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Chute de pression diphasique de l’ammoniac dans des tubes horizontaux de faible diamètre: expériences et corrélation.

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

Auteurs : GAO Y., FENG Y., SHAO S., et al.

Type d'article : Article, Article de la RIF

Résumé

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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Détails

  • Titre original : Two-phase pressure drop of ammonia in horizontal small diameter tubes: Experiments and correlation.
  • Identifiant de la fiche : 30025389
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 98
  • Date d'édition : 02/2019
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2018.11.018

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