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Thread: Liquid line sizing
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02-07-2009, 06:04 PM #1
Liquid line sizing
Hello people,
I'm very new to this forum. Just signed up a few minutes ago, tough
I have a question. I have an evaporator with 8.5 kW and I want to determine it's in and out manifolds/tubes. How can I do that ? I know the mass flow (0,1026 kh/second) using R404 A.
Any recommendations ? Please help people.
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02-07-2009, 07:05 PM #2
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Re: Liquid line sizing
http://www.mediafire.com/?g24ywigumyn
Password sent by visitor messageLast edited by nike123; 02-07-2009 at 07:11 PM.
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02-07-2009, 08:09 PM #3
Re: Liquid line sizing
Thanks nike, I hope it'll help me. If I had further questions, may I ask you ?
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15-07-2009, 11:49 PM #4
Re: Liquid line sizing
Hi Nike, do you have any book on designning the air cooled condenser?
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16-07-2009, 06:22 AM #5
Re: Liquid line sizing
@waisk; do you mean it for line sizing ?
Anything about air cooled condensers would also help me. Nike123, please be generous once again and share your informations with us.
Thanks all, especially Nike..
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16-07-2009, 08:36 PM #6
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16-07-2009, 08:39 PM #7
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17-07-2009, 08:05 AM #8
Re: Liquid line sizing
What do you mean by designing a condenser ?
First get the kw rating of condenser right & approach a manufacturer for the rest . Here is how you can size a condenser :
Condenser thr / capacity =
cooling load in kw + kw rating of motor + 10 to 20% for air-conditioning or plus temp jobs .
For a low temp jobs , take a cut off suction saturation temp & find out the motor kw .add to the cooling load at design cond .
Example:
Evap temp : (-35) deg c, condensing 35 deg c
refrigerant : R-404a
cooling load : 30 kw
##find out the compressor power requd at say -20 deg c (assuming the evap temp to rise on a fresh start or after defrost cycle )
add up the power ## to the cooling load in kw ( 30 kw in this example) = condenser capacity
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27-12-2009, 10:33 AM #9
Re: Liquid line sizing
nice info. Keep it up
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