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18-06-2012, 10:22 AM #1
R22 retrofit flooded Industrial plant
Has anyone changed refrigerant in a flooded R22 plant with good results?
Have a plant with approx 700kg of R22 with a flooded shell & tube heat exchanger.
Refrigerant on tube, side single stage economized plant with screw compressor.
-40 C sst mineral oil used.
Have had R434A recommended, any other suggestions etc
Thanks
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22-06-2012, 09:30 AM #2
Re: R22 retrofit flooded Industrial plant
First off, using a refrigerant with glide in a flooded system is not the preferred option, however R-434A has minimal glide, similar to R-404A. The pressure of R-434A is approximately 25% higher than R-22, so it will require modification of the system to account for the different properties of the refrigerant. The cost to retrofit from R-22 to R-434A may be substantial.
If you are going to put a lot of money into the system, it may be better to go with a more mainstream refrigerant with minimal glide like R-507 or R-404A. The availability and cost should be much more attractive in the long term than with a limited availability refrigerant like R-434A.
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22-06-2012, 10:35 AM #3
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22-06-2012, 03:00 PM #4
Re: R22 retrofit flooded Industrial plant
i ve replaced r 22 with r 422 that has similar characteristic with the old but you need to change the oil with polyester oil!
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22-06-2012, 03:11 PM #5
Re: R22 retrofit flooded Industrial plant
www2.dupont.com/Refrigerants/en_GB/products/isceon29.html