Cawte, H.
September 1996
Fuel and Energy Abstracts, vol 37-5, p. 377
An investigation has been made into the effect of oil concentration on evaporation heat transfer coefficients in refrigerant-oil mixtures flowing in a horizontal tube. A new correlation is presented for heat transfer coefficients in convective evaporation of refrigerant-oil mixtures that predicts the results of the present study within approximately +/- 20%. Reports measurements of evaporation heat transfer coefficient in refrigerants R12 and R22, both oil-free and with two concentrations of Shell Clavus 32 oil.
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