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Difficulté de remplacer le R404A par du R290 dans un congélateur pour crèmes glacées en respectant la limite de 150 g de charge en frigorigène.

Challenges on converting an upright ice-cream freezer from R404a to R290 complying with 150g refrigerant charge restriction.

Numéro : pap. 2220

Auteurs : KRUGER J., DE BORBA F. L., FAVARO M.

Résumé

Glass door vertical refrigeration systems for commercial applications located in places with an elevated flux of people throughout the day have a high door opening rate, turning the maintenance of the inner temperatures below -18°C a huge challenge. Usually evaporators with wide surface area are used in order to improve the heat exchange, demanding greater refrigerant charge. Other factors, namely the evaporator’s heat exchange efficiency loss caused by the ice formation between fins and the power supply oscillations, contribute to the system’s capacity losses, affecting the fresh food flavor and preservation time as well as the end customer’s expectation. The present work shows the results obtained through the optimization and conversion of vertical ice-cream freezer from R404a to R290 with limit of 150 g. The use of variable cooling capacity compressor and system component’s optimization were fundamental to reach the operation requirements and maintain the internal temperature even in critical operating conditions as door opening tests, with extra benefit of energy consumption reduction.

Documents disponibles

Format PDF

Pages : 9 p.

Disponible

  • Prix public

    20 €

  • Prix membre*

    15 €

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

Détails

  • Titre original : Challenges on converting an upright ice-cream freezer from R404a to R290 complying with 150g refrigerant charge restriction.
  • Identifiant de la fiche : 30018776
  • Langues : Anglais
  • Source : 2016 Purdue Conferences. 16th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Date d'édition : 11/07/2016

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