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Modélisation algébrique et conception thermodynamique d'évaporateurs à tubes à ailettes alimentés par un ventilateur et fonctionnant sous conditions de givrage.

Algebraic modeling and thermodynamic design of fan-supplied tube-fin evaporators running under frosting conditions.

Auteurs : RIBEIRO R. S., HERMES C. J. L.

Type d'article : Article

Résumé

In this study, the method of entropy generation minimization (i.e., design aimed at facilitating both heat, mass and fluid flows) is used to assess the evaporator design (aspect ratio and fin density) considering the thermodynamic losses due to heat and mass transfer, and viscous flow processes. A fully algebraic model was put forward to simulate the thermal-hydraulic behavior of tube-fin evaporator coils running under frosting conditions. The model predictions were validated against experimental data, showing a good agreement between calculated and measured counterparts. The optimization exercise has pointed out that high aspect ratio heat exchanger designs lead to lower entropy generation in cases of fixed cooling capacity and air flow rate constrained by the characteristic curve of the fan.

Détails

  • Titre original : Algebraic modeling and thermodynamic design of fan-supplied tube-fin evaporators running under frosting conditions.
  • Identifiant de la fiche : 30012300
  • Langues : Anglais
  • Source : Applied Thermal Engineering - vol. 70 - n. 1
  • Date d'édition : 09/2014
  • DOI : http://dx.doi.org/10.1016/j.applthermaleng.2014.05.012

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