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Forum: Geothermal & Heat Pumps 02-18-15, 01:47 PM
Replies: 48
Views: 31,347
Posted By Mikesolar
Now to just get a program that will monitor...

Now to just get a program that will monitor subcooling and adjust the valve accordingly. It also has to open it a bit at start up till the temps settles.
Forum: Geothermal & Heat Pumps 02-18-15, 01:42 PM
Replies: 48
Views: 31,347
Posted By Mikesolar
Yes, I have one in my hands. A Sporlan SER-B

Yes, I have one in my hands. A Sporlan SER-B
Forum: Geothermal & Heat Pumps 02-18-15, 01:32 PM
Replies: 48
Views: 31,347
Posted By Mikesolar
There is a way to control a heat pump based...

There is a way to control a heat pump based solely on subcooled liquid temp. I would like to try to make the EEV measure the subcooled temp just before it goes to the evap. The control only has to...
Forum: Geothermal & Heat Pumps 02-18-15, 01:23 PM
Replies: 48
Views: 31,347
Posted By Mikesolar
Yup, and I know it is made for liquid injection...

Yup, and I know it is made for liquid injection purposes. I haven't seen any reference to it being used as a main EEV. It needs the solenoid to activate it and it is a normally closed valve like...
Forum: Geothermal & Heat Pumps 02-17-15, 08:29 PM
Replies: 48
Views: 31,347
Posted By Mikesolar
I'm not sure that it is a good valve for this...

I'm not sure that it is a good valve for this purpose. I have a Danfoss equiv (that came with a controller) that is used for liquid injection for cooling the pot if the head pressure gets too high...
Forum: Geothermal & Heat Pumps 02-17-15, 08:24 PM
Replies: 48
Views: 31,347
Posted By Mikesolar
This is the one I have with me now, the SER-B. ...

This is the one I have with me now, the SER-B.

I was looking into using some chinese ones like BradC was but haven't gotten around to it yet.
Forum: Geothermal & Heat Pumps 02-17-15, 06:42 PM
Replies: 48
Views: 31,347
Posted By Mikesolar
BBP, I am a programming luddite, haha. I...

BBP, I am a programming luddite, haha. I installed arduino and tried to hook up an UNO, downloaded a PID from the library and nothing worked. I have no real idea how to debug the system. Ohhh, give...
Forum: Geothermal & Heat Pumps 02-17-15, 06:33 PM
Replies: 48
Views: 31,347
Posted By Mikesolar
I've looked at a couple obscure pages (googled...

I've looked at a couple obscure pages (googled EEV PID) which seem to indicate that if there is a pressure sensor in the mix, the error in valve movement can be reduced by at least 50%. Note the...
Forum: Geothermal & Heat Pumps 02-17-15, 06:30 PM
Replies: 48
Views: 31,347
Posted By Mikesolar
I know all this Jeff, I do service the minisplits...

I know all this Jeff, I do service the minisplits as well as install them, and I have built a number of 2 to 5 ton units (ground and air) and have worked with a couple of larger manufacturers and...
Forum: Geothermal & Heat Pumps 02-16-15, 09:52 AM
Replies: 48
Views: 31,347
Posted By Mikesolar
here is a very interesting article about PID and...

here is a very interesting article about PID and using Pressure as well as temp
Forum: Geothermal & Heat Pumps 02-16-15, 09:03 AM
Replies: 48
Views: 31,347
Posted By Mikesolar
One thing to remember about subcooling as that...

One thing to remember about subcooling as that the action of the valve would be inverse to that of superheat. Where a normal TXV will open in response to a higher SH (bulb temp), the subcooling valve...
Forum: Geothermal & Heat Pumps 02-15-15, 07:39 AM
Replies: 48
Views: 31,347
Posted By Mikesolar
I wish i had the knowledge to write code but I...

I wish i had the knowledge to write code but I don't.... yet. I am a programming luddite so it is really hard for me.:D

BBP, could you write one with 1 thermister instead of the pressure sensor...
Forum: Geothermal & Heat Pumps 02-14-15, 05:21 PM
Replies: 48
Views: 31,347
Posted By Mikesolar
BBP, did you write all this? If so, I'm...

BBP, did you write all this? If so, I'm impressed:D

Now, could there be one written for subcooling which can control an EEV
Showing results 1 to 13 of 13

 
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