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Using a cross-grooved inner surface for enhancement of heat transfer characteristics inside horizontal tubes for a zeotropic refrigerant. 2. Evaporation test.

[In Japanese. / En japonais.]

Author(s) : UCHIDA M., ITOH M., SHIKAZONO N.

Type of article: Article

Summary

The evaporation of a zeotropic refrigerant (R407C) inside horizontal tubes was investigated experimentally using two types of new cross-grooved tubes and a conventional single-grooved tube. At low mass flows, the improved cross-grooved tube showed higher evaporative heat transfer coefficients than the single-grooved tube, but at higher mass flows the single-grooved tube showed higher heat transfer coefficients. The pressure drop of the cross-grooved tube was greater than that of the improved cross-grooved tube (see also Bulletin of the IIR, ref. 2000-2887).

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 2003-2205
  • Languages: Japanese
  • Source: Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers - vol. 19 - n. 1
  • Publication date: 2002
  • Document available for consultation in the library of the IIR headquarters only.

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