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Dryout quality for refrigerants flowing in horizontal evaporator tubes.

[In Japanese. / En japonais.]

Author(s) : YOSHIDA S., MORI H., KAKIMOTO Y., et al.

Type of article: Article

Summary

Experiments were made with HFC-134a and HCFC-22 inside smooth tubes and a spirally grooved tube. At given conditions, dryout proceeded over a certain quality range. Therefore two dryout quality were defined: dryout inception quality at which the circumferentially averaged (axially local) heat transfer coefficient began to decrease rapidly, and dryout completion quality at which the decrease in the heat transfer coefficient ended. The characteristics of both dryout qualities were clarified, and thereby were classified into three characteristic regimes for the smooth tube and two regimes for the micro-fin tube. A dimensionless correlation of each dryout quality, was developed for the respective tubes.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 2001-2675
  • Languages: Japanese
  • Source: Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers - vol. 17 - n. 4
  • Publication date: 2000
  • Document available for consultation in the library of the IIR headquarters only.

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