Performance of micro-fin tubes with refrigerant-22 and oil mixtures Academic Article uri icon


  • This project investigated the effects of oil on evaporation and condensation of Refrigerant-22 in smooth and augmented tubes. The presence of oil does affect the heat transfer and pressure drop, often (but not always) in a negative direction. The effect of oil can be different in smooth and augmented tubes. However, the magnitude of its effect in augmented tubes is usually within a few percentage points of its magnitude in smooth tubes. The advantage of micro-fin tubes relative to smooth and low-fin tubes with pure refrigerant is maintained with refrigerant-oil mixtures.

published proceedings

  • ASHRAE Journal

author list (cited authors)

  • Schlager, L. M., Pate, M. B., & Bergles, A. E.

complete list of authors

  • Schlager, LM||Pate, MB||Bergles, AE

publication date

  • November 1989