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Étude de l’impact des frigorigènes à faible PRP et à densité réduite dans un compresseur à spirale à usage commercial fonctionnant au R410A.

Investigation of the impact of reduced density low-GWP refrigerants in a commercial R-410A scroll compressor.

Numéro : 1458

Auteurs : TYRA G. A., SHAHZAD Y., BRADSHAW C. R.

Résumé

With the recent legislation passed to reduce the effect emissions have on global temperatures causing the phase out of current third generation refrigerants, the industry has focused on creating equipment based on the fourth generation with a focus on low global warming potential. Research is needed to understand how components react when these new low GWP refrigerants are used, particularly in compressors. This work quantifies the impact in compressors with an experimental analysis of R-1234yf and R-444A in a 40-ton commercial scroll compressor that was designed for R-410A, using test data collected from a hot-gas bypass compressor load stand. Tests were performed for saturated suction temperatures ranging from 20 °F (-6.67 °C) to 60 °F (15.56 °C), saturated discharge temperatures from 80 °F (26.67 °C) to 120 °F (48.49 °C), shaft speeds from 45 Hz to 60 Hz, and superheats from 10 °F (5.56 °C) to 30 °F (16.67 °C) for a total of 22 data points for each compressor. Results show that R-410A performs significantly better in the scroll compressor than both R-1234yf and R-444A, while R-444A had a better compressor efficiency than R-1234yf, but a decrease in overall system performance. At peak performance, R-410A had an isentropic efficiency of 74.7% and a 𝐶𝑂𝑃 of 4.22, R-1234yf had an efficiency of 64.5% and a 𝐶𝑂𝑃 of 3.8, while R-444A had an efficiency of 66.6% and the lowest 𝐶𝑂𝑃 of 2.4.

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Pages : 10

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Détails

  • Titre original : Investigation of the impact of reduced density low-GWP refrigerants in a commercial R-410A scroll compressor.
  • Identifiant de la fiche : 30033619
  • Langues : Anglais
  • Sujet : Réglementation
  • Source : 2024 Purdue Conferences. 27th International Compressor Engineering Conference at Purdue.
  • Date d'édition : 18/07/2024

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