Document IIF
Analyse expérimentale et numérique de l'écoulement de dioxyde de carbone transcritique dans des tubes capillaires diabatiques.
Experimental and numerical analysis of transcritical carbon dioxide flow through diabatic capillary tubes.
Auteurs : MELO C., HERMES C. J. L., SILVA D. L. da, et al.
Résumé
This paper advances an experimental and theoretical study of the diabatic flow of carbon dioxide through lateral capillary tube suction line heat exchangers. The influence of both operating conditions (inlet and exit pressures, capillary tube and suction line inlet temperatures) and tube geometry (capillary tube diameter and length, heat exchanger length and relative position, and suction line diameter) on the CO2 mass flow rate and the heat exchanger effectiveness was experimentally evaluated using a purpose-built testing facility with a strict control of the measured variables. In total, 59 tests were carried out with refrigerant mass flow rates ranging from 12 to 22 kg/h and effectivenesses spanning from 0.5 to 0.8. In addition, a mathematical model was put forward based on the mass, energy and momentum conservation principles written accordingly to the one-dimensional differential formulation. The numerical approach consisted of solving the resulting set of differential equations by a 2nd order Runge-Kutta method taking the pressure as the integration domain. The model was validated against experimental data, when a good agreement between the experimental and calculated mass flow rates was achieved with 91.5 and 100% of the data points being within ±5 and 10% error bands, respectively.
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Détails
- Titre original : Experimental and numerical analysis of transcritical carbon dioxide flow through diabatic capillary tubes.
- Identifiant de la fiche : 2009-1899
- Langues : Anglais
- Source : 3rd Conference on Thermophysical Properties and Transfer Processes of Refrigerants
- Date d'édition : 23/06/2009
Liens
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Indexation
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Study of capillary tubes in a transcritical CO2...
- Auteurs : MADSEN K. B., POULSEN C. S., WIESENFARTH M.
- Date : 01/08/2004
- Langues : Anglais
- Source : Natural Working Fluids 2004: 6th IIR-Gustav Lorentzen Conference
- Formats : PDF
Voir la fiche
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Simulation of the flow of carbon dioxide in cap...
- Auteurs : CAO X. L., YU S. X.
- 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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A study of transcritical carbon dioxide flow th...
- Auteurs : SILVA D. L. da, HERMES C. J. L., MELO C., et al.
- Date : 08/2009
- Langues : Anglais
- Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 32 - n. 5
- Formats : PDF
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Algebraic solution of transcritical carbon diox...
- Auteurs : HERMES C. J. L., SILVA D. L. da, MELO C., et al.
- Date : 08/2009
- Langues : Anglais
- Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 32 - n. 5
- Formats : PDF
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Adiabatic capillary tube flow in a transcritica...
- Auteurs : AGRAWAL N., BHATTACHARYYA S.
- Date : 29/05/2006
- Langues : Anglais
- Source : 7th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2006). Proceedings
- Formats : PDF
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