The effect of diameter on boiling heat transfer from the outside of small horizontal tubes

P. A. Kew, S. D. Houston

Research output: Contribution to journalArticle

Abstract

Recent studies have suggested that tube diameter is a relevant parameter which should be included when correlating heat transfer data for pool boiling on horizontal tubes. However, there are few data for tubes of diameter less than 8 mm, and the diameter effect for small tubes has not been determined. This paper reports the results of an experimental investigation using tubes of 1-6 mm diameter. Tests have been carried out with water and refrigerant R141b at heat fluxes ranging from 1 to 90% of the critical heat flux. The results indicate that correlations which show an inverse relationship between heat transfer coefficient and diameter should not be applied for tubes of less than 6 mm diameter. Conventional pool boiling correlations derived from data acquired from boiling on wires and flat plates yielded acceptable results when applied to the test data from this study.

Original languageEnglish
Pages (from-to)278-283
Number of pages6
JournalChemical Engineering Research and Design
Volume80
Issue number3
DOIs
Publication statusPublished - Apr 2002

Fingerprint

Boiling liquids
Heat transfer
Heat flux
Refrigerants
Heat transfer coefficients
Wire
Water

Keywords

  • Nucleate boiling
  • Pool boiling
  • Process intensification

Cite this

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abstract = "Recent studies have suggested that tube diameter is a relevant parameter which should be included when correlating heat transfer data for pool boiling on horizontal tubes. However, there are few data for tubes of diameter less than 8 mm, and the diameter effect for small tubes has not been determined. This paper reports the results of an experimental investigation using tubes of 1-6 mm diameter. Tests have been carried out with water and refrigerant R141b at heat fluxes ranging from 1 to 90{\%} of the critical heat flux. The results indicate that correlations which show an inverse relationship between heat transfer coefficient and diameter should not be applied for tubes of less than 6 mm diameter. Conventional pool boiling correlations derived from data acquired from boiling on wires and flat plates yielded acceptable results when applied to the test data from this study.",
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The effect of diameter on boiling heat transfer from the outside of small horizontal tubes. / Kew, P. A.; Houston, S. D.

In: Chemical Engineering Research and Design, Vol. 80, No. 3, 04.2002, p. 278-283.

Research output: Contribution to journalArticle

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AB - Recent studies have suggested that tube diameter is a relevant parameter which should be included when correlating heat transfer data for pool boiling on horizontal tubes. However, there are few data for tubes of diameter less than 8 mm, and the diameter effect for small tubes has not been determined. This paper reports the results of an experimental investigation using tubes of 1-6 mm diameter. Tests have been carried out with water and refrigerant R141b at heat fluxes ranging from 1 to 90% of the critical heat flux. The results indicate that correlations which show an inverse relationship between heat transfer coefficient and diameter should not be applied for tubes of less than 6 mm diameter. Conventional pool boiling correlations derived from data acquired from boiling on wires and flat plates yielded acceptable results when applied to the test data from this study.

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