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Two-phase pressure drop of ammonia in horizontal small diameter tubes: Experiments and correlation.

Author(s) : GAO Y., FENG Y., SHAO S., et al.

Type of article: Article, IJR article

Summary

A series of experiments are conducted to investigate the two-phase pressure drop of ammonia in horizontal small diameter tube. The experiments are performed at saturation temperatures of -15.8–4.6 °C, and the mass flux range is from 20 to 100?kg m-2 s-1. This paper analyzes the influence mechanisms of vapor quality, mass flux, saturation temperature, and tube diameter on the two-phase frictional pressure gradient in detail. Meanwhile, several correlations are compared with all the experimental data and the results show that the Müller-Steinhagen and Heck (1986) correlation gives the best agreement. With the analysis of the major forces for ammonia two-phase flow under the tested experimental conditions, the Reynolds number and Bond number are introduced to modify the Müller-Steinhagen and Heck (1986) correlation. Lastly, a modified correlation is developed with the mean absolute deviation of only 13.5%, and 89.2% of the data are within the?±?30% error band. In addition, the modified correlation is evaluated based on a complied database which contains 951 experimental data points from 11 published literatures.

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Pages: 283-293

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Details

  • Original title: Two-phase pressure drop of ammonia in horizontal small diameter tubes: Experiments and correlation.
  • Record ID : 30025389
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 98
  • Publication date: 2019/02
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2018.11.018

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