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Evaluation des caractéristiques d’inflammabilité des mélanges de frigorigénes R134a/R1270, R134a/R170 et R170/R1270.

Evaluation of flammability characteristics of mixed refrigerants R134a/R1270, R134a/R170, and R170/R1270.

Auteurs : ZHANG Z., HE G., NING Q., WANG Z., YANG W., HUA J., ZHOU S.

Type d'article : Article de la RIF

Résumé

Hydrocarbons (HCs) are considered promising alternative refrigerants due to their excellent thermodynamics, transport properties, and environmental friendliness. However, hydrocarbons are flammable. Conversely, R134a is a widely used non-flammable refrigerant but was listed in the Montreal Protocol-Kigali Amendment due to its relatively high global warming potential (GWP). Therefore, in order to reduce the GWP of R134a and inhibit the flammability of hydrocarbon refrigerants, this study investigated the flammability characteristics of mixed refrigerants R134a/R1270, R134a/R170, and R170/R1270. The flammability limits of different concentrations of R170/R1270, R134a/R1270, and R134a/R170 were measured under standard conditions, and the inhibition
mechanism of R134a was briefly analyzed. Additionally, the flammability limits of R170/R1270, R134a/R1270, and R134a/R170 were predicted using the polynomial fitting method. Subsequently, the flame propagation speed and the flame color of R1270 and R170, with and without R134a, were compared and analyzed. Furthermore, the cycle performance of R134a/HCs was calculated. The research results are expected to provide guidance for the safe and effective utilization of R1270, R170, and their mixtures in refrigeration systems.

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Format PDF

Pages : p. 1-11

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Evaluation of flammability characteristics of mixed refrigerants R134a/R1270, R134a/R170, and R170/R1270.
  • Identifiant de la fiche : 30032036
  • Langues : Anglais
  • Sujet : Alternatives aux HFC
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - Vol. 156
  • Date d'édition : 12/2023
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2023.09.013

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