Document IIF
Etude expérimentale sur le transfert de chaleur lors de l’ébullition en écoulement du R245fa et du R1234ze(E) à l’intérieur de tubes à plusieurs orifices.
Experimental study on flow boiling heat transfer of multiport tubes with R245fa and R1234ze(E).
Auteurs : VAKILI-FARAHANI F., AGOSTINI B., THOME J. R.
Type d'article : Article, Article de la RIF
Résumé
The upward flow boiling experiments were carried out in a flat aluminum extruded multiport tube, which is composed of 7 parallel rectangular channels (1.1 × 2.1 mm) with hydraulic diameter of 1.4 mm. Two refrigerants, R245fa and R1234ze, the latter a recent environmentally safe refrigerant proposed as a potential replacement for R134a, were tested. A new hot water heating technique that accounts for either uniform or non-uniform local heat flux distribution along the channel was developed to obtain and reduce the data. Effects of heat flux, mass flux, vapor quality, and saturation temperature on flow boiling heat transfer in multiport tubes were considered. Finally, the experimental results were compared with some well-known correlations to evaluate the capabilities of existing prediction methods. The analysis shows that the three-zone model for slug flows works well for that subset of test results, utilizing the apparent surface roughness in place of the dryout thickness in the model, as has been previously done for silicon, stainless steel and copper microchannels with measured surface roughnesses.
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Détails
- Titre original : Experimental study on flow boiling heat transfer of multiport tubes with R245fa and R1234ze(E).
- Identifiant de la fiche : 30007046
- Langues : Anglais
- Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 36 - n. 2
- Date d'édition : 03/2013
Liens
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Indexation
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Thèmes :
HFC;
Transfert de chaleur;
Ecoulement diphasique - Mots-clés : Écoulement diphasique; R245fa; Microcanal; Transfert de chaleur; R1234ze; Experimentation; Écoulement; Frigorigène; Ébullition
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Two-phase heat transfer and high-speed visualiz...
- Auteurs : SZCZUKIEWICZ S., BORHANI N., THOME J. R.
- Date : 03/2013
- Langues : Anglais
- Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 36 - n. 2
- Formats : PDF
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Two-phase flow and heat transfer of a non azeot...
- Auteurs : DEL COL D., AZZOLIN M., BORTOLIN S.
- Date : 14/07/2014
- Langues : Anglais
- Source : 2014 Purdue Conferences. 15th International Refrigeration and Air-Conditioning Conference at Purdue.
- Formats : PDF
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High heat flux flow boiling in silicon multi-mi...
- Auteurs : AGOSTINI B., THOME J. R., FABBRI M., et al.
- Date : 10/2008
- Langues : Anglais
- Source : International Journal of Heat and Mass Transfer - vol. 51 - n. 21-22
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Experimental investigation of local heat transf...
- Auteurs : BERTSCH S. S., GROLL E. A., GARIMELLA S. V.
- Date : 21/08/2007
- Langues : Anglais
- Source : ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
- Formats : PDF
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Flow visualization of two-phase R-245fa at low ...
- Auteurs : KIM H. J., LIEBENBERG L., JACOBI A.
- Date : 09/07/2018
- Langues : Anglais
- Source : 2018 Purdue Conferences. 17th International Refrigeration and Air-Conditioning Conference at Purdue.
- Formats : PDF
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