The chiller with R-452B is an ecological alternative with excellent performance. It is used for the replacement of R-410A and the acquisition of new equipment.
R452b is a zeotropic HFO / HFC blend classified as a mildly flammable refrigerant (A2L ASHRAE safety class) that offers an optimal balance of performance, safety and compatibility as a replacement for R410A.
What should you know before chilling with R-452B?
- R410A consists of a mixture of R32 + R125 in a 50/50 ratio.
- R452B consists of the same chemicals as R410A, with a 26% increase in R1234yf. R32: 67% and R125: 7%.
- The R452B has almost the same capacity as the R410A, with slightly better efficiency.
- R454-B is an environmentally friendly alternative to R410a gas with a GWP value of 675.
- The discharge temperature of R-452B is much lower than that of R32.
- The discharge temperature of R-452B is very close to R410A.
- R452B has a lower mass flow rate than R410A. R452 generates a lower pressure drop in pipes compared to R-410A.
- The R454B offers slightly less capacity, but has the benefit of an even lower GWP.
- In terms of capacity and efficiency, R452b is the direct replacement for R410a.
- The r452b provides excellent performance under elevated ambient conditions for air-cooled chillers.
- R452b leaks just barely reach the flammable limit. R452B has a lower heat of ignition, this factor hinders its use in larger equipment.
- The reconversion of R-410A by R452B. works with COP values that are 0% to 5% higher.
- The refrigerant charge with R452B is about 10% less than with R410A.
- It has a low temperature glide.
- The energy efficiency of chillers running on R452b increases by 3.2%, while the capacity is reduced by only 1.7% with the refrigerant mass flow of 80%, compared to R410a.
Where to learn all about chillers?
We have prepared a complete training in chilled water installations with chillers.
