Helo friends

[besh3333]

Hi,
i was wondring that some one know formula to calculate the suction and discharge pipe size in refrigeration, we use some tables but i was wondring if some one remember from school or???
For exampel calculate a suction line for R507 for a 20 kilowatt compressor for -10 c in evaprator and 40 c in condesator
thanks

[Brian_UK]

It rather depends on the gas return speed that you require.

Download Coolpack calculation program to help with your calcluations.
http://www.et.web.mek.dtu.dk/Coolpack/

[Peter_1]

Or Danven from Danfoss. It's free.

[US Iceman]

Hi besh3333,

We discussed this in another thread.

http://www.refrigeration-engineer.com/forums/showthread.php?t=4672&highlight=pressure+drop

Some of the addresses shown will describe the calculation procedures.