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Étude expérimentale sur un congélateur basse température à -40 °C utilisant un système frigorifique à éjecteur-détendeur.

Experimental investigation on a -40 °C low-temperature freezer using ejector-expansion refrigeration system.

Auteurs : LU Y., BAI T., YU J.

Type d'article : Article de la RIF

Résumé

The ejector-expansion freezer refrigeration system (ERS) has been proposed to recover part of the expansion work in the throttling process and improve cycle efficiency. In this paper, the performance characteristics of a -40 °C low-temperature freezer adopted with the standard ERS are experimentally investigated under various operating conditions, and several important parameters are also examined in detail. Additionally, the performance of the freezer prototype is compared between using the ERS and a conventional vapor compression freezer refrigeration system (CRS). The experimental results show that the lower evaporation temperature can be obtained by ERS, the pressure lift ratio of ejector can reach more than 1.25, the compressor compression ratio and power consumption are reduced due to the effective pressure lifting effect of the ejector. Furthermore, when the ambient temperature is 20/25/32 °C, the maximum refrigeration capacity and COP of the ERS based prototype can be improved by 17.0% and 15.9%, respectively. Meanwhile, the energy consumption of ERS can be reduced by 6.2%, 21.7% and 38.9% compared to that of the CRS based prototype, respectively. This validate that the ERS offers a significant energy-saving potential to low-temperature freezers.

Documents disponibles

Format PDF

Pages : 230-237

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 : Experimental investigation on a -40 °C low-temperature freezer using ejector-expansion refrigeration system.
  • Identifiant de la fiche : 30027713
  • Langues : Anglais
  • Sujet : Technologie
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 118
  • Date d'édition : 10/2020
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2020.06.010

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