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Forum: Geothermal & Heat Pumps

11-30-15, 08:34 AM

Replies: 1,943

The Homemade Heat Pump Manifesto

Views: 4,675,366

Posted By superlen

FYI, Here's what led me to this. The...

FYI,

Here's what led me to this.

The thermal conductivity of PE(X) is approximately 0.41-0.46 W/(m K), copper is a whopping 28. (no surprise)

And here is a table I found that is...

Forum: Geothermal & Heat Pumps

11-25-15, 08:53 PM

Replies: 1,943

The Homemade Heat Pump Manifesto

Views: 4,675,366

Posted By superlen

AC, Thanks a ton for those two pics. I noted...

AC,

Thanks a ton for those two pics. I noted much earlier in this thread the discussions on the "turbulent sweet spot" & tabled it as I didn't quite wrap my brain about how one could get a little...

Forum: Geothermal & Heat Pumps

11-25-15, 06:18 PM

Replies: 1,943

The Homemade Heat Pump Manifesto

Views: 4,675,366

Posted By superlen

Hold on Steve.. Don't drag me into this. I...

Hold on Steve.. Don't drag me into this.

I think my horizontal loops ARE turbulent. According to the online calculator I used, my 3/4" 3gpm are highly turbulent. I'm all ears if there is evidence...

Forum: Geothermal & Heat Pumps

11-21-15, 12:33 PM

Replies: 218

DX Geothermal Pond 4 ton Heat Pump

Views: 116,545

Posted By superlen

I took some pics last weekend and I'll get them...

I took some pics last weekend and I'll get them uploaded, hopefully today. (Having some phone usb issues).

In the meantime here are some approx sizes. This is an older single wall coaxial that was...

Forum: Geothermal & Heat Pumps

11-20-15, 11:54 AM

Replies: 218

DX Geothermal Pond 4 ton Heat Pump

Views: 116,545

Posted By superlen

Memphis, I have a packless 5T coaxial. I can...

Memphis,

I have a packless 5T coaxial. I can measure for you this weekend if you like, but I'm guessing it's probably 20' if unrolled. My suggestion is go as big as you can....monster size if...

Forum: Geothermal & Heat Pumps

11-19-15, 11:29 AM

Replies: 18

Expansion valves vs capillary tubing?

Views: 12,613

Posted By superlen

Since I stumbled onto your thread first (Edit...

Since I stumbled onto your thread first (Edit errr second. :) - Tech posted in while I was typing), I'll post my thoughts on this. Warning, I'm not a refrigeration guru by any means, but I have done...

Forum: Geothermal & Heat Pumps

11-05-15, 08:33 PM

Replies: 24

Loop sizing question

Views: 12,863

Posted By superlen

Well, you at least know the pump is working and...

Well, you at least know the pump is working and trying to circulate water. You need to ensure that all the air is out of the loop so that the pump doesn't hit an air bubble and stop pumping.

Showing results 1 to 7 of 7

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