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Évaluation d’un échangeur de chaleur « liquide à l’aspiration » utilisant de nouveaux frigorigènes synthétiques en remplacement du R-134a.

Liquid-to-suction heat exchanger assessment using new synthetic refrigerants to replace R-134a.

Numéro : pap. n. 265

Auteurs : MOTA BABILONI A., NAVARRO-ESBRÍ J., MATEU-ROYO C., et al.

Résumé

The liquid-to-suction heat exchanger (LSHX) is a component added to vapor compression systems that can increase the cooling capacity (CC) and coefficient of performance (COP), depending on the working fluid and operating conditions. This paper evaluates its influence of when hydrofluorolefins (HFOs) and their mixtures are used in typical R-134a operating conditions. Attending to criteria and correlations, the LSHX improves COP for all fluids except for R-152a, presenting the alternatives better results than R-134a. From a theoretical point of view, the LSHX improves less the COP, but the ranking of refrigerants is the same. Then, when tested in an experimental setup with plate LSHX, COP increases are observed but lower those predicted, and the HFO/HFC mixture R-513A is more benefited than the greenhouse gas R-134a. According to these results, the utilization of the LSHX is advisable with new HFO/HFC mixtures in existing or new design refrigeration installations.

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Pages : 8

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    20 €

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Détails

  • Titre original : Liquid-to-suction heat exchanger assessment using new synthetic refrigerants to replace R-134a.
  • Identifiant de la fiche : 30025977
  • Langues : Anglais
  • Source : Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Date d'édition : 24/08/2019
  • DOI : http://dx.doi.org/10.18462/iir.icr.2019.0265

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