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Thread: cap tube sizing calculation
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21-01-2011, 05:41 PM #1
cap tube sizing calculation
evening all, got lumbered with this one. need to replace a 3.5m 1.3mm inside diameter cap tube and need the lendths if having to use either .64 or .52
any ideas
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21-01-2011, 06:01 PM #2
Re: cap tube sizing calculation
http://www.coolit.co.za/
You can download a program from this site.Engineering Specialist - Cuprobraze, Nocolok, CD Technology
Rarefied Technologies ( SE Asia )
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21-01-2011, 07:31 PM #3
Re: cap tube sizing calculation
Or you can try Dancap
http://www.danfoss.com/United_Kingdo...ils/DanCap.htmBrian - Newton Abbot, Devon, UK
Retired March 2015
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22-01-2011, 02:05 AM #4
Re: cap tube sizing calculation
Thanks for that link Brian, Ive downloaded the dancap programme and ive come up with an answer that i didnt expect. I expected as using a cap tube 50% smaller then the cap tube to be 50-60% ish shorter but this is what ive put and what its come up with. For the record the unit is a 3 half glass door freezer. Parameters ive put into the equasion are (And i dont think it makes a lot of difference anyway)
R404 This I know is correct
Evap temp -22f
Condenser temp 120
Return gas temp 0
3.5m of 1.20mm cap = .025m (25cm!!!) of .7mm cap
Can someone double check this for me as i seems VERY short
Thanks
Latte
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22-01-2011, 04:29 AM #5
Re: cap tube sizing calculation
Some previous users of Dancap have commented on odd results. You may want to try the Coolit link I provided. The answers seems closer to what I found to work in the past.
Engineering Specialist - Cuprobraze, Nocolok, CD Technology
Rarefied Technologies ( SE Asia )
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22-01-2011, 11:25 PM #6
Re: cap tube sizing calculation
Yes, always double check these bits of software - if at first you don't succeed etc....
Brian - Newton Abbot, Devon, UK
Retired March 2015
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24-01-2011, 05:12 AM #7
Re: cap tube sizing calculation
hey, i have a condensor 5 pk sanyo. the condensor has no capiler tube.
im going to use daikin evaporator but it also has no cap tube
how long the additional cap tube should be if i want to put the cap tube in evaporator side???
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24-01-2011, 12:17 PM #8
Re: cap tube sizing calculation
thanks for the replies.
i'll try it.
thanks bro
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24-01-2011, 12:49 PM #9
Re: cap tube sizing calculation
I've used R407c since a year ago.
recently I get problems to get it.
Some suppliers offer me to use R404a.
which one is better between the two??
what is the effect to my compressors and my AC performance???
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25-01-2011, 07:00 AM #10
Re: cap tube sizing calculation
You can try tecumseh's capilary tube selection...
http://depositfiles.com/en/files/mv4hle77eIn some places will have to think ...
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27-01-2011, 05:12 AM #11
Re: cap tube sizing calculation
1.3mm is .054. .064 is 1.62mm
conversion factor is 2.20.
This would give you a length of 3.5m x 2.2
= 7.7m of .064
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31-01-2011, 05:34 PM #12
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02-02-2011, 09:15 AM #13
Re: cap tube sizing calculation
what size (cc) is the comp? we size our captubes on comp size and have vastly different lengths to the dancap results.
also are you running med or low temp?
is the evap single or multiple feed? i assume no distributor as they should be removed if not using a valve.
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14-02-2011, 07:53 PM #14
Re: cap tube sizing calculation
Hi Folks,
i have searched on the forum but i couldn't find a formula for capillary sizing? Do we have it anywhere on forum? If not could somebody redirect me on certain website or literature
BRBe careful about reading health books. You may die of a misprint.
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