SURVEY OF REFRIGERANT HEAT TRANSFER AND PRESSURE DROP EMPHASIZING OIL EFFECTS AND IN-TUBE AUGMENTATION.
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Compressor lubricating oil is always present in some amount in vapor compression refrigeration systems. A literature survey of the effects of oil on the heat transfer and pressure drop of condensing and evaporating refrigerants is presented. Emphasis is placed on refrigerant-oil mixtures flowing in tubes, but pool boiling, vapor space condensation, and adiabatic pressure drop papers are also covered. Scant literature appears regarding refrigerant-oil mixtures in enhanced tubes, so a review of pure refrigerant condensation and evaporation in tubes using passive enhancement techniques is included.
author list (cited authors)
Schlager, L. M., Pate, M. B., & Bergles, A. E.