Répartition optimale de la surface de condensation lors de conversions.

Optimal distribution of condenser area for retrofits.

Résumé

Test results from field retrofit situations, where R22 has been changed to Isceon 59 and R407C in two identical chillers, shows that both substitutes require more subcooling than R22 to give the system a satisfying performance. To achieve the same efficiency, COP2, with Isceon 59 as with R22, one had to add approximately 25 per cent more refrigerant. A computer model of a system consisting of coaxial heat exchangers, with refrigerant in the inner tubes, has been made. In the model five R22 substitutes (R134a, propane, R404A, R407C and Isceon 59) and R22 were compared. Areas for subcooling are studied, as are refrigerant amounts.

Détails

Titre original : Optimal distribution of condenser area for retrofits.
Identifiant de la fiche : 1999-3362
Langues : Anglais
Source : Proceedings of the 1998 Purdue International Refrigeration Conference.
Date d'édition : 14/07/1998
Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

Liens

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Indexation

Thèmes : HCFC;
HFC;
Hydrocarbures;
Mélanges
Mots-clés : Circuit frigorifique; R407C; R134a; R404A; R22; Sous-refroidissement; Propane; Performance; Conversion; Charge en frigorigène