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Transfert de chaleur par condensation et évaporation d'un mélange de 1234ze(e) et de R32 dans un tube lisse horizontal.

Condensation and evaporation heat transfer of R1234ze(e)/R32 mixture in a horizontal smooth tube.

Numéro : pap. n. TP-032

Auteurs : MIYARA A., HOSSAIN M. A., AFROZ H. M. M., et al.

Résumé

R1234ze(E)/R32 mixtures are expected as the next generation refrigerant in the field of air-conditioning for domestic and business uses. However, there is still no sufficient data for condensation and evaporation heat transfer coefficient and pressure drop which are required for the design of heat exchanger and the simulation of the new refrigerant. In this experimental study, we have investigated the effect of mass concentration of R32 on R1234ze(E)/R32 mixtures and also compared with near azeotropic mixture R410A for condensation and evaporation heat transfer coefficient. Experiments were carried out for R1234ze(E), R32, R410A and zeotropic mixtures of R1234ze(E) and R32 with mass fractions of 0.55/0.45 and 0.70/0.30. Experiments were done under the conditions of mass fluxes of 49-445 kg-m-2-s-1 and saturation temperatures of 35-45°C for condensation and 5-10°C for evaporation. The condensation heat transfer coefficient of R1234ze(E)/R32 with mass fraction of 0.55/0.45 is comparable with R410A. On the other hand, this mixture shows lower evaporation heat transfer coefficient than that of R410A. In addition, we have compared our experimental results with some conventional correlations.

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Format PDF

Pages : 8 p.

Disponible

  • Prix public

    20 €

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    Gratuit

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Détails

  • Titre original : Condensation and evaporation heat transfer of R1234ze(e)/R32 mixture in a horizontal smooth tube.
  • Identifiant de la fiche : 30008107
  • Langues : Anglais
  • Source : 4th IIR Conference on Thermophysical Properties and Transfer Processes of Refrigerants
  • Date d'édition : 17/06/2013

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