Share

IIR document

Prediction method for flow boiling heat transfer in a herringbone microfin tube.

Author(s) : WELLSANDT S., VAMLING L.

Type of article: Article, IJR article

Summary

Based on experimental data for R134a, the work deals with the development of a prediction method for heat transfer in herringbone microfin tubes. As is shown in earlier work, heat transfer coefficients for the investigated herringbone microfin tube tend to peak at lower vapour qualities than in helical microfin tubes. Correlations developed for other tube types fail to describe this behaviour. A hypothesis that the position of the peak is related to the point where the average film thickness becomes smaller than the fin height is tested and found to be consistent with observed behaviour. The proposed method accounts for this hypothesis and incorporates the well-known Steiner and Taborek correlation for the calculation of flow boiling heat transfer coefficients. The correlation is modified by introducing a surface enhancement factor and adjusting the two-phase multiplier. Experimental data for R134a are predicted with an average residual of 1.5% and a standard deviation of 21%. Tested against experimental data for mixtures R410A and R407C, the proposed method overpredicts experimental data by around 60%. An alternative adjustment of the two-phase multiplier, in order to better predict mixture data, is discussed.

Available documents

Format PDF

Pages: 912-920

Available

  • Public price

    20 €

  • Member price*

    Free

* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).

Details

  • Original title: Prediction method for flow boiling heat transfer in a herringbone microfin tube.
  • Record ID : 2005-2498
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 28 - n. 6
  • Publication date: 2005/09

Links


See other articles in this issue (16)
See the source

Indexing