Quote:
Originally Posted by S-F
There is no difference is the total amount of vertical distance the water has to travel. It makes absolutely no difference as far as load on the pump is concerned. The only thing you have to loose with more shallow wells is efficiency of the loop, as I mentioned earlier.
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and yeah, what he said. You aren't pumping water up from the bottom a 200' hole, you are just circulating a close loop and the changes in potential energy all cancel each other out so your only head requirement is the resistance of the total length and all the fittings/valves/whatnot you have in the loop.
More holes means more pipe. I need 200' of hole under 10'. If I do one 210' hole I use 420' of pipe. If I do five 50' holes, i use 500' of pipe for about the same heat transfer ability.