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Document IIF

Optimisation d’un échangeur de chaleur à tubes et calandre à base de coulis de glace. 

Optimization of a shell-and-tube heat exchanger based on ice slurry.

Numéro : 0025

Auteurs : HANI R., PONCET S., MONNEY D.

Résumé

In this study, one develops a simple analytical model to quantify the performance of shell and tube heat exchangers working with ice slurries. The Matlab code is based on the ɛ NTU method to determine the heat transfer rates. To better capture the pressure drop distribution, the emphasis is put on the modeling of the rheological behavior of the slurries. Rheograms have been then first obtained by a hybrid rheometer for ethylene glycol based ice slurries over a wide range of ice fraction (5 65%). The model is then favorably compared in terms of pressure drop and overall heat transfer coefficient with the experimental data of Renaud Boivin et al. (2012). It besides improves the former predictions of these authors using a simpler analytical model. The model is extended to perform a parametric analysis of the hydrodynamic behavior and heat transfer in a second shell and tube heat exchanger by varying the ice fraction (up to 25%) and the ice slurry Reynolds number (up to 2×104). While the heat exchanger effectiveness increases by increasing the ice fraction, the efficiency index gathering the Nusselt number and pressure drop referring to the base case without ice remains always below 1. There is then no benefit from using ice slurry compared to pure water. The same heat exchanger is finally optimized using the fmincon algorithm. The optimal geometry enables to improve the efficiency index by 17.7% and the heat exchanger effectiveness by 11.5%.

Documents disponibles

Format PDF

Pages : 8 p.

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 : Optimization of a shell-and-tube heat exchanger based on ice slurry.
  • Identifiant de la fiche : 30032378
  • Langues : Anglais
  • Sujet : Technologie
  • Source : 14th IIR Conference on Phase-Change Materials and Slurries for Refrigeration and Air Conditioning. Proceedings:  Paris France, May 29-31, 2024.
  • Date d'édition : 31/05/2024
  • DOI : http://dx.doi.org/10.18462/iir.pcm.2024.0025

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