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Capacity comparisons and operating experience of reciprocating chillers with R407C and R22.

[In German. / En allemand.]

Author(s) : HARTMANN K.

Type of article: Article

Summary

Although the zeotrope refrigerant R407C has characteristics similar to R22, it cannot be considered as a full drop-in for R22. Regarding trouble-free compressor performance, especially the different solubility of refrigerant into synthetic oil, has to be noted; at start up the oil pump must handle increased demand. Exact measurements also show differences in heat transfer, where plate heat exchangers perform better than plate fin coils and shell-and-tube exchanger, respectively. With several heat exchanger configurations and numerous laboratory tests it is shown that general numbers in percentage of capacity changes are not worthwhile and that only a change of refrigerant in R22 systems will result in lower COP in any case.

Details

  • Original title: [In German. / En allemand.]
  • Record ID : 1997-3203
  • Languages: German
  • Source: KI Luft Kältetech. - n. 11
  • Publication date: 1996/11
  • Document available for consultation in the library of the IIR headquarters only.

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