsewhere goes into some detail regarding having more than one "U" in a hole. There is a gain, but it is smaller than you might wish, something on the order of 7% gain.
When you consider the difficulty of installation, it might be easier and cheaper to just dig another hole, and install more pipe.
If you are really space challenged, then gaining the extra % could be worth it.
There may be a different site for this kind of work in the future. Do you wish to be notified when it comes on-line?
-AC_Hacker