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Transfert de chaleur par ébullition en écoulement de HFO-1234ze(E) à l’intérieur d’un tube à micro-ailettes de 4 mm de diamètre extérieur.

HFO-1234ze(E) flow boiling heat transfer inside a 4.0 mm OD microfin tube.

Numéro : pap. n. 1171

Auteurs : DIANI A., ROSSETTO L.

Résumé

The paper reports experimental results about HFO-1234ze(E) flow boiling inside a microfin tube with an outer diameter of 4.0 mm. Tests were carried out for vapour qualities from 0.10 to 0.95, mass velocities from 200 to 755 kg m-2 s-1, heat fluxes from 10 to 50 kW m-2, with saturation temperatures at the inlet of the test section of 15, 20 and 25 °C. From the experimental measurements, it has been possible to calculate the heat transfer coefficient and to measure the pressure drop. Present data, together with experimental data previously obtained at 30°C of saturation temperature, permitted to understand how each working parameter affects the thermal and hydraulic behaviour of the tube during HFO-1234ze(E) flow boiling. The experimental heat transfer coefficients and frictional pressure drops were also compared against values predicted by empirical correlations available in the literature.

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Pages : 9

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Détails

  • Titre original : HFO-1234ze(E) flow boiling heat transfer inside a 4.0 mm OD microfin tube.
  • Identifiant de la fiche : 30024868
  • Langues : Anglais
  • Source : 1st IIR international conference on the application of HFO refrigerants, Birmingham, September 2-5 2018.
  • Date d'édition : 09/2018
  • DOI : http://dx.doi.org/10.18462/iir.hfo.2018.1171

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