Ecoulement en ébullition dans des tubes horizontaux aplatis. 1. Résultats et modèle de chutes de pression dues au frottement diphasique.
Flow boiling in horizontal flattened tubes. 1. Two-phase frictional pressure drop results and model.
Auteurs : MORENO QUIBÉN J., CHENG L., SILVA LIMA R. J. da, et al.
Type d'article : Article
Résumé
Experiments of diabatic two-phase pressure drops in flow boiling were conducted in four horizontal flattened smooth copper tubes with two different heights of 2 and 3 mm. The equivalent diameters of the flat tubes are 8.6, 7.17, 6.25, and 5.3 mm. The working fluids are R22 and R410A, respectively. The test conditions are: mass velocities from 150 to 500 kg/m2.s, heat fluxes from 6 to 40 kW/m2 and saturation temperature of 5°C (reduced pressures p(r) are 0.12 for R22 and 0.19 for R410A). The experimental results of two-phase pressure drops are presented and analyzed. Furthermore, the predicted two-phase frictional pressure drops by the flow pattern based two-phase pressure drop model of Moreno Quibén and Thome using the equivalent diameters were compared to the experimental data. The model, however, underpredicts the flattened tube two-phase frictional pressure drop data. Therefore, correction to the annular flow friction factor was proposed for the flattened tubes and now the method predicts 83.7% of the flattened tube pressure drop data within ±30%. The model is applicable to the flattened tubes in the test condition range in the present study. Extension of the model to other conditions should be verified with experimental data. [Reprinted with permission from Elsevier. Copyright, 2009].
Détails
- Titre original : Flow boiling in horizontal flattened tubes. 1. Two-phase frictional pressure drop results and model.
- Identifiant de la fiche : 2009-1956
- Langues : Anglais
- Source : International Journal of Heat and Mass Transfer - vol. 52 - n. 15-16
- Date d'édition : 07/2009
- DOI : http://dx.doi.org/10.1016/j.ijheatmasstransfer.2008.12.032
Liens
- Voir aussi : Flow boiling in horizontal flattened tubes. 2. Flow boiling heat transfer results and model.
Voir d'autres articles du même numéro (6)
Voir la source
Indexation
-
Flow boiling in horizontal flattened tubes. 2. ...
- Auteurs : MORENO QUIBÉN J., CHENG L., SILVA LIMA R. J. da, et al.
- Date : 07/2009
- Langues : Anglais
- Source : International Journal of Heat and Mass Transfer - vol. 52 - n. 15-16
Voir la fiche
-
An improved two-phase pressure drop correlation...
- Auteurs : DOMANSKI P. A., HERMES C. J. L.
- Date : 21/05/2006
- Langues : Anglais
- Source : ACRA-2006. Proceedings of the 3rd Asian conference on refrigeration and air conditioning.
Voir la fiche
-
Frictional performance of R22 and R410A inside ...
- Auteurs : WANG C. C., CHEN I. Y., SHYU H. J.
- Date : 02/2003
- Langues : Anglais
- Source : International Journal of Heat and Mass Transfer - vol. 46 - n. 4
Voir la fiche
-
Comparison of experimental pressure drop data f...
- Auteurs : MAURO A. W., QUIBEN J. M., MASTRULLO R., et al.
- Date : 12/2007
- Langues : Anglais
- Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 30 - n. 8
- Formats : PDF
Voir la fiche
-
Characteristics of two-phase flow pattern trans...
- Auteurs : PAMITRAN A. S., CHOI K. I., OH J. T., et al.
- Date : 05/2010
- Langues : Anglais
- Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 33 - n. 3
- Formats : PDF
Voir la fiche