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Document IIF

Analyse expérimentale de l'influence des conditions de fonctionnement sur la performance (COP et efficacité de l'éjecteur) d'une pompe à chaleur au R744 avec un éjecteur monophasique.

Experimental analysis of the influence of operating conditions on the performance (COP and ejector efficiency) of R744 heat pump with one-phase ejector.

Numéro : pap. ID163

Auteurs : XIONG J., EIKEVIK T. M., WANG R., et al.

Résumé

Ejector is increasingly utilized for expansion recovery of low grade heat to produce additional cooling effect. The R744 heat pump with one-phase ejector applies pump which requires quite insignificant work input, instead of compressor. Experimental investigations of the optimum operating conditions were performed. Different operating conditions, including the inlet temperature and pressure of the ejector (high-side temperature and pressure) were examined respectively. Based on the experimental results over a wide range of temperatures and pressures, the influences of high-side temperature and pressure on the mass entrainment ratio, overall COP, actual COP and ejector efficiency were obtained. The best performance was attained with the temperature of around 75°C and pressure of around 85 bar under certain ejector geometry and fixed evaporator of 51 bar and condensing pressure of 58 bar.

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Format PDF

Pages : 8 p.

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  • Prix public

    20 €

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    Gratuit

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Détails

  • Titre original : Experimental analysis of the influence of operating conditions on the performance (COP and ejector efficiency) of R744 heat pump with one-phase ejector.
  • Identifiant de la fiche : 30012389
  • Langues : Anglais
  • Source : 11th IIR Gustav Lorentzen Conference on Natural Refrigerants (GL2014). Proceedings. Hangzhou, China, August 31-September 2, 2014.
  • Date d'édition : 02/08/2014

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