Abstract
The paper presents the results obtained by substituting R22 with
mixtures of R32/R124/134a (R407A, R407B and R407C) in an existing
refrigeration plant. The cooling water flow and cooling water
inlet temperature together with the brine flow and brine inlet
temperature have been kept on a value corresponding to the value
when the refrigeration plant worked with R22.Primarily the
capacity and the coefficient of performance have been measured.In
addition the performance of the compressor given as volumetric and
isentropic efficiency together with the mean heat transfer
coefficient in the evaporator have been determined.The results
show that for R407C both the cooling capacity and the COP are
smaller than the cooling capacity and COP for R22. The cooling
capacity for R407A and for R407B is lower then the cooling
capacity for R22 for brine temperatures less than 0 C and higher
than the capacity for R22 for brine temperatures higher than 0 C.
The COP for R407A and 407B are lower than the COP for R22.The
volumetriv and isentropic efficiency of the compressor are with
mixtures higher than the volumetric and isentropic efficiency with
R22.
| Original language | English |
|---|---|
| Title of host publication | 15. Nordiske Kølemødet/8. Nordiske Varmepumpedagene |
| Place of Publication | Reykjavik |
| Publisher | Islands Køleforening |
| Publication date | 1997 |
| Pages | 1-12 |
| Publication status | Published - 1997 |
| Event | 15. Nordiske Køledage. - Reykjavik, Iceland Duration: 1 Jan 1997 → … |
Conference
| Conference | 15. Nordiske Køledage. |
|---|---|
| City | Reykjavik, Iceland |
| Period | 01/01/1997 → … |