Forum: Geothermal & Heat Pumps
01-08-20, 12:58 PM
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Replies: 8
Views: 6,359
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Forum: Geothermal & Heat Pumps
11-20-19, 12:05 PM
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Replies: 5
Views: 8,893
While R290 operates in the same neighborhood as...
While R290 operates in the same neighborhood as R22, it doesn't even come close to r410s requirements. 410 runs at nearly twice the pressure with a different mass flow rate. If you installed r290,...
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Forum: Conservation
08-14-17, 11:31 AM
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Replies: 16
Views: 12,787
The liquid line temperature reading is very...
The liquid line temperature reading is very concerning. Follow the liquid line back up into the condenser and find out where the restrictions starts. Various brands are using liquid line driers...
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Forum: Conservation
08-09-17, 11:45 AM
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Replies: 16
Views: 12,787
I was simply using 134 as a example on...
I was simply using 134 as a example on retrofitting 410 compressors. Pressures aside, mass flow rates of 134 and 22 should be somewhere in the same neighborhood, unlike 410a. There's no possible...
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Forum: Conservation
08-08-17, 08:27 PM
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Replies: 16
Views: 12,787
I intentionally had a project that used a R410...
I intentionally had a project that used a R410 compressor running R134 due to special circumstances. If I am recalling correctly, a 12kbtu compressor downrated to about 8500btu using the other gas. ...
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Forum: Conservation
02-26-17, 10:56 PM
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Replies: 25
Views: 16,017
Curious where you go with this project. I was...
Curious where you go with this project. I was down this same road about 7-8 months ago. I havnt abandoned the project, I just figured out a better way to do it and havnt had the time to start over...
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Forum: Geothermal & Heat Pumps
07-02-16, 12:42 PM
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Replies: 41
Views: 38,613
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Forum: Geothermal & Heat Pumps
07-02-16, 12:14 PM
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Replies: 4
Views: 11,676
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Forum: Geothermal & Heat Pumps
06-19-16, 08:11 PM
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Replies: 4
Views: 11,676
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Forum: Geothermal & Heat Pumps
06-19-16, 09:50 AM
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Replies: 4
Views: 11,676
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Forum: Geothermal & Heat Pumps
06-18-16, 03:39 PM
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Replies: 4
Views: 11,676
DIY Active HRV (Image Intensive)
Started up another spur of the moment project, and got quite a bit of progress done before the rain showed up (The then better half talked me into a house without a garage...). To make a long story...
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Forum: Geothermal & Heat Pumps
06-15-16, 07:12 PM
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Replies: 61
Views: 33,750
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Forum: Geothermal & Heat Pumps
06-14-16, 07:36 PM
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Replies: 61
Views: 33,750
Must say that these results look really good! ...
Must say that these results look really good! The first run is almost perfect with the exception of the motor using so much power. The second run, the airflow looks like it might be a little low,...
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Forum: Geothermal & Heat Pumps
06-14-16, 06:10 AM
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Replies: 61
Views: 33,750
I need to respectfully disagree with the first...
I need to respectfully disagree with the first step. Slowing the fan will cause more of the gas to stay in the evap further starving the condenser. The condenser is already so close to starved that...
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Forum: Geothermal & Heat Pumps
06-13-16, 08:34 PM
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Replies: 61
Views: 33,750
That paints a much clearer picture of what's...
That paints a much clearer picture of what's going on. It's without doubt undercharged, the calculated SC at the 30min mark is 17*F where you have 4-5*. I would bring up the SC and re-evaluate the...
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Forum: Geothermal & Heat Pumps
06-12-16, 11:12 PM
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Replies: 61
Views: 33,750
Dont forget that the cycle is dependent on ALL...
Dont forget that the cycle is dependent on ALL variables. While your evap will probably remain fairly stable, you will still have seasonal differences with temperature and humidity. You are also...
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Forum: Geothermal & Heat Pumps
06-08-16, 09:12 PM
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Replies: 61
Views: 33,750
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Forum: Geothermal & Heat Pumps
06-08-16, 01:02 PM
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Replies: 61
Views: 33,750
You do have a valid point about having the high...
You do have a valid point about having the high superheat, but that only applies when it's in a refrigeration situation. Having 30-plus degrees of superheat when your evaporator temperature is 60 can...
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Forum: Geothermal & Heat Pumps
06-08-16, 09:36 AM
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Replies: 61
Views: 33,750
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Forum: Geothermal & Heat Pumps
06-07-16, 09:39 PM
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Replies: 61
Views: 33,750
Fun little mini hpwh project. I'm curious, are...
Fun little mini hpwh project. I'm curious, are you charging gas and adjusting the captube with superheat/subcooling in mind, or just kinda winging it to see what works? Given you have a excellent...
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Forum: Geothermal & Heat Pumps
01-20-15, 09:59 PM
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Replies: 34
Views: 38,312
(There are 2 pictures here. If none/one loads,...
(There are 2 pictures here. If none/one loads, refresh. My servers slow lol)
This isnt from this specific model (it had a smaller version of this), but relevant for heatpumps/coil discussion. ...
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Forum: Geothermal & Heat Pumps
01-20-15, 09:30 PM
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Replies: 34
Views: 38,312
(There are 2 pictures here. If none/one loads,...
(There are 2 pictures here. If none/one loads, refresh. My servers slow lol)
AC, the design changes I think affected me mostly because of my use of TXV which was sensing a colder vapor line on the...
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Forum: Geothermal & Heat Pumps
01-19-15, 10:58 PM
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Replies: 34
Views: 38,312
Not to take bloody forever to finish a project,...
Not to take bloody forever to finish a project, but things have once again occurred in development. Discovered that the evaporator between a heatpump and straight cool model differed. The heatpump...
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Forum: Geothermal & Heat Pumps
11-16-14, 08:32 AM
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Replies: 331
Views: 176,830
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Forum: Geothermal & Heat Pumps
11-15-14, 11:07 PM
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Replies: 331
Views: 176,830
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