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Analyse numérique pour comparaison de performance entre éjecteur hybride et systèmes frigorifiques conventionnels.

Numerical analysis for performance comparison between hybrid ejector and conventional refrigeration systems.

Numéro : 210032

Auteurs : YOSHIDA T., ELBEL S.

Résumé

Recently, the utilization of low-grade thermal energy has gained increased attention as an attractive opportunity to save energy. Heat driven ejector refrigeration systems are among a number of promising solutions for utilizing thermal energy from waste heat. However, the main drawbacks of this system are low efficiency at off-design conditions and difficult controllability. Hybrid ejector refrigeration system is a promising solution for overcoming these drawbacks. In this system, a booster compressor is installed in order to improve the efficiency for a wide range of conditions and substantially improve controllability. In this study, a numerical efficiency analysis for hybrid refrigeration ejector system is performed and compared with conventional ejector system and vapor compression system. The investigations are focused on chilled water supply conditions (evaporation temperature is 5 °C) at various ambient temperature conditions ranging from 15 °C to 35°C. The seasonal performances in Tokyo and Los Angeles for each system are compared. R1234ze(E), which is a promising low-GWP refrigerant, is used in the system. The calculation results show that the hybrid system performance is 142 % higher than ejector system, 16 % higher than vapor compression system in Tokyo, and 86 % higher than ejector system, 21 % higher than vapor compression system in Los Angeles at summer conditions. Therefore, this study clearly demonstrates the potential of the hybrid ejector system.

Documents disponibles

Format PDF

Pages : 7

Disponible

  • Prix public

    20 €

  • Prix membre*

    15 €

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Numerical analysis for performance comparison between hybrid ejector and conventional refrigeration systems.
  • Identifiant de la fiche : 30028604
  • Langues : Anglais
  • Sujet : Technologie
  • Source : 2021 Purdue Conferences. 18th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Date d'édition : 05/2021
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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