Share
IIR document
Experimental measurements for condensation of downward-flowing R123/R134a in a staggered bundle of horizontal low-finned tubes with four fin geometries.
Author(s) : HONDA H., TAKAMATSU H., TAKATA N.
Type of article: Article, IJR article
Summary
Experiments were conducted to obtain row-by-row heat and mass transfer data during condensation of downward-flowing zeotropic mixture R123/R134a in a staggered bundle of horizontal low-finned tubes. The vapor temperature and the mass fraction of R134a at the tube bundle inlet were about 50 °C and 14%, respectively. The refrigerant mass velocity ranged from 9 to 34 kg/m2s, and the condensation temperature difference from 1.9 to 12 K. Four kinds of low-finned tubes with different fin geometry were tested. The highest heat transfer coefficient was obtained with a tube which showed the highest performance for R123. However, the difference among the tubes was much smaller for the mixture than for R123. The heat transfer coefficient and the vapor-phase mass transfer coefficient decreased significantly with decreasing mass velocity. The mass transfer coefficient increased with condensation temperature difference, which was due to the effect of suction associated with condensation. On the basis of the analogy between heat and mass transfer, a dimensionless correlation of the mass transfer coefficient was developed for each tube.
Available documents
Format PDF
Pages: 615-624
Available
Public price
20 €
Member price*
Free
* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).
Details
- Original title: Experimental measurements for condensation of downward-flowing R123/R134a in a staggered bundle of horizontal low-finned tubes with four fin geometries.
- Record ID : 2000-0673
- Languages: English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 22 - n. 8
- Publication date: 1999/12
Links
See other articles in this issue (5)
See the source
Indexing
-
Themes:
HCFCs;
HFCs;
Mass transfer;
Blends - Keywords: R134a; Finned tube; Mass transfer; Heat transfer; R123; Zeotropic mixture; Condensation
-
Effect of fin geometry on condensation of downw...
- Author(s) : HONDA H., TAKAMATSU H., TAKATA N.
- Date : 1998/11/17
- Languages : English
- Source: Heat transfer in condensation and evaporation: application to industrial and environmental processes. Preprints of the EUROTHERM Seminar 62.
View record
-
AN EXPERIMENTAL INVESTIGATION ON FORCED CONVECT...
- Author(s) : MURATA K., HASHIZUME K.
- Date : 1991/08/10
- Languages : English
- Source: New challenges in refrigeration. Proceedings of the XVIIIth International Congress of Refrigeration, August 10-17, 1991, Montreal, Quebec, Canada.
- Formats : PDF
View record
-
Condensation heat transfer of a pure fluid and ...
- Author(s) : SIGNE J. C., BONTEMPS A., MARVILLET C.
- Date : 1998/11/17
- Languages : English
- Source: Heat transfer in condensation and evaporation: application to industrial and environmental processes. Preprints of the EUROTHERM Seminar 62.
View record
-
Prediction of heat transfer characteristics of ...
- Author(s) : YARA T., KOYAMA S.
- Date : 2007
- Languages : Japanese
- Source: Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers - vol. 24 - n. 4
View record
-
Flow boiling heat transfer experiments with zeo...
- Author(s) : ROHLIN P.
- Date : 1995/08/20
- Languages : English
- Source: For a Better Quality of Life. 19th International Congress of Refrigeration.
- Formats : PDF
View record