Partager

Évaluation expérimentale d'un échangeur de chaleur interne dans un cycle frigorifique sous-critique au CO2 avec refroidisseur de gaz.

Experimental evaluation of an internal heat exchanger in a CO2 subcritical refrigeration cycle with gas-cooler.

Auteurs : LLOPIS R., SANZ-KOCK C., CABELLO R., et al.

Type d'article : Article

Résumé

We present the experimental evaluation of an internal heat exchanger or suction-line/liquid-line heat exchanger in a CO2 subcritical refrigeration plant with gas-cooler. The plant, driven by a 1.5 kW CO2 semi hermetic compressor, uses brazed plate heat exchangers as condenser, evaporator and internal heat exchanger, an air finned tube gas-cooler and an electronic expansion valves. The evaluation (77 steady-states) covers evaporating temperatures from -40 to -25 °C and condensing temperatures from -15 to 0 °C, always at the nominal speed of the compressor. Here, the effect of the internal heat exchanger on the main energy parameters is analysed, i.e., cooling capacity, COP and heat rejection at gas-cooler and condenser. Also, the effect of the internal heat exchanger in a cascade cycle is analysed theoretically. It has been concluded that the internal heat exchanger does not improve the performance of the subcritical cycle, but it could improve the energy performance if it is used inside a cascade refrigeration system.

Détails

  • Titre original : Experimental evaluation of an internal heat exchanger in a CO2 subcritical refrigeration cycle with gas-cooler.
  • Identifiant de la fiche : 30015765
  • Langues : Anglais
  • Source : Applied Thermal Engineering - vol. 80
  • Date d'édition : 05/04/2015
  • DOI : http://dx.doi.org/10.1016/j.applthermaleng.2015.01.040

Liens


Voir d'autres articles du même numéro (6)
Voir la source

Indexation