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Detection method of the circulating composition in a refrigeration cycle with ternary zeotropic refrigerant mixture R407C.

[In Japanese. / En japonais.]

Author(s) : SUMIDA Y., OKAZAKI T., UENO Y.

Type of article: Article

Summary

A composition sensing circuit (CS circuit) which detects the circulating composition of the ternary zeotropic refrigerant mixture R407C in a refrigeration cycle has been developed. The CS circuit consists of a heat exchanger, a capillary tube, two temperature detectors and one pressure detector. The circulating composition is calculated from the temperature and pressure in the circuit and the vapour-liquid equilibrium for R32/R125. The results indicated that the difference between the calculated and measured composition was within 1% for R32 and R125 and within 2% for R134a in the circulating composition range from 17/20/63 wt% to 29/30/41 wt%. This difference corresponds to less than 0.5 °C in the saturation temperature. This method is therefore applicable to performance stabilization and reliability improvement of the refrigeration cycle with R407C.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 2002-2824
  • Languages: Japanese
  • Source: Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers - vol. 18 - n. 3
  • Publication date: 2001
  • Document available for consultation in the library of the IIR headquarters only.

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