Share

Study of the thermophysical properties of POE oil and R-290 mixtures.

Etude des propriétés thermophysiques de mélanges huile POE/R-290.

Author(s) : CHARNI M., TERRIER M. F., TOUBLANC C., et al.

Type of article: Article

Summary

Hydrocarbons are possible alternatives to CHFCs and HFCs in order to reduce impacts of refrigeration and air conditioning on the environment. The phase behavior study of a refrigerant and lubricant mixture is essential for the optimal design of systems. Measurements of the thermophysical properties of mixtures such as miscibility, solubility and viscosity are then to be performed to allow for the choice of a lubricant. Solubility of refrigerants in mineral oils is higher for hydrocarbons than for R22. The paper presents experimental results for two POE (IS068 and IS032) oil mixtures R290 – an R22 potential substitute in a temperature range from -20 °C to 60 °C. Results are compared with a standard R22/mineral IS032 mixture. Static measurements show a limit of miscibility for this reference that is not observed in both R290-based pairs. Some thermodynamic mixture properties, like enthalpy, are modelled using the measurements of oil/refrigerant mixture solubility. A representation of the enthalpy diagram taking into account a defined oil circulation rate (OCR) is presented. Consequences on cooling capacity of residual refrigerant dissolution in oil leaving the evaporator are also discussed.

Details

  • Original title: Etude des propriétés thermophysiques de mélanges huile POE/R-290.
  • Record ID : 30011902
  • Languages: French
  • Source: Revue générale du Froid & du Conditionnement d'air - vol. 103 - n. 1144
  • Publication date: 2014/06

Links


See other articles in this issue (4)
See the source

Indexing