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Recherche expérimentale sur les caractéristiques de transfert de chaleur par condensation de la vapeur à faible débit massique dans un tube horizontal.

Experimental research on condensation heat transfer characteristics of low mass flow rate steam in a horizontal tube.

Auteurs : GU Y., GONG L., SHEN S.

Type d'article : Article de la RIF

Résumé

The heat exchange character of pure steam flow inside horizontal vacuum tubes has been experimentally studied. The inside diameter and length of the tube are 38 mm and 3400 mm, respectively. The effects of steam mass flow rate, saturated temperature, and total temperature difference ΔTs,c on the flow process are analyzed. Based on the analysis of the heat exchange mechanism of stratified flow condensation, a calculation model of the thermal partition angle is established. The experimental results show that the thermal partition angle increases with the increase of the mass flow rate, and the rise of the heat transfer temperature difference. The saturated temperature has little impact on the local heat transfer coefficient and the thermal partition angle of condensation in the tube. By taking the thermal partition angle as the partition boundary, an empirical correlation formula for calculating the local heat transfer coefficients is established to better predict the results of local heat transfer coefficients.

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Format PDF

Pages : 275-282

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    20 €

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Détails

  • Titre original : Experimental research on condensation heat transfer characteristics of low mass flow rate steam in a horizontal tube.
  • Identifiant de la fiche : 30030525
  • Langues : Anglais
  • Sujet : Technologie
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 144
  • Date d'édition : 12/2022
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2022.08.001

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