Using a cross-grooved inner surface for enhancement of heat transfer characteristics inside horizontal tubes for zeotropic refrigerant. 1. Condensation test.

[In Japanese. / En japonais.]

Author(s) : UCHIDA M., ITOH M., SIKAZONO N., et al.

Type of article: Article


The performance of two types of cross-grooved surfaces are compared to that of single-grooved surfaces. The improved cross-grooved tube has provided with higher condensation heat transfer coefficients than the single-grooved tube at a low mass flow velocity. However, at a high mass flow velocity, the difference between single and cross-grooved tube is not evident. The pressure drop of improved cross-grooved tube is slightly higher than that of the single-grooved tube.


  • Original title: [In Japanese. / En japonais.]
  • Record ID : 2000-2887
  • Languages: Japanese
  • Source: Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers - vol. 16 - n. 2
  • Publication date: 1999
  • Document available for consultation in the library of the IIR headquarters only.


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