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Remplacement des frigorigènes HFC par des HC dans un dispositif médical à ultra-basse température : approche expérimentale et simulation.

Refrigerant replacement from HFC to HC in a medical ultra-low temperature appliance: experimental and simulation approach.

Numéro : 2305

Auteurs : HENSE D., KARNOPP J.

Résumé

This work explores the migration of single speed HFC compressor to variable speed HC compressor in a cascade refrigeration circuit for Ultra Low temperature freezer application. In this way, the paper first describes a case study to replace HFC refrigerant pair R404A/R508B by low GWP alternative HC R290/R170. In order to define the best average working condition for the HC pair with variable speed compressors, a semi-empirical model is applied. The results showed that some circuit modifications are important to optimize system performance and keep the HC refrigerant charge below 150g. Experimental data indicated that to take the most advantage of the VCC technology it is paramount to optimize the compressor working speed for given appliance. As a final result the a reduction of 41.5% in energy consumption was obtained and allowed the system to reach 8.6% lower energy consumption than Energy Star target.

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Pages : 9 p.

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Détails

  • Titre original : Refrigerant replacement from HFC to HC in a medical ultra-low temperature appliance: experimental and simulation approach.
  • Identifiant de la fiche : 30030652
  • Langues : Anglais
  • Sujet : Technologie, Alternatives aux HFC
  • Source : 2022 Purdue Conferences. 19th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Date d'édition : 2022

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