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Forum: Geothermal & Heat Pumps 11-15-16, 02:41 PM
Replies: 83
Views: 18,973
Posted By jeff5may
The easiest cheapest most reliable way to do a...

The easiest cheapest most reliable way to do a pump and dump system is drain to the surface. Any time you put water back into the ground, it could travel back to your source, robbing you of your heat...
Forum: Geothermal & Heat Pumps 11-13-16, 11:00 AM
Replies: 10
Views: 4,948
Posted By marx290
Building a 100 Year Refrigerator

Haven't been on the forum in some time; I have been busy. Began a project in June to construct a modular, long lasting refrigerator. It has gone through many iterations, and there are many more to...
Forum: Geothermal & Heat Pumps 09-26-16, 12:06 PM
Replies: 1,942
Views: 1,683,171
Posted By AC_Hacker
The Homemade Heat Pump Manifesto Has Passed a Million Page-Views

The Homemade Heat Pump Manifesto has just passed the one million page-views milestone!

Never in my wildest dreams did I think that there would be this much interest in converting discarded air...
Forum: Geothermal & Heat Pumps 11-23-15, 09:41 PM
Replies: 21
Views: 11,032
Posted By jeff5may
15000 BTU Window A/C heat pump conversion

OK, so I was at my buddy's house figuring out how to insulate his garage, and his neighbor needed help patching his leaking porch roof. While surveying the job site, I happened upon this stray unit...
Forum: Geothermal & Heat Pumps 07-27-15, 12:13 PM
Replies: 146
Views: 51,110
Posted By randen
5 Ton DIY GSHP Build

Summer has made it to Southwestern Ontario Canada. Outside temps reaching 34 Deg. C and humidity of 80%. Really nice for the beach or drinking beer under a tree.

Having some work in the shop not...
Forum: Geothermal & Heat Pumps 06-04-15, 10:36 PM
Replies: 220
Views: 55,392
Posted By BradC
Ok, I'm late to this party primarily because you...

Ok, I'm late to this party primarily because you guys are awake and at it while I'm asleep.

Don't use the TXV. Now here's why. The sole purpose of a TXV is to maximise the use of the evaporators...
Forum: Geothermal & Heat Pumps 06-04-15, 08:03 AM
Replies: 220
Views: 55,392
Posted By jeff5may
Yes, the engineers will tell you this can't work,...

Yes, the engineers will tell you this can't work, without all new everything. I tend to disagree. It all depends on how far you want to push your envelope.

A 5000 BTU compressor will move more...
Forum: Geothermal & Heat Pumps 06-04-15, 06:50 AM
Replies: 220
Views: 55,392
Posted By BradC
Look, the reality is that a refrigeration system...

Look, the reality is that a refrigeration system is a balance. A properly designed system will have a defined heat load on the evaporator, a condenser to suit and a compressor and cap tube to suit...
Forum: Geothermal & Heat Pumps 06-02-15, 09:56 PM
Replies: 220
Views: 55,392
Posted By jeff5may
The things you are describing sure not out of the...

The things you are describing sure not out of the ordinary for an r290 system. For one, the mineral oil and propane dissolve in each other like carbonated soft drink. The oil will follow a leak. The...
Forum: Geothermal & Heat Pumps 06-02-15, 02:15 PM
Replies: 220
Views: 55,392
Posted By jeff5may
With a cap tube metered system, you charge by...

With a cap tube metered system, you charge by superheat. At the muffler intake, you should always have 10 degF or more to ensure you are not flooding your evaporator. The other thing to watch is...
Forum: Geothermal & Heat Pumps 07-02-14, 03:12 PM
Replies: 331
Views: 86,776
Posted By AC_Hacker
Designing a General Purpose Heat Pump Controller

The Homemade Heat Pump concept has had some notable success.

However, one link in the chain that is missing is an open-source general-purpose heat pump controller.

If such a controller existed,...
Forum: Geothermal & Heat Pumps 02-04-14, 12:57 PM
Replies: 146
Views: 51,110
Posted By randen
5 Ton GSHP Build

Picked up some free insulation board and had the table saw set-up. An item that will be nessisary for the 5 Ton rebuild an insulation box for the heat exchangers. I fab'ed up some boxes that will...
Forum: Geothermal & Heat Pumps 02-15-13, 04:57 PM
Replies: 146
Views: 51,110
Posted By randen
5.0 Ton build

The new homemade GSHP is being tested for leaks both refrigerant and the water side for the heat exchangers. Everything looks good. The varible frequency drive is programmed for basic function. For...
Forum: Geothermal & Heat Pumps 02-10-13, 01:46 PM
Replies: 146
Views: 51,110
Posted By randen
AC Hacker You are correct That is the cheap...

AC Hacker
You are correct That is the cheap foam insulation. For the temps involved it should be just fine. But for exterior applications (solar) it would not do the suns exposure turns it to dust...
Forum: Geothermal & Heat Pumps 02-09-13, 09:58 PM
Replies: 146
Views: 51,110
Posted By randen
5 Ton GSHP Build

Most of the components have arrived and are being assembled. A few alterations have been nessisary. The height of the new compressor is about an inch taller and its having a bit of a snowball effect...
Forum: Geothermal & Heat Pumps 05-21-12, 10:31 AM
Replies: 31
Views: 22,367
Posted By Mobile Master Tech
Passive Annualized Heat Storage/Annualized Geo Solar-Don't Waste That Heat!

I have always been bothered by the fact that many alternative energy sources, especially solar thermal, have the least output when you need it most. Most solar and process heat recovery systems have...
Forum: Geothermal & Heat Pumps 12-08-11, 05:01 PM
Replies: 1,942
Views: 1,683,171
Posted By AC_Hacker
http://ecorenovator.org/forum/attachments/geotherm...

http://ecorenovator.org/forum/attachments/geothermal/1909d1323339140-homemade-heat-pump-manifesto-install2a.jpg

Thanks for this report...

Your results are very encouraging.

A little more...
Forum: Geothermal & Heat Pumps 12-08-11, 04:26 AM
Replies: 1,942
Views: 1,683,171
Posted By randen
The little homemade GSHP

I thought I would post the statis of the little 2Ton shop GSHP. Now that the night-time temps are dropping well below freezing -5 deg C(23F) the GSHP is running continually. The shop inside temps...
Forum: Geothermal & Heat Pumps 04-20-09, 05:15 PM
Replies: 1,942
Views: 1,683,171
Posted By AC_Hacker
Selecting A Likely Candidate For Building A Heat Pump

So if the thread is called "how to make a heat pump out of junk", I guess one of the first secrets is how to tell that the hardware you have is not really junk after all.

In this section, I'm...
Showing results 1 to 19 of 19

 
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