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The influence of a low viscosity oil on the pool boiling heat transfer of the refrigerant R507.

Author(s) : MOHRLOK K., SPINDLER K., HAHNE E.

Type of article: Article, IJR article

Summary

The paper describes the influence of a low viscosity polyolester based lubricating oil on the pool boiling heat transfer of the R507. The pool boiling heat transfer coefficients for this refrigerant-oil mixture are measured on a smooth tube and on an enhanced tube. The investigation is made for oil mass fractions up to 10% for both and for saturation temperatures between -28.6 and 20.1 °C. For the smooth tube the heat transfer increases for increasing oil mass fractions up to 3% at lower saturation temperatures. At higher saturation temperatures the heat transfer decreases for increasing oil mass fractions tubes. For oil mass fractions greater than 1% at the higher saturation temperatures a range of decreasing heat transfer coefficient is found for increasing heat flux. The effect is caused by the different miscibility of the oil and the components of the refrigerant mixture.

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Pages: 25-40

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Details

  • Original title: The influence of a low viscosity oil on the pool boiling heat transfer of the refrigerant R507.
  • Record ID : 2001-1749
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 24 - n. 1
  • Publication date: 2001/01

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