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Les limites d'inflammabilité des mélanges azéotropes théoriques composant de R1243zf, RE170 et des retardateurs de flamme (R13I1, R134a ou R227ea).

Flammability limits of theoretical azeotropic mixtures consist of R1243zf, RE170 and flame retardants (R13I1, R134a, or R227ea).

Auteurs : WU X., OU Z., GUAN H., ZHU X., YANG Z., XU S.

Type d'article : Article de la RIF

Résumé

3,3,3-trifluoropropene (R1243zf) is a low climate change effect refrigerant that has great development potential. However, R1243zf is flammable and its safety classification is A2 as per ISO standard 817. To reduce its risk of flammability, the method of using mixed refrigerants in practical applications is an effective approach. In this paper, an experimental system was established according to the ASHRAE standard 34 to measure the flammability limits of four azeotropic mixtures containing R1243zf. First, the critical suppression ratio (CSR) of R13I1/R1243zf was tested out that is 0.353. Further measurements were made to determine the lower flammability limits (LFLs) and critical suppression concentrations (CSCs) of three ternary mixtures consisted of R1243zf, thermodynamic performance enhancer (RE170) and flame retardants (R13I1, R134a or R227ea), at various compositions. The experimental non-flammable proportions of R1243zf/RE170/R13I1, R1243zf/RE170/R134a, and R1243zf/RE170/R227ea were 31.81 %, 5.49 %, and 22.42 %, respectively. Besides, a comparison was made between the experimental data and the predicted results by means of three different theoretical methods (the equal effect method, thermal balance method, and group contribution method). The fresh experimental results will provide practical guidance for the applications that utilize the R1243zf blends in low flammability risk.

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Format PDF

Pages : 208-217

Disponible

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    20 €

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Détails

  • Titre original : Flammability limits of theoretical azeotropic mixtures consist of R1243zf, RE170 and flame retardants (R13I1, R134a, or R227ea).
  • Identifiant de la fiche : 30032223
  • Langues : Anglais
  • Sujet : Alternatives aux HFC
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 159
  • Date d'édition : 03/2024
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2023.12.040

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