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Optimisation de la performance d’un éjecteur à tuyère variable dans un système frigorifique solaire.

Performance optimization for a variable throat ejector in a solar refrigeration system.

Auteurs : YEN R. H., HUANG B. J., CHEN C. Y., et al.

Type d'article : Article, Article de la RIF

Résumé

In a solar vapor ejector refrigeration system, the solar heat supply may vary because of variations in solar irradiation intensity, making it difficult to maintain a steady generator temperature. To improve ejector performance, this study proposes a variable throat ejector (VTEJ) and analyzes its performance using CFD simulations. The following conclusions can be drawn. An ejector with a greater throat area and larger solar collector allows a wider operating range of generator temperatures, but may be overdesigned and expensive. Conversely, decreasing the throat area limits the operating range of generator temperatures. Thus the ejector with a fixed throat area may be unsuitable to use solar energy as a heat source. For a VTEJ, this study derives a curve-fitting relationship between the optimum throat area ratio and the operating temperatures. Using this relationship to adjust the throat area ratio, the ejector can consistently achieve optimal and stable performances under a varying solar heat supply.

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Format PDF

Pages : 1512-15020

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    20 €

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Détails

  • Titre original : Performance optimization for a variable throat ejector in a solar refrigeration system.
  • Identifiant de la fiche : 30008155
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 36 - n. 5
  • Date d'édition : 08/2013

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