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Peter_1
31-12-2006, 11:37 AM
http://www.cibse.org/pdfs/4a%20A%20Campbell.pdf

http://www.airah.org.au/downloads/2002-06-02.pdf

Andy P
31-12-2006, 07:07 PM
Hi,

The system Andy Campbell was describing was a cascade with R-404A on the high temp side and CO2 on the low temp side. Its the R-404A that is condensing at 36'C - well below it's critical temp of 72'C

cheers

Andy P

besh3333
20-03-2007, 08:46 AM
Hi,
Thanks for good links, but do you have any idea how man can dimension pipe system for Co2? I tried Cool pack but there is not alternative to choose co2.

Peter_1
20-03-2007, 12:24 PM
The good old way: manual, isn't such a big effort with an Excel spreadsheet.

US Iceman
20-03-2007, 12:32 PM
The Danfoss program may have CO2 data for that purpose. I don't use this program but from the information I have heard it is a very useful tool.

If that program does not have this capability, then you have to do what Peter said; calculate it by hand or in a spreadsheet.

750 Valve
21-03-2007, 12:57 PM
I think danfoss' dircalc program has the ability, I will check tomorrow and confirm

Josip
21-03-2007, 02:22 PM
Hi, :)

DirCalc 1-14 has 20 refrigerants, CO2 too;)

Good tool, definitely:)

Best regards, Josip :)

Bones
22-03-2007, 12:54 AM
thanks for the information, now just time to si down and take the information in would be good ;)