Modèle fondé sur le régime d'écoulement pour les prévisions de chutes de pression dans des microcanaux.
Flow-regime-based model for pressure drop predictions in microchannels.
Auteurs : NIÑO V. G., JASSIM E. W., HRNJAK P. S., et al.
Type d'article : Article
Résumé
A flow-regime-based pressure drop model is developed to correlate experimental data in the intermittent and annular flow regime. For the intermittent region, an alternative method for microchannel pressure drop predictions based on the average kinetic energy of the mixture is developed. A parameter based in the Weber number, the Lockhart-Martinelli parameter, and the liquid-to-vapour density ratio is proposed for pressure drop predictions in the annular flow region. The two correlations were built on experimental data of R410A, R134a, and air-water mixtures with mass fluxes ranging from 50 to 300 kg/(s.m2), with quality ranging from 0 to 1. Six-port and fourteen-port aluminium microchannel tubes with hydraulic diameters of 1.54 and 1.02 mm respectively, were used for the two-phase pressure drop experiments. Entrance/exit zones have been found to exhibit homogeneous flow characteristics, and were correlated to a homogeneous flow parameter based on the kinetic energy of the flow field.
Détails
- Titre original : Flow-regime-based model for pressure drop predictions in microchannels.
- Identifiant de la fiche : 2006-1159
- Langues : Anglais
- Source : HVAC&R Research - vol. 12 - n. 1
- Date d'édition : 01/2006
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Indexation
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Thèmes :
HFC;
Transfert de chaleur;
Mélanges - Mots-clés : R410A; R134a; Corrélation; Microcanal; Air-eau; Modélisation; Mélange; Écoulement; Échangeur de chaleur; Chute de pression
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Prediction of two-phase pressure drop and void ...
- Auteurs : JASSIM E. W., NEWELL T. A.
- Date : 07/2006
- Langues : Anglais
- Source : International Journal of Heat and Mass Transfer - vol. 49 - n. 15-16
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Flow boiling heat transfer and pressure drop fo...
- Auteurs : YIN X., WANG W., PATNAIK V., et al.
- Date : 24/08/2019
- Langues : Anglais
- Source : Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
- Formats : PDF
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Two phase pressure drop in microchannels.
- Auteurs : NIÑO V., PAYNE W., HRNJAK P., et al.
- Date : 03/10/2001
- Langues : Anglais
- Source : Thermophysical Properties and Transfer Processes of New Refrigerants.
- Formats : PDF
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Boiling heat transfer and pressure drop of R410...
- Auteurs : PAMITRAN A. S., CHOI K. I., OH J. T., et al.
- Date : 20/05/2009
- Langues : Anglais
- Source : ACRA-2009. The proceedings of the 4th Asian conference on refrigeration and air conditioning: May 20-22, 2009, Taipei, R.O.C.
- Formats : PDF
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Ocena przydatnosci metody Lockharta-Martinellie...
- Auteurs : DUTKOWSKI K.
- Date : 15/10/2008
- Langues : Polonais
- Source : Projektowanie i eksploatacja przyjaznych srodowisku systemów chlodniczych i klimatyzacyjnych. Miedzynarodowa konferencja. XL Dni chlodnictwa.
- Formats : PDF
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