Résumé
Nucleate pool boiling heat transfer coefficients of HCFC-123, CFC-11, HCFC-142b, HFC-134a, CFC-12, HCFC-22, HFC-125 and HFC-32 on a horizontal smooth tube of 19.0 mm outside diameter have been measured. A cartridge heater was used to generate uniform heat flux on the tube. Data were taken in the order of decreasing heat flux from 80 to 10 kW/m2 with an interval of 10 kW/m2 in the pool of 7 °C. It was found that nucleate boiling heat transfer correlations available in the literature were not good for certain alternative refrigerants such as HFC-32 and HCFC-142b. Hence, a new correlation was developed by a regression analysis taking into account the variation of the exponent to the heat flux term as a function of reduced pressure and some other properties. The new correlation showed a good agreement with all measured data including those of new refrigerants of significantly varying vapour pressures with a mean deviation of less than 7%.
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Détails
- Titre original : Nucleate boiling heat transfer coefficients of pure halogenated refrigerants.
- Identifiant de la fiche : 2004-2167
- Langues : Anglais
- Source : 21st IIR International Congress of Refrigeration: Serving the Needs of Mankind.
- Date d'édition : 17/08/2003
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Indexation
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Thèmes :
HCFC;
HFC;
Transfert de chaleur;
Transfert de masse - Mots-clés : R134a; Ébullition libre; Tube horizontal; Coefficient de transfert de chaleur; R32; R22; R142b; R125; R123; Frigorigène
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Flow condensation heat transfer coefficients (H...
- Auteurs : JUNG D., CHO Y., KIM S.
- Date : 17/08/2003
- Langues : Anglais
- Source : 21st IIR International Congress of Refrigeration: Serving the Needs of Mankind.
- Formats : PDF
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Flow condensation heat transfer coefficients of...
- Auteurs : JUNG D., SONG K. H., CHO Y.
- Date : 01/2003
- Langues : Anglais
- Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 26 - n. 1
- Formats : PDF
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Flow boiling heat transfer experiments with zeo...
- Auteurs : ROHLIN P.
- Date : 20/08/1995
- Langues : Anglais
- Source : For a Better Quality of Life. 19th International Congress of Refrigeration.
- Formats : PDF
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Prediction of evaporation heat transfer coeffic...
- Auteurs : JUNG D., RADERMACHER R.
- Date : 05/1993
- Langues : Anglais
- Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 16 - n. 3
- Formats : PDF
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Nucleate pool boiling data for five refrigerant...
- Auteurs : WEBB R. L., PAIS C.
- Date : 08/1992
- Langues : Anglais
- Source : International Journal of Heat and Mass Transfer - vol. 35 - n. 8
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