Partager

Estimation du débit d'huile en circulation dans un système à compression de vapeur à l’aide d’un séparateur d’huile placé du côté du refoulement.

Estimation of oil circulation ratio in a vapor compression system using a discharge side oil separator.

Numéro : 2208

Auteurs : HAIDER S. A., SEETON C., MILJKOVIC N., ELBEL S.

Résumé

For vapor compression systems, the standard method for measuring the oil circulation ratio (𝑂𝐶𝑅) is via sampling, as described in the ASHRAE standard 41.4. Sampling is tedious, alters the steady state of the system and can depend on several factors such as refrigerant-oil miscibility and sampling cylinder orientation. Many compressor manufacturers conduct compressor performance tests which rely on hot gas cycles that do not have a liquid line for sampling. They mount oil separators at the compressor discharge to separate the oil flow from the refrigerant flow and use the mass flow rates to estimate real-time 𝑂𝐶𝑅. In a real case, some oil will always escape with the separated refrigerant, and some refrigerant, dissolved in oil, will always escape with the separated oil, significantly reducing the accuracy of the procedure. The present study investigates 𝑂𝐶𝑅 measurements using an oil separator-based approach for a full vapor compression cycle working with R134a and PAG ISO 46 oil. A full cycle allows sampling to also be performed in parallel for validation. Solubility corrections were performed to account for the refrigerant dissolved in the oil returning to the compressor suction. It was found that the 𝑂𝐶𝑅 values from the oil separator-based approach, upon solubility correction, fell within 6% of the sampling results. Discissions were also made on the usefulness of the oil separator efficiency values at the oil and vapor outlet ports for the oil separator-based approach.

Documents disponibles

Format PDF

Pages : 10 p.

Disponible

Gratuit

Télécharger

Détails

  • Titre original : Estimation of oil circulation ratio in a vapor compression system using a discharge side oil separator.
  • Identifiant de la fiche : 30033083
  • Langues : Anglais
  • Sujet : Technologie
  • Source : 2024 Purdue Conferences. 20th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Date d'édition : 17/07/2024

Liens


Voir d'autres communications du même compte rendu (187)
Voir le compte rendu de la conférence

Indexation