Document IIF
Modèle prédictif de la distribution de l’écoulement diphasique dans un collecteur vertical.
Prediction model of two-phase flow distribution in a vertical header.
Numéro : 0272
Auteurs : ONAKA Y., ADACHI R., KISHIDA N., MATSUMOTO T.
Résumé
In order to reduce refrigerant charge, the sizes of tubes found in heat exchangers are being reduced and the number of heat exchanger paths for refrigerant has been increasing. Therefore, the design technologies of vertical headers have recently been garnering much attention. In this study, a nodal/zonal lumped parameter prediction model for the distribution characteristics of a vertical header having more than 30 branches with a Liquid Branch Limit (LBL) model based on the flooding equation, has been developed to improve prediction accuracy for the distribution characteristics when the liquid refrigerant mass flow does not reach the top of the vertical header. The comparison of experimental and calculated temperature distribution at evaporator outlets has been performed to evaluate the accuracy of predictions. In addition, a new T-junction prediction model which takes into consideration flow patterns and liquid film thickness, has been developed so that it can be applied to the vertical header of branch tube intrusion structures in accordance with the T-junction experimental data pertaining to various intrusion depths.
Documents disponibles
Format PDF
Pages : 12 p.
Disponible
Prix public
20 €
Prix membre*
Gratuit
* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)
Détails
- Titre original : Prediction model of two-phase flow distribution in a vertical header.
- Identifiant de la fiche : 30031595
- Langues : Anglais
- Sujet : Technologie
- Source : Proceedings of the 26th IIR International Congress of Refrigeration: Paris , France, August 21-25, 2023.
- Date d'édition : 21/08/2023
- DOI : http://dx.doi.org/10.18462/iir.icr.2023.0272
Liens
Voir d'autres communications du même compte rendu (491)
Voir le compte rendu de la conférence
-
Two-phase pressure drop with non uniform distri...
- Auteurs : LÓPEZ BELCHÍ A., VERA-GARCÍA F., GARCÍA-CASCALES J. R., et al.
- Date : 25/10/2012
- Langues : Anglais
- Source : RCR 2012. 3rd IIR Workshop on Refrigerant Charge Reduction in Refrigerating Systems: Valencia, Spain, October 25-26, 2012.
- Formats : PDF
Voir la fiche
-
Experimentally validated microchanel heat excha...
- Auteurs : PADILLA-FUENTES Y., HRNJAK P.
- Date : 25/06/2012
- Langues : Anglais
- Source : 10th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2012). Proceedings. Delft, The Netherlands, June 25-27, 2012.
- Formats : PDF
Voir la fiche
-
Differential mass evacuation sampling method fo...
- Auteurs : LEE A. J., BACH C. K., BRADSHAW C. R.
- Date : 2022
- Langues : Anglais
- Source : 2022 Purdue Conferences. 19th International Refrigeration and Air-Conditioning Conference at Purdue.
- Formats : PDF
Voir la fiche
-
Prediction of R410A charge amount in a microcha...
- Auteurs : PARK C. Y.
- Date : 21/08/2011
- Langues : Anglais
- Source : Proceedings of the 23rd IIR International Congress of Refrigeration: Prague, Czech Republic, August 21-26, 2011. Overarching theme: Refrigeration for Sustainable Development.
- Formats : PDF
Voir la fiche
-
A generalized analytic method for predicting re...
- Auteurs : HONG S. B., YOO J. W., KIM M. S.
- Date : 23/04/2017
- Langues : Anglais
- Source : 5th IIR Conference on Thermophysical Properties and Transfer Processes of Refrigerants.
- Formats : PDF
Voir la fiche