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Search: Posts Made By: mejunkhound
Forum: Geothermal & Heat Pumps 10-06-18, 09:01 AM
Replies: 1,943
Views: 3,656,026
Posted By mejunkhound
made a tube in tube water to R22 exchanger ...

made a tube in tube water to R22 exchanger

36mm inside diameter PVC plastic pipe carries water

Inside the PVC pipe have 18 mm diameter coper pipe with R22 inside.

25 meters length = ...
Forum: Geothermal & Heat Pumps 05-29-18, 11:38 PM
Replies: 1,943
Views: 3,656,026
Posted By mejunkhound
epoxy path dont hold to pressur heat and...

epoxy path dont hold to pressur heat and chemicals

wow, if you find and epoxy that will hold 410 apllied on external surfaces. let us in on the details of the type AND specific application...
Forum: Geothermal & Heat Pumps 07-20-16, 01:31 PM
Replies: 1,943
Views: 3,656,026
Posted By mejunkhound
Need to do the math, I guess. Own approach...

Need to do the math, I guess.

Own approach is to do the math first.
Bone up on yu enthalpy charts and Mollier diagram equations.

COP of 5 to 6 is easily doable for a small system if your...
Forum: Geothermal & Heat Pumps 10-26-15, 06:42 AM
Replies: 1,943
Views: 3,656,026
Posted By mejunkhound
'how do you know' re: pipe slope and oil ...

'how do you know'

re: pipe slope and oil

43 years ago built first diy HP from 1968 Chrysler AC which was a 2 cylinder recip compressor. Drove it with a 5HP 184T frame motor (real 5 HP). ...
Forum: Geothermal & Heat Pumps 01-05-15, 09:08 AM
Replies: 1,943
Views: 3,656,026
Posted By mejunkhound
quick math: 7e6/4700 = 1489 gal/day per ton ...

quick math:

7e6/4700 = 1489 gal/day per ton

= 62 gal per hour

= about 515 # per hour; or 515 BTU per hour per deg F

Say incoming aquifer water is 60F, out = 35F (to avoid freezing...
Forum: Geothermal & Heat Pumps 01-04-15, 08:07 PM
Replies: 1,943
Views: 3,656,026
Posted By mejunkhound
diy cable tool

Couple of notes on cable tool drilling.

1st try was 45 years ago for drinking water - simple capstan and 200# bit with manila rope.
Got down about 10 ft and hit a basalt boulder - dead stop,...
Forum: Geothermal & Heat Pumps 09-06-13, 07:38 AM
Replies: 1,943
Views: 3,656,026
Posted By mejunkhound
Grin: I think you misread, and actually agree. ...

Grin:
I think you misread, and actually agree.

re: $6K is about 10X what most of the folks here are willing to spend for a full system I was implying that most folks here think a system can be...
Forum: Geothermal & Heat Pumps 09-05-13, 06:06 PM
Replies: 1,943
Views: 3,656,026
Posted By mejunkhound
yeah, and $6K is about 10X what most of the folks...

yeah, and $6K is about 10X what most of the folks here are willing to spend for a full system.

BTW: DIY cost do not include time - near infinite, classed as 'recreation' - nor does it include...
Forum: Geothermal & Heat Pumps 08-30-13, 09:41 PM
Replies: 1,943
Views: 3,656,026
Posted By mejunkhound
graphic COP vs. vent air temp and outside air...

graphic COP vs. vent air temp and outside air temp (or ground temp minu 5-10F)
Forum: Geothermal & Heat Pumps 06-06-13, 07:24 AM
Replies: 1,943
Views: 3,656,026
Posted By mejunkhound
good post, but would make one clarification due...

good post, but would make one clarification due to the wording of :
"any induction motor such as a squirrel cage or shaded pole will be spark free"

shaded pole induction motors ARE spark free,...
Forum: Geothermal & Heat Pumps 09-18-11, 10:21 PM
Replies: 1,943
Views: 3,656,026
Posted By mejunkhound
re: It went to 15 ft. and then hit a pocket...

re:
It went to 15 ft. and then hit a pocket of what must be small rock as it gets stuck there

I see that G NR G is in the Seattle area. Have drilled a couple of wells east of Renton and am...
Forum: Geothermal & Heat Pumps 04-26-11, 08:29 AM
Replies: 1,943
Views: 3,656,026
Posted By mejunkhound
Good posts Blauhng, keep'em coming.. great...

Good posts Blauhng, keep'em coming.. great overview for folks here.
Forum: Geothermal & Heat Pumps 04-06-11, 08:38 AM
Replies: 1,943
Views: 3,656,026
Posted By mejunkhound
This site looks like a good site to start a...

This site looks like a good site to start a separate thread when I have time (may not be till I retire later this year)

Think there is a pix attached if attachment tool worked,
LH is control...
Forum: Geothermal & Heat Pumps 04-05-11, 04:54 PM
Replies: 1,943
Views: 3,656,026
Posted By mejunkhound
Congratualtions on 100k hits! Neat thread....

Congratualtions on 100k hits!

Neat thread. My first time here.

Glad to see a nice group of folks not intimidated by the so-called pros, nor inundated by the 'ha-ha' type of know-nothings...
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