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Thread: R14 ... "with a bit of Argon"??
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13-09-2011, 03:46 AM #1
R14 ... "with a bit of Argon"??
Can someone explain to my why adding a tiny bit of argon, or some other refrigerant, helps the R14 loop? Is this some partial pressure trick, or is the other gas dissolving in the R14?
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13-09-2011, 04:06 AM #2
Re: R14 ... "with a bit of Argon"??
oil return
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13-09-2011, 04:07 AM #3
Re: R14 ... "with a bit of Argon"??
In the low stages of cascade systems, it is common to add a little something to help carry the oil. I haven't worked with R14, but would not be surprised if argon were the oil carrying additive used.
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13-09-2011, 04:08 AM #4
Re: R14 ... "with a bit of Argon"??
But I could be wrong
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13-09-2011, 04:28 AM #5
Re: R14 ... "with a bit of Argon"??
That makes sense. I've seen one guy add R1150 to the R14. I presume because R1150 is a hydrocarbon it is better at picking up the oil.
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13-09-2011, 04:43 AM #6
Re: R14 ... "with a bit of Argon"??
It is extremely important to have good oil separators... but it isn't enough.
Let's say your oil separator catches 99.9% of the oil. That means 0.1% gets through to the evaporator and turns the consistency of molasses due to the very low temperature. Given a long enough period of time ALL of the system oil will end up in the evaporator... 0.1% at a time.
An oil carrying additive is needed.
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13-09-2011, 05:31 AM #7
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13-09-2011, 06:43 AM #8
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13-09-2011, 09:30 PM #9
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14-09-2011, 12:53 AM #10
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14-09-2011, 01:49 AM #11
Re: R14 ... "with a bit of Argon"??
I've used R12, pentane, (instrument grade) propane. Have never heard of using argon, but there are lots of things I have never heard of.
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28-09-2011, 04:04 AM #12
Re: R14 ... "with a bit of Argon"??
That makes sense. I've seen one guy add R1150 to the R14. I presume because R1150 is a hydrocarbon it is better at picking up the oil.
_____________________Last edited by Josip; 30-09-2011 at 02:55 PM.
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03-10-2011, 09:59 PM #13
Re: R14 ... "with a bit of Argon"??
In talking with one of the manufacturers of ultra low autocascade products the argon is a "mover" as noted above. Ususally there is a thinner that is included in the blend specified and supplied by the manufacturer.
I have used pentane as an oil thinner in cascade systems low stage.