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Posts Made By:
dhaslam
Forum:
Geothermal & Heat Pumps
03-14-14, 12:29 PM
Replies:
293
Help design my new system please
Views:
108,236
Posted By
dhaslam
It looks like 2 x parallel loops of 250' of 3/4"...
It looks like 2 x parallel loops of 250' of 3/4" pex,
with flow of 3.65 gpm in each loop
at Delta T of 20* F , (tank vs. water inside pex)
should transfer about 15 Tons of heat = 180K btus
At...
Forum:
Geothermal & Heat Pumps
03-13-14, 03:52 PM
Replies:
293
Help design my new system please
Views:
108,236
Posted By
dhaslam
That doesn't sound right. I use a calculation of...
That doesn't sound right. I use a calculation of about 6 watts per metre which would be about 7 watts per foot pipe run. I have 1/2 mile of pipe for a 2500 sq' bungalow. Of course being...
Forum:
Geothermal & Heat Pumps
03-13-14, 09:44 AM
Replies:
293
Help design my new system please
Views:
108,236
Posted By
dhaslam
If the input water is hot enough it should be...
If the input water is hot enough it should be diverted into the heating circuit and bypass the heat pump. At intermediate temperatures the input temperature can be regulated by mixing the...
Forum:
Geothermal & Heat Pumps
03-08-14, 01:18 PM
Replies:
293
Help design my new system please
Views:
108,236
Posted By
dhaslam
The usual input temperature limit for a GSHP is...
The usual input temperature limit for a GSHP is 20C/68F The one I have only allows 15C maximum. The problem is that the compressor can overheat, it needs the cool water input to keep it...
Forum:
Geothermal & Heat Pumps
03-07-14, 07:14 PM
Replies:
293
Help design my new system please
Views:
108,236
Posted By
dhaslam
Yes I understand about the problem of...
Yes I understand about the problem of overheating the soil underneath the house. Overheating isn't so much of an issue here because we are about 15 degrees farther north so the sun isn't so hot...
Forum:
Geothermal & Heat Pumps
03-07-14, 12:25 PM
Replies:
293
Help design my new system please
Views:
108,236
Posted By
dhaslam
The mound is round and about eight metres...
The mound is round and about eight metres across. Originally the heating source was to be hot air supplied by home made coroplast collectors so there were large land drainage pipes for...
Forum:
Geothermal & Heat Pumps
03-07-14, 10:46 AM
Replies:
293
Help design my new system please
Views:
108,236
Posted By
dhaslam
I had a fairly similar situation in Ireland. The...
I had a fairly similar situation in Ireland. The ground is layered limestone rock and not practical for a ground loop. After some experimentation I have ended up with an overground heat store ...
Showing results 1 to 7 of 7
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