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Composition shift in liquid-recirculation refrigerating systems: an experimental investigation for the pure fluid R134a and the mixture R32/R134a.

Author(s) : GIULIANI G., HEWITT N. J., MARCHESI DONATI F., POLONARA F.

Type of article: Article, IJR article

Summary

The ability of zeotropic mixtures with a remarkable temperature glide to operate in liquid-recirculation systems is investigated and the results of an experimental comparison between the performances of the pure fluid R134a and the zeotropic mixture R32/R134a (25/75% by mass) are presented. R134a performs slightly better in the liquid-recirculation mode than in the traditional dry-expansion mode; on the other hand, liquid-recirculation configuration has a detrimental effect on the zeotropic mixture's performance. The reason for this detrimental effect is the mixture component separation which occurs at the liquid/vapour separator. The effect of this separation is investigated using gas chromatograph analysis.

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Pages: 486-498

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Details

  • Original title: Composition shift in liquid-recirculation refrigerating systems: an experimental investigation for the pure fluid R134a and the mixture R32/R134a.
  • Record ID : 2000-0073
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 22 - n. 6
  • Publication date: 1999/09

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