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Pool boiling heat transfer to hydrocarbons and ammonia: a state-of-the-art review.

Author(s) : KOTTHOFF S., GORENFLO D.

Type of article: Article, IJR article, Review

Summary

Interest has grown in recent years to extend the use of hydrocarbons and ammonia as working fluids in refrigeration to new domains of application, despite their flammability. In the context of pool boiling heat transfer, this has created increasing research activities, particularly with regard to hydrocarbons. In contrast with this, only a few new experimental results have been added to the data set existing for ammonia in the literature. This review concentrates on hydrocarbons, while ammonia will be treated in a comparatively brief part. The review starts with the state-of-the-art that had been reached at about 1990. It continues with the data set for propane being taken as an example to highlight various reasons for the experimental data scatter that is found when different sources are compared for the same substance. In the main part, new results of 12 (aliphatic) hydrocarbons are discussed regarding the influence of heat flux and reduced saturation pressure on the heat transfer coefficient. It is shown that the dependencies of the heat transfer coefficient on heat flux and reduced pressure, and on the thermophysical properties of the various fluids at constant values can be correlated by general semi-empirical functions with comparatively narrow limits of error that do not reach far beyond the experimental scatter occurring when different sources are compared for the same substance. Before treating ammonia in a final section, the review on hydrocarbons closes with short discussions for mixtures of hydrocarbons, for the bundle effect, and for the behaviour of enhanced tubes.

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Format PDF

Pages: 573-602

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Details

  • Original title: Pool boiling heat transfer to hydrocarbons and ammonia: a state-of-the-art review.
  • Record ID : 2008-1558
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 31 - n. 4
  • Publication date: 2008/06

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