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A.Mortezania
14-03-2017, 07:43 PM
Dear Friends,

1 - Would you please what specification refrigerant inside of centrifugal chillers must have ? It means why for example we can not use R507 at centrifugal chillers ?

2 In past companies used R11 , R12 inside of centrifugal chillers and compressors, Nowadays what are common refrigerant type that they use ?

Sincerely yours.

hyperion
15-03-2017, 12:03 PM
It depends on the manufacturer, some are using R134a.

managingsumthin
29-03-2017, 07:40 PM
You should try it and let us know, why use multiple options when perfectly good known ones have been developed , tested and are in use. Also the vessels would not be rated for those higher pressures.

Rob White
30-03-2017, 12:03 PM
.

R134a was the refrigerant for a lot of chillers but
in the EU R134a is so regulated it will not be in
common use by 2020 and probably gone by 2030??

The refrigerant that seems to be favorite at the moment
is the new R1234 range, I know of some big installations
where the R134a has been pulled and replaced by the new
R1234.

I think time will only tell.

:)

Rob

.

joe-ice
30-03-2017, 11:17 PM
Is that the r1234 they are using in automotive , it seems to be a crazy price?

Rob White
31-03-2017, 11:10 PM
Is that the r1234 they are using in automotive , it seems to be a crazy price?

There is more than one version, YF and ZE I think
and price at moment is prohibative and I do wonder
what will happen as the HFC's are phased down due
to quotas.

Will the R1234 price drop as it is used more, I'm not
sure???

Rob

.

joe-ice
01-04-2017, 09:23 AM
Thanks, correct it will be interesting to see what happens , At the moment i would not fancy owning a large install that leaked that gas , It would be the bill not the gas that would bring a tear to the eye .

Grizzly
01-04-2017, 08:19 PM
Here is a couple of snaps of me recovering 375kg of R123 into the correct recovery drums.
12 x 30kg and 1 x 14.75kg
3 to 4 psi of nitrogen and you pour it into the drums.
This old Centrif had been mothballed for several years and this was finally de-commissioning it.
Provided the R123 is below 11Psi it does not boil off.
I wish newer refrigerants were as simple to deal with.
Grizzly