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Condensation heat transfer and flow pattern inside a herringbone-type micro-fin tube.

Author(s) : MIYARA A., NONAKA K., TANIGUCHI M.

Type of article: Article, IJR article

Summary

Condensation heat transfer and pressure drop of R410A and R22 in a newly proposed herringbone-type micro-fin tube are measured and compared to those of a helical micro-fin tube and a smooth tube. The heat transfer coefficient of the herringbone micro-fin tube is higher than that of the helical micro-fin tube in the high mass velocity region, while it has slightly lower value in the low mass velocity region. Pressure drop of the herringbone micro-fin tube is, however, higher than that of the helical micro-fin tube. Flow patterns of the herringbone micro-fin tube are observed and the heat transfer enhancement mechanism is discussed. The heat transfer coefficient and pressure drop of the helical micro-fin tube is predicted well with previously proposed correlations, while those of the herringbone-type micro-fin tube has higher value than the predicted values. Preliminary correlations for the pressure drop and the heat transfer coefficient are proposed for the herringbone micro-fin tube.

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Pages: 141-152

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Details

  • Original title: Condensation heat transfer and flow pattern inside a herringbone-type micro-fin tube.
  • Record ID : 2000-2436
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 23 - n. 2
  • Publication date: 2000/03

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