Liquid line sizing

[wolfied]

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.

[nike123]

http://www.mediafire.com/?g24ywigumyn

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[wolfied]

Thanks nike, I hope it'll help me. If I had further questions, may I ask you ?

[waisk]

Hi Nike, do you have any book on designning the air cooled condenser?

[wolfied]

@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..

[nike123]

Hi Nike, do you have any book on designning the air cooled condenser?

Sorry, no!............

[nike123]

Thanks nike, I hope it'll help me. If I had further questions, may I ask you ?

Your questions are welcome and I will help at best I could, but I am not design engineer.
But, I am sure that many members hare are also able and wiling to help you.

[D.D.KORANNE]

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

[shaman]

nice info. Keep it up