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Document IIF

Modélisation de l’ordre réduit pour les échangeurs de chaleur à tubes à ailettes multi-circuits avec plusieurs types de circuits identiques.

Reduced order modeling for multi-circuit fin-and-tube heat exchangers with multiple identical circuit types.

Auteurs : SARFRAZ O., BACH C. K., BRADSHAW C. R.

Type d'article : Article, Article de la RIF

Résumé

Fin-and-tube heat exchangers are widely used in vapor compression systems for the heating, ventilation, and air-conditioning applications. There are numerous fin-and-tube heat exchanger models described in literature with some considering techniques to reduce the overall simulation time. A technique that can help reduce the simulation time in fin-and-tube heat exchangers is the reduction in the identical circuits by leveraging symmetry that typically exists in fin-and-tube heat exchangers. An algorithm is developed in this paper that finds the identical circuits in the heat exchanger to allow a user to leverage this symmetry. A parametric study is conducted by simulating different number of identical circuits in a multi-circuit heat exchanger using 2 different i.e. detailed and reduced order segment-by- segment models that can account for cross-fin conduction between the neighboring tubes of the heat exchanger. The capacity and simulation time for different number of simulated circuits is compared to when all circuits are simulated in a multi-circuit heat exchanger. The result show that the inclusion of reduced number of identical circuits instead of all circuits re-sulted in more than 70% reduction in simulation time for both the models with less than 3% difference in capacity. The simulation of only 5 out of 23 identical circuits in an air-to-water coil using reduced order model resulted in less than 1% of the simulation time and less than 3% difference in capacity relative to the detailed segment-by-segment model with all circuits simulated.

Documents disponibles

Format PDF

Pages : 236-247

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 : Reduced order modeling for multi-circuit fin-and-tube heat exchangers with multiple identical circuit types.
  • Identifiant de la fiche : 30026828
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 106
  • Date d'édition : 10/2019
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2019.06.015

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