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Evaluation expérimentale de l'échangeur de chaleur interne dans une installation frigorifique transcritique au CO2.

Experimental evaluation of the internal heat exchanger in a transcritical CO2 refrigeration plant.

Auteurs : SÁNCHEZ D., LLOPIS R., CABELLO R., et al.

Résumé

This work analyses, from an experimental approach, the internal heat exchanger (IHX) effect on a CO2 refrigeration plant operating in transcritical conditions. The analysis is based on the plant's performance comparison when operating with and without IHX under similar working conditions. A number of 60 experimental tests distributed at two evaporating levels (-10 and -15ºC), at two gas cooler outlet temperatures each (31 and 34ºC) and for a wide range of gas cooler pressures (74.4 to 105.9 bar) were performed. The first part of the paper analyses the thermal effectiveness of the IHX for the different operating conditions and presents a relation for its effectiveness estimation. The second part focuses on the influence the IHX will have on the energetic performance of the plant. The results show a maximum increment on the cooling capacity of 10% and on COP of 11% when this element is used. Moreover, an increment up to 12ºC in compressor discharge temperature has been measured when working at -15ºC of evaporating temperature.

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  • 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 : Experimental evaluation of the internal heat exchanger in a transcritical CO2 refrigeration plant.
  • Identifiant de la fiche : 2011-0086
  • Langues : Anglais
  • Source : IIR/Eurotherm sustainable refrigeration and heat pump technology conference. Proceedings of the Eurotherm Seminar No. 88, Stockholm, Sweden, June 13-16, 2010.
  • Date d'édition : 13/06/2010

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