Partager

Document IIF

Mélanges de frigorigènes à haut glissement de température dans les pompes à chaleur à haute température : Partie 2 – Détermination en ligne de la composition des mélanges binaires.

High-glide refrigerant blends in high-temperature heat pumps: Part 2 – Inline composition determination for binary mixtures.

Auteurs : BRENDEL L. P. M., BERNAL S. N., HEMPRICH C., ROWANE A. J., BELL I. H., ROSKOSCH D., ARPAGAUS C., BARDOW A., BERTSCH S. S.

Type d'article : Article de la RIF

Résumé

Refrigerant mixtures are frequently used in air-conditioners and heat pumps. However, mixtures with high glides of 30 K and more during evaporation are rare, partially because there is an increased concern about composition shifts within the system. An easy and reliable inline composition measurement could alleviate these concerns and simplify the handling of systems with high-glide mixtures. This study investigates six composition determination methods, which are all non-invasive, five of which can be conducted during system operation. All methods were applied to all available mixtures in a dataset of 380 data points. The binary and ternary mixtures tested consist of the refrigerants R-1233zd(E), R-1336mzz(Z), R-1234yf, R-1224yd(Z), and R-32. Each method was applied to all datapoints collected with a certain refrigerant mixture at varying operating conditions. The average of the calculated mass fraction was then compared to the manually charged mass fraction. For the density method, this difference of the calculated and measured mass fraction was always less than 0.03 and usually smaller than 0.01 across all tested mixtures. Most other methods performed well with deviations typically less than 0.05. Some of the methods require only low-cost sensors like thermocouples and pressure transducers. Property data of ternary mixtures is also discussed in the study but a composition determination, theoretically possible combining any two of the six methods, is not attempted in this study.

Documents disponibles

Format PDF

Pages : 45-57

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

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

Détails

  • Titre original : High-glide refrigerant blends in high-temperature heat pumps: Part 2 – Inline composition determination for binary mixtures.
  • Identifiant de la fiche : 30032436
  • Langues : Anglais
  • Sujet : Technologie
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 165
  • Date d'édition : 09/2024
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2024.05.012

Liens


Voir d'autres articles du même numéro (39)
Voir la source

Indexation