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Comparison of R-404A, R-448A and R-452A as drop-in replacements for R-218 in special applications.

Number: pap. n. 804

Author(s) : DOUBEK M., VACEK V.

Summary

We  present  a  comparison  of  the  R-­404A,  R-­448A  and  R-­452A  as  drop-­in  replacements  for  R-­218   refrigerant  in  high-­tech  electronics  cooling.  The  tests  were  carried  out  in  an  oil-­less  experimental   circuit  originally  designed  for  cooling  of  silicon  chips  with  R-­218.  The  circuit  is  equipped  with  tens  of   temperature,  pressure  and  flow  sensors  and  precise  liquid  and  vapour  pressure  control.  The  same   capillary  was  used  for  all  the  tested  refrigerants  providing  mass  flow  of  1.2  g/s.  Two-­stage   compression  allowed  to  test  suction  pressures  from  0.5-­1  bar  absolute.  The  aim  was  to  evaluate  the   possibility  of  replacing  the  rarely  used,  expensive  and  environment  unfriendly  R-­218  by  more   ecological  blends  while  achieving  lower  evaporation  temperature  and  without  hardware   modifications  to  the  existing  circuit  layout.  The  results  are  applicable  to  low  temperature  systems   with  commercial  two-­stage  reciprocating  compressors  that  are  being  converted  from  R-­404A  to   ecological  alternatives  R-­448A/R-­449A  or  R-­452A.  

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Details

  • Original title: Comparison of R-404A, R-448A and R-452A as drop-in replacements for R-218 in special applications.
  • Record ID : 30026034
  • Languages: English
  • Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Publication date: 2019/08/24
  • DOI: http://dx.doi.org/10.18462/iir.icr.2019.0804

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