Partager

Document IIF

Caractéristiques de la vitesse de l'écoulement d'air à l'intérieur de palettes munies de ventilation chargées à bord d'un véhicule frigorifique avec ou sans gaines d'air.

Air velocity characteristics within vented pallets loaded in a refrigerated vehicle with and without air ducts.

Auteurs : MOUREH J., TAPSOBA S., DERENS E., et al.

Type d'article : Article, Article de la RIF

Résumé

During transport using refrigerated vehicles, this being a vital link in the cold chain, the maintaining of even temperature throughout the cargo is essential in order to preserve the quality, safety and shelf life of perishable food. Within the refrigerated container, the temperature level and its homogeneity are directly governed by airflow patterns. The design of the air-distribution system should allow these airflows to compensate heat fluxes exchanged through the insulated walls or generated by the products. In this paper, a reduced-scale model and CFD predictions were used to investigate experimentally and numerically the airflow patterns within a typical refrigerated truck configuration loaded with vented pallets filled with spherical objects. The experiments were carried out using a laser Doppler velocimetry and thermal sphere-shaped probes located inside the pallets. The aim was to investigate air velocity characteristics above and within pallets. The performance of ventilation was characterized with and without supply air duct systems. Both configurations are extensively used in refrigerated transport. Full-scale measurements were also performed within a load of fruit during transport in a refrigerated truck in order to evaluate the temperature distribution under given operating conditions. The numerical modelling of airflow was performed using the computational fluid dynamics fluent code and the Reynolds stress model (RSM) turbulence model. Numerical and experimental data make it possible to evaluate the air ventilation levels and their heterogeneity between the pallets. The numerical predictions show reasonable agreement with experimental data. The studied supply air duct system improves significantly the homogeneity of ventilation in the vehicle.

Documents disponibles

Format PDF

Pages : 220-234

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 : Air velocity characteristics within vented pallets loaded in a refrigerated vehicle with and without air ducts.
  • Identifiant de la fiche : 2009-0866
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 32 - n. 2
  • Date d'édition : 03/2009

Liens


Voir d'autres articles du même numéro (16)
Voir la source

Indexation