-
convert to R290
I'm having a whole bunch of freezer systems moved from old freezers to new
they almost all run on R404a
talked to engineer about swapping to a different gas now, the thinking being r404 will be harder and harder to work with in the future
we pondered about r290.... condensing units are all outside in fresh air, short pipe runs to evaps, would need to swap to explosion proof lights inside the freezers and add alarms
but... there doesn't seam to be a lot of that going on?
reluctant to switch to another gas now that will be phased out later on
if we swapped a few systems over now, could recover the 404 and save it for the other systems later on
can't see a lot of info about r290 in older scroll compressors?
anyone have any ideas/input?
-
Re: convert to R290
you need to check if compressors are suitable to run on R290 you will need spark proof electrics also volume of room needs to be calculated to check maximum charge of refrigerant that you can have in the system. there are other refrigerants you can convert to that might be easer
-
Re: convert to R290
I'm wondering which other gas I can retrofit which will give a decent capacity and be around for a long time?
r290 is the only one I can think of?.... have to assume there'll be a steady purge (hehe) of refrigerants
spark proof electrics are no problem, have some experience with that stuff
didn't think about volume of the room, that might be a problem, rough 1700cubic feet (about 50 cubic meters) and 3 seperate systems with a bit over 10kg of gas in each
well... they had ~10kg of r404 in them, I think charge is noticeably lower with r290 ?
-
Re: convert to R290
Units outside cooling brine, and pump the brine to the rooms?
Units outside cooling CO2, and pump liquid CO2 to the rooms?
Sell the old kit and use the money to buy units or a chiller that runs on a natural refrigerant?
-
Re: convert to R290
.
You might want to look at.
Page 7 has your limits.
https://www.logic4training.co.uk/wp-...Guidelines.pdf
It's from ACRIB.
Regards
Rob
.