06-20-12, 01:25 PM | #111 |
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Duplicate post please nuke...
-AC
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I'm not an HVAC technician. In fact, I'm barely even a hacker... Last edited by AC_Hacker; 06-20-12 at 01:27 PM.. |
06-20-12, 02:07 PM | #112 |
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How important is it to monitor the flow/temp. of each borehole? I like the idea of the manifold in one location and the ability to isolate a problem section. Also it would be cheaper to run more hdpe pipe instead of digging up the yard.
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06-20-12, 03:55 PM | #113 | ||
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Quote:
Being able to isolate each bore hole would be highly useful for purging, and a smaller pump could be used in that case. Quote:
As I understand it, most GSHPs were set up with a welded manifold box outside. I think the manifold/home-run idea is pretty new in the GSHP world, but it's common in the radiant floor world. -AC
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06-23-12, 02:58 AM | #114 | |
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Quote:
I found it: http://www.hydro-temp.com/help/drawi...nual%208.4.pdf It is 2ft/sec First I was thinking 2ft/sec is just too much flow I don't need that much. But after I paid more attention and found "purge" word in your post. I will use my propane powered gas water/mud pump for purging. It will create the hurricane in the loop Last edited by Vlad; 06-23-12 at 02:08 PM.. |
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06-23-12, 03:41 AM | #115 | ||
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Quote:
X====X====X== X====X====X== X====X====X== X====X====X== X====X====X== 3 holes in series and 5 parallel loops. 5 parallel loops are in return reverse pattern. Each loop is 3/4" IPS HDPE DR 11 pipe. The loop length will be approximately 400' each (3 holes section) Headers are 1 1/4 IPS HDPE DR11 pipe All pipes are socket welded. Quote:
HDPE pipe is very robust. I can't even imagine what can damage it, especially when it all buried in cement grout. If you have all loops the same length and all connected in return reverse pattern they will all have the same water flow and temperature. If you have 15 holes it is almost impossible to bring all pipes into one point and have all loops the same length. The same pattern is used for ice rinks and there is very critical to have the same temperature. You do need manifold in your house because this is how you can set up different temperature in different parts of your house. Last edited by Vlad; 06-23-12 at 03:51 AM.. |
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06-23-12, 02:13 PM | #116 |
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Now I am thinking about loop capacity. My guess it is about 4 ton. But I might be wrong. Just too many variables to estimate loop capacity. If somebody have better idea please correct me.
Also I plan to use loop water for different units. At the beginning I was thinking about putting one large pump for outside loop. But now I am thinking about terminating 1 1/4" headers in some kind of manifolds. The manifolds will be in my crawlspace. From this manifolds (supply and return) I can direct water to units I need. Units will be all different capacity. I think to put smaller pumps for each unit (may be just buy one size 3 speed pumps). Every unit will control its pump (compressor delay start, pump delay stop etc). Also I will need to add check valves or just get pumps with built-in check valve. At this moment I think I will need: 1. 9k BTU unit for air heating/cooling(mostly heating). This unit will run most of the time. 2. 12K BTU unit AC only. It will be used occasionally for extra AC capacity. 3. Also I want to add unit for domestic water heating. My guess is 24K BTU. This unit will run 6-8 hours a day. I think this arrangement is the easiest way to control loop flow and make pumping the most efficient. What do you think about this ????? Last edited by Vlad; 06-23-12 at 02:44 PM.. |
06-25-12, 06:32 PM | #117 |
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V,
In Manifesto, I outlined a proceedure to test loop capacity. This is same proceedure big guys use. If more questions, write. Sorry... bad connection, am on sailboat. Best, -AC
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07-20-12, 05:37 PM | #118 |
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Hey Guys, I have built a similiar drill rig to that of Vlad. First day went well, 1ft/hr through limestone now @ 11ft. 7mud / 4rock. Will post updates. Hydralic motor & gas trash pump.
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07-21-12, 05:57 PM | #119 |
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Can you please post more info? Power, water swivel, hydraulics, drill bit etc... and pictures
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07-21-12, 06:01 PM | #120 |
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My drilling was finished about 1.5 month ago but weather was holding me back. Last week I rented excavator to dig trenches. So now all my vertical loops connected together, pressure tested and I started burying process. Few more days and my ground loop will be done
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