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Transfert de chaleur du dioxyde de carbone lors de l'ébullition libre : état de l'art.

Review on pool boiling heat transfer of carbon dioxide.

Auteurs : GORENFLO D., KOTTHOFF S.

Type d'article : Article, Article de la RIF

Résumé

Although application of carbon dioxide as working fluid in many fields of refrigeration technology has been recommended very often in recent past, the data on nucleate boiling heat transfer of carbon dioxide in free convection are very scarce in the open literature and new investigations are almost entirely focussed on forced convective flow boiling. In the interpretation of the respective results, heat transfer to carbon dioxide is often characterized as being superior to other refrigerants due to the outstandingly favourable thermophysical properties of carbon dioxide for boiling heat transfer. Different from this view, the discussion of recent results on pool boiling heat transfer of carbon dioxide in this review demonstrates that the high heat transfer coefficients measured for carbon dioxide in comparison to hydrocarbon or halocarbon refrigerants are mainly due to the fact that application of carbon dioxide is mostly envisaged for conditions where reduced saturation pressure is higher than for common refrigerants. In the first part of the review, the three main influences, by heat flux, saturation pressure and fluid properties, on pool boiling of carbon dioxide are discussed using recent measurements for CO2 by Kotthoff et al. and other organic substances. In the second part, a comparison is given with the few former data available and with new results of Loebl and Kraus on the influence of the heating wall (material and surface roughness). Finally, analogies between nucleate pool boiling and new flow boiling data are shown for those domains of flow boiling in which nucleation provides the dominant contribution to heat transfer and convective effects are of secondary importance.

Documents disponibles

Format PDF

Pages : 1169-1185

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Review on pool boiling heat transfer of carbon dioxide.
  • Identifiant de la fiche : 2006-0664
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 28 - n. 8
  • Date d'édition : 12/2005

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