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Experimental investigations of CO2 trans-critical refrigeration system with and without internal heat exchanger for warm climate.

Études expérimentales d’un système frigorifique au CO2 transcritique avec et sans échangeur de chaleur interne sous un climat chaud.

Numéro : pap. 1337

Auteurs : PUROHIT N., GUPTA D. K., DASGUPTA M. S.

Résumé

In this article, performance of a CO2 trans-critical refrigeration system is experimentally investigated within temperature range 32°C to 45°C, with and without internal heat exchanger. The experiments are conducted for two different evaporator temperatures, 0°C and -5°C, in each, case for four different ambient temperatures 32°C, 35°C, 40°C and 45°C, for a range of gas cooler pressures. The investigation also covers effect of fan speed on cycle performance for air flow velocity ranging 1 to 3 m·s-1 over the gas cooler. The experimental study brings out varying level of performance enhancement due to the internal heat exchanger. For the high ambient operation (45°C), the maximum enhancement observed for COP is 5.7% at -5°C evaporator temperature, while the same is found 5.01% at 0°C evaporator temperature, for suitable air flow velocity near 1 m·s-1. A rise in compressor discharge temperature is also recorded when internal heat exchanger is used.

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Pages : 8

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Détails

  • Titre original : Experimental investigations of CO2 trans-critical refrigeration system with and without internal heat exchanger for warm climate.
  • Identifiant de la fiche : 30023678
  • Langues : Anglais
  • Source : 13th IIR Gustav Lorentzen Conference on Natural Refrigerants (GL2018). Proceedings. Valencia, Spain, June 18-20th 2018.
  • Date d'édition : 18/06/2018
  • DOI : http://dx.doi.org/10.18462/iir.gl.2018.1337

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