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Heat transfer coefficients and pressure drops for R134a and an ester lubricant mixture in a smooth tube and a micro-fin tube.

Author(s) : ECKELS S. J., DOERR T. M., PATE M. B.

Summary

The experimental results show that the micro-fin tube has distinct performance advantages over the smooth tube. The average heat transfer coefficients during evaporation and condensation in the micro-fin tube were 50 to 200% higher than those for the smooth tube, while the average pressure drops were on average only 10 to 50% higher. The experimental results indicate that the presence of a lubricant degrades the average heat transfer coefficients.

Details

  • Original title: Heat transfer coefficients and pressure drops for R134a and an ester lubricant mixture in a smooth tube and a micro-fin tube.
  • Record ID : 1999-2832
  • Languages: English
  • Source: ASHRAE Transactions. 1998 Winter Meeting, San Francisco, CA.
  • Publication date: 1998
  • Document available for consultation in the library of the IIR headquarters only.

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