Can any1 tell mec how to calculate the length and dia of capillary in refrigeration
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Can any1 tell mec how to calculate the length and dia of capillary in refrigeration
this might help.
chemi
Hi Chem
Thats the best info I have seen on cap tubes. Thx Chem
I think that frank pointed this link in the past.
I'm just collecting pdf's. got thousands of them.
chemi :)
Way 2 go maiteQuote:
Originally Posted by chemi-cool
Thanx :)
Chemi, excellent cap tube reference.
One thing to note, the principle of a cap tube that differs somewhat from an orifice is that liquid flows through much easier than vapor. A correctly sized cap tube will be slightly larger than absolutely required. This is because the size of the charge is the ultimate limiting factor.
Another way of saying this is that in a properly sized captube system, adding excess refrigerant will flood back to the compressor NOT back up into the condenser. This is not to say you want to flood the compressor. You must limit the charge under design conditions so that this does not happen.
This will give you the optimum design with minimum charge, allow for rapid equalization during the off cycle (important for starting with low-torque designs) and minimize refrigerant in the crankcase at initial start-up.
(If you are designing a captube system for the first time, check with the compressor mfg for the maximum amount of refrigerant in the crankcase they will permit without voiding the warranty, because that is where it will be on initial start-up!)
Rog
Unithé Hemétique has a selection CD for his compressors with an automatic selection of the capillary tubes.
Will try to post it somewhere.
peter
Attached an old schematic from UH I used many times in the past.
Is it readable /usefull?
here are some stats given by danfoss about length of capillary tubeQuote:
Originally Posted by chemi-cool
Do the two results(given in my attachment and one by chemicool) resemble
say for
FR11G (-10/5 C)
:confused:
send me a private massage with your email and I will send you a better one.
too big to post here.
chemi
Quote:
Originally Posted by chemi-cool
EXCELLENT ----- CC
BENI JOSEPH
hello peter,
can you supply me such diagram for the refrigerant r134a? i am looking for it for a long time.
thank you very much!
Crystal
corrct sizes of capillaries for deepfreezers