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Search: Posts Made By: Pegasus
Forum: Geothermal & Heat Pumps 10-21-15, 01:56 AM
Replies: 1,943
Views: 3,669,844
Posted By Pegasus
R-22 vs R-290

To be honest, when I released some propane from the low side it came out with some foamy oil !!! (it settled within a few seconds). If that' s the case then the solution would de a bigger evaporator?...
Forum: Geothermal & Heat Pumps 10-21-15, 01:45 AM
Replies: 1,943
Views: 3,669,844
Posted By Pegasus
R-22 vs R-290

No, I haven't measured the heat transfer yet, I plan to install a heat metering device in the next set-up. I am guessing though, I am not utilising all of the evaporator for two reasons :

a) On...
Forum: Geothermal & Heat Pumps 10-19-15, 08:23 AM
Replies: 1,943
Views: 3,669,844
Posted By Pegasus
GSHP Project back to life !!!

Hello to all,

After many setbacks I finally made it to built my "proof of concept" GSHP.
My main concern was the output of the GS HX Loop (~ 500m of pipe, divided in 6 circuits and buried at ~ 2m...
Forum: Geothermal & Heat Pumps 03-10-12, 08:12 AM
Replies: 1,943
Views: 3,669,844
Posted By Pegasus
More homework!

Thanks a lot. I will do my homework and report back !!!
Forum: Geothermal & Heat Pumps 03-09-12, 06:56 AM
Replies: 1,943
Views: 3,669,844
Posted By Pegasus
Devil's Advocate !!!

Why is then, that most of the commercial HP' s use a reversing valve.
Forum: Geothermal & Heat Pumps 03-08-12, 12:45 PM
Replies: 1,943
Views: 3,669,844
Posted By Pegasus
That's huge, therefore out of the question!!!...

That's huge, therefore out of the question!!! I'll stick to the plated HX.

But i am still puzzled for what is the best solution :

- Reverse the refrigerant flow with the existing Reversing...
Forum: Geothermal & Heat Pumps 03-07-12, 10:46 PM
Replies: 1,943
Views: 3,669,844
Posted By Pegasus
Ground Loop HX

I am really tempted to make a copper tube HX for the ground loop side, "drown" it in to a barrel and use a submerged pond circulation pump. For testing it i found on ebay a cheap China Made one with...
Forum: Geothermal & Heat Pumps 03-07-12, 10:34 PM
Replies: 1,943
Views: 3,669,844
Posted By Pegasus
Well, the rated input of all (to my knowing)...

Well, the rated input of all (to my knowing) electric appliances in Europe is 220-240VAC, 50-60Hz (1PH), my donor A/C included. 220V AC is the Greek Power Standard thats why i wrote it.
Forum: Geothermal & Heat Pumps 03-07-12, 04:01 PM
Replies: 1,943
Views: 3,669,844
Posted By Pegasus
Yes checked it twice. It seems to be the...

Yes checked it twice. It seems to be the standard for the low range split type A/C here. Very easy to integrate it to my existing controls.




I meant something like what BradC is suggesting...
Forum: Geothermal & Heat Pumps 03-01-12, 06:20 AM
Replies: 1,943
Views: 3,669,844
Posted By Pegasus
Firts step

I finally got hold of the compressor for the heat pump project :

Compressor (Model - Type) : YZG-39RCT1 - Rotary
Power rating (W) : 1300
Cooling capacity (W - BTU/h) : 3900...
Forum: Geothermal & Heat Pumps 02-22-12, 07:08 AM
Replies: 1,943
Views: 3,669,844
Posted By Pegasus
I will folow your lead.

Hello all, and many thanks for the manifesto (Read it all).
From what i can tell we share the same thinking regarding ecology, economy and DIY.

I have a well insulated home at Chania - Crete,...
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